diff options
Diffstat (limited to 'qemu/target-arm/helper.c')
| -rw-r--r-- | qemu/target-arm/helper.c | 7642 |
1 files changed, 7642 insertions, 0 deletions
diff --git a/qemu/target-arm/helper.c b/qemu/target-arm/helper.c new file mode 100644 index 000000000..01f0d0dac --- /dev/null +++ b/qemu/target-arm/helper.c @@ -0,0 +1,7642 @@ +#include "cpu.h" +#include "internals.h" +#include "exec/gdbstub.h" +#include "exec/helper-proto.h" +#include "qemu/host-utils.h" +#include "sysemu/arch_init.h" +#include "sysemu/sysemu.h" +#include "qemu/bitops.h" +#include "qemu/crc32c.h" +#include "exec/cpu_ldst.h" +#include "arm_ldst.h" +#include <zlib.h> /* For crc32 */ +#include "exec/semihost.h" + +#ifndef CONFIG_USER_ONLY +static inline bool get_phys_addr(CPUARMState *env, target_ulong address, + int access_type, ARMMMUIdx mmu_idx, + hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot, + target_ulong *page_size, uint32_t *fsr); + +/* Definitions for the PMCCNTR and PMCR registers */ +#define PMCRD 0x8 +#define PMCRC 0x4 +#define PMCRE 0x1 +#endif + +static int vfp_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg) +{ + int nregs; + + /* VFP data registers are always little-endian. */ + nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16; + if (reg < nregs) { + stfq_le_p(buf, env->vfp.regs[reg]); + return 8; + } + if (arm_feature(env, ARM_FEATURE_NEON)) { + /* Aliases for Q regs. */ + nregs += 16; + if (reg < nregs) { + stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]); + stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]); + return 16; + } + } + switch (reg - nregs) { + case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4; + case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4; + case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4; + } + return 0; +} + +static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg) +{ + int nregs; + + nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16; + if (reg < nregs) { + env->vfp.regs[reg] = ldfq_le_p(buf); + return 8; + } + if (arm_feature(env, ARM_FEATURE_NEON)) { + nregs += 16; + if (reg < nregs) { + env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf); + env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8); + return 16; + } + } + switch (reg - nregs) { + case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4; + case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4; + case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4; + } + return 0; +} + +static int aarch64_fpu_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg) +{ + switch (reg) { + case 0 ... 31: + /* 128 bit FP register */ + stfq_le_p(buf, env->vfp.regs[reg * 2]); + stfq_le_p(buf + 8, env->vfp.regs[reg * 2 + 1]); + return 16; + case 32: + /* FPSR */ + stl_p(buf, vfp_get_fpsr(env)); + return 4; + case 33: + /* FPCR */ + stl_p(buf, vfp_get_fpcr(env)); + return 4; + default: + return 0; + } +} + +static int aarch64_fpu_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg) +{ + switch (reg) { + case 0 ... 31: + /* 128 bit FP register */ + env->vfp.regs[reg * 2] = ldfq_le_p(buf); + env->vfp.regs[reg * 2 + 1] = ldfq_le_p(buf + 8); + return 16; + case 32: + /* FPSR */ + vfp_set_fpsr(env, ldl_p(buf)); + return 4; + case 33: + /* FPCR */ + vfp_set_fpcr(env, ldl_p(buf)); + return 4; + default: + return 0; + } +} + +static uint64_t raw_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + assert(ri->fieldoffset); + if (cpreg_field_is_64bit(ri)) { + return CPREG_FIELD64(env, ri); + } else { + return CPREG_FIELD32(env, ri); + } +} + +static void raw_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + assert(ri->fieldoffset); + if (cpreg_field_is_64bit(ri)) { + CPREG_FIELD64(env, ri) = value; + } else { + CPREG_FIELD32(env, ri) = value; + } +} + +static void *raw_ptr(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return (char *)env + ri->fieldoffset; +} + +static uint64_t read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri) +{ + /* Raw read of a coprocessor register (as needed for migration, etc). */ + if (ri->type & ARM_CP_CONST) { + return ri->resetvalue; + } else if (ri->raw_readfn) { + return ri->raw_readfn(env, ri); + } else if (ri->readfn) { + return ri->readfn(env, ri); + } else { + return raw_read(env, ri); + } +} + +static void write_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t v) +{ + /* Raw write of a coprocessor register (as needed for migration, etc). + * Note that constant registers are treated as write-ignored; the + * caller should check for success by whether a readback gives the + * value written. + */ + if (ri->type & ARM_CP_CONST) { + return; + } else if (ri->raw_writefn) { + ri->raw_writefn(env, ri, v); + } else if (ri->writefn) { + ri->writefn(env, ri, v); + } else { + raw_write(env, ri, v); + } +} + +static bool raw_accessors_invalid(const ARMCPRegInfo *ri) +{ + /* Return true if the regdef would cause an assertion if you called + * read_raw_cp_reg() or write_raw_cp_reg() on it (ie if it is a + * program bug for it not to have the NO_RAW flag). + * NB that returning false here doesn't necessarily mean that calling + * read/write_raw_cp_reg() is safe, because we can't distinguish "has + * read/write access functions which are safe for raw use" from "has + * read/write access functions which have side effects but has forgotten + * to provide raw access functions". + * The tests here line up with the conditions in read/write_raw_cp_reg() + * and assertions in raw_read()/raw_write(). + */ + if ((ri->type & ARM_CP_CONST) || + ri->fieldoffset || + ((ri->raw_writefn || ri->writefn) && (ri->raw_readfn || ri->readfn))) { + return false; + } + return true; +} + +bool write_cpustate_to_list(ARMCPU *cpu) +{ + /* Write the coprocessor state from cpu->env to the (index,value) list. */ + int i; + bool ok = true; + + for (i = 0; i < cpu->cpreg_array_len; i++) { + uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]); + const ARMCPRegInfo *ri; + + ri = get_arm_cp_reginfo(cpu->cp_regs, regidx); + if (!ri) { + ok = false; + continue; + } + if (ri->type & ARM_CP_NO_RAW) { + continue; + } + cpu->cpreg_values[i] = read_raw_cp_reg(&cpu->env, ri); + } + return ok; +} + +bool write_list_to_cpustate(ARMCPU *cpu) +{ + int i; + bool ok = true; + + for (i = 0; i < cpu->cpreg_array_len; i++) { + uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]); + uint64_t v = cpu->cpreg_values[i]; + const ARMCPRegInfo *ri; + + ri = get_arm_cp_reginfo(cpu->cp_regs, regidx); + if (!ri) { + ok = false; + continue; + } + if (ri->type & ARM_CP_NO_RAW) { + continue; + } + /* Write value and confirm it reads back as written + * (to catch read-only registers and partially read-only + * registers where the incoming migration value doesn't match) + */ + write_raw_cp_reg(&cpu->env, ri, v); + if (read_raw_cp_reg(&cpu->env, ri) != v) { + ok = false; + } + } + return ok; +} + +static void add_cpreg_to_list(gpointer key, gpointer opaque) +{ + ARMCPU *cpu = opaque; + uint64_t regidx; + const ARMCPRegInfo *ri; + + regidx = *(uint32_t *)key; + ri = get_arm_cp_reginfo(cpu->cp_regs, regidx); + + if (!(ri->type & (ARM_CP_NO_RAW|ARM_CP_ALIAS))) { + cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx); + /* The value array need not be initialized at this point */ + cpu->cpreg_array_len++; + } +} + +static void count_cpreg(gpointer key, gpointer opaque) +{ + ARMCPU *cpu = opaque; + uint64_t regidx; + const ARMCPRegInfo *ri; + + regidx = *(uint32_t *)key; + ri = get_arm_cp_reginfo(cpu->cp_regs, regidx); + + if (!(ri->type & (ARM_CP_NO_RAW|ARM_CP_ALIAS))) { + cpu->cpreg_array_len++; + } +} + +static gint cpreg_key_compare(gconstpointer a, gconstpointer b) +{ + uint64_t aidx = cpreg_to_kvm_id(*(uint32_t *)a); + uint64_t bidx = cpreg_to_kvm_id(*(uint32_t *)b); + + if (aidx > bidx) { + return 1; + } + if (aidx < bidx) { + return -1; + } + return 0; +} + +void init_cpreg_list(ARMCPU *cpu) +{ + /* Initialise the cpreg_tuples[] array based on the cp_regs hash. + * Note that we require cpreg_tuples[] to be sorted by key ID. + */ + GList *keys; + int arraylen; + + keys = g_hash_table_get_keys(cpu->cp_regs); + keys = g_list_sort(keys, cpreg_key_compare); + + cpu->cpreg_array_len = 0; + + g_list_foreach(keys, count_cpreg, cpu); + + arraylen = cpu->cpreg_array_len; + cpu->cpreg_indexes = g_new(uint64_t, arraylen); + cpu->cpreg_values = g_new(uint64_t, arraylen); + cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen); + cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen); + cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len; + cpu->cpreg_array_len = 0; + + g_list_foreach(keys, add_cpreg_to_list, cpu); + + assert(cpu->cpreg_array_len == arraylen); + + g_list_free(keys); +} + +static void dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + raw_write(env, ri, value); + tlb_flush(CPU(cpu), 1); /* Flush TLB as domain not tracked in TLB */ +} + +static void fcse_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + if (raw_read(env, ri) != value) { + /* Unlike real hardware the qemu TLB uses virtual addresses, + * not modified virtual addresses, so this causes a TLB flush. + */ + tlb_flush(CPU(cpu), 1); + raw_write(env, ri, value); + } +} + +static void contextidr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + if (raw_read(env, ri) != value && !arm_feature(env, ARM_FEATURE_MPU) + && !extended_addresses_enabled(env)) { + /* For VMSA (when not using the LPAE long descriptor page table + * format) this register includes the ASID, so do a TLB flush. + * For PMSA it is purely a process ID and no action is needed. + */ + tlb_flush(CPU(cpu), 1); + } + raw_write(env, ri, value); +} + +static void tlbiall_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Invalidate all (TLBIALL) */ + ARMCPU *cpu = arm_env_get_cpu(env); + + tlb_flush(CPU(cpu), 1); +} + +static void tlbimva_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */ + ARMCPU *cpu = arm_env_get_cpu(env); + + tlb_flush_page(CPU(cpu), value & TARGET_PAGE_MASK); +} + +static void tlbiasid_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Invalidate by ASID (TLBIASID) */ + ARMCPU *cpu = arm_env_get_cpu(env); + + tlb_flush(CPU(cpu), value == 0); +} + +static void tlbimvaa_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */ + ARMCPU *cpu = arm_env_get_cpu(env); + + tlb_flush_page(CPU(cpu), value & TARGET_PAGE_MASK); +} + +/* IS variants of TLB operations must affect all cores */ +static void tlbiall_is_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + CPUState *other_cs; + + CPU_FOREACH(other_cs) { + tlb_flush(other_cs, 1); + } +} + +static void tlbiasid_is_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + CPUState *other_cs; + + CPU_FOREACH(other_cs) { + tlb_flush(other_cs, value == 0); + } +} + +static void tlbimva_is_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + CPUState *other_cs; + + CPU_FOREACH(other_cs) { + tlb_flush_page(other_cs, value & TARGET_PAGE_MASK); + } +} + +static void tlbimvaa_is_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + CPUState *other_cs; + + CPU_FOREACH(other_cs) { + tlb_flush_page(other_cs, value & TARGET_PAGE_MASK); + } +} + +static const ARMCPRegInfo cp_reginfo[] = { + /* Define the secure and non-secure FCSE identifier CP registers + * separately because there is no secure bank in V8 (no _EL3). This allows + * the secure register to be properly reset and migrated. There is also no + * v8 EL1 version of the register so the non-secure instance stands alone. + */ + { .name = "FCSEIDR(NS)", + .cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 0, + .access = PL1_RW, .secure = ARM_CP_SECSTATE_NS, + .fieldoffset = offsetof(CPUARMState, cp15.fcseidr_ns), + .resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, }, + { .name = "FCSEIDR(S)", + .cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 0, + .access = PL1_RW, .secure = ARM_CP_SECSTATE_S, + .fieldoffset = offsetof(CPUARMState, cp15.fcseidr_s), + .resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, }, + /* Define the secure and non-secure context identifier CP registers + * separately because there is no secure bank in V8 (no _EL3). This allows + * the secure register to be properly reset and migrated. In the + * non-secure case, the 32-bit register will have reset and migration + * disabled during registration as it is handled by the 64-bit instance. + */ + { .name = "CONTEXTIDR_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 1, + .access = PL1_RW, .secure = ARM_CP_SECSTATE_NS, + .fieldoffset = offsetof(CPUARMState, cp15.contextidr_el[1]), + .resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, }, + { .name = "CONTEXTIDR(S)", .state = ARM_CP_STATE_AA32, + .cp = 15, .opc1 = 0, .crn = 13, .crm = 0, .opc2 = 1, + .access = PL1_RW, .secure = ARM_CP_SECSTATE_S, + .fieldoffset = offsetof(CPUARMState, cp15.contextidr_s), + .resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo not_v8_cp_reginfo[] = { + /* NB: Some of these registers exist in v8 but with more precise + * definitions that don't use CP_ANY wildcards (mostly in v8_cp_reginfo[]). + */ + /* MMU Domain access control / MPU write buffer control */ + { .name = "DACR", + .cp = 15, .opc1 = CP_ANY, .crn = 3, .crm = CP_ANY, .opc2 = CP_ANY, + .access = PL1_RW, .resetvalue = 0, + .writefn = dacr_write, .raw_writefn = raw_write, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.dacr_s), + offsetoflow32(CPUARMState, cp15.dacr_ns) } }, + /* ARMv7 allocates a range of implementation defined TLB LOCKDOWN regs. + * For v6 and v5, these mappings are overly broad. + */ + { .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 0, + .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP }, + { .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 1, + .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP }, + { .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 4, + .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP }, + { .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = 8, + .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP }, + /* Cache maintenance ops; some of this space may be overridden later. */ + { .name = "CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY, + .opc1 = 0, .opc2 = CP_ANY, .access = PL1_W, + .type = ARM_CP_NOP | ARM_CP_OVERRIDE }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo not_v6_cp_reginfo[] = { + /* Not all pre-v6 cores implemented this WFI, so this is slightly + * over-broad. + */ + { .name = "WFI_v5", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = 2, + .access = PL1_W, .type = ARM_CP_WFI }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo not_v7_cp_reginfo[] = { + /* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which + * is UNPREDICTABLE; we choose to NOP as most implementations do). + */ + { .name = "WFI_v6", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4, + .access = PL1_W, .type = ARM_CP_WFI }, + /* L1 cache lockdown. Not architectural in v6 and earlier but in practice + * implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and + * OMAPCP will override this space. + */ + { .name = "DLOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_data), + .resetvalue = 0 }, + { .name = "ILOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 1, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_insn), + .resetvalue = 0 }, + /* v6 doesn't have the cache ID registers but Linux reads them anyway */ + { .name = "DUMMY", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = CP_ANY, + .access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW, + .resetvalue = 0 }, + /* We don't implement pre-v7 debug but most CPUs had at least a DBGDIDR; + * implementing it as RAZ means the "debug architecture version" bits + * will read as a reserved value, which should cause Linux to not try + * to use the debug hardware. + */ + { .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + /* MMU TLB control. Note that the wildcarding means we cover not just + * the unified TLB ops but also the dside/iside/inner-shareable variants. + */ + { .name = "TLBIALL", .cp = 15, .crn = 8, .crm = CP_ANY, + .opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write, + .type = ARM_CP_NO_RAW }, + { .name = "TLBIMVA", .cp = 15, .crn = 8, .crm = CP_ANY, + .opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write, + .type = ARM_CP_NO_RAW }, + { .name = "TLBIASID", .cp = 15, .crn = 8, .crm = CP_ANY, + .opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write, + .type = ARM_CP_NO_RAW }, + { .name = "TLBIMVAA", .cp = 15, .crn = 8, .crm = CP_ANY, + .opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write, + .type = ARM_CP_NO_RAW }, + { .name = "PRRR", .cp = 15, .crn = 10, .crm = 2, + .opc1 = 0, .opc2 = 0, .access = PL1_RW, .type = ARM_CP_NOP }, + { .name = "NMRR", .cp = 15, .crn = 10, .crm = 2, + .opc1 = 0, .opc2 = 1, .access = PL1_RW, .type = ARM_CP_NOP }, + REGINFO_SENTINEL +}; + +static void cpacr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + uint32_t mask = 0; + + /* In ARMv8 most bits of CPACR_EL1 are RES0. */ + if (!arm_feature(env, ARM_FEATURE_V8)) { + /* ARMv7 defines bits for unimplemented coprocessors as RAZ/WI. + * ASEDIS [31] and D32DIS [30] are both UNK/SBZP without VFP. + * TRCDIS [28] is RAZ/WI since we do not implement a trace macrocell. + */ + if (arm_feature(env, ARM_FEATURE_VFP)) { + /* VFP coprocessor: cp10 & cp11 [23:20] */ + mask |= (1 << 31) | (1 << 30) | (0xf << 20); + + if (!arm_feature(env, ARM_FEATURE_NEON)) { + /* ASEDIS [31] bit is RAO/WI */ + value |= (1 << 31); + } + + /* VFPv3 and upwards with NEON implement 32 double precision + * registers (D0-D31). + */ + if (!arm_feature(env, ARM_FEATURE_NEON) || + !arm_feature(env, ARM_FEATURE_VFP3)) { + /* D32DIS [30] is RAO/WI if D16-31 are not implemented. */ + value |= (1 << 30); + } + } + value &= mask; + } + env->cp15.cpacr_el1 = value; +} + +static CPAccessResult cpacr_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + if (arm_feature(env, ARM_FEATURE_V8)) { + /* Check if CPACR accesses are to be trapped to EL2 */ + if (arm_current_el(env) == 1 && + (env->cp15.cptr_el[2] & CPTR_TCPAC) && !arm_is_secure(env)) { + return CP_ACCESS_TRAP_EL2; + /* Check if CPACR accesses are to be trapped to EL3 */ + } else if (arm_current_el(env) < 3 && + (env->cp15.cptr_el[3] & CPTR_TCPAC)) { + return CP_ACCESS_TRAP_EL3; + } + } + + return CP_ACCESS_OK; +} + +static CPAccessResult cptr_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + /* Check if CPTR accesses are set to trap to EL3 */ + if (arm_current_el(env) == 2 && (env->cp15.cptr_el[3] & CPTR_TCPAC)) { + return CP_ACCESS_TRAP_EL3; + } + + return CP_ACCESS_OK; +} + +static const ARMCPRegInfo v6_cp_reginfo[] = { + /* prefetch by MVA in v6, NOP in v7 */ + { .name = "MVA_prefetch", + .cp = 15, .crn = 7, .crm = 13, .opc1 = 0, .opc2 = 1, + .access = PL1_W, .type = ARM_CP_NOP }, + { .name = "ISB", .cp = 15, .crn = 7, .crm = 5, .opc1 = 0, .opc2 = 4, + .access = PL0_W, .type = ARM_CP_NOP }, + { .name = "DSB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 4, + .access = PL0_W, .type = ARM_CP_NOP }, + { .name = "DMB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 5, + .access = PL0_W, .type = ARM_CP_NOP }, + { .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 2, + .access = PL1_RW, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.ifar_s), + offsetof(CPUARMState, cp15.ifar_ns) }, + .resetvalue = 0, }, + /* Watchpoint Fault Address Register : should actually only be present + * for 1136, 1176, 11MPCore. + */ + { .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1, + .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, }, + { .name = "CPACR", .state = ARM_CP_STATE_BOTH, .opc0 = 3, + .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2, .accessfn = cpacr_access, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.cpacr_el1), + .resetvalue = 0, .writefn = cpacr_write }, + REGINFO_SENTINEL +}; + +static CPAccessResult pmreg_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + /* Performance monitor registers user accessibility is controlled + * by PMUSERENR. + */ + if (arm_current_el(env) == 0 && !env->cp15.c9_pmuserenr) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +#ifndef CONFIG_USER_ONLY + +static inline bool arm_ccnt_enabled(CPUARMState *env) +{ + /* This does not support checking PMCCFILTR_EL0 register */ + + if (!(env->cp15.c9_pmcr & PMCRE)) { + return false; + } + + return true; +} + +void pmccntr_sync(CPUARMState *env) +{ + uint64_t temp_ticks; + + temp_ticks = muldiv64(qemu_clock_get_us(QEMU_CLOCK_VIRTUAL), + get_ticks_per_sec(), 1000000); + + if (env->cp15.c9_pmcr & PMCRD) { + /* Increment once every 64 processor clock cycles */ + temp_ticks /= 64; + } + + if (arm_ccnt_enabled(env)) { + env->cp15.c15_ccnt = temp_ticks - env->cp15.c15_ccnt; + } +} + +static void pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + pmccntr_sync(env); + + if (value & PMCRC) { + /* The counter has been reset */ + env->cp15.c15_ccnt = 0; + } + + /* only the DP, X, D and E bits are writable */ + env->cp15.c9_pmcr &= ~0x39; + env->cp15.c9_pmcr |= (value & 0x39); + + pmccntr_sync(env); +} + +static uint64_t pmccntr_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + uint64_t total_ticks; + + if (!arm_ccnt_enabled(env)) { + /* Counter is disabled, do not change value */ + return env->cp15.c15_ccnt; + } + + total_ticks = muldiv64(qemu_clock_get_us(QEMU_CLOCK_VIRTUAL), + get_ticks_per_sec(), 1000000); + + if (env->cp15.c9_pmcr & PMCRD) { + /* Increment once every 64 processor clock cycles */ + total_ticks /= 64; + } + return total_ticks - env->cp15.c15_ccnt; +} + +static void pmccntr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + uint64_t total_ticks; + + if (!arm_ccnt_enabled(env)) { + /* Counter is disabled, set the absolute value */ + env->cp15.c15_ccnt = value; + return; + } + + total_ticks = muldiv64(qemu_clock_get_us(QEMU_CLOCK_VIRTUAL), + get_ticks_per_sec(), 1000000); + + if (env->cp15.c9_pmcr & PMCRD) { + /* Increment once every 64 processor clock cycles */ + total_ticks /= 64; + } + env->cp15.c15_ccnt = total_ticks - value; +} + +static void pmccntr_write32(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + uint64_t cur_val = pmccntr_read(env, NULL); + + pmccntr_write(env, ri, deposit64(cur_val, 0, 32, value)); +} + +#else /* CONFIG_USER_ONLY */ + +void pmccntr_sync(CPUARMState *env) +{ +} + +#endif + +static void pmccfiltr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + pmccntr_sync(env); + env->cp15.pmccfiltr_el0 = value & 0x7E000000; + pmccntr_sync(env); +} + +static void pmcntenset_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + value &= (1 << 31); + env->cp15.c9_pmcnten |= value; +} + +static void pmcntenclr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + value &= (1 << 31); + env->cp15.c9_pmcnten &= ~value; +} + +static void pmovsr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->cp15.c9_pmovsr &= ~value; +} + +static void pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->cp15.c9_pmxevtyper = value & 0xff; +} + +static void pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->cp15.c9_pmuserenr = value & 1; +} + +static void pmintenset_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* We have no event counters so only the C bit can be changed */ + value &= (1 << 31); + env->cp15.c9_pminten |= value; +} + +static void pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + value &= (1 << 31); + env->cp15.c9_pminten &= ~value; +} + +static void vbar_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Note that even though the AArch64 view of this register has bits + * [10:0] all RES0 we can only mask the bottom 5, to comply with the + * architectural requirements for bits which are RES0 only in some + * contexts. (ARMv8 would permit us to do no masking at all, but ARMv7 + * requires the bottom five bits to be RAZ/WI because they're UNK/SBZP.) + */ + raw_write(env, ri, value & ~0x1FULL); +} + +static void scr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) +{ + /* We only mask off bits that are RES0 both for AArch64 and AArch32. + * For bits that vary between AArch32/64, code needs to check the + * current execution mode before directly using the feature bit. + */ + uint32_t valid_mask = SCR_AARCH64_MASK | SCR_AARCH32_MASK; + + if (!arm_feature(env, ARM_FEATURE_EL2)) { + valid_mask &= ~SCR_HCE; + + /* On ARMv7, SMD (or SCD as it is called in v7) is only + * supported if EL2 exists. The bit is UNK/SBZP when + * EL2 is unavailable. In QEMU ARMv7, we force it to always zero + * when EL2 is unavailable. + * On ARMv8, this bit is always available. + */ + if (arm_feature(env, ARM_FEATURE_V7) && + !arm_feature(env, ARM_FEATURE_V8)) { + valid_mask &= ~SCR_SMD; + } + } + + /* Clear all-context RES0 bits. */ + value &= valid_mask; + raw_write(env, ri, value); +} + +static uint64_t ccsidr_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + /* Acquire the CSSELR index from the bank corresponding to the CCSIDR + * bank + */ + uint32_t index = A32_BANKED_REG_GET(env, csselr, + ri->secure & ARM_CP_SECSTATE_S); + + return cpu->ccsidr[index]; +} + +static void csselr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + raw_write(env, ri, value & 0xf); +} + +static uint64_t isr_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + CPUState *cs = ENV_GET_CPU(env); + uint64_t ret = 0; + + if (cs->interrupt_request & CPU_INTERRUPT_HARD) { + ret |= CPSR_I; + } + if (cs->interrupt_request & CPU_INTERRUPT_FIQ) { + ret |= CPSR_F; + } + /* External aborts are not possible in QEMU so A bit is always clear */ + return ret; +} + +static const ARMCPRegInfo v7_cp_reginfo[] = { + /* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */ + { .name = "NOP", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4, + .access = PL1_W, .type = ARM_CP_NOP }, + /* Performance monitors are implementation defined in v7, + * but with an ARM recommended set of registers, which we + * follow (although we don't actually implement any counters) + * + * Performance registers fall into three categories: + * (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR) + * (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR) + * (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others) + * For the cases controlled by PMUSERENR we must set .access to PL0_RW + * or PL0_RO as appropriate and then check PMUSERENR in the helper fn. + */ + { .name = "PMCNTENSET", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 1, + .access = PL0_RW, .type = ARM_CP_ALIAS, + .fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmcnten), + .writefn = pmcntenset_write, + .accessfn = pmreg_access, + .raw_writefn = raw_write }, + { .name = "PMCNTENSET_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 1, + .access = PL0_RW, .accessfn = pmreg_access, + .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten), .resetvalue = 0, + .writefn = pmcntenset_write, .raw_writefn = raw_write }, + { .name = "PMCNTENCLR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 2, + .access = PL0_RW, + .fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmcnten), + .accessfn = pmreg_access, + .writefn = pmcntenclr_write, + .type = ARM_CP_ALIAS }, + { .name = "PMCNTENCLR_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 2, + .access = PL0_RW, .accessfn = pmreg_access, + .type = ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten), + .writefn = pmcntenclr_write }, + { .name = "PMOVSR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 3, + .access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmovsr), + .accessfn = pmreg_access, + .writefn = pmovsr_write, + .raw_writefn = raw_write }, + /* Unimplemented so WI. */ + { .name = "PMSWINC", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 4, + .access = PL0_W, .accessfn = pmreg_access, .type = ARM_CP_NOP }, + /* Since we don't implement any events, writing to PMSELR is UNPREDICTABLE. + * We choose to RAZ/WI. + */ + { .name = "PMSELR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 5, + .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0, + .accessfn = pmreg_access }, +#ifndef CONFIG_USER_ONLY + { .name = "PMCCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 0, + .access = PL0_RW, .resetvalue = 0, .type = ARM_CP_IO, + .readfn = pmccntr_read, .writefn = pmccntr_write32, + .accessfn = pmreg_access }, + { .name = "PMCCNTR_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 13, .opc2 = 0, + .access = PL0_RW, .accessfn = pmreg_access, + .type = ARM_CP_IO, + .readfn = pmccntr_read, .writefn = pmccntr_write, }, +#endif + { .name = "PMCCFILTR_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 15, .opc2 = 7, + .writefn = pmccfiltr_write, + .access = PL0_RW, .accessfn = pmreg_access, + .type = ARM_CP_IO, + .fieldoffset = offsetof(CPUARMState, cp15.pmccfiltr_el0), + .resetvalue = 0, }, + { .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1, + .access = PL0_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c9_pmxevtyper), + .accessfn = pmreg_access, .writefn = pmxevtyper_write, + .raw_writefn = raw_write }, + /* Unimplemented, RAZ/WI. */ + { .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2, + .access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0, + .accessfn = pmreg_access }, + { .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0, + .access = PL0_R | PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c9_pmuserenr), + .resetvalue = 0, + .writefn = pmuserenr_write, .raw_writefn = raw_write }, + { .name = "PMINTENSET", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 1, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c9_pminten), + .resetvalue = 0, + .writefn = pmintenset_write, .raw_writefn = raw_write }, + { .name = "PMINTENCLR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 2, + .access = PL1_RW, .type = ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, cp15.c9_pminten), + .writefn = pmintenclr_write, }, + { .name = "VBAR", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .writefn = vbar_write, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.vbar_s), + offsetof(CPUARMState, cp15.vbar_ns) }, + .resetvalue = 0 }, + { .name = "CCSIDR", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0, + .access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_RAW }, + { .name = "CSSELR", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0, + .access = PL1_RW, .writefn = csselr_write, .resetvalue = 0, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.csselr_s), + offsetof(CPUARMState, cp15.csselr_ns) } }, + /* Auxiliary ID register: this actually has an IMPDEF value but for now + * just RAZ for all cores: + */ + { .name = "AIDR", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 1, .crn = 0, .crm = 0, .opc2 = 7, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + /* Auxiliary fault status registers: these also are IMPDEF, and we + * choose to RAZ/WI for all cores. + */ + { .name = "AFSR0_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 5, .crm = 1, .opc2 = 0, + .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "AFSR1_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 5, .crm = 1, .opc2 = 1, + .access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, + /* MAIR can just read-as-written because we don't implement caches + * and so don't need to care about memory attributes. + */ + { .name = "MAIR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 0, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.mair_el[1]), + .resetvalue = 0 }, + /* For non-long-descriptor page tables these are PRRR and NMRR; + * regardless they still act as reads-as-written for QEMU. + */ + /* MAIR0/1 are defined separately from their 64-bit counterpart which + * allows them to assign the correct fieldoffset based on the endianness + * handled in the field definitions. + */ + { .name = "MAIR0", .state = ARM_CP_STATE_AA32, + .cp = 15, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 0, .access = PL1_RW, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.mair0_s), + offsetof(CPUARMState, cp15.mair0_ns) }, + .resetfn = arm_cp_reset_ignore }, + { .name = "MAIR1", .state = ARM_CP_STATE_AA32, + .cp = 15, .opc1 = 0, .crn = 10, .crm = 2, .opc2 = 1, .access = PL1_RW, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.mair1_s), + offsetof(CPUARMState, cp15.mair1_ns) }, + .resetfn = arm_cp_reset_ignore }, + { .name = "ISR_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 12, .crm = 1, .opc2 = 0, + .type = ARM_CP_NO_RAW, .access = PL1_R, .readfn = isr_read }, + /* 32 bit ITLB invalidates */ + { .name = "ITLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 0, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiall_write }, + { .name = "ITLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 1, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_write }, + { .name = "ITLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 5, .opc2 = 2, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiasid_write }, + /* 32 bit DTLB invalidates */ + { .name = "DTLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 0, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiall_write }, + { .name = "DTLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 1, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_write }, + { .name = "DTLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 6, .opc2 = 2, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiasid_write }, + /* 32 bit TLB invalidates */ + { .name = "TLBIALL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 0, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiall_write }, + { .name = "TLBIMVA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 1, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_write }, + { .name = "TLBIASID", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 2, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiasid_write }, + { .name = "TLBIMVAA", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 3, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimvaa_write }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo v7mp_cp_reginfo[] = { + /* 32 bit TLB invalidates, Inner Shareable */ + { .name = "TLBIALLIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 0, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbiall_is_write }, + { .name = "TLBIMVAIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 1, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_is_write }, + { .name = "TLBIASIDIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 2, + .type = ARM_CP_NO_RAW, .access = PL1_W, + .writefn = tlbiasid_is_write }, + { .name = "TLBIMVAAIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 3, + .type = ARM_CP_NO_RAW, .access = PL1_W, + .writefn = tlbimvaa_is_write }, + REGINFO_SENTINEL +}; + +static void teecr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + value &= 1; + env->teecr = value; +} + +static CPAccessResult teehbr_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + if (arm_current_el(env) == 0 && (env->teecr & 1)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +static const ARMCPRegInfo t2ee_cp_reginfo[] = { + { .name = "TEECR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 6, .opc2 = 0, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, teecr), + .resetvalue = 0, + .writefn = teecr_write }, + { .name = "TEEHBR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 6, .opc2 = 0, + .access = PL0_RW, .fieldoffset = offsetof(CPUARMState, teehbr), + .accessfn = teehbr_access, .resetvalue = 0 }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo v6k_cp_reginfo[] = { + { .name = "TPIDR_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .opc2 = 2, .crn = 13, .crm = 0, + .access = PL0_RW, + .fieldoffset = offsetof(CPUARMState, cp15.tpidr_el[0]), .resetvalue = 0 }, + { .name = "TPIDRURW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 2, + .access = PL0_RW, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.tpidrurw_s), + offsetoflow32(CPUARMState, cp15.tpidrurw_ns) }, + .resetfn = arm_cp_reset_ignore }, + { .name = "TPIDRRO_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .opc2 = 3, .crn = 13, .crm = 0, + .access = PL0_R|PL1_W, + .fieldoffset = offsetof(CPUARMState, cp15.tpidrro_el[0]), + .resetvalue = 0}, + { .name = "TPIDRURO", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 3, + .access = PL0_R|PL1_W, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.tpidruro_s), + offsetoflow32(CPUARMState, cp15.tpidruro_ns) }, + .resetfn = arm_cp_reset_ignore }, + { .name = "TPIDR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .opc2 = 4, .crn = 13, .crm = 0, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.tpidr_el[1]), .resetvalue = 0 }, + { .name = "TPIDRPRW", .opc1 = 0, .cp = 15, .crn = 13, .crm = 0, .opc2 = 4, + .access = PL1_RW, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.tpidrprw_s), + offsetoflow32(CPUARMState, cp15.tpidrprw_ns) }, + .resetvalue = 0 }, + REGINFO_SENTINEL +}; + +#ifndef CONFIG_USER_ONLY + +static CPAccessResult gt_cntfrq_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + /* CNTFRQ: not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero */ + if (arm_current_el(env) == 0 && !extract32(env->cp15.c14_cntkctl, 0, 2)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +static CPAccessResult gt_counter_access(CPUARMState *env, int timeridx) +{ + /* CNT[PV]CT: not visible from PL0 if ELO[PV]CTEN is zero */ + if (arm_current_el(env) == 0 && + !extract32(env->cp15.c14_cntkctl, timeridx, 1)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +static CPAccessResult gt_timer_access(CPUARMState *env, int timeridx) +{ + /* CNT[PV]_CVAL, CNT[PV]_CTL, CNT[PV]_TVAL: not visible from PL0 if + * EL0[PV]TEN is zero. + */ + if (arm_current_el(env) == 0 && + !extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +static CPAccessResult gt_pct_access(CPUARMState *env, + const ARMCPRegInfo *ri) +{ + return gt_counter_access(env, GTIMER_PHYS); +} + +static CPAccessResult gt_vct_access(CPUARMState *env, + const ARMCPRegInfo *ri) +{ + return gt_counter_access(env, GTIMER_VIRT); +} + +static CPAccessResult gt_ptimer_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return gt_timer_access(env, GTIMER_PHYS); +} + +static CPAccessResult gt_vtimer_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return gt_timer_access(env, GTIMER_VIRT); +} + +static uint64_t gt_get_countervalue(CPUARMState *env) +{ + return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / GTIMER_SCALE; +} + +static void gt_recalc_timer(ARMCPU *cpu, int timeridx) +{ + ARMGenericTimer *gt = &cpu->env.cp15.c14_timer[timeridx]; + + if (gt->ctl & 1) { + /* Timer enabled: calculate and set current ISTATUS, irq, and + * reset timer to when ISTATUS next has to change + */ + uint64_t count = gt_get_countervalue(&cpu->env); + /* Note that this must be unsigned 64 bit arithmetic: */ + int istatus = count >= gt->cval; + uint64_t nexttick; + + gt->ctl = deposit32(gt->ctl, 2, 1, istatus); + qemu_set_irq(cpu->gt_timer_outputs[timeridx], + (istatus && !(gt->ctl & 2))); + if (istatus) { + /* Next transition is when count rolls back over to zero */ + nexttick = UINT64_MAX; + } else { + /* Next transition is when we hit cval */ + nexttick = gt->cval; + } + /* Note that the desired next expiry time might be beyond the + * signed-64-bit range of a QEMUTimer -- in this case we just + * set the timer for as far in the future as possible. When the + * timer expires we will reset the timer for any remaining period. + */ + if (nexttick > INT64_MAX / GTIMER_SCALE) { + nexttick = INT64_MAX / GTIMER_SCALE; + } + timer_mod(cpu->gt_timer[timeridx], nexttick); + } else { + /* Timer disabled: ISTATUS and timer output always clear */ + gt->ctl &= ~4; + qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0); + timer_del(cpu->gt_timer[timeridx]); + } +} + +static void gt_cnt_reset(CPUARMState *env, const ARMCPRegInfo *ri) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + int timeridx = ri->opc1 & 1; + + timer_del(cpu->gt_timer[timeridx]); +} + +static uint64_t gt_cnt_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return gt_get_countervalue(env); +} + +static void gt_cval_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + int timeridx = ri->opc1 & 1; + + env->cp15.c14_timer[timeridx].cval = value; + gt_recalc_timer(arm_env_get_cpu(env), timeridx); +} + +static uint64_t gt_tval_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + int timeridx = ri->crm & 1; + + return (uint32_t)(env->cp15.c14_timer[timeridx].cval - + gt_get_countervalue(env)); +} + +static void gt_tval_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + int timeridx = ri->crm & 1; + + env->cp15.c14_timer[timeridx].cval = gt_get_countervalue(env) + + sextract64(value, 0, 32); + gt_recalc_timer(arm_env_get_cpu(env), timeridx); +} + +static void gt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + int timeridx = ri->crm & 1; + uint32_t oldval = env->cp15.c14_timer[timeridx].ctl; + + env->cp15.c14_timer[timeridx].ctl = deposit64(oldval, 0, 2, value); + if ((oldval ^ value) & 1) { + /* Enable toggled */ + gt_recalc_timer(cpu, timeridx); + } else if ((oldval ^ value) & 2) { + /* IMASK toggled: don't need to recalculate, + * just set the interrupt line based on ISTATUS + */ + qemu_set_irq(cpu->gt_timer_outputs[timeridx], + (oldval & 4) && !(value & 2)); + } +} + +void arm_gt_ptimer_cb(void *opaque) +{ + ARMCPU *cpu = opaque; + + gt_recalc_timer(cpu, GTIMER_PHYS); +} + +void arm_gt_vtimer_cb(void *opaque) +{ + ARMCPU *cpu = opaque; + + gt_recalc_timer(cpu, GTIMER_VIRT); +} + +static const ARMCPRegInfo generic_timer_cp_reginfo[] = { + /* Note that CNTFRQ is purely reads-as-written for the benefit + * of software; writing it doesn't actually change the timer frequency. + * Our reset value matches the fixed frequency we implement the timer at. + */ + { .name = "CNTFRQ", .cp = 15, .crn = 14, .crm = 0, .opc1 = 0, .opc2 = 0, + .type = ARM_CP_ALIAS, + .access = PL1_RW | PL0_R, .accessfn = gt_cntfrq_access, + .fieldoffset = offsetoflow32(CPUARMState, cp15.c14_cntfrq), + }, + { .name = "CNTFRQ_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 0, + .access = PL1_RW | PL0_R, .accessfn = gt_cntfrq_access, + .fieldoffset = offsetof(CPUARMState, cp15.c14_cntfrq), + .resetvalue = (1000 * 1000 * 1000) / GTIMER_SCALE, + }, + /* overall control: mostly access permissions */ + { .name = "CNTKCTL", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 14, .crm = 1, .opc2 = 0, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl), + .resetvalue = 0, + }, + /* per-timer control */ + { .name = "CNTP_CTL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 1, + .type = ARM_CP_IO | ARM_CP_ALIAS, .access = PL1_RW | PL0_R, + .accessfn = gt_ptimer_access, + .fieldoffset = offsetoflow32(CPUARMState, + cp15.c14_timer[GTIMER_PHYS].ctl), + .writefn = gt_ctl_write, .raw_writefn = raw_write, + }, + { .name = "CNTP_CTL_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 1, + .type = ARM_CP_IO, .access = PL1_RW | PL0_R, + .accessfn = gt_ptimer_access, + .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].ctl), + .resetvalue = 0, + .writefn = gt_ctl_write, .raw_writefn = raw_write, + }, + { .name = "CNTV_CTL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 1, + .type = ARM_CP_IO | ARM_CP_ALIAS, .access = PL1_RW | PL0_R, + .accessfn = gt_vtimer_access, + .fieldoffset = offsetoflow32(CPUARMState, + cp15.c14_timer[GTIMER_VIRT].ctl), + .writefn = gt_ctl_write, .raw_writefn = raw_write, + }, + { .name = "CNTV_CTL_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 1, + .type = ARM_CP_IO, .access = PL1_RW | PL0_R, + .accessfn = gt_vtimer_access, + .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].ctl), + .resetvalue = 0, + .writefn = gt_ctl_write, .raw_writefn = raw_write, + }, + /* TimerValue views: a 32 bit downcounting view of the underlying state */ + { .name = "CNTP_TVAL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 0, + .type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R, + .accessfn = gt_ptimer_access, + .readfn = gt_tval_read, .writefn = gt_tval_write, + }, + { .name = "CNTP_TVAL_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 0, + .type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R, + .accessfn = gt_ptimer_access, + .readfn = gt_tval_read, .writefn = gt_tval_write, + }, + { .name = "CNTV_TVAL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 0, + .type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R, + .accessfn = gt_vtimer_access, + .readfn = gt_tval_read, .writefn = gt_tval_write, + }, + { .name = "CNTV_TVAL_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 0, + .type = ARM_CP_NO_RAW | ARM_CP_IO, .access = PL1_RW | PL0_R, + .accessfn = gt_vtimer_access, + .readfn = gt_tval_read, .writefn = gt_tval_write, + }, + /* The counter itself */ + { .name = "CNTPCT", .cp = 15, .crm = 14, .opc1 = 0, + .access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_RAW | ARM_CP_IO, + .accessfn = gt_pct_access, + .readfn = gt_cnt_read, .resetfn = arm_cp_reset_ignore, + }, + { .name = "CNTPCT_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 1, + .access = PL0_R, .type = ARM_CP_NO_RAW | ARM_CP_IO, + .accessfn = gt_pct_access, + .readfn = gt_cnt_read, .resetfn = gt_cnt_reset, + }, + { .name = "CNTVCT", .cp = 15, .crm = 14, .opc1 = 1, + .access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_RAW | ARM_CP_IO, + .accessfn = gt_vct_access, + .readfn = gt_cnt_read, .resetfn = arm_cp_reset_ignore, + }, + { .name = "CNTVCT_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 0, .opc2 = 2, + .access = PL0_R, .type = ARM_CP_NO_RAW | ARM_CP_IO, + .accessfn = gt_vct_access, + .readfn = gt_cnt_read, .resetfn = gt_cnt_reset, + }, + /* Comparison value, indicating when the timer goes off */ + { .name = "CNTP_CVAL", .cp = 15, .crm = 14, .opc1 = 2, + .access = PL1_RW | PL0_R, + .type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval), + .accessfn = gt_ptimer_access, + .writefn = gt_cval_write, .raw_writefn = raw_write, + }, + { .name = "CNTP_CVAL_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 2, .opc2 = 2, + .access = PL1_RW | PL0_R, + .type = ARM_CP_IO, + .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval), + .resetvalue = 0, .accessfn = gt_ptimer_access, + .writefn = gt_cval_write, .raw_writefn = raw_write, + }, + { .name = "CNTV_CVAL", .cp = 15, .crm = 14, .opc1 = 3, + .access = PL1_RW | PL0_R, + .type = ARM_CP_64BIT | ARM_CP_IO | ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval), + .accessfn = gt_vtimer_access, + .writefn = gt_cval_write, .raw_writefn = raw_write, + }, + { .name = "CNTV_CVAL_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 14, .crm = 3, .opc2 = 2, + .access = PL1_RW | PL0_R, + .type = ARM_CP_IO, + .fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval), + .resetvalue = 0, .accessfn = gt_vtimer_access, + .writefn = gt_cval_write, .raw_writefn = raw_write, + }, + REGINFO_SENTINEL +}; + +#else +/* In user-mode none of the generic timer registers are accessible, + * and their implementation depends on QEMU_CLOCK_VIRTUAL and qdev gpio outputs, + * so instead just don't register any of them. + */ +static const ARMCPRegInfo generic_timer_cp_reginfo[] = { + REGINFO_SENTINEL +}; + +#endif + +static void par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) +{ + if (arm_feature(env, ARM_FEATURE_LPAE)) { + raw_write(env, ri, value); + } else if (arm_feature(env, ARM_FEATURE_V7)) { + raw_write(env, ri, value & 0xfffff6ff); + } else { + raw_write(env, ri, value & 0xfffff1ff); + } +} + +#ifndef CONFIG_USER_ONLY +/* get_phys_addr() isn't present for user-mode-only targets */ + +static CPAccessResult ats_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + if (ri->opc2 & 4) { + /* Other states are only available with TrustZone; in + * a non-TZ implementation these registers don't exist + * at all, which is an Uncategorized trap. This underdecoding + * is safe because the reginfo is NO_RAW. + */ + return CP_ACCESS_TRAP_UNCATEGORIZED; + } + return CP_ACCESS_OK; +} + +static uint64_t do_ats_write(CPUARMState *env, uint64_t value, + int access_type, ARMMMUIdx mmu_idx) +{ + hwaddr phys_addr; + target_ulong page_size; + int prot; + uint32_t fsr; + bool ret; + uint64_t par64; + MemTxAttrs attrs = {}; + + ret = get_phys_addr(env, value, access_type, mmu_idx, + &phys_addr, &attrs, &prot, &page_size, &fsr); + if (extended_addresses_enabled(env)) { + /* fsr is a DFSR/IFSR value for the long descriptor + * translation table format, but with WnR always clear. + * Convert it to a 64-bit PAR. + */ + par64 = (1 << 11); /* LPAE bit always set */ + if (!ret) { + par64 |= phys_addr & ~0xfffULL; + if (!attrs.secure) { + par64 |= (1 << 9); /* NS */ + } + /* We don't set the ATTR or SH fields in the PAR. */ + } else { + par64 |= 1; /* F */ + par64 |= (fsr & 0x3f) << 1; /* FS */ + /* Note that S2WLK and FSTAGE are always zero, because we don't + * implement virtualization and therefore there can't be a stage 2 + * fault. + */ + } + } else { + /* fsr is a DFSR/IFSR value for the short descriptor + * translation table format (with WnR always clear). + * Convert it to a 32-bit PAR. + */ + if (!ret) { + /* We do not set any attribute bits in the PAR */ + if (page_size == (1 << 24) + && arm_feature(env, ARM_FEATURE_V7)) { + par64 = (phys_addr & 0xff000000) | (1 << 1); + } else { + par64 = phys_addr & 0xfffff000; + } + if (!attrs.secure) { + par64 |= (1 << 9); /* NS */ + } + } else { + par64 = ((fsr & (1 << 10)) >> 5) | ((fsr & (1 << 12)) >> 6) | + ((fsr & 0xf) << 1) | 1; + } + } + return par64; +} + +static void ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) +{ + int access_type = ri->opc2 & 1; + uint64_t par64; + ARMMMUIdx mmu_idx; + int el = arm_current_el(env); + bool secure = arm_is_secure_below_el3(env); + + switch (ri->opc2 & 6) { + case 0: + /* stage 1 current state PL1: ATS1CPR, ATS1CPW */ + switch (el) { + case 3: + mmu_idx = ARMMMUIdx_S1E3; + break; + case 2: + mmu_idx = ARMMMUIdx_S1NSE1; + break; + case 1: + mmu_idx = secure ? ARMMMUIdx_S1SE1 : ARMMMUIdx_S1NSE1; + break; + default: + g_assert_not_reached(); + } + break; + case 2: + /* stage 1 current state PL0: ATS1CUR, ATS1CUW */ + switch (el) { + case 3: + mmu_idx = ARMMMUIdx_S1SE0; + break; + case 2: + mmu_idx = ARMMMUIdx_S1NSE0; + break; + case 1: + mmu_idx = secure ? ARMMMUIdx_S1SE0 : ARMMMUIdx_S1NSE0; + break; + default: + g_assert_not_reached(); + } + break; + case 4: + /* stage 1+2 NonSecure PL1: ATS12NSOPR, ATS12NSOPW */ + mmu_idx = ARMMMUIdx_S12NSE1; + break; + case 6: + /* stage 1+2 NonSecure PL0: ATS12NSOUR, ATS12NSOUW */ + mmu_idx = ARMMMUIdx_S12NSE0; + break; + default: + g_assert_not_reached(); + } + + par64 = do_ats_write(env, value, access_type, mmu_idx); + + A32_BANKED_CURRENT_REG_SET(env, par, par64); +} + +static void ats_write64(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + int access_type = ri->opc2 & 1; + ARMMMUIdx mmu_idx; + int secure = arm_is_secure_below_el3(env); + + switch (ri->opc2 & 6) { + case 0: + switch (ri->opc1) { + case 0: /* AT S1E1R, AT S1E1W */ + mmu_idx = secure ? ARMMMUIdx_S1SE1 : ARMMMUIdx_S1NSE1; + break; + case 4: /* AT S1E2R, AT S1E2W */ + mmu_idx = ARMMMUIdx_S1E2; + break; + case 6: /* AT S1E3R, AT S1E3W */ + mmu_idx = ARMMMUIdx_S1E3; + break; + default: + g_assert_not_reached(); + } + break; + case 2: /* AT S1E0R, AT S1E0W */ + mmu_idx = secure ? ARMMMUIdx_S1SE0 : ARMMMUIdx_S1NSE0; + break; + case 4: /* AT S12E1R, AT S12E1W */ + mmu_idx = ARMMMUIdx_S12NSE1; + break; + case 6: /* AT S12E0R, AT S12E0W */ + mmu_idx = ARMMMUIdx_S12NSE0; + break; + default: + g_assert_not_reached(); + } + + env->cp15.par_el[1] = do_ats_write(env, value, access_type, mmu_idx); +} +#endif + +static const ARMCPRegInfo vapa_cp_reginfo[] = { + { .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .resetvalue = 0, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.par_s), + offsetoflow32(CPUARMState, cp15.par_ns) }, + .writefn = par_write }, +#ifndef CONFIG_USER_ONLY + { .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY, + .access = PL1_W, .accessfn = ats_access, + .writefn = ats_write, .type = ARM_CP_NO_RAW }, +#endif + REGINFO_SENTINEL +}; + +/* Return basic MPU access permission bits. */ +static uint32_t simple_mpu_ap_bits(uint32_t val) +{ + uint32_t ret; + uint32_t mask; + int i; + ret = 0; + mask = 3; + for (i = 0; i < 16; i += 2) { + ret |= (val >> i) & mask; + mask <<= 2; + } + return ret; +} + +/* Pad basic MPU access permission bits to extended format. */ +static uint32_t extended_mpu_ap_bits(uint32_t val) +{ + uint32_t ret; + uint32_t mask; + int i; + ret = 0; + mask = 3; + for (i = 0; i < 16; i += 2) { + ret |= (val & mask) << i; + mask <<= 2; + } + return ret; +} + +static void pmsav5_data_ap_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->cp15.pmsav5_data_ap = extended_mpu_ap_bits(value); +} + +static uint64_t pmsav5_data_ap_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return simple_mpu_ap_bits(env->cp15.pmsav5_data_ap); +} + +static void pmsav5_insn_ap_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->cp15.pmsav5_insn_ap = extended_mpu_ap_bits(value); +} + +static uint64_t pmsav5_insn_ap_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return simple_mpu_ap_bits(env->cp15.pmsav5_insn_ap); +} + +static uint64_t pmsav7_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + uint32_t *u32p = *(uint32_t **)raw_ptr(env, ri); + + if (!u32p) { + return 0; + } + + u32p += env->cp15.c6_rgnr; + return *u32p; +} + +static void pmsav7_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + uint32_t *u32p = *(uint32_t **)raw_ptr(env, ri); + + if (!u32p) { + return; + } + + u32p += env->cp15.c6_rgnr; + tlb_flush(CPU(cpu), 1); /* Mappings may have changed - purge! */ + *u32p = value; +} + +static void pmsav7_reset(CPUARMState *env, const ARMCPRegInfo *ri) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + uint32_t *u32p = *(uint32_t **)raw_ptr(env, ri); + + if (!u32p) { + return; + } + + memset(u32p, 0, sizeof(*u32p) * cpu->pmsav7_dregion); +} + +static void pmsav7_rgnr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + uint32_t nrgs = cpu->pmsav7_dregion; + + if (value >= nrgs) { + qemu_log_mask(LOG_GUEST_ERROR, + "PMSAv7 RGNR write >= # supported regions, %" PRIu32 + " > %" PRIu32 "\n", (uint32_t)value, nrgs); + return; + } + + raw_write(env, ri, value); +} + +static const ARMCPRegInfo pmsav7_cp_reginfo[] = { + { .name = "DRBAR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 0, + .access = PL1_RW, .type = ARM_CP_NO_RAW, + .fieldoffset = offsetof(CPUARMState, pmsav7.drbar), + .readfn = pmsav7_read, .writefn = pmsav7_write, .resetfn = pmsav7_reset }, + { .name = "DRSR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 2, + .access = PL1_RW, .type = ARM_CP_NO_RAW, + .fieldoffset = offsetof(CPUARMState, pmsav7.drsr), + .readfn = pmsav7_read, .writefn = pmsav7_write, .resetfn = pmsav7_reset }, + { .name = "DRACR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 1, .opc2 = 4, + .access = PL1_RW, .type = ARM_CP_NO_RAW, + .fieldoffset = offsetof(CPUARMState, pmsav7.dracr), + .readfn = pmsav7_read, .writefn = pmsav7_write, .resetfn = pmsav7_reset }, + { .name = "RGNR", .cp = 15, .crn = 6, .opc1 = 0, .crm = 2, .opc2 = 0, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c6_rgnr), + .writefn = pmsav7_rgnr_write }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo pmsav5_cp_reginfo[] = { + { .name = "DATA_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .type = ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, cp15.pmsav5_data_ap), + .readfn = pmsav5_data_ap_read, .writefn = pmsav5_data_ap_write, }, + { .name = "INSN_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1, + .access = PL1_RW, .type = ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, cp15.pmsav5_insn_ap), + .readfn = pmsav5_insn_ap_read, .writefn = pmsav5_insn_ap_write, }, + { .name = "DATA_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 2, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.pmsav5_data_ap), + .resetvalue = 0, }, + { .name = "INSN_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 3, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.pmsav5_insn_ap), + .resetvalue = 0, }, + { .name = "DCACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c2_data), .resetvalue = 0, }, + { .name = "ICACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c2_insn), .resetvalue = 0, }, + /* Protection region base and size registers */ + { .name = "946_PRBS0", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, + .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.c6_region[0]) }, + { .name = "946_PRBS1", .cp = 15, .crn = 6, .crm = 1, .opc1 = 0, + .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.c6_region[1]) }, + { .name = "946_PRBS2", .cp = 15, .crn = 6, .crm = 2, .opc1 = 0, + .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.c6_region[2]) }, + { .name = "946_PRBS3", .cp = 15, .crn = 6, .crm = 3, .opc1 = 0, + .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.c6_region[3]) }, + { .name = "946_PRBS4", .cp = 15, .crn = 6, .crm = 4, .opc1 = 0, + .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.c6_region[4]) }, + { .name = "946_PRBS5", .cp = 15, .crn = 6, .crm = 5, .opc1 = 0, + .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.c6_region[5]) }, + { .name = "946_PRBS6", .cp = 15, .crn = 6, .crm = 6, .opc1 = 0, + .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.c6_region[6]) }, + { .name = "946_PRBS7", .cp = 15, .crn = 6, .crm = 7, .opc1 = 0, + .opc2 = CP_ANY, .access = PL1_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.c6_region[7]) }, + REGINFO_SENTINEL +}; + +static void vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + TCR *tcr = raw_ptr(env, ri); + int maskshift = extract32(value, 0, 3); + + if (!arm_feature(env, ARM_FEATURE_V8)) { + if (arm_feature(env, ARM_FEATURE_LPAE) && (value & TTBCR_EAE)) { + /* Pre ARMv8 bits [21:19], [15:14] and [6:3] are UNK/SBZP when + * using Long-desciptor translation table format */ + value &= ~((7 << 19) | (3 << 14) | (0xf << 3)); + } else if (arm_feature(env, ARM_FEATURE_EL3)) { + /* In an implementation that includes the Security Extensions + * TTBCR has additional fields PD0 [4] and PD1 [5] for + * Short-descriptor translation table format. + */ + value &= TTBCR_PD1 | TTBCR_PD0 | TTBCR_N; + } else { + value &= TTBCR_N; + } + } + + /* Update the masks corresponding to the the TCR bank being written + * Note that we always calculate mask and base_mask, but + * they are only used for short-descriptor tables (ie if EAE is 0); + * for long-descriptor tables the TCR fields are used differently + * and the mask and base_mask values are meaningless. + */ + tcr->raw_tcr = value; + tcr->mask = ~(((uint32_t)0xffffffffu) >> maskshift); + tcr->base_mask = ~((uint32_t)0x3fffu >> maskshift); +} + +static void vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + if (arm_feature(env, ARM_FEATURE_LPAE)) { + /* With LPAE the TTBCR could result in a change of ASID + * via the TTBCR.A1 bit, so do a TLB flush. + */ + tlb_flush(CPU(cpu), 1); + } + vmsa_ttbcr_raw_write(env, ri, value); +} + +static void vmsa_ttbcr_reset(CPUARMState *env, const ARMCPRegInfo *ri) +{ + TCR *tcr = raw_ptr(env, ri); + + /* Reset both the TCR as well as the masks corresponding to the bank of + * the TCR being reset. + */ + tcr->raw_tcr = 0; + tcr->mask = 0; + tcr->base_mask = 0xffffc000u; +} + +static void vmsa_tcr_el1_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + TCR *tcr = raw_ptr(env, ri); + + /* For AArch64 the A1 bit could result in a change of ASID, so TLB flush. */ + tlb_flush(CPU(cpu), 1); + tcr->raw_tcr = value; +} + +static void vmsa_ttbr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* 64 bit accesses to the TTBRs can change the ASID and so we + * must flush the TLB. + */ + if (cpreg_field_is_64bit(ri)) { + ARMCPU *cpu = arm_env_get_cpu(env); + + tlb_flush(CPU(cpu), 1); + } + raw_write(env, ri, value); +} + +static const ARMCPRegInfo vmsa_pmsa_cp_reginfo[] = { + { .name = "DFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .type = ARM_CP_ALIAS, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.dfsr_s), + offsetoflow32(CPUARMState, cp15.dfsr_ns) }, }, + { .name = "IFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1, + .access = PL1_RW, .resetvalue = 0, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.ifsr_s), + offsetoflow32(CPUARMState, cp15.ifsr_ns) } }, + { .name = "DFAR", .cp = 15, .opc1 = 0, .crn = 6, .crm = 0, .opc2 = 0, + .access = PL1_RW, .resetvalue = 0, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.dfar_s), + offsetof(CPUARMState, cp15.dfar_ns) } }, + { .name = "FAR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el[1]), + .resetvalue = 0, }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo vmsa_cp_reginfo[] = { + { .name = "ESR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .crn = 5, .crm = 2, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.esr_el[1]), .resetvalue = 0, }, + { .name = "TTBR0_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 2, .crm = 0, .opc2 = 0, + .access = PL1_RW, .writefn = vmsa_ttbr_write, .resetvalue = 0, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr0_s), + offsetof(CPUARMState, cp15.ttbr0_ns) } }, + { .name = "TTBR1_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 2, .crm = 0, .opc2 = 1, + .access = PL1_RW, .writefn = vmsa_ttbr_write, .resetvalue = 0, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr1_s), + offsetof(CPUARMState, cp15.ttbr1_ns) } }, + { .name = "TCR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2, + .access = PL1_RW, .writefn = vmsa_tcr_el1_write, + .resetfn = vmsa_ttbcr_reset, .raw_writefn = raw_write, + .fieldoffset = offsetof(CPUARMState, cp15.tcr_el[1]) }, + { .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2, + .access = PL1_RW, .type = ARM_CP_ALIAS, .writefn = vmsa_ttbcr_write, + .raw_writefn = vmsa_ttbcr_raw_write, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.tcr_el[3]), + offsetoflow32(CPUARMState, cp15.tcr_el[1])} }, + REGINFO_SENTINEL +}; + +static void omap_ticonfig_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->cp15.c15_ticonfig = value & 0xe7; + /* The OS_TYPE bit in this register changes the reported CPUID! */ + env->cp15.c0_cpuid = (value & (1 << 5)) ? + ARM_CPUID_TI915T : ARM_CPUID_TI925T; +} + +static void omap_threadid_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->cp15.c15_threadid = value & 0xffff; +} + +static void omap_wfi_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Wait-for-interrupt (deprecated) */ + cpu_interrupt(CPU(arm_env_get_cpu(env)), CPU_INTERRUPT_HALT); +} + +static void omap_cachemaint_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* On OMAP there are registers indicating the max/min index of dcache lines + * containing a dirty line; cache flush operations have to reset these. + */ + env->cp15.c15_i_max = 0x000; + env->cp15.c15_i_min = 0xff0; +} + +static const ARMCPRegInfo omap_cp_reginfo[] = { + { .name = "DFSR", .cp = 15, .crn = 5, .crm = CP_ANY, + .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_OVERRIDE, + .fieldoffset = offsetoflow32(CPUARMState, cp15.esr_el[1]), + .resetvalue = 0, }, + { .name = "", .cp = 15, .crn = 15, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .type = ARM_CP_NOP }, + { .name = "TICONFIG", .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c15_ticonfig), .resetvalue = 0, + .writefn = omap_ticonfig_write }, + { .name = "IMAX", .cp = 15, .crn = 15, .crm = 2, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c15_i_max), .resetvalue = 0, }, + { .name = "IMIN", .cp = 15, .crn = 15, .crm = 3, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .resetvalue = 0xff0, + .fieldoffset = offsetof(CPUARMState, cp15.c15_i_min) }, + { .name = "THREADID", .cp = 15, .crn = 15, .crm = 4, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c15_threadid), .resetvalue = 0, + .writefn = omap_threadid_write }, + { .name = "TI925T_STATUS", .cp = 15, .crn = 15, + .crm = 8, .opc1 = 0, .opc2 = 0, .access = PL1_RW, + .type = ARM_CP_NO_RAW, + .readfn = arm_cp_read_zero, .writefn = omap_wfi_write, }, + /* TODO: Peripheral port remap register: + * On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller + * base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff), + * when MMU is off. + */ + { .name = "OMAP_CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY, + .opc1 = 0, .opc2 = CP_ANY, .access = PL1_W, + .type = ARM_CP_OVERRIDE | ARM_CP_NO_RAW, + .writefn = omap_cachemaint_write }, + { .name = "C9", .cp = 15, .crn = 9, + .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, + .type = ARM_CP_CONST | ARM_CP_OVERRIDE, .resetvalue = 0 }, + REGINFO_SENTINEL +}; + +static void xscale_cpar_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->cp15.c15_cpar = value & 0x3fff; +} + +static const ARMCPRegInfo xscale_cp_reginfo[] = { + { .name = "XSCALE_CPAR", + .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0, .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c15_cpar), .resetvalue = 0, + .writefn = xscale_cpar_write, }, + { .name = "XSCALE_AUXCR", + .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.c1_xscaleauxcr), + .resetvalue = 0, }, + /* XScale specific cache-lockdown: since we have no cache we NOP these + * and hope the guest does not really rely on cache behaviour. + */ + { .name = "XSCALE_LOCK_ICACHE_LINE", + .cp = 15, .opc1 = 0, .crn = 9, .crm = 1, .opc2 = 0, + .access = PL1_W, .type = ARM_CP_NOP }, + { .name = "XSCALE_UNLOCK_ICACHE", + .cp = 15, .opc1 = 0, .crn = 9, .crm = 1, .opc2 = 1, + .access = PL1_W, .type = ARM_CP_NOP }, + { .name = "XSCALE_DCACHE_LOCK", + .cp = 15, .opc1 = 0, .crn = 9, .crm = 2, .opc2 = 0, + .access = PL1_RW, .type = ARM_CP_NOP }, + { .name = "XSCALE_UNLOCK_DCACHE", + .cp = 15, .opc1 = 0, .crn = 9, .crm = 2, .opc2 = 1, + .access = PL1_W, .type = ARM_CP_NOP }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo dummy_c15_cp_reginfo[] = { + /* RAZ/WI the whole crn=15 space, when we don't have a more specific + * implementation of this implementation-defined space. + * Ideally this should eventually disappear in favour of actually + * implementing the correct behaviour for all cores. + */ + { .name = "C15_IMPDEF", .cp = 15, .crn = 15, + .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, + .access = PL1_RW, + .type = ARM_CP_CONST | ARM_CP_NO_RAW | ARM_CP_OVERRIDE, + .resetvalue = 0 }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo cache_dirty_status_cp_reginfo[] = { + /* Cache status: RAZ because we have no cache so it's always clean */ + { .name = "CDSR", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 6, + .access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW, + .resetvalue = 0 }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo cache_block_ops_cp_reginfo[] = { + /* We never have a a block transfer operation in progress */ + { .name = "BXSR", .cp = 15, .crn = 7, .crm = 12, .opc1 = 0, .opc2 = 4, + .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW, + .resetvalue = 0 }, + /* The cache ops themselves: these all NOP for QEMU */ + { .name = "IICR", .cp = 15, .crm = 5, .opc1 = 0, + .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, + { .name = "IDCR", .cp = 15, .crm = 6, .opc1 = 0, + .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, + { .name = "CDCR", .cp = 15, .crm = 12, .opc1 = 0, + .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, + { .name = "PIR", .cp = 15, .crm = 12, .opc1 = 1, + .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, + { .name = "PDR", .cp = 15, .crm = 12, .opc1 = 2, + .access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, + { .name = "CIDCR", .cp = 15, .crm = 14, .opc1 = 0, + .access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo cache_test_clean_cp_reginfo[] = { + /* The cache test-and-clean instructions always return (1 << 30) + * to indicate that there are no dirty cache lines. + */ + { .name = "TC_DCACHE", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 3, + .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW, + .resetvalue = (1 << 30) }, + { .name = "TCI_DCACHE", .cp = 15, .crn = 7, .crm = 14, .opc1 = 0, .opc2 = 3, + .access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_RAW, + .resetvalue = (1 << 30) }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo strongarm_cp_reginfo[] = { + /* Ignore ReadBuffer accesses */ + { .name = "C9_READBUFFER", .cp = 15, .crn = 9, + .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, + .access = PL1_RW, .resetvalue = 0, + .type = ARM_CP_CONST | ARM_CP_OVERRIDE | ARM_CP_NO_RAW }, + REGINFO_SENTINEL +}; + +static uint64_t mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + ARMCPU *cpu = ARM_CPU(arm_env_get_cpu(env)); + uint64_t mpidr = cpu->mp_affinity; + + if (arm_feature(env, ARM_FEATURE_V7MP)) { + mpidr |= (1U << 31); + /* Cores which are uniprocessor (non-coherent) + * but still implement the MP extensions set + * bit 30. (For instance, Cortex-R5). + */ + if (cpu->mp_is_up) { + mpidr |= (1u << 30); + } + } + return mpidr; +} + +static const ARMCPRegInfo mpidr_cp_reginfo[] = { + { .name = "MPIDR", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5, + .access = PL1_R, .readfn = mpidr_read, .type = ARM_CP_NO_RAW }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo lpae_cp_reginfo[] = { + /* NOP AMAIR0/1 */ + { .name = "AMAIR0", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 0, + .access = PL1_RW, .type = ARM_CP_CONST, + .resetvalue = 0 }, + /* AMAIR1 is mapped to AMAIR_EL1[63:32] */ + { .name = "AMAIR1", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 1, + .access = PL1_RW, .type = ARM_CP_CONST, + .resetvalue = 0 }, + { .name = "PAR", .cp = 15, .crm = 7, .opc1 = 0, + .access = PL1_RW, .type = ARM_CP_64BIT, .resetvalue = 0, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.par_s), + offsetof(CPUARMState, cp15.par_ns)} }, + { .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0, + .access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_ALIAS, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr0_s), + offsetof(CPUARMState, cp15.ttbr0_ns) }, + .writefn = vmsa_ttbr_write, }, + { .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1, + .access = PL1_RW, .type = ARM_CP_64BIT | ARM_CP_ALIAS, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr1_s), + offsetof(CPUARMState, cp15.ttbr1_ns) }, + .writefn = vmsa_ttbr_write, }, + REGINFO_SENTINEL +}; + +static uint64_t aa64_fpcr_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return vfp_get_fpcr(env); +} + +static void aa64_fpcr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + vfp_set_fpcr(env, value); +} + +static uint64_t aa64_fpsr_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return vfp_get_fpsr(env); +} + +static void aa64_fpsr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + vfp_set_fpsr(env, value); +} + +static CPAccessResult aa64_daif_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UMA)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +static void aa64_daif_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + env->daif = value & PSTATE_DAIF; +} + +static CPAccessResult aa64_cacheop_access(CPUARMState *env, + const ARMCPRegInfo *ri) +{ + /* Cache invalidate/clean: NOP, but EL0 must UNDEF unless + * SCTLR_EL1.UCI is set. + */ + if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UCI)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +/* See: D4.7.2 TLB maintenance requirements and the TLB maintenance instructions + * Page D4-1736 (DDI0487A.b) + */ + +static void tlbi_aa64_va_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Invalidate by VA (AArch64 version) */ + ARMCPU *cpu = arm_env_get_cpu(env); + uint64_t pageaddr = sextract64(value << 12, 0, 56); + + tlb_flush_page(CPU(cpu), pageaddr); +} + +static void tlbi_aa64_vaa_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Invalidate by VA, all ASIDs (AArch64 version) */ + ARMCPU *cpu = arm_env_get_cpu(env); + uint64_t pageaddr = sextract64(value << 12, 0, 56); + + tlb_flush_page(CPU(cpu), pageaddr); +} + +static void tlbi_aa64_asid_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Invalidate by ASID (AArch64 version) */ + ARMCPU *cpu = arm_env_get_cpu(env); + int asid = extract64(value, 48, 16); + tlb_flush(CPU(cpu), asid == 0); +} + +static void tlbi_aa64_va_is_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + CPUState *other_cs; + uint64_t pageaddr = sextract64(value << 12, 0, 56); + + CPU_FOREACH(other_cs) { + tlb_flush_page(other_cs, pageaddr); + } +} + +static void tlbi_aa64_vaa_is_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + CPUState *other_cs; + uint64_t pageaddr = sextract64(value << 12, 0, 56); + + CPU_FOREACH(other_cs) { + tlb_flush_page(other_cs, pageaddr); + } +} + +static void tlbi_aa64_asid_is_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + CPUState *other_cs; + int asid = extract64(value, 48, 16); + + CPU_FOREACH(other_cs) { + tlb_flush(other_cs, asid == 0); + } +} + +static CPAccessResult aa64_zva_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + /* We don't implement EL2, so the only control on DC ZVA is the + * bit in the SCTLR which can prohibit access for EL0. + */ + if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_DZE)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +static uint64_t aa64_dczid_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + int dzp_bit = 1 << 4; + + /* DZP indicates whether DC ZVA access is allowed */ + if (aa64_zva_access(env, NULL) == CP_ACCESS_OK) { + dzp_bit = 0; + } + return cpu->dcz_blocksize | dzp_bit; +} + +static CPAccessResult sp_el0_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + if (!(env->pstate & PSTATE_SP)) { + /* Access to SP_EL0 is undefined if it's being used as + * the stack pointer. + */ + return CP_ACCESS_TRAP_UNCATEGORIZED; + } + return CP_ACCESS_OK; +} + +static uint64_t spsel_read(CPUARMState *env, const ARMCPRegInfo *ri) +{ + return env->pstate & PSTATE_SP; +} + +static void spsel_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t val) +{ + update_spsel(env, val); +} + +static void sctlr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + if (raw_read(env, ri) == value) { + /* Skip the TLB flush if nothing actually changed; Linux likes + * to do a lot of pointless SCTLR writes. + */ + return; + } + + raw_write(env, ri, value); + /* ??? Lots of these bits are not implemented. */ + /* This may enable/disable the MMU, so do a TLB flush. */ + tlb_flush(CPU(cpu), 1); +} + +static const ARMCPRegInfo v8_cp_reginfo[] = { + /* Minimal set of EL0-visible registers. This will need to be expanded + * significantly for system emulation of AArch64 CPUs. + */ + { .name = "NZCV", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .opc2 = 0, .crn = 4, .crm = 2, + .access = PL0_RW, .type = ARM_CP_NZCV }, + { .name = "DAIF", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 4, .crm = 2, + .type = ARM_CP_NO_RAW, + .access = PL0_RW, .accessfn = aa64_daif_access, + .fieldoffset = offsetof(CPUARMState, daif), + .writefn = aa64_daif_write, .resetfn = arm_cp_reset_ignore }, + { .name = "FPCR", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .opc2 = 0, .crn = 4, .crm = 4, + .access = PL0_RW, .readfn = aa64_fpcr_read, .writefn = aa64_fpcr_write }, + { .name = "FPSR", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 4, .crm = 4, + .access = PL0_RW, .readfn = aa64_fpsr_read, .writefn = aa64_fpsr_write }, + { .name = "DCZID_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .opc2 = 7, .crn = 0, .crm = 0, + .access = PL0_R, .type = ARM_CP_NO_RAW, + .readfn = aa64_dczid_read }, + { .name = "DC_ZVA", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 4, .opc2 = 1, + .access = PL0_W, .type = ARM_CP_DC_ZVA, +#ifndef CONFIG_USER_ONLY + /* Avoid overhead of an access check that always passes in user-mode */ + .accessfn = aa64_zva_access, +#endif + }, + { .name = "CURRENTEL", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .opc2 = 2, .crn = 4, .crm = 2, + .access = PL1_R, .type = ARM_CP_CURRENTEL }, + /* Cache ops: all NOPs since we don't emulate caches */ + { .name = "IC_IALLUIS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 0, + .access = PL1_W, .type = ARM_CP_NOP }, + { .name = "IC_IALLU", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 0, + .access = PL1_W, .type = ARM_CP_NOP }, + { .name = "IC_IVAU", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 5, .opc2 = 1, + .access = PL0_W, .type = ARM_CP_NOP, + .accessfn = aa64_cacheop_access }, + { .name = "DC_IVAC", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 1, + .access = PL1_W, .type = ARM_CP_NOP }, + { .name = "DC_ISW", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 2, + .access = PL1_W, .type = ARM_CP_NOP }, + { .name = "DC_CVAC", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 10, .opc2 = 1, + .access = PL0_W, .type = ARM_CP_NOP, + .accessfn = aa64_cacheop_access }, + { .name = "DC_CSW", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 2, + .access = PL1_W, .type = ARM_CP_NOP }, + { .name = "DC_CVAU", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 11, .opc2 = 1, + .access = PL0_W, .type = ARM_CP_NOP, + .accessfn = aa64_cacheop_access }, + { .name = "DC_CIVAC", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 14, .opc2 = 1, + .access = PL0_W, .type = ARM_CP_NOP, + .accessfn = aa64_cacheop_access }, + { .name = "DC_CISW", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 2, + .access = PL1_W, .type = ARM_CP_NOP }, + /* TLBI operations */ + { .name = "TLBI_ALLE1", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 4, + .access = PL2_W, .type = ARM_CP_NO_RAW, + .writefn = tlbiall_write }, + { .name = "TLBI_ALLE1IS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 4, + .access = PL2_W, .type = ARM_CP_NO_RAW, + .writefn = tlbiall_is_write }, + { .name = "TLBI_VMALLE1IS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 0, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbiall_is_write }, + { .name = "TLBI_VAE1IS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 1, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_va_is_write }, + { .name = "TLBI_ASIDE1IS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 2, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_asid_is_write }, + { .name = "TLBI_VAAE1IS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 3, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_vaa_is_write }, + { .name = "TLBI_VALE1IS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 5, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_va_is_write }, + { .name = "TLBI_VAALE1IS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 7, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_vaa_is_write }, + { .name = "TLBI_VMALLE1", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 0, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbiall_write }, + { .name = "TLBI_VAE1", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 1, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_va_write }, + { .name = "TLBI_ASIDE1", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 2, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_asid_write }, + { .name = "TLBI_VAAE1", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 3, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_vaa_write }, + { .name = "TLBI_VALE1", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 5, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_va_write }, + { .name = "TLBI_VAALE1", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 7, + .access = PL1_W, .type = ARM_CP_NO_RAW, + .writefn = tlbi_aa64_vaa_write }, +#ifndef CONFIG_USER_ONLY + /* 64 bit address translation operations */ + { .name = "AT_S1E1R", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 0, + .access = PL1_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 }, + { .name = "AT_S1E1W", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 1, + .access = PL1_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 }, + { .name = "AT_S1E0R", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 2, + .access = PL1_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 }, + { .name = "AT_S1E0W", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 0, .crn = 7, .crm = 8, .opc2 = 3, + .access = PL1_W, .type = ARM_CP_NO_RAW, .writefn = ats_write64 }, +#endif + /* TLB invalidate last level of translation table walk */ + { .name = "TLBIMVALIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 5, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_is_write }, + { .name = "TLBIMVAALIS", .cp = 15, .opc1 = 0, .crn = 8, .crm = 3, .opc2 = 7, + .type = ARM_CP_NO_RAW, .access = PL1_W, + .writefn = tlbimvaa_is_write }, + { .name = "TLBIMVAL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 5, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimva_write }, + { .name = "TLBIMVAAL", .cp = 15, .opc1 = 0, .crn = 8, .crm = 7, .opc2 = 7, + .type = ARM_CP_NO_RAW, .access = PL1_W, .writefn = tlbimvaa_write }, + /* 32 bit cache operations */ + { .name = "ICIALLUIS", .cp = 15, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 0, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "BPIALLUIS", .cp = 15, .opc1 = 0, .crn = 7, .crm = 1, .opc2 = 6, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "ICIALLU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 0, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "ICIMVAU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 1, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "BPIALL", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 6, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "BPIMVA", .cp = 15, .opc1 = 0, .crn = 7, .crm = 5, .opc2 = 7, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "DCIMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 1, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "DCISW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 6, .opc2 = 2, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "DCCMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 1, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "DCCSW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 10, .opc2 = 2, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "DCCMVAU", .cp = 15, .opc1 = 0, .crn = 7, .crm = 11, .opc2 = 1, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "DCCIMVAC", .cp = 15, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 1, + .type = ARM_CP_NOP, .access = PL1_W }, + { .name = "DCCISW", .cp = 15, .opc1 = 0, .crn = 7, .crm = 14, .opc2 = 2, + .type = ARM_CP_NOP, .access = PL1_W }, + /* MMU Domain access control / MPU write buffer control */ + { .name = "DACR", .cp = 15, .opc1 = 0, .crn = 3, .crm = 0, .opc2 = 0, + .access = PL1_RW, .resetvalue = 0, + .writefn = dacr_write, .raw_writefn = raw_write, + .bank_fieldoffsets = { offsetoflow32(CPUARMState, cp15.dacr_s), + offsetoflow32(CPUARMState, cp15.dacr_ns) } }, + { .name = "ELR_EL1", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, + .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 1, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, elr_el[1]) }, + { .name = "SPSR_EL1", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, + .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 0, + .access = PL1_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[1]) }, + /* We rely on the access checks not allowing the guest to write to the + * state field when SPSel indicates that it's being used as the stack + * pointer. + */ + { .name = "SP_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 1, .opc2 = 0, + .access = PL1_RW, .accessfn = sp_el0_access, + .type = ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, sp_el[0]) }, + { .name = "SP_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 4, .crm = 1, .opc2 = 0, + .access = PL2_RW, .type = ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, sp_el[1]) }, + { .name = "SPSel", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 4, .crm = 2, .opc2 = 0, + .type = ARM_CP_NO_RAW, + .access = PL1_RW, .readfn = spsel_read, .writefn = spsel_write }, + REGINFO_SENTINEL +}; + +/* Used to describe the behaviour of EL2 regs when EL2 does not exist. */ +static const ARMCPRegInfo el3_no_el2_cp_reginfo[] = { + { .name = "VBAR_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0, + .access = PL2_RW, + .readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore }, + { .name = "HCR_EL2", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_NO_RAW, + .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0, + .access = PL2_RW, + .readfn = arm_cp_read_zero, .writefn = arm_cp_write_ignore }, + { .name = "CPTR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 2, + .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "MAIR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 10, .crm = 2, .opc2 = 0, + .access = PL2_RW, .type = ARM_CP_CONST, + .resetvalue = 0 }, + { .name = "HMAIR1", .state = ARM_CP_STATE_AA32, + .opc1 = 4, .crn = 10, .crm = 2, .opc2 = 1, + .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "TCR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 2, + .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "SCTLR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 0, + .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "TPIDR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 2, + .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "TTBR0_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 0, + .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "HTTBR", .cp = 15, .opc1 = 4, .crm = 2, + .access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_CONST, + .resetvalue = 0 }, + REGINFO_SENTINEL +}; + +static void hcr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + uint64_t valid_mask = HCR_MASK; + + if (arm_feature(env, ARM_FEATURE_EL3)) { + valid_mask &= ~HCR_HCD; + } else { + valid_mask &= ~HCR_TSC; + } + + /* Clear RES0 bits. */ + value &= valid_mask; + + /* These bits change the MMU setup: + * HCR_VM enables stage 2 translation + * HCR_PTW forbids certain page-table setups + * HCR_DC Disables stage1 and enables stage2 translation + */ + if ((raw_read(env, ri) ^ value) & (HCR_VM | HCR_PTW | HCR_DC)) { + tlb_flush(CPU(cpu), 1); + } + raw_write(env, ri, value); +} + +static const ARMCPRegInfo el2_cp_reginfo[] = { + { .name = "HCR_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 0, + .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.hcr_el2), + .writefn = hcr_write }, + { .name = "DACR32_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 3, .crm = 0, .opc2 = 0, + .access = PL2_RW, .resetvalue = 0, + .writefn = dacr_write, .raw_writefn = raw_write, + .fieldoffset = offsetof(CPUARMState, cp15.dacr32_el2) }, + { .name = "ELR_EL2", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, + .opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 1, + .access = PL2_RW, + .fieldoffset = offsetof(CPUARMState, elr_el[2]) }, + { .name = "ESR_EL2", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, + .opc0 = 3, .opc1 = 4, .crn = 5, .crm = 2, .opc2 = 0, + .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.esr_el[2]) }, + { .name = "IFSR32_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 5, .crm = 0, .opc2 = 1, + .access = PL2_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.ifsr32_el2) }, + { .name = "FAR_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 6, .crm = 0, .opc2 = 0, + .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el[2]) }, + { .name = "SPSR_EL2", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, + .opc0 = 3, .opc1 = 4, .crn = 4, .crm = 0, .opc2 = 0, + .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[6]) }, + { .name = "VBAR_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 0, + .access = PL2_RW, .writefn = vbar_write, + .fieldoffset = offsetof(CPUARMState, cp15.vbar_el[2]), + .resetvalue = 0 }, + { .name = "SP_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 4, .crm = 1, .opc2 = 0, + .access = PL3_RW, .type = ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, sp_el[2]) }, + { .name = "CPTR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 1, .opc2 = 2, + .access = PL2_RW, .accessfn = cptr_access, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.cptr_el[2]) }, + { .name = "MAIR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 10, .crm = 2, .opc2 = 0, + .access = PL2_RW, .fieldoffset = offsetof(CPUARMState, cp15.mair_el[2]), + .resetvalue = 0 }, + { .name = "HMAIR1", .state = ARM_CP_STATE_AA32, + .opc1 = 4, .crn = 10, .crm = 2, .opc2 = 1, + .access = PL2_RW, .type = ARM_CP_ALIAS, + .fieldoffset = offsetofhigh32(CPUARMState, cp15.mair_el[2]) }, + { .name = "TCR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 2, + .access = PL2_RW, .writefn = vmsa_tcr_el1_write, + .resetfn = vmsa_ttbcr_reset, .raw_writefn = raw_write, + .fieldoffset = offsetof(CPUARMState, cp15.tcr_el[2]) }, + { .name = "SCTLR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 0, + .access = PL2_RW, .raw_writefn = raw_write, .writefn = sctlr_write, + .fieldoffset = offsetof(CPUARMState, cp15.sctlr_el[2]) }, + { .name = "TPIDR_EL2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 2, + .access = PL2_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.tpidr_el[2]) }, + { .name = "TTBR0_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 0, .opc2 = 0, + .access = PL2_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el[2]) }, + { .name = "HTTBR", .cp = 15, .opc1 = 4, .crm = 2, + .access = PL2_RW, .type = ARM_CP_64BIT | ARM_CP_ALIAS, + .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el[2]) }, + { .name = "TLBI_ALLE2", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 0, + .type = ARM_CP_NO_RAW, .access = PL2_W, + .writefn = tlbiall_write }, + { .name = "TLBI_VAE2", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 4, .crn = 8, .crm = 7, .opc2 = 1, + .type = ARM_CP_NO_RAW, .access = PL2_W, + .writefn = tlbi_aa64_vaa_write }, + { .name = "TLBI_VAE2IS", .state = ARM_CP_STATE_AA64, + .opc0 = 1, .opc1 = 4, .crn = 8, .crm = 3, .opc2 = 1, + .type = ARM_CP_NO_RAW, .access = PL2_W, + .writefn = tlbi_aa64_vaa_write }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo el3_cp_reginfo[] = { + { .name = "SCR_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 0, + .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.scr_el3), + .resetvalue = 0, .writefn = scr_write }, + { .name = "SCR", .type = ARM_CP_ALIAS, + .cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 0, + .access = PL3_RW, .fieldoffset = offsetoflow32(CPUARMState, cp15.scr_el3), + .writefn = scr_write }, + { .name = "SDER32_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 1, + .access = PL3_RW, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.sder) }, + { .name = "SDER", + .cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 1, + .access = PL3_RW, .resetvalue = 0, + .fieldoffset = offsetoflow32(CPUARMState, cp15.sder) }, + /* TODO: Implement NSACR trapping of secure EL1 accesses to EL3 */ + { .name = "NSACR", .cp = 15, .opc1 = 0, .crn = 1, .crm = 1, .opc2 = 2, + .access = PL3_W | PL1_R, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.nsacr) }, + { .name = "MVBAR", .cp = 15, .opc1 = 0, .crn = 12, .crm = 0, .opc2 = 1, + .access = PL3_RW, .writefn = vbar_write, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.mvbar) }, + { .name = "SCTLR_EL3", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, /* reset handled by AArch32 view */ + .opc0 = 3, .opc1 = 6, .crn = 1, .crm = 0, .opc2 = 0, + .access = PL3_RW, .raw_writefn = raw_write, .writefn = sctlr_write, + .fieldoffset = offsetof(CPUARMState, cp15.sctlr_el[3]) }, + { .name = "TTBR0_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 2, .crm = 0, .opc2 = 0, + .access = PL3_RW, .writefn = vmsa_ttbr_write, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.ttbr0_el[3]) }, + { .name = "TCR_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 2, .crm = 0, .opc2 = 2, + .access = PL3_RW, .writefn = vmsa_tcr_el1_write, + .resetfn = vmsa_ttbcr_reset, .raw_writefn = raw_write, + .fieldoffset = offsetof(CPUARMState, cp15.tcr_el[3]) }, + { .name = "ELR_EL3", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, + .opc0 = 3, .opc1 = 6, .crn = 4, .crm = 0, .opc2 = 1, + .access = PL3_RW, + .fieldoffset = offsetof(CPUARMState, elr_el[3]) }, + { .name = "ESR_EL3", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, + .opc0 = 3, .opc1 = 6, .crn = 5, .crm = 2, .opc2 = 0, + .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.esr_el[3]) }, + { .name = "FAR_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 6, .crm = 0, .opc2 = 0, + .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.far_el[3]) }, + { .name = "SPSR_EL3", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_ALIAS, + .opc0 = 3, .opc1 = 6, .crn = 4, .crm = 0, .opc2 = 0, + .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, banked_spsr[7]) }, + { .name = "VBAR_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 12, .crm = 0, .opc2 = 0, + .access = PL3_RW, .writefn = vbar_write, + .fieldoffset = offsetof(CPUARMState, cp15.vbar_el[3]), + .resetvalue = 0 }, + { .name = "CPTR_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 1, .crm = 1, .opc2 = 2, + .access = PL3_RW, .accessfn = cptr_access, .resetvalue = 0, + .fieldoffset = offsetof(CPUARMState, cp15.cptr_el[3]) }, + REGINFO_SENTINEL +}; + +static CPAccessResult ctr_el0_access(CPUARMState *env, const ARMCPRegInfo *ri) +{ + /* Only accessible in EL0 if SCTLR.UCT is set (and only in AArch64, + * but the AArch32 CTR has its own reginfo struct) + */ + if (arm_current_el(env) == 0 && !(env->cp15.sctlr_el[1] & SCTLR_UCT)) { + return CP_ACCESS_TRAP; + } + return CP_ACCESS_OK; +} + +static const ARMCPRegInfo debug_cp_reginfo[] = { + /* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped + * debug components. The AArch64 version of DBGDRAR is named MDRAR_EL1; + * unlike DBGDRAR it is never accessible from EL0. + * DBGDSAR is deprecated and must RAZ from v8 anyway, so it has no AArch64 + * accessor. + */ + { .name = "DBGDRAR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "MDRAR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "DBGDSAR", .cp = 14, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + /* Monitor debug system control register; the 32-bit alias is DBGDSCRext. */ + { .name = "MDSCR_EL1", .state = ARM_CP_STATE_BOTH, + .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 2, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.mdscr_el1), + .resetvalue = 0 }, + /* MDCCSR_EL0, aka DBGDSCRint. This is a read-only mirror of MDSCR_EL1. + * We don't implement the configurable EL0 access. + */ + { .name = "MDCCSR_EL0", .state = ARM_CP_STATE_BOTH, + .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 0, + .type = ARM_CP_ALIAS, + .access = PL1_R, + .fieldoffset = offsetof(CPUARMState, cp15.mdscr_el1), }, + /* We define a dummy WI OSLAR_EL1, because Linux writes to it. */ + { .name = "OSLAR_EL1", .state = ARM_CP_STATE_BOTH, + .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 4, + .access = PL1_W, .type = ARM_CP_NOP }, + /* Dummy OSDLR_EL1: 32-bit Linux will read this */ + { .name = "OSDLR_EL1", .state = ARM_CP_STATE_BOTH, + .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 1, .crm = 3, .opc2 = 4, + .access = PL1_RW, .type = ARM_CP_NOP }, + /* Dummy DBGVCR: Linux wants to clear this on startup, but we don't + * implement vector catch debug events yet. + */ + { .name = "DBGVCR", + .cp = 14, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 0, + .access = PL1_RW, .type = ARM_CP_NOP }, + REGINFO_SENTINEL +}; + +static const ARMCPRegInfo debug_lpae_cp_reginfo[] = { + /* 64 bit access versions of the (dummy) debug registers */ + { .name = "DBGDRAR", .cp = 14, .crm = 1, .opc1 = 0, + .access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 }, + { .name = "DBGDSAR", .cp = 14, .crm = 2, .opc1 = 0, + .access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 }, + REGINFO_SENTINEL +}; + +void hw_watchpoint_update(ARMCPU *cpu, int n) +{ + CPUARMState *env = &cpu->env; + vaddr len = 0; + vaddr wvr = env->cp15.dbgwvr[n]; + uint64_t wcr = env->cp15.dbgwcr[n]; + int mask; + int flags = BP_CPU | BP_STOP_BEFORE_ACCESS; + + if (env->cpu_watchpoint[n]) { + cpu_watchpoint_remove_by_ref(CPU(cpu), env->cpu_watchpoint[n]); + env->cpu_watchpoint[n] = NULL; + } + + if (!extract64(wcr, 0, 1)) { + /* E bit clear : watchpoint disabled */ + return; + } + + switch (extract64(wcr, 3, 2)) { + case 0: + /* LSC 00 is reserved and must behave as if the wp is disabled */ + return; + case 1: + flags |= BP_MEM_READ; + break; + case 2: + flags |= BP_MEM_WRITE; + break; + case 3: + flags |= BP_MEM_ACCESS; + break; + } + + /* Attempts to use both MASK and BAS fields simultaneously are + * CONSTRAINED UNPREDICTABLE; we opt to ignore BAS in this case, + * thus generating a watchpoint for every byte in the masked region. + */ + mask = extract64(wcr, 24, 4); + if (mask == 1 || mask == 2) { + /* Reserved values of MASK; we must act as if the mask value was + * some non-reserved value, or as if the watchpoint were disabled. + * We choose the latter. + */ + return; + } else if (mask) { + /* Watchpoint covers an aligned area up to 2GB in size */ + len = 1ULL << mask; + /* If masked bits in WVR are not zero it's CONSTRAINED UNPREDICTABLE + * whether the watchpoint fires when the unmasked bits match; we opt + * to generate the exceptions. + */ + wvr &= ~(len - 1); + } else { + /* Watchpoint covers bytes defined by the byte address select bits */ + int bas = extract64(wcr, 5, 8); + int basstart; + + if (bas == 0) { + /* This must act as if the watchpoint is disabled */ + return; + } + + if (extract64(wvr, 2, 1)) { + /* Deprecated case of an only 4-aligned address. BAS[7:4] are + * ignored, and BAS[3:0] define which bytes to watch. + */ + bas &= 0xf; + } + /* The BAS bits are supposed to be programmed to indicate a contiguous + * range of bytes. Otherwise it is CONSTRAINED UNPREDICTABLE whether + * we fire for each byte in the word/doubleword addressed by the WVR. + * We choose to ignore any non-zero bits after the first range of 1s. + */ + basstart = ctz32(bas); + len = cto32(bas >> basstart); + wvr += basstart; + } + + cpu_watchpoint_insert(CPU(cpu), wvr, len, flags, + &env->cpu_watchpoint[n]); +} + +void hw_watchpoint_update_all(ARMCPU *cpu) +{ + int i; + CPUARMState *env = &cpu->env; + + /* Completely clear out existing QEMU watchpoints and our array, to + * avoid possible stale entries following migration load. + */ + cpu_watchpoint_remove_all(CPU(cpu), BP_CPU); + memset(env->cpu_watchpoint, 0, sizeof(env->cpu_watchpoint)); + + for (i = 0; i < ARRAY_SIZE(cpu->env.cpu_watchpoint); i++) { + hw_watchpoint_update(cpu, i); + } +} + +static void dbgwvr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + int i = ri->crm; + + /* Bits [63:49] are hardwired to the value of bit [48]; that is, the + * register reads and behaves as if values written are sign extended. + * Bits [1:0] are RES0. + */ + value = sextract64(value, 0, 49) & ~3ULL; + + raw_write(env, ri, value); + hw_watchpoint_update(cpu, i); +} + +static void dbgwcr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + int i = ri->crm; + + raw_write(env, ri, value); + hw_watchpoint_update(cpu, i); +} + +void hw_breakpoint_update(ARMCPU *cpu, int n) +{ + CPUARMState *env = &cpu->env; + uint64_t bvr = env->cp15.dbgbvr[n]; + uint64_t bcr = env->cp15.dbgbcr[n]; + vaddr addr; + int bt; + int flags = BP_CPU; + + if (env->cpu_breakpoint[n]) { + cpu_breakpoint_remove_by_ref(CPU(cpu), env->cpu_breakpoint[n]); + env->cpu_breakpoint[n] = NULL; + } + + if (!extract64(bcr, 0, 1)) { + /* E bit clear : watchpoint disabled */ + return; + } + + bt = extract64(bcr, 20, 4); + + switch (bt) { + case 4: /* unlinked address mismatch (reserved if AArch64) */ + case 5: /* linked address mismatch (reserved if AArch64) */ + qemu_log_mask(LOG_UNIMP, + "arm: address mismatch breakpoint types not implemented"); + return; + case 0: /* unlinked address match */ + case 1: /* linked address match */ + { + /* Bits [63:49] are hardwired to the value of bit [48]; that is, + * we behave as if the register was sign extended. Bits [1:0] are + * RES0. The BAS field is used to allow setting breakpoints on 16 + * bit wide instructions; it is CONSTRAINED UNPREDICTABLE whether + * a bp will fire if the addresses covered by the bp and the addresses + * covered by the insn overlap but the insn doesn't start at the + * start of the bp address range. We choose to require the insn and + * the bp to have the same address. The constraints on writing to + * BAS enforced in dbgbcr_write mean we have only four cases: + * 0b0000 => no breakpoint + * 0b0011 => breakpoint on addr + * 0b1100 => breakpoint on addr + 2 + * 0b1111 => breakpoint on addr + * See also figure D2-3 in the v8 ARM ARM (DDI0487A.c). + */ + int bas = extract64(bcr, 5, 4); + addr = sextract64(bvr, 0, 49) & ~3ULL; + if (bas == 0) { + return; + } + if (bas == 0xc) { + addr += 2; + } + break; + } + case 2: /* unlinked context ID match */ + case 8: /* unlinked VMID match (reserved if no EL2) */ + case 10: /* unlinked context ID and VMID match (reserved if no EL2) */ + qemu_log_mask(LOG_UNIMP, + "arm: unlinked context breakpoint types not implemented"); + return; + case 9: /* linked VMID match (reserved if no EL2) */ + case 11: /* linked context ID and VMID match (reserved if no EL2) */ + case 3: /* linked context ID match */ + default: + /* We must generate no events for Linked context matches (unless + * they are linked to by some other bp/wp, which is handled in + * updates for the linking bp/wp). We choose to also generate no events + * for reserved values. + */ + return; + } + + cpu_breakpoint_insert(CPU(cpu), addr, flags, &env->cpu_breakpoint[n]); +} + +void hw_breakpoint_update_all(ARMCPU *cpu) +{ + int i; + CPUARMState *env = &cpu->env; + + /* Completely clear out existing QEMU breakpoints and our array, to + * avoid possible stale entries following migration load. + */ + cpu_breakpoint_remove_all(CPU(cpu), BP_CPU); + memset(env->cpu_breakpoint, 0, sizeof(env->cpu_breakpoint)); + + for (i = 0; i < ARRAY_SIZE(cpu->env.cpu_breakpoint); i++) { + hw_breakpoint_update(cpu, i); + } +} + +static void dbgbvr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + int i = ri->crm; + + raw_write(env, ri, value); + hw_breakpoint_update(cpu, i); +} + +static void dbgbcr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + int i = ri->crm; + + /* BAS[3] is a read-only copy of BAS[2], and BAS[1] a read-only + * copy of BAS[0]. + */ + value = deposit64(value, 6, 1, extract64(value, 5, 1)); + value = deposit64(value, 8, 1, extract64(value, 7, 1)); + + raw_write(env, ri, value); + hw_breakpoint_update(cpu, i); +} + +static void define_debug_regs(ARMCPU *cpu) +{ + /* Define v7 and v8 architectural debug registers. + * These are just dummy implementations for now. + */ + int i; + int wrps, brps, ctx_cmps; + ARMCPRegInfo dbgdidr = { + .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0, + .access = PL0_R, .type = ARM_CP_CONST, .resetvalue = cpu->dbgdidr, + }; + + /* Note that all these register fields hold "number of Xs minus 1". */ + brps = extract32(cpu->dbgdidr, 24, 4); + wrps = extract32(cpu->dbgdidr, 28, 4); + ctx_cmps = extract32(cpu->dbgdidr, 20, 4); + + assert(ctx_cmps <= brps); + + /* The DBGDIDR and ID_AA64DFR0_EL1 define various properties + * of the debug registers such as number of breakpoints; + * check that if they both exist then they agree. + */ + if (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)) { + assert(extract32(cpu->id_aa64dfr0, 12, 4) == brps); + assert(extract32(cpu->id_aa64dfr0, 20, 4) == wrps); + assert(extract32(cpu->id_aa64dfr0, 28, 4) == ctx_cmps); + } + + define_one_arm_cp_reg(cpu, &dbgdidr); + define_arm_cp_regs(cpu, debug_cp_reginfo); + + if (arm_feature(&cpu->env, ARM_FEATURE_LPAE)) { + define_arm_cp_regs(cpu, debug_lpae_cp_reginfo); + } + + for (i = 0; i < brps + 1; i++) { + ARMCPRegInfo dbgregs[] = { + { .name = "DBGBVR", .state = ARM_CP_STATE_BOTH, + .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 4, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.dbgbvr[i]), + .writefn = dbgbvr_write, .raw_writefn = raw_write + }, + { .name = "DBGBCR", .state = ARM_CP_STATE_BOTH, + .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 5, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.dbgbcr[i]), + .writefn = dbgbcr_write, .raw_writefn = raw_write + }, + REGINFO_SENTINEL + }; + define_arm_cp_regs(cpu, dbgregs); + } + + for (i = 0; i < wrps + 1; i++) { + ARMCPRegInfo dbgregs[] = { + { .name = "DBGWVR", .state = ARM_CP_STATE_BOTH, + .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 6, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.dbgwvr[i]), + .writefn = dbgwvr_write, .raw_writefn = raw_write + }, + { .name = "DBGWCR", .state = ARM_CP_STATE_BOTH, + .cp = 14, .opc0 = 2, .opc1 = 0, .crn = 0, .crm = i, .opc2 = 7, + .access = PL1_RW, + .fieldoffset = offsetof(CPUARMState, cp15.dbgwcr[i]), + .writefn = dbgwcr_write, .raw_writefn = raw_write + }, + REGINFO_SENTINEL + }; + define_arm_cp_regs(cpu, dbgregs); + } +} + +void register_cp_regs_for_features(ARMCPU *cpu) +{ + /* Register all the coprocessor registers based on feature bits */ + CPUARMState *env = &cpu->env; + if (arm_feature(env, ARM_FEATURE_M)) { + /* M profile has no coprocessor registers */ + return; + } + + define_arm_cp_regs(cpu, cp_reginfo); + if (!arm_feature(env, ARM_FEATURE_V8)) { + /* Must go early as it is full of wildcards that may be + * overridden by later definitions. + */ + define_arm_cp_regs(cpu, not_v8_cp_reginfo); + } + + if (arm_feature(env, ARM_FEATURE_V6)) { + /* The ID registers all have impdef reset values */ + ARMCPRegInfo v6_idregs[] = { + { .name = "ID_PFR0", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_pfr0 }, + { .name = "ID_PFR1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_pfr1 }, + { .name = "ID_DFR0", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 2, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_dfr0 }, + { .name = "ID_AFR0", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 3, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_afr0 }, + { .name = "ID_MMFR0", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 4, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_mmfr0 }, + { .name = "ID_MMFR1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 5, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_mmfr1 }, + { .name = "ID_MMFR2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 6, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_mmfr2 }, + { .name = "ID_MMFR3", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 1, .opc2 = 7, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_mmfr3 }, + { .name = "ID_ISAR0", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_isar0 }, + { .name = "ID_ISAR1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_isar1 }, + { .name = "ID_ISAR2", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 2, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_isar2 }, + { .name = "ID_ISAR3", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 3, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_isar3 }, + { .name = "ID_ISAR4", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 4, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_isar4 }, + { .name = "ID_ISAR5", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 5, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_isar5 }, + /* 6..7 are as yet unallocated and must RAZ */ + { .name = "ID_ISAR6", .cp = 15, .crn = 0, .crm = 2, + .opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = 0 }, + { .name = "ID_ISAR7", .cp = 15, .crn = 0, .crm = 2, + .opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = 0 }, + REGINFO_SENTINEL + }; + define_arm_cp_regs(cpu, v6_idregs); + define_arm_cp_regs(cpu, v6_cp_reginfo); + } else { + define_arm_cp_regs(cpu, not_v6_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_V6K)) { + define_arm_cp_regs(cpu, v6k_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_V7MP) && + !arm_feature(env, ARM_FEATURE_MPU)) { + define_arm_cp_regs(cpu, v7mp_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_V7)) { + /* v7 performance monitor control register: same implementor + * field as main ID register, and we implement only the cycle + * count register. + */ +#ifndef CONFIG_USER_ONLY + ARMCPRegInfo pmcr = { + .name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0, + .access = PL0_RW, + .type = ARM_CP_IO | ARM_CP_ALIAS, + .fieldoffset = offsetoflow32(CPUARMState, cp15.c9_pmcr), + .accessfn = pmreg_access, .writefn = pmcr_write, + .raw_writefn = raw_write, + }; + ARMCPRegInfo pmcr64 = { + .name = "PMCR_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .crn = 9, .crm = 12, .opc2 = 0, + .access = PL0_RW, .accessfn = pmreg_access, + .type = ARM_CP_IO, + .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcr), + .resetvalue = cpu->midr & 0xff000000, + .writefn = pmcr_write, .raw_writefn = raw_write, + }; + define_one_arm_cp_reg(cpu, &pmcr); + define_one_arm_cp_reg(cpu, &pmcr64); +#endif + ARMCPRegInfo clidr = { + .name = "CLIDR", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->clidr + }; + define_one_arm_cp_reg(cpu, &clidr); + define_arm_cp_regs(cpu, v7_cp_reginfo); + define_debug_regs(cpu); + } else { + define_arm_cp_regs(cpu, not_v7_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_V8)) { + /* AArch64 ID registers, which all have impdef reset values */ + ARMCPRegInfo v8_idregs[] = { + { .name = "ID_AA64PFR0_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64pfr0 }, + { .name = "ID_AA64PFR1_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 4, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64pfr1}, + { .name = "ID_AA64DFR0_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, + /* We mask out the PMUVer field, because we don't currently + * implement the PMU. Not advertising it prevents the guest + * from trying to use it and getting UNDEFs on registers we + * don't implement. + */ + .resetvalue = cpu->id_aa64dfr0 & ~0xf00 }, + { .name = "ID_AA64DFR1_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64dfr1 }, + { .name = "ID_AA64AFR0_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 4, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64afr0 }, + { .name = "ID_AA64AFR1_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 5, .opc2 = 5, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64afr1 }, + { .name = "ID_AA64ISAR0_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64isar0 }, + { .name = "ID_AA64ISAR1_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64isar1 }, + { .name = "ID_AA64MMFR0_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64mmfr0 }, + { .name = "ID_AA64MMFR1_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->id_aa64mmfr1 }, + { .name = "MVFR0_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->mvfr0 }, + { .name = "MVFR1_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->mvfr1 }, + { .name = "MVFR2_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 3, .opc2 = 2, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->mvfr2 }, + REGINFO_SENTINEL + }; + /* RVBAR_EL1 is only implemented if EL1 is the highest EL */ + if (!arm_feature(env, ARM_FEATURE_EL3) && + !arm_feature(env, ARM_FEATURE_EL2)) { + ARMCPRegInfo rvbar = { + .name = "RVBAR_EL1", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 0, .crn = 12, .crm = 0, .opc2 = 1, + .type = ARM_CP_CONST, .access = PL1_R, .resetvalue = cpu->rvbar + }; + define_one_arm_cp_reg(cpu, &rvbar); + } + define_arm_cp_regs(cpu, v8_idregs); + define_arm_cp_regs(cpu, v8_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_EL2)) { + define_arm_cp_regs(cpu, el2_cp_reginfo); + /* RVBAR_EL2 is only implemented if EL2 is the highest EL */ + if (!arm_feature(env, ARM_FEATURE_EL3)) { + ARMCPRegInfo rvbar = { + .name = "RVBAR_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 12, .crm = 0, .opc2 = 1, + .type = ARM_CP_CONST, .access = PL2_R, .resetvalue = cpu->rvbar + }; + define_one_arm_cp_reg(cpu, &rvbar); + } + } else { + /* If EL2 is missing but higher ELs are enabled, we need to + * register the no_el2 reginfos. + */ + if (arm_feature(env, ARM_FEATURE_EL3)) { + define_arm_cp_regs(cpu, el3_no_el2_cp_reginfo); + } + } + if (arm_feature(env, ARM_FEATURE_EL3)) { + define_arm_cp_regs(cpu, el3_cp_reginfo); + ARMCPRegInfo rvbar = { + .name = "RVBAR_EL3", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 6, .crn = 12, .crm = 0, .opc2 = 1, + .type = ARM_CP_CONST, .access = PL3_R, .resetvalue = cpu->rvbar + }; + define_one_arm_cp_reg(cpu, &rvbar); + } + if (arm_feature(env, ARM_FEATURE_MPU)) { + if (arm_feature(env, ARM_FEATURE_V6)) { + /* PMSAv6 not implemented */ + assert(arm_feature(env, ARM_FEATURE_V7)); + define_arm_cp_regs(cpu, vmsa_pmsa_cp_reginfo); + define_arm_cp_regs(cpu, pmsav7_cp_reginfo); + } else { + define_arm_cp_regs(cpu, pmsav5_cp_reginfo); + } + } else { + define_arm_cp_regs(cpu, vmsa_pmsa_cp_reginfo); + define_arm_cp_regs(cpu, vmsa_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_THUMB2EE)) { + define_arm_cp_regs(cpu, t2ee_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) { + define_arm_cp_regs(cpu, generic_timer_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_VAPA)) { + define_arm_cp_regs(cpu, vapa_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) { + define_arm_cp_regs(cpu, cache_test_clean_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_CACHE_DIRTY_REG)) { + define_arm_cp_regs(cpu, cache_dirty_status_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_CACHE_BLOCK_OPS)) { + define_arm_cp_regs(cpu, cache_block_ops_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_OMAPCP)) { + define_arm_cp_regs(cpu, omap_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_STRONGARM)) { + define_arm_cp_regs(cpu, strongarm_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_XSCALE)) { + define_arm_cp_regs(cpu, xscale_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_DUMMY_C15_REGS)) { + define_arm_cp_regs(cpu, dummy_c15_cp_reginfo); + } + if (arm_feature(env, ARM_FEATURE_LPAE)) { + define_arm_cp_regs(cpu, lpae_cp_reginfo); + } + /* Slightly awkwardly, the OMAP and StrongARM cores need all of + * cp15 crn=0 to be writes-ignored, whereas for other cores they should + * be read-only (ie write causes UNDEF exception). + */ + { + ARMCPRegInfo id_pre_v8_midr_cp_reginfo[] = { + /* Pre-v8 MIDR space. + * Note that the MIDR isn't a simple constant register because + * of the TI925 behaviour where writes to another register can + * cause the MIDR value to change. + * + * Unimplemented registers in the c15 0 0 0 space default to + * MIDR. Define MIDR first as this entire space, then CTR, TCMTR + * and friends override accordingly. + */ + { .name = "MIDR", + .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY, + .access = PL1_R, .resetvalue = cpu->midr, + .writefn = arm_cp_write_ignore, .raw_writefn = raw_write, + .fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid), + .type = ARM_CP_OVERRIDE }, + /* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */ + { .name = "DUMMY", + .cp = 15, .crn = 0, .crm = 3, .opc1 = 0, .opc2 = CP_ANY, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "DUMMY", + .cp = 15, .crn = 0, .crm = 4, .opc1 = 0, .opc2 = CP_ANY, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "DUMMY", + .cp = 15, .crn = 0, .crm = 5, .opc1 = 0, .opc2 = CP_ANY, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "DUMMY", + .cp = 15, .crn = 0, .crm = 6, .opc1 = 0, .opc2 = CP_ANY, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "DUMMY", + .cp = 15, .crn = 0, .crm = 7, .opc1 = 0, .opc2 = CP_ANY, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + REGINFO_SENTINEL + }; + ARMCPRegInfo id_v8_midr_cp_reginfo[] = { + { .name = "MIDR_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 0, .opc2 = 0, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->midr }, + /* crn = 0 op1 = 0 crm = 0 op2 = 4,7 : AArch32 aliases of MIDR */ + { .name = "MIDR", .type = ARM_CP_ALIAS | ARM_CP_CONST, + .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 4, + .access = PL1_R, .resetvalue = cpu->midr }, + { .name = "MIDR", .type = ARM_CP_ALIAS | ARM_CP_CONST, + .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 7, + .access = PL1_R, .resetvalue = cpu->midr }, + { .name = "REVIDR_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 0, .opc2 = 6, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->revidr }, + REGINFO_SENTINEL + }; + ARMCPRegInfo id_cp_reginfo[] = { + /* These are common to v8 and pre-v8 */ + { .name = "CTR", + .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->ctr }, + { .name = "CTR_EL0", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 3, .opc2 = 1, .crn = 0, .crm = 0, + .access = PL0_R, .accessfn = ctr_el0_access, + .type = ARM_CP_CONST, .resetvalue = cpu->ctr }, + /* TCMTR and TLBTR exist in v8 but have no 64-bit versions */ + { .name = "TCMTR", + .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 2, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 }, + REGINFO_SENTINEL + }; + /* TLBTR is specific to VMSA */ + ARMCPRegInfo id_tlbtr_reginfo = { + .name = "TLBTR", + .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 3, + .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0, + }; + /* MPUIR is specific to PMSA V6+ */ + ARMCPRegInfo id_mpuir_reginfo = { + .name = "MPUIR", + .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 4, + .access = PL1_R, .type = ARM_CP_CONST, + .resetvalue = cpu->pmsav7_dregion << 8 + }; + ARMCPRegInfo crn0_wi_reginfo = { + .name = "CRN0_WI", .cp = 15, .crn = 0, .crm = CP_ANY, + .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_W, + .type = ARM_CP_NOP | ARM_CP_OVERRIDE + }; + if (arm_feature(env, ARM_FEATURE_OMAPCP) || + arm_feature(env, ARM_FEATURE_STRONGARM)) { + ARMCPRegInfo *r; + /* Register the blanket "writes ignored" value first to cover the + * whole space. Then update the specific ID registers to allow write + * access, so that they ignore writes rather than causing them to + * UNDEF. + */ + define_one_arm_cp_reg(cpu, &crn0_wi_reginfo); + for (r = id_pre_v8_midr_cp_reginfo; + r->type != ARM_CP_SENTINEL; r++) { + r->access = PL1_RW; + } + for (r = id_cp_reginfo; r->type != ARM_CP_SENTINEL; r++) { + r->access = PL1_RW; + } + id_tlbtr_reginfo.access = PL1_RW; + id_tlbtr_reginfo.access = PL1_RW; + } + if (arm_feature(env, ARM_FEATURE_V8)) { + define_arm_cp_regs(cpu, id_v8_midr_cp_reginfo); + } else { + define_arm_cp_regs(cpu, id_pre_v8_midr_cp_reginfo); + } + define_arm_cp_regs(cpu, id_cp_reginfo); + if (!arm_feature(env, ARM_FEATURE_MPU)) { + define_one_arm_cp_reg(cpu, &id_tlbtr_reginfo); + } else if (arm_feature(env, ARM_FEATURE_V7)) { + define_one_arm_cp_reg(cpu, &id_mpuir_reginfo); + } + } + + if (arm_feature(env, ARM_FEATURE_MPIDR)) { + define_arm_cp_regs(cpu, mpidr_cp_reginfo); + } + + if (arm_feature(env, ARM_FEATURE_AUXCR)) { + ARMCPRegInfo auxcr = { + .name = "ACTLR_EL1", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 1, + .access = PL1_RW, .type = ARM_CP_CONST, + .resetvalue = cpu->reset_auxcr + }; + define_one_arm_cp_reg(cpu, &auxcr); + } + + if (arm_feature(env, ARM_FEATURE_CBAR)) { + if (arm_feature(env, ARM_FEATURE_AARCH64)) { + /* 32 bit view is [31:18] 0...0 [43:32]. */ + uint32_t cbar32 = (extract64(cpu->reset_cbar, 18, 14) << 18) + | extract64(cpu->reset_cbar, 32, 12); + ARMCPRegInfo cbar_reginfo[] = { + { .name = "CBAR", + .type = ARM_CP_CONST, + .cp = 15, .crn = 15, .crm = 0, .opc1 = 4, .opc2 = 0, + .access = PL1_R, .resetvalue = cpu->reset_cbar }, + { .name = "CBAR_EL1", .state = ARM_CP_STATE_AA64, + .type = ARM_CP_CONST, + .opc0 = 3, .opc1 = 1, .crn = 15, .crm = 3, .opc2 = 0, + .access = PL1_R, .resetvalue = cbar32 }, + REGINFO_SENTINEL + }; + /* We don't implement a r/w 64 bit CBAR currently */ + assert(arm_feature(env, ARM_FEATURE_CBAR_RO)); + define_arm_cp_regs(cpu, cbar_reginfo); + } else { + ARMCPRegInfo cbar = { + .name = "CBAR", + .cp = 15, .crn = 15, .crm = 0, .opc1 = 4, .opc2 = 0, + .access = PL1_R|PL3_W, .resetvalue = cpu->reset_cbar, + .fieldoffset = offsetof(CPUARMState, + cp15.c15_config_base_address) + }; + if (arm_feature(env, ARM_FEATURE_CBAR_RO)) { + cbar.access = PL1_R; + cbar.fieldoffset = 0; + cbar.type = ARM_CP_CONST; + } + define_one_arm_cp_reg(cpu, &cbar); + } + } + + /* Generic registers whose values depend on the implementation */ + { + ARMCPRegInfo sctlr = { + .name = "SCTLR", .state = ARM_CP_STATE_BOTH, + .opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 0, + .access = PL1_RW, + .bank_fieldoffsets = { offsetof(CPUARMState, cp15.sctlr_s), + offsetof(CPUARMState, cp15.sctlr_ns) }, + .writefn = sctlr_write, .resetvalue = cpu->reset_sctlr, + .raw_writefn = raw_write, + }; + if (arm_feature(env, ARM_FEATURE_XSCALE)) { + /* Normally we would always end the TB on an SCTLR write, but Linux + * arch/arm/mach-pxa/sleep.S expects two instructions following + * an MMU enable to execute from cache. Imitate this behaviour. + */ + sctlr.type |= ARM_CP_SUPPRESS_TB_END; + } + define_one_arm_cp_reg(cpu, &sctlr); + } +} + +ARMCPU *cpu_arm_init(const char *cpu_model) +{ + return ARM_CPU(cpu_generic_init(TYPE_ARM_CPU, cpu_model)); +} + +void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu) +{ + CPUState *cs = CPU(cpu); + CPUARMState *env = &cpu->env; + + if (arm_feature(env, ARM_FEATURE_AARCH64)) { + gdb_register_coprocessor(cs, aarch64_fpu_gdb_get_reg, + aarch64_fpu_gdb_set_reg, + 34, "aarch64-fpu.xml", 0); + } else if (arm_feature(env, ARM_FEATURE_NEON)) { + gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg, + 51, "arm-neon.xml", 0); + } else if (arm_feature(env, ARM_FEATURE_VFP3)) { + gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg, + 35, "arm-vfp3.xml", 0); + } else if (arm_feature(env, ARM_FEATURE_VFP)) { + gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg, + 19, "arm-vfp.xml", 0); + } +} + +/* Sort alphabetically by type name, except for "any". */ +static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b) +{ + ObjectClass *class_a = (ObjectClass *)a; + ObjectClass *class_b = (ObjectClass *)b; + const char *name_a, *name_b; + + name_a = object_class_get_name(class_a); + name_b = object_class_get_name(class_b); + if (strcmp(name_a, "any-" TYPE_ARM_CPU) == 0) { + return 1; + } else if (strcmp(name_b, "any-" TYPE_ARM_CPU) == 0) { + return -1; + } else { + return strcmp(name_a, name_b); + } +} + +static void arm_cpu_list_entry(gpointer data, gpointer user_data) +{ + ObjectClass *oc = data; + CPUListState *s = user_data; + const char *typename; + char *name; + + typename = object_class_get_name(oc); + name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_ARM_CPU)); + (*s->cpu_fprintf)(s->file, " %s\n", + name); + g_free(name); +} + +void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf) +{ + CPUListState s = { + .file = f, + .cpu_fprintf = cpu_fprintf, + }; + GSList *list; + + list = object_class_get_list(TYPE_ARM_CPU, false); + list = g_slist_sort(list, arm_cpu_list_compare); + (*cpu_fprintf)(f, "Available CPUs:\n"); + g_slist_foreach(list, arm_cpu_list_entry, &s); + g_slist_free(list); +#ifdef CONFIG_KVM + /* The 'host' CPU type is dynamically registered only if KVM is + * enabled, so we have to special-case it here: + */ + (*cpu_fprintf)(f, " host (only available in KVM mode)\n"); +#endif +} + +static void arm_cpu_add_definition(gpointer data, gpointer user_data) +{ + ObjectClass *oc = data; + CpuDefinitionInfoList **cpu_list = user_data; + CpuDefinitionInfoList *entry; + CpuDefinitionInfo *info; + const char *typename; + + typename = object_class_get_name(oc); + info = g_malloc0(sizeof(*info)); + info->name = g_strndup(typename, + strlen(typename) - strlen("-" TYPE_ARM_CPU)); + + entry = g_malloc0(sizeof(*entry)); + entry->value = info; + entry->next = *cpu_list; + *cpu_list = entry; +} + +CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp) +{ + CpuDefinitionInfoList *cpu_list = NULL; + GSList *list; + + list = object_class_get_list(TYPE_ARM_CPU, false); + g_slist_foreach(list, arm_cpu_add_definition, &cpu_list); + g_slist_free(list); + + return cpu_list; +} + +static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r, + void *opaque, int state, int secstate, + int crm, int opc1, int opc2) +{ + /* Private utility function for define_one_arm_cp_reg_with_opaque(): + * add a single reginfo struct to the hash table. + */ + uint32_t *key = g_new(uint32_t, 1); + ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo)); + int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0; + int ns = (secstate & ARM_CP_SECSTATE_NS) ? 1 : 0; + + /* Reset the secure state to the specific incoming state. This is + * necessary as the register may have been defined with both states. + */ + r2->secure = secstate; + + if (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1]) { + /* Register is banked (using both entries in array). + * Overwriting fieldoffset as the array is only used to define + * banked registers but later only fieldoffset is used. + */ + r2->fieldoffset = r->bank_fieldoffsets[ns]; + } + + if (state == ARM_CP_STATE_AA32) { + if (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1]) { + /* If the register is banked then we don't need to migrate or + * reset the 32-bit instance in certain cases: + * + * 1) If the register has both 32-bit and 64-bit instances then we + * can count on the 64-bit instance taking care of the + * non-secure bank. + * 2) If ARMv8 is enabled then we can count on a 64-bit version + * taking care of the secure bank. This requires that separate + * 32 and 64-bit definitions are provided. + */ + if ((r->state == ARM_CP_STATE_BOTH && ns) || + (arm_feature(&cpu->env, ARM_FEATURE_V8) && !ns)) { + r2->type |= ARM_CP_ALIAS; + } + } else if ((secstate != r->secure) && !ns) { + /* The register is not banked so we only want to allow migration of + * the non-secure instance. + */ + r2->type |= ARM_CP_ALIAS; + } + + if (r->state == ARM_CP_STATE_BOTH) { + /* We assume it is a cp15 register if the .cp field is left unset. + */ + if (r2->cp == 0) { + r2->cp = 15; + } + +#ifdef HOST_WORDS_BIGENDIAN + if (r2->fieldoffset) { + r2->fieldoffset += sizeof(uint32_t); + } +#endif + } + } + if (state == ARM_CP_STATE_AA64) { + /* To allow abbreviation of ARMCPRegInfo + * definitions, we treat cp == 0 as equivalent to + * the value for "standard guest-visible sysreg". + * STATE_BOTH definitions are also always "standard + * sysreg" in their AArch64 view (the .cp value may + * be non-zero for the benefit of the AArch32 view). + */ + if (r->cp == 0 || r->state == ARM_CP_STATE_BOTH) { + r2->cp = CP_REG_ARM64_SYSREG_CP; + } + *key = ENCODE_AA64_CP_REG(r2->cp, r2->crn, crm, + r2->opc0, opc1, opc2); + } else { + *key = ENCODE_CP_REG(r2->cp, is64, ns, r2->crn, crm, opc1, opc2); + } + if (opaque) { + r2->opaque = opaque; + } + /* reginfo passed to helpers is correct for the actual access, + * and is never ARM_CP_STATE_BOTH: + */ + r2->state = state; + /* Make sure reginfo passed to helpers for wildcarded regs + * has the correct crm/opc1/opc2 for this reg, not CP_ANY: + */ + r2->crm = crm; + r2->opc1 = opc1; + r2->opc2 = opc2; + /* By convention, for wildcarded registers only the first + * entry is used for migration; the others are marked as + * ALIAS so we don't try to transfer the register + * multiple times. Special registers (ie NOP/WFI) are + * never migratable and not even raw-accessible. + */ + if ((r->type & ARM_CP_SPECIAL)) { + r2->type |= ARM_CP_NO_RAW; + } + if (((r->crm == CP_ANY) && crm != 0) || + ((r->opc1 == CP_ANY) && opc1 != 0) || + ((r->opc2 == CP_ANY) && opc2 != 0)) { + r2->type |= ARM_CP_ALIAS; + } + + /* Check that raw accesses are either forbidden or handled. Note that + * we can't assert this earlier because the setup of fieldoffset for + * banked registers has to be done first. + */ + if (!(r2->type & ARM_CP_NO_RAW)) { + assert(!raw_accessors_invalid(r2)); + } + + /* Overriding of an existing definition must be explicitly + * requested. + */ + if (!(r->type & ARM_CP_OVERRIDE)) { + ARMCPRegInfo *oldreg; + oldreg = g_hash_table_lookup(cpu->cp_regs, key); + if (oldreg && !(oldreg->type & ARM_CP_OVERRIDE)) { + fprintf(stderr, "Register redefined: cp=%d %d bit " + "crn=%d crm=%d opc1=%d opc2=%d, " + "was %s, now %s\n", r2->cp, 32 + 32 * is64, + r2->crn, r2->crm, r2->opc1, r2->opc2, + oldreg->name, r2->name); + g_assert_not_reached(); + } + } + g_hash_table_insert(cpu->cp_regs, key, r2); +} + + +void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu, + const ARMCPRegInfo *r, void *opaque) +{ + /* Define implementations of coprocessor registers. + * We store these in a hashtable because typically + * there are less than 150 registers in a space which + * is 16*16*16*8*8 = 262144 in size. + * Wildcarding is supported for the crm, opc1 and opc2 fields. + * If a register is defined twice then the second definition is + * used, so this can be used to define some generic registers and + * then override them with implementation specific variations. + * At least one of the original and the second definition should + * include ARM_CP_OVERRIDE in its type bits -- this is just a guard + * against accidental use. + * + * The state field defines whether the register is to be + * visible in the AArch32 or AArch64 execution state. If the + * state is set to ARM_CP_STATE_BOTH then we synthesise a + * reginfo structure for the AArch32 view, which sees the lower + * 32 bits of the 64 bit register. + * + * Only registers visible in AArch64 may set r->opc0; opc0 cannot + * be wildcarded. AArch64 registers are always considered to be 64 + * bits; the ARM_CP_64BIT* flag applies only to the AArch32 view of + * the register, if any. + */ + int crm, opc1, opc2, state; + int crmmin = (r->crm == CP_ANY) ? 0 : r->crm; + int crmmax = (r->crm == CP_ANY) ? 15 : r->crm; + int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1; + int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1; + int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2; + int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2; + /* 64 bit registers have only CRm and Opc1 fields */ + assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn))); + /* op0 only exists in the AArch64 encodings */ + assert((r->state != ARM_CP_STATE_AA32) || (r->opc0 == 0)); + /* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless */ + assert((r->state != ARM_CP_STATE_AA64) || !(r->type & ARM_CP_64BIT)); + /* The AArch64 pseudocode CheckSystemAccess() specifies that op1 + * encodes a minimum access level for the register. We roll this + * runtime check into our general permission check code, so check + * here that the reginfo's specified permissions are strict enough + * to encompass the generic architectural permission check. + */ + if (r->state != ARM_CP_STATE_AA32) { + int mask = 0; + switch (r->opc1) { + case 0: case 1: case 2: + /* min_EL EL1 */ + mask = PL1_RW; + break; + case 3: + /* min_EL EL0 */ + mask = PL0_RW; + break; + case 4: + /* min_EL EL2 */ + mask = PL2_RW; + break; + case 5: + /* unallocated encoding, so not possible */ + assert(false); + break; + case 6: + /* min_EL EL3 */ + mask = PL3_RW; + break; + case 7: + /* min_EL EL1, secure mode only (we don't check the latter) */ + mask = PL1_RW; + break; + default: + /* broken reginfo with out-of-range opc1 */ + assert(false); + break; + } + /* assert our permissions are not too lax (stricter is fine) */ + assert((r->access & ~mask) == 0); + } + + /* Check that the register definition has enough info to handle + * reads and writes if they are permitted. + */ + if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) { + if (r->access & PL3_R) { + assert((r->fieldoffset || + (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1])) || + r->readfn); + } + if (r->access & PL3_W) { + assert((r->fieldoffset || + (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1])) || + r->writefn); + } + } + /* Bad type field probably means missing sentinel at end of reg list */ + assert(cptype_valid(r->type)); + for (crm = crmmin; crm <= crmmax; crm++) { + for (opc1 = opc1min; opc1 <= opc1max; opc1++) { + for (opc2 = opc2min; opc2 <= opc2max; opc2++) { + for (state = ARM_CP_STATE_AA32; + state <= ARM_CP_STATE_AA64; state++) { + if (r->state != state && r->state != ARM_CP_STATE_BOTH) { + continue; + } + if (state == ARM_CP_STATE_AA32) { + /* Under AArch32 CP registers can be common + * (same for secure and non-secure world) or banked. + */ + switch (r->secure) { + case ARM_CP_SECSTATE_S: + case ARM_CP_SECSTATE_NS: + add_cpreg_to_hashtable(cpu, r, opaque, state, + r->secure, crm, opc1, opc2); + break; + default: + add_cpreg_to_hashtable(cpu, r, opaque, state, + ARM_CP_SECSTATE_S, + crm, opc1, opc2); + add_cpreg_to_hashtable(cpu, r, opaque, state, + ARM_CP_SECSTATE_NS, + crm, opc1, opc2); + break; + } + } else { + /* AArch64 registers get mapped to non-secure instance + * of AArch32 */ + add_cpreg_to_hashtable(cpu, r, opaque, state, + ARM_CP_SECSTATE_NS, + crm, opc1, opc2); + } + } + } + } + } +} + +void define_arm_cp_regs_with_opaque(ARMCPU *cpu, + const ARMCPRegInfo *regs, void *opaque) +{ + /* Define a whole list of registers */ + const ARMCPRegInfo *r; + for (r = regs; r->type != ARM_CP_SENTINEL; r++) { + define_one_arm_cp_reg_with_opaque(cpu, r, opaque); + } +} + +const ARMCPRegInfo *get_arm_cp_reginfo(GHashTable *cpregs, uint32_t encoded_cp) +{ + return g_hash_table_lookup(cpregs, &encoded_cp); +} + +void arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + /* Helper coprocessor write function for write-ignore registers */ +} + +uint64_t arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri) +{ + /* Helper coprocessor write function for read-as-zero registers */ + return 0; +} + +void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *opaque) +{ + /* Helper coprocessor reset function for do-nothing-on-reset registers */ +} + +static int bad_mode_switch(CPUARMState *env, int mode) +{ + /* Return true if it is not valid for us to switch to + * this CPU mode (ie all the UNPREDICTABLE cases in + * the ARM ARM CPSRWriteByInstr pseudocode). + */ + switch (mode) { + case ARM_CPU_MODE_USR: + case ARM_CPU_MODE_SYS: + case ARM_CPU_MODE_SVC: + case ARM_CPU_MODE_ABT: + case ARM_CPU_MODE_UND: + case ARM_CPU_MODE_IRQ: + case ARM_CPU_MODE_FIQ: + return 0; + case ARM_CPU_MODE_MON: + return !arm_is_secure(env); + default: + return 1; + } +} + +uint32_t cpsr_read(CPUARMState *env) +{ + int ZF; + ZF = (env->ZF == 0); + return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) | + (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27) + | (env->thumb << 5) | ((env->condexec_bits & 3) << 25) + | ((env->condexec_bits & 0xfc) << 8) + | (env->GE << 16) | (env->daif & CPSR_AIF); +} + +void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask) +{ + uint32_t changed_daif; + + if (mask & CPSR_NZCV) { + env->ZF = (~val) & CPSR_Z; + env->NF = val; + env->CF = (val >> 29) & 1; + env->VF = (val << 3) & 0x80000000; + } + if (mask & CPSR_Q) + env->QF = ((val & CPSR_Q) != 0); + if (mask & CPSR_T) + env->thumb = ((val & CPSR_T) != 0); + if (mask & CPSR_IT_0_1) { + env->condexec_bits &= ~3; + env->condexec_bits |= (val >> 25) & 3; + } + if (mask & CPSR_IT_2_7) { + env->condexec_bits &= 3; + env->condexec_bits |= (val >> 8) & 0xfc; + } + if (mask & CPSR_GE) { + env->GE = (val >> 16) & 0xf; + } + + /* In a V7 implementation that includes the security extensions but does + * not include Virtualization Extensions the SCR.FW and SCR.AW bits control + * whether non-secure software is allowed to change the CPSR_F and CPSR_A + * bits respectively. + * + * In a V8 implementation, it is permitted for privileged software to + * change the CPSR A/F bits regardless of the SCR.AW/FW bits. + */ + if (!arm_feature(env, ARM_FEATURE_V8) && + arm_feature(env, ARM_FEATURE_EL3) && + !arm_feature(env, ARM_FEATURE_EL2) && + !arm_is_secure(env)) { + + changed_daif = (env->daif ^ val) & mask; + + if (changed_daif & CPSR_A) { + /* Check to see if we are allowed to change the masking of async + * abort exceptions from a non-secure state. + */ + if (!(env->cp15.scr_el3 & SCR_AW)) { + qemu_log_mask(LOG_GUEST_ERROR, + "Ignoring attempt to switch CPSR_A flag from " + "non-secure world with SCR.AW bit clear\n"); + mask &= ~CPSR_A; + } + } + + if (changed_daif & CPSR_F) { + /* Check to see if we are allowed to change the masking of FIQ + * exceptions from a non-secure state. + */ + if (!(env->cp15.scr_el3 & SCR_FW)) { + qemu_log_mask(LOG_GUEST_ERROR, + "Ignoring attempt to switch CPSR_F flag from " + "non-secure world with SCR.FW bit clear\n"); + mask &= ~CPSR_F; + } + + /* Check whether non-maskable FIQ (NMFI) support is enabled. + * If this bit is set software is not allowed to mask + * FIQs, but is allowed to set CPSR_F to 0. + */ + if ((A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_NMFI) && + (val & CPSR_F)) { + qemu_log_mask(LOG_GUEST_ERROR, + "Ignoring attempt to enable CPSR_F flag " + "(non-maskable FIQ [NMFI] support enabled)\n"); + mask &= ~CPSR_F; + } + } + } + + env->daif &= ~(CPSR_AIF & mask); + env->daif |= val & CPSR_AIF & mask; + + if ((env->uncached_cpsr ^ val) & mask & CPSR_M) { + if (bad_mode_switch(env, val & CPSR_M)) { + /* Attempt to switch to an invalid mode: this is UNPREDICTABLE. + * We choose to ignore the attempt and leave the CPSR M field + * untouched. + */ + mask &= ~CPSR_M; + } else { + switch_mode(env, val & CPSR_M); + } + } + mask &= ~CACHED_CPSR_BITS; + env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask); +} + +/* Sign/zero extend */ +uint32_t HELPER(sxtb16)(uint32_t x) +{ + uint32_t res; + res = (uint16_t)(int8_t)x; + res |= (uint32_t)(int8_t)(x >> 16) << 16; + return res; +} + +uint32_t HELPER(uxtb16)(uint32_t x) +{ + uint32_t res; + res = (uint16_t)(uint8_t)x; + res |= (uint32_t)(uint8_t)(x >> 16) << 16; + return res; +} + +uint32_t HELPER(clz)(uint32_t x) +{ + return clz32(x); +} + +int32_t HELPER(sdiv)(int32_t num, int32_t den) +{ + if (den == 0) + return 0; + if (num == INT_MIN && den == -1) + return INT_MIN; + return num / den; +} + +uint32_t HELPER(udiv)(uint32_t num, uint32_t den) +{ + if (den == 0) + return 0; + return num / den; +} + +uint32_t HELPER(rbit)(uint32_t x) +{ + x = ((x & 0xff000000) >> 24) + | ((x & 0x00ff0000) >> 8) + | ((x & 0x0000ff00) << 8) + | ((x & 0x000000ff) << 24); + x = ((x & 0xf0f0f0f0) >> 4) + | ((x & 0x0f0f0f0f) << 4); + x = ((x & 0x88888888) >> 3) + | ((x & 0x44444444) >> 1) + | ((x & 0x22222222) << 1) + | ((x & 0x11111111) << 3); + return x; +} + +#if defined(CONFIG_USER_ONLY) + +/* These should probably raise undefined insn exceptions. */ +void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + cpu_abort(CPU(cpu), "v7m_msr %d\n", reg); +} + +uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + cpu_abort(CPU(cpu), "v7m_mrs %d\n", reg); + return 0; +} + +void switch_mode(CPUARMState *env, int mode) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + if (mode != ARM_CPU_MODE_USR) { + cpu_abort(CPU(cpu), "Tried to switch out of user mode\n"); + } +} + +void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + cpu_abort(CPU(cpu), "banked r13 write\n"); +} + +uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + cpu_abort(CPU(cpu), "banked r13 read\n"); + return 0; +} + +uint32_t arm_phys_excp_target_el(CPUState *cs, uint32_t excp_idx, + uint32_t cur_el, bool secure) +{ + return 1; +} + +void aarch64_sync_64_to_32(CPUARMState *env) +{ + g_assert_not_reached(); +} + +#else + +/* Map CPU modes onto saved register banks. */ +int bank_number(int mode) +{ + switch (mode) { + case ARM_CPU_MODE_USR: + case ARM_CPU_MODE_SYS: + return 0; + case ARM_CPU_MODE_SVC: + return 1; + case ARM_CPU_MODE_ABT: + return 2; + case ARM_CPU_MODE_UND: + return 3; + case ARM_CPU_MODE_IRQ: + return 4; + case ARM_CPU_MODE_FIQ: + return 5; + case ARM_CPU_MODE_HYP: + return 6; + case ARM_CPU_MODE_MON: + return 7; + } + hw_error("bank number requested for bad CPSR mode value 0x%x\n", mode); +} + +void switch_mode(CPUARMState *env, int mode) +{ + int old_mode; + int i; + + old_mode = env->uncached_cpsr & CPSR_M; + if (mode == old_mode) + return; + + if (old_mode == ARM_CPU_MODE_FIQ) { + memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); + memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); + } else if (mode == ARM_CPU_MODE_FIQ) { + memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); + memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); + } + + i = bank_number(old_mode); + env->banked_r13[i] = env->regs[13]; + env->banked_r14[i] = env->regs[14]; + env->banked_spsr[i] = env->spsr; + + i = bank_number(mode); + env->regs[13] = env->banked_r13[i]; + env->regs[14] = env->banked_r14[i]; + env->spsr = env->banked_spsr[i]; +} + +/* Physical Interrupt Target EL Lookup Table + * + * [ From ARM ARM section G1.13.4 (Table G1-15) ] + * + * The below multi-dimensional table is used for looking up the target + * exception level given numerous condition criteria. Specifically, the + * target EL is based on SCR and HCR routing controls as well as the + * currently executing EL and secure state. + * + * Dimensions: + * target_el_table[2][2][2][2][2][4] + * | | | | | +--- Current EL + * | | | | +------ Non-secure(0)/Secure(1) + * | | | +--------- HCR mask override + * | | +------------ SCR exec state control + * | +--------------- SCR mask override + * +------------------ 32-bit(0)/64-bit(1) EL3 + * + * The table values are as such: + * 0-3 = EL0-EL3 + * -1 = Cannot occur + * + * The ARM ARM target EL table includes entries indicating that an "exception + * is not taken". The two cases where this is applicable are: + * 1) An exception is taken from EL3 but the SCR does not have the exception + * routed to EL3. + * 2) An exception is taken from EL2 but the HCR does not have the exception + * routed to EL2. + * In these two cases, the below table contain a target of EL1. This value is + * returned as it is expected that the consumer of the table data will check + * for "target EL >= current EL" to ensure the exception is not taken. + * + * SCR HCR + * 64 EA AMO From + * BIT IRQ IMO Non-secure Secure + * EL3 FIQ RW FMO EL0 EL1 EL2 EL3 EL0 EL1 EL2 EL3 + */ +const int8_t target_el_table[2][2][2][2][2][4] = { + {{{{/* 0 0 0 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },}, + {/* 0 0 0 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},}, + {{/* 0 0 1 0 */{ 1, 1, 2, -1 },{ 3, -1, -1, 3 },}, + {/* 0 0 1 1 */{ 2, 2, 2, -1 },{ 3, -1, -1, 3 },},},}, + {{{/* 0 1 0 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },}, + {/* 0 1 0 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},}, + {{/* 0 1 1 0 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },}, + {/* 0 1 1 1 */{ 3, 3, 3, -1 },{ 3, -1, -1, 3 },},},},}, + {{{{/* 1 0 0 0 */{ 1, 1, 2, -1 },{ 1, 1, -1, 1 },}, + {/* 1 0 0 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},}, + {{/* 1 0 1 0 */{ 1, 1, 1, -1 },{ 1, 1, -1, 1 },}, + {/* 1 0 1 1 */{ 2, 2, 2, -1 },{ 1, 1, -1, 1 },},},}, + {{{/* 1 1 0 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },}, + {/* 1 1 0 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},}, + {{/* 1 1 1 0 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },}, + {/* 1 1 1 1 */{ 3, 3, 3, -1 },{ 3, 3, -1, 3 },},},},}, +}; + +/* + * Determine the target EL for physical exceptions + */ +uint32_t arm_phys_excp_target_el(CPUState *cs, uint32_t excp_idx, + uint32_t cur_el, bool secure) +{ + CPUARMState *env = cs->env_ptr; + int rw = ((env->cp15.scr_el3 & SCR_RW) == SCR_RW); + int scr; + int hcr; + int target_el; + int is64 = arm_el_is_aa64(env, 3); + + switch (excp_idx) { + case EXCP_IRQ: + scr = ((env->cp15.scr_el3 & SCR_IRQ) == SCR_IRQ); + hcr = ((env->cp15.hcr_el2 & HCR_IMO) == HCR_IMO); + break; + case EXCP_FIQ: + scr = ((env->cp15.scr_el3 & SCR_FIQ) == SCR_FIQ); + hcr = ((env->cp15.hcr_el2 & HCR_FMO) == HCR_FMO); + break; + default: + scr = ((env->cp15.scr_el3 & SCR_EA) == SCR_EA); + hcr = ((env->cp15.hcr_el2 & HCR_AMO) == HCR_AMO); + break; + }; + + /* If HCR.TGE is set then HCR is treated as being 1 */ + hcr |= ((env->cp15.hcr_el2 & HCR_TGE) == HCR_TGE); + + /* Perform a table-lookup for the target EL given the current state */ + target_el = target_el_table[is64][scr][rw][hcr][secure][cur_el]; + + assert(target_el > 0); + + return target_el; +} + +static void v7m_push(CPUARMState *env, uint32_t val) +{ + CPUState *cs = CPU(arm_env_get_cpu(env)); + + env->regs[13] -= 4; + stl_phys(cs->as, env->regs[13], val); +} + +static uint32_t v7m_pop(CPUARMState *env) +{ + CPUState *cs = CPU(arm_env_get_cpu(env)); + uint32_t val; + + val = ldl_phys(cs->as, env->regs[13]); + env->regs[13] += 4; + return val; +} + +/* Switch to V7M main or process stack pointer. */ +static void switch_v7m_sp(CPUARMState *env, int process) +{ + uint32_t tmp; + if (env->v7m.current_sp != process) { + tmp = env->v7m.other_sp; + env->v7m.other_sp = env->regs[13]; + env->regs[13] = tmp; + env->v7m.current_sp = process; + } +} + +static void do_v7m_exception_exit(CPUARMState *env) +{ + uint32_t type; + uint32_t xpsr; + + type = env->regs[15]; + if (env->v7m.exception != 0) + armv7m_nvic_complete_irq(env->nvic, env->v7m.exception); + + /* Switch to the target stack. */ + switch_v7m_sp(env, (type & 4) != 0); + /* Pop registers. */ + env->regs[0] = v7m_pop(env); + env->regs[1] = v7m_pop(env); + env->regs[2] = v7m_pop(env); + env->regs[3] = v7m_pop(env); + env->regs[12] = v7m_pop(env); + env->regs[14] = v7m_pop(env); + env->regs[15] = v7m_pop(env); + if (env->regs[15] & 1) { + qemu_log_mask(LOG_GUEST_ERROR, + "M profile return from interrupt with misaligned " + "PC is UNPREDICTABLE\n"); + /* Actual hardware seems to ignore the lsbit, and there are several + * RTOSes out there which incorrectly assume the r15 in the stack + * frame should be a Thumb-style "lsbit indicates ARM/Thumb" value. + */ + env->regs[15] &= ~1U; + } + xpsr = v7m_pop(env); + xpsr_write(env, xpsr, 0xfffffdff); + /* Undo stack alignment. */ + if (xpsr & 0x200) + env->regs[13] |= 4; + /* ??? The exception return type specifies Thread/Handler mode. However + this is also implied by the xPSR value. Not sure what to do + if there is a mismatch. */ + /* ??? Likewise for mismatches between the CONTROL register and the stack + pointer. */ +} + +void arm_v7m_cpu_do_interrupt(CPUState *cs) +{ + ARMCPU *cpu = ARM_CPU(cs); + CPUARMState *env = &cpu->env; + uint32_t xpsr = xpsr_read(env); + uint32_t lr; + uint32_t addr; + + arm_log_exception(cs->exception_index); + + lr = 0xfffffff1; + if (env->v7m.current_sp) + lr |= 4; + if (env->v7m.exception == 0) + lr |= 8; + + /* For exceptions we just mark as pending on the NVIC, and let that + handle it. */ + /* TODO: Need to escalate if the current priority is higher than the + one we're raising. */ + switch (cs->exception_index) { + case EXCP_UDEF: + armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE); + return; + case EXCP_SWI: + /* The PC already points to the next instruction. */ + armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC); + return; + case EXCP_PREFETCH_ABORT: + case EXCP_DATA_ABORT: + /* TODO: if we implemented the MPU registers, this is where we + * should set the MMFAR, etc from exception.fsr and exception.vaddress. + */ + armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM); + return; + case EXCP_BKPT: + if (semihosting_enabled()) { + int nr; + nr = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff; + if (nr == 0xab) { + env->regs[15] += 2; + env->regs[0] = do_arm_semihosting(env); + qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n"); + return; + } + } + armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG); + return; + case EXCP_IRQ: + env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic); + break; + case EXCP_EXCEPTION_EXIT: + do_v7m_exception_exit(env); + return; + default: + cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index); + return; /* Never happens. Keep compiler happy. */ + } + + /* Align stack pointer. */ + /* ??? Should only do this if Configuration Control Register + STACKALIGN bit is set. */ + if (env->regs[13] & 4) { + env->regs[13] -= 4; + xpsr |= 0x200; + } + /* Switch to the handler mode. */ + v7m_push(env, xpsr); + v7m_push(env, env->regs[15]); + v7m_push(env, env->regs[14]); + v7m_push(env, env->regs[12]); + v7m_push(env, env->regs[3]); + v7m_push(env, env->regs[2]); + v7m_push(env, env->regs[1]); + v7m_push(env, env->regs[0]); + switch_v7m_sp(env, 0); + /* Clear IT bits */ + env->condexec_bits = 0; + env->regs[14] = lr; + addr = ldl_phys(cs->as, env->v7m.vecbase + env->v7m.exception * 4); + env->regs[15] = addr & 0xfffffffe; + env->thumb = addr & 1; +} + +/* Function used to synchronize QEMU's AArch64 register set with AArch32 + * register set. This is necessary when switching between AArch32 and AArch64 + * execution state. + */ +void aarch64_sync_32_to_64(CPUARMState *env) +{ + int i; + uint32_t mode = env->uncached_cpsr & CPSR_M; + + /* We can blanket copy R[0:7] to X[0:7] */ + for (i = 0; i < 8; i++) { + env->xregs[i] = env->regs[i]; + } + + /* Unless we are in FIQ mode, x8-x12 come from the user registers r8-r12. + * Otherwise, they come from the banked user regs. + */ + if (mode == ARM_CPU_MODE_FIQ) { + for (i = 8; i < 13; i++) { + env->xregs[i] = env->usr_regs[i - 8]; + } + } else { + for (i = 8; i < 13; i++) { + env->xregs[i] = env->regs[i]; + } + } + + /* Registers x13-x23 are the various mode SP and FP registers. Registers + * r13 and r14 are only copied if we are in that mode, otherwise we copy + * from the mode banked register. + */ + if (mode == ARM_CPU_MODE_USR || mode == ARM_CPU_MODE_SYS) { + env->xregs[13] = env->regs[13]; + env->xregs[14] = env->regs[14]; + } else { + env->xregs[13] = env->banked_r13[bank_number(ARM_CPU_MODE_USR)]; + /* HYP is an exception in that it is copied from r14 */ + if (mode == ARM_CPU_MODE_HYP) { + env->xregs[14] = env->regs[14]; + } else { + env->xregs[14] = env->banked_r14[bank_number(ARM_CPU_MODE_USR)]; + } + } + + if (mode == ARM_CPU_MODE_HYP) { + env->xregs[15] = env->regs[13]; + } else { + env->xregs[15] = env->banked_r13[bank_number(ARM_CPU_MODE_HYP)]; + } + + if (mode == ARM_CPU_MODE_IRQ) { + env->xregs[16] = env->regs[13]; + env->xregs[17] = env->regs[14]; + } else { + env->xregs[16] = env->banked_r13[bank_number(ARM_CPU_MODE_IRQ)]; + env->xregs[17] = env->banked_r14[bank_number(ARM_CPU_MODE_IRQ)]; + } + + if (mode == ARM_CPU_MODE_SVC) { + env->xregs[18] = env->regs[13]; + env->xregs[19] = env->regs[14]; + } else { + env->xregs[18] = env->banked_r13[bank_number(ARM_CPU_MODE_SVC)]; + env->xregs[19] = env->banked_r14[bank_number(ARM_CPU_MODE_SVC)]; + } + + if (mode == ARM_CPU_MODE_ABT) { + env->xregs[20] = env->regs[13]; + env->xregs[21] = env->regs[14]; + } else { + env->xregs[20] = env->banked_r13[bank_number(ARM_CPU_MODE_ABT)]; + env->xregs[21] = env->banked_r14[bank_number(ARM_CPU_MODE_ABT)]; + } + + if (mode == ARM_CPU_MODE_UND) { + env->xregs[22] = env->regs[13]; + env->xregs[23] = env->regs[14]; + } else { + env->xregs[22] = env->banked_r13[bank_number(ARM_CPU_MODE_UND)]; + env->xregs[23] = env->banked_r14[bank_number(ARM_CPU_MODE_UND)]; + } + + /* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ + * mode, then we can copy from r8-r14. Otherwise, we copy from the + * FIQ bank for r8-r14. + */ + if (mode == ARM_CPU_MODE_FIQ) { + for (i = 24; i < 31; i++) { + env->xregs[i] = env->regs[i - 16]; /* X[24:30] <- R[8:14] */ + } + } else { + for (i = 24; i < 29; i++) { + env->xregs[i] = env->fiq_regs[i - 24]; + } + env->xregs[29] = env->banked_r13[bank_number(ARM_CPU_MODE_FIQ)]; + env->xregs[30] = env->banked_r14[bank_number(ARM_CPU_MODE_FIQ)]; + } + + env->pc = env->regs[15]; +} + +/* Function used to synchronize QEMU's AArch32 register set with AArch64 + * register set. This is necessary when switching between AArch32 and AArch64 + * execution state. + */ +void aarch64_sync_64_to_32(CPUARMState *env) +{ + int i; + uint32_t mode = env->uncached_cpsr & CPSR_M; + + /* We can blanket copy X[0:7] to R[0:7] */ + for (i = 0; i < 8; i++) { + env->regs[i] = env->xregs[i]; + } + + /* Unless we are in FIQ mode, r8-r12 come from the user registers x8-x12. + * Otherwise, we copy x8-x12 into the banked user regs. + */ + if (mode == ARM_CPU_MODE_FIQ) { + for (i = 8; i < 13; i++) { + env->usr_regs[i - 8] = env->xregs[i]; + } + } else { + for (i = 8; i < 13; i++) { + env->regs[i] = env->xregs[i]; + } + } + + /* Registers r13 & r14 depend on the current mode. + * If we are in a given mode, we copy the corresponding x registers to r13 + * and r14. Otherwise, we copy the x register to the banked r13 and r14 + * for the mode. + */ + if (mode == ARM_CPU_MODE_USR || mode == ARM_CPU_MODE_SYS) { + env->regs[13] = env->xregs[13]; + env->regs[14] = env->xregs[14]; + } else { + env->banked_r13[bank_number(ARM_CPU_MODE_USR)] = env->xregs[13]; + + /* HYP is an exception in that it does not have its own banked r14 but + * shares the USR r14 + */ + if (mode == ARM_CPU_MODE_HYP) { + env->regs[14] = env->xregs[14]; + } else { + env->banked_r14[bank_number(ARM_CPU_MODE_USR)] = env->xregs[14]; + } + } + + if (mode == ARM_CPU_MODE_HYP) { + env->regs[13] = env->xregs[15]; + } else { + env->banked_r13[bank_number(ARM_CPU_MODE_HYP)] = env->xregs[15]; + } + + if (mode == ARM_CPU_MODE_IRQ) { + env->regs[13] = env->xregs[16]; + env->regs[14] = env->xregs[17]; + } else { + env->banked_r13[bank_number(ARM_CPU_MODE_IRQ)] = env->xregs[16]; + env->banked_r14[bank_number(ARM_CPU_MODE_IRQ)] = env->xregs[17]; + } + + if (mode == ARM_CPU_MODE_SVC) { + env->regs[13] = env->xregs[18]; + env->regs[14] = env->xregs[19]; + } else { + env->banked_r13[bank_number(ARM_CPU_MODE_SVC)] = env->xregs[18]; + env->banked_r14[bank_number(ARM_CPU_MODE_SVC)] = env->xregs[19]; + } + + if (mode == ARM_CPU_MODE_ABT) { + env->regs[13] = env->xregs[20]; + env->regs[14] = env->xregs[21]; + } else { + env->banked_r13[bank_number(ARM_CPU_MODE_ABT)] = env->xregs[20]; + env->banked_r14[bank_number(ARM_CPU_MODE_ABT)] = env->xregs[21]; + } + + if (mode == ARM_CPU_MODE_UND) { + env->regs[13] = env->xregs[22]; + env->regs[14] = env->xregs[23]; + } else { + env->banked_r13[bank_number(ARM_CPU_MODE_UND)] = env->xregs[22]; + env->banked_r14[bank_number(ARM_CPU_MODE_UND)] = env->xregs[23]; + } + + /* Registers x24-x30 are mapped to r8-r14 in FIQ mode. If we are in FIQ + * mode, then we can copy to r8-r14. Otherwise, we copy to the + * FIQ bank for r8-r14. + */ + if (mode == ARM_CPU_MODE_FIQ) { + for (i = 24; i < 31; i++) { + env->regs[i - 16] = env->xregs[i]; /* X[24:30] -> R[8:14] */ + } + } else { + for (i = 24; i < 29; i++) { + env->fiq_regs[i - 24] = env->xregs[i]; + } + env->banked_r13[bank_number(ARM_CPU_MODE_FIQ)] = env->xregs[29]; + env->banked_r14[bank_number(ARM_CPU_MODE_FIQ)] = env->xregs[30]; + } + + env->regs[15] = env->pc; +} + +/* Handle a CPU exception. */ +void arm_cpu_do_interrupt(CPUState *cs) +{ + ARMCPU *cpu = ARM_CPU(cs); + CPUARMState *env = &cpu->env; + uint32_t addr; + uint32_t mask; + int new_mode; + uint32_t offset; + uint32_t moe; + + assert(!IS_M(env)); + + arm_log_exception(cs->exception_index); + + if (arm_is_psci_call(cpu, cs->exception_index)) { + arm_handle_psci_call(cpu); + qemu_log_mask(CPU_LOG_INT, "...handled as PSCI call\n"); + return; + } + + /* If this is a debug exception we must update the DBGDSCR.MOE bits */ + switch (env->exception.syndrome >> ARM_EL_EC_SHIFT) { + case EC_BREAKPOINT: + case EC_BREAKPOINT_SAME_EL: + moe = 1; + break; + case EC_WATCHPOINT: + case EC_WATCHPOINT_SAME_EL: + moe = 10; + break; + case EC_AA32_BKPT: + moe = 3; + break; + case EC_VECTORCATCH: + moe = 5; + break; + default: + moe = 0; + break; + } + + if (moe) { + env->cp15.mdscr_el1 = deposit64(env->cp15.mdscr_el1, 2, 4, moe); + } + + /* TODO: Vectored interrupt controller. */ + switch (cs->exception_index) { + case EXCP_UDEF: + new_mode = ARM_CPU_MODE_UND; + addr = 0x04; + mask = CPSR_I; + if (env->thumb) + offset = 2; + else + offset = 4; + break; + case EXCP_SWI: + if (semihosting_enabled()) { + /* Check for semihosting interrupt. */ + if (env->thumb) { + mask = arm_lduw_code(env, env->regs[15] - 2, env->bswap_code) + & 0xff; + } else { + mask = arm_ldl_code(env, env->regs[15] - 4, env->bswap_code) + & 0xffffff; + } + /* Only intercept calls from privileged modes, to provide some + semblance of security. */ + if (((mask == 0x123456 && !env->thumb) + || (mask == 0xab && env->thumb)) + && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { + env->regs[0] = do_arm_semihosting(env); + qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n"); + return; + } + } + new_mode = ARM_CPU_MODE_SVC; + addr = 0x08; + mask = CPSR_I; + /* The PC already points to the next instruction. */ + offset = 0; + break; + case EXCP_BKPT: + /* See if this is a semihosting syscall. */ + if (env->thumb && semihosting_enabled()) { + mask = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff; + if (mask == 0xab + && (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) { + env->regs[15] += 2; + env->regs[0] = do_arm_semihosting(env); + qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n"); + return; + } + } + env->exception.fsr = 2; + /* Fall through to prefetch abort. */ + case EXCP_PREFETCH_ABORT: + A32_BANKED_CURRENT_REG_SET(env, ifsr, env->exception.fsr); + A32_BANKED_CURRENT_REG_SET(env, ifar, env->exception.vaddress); + qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x IFAR 0x%x\n", + env->exception.fsr, (uint32_t)env->exception.vaddress); + new_mode = ARM_CPU_MODE_ABT; + addr = 0x0c; + mask = CPSR_A | CPSR_I; + offset = 4; + break; + case EXCP_DATA_ABORT: + A32_BANKED_CURRENT_REG_SET(env, dfsr, env->exception.fsr); + A32_BANKED_CURRENT_REG_SET(env, dfar, env->exception.vaddress); + qemu_log_mask(CPU_LOG_INT, "...with DFSR 0x%x DFAR 0x%x\n", + env->exception.fsr, + (uint32_t)env->exception.vaddress); + new_mode = ARM_CPU_MODE_ABT; + addr = 0x10; + mask = CPSR_A | CPSR_I; + offset = 8; + break; + case EXCP_IRQ: + new_mode = ARM_CPU_MODE_IRQ; + addr = 0x18; + /* Disable IRQ and imprecise data aborts. */ + mask = CPSR_A | CPSR_I; + offset = 4; + if (env->cp15.scr_el3 & SCR_IRQ) { + /* IRQ routed to monitor mode */ + new_mode = ARM_CPU_MODE_MON; + mask |= CPSR_F; + } + break; + case EXCP_FIQ: + new_mode = ARM_CPU_MODE_FIQ; + addr = 0x1c; + /* Disable FIQ, IRQ and imprecise data aborts. */ + mask = CPSR_A | CPSR_I | CPSR_F; + if (env->cp15.scr_el3 & SCR_FIQ) { + /* FIQ routed to monitor mode */ + new_mode = ARM_CPU_MODE_MON; + } + offset = 4; + break; + case EXCP_SMC: + new_mode = ARM_CPU_MODE_MON; + addr = 0x08; + mask = CPSR_A | CPSR_I | CPSR_F; + offset = 0; + break; + default: + cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index); + return; /* Never happens. Keep compiler happy. */ + } + + if (new_mode == ARM_CPU_MODE_MON) { + addr += env->cp15.mvbar; + } else if (A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_V) { + /* High vectors. When enabled, base address cannot be remapped. */ + addr += 0xffff0000; + } else { + /* ARM v7 architectures provide a vector base address register to remap + * the interrupt vector table. + * This register is only followed in non-monitor mode, and is banked. + * Note: only bits 31:5 are valid. + */ + addr += A32_BANKED_CURRENT_REG_GET(env, vbar); + } + + if ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_MON) { + env->cp15.scr_el3 &= ~SCR_NS; + } + + switch_mode (env, new_mode); + /* For exceptions taken to AArch32 we must clear the SS bit in both + * PSTATE and in the old-state value we save to SPSR_<mode>, so zero it now. + */ + env->uncached_cpsr &= ~PSTATE_SS; + env->spsr = cpsr_read(env); + /* Clear IT bits. */ + env->condexec_bits = 0; + /* Switch to the new mode, and to the correct instruction set. */ + env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode; + env->daif |= mask; + /* this is a lie, as the was no c1_sys on V4T/V5, but who cares + * and we should just guard the thumb mode on V4 */ + if (arm_feature(env, ARM_FEATURE_V4T)) { + env->thumb = (A32_BANKED_CURRENT_REG_GET(env, sctlr) & SCTLR_TE) != 0; + } + env->regs[14] = env->regs[15] + offset; + env->regs[15] = addr; + cs->interrupt_request |= CPU_INTERRUPT_EXITTB; +} + + +/* Return the exception level which controls this address translation regime */ +static inline uint32_t regime_el(CPUARMState *env, ARMMMUIdx mmu_idx) +{ + switch (mmu_idx) { + case ARMMMUIdx_S2NS: + case ARMMMUIdx_S1E2: + return 2; + case ARMMMUIdx_S1E3: + return 3; + case ARMMMUIdx_S1SE0: + return arm_el_is_aa64(env, 3) ? 1 : 3; + case ARMMMUIdx_S1SE1: + case ARMMMUIdx_S1NSE0: + case ARMMMUIdx_S1NSE1: + return 1; + default: + g_assert_not_reached(); + } +} + +/* Return true if this address translation regime is secure */ +static inline bool regime_is_secure(CPUARMState *env, ARMMMUIdx mmu_idx) +{ + switch (mmu_idx) { + case ARMMMUIdx_S12NSE0: + case ARMMMUIdx_S12NSE1: + case ARMMMUIdx_S1NSE0: + case ARMMMUIdx_S1NSE1: + case ARMMMUIdx_S1E2: + case ARMMMUIdx_S2NS: + return false; + case ARMMMUIdx_S1E3: + case ARMMMUIdx_S1SE0: + case ARMMMUIdx_S1SE1: + return true; + default: + g_assert_not_reached(); + } +} + +/* Return the SCTLR value which controls this address translation regime */ +static inline uint32_t regime_sctlr(CPUARMState *env, ARMMMUIdx mmu_idx) +{ + return env->cp15.sctlr_el[regime_el(env, mmu_idx)]; +} + +/* Return true if the specified stage of address translation is disabled */ +static inline bool regime_translation_disabled(CPUARMState *env, + ARMMMUIdx mmu_idx) +{ + if (mmu_idx == ARMMMUIdx_S2NS) { + return (env->cp15.hcr_el2 & HCR_VM) == 0; + } + return (regime_sctlr(env, mmu_idx) & SCTLR_M) == 0; +} + +/* Return the TCR controlling this translation regime */ +static inline TCR *regime_tcr(CPUARMState *env, ARMMMUIdx mmu_idx) +{ + if (mmu_idx == ARMMMUIdx_S2NS) { + /* TODO: return VTCR_EL2 */ + g_assert_not_reached(); + } + return &env->cp15.tcr_el[regime_el(env, mmu_idx)]; +} + +/* Return the TTBR associated with this translation regime */ +static inline uint64_t regime_ttbr(CPUARMState *env, ARMMMUIdx mmu_idx, + int ttbrn) +{ + if (mmu_idx == ARMMMUIdx_S2NS) { + /* TODO: return VTTBR_EL2 */ + g_assert_not_reached(); + } + if (ttbrn == 0) { + return env->cp15.ttbr0_el[regime_el(env, mmu_idx)]; + } else { + return env->cp15.ttbr1_el[regime_el(env, mmu_idx)]; + } +} + +/* Return true if the translation regime is using LPAE format page tables */ +static inline bool regime_using_lpae_format(CPUARMState *env, + ARMMMUIdx mmu_idx) +{ + int el = regime_el(env, mmu_idx); + if (el == 2 || arm_el_is_aa64(env, el)) { + return true; + } + if (arm_feature(env, ARM_FEATURE_LPAE) + && (regime_tcr(env, mmu_idx)->raw_tcr & TTBCR_EAE)) { + return true; + } + return false; +} + +static inline bool regime_is_user(CPUARMState *env, ARMMMUIdx mmu_idx) +{ + switch (mmu_idx) { + case ARMMMUIdx_S1SE0: + case ARMMMUIdx_S1NSE0: + return true; + default: + return false; + case ARMMMUIdx_S12NSE0: + case ARMMMUIdx_S12NSE1: + g_assert_not_reached(); + } +} + +/* Translate section/page access permissions to page + * R/W protection flags + * + * @env: CPUARMState + * @mmu_idx: MMU index indicating required translation regime + * @ap: The 3-bit access permissions (AP[2:0]) + * @domain_prot: The 2-bit domain access permissions + */ +static inline int ap_to_rw_prot(CPUARMState *env, ARMMMUIdx mmu_idx, + int ap, int domain_prot) +{ + bool is_user = regime_is_user(env, mmu_idx); + + if (domain_prot == 3) { + return PAGE_READ | PAGE_WRITE; + } + + switch (ap) { + case 0: + if (arm_feature(env, ARM_FEATURE_V7)) { + return 0; + } + switch (regime_sctlr(env, mmu_idx) & (SCTLR_S | SCTLR_R)) { + case SCTLR_S: + return is_user ? 0 : PAGE_READ; + case SCTLR_R: + return PAGE_READ; + default: + return 0; + } + case 1: + return is_user ? 0 : PAGE_READ | PAGE_WRITE; + case 2: + if (is_user) { + return PAGE_READ; + } else { + return PAGE_READ | PAGE_WRITE; + } + case 3: + return PAGE_READ | PAGE_WRITE; + case 4: /* Reserved. */ + return 0; + case 5: + return is_user ? 0 : PAGE_READ; + case 6: + return PAGE_READ; + case 7: + if (!arm_feature(env, ARM_FEATURE_V6K)) { + return 0; + } + return PAGE_READ; + default: + g_assert_not_reached(); + } +} + +/* Translate section/page access permissions to page + * R/W protection flags. + * + * @ap: The 2-bit simple AP (AP[2:1]) + * @is_user: TRUE if accessing from PL0 + */ +static inline int simple_ap_to_rw_prot_is_user(int ap, bool is_user) +{ + switch (ap) { + case 0: + return is_user ? 0 : PAGE_READ | PAGE_WRITE; + case 1: + return PAGE_READ | PAGE_WRITE; + case 2: + return is_user ? 0 : PAGE_READ; + case 3: + return PAGE_READ; + default: + g_assert_not_reached(); + } +} + +static inline int +simple_ap_to_rw_prot(CPUARMState *env, ARMMMUIdx mmu_idx, int ap) +{ + return simple_ap_to_rw_prot_is_user(ap, regime_is_user(env, mmu_idx)); +} + +/* Translate section/page access permissions to protection flags + * + * @env: CPUARMState + * @mmu_idx: MMU index indicating required translation regime + * @is_aa64: TRUE if AArch64 + * @ap: The 2-bit simple AP (AP[2:1]) + * @ns: NS (non-secure) bit + * @xn: XN (execute-never) bit + * @pxn: PXN (privileged execute-never) bit + */ +static int get_S1prot(CPUARMState *env, ARMMMUIdx mmu_idx, bool is_aa64, + int ap, int ns, int xn, int pxn) +{ + bool is_user = regime_is_user(env, mmu_idx); + int prot_rw, user_rw; + bool have_wxn; + int wxn = 0; + + assert(mmu_idx != ARMMMUIdx_S2NS); + + user_rw = simple_ap_to_rw_prot_is_user(ap, true); + if (is_user) { + prot_rw = user_rw; + } else { + prot_rw = simple_ap_to_rw_prot_is_user(ap, false); + } + + if (ns && arm_is_secure(env) && (env->cp15.scr_el3 & SCR_SIF)) { + return prot_rw; + } + + /* TODO have_wxn should be replaced with + * ARM_FEATURE_V8 || (ARM_FEATURE_V7 && ARM_FEATURE_EL2) + * when ARM_FEATURE_EL2 starts getting set. For now we assume all LPAE + * compatible processors have EL2, which is required for [U]WXN. + */ + have_wxn = arm_feature(env, ARM_FEATURE_LPAE); + + if (have_wxn) { + wxn = regime_sctlr(env, mmu_idx) & SCTLR_WXN; + } + + if (is_aa64) { + switch (regime_el(env, mmu_idx)) { + case 1: + if (!is_user) { + xn = pxn || (user_rw & PAGE_WRITE); + } + break; + case 2: + case 3: + break; + } + } else if (arm_feature(env, ARM_FEATURE_V7)) { + switch (regime_el(env, mmu_idx)) { + case 1: + case 3: + if (is_user) { + xn = xn || !(user_rw & PAGE_READ); + } else { + int uwxn = 0; + if (have_wxn) { + uwxn = regime_sctlr(env, mmu_idx) & SCTLR_UWXN; + } + xn = xn || !(prot_rw & PAGE_READ) || pxn || + (uwxn && (user_rw & PAGE_WRITE)); + } + break; + case 2: + break; + } + } else { + xn = wxn = 0; + } + + if (xn || (wxn && (prot_rw & PAGE_WRITE))) { + return prot_rw; + } + return prot_rw | PAGE_EXEC; +} + +static bool get_level1_table_address(CPUARMState *env, ARMMMUIdx mmu_idx, + uint32_t *table, uint32_t address) +{ + /* Note that we can only get here for an AArch32 PL0/PL1 lookup */ + TCR *tcr = regime_tcr(env, mmu_idx); + + if (address & tcr->mask) { + if (tcr->raw_tcr & TTBCR_PD1) { + /* Translation table walk disabled for TTBR1 */ + return false; + } + *table = regime_ttbr(env, mmu_idx, 1) & 0xffffc000; + } else { + if (tcr->raw_tcr & TTBCR_PD0) { + /* Translation table walk disabled for TTBR0 */ + return false; + } + *table = regime_ttbr(env, mmu_idx, 0) & tcr->base_mask; + } + *table |= (address >> 18) & 0x3ffc; + return true; +} + +/* All loads done in the course of a page table walk go through here. + * TODO: rather than ignoring errors from physical memory reads (which + * are external aborts in ARM terminology) we should propagate this + * error out so that we can turn it into a Data Abort if this walk + * was being done for a CPU load/store or an address translation instruction + * (but not if it was for a debug access). + */ +static uint32_t arm_ldl_ptw(CPUState *cs, hwaddr addr, bool is_secure) +{ + MemTxAttrs attrs = {}; + + attrs.secure = is_secure; + return address_space_ldl(cs->as, addr, attrs, NULL); +} + +static uint64_t arm_ldq_ptw(CPUState *cs, hwaddr addr, bool is_secure) +{ + MemTxAttrs attrs = {}; + + attrs.secure = is_secure; + return address_space_ldq(cs->as, addr, attrs, NULL); +} + +static bool get_phys_addr_v5(CPUARMState *env, uint32_t address, + int access_type, ARMMMUIdx mmu_idx, + hwaddr *phys_ptr, int *prot, + target_ulong *page_size, uint32_t *fsr) +{ + CPUState *cs = CPU(arm_env_get_cpu(env)); + int code; + uint32_t table; + uint32_t desc; + int type; + int ap; + int domain = 0; + int domain_prot; + hwaddr phys_addr; + uint32_t dacr; + + /* Pagetable walk. */ + /* Lookup l1 descriptor. */ + if (!get_level1_table_address(env, mmu_idx, &table, address)) { + /* Section translation fault if page walk is disabled by PD0 or PD1 */ + code = 5; + goto do_fault; + } + desc = arm_ldl_ptw(cs, table, regime_is_secure(env, mmu_idx)); + type = (desc & 3); + domain = (desc >> 5) & 0x0f; + if (regime_el(env, mmu_idx) == 1) { + dacr = env->cp15.dacr_ns; + } else { + dacr = env->cp15.dacr_s; + } + domain_prot = (dacr >> (domain * 2)) & 3; + if (type == 0) { + /* Section translation fault. */ + code = 5; + goto do_fault; + } + if (domain_prot == 0 || domain_prot == 2) { + if (type == 2) + code = 9; /* Section domain fault. */ + else + code = 11; /* Page domain fault. */ + goto do_fault; + } + if (type == 2) { + /* 1Mb section. */ + phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); + ap = (desc >> 10) & 3; + code = 13; + *page_size = 1024 * 1024; + } else { + /* Lookup l2 entry. */ + if (type == 1) { + /* Coarse pagetable. */ + table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); + } else { + /* Fine pagetable. */ + table = (desc & 0xfffff000) | ((address >> 8) & 0xffc); + } + desc = arm_ldl_ptw(cs, table, regime_is_secure(env, mmu_idx)); + switch (desc & 3) { + case 0: /* Page translation fault. */ + code = 7; + goto do_fault; + case 1: /* 64k page. */ + phys_addr = (desc & 0xffff0000) | (address & 0xffff); + ap = (desc >> (4 + ((address >> 13) & 6))) & 3; + *page_size = 0x10000; + break; + case 2: /* 4k page. */ + phys_addr = (desc & 0xfffff000) | (address & 0xfff); + ap = (desc >> (4 + ((address >> 9) & 6))) & 3; + *page_size = 0x1000; + break; + case 3: /* 1k page, or ARMv6/XScale "extended small (4k) page" */ + if (type == 1) { + /* ARMv6/XScale extended small page format */ + if (arm_feature(env, ARM_FEATURE_XSCALE) + || arm_feature(env, ARM_FEATURE_V6)) { + phys_addr = (desc & 0xfffff000) | (address & 0xfff); + *page_size = 0x1000; + } else { + /* UNPREDICTABLE in ARMv5; we choose to take a + * page translation fault. + */ + code = 7; + goto do_fault; + } + } else { + phys_addr = (desc & 0xfffffc00) | (address & 0x3ff); + *page_size = 0x400; + } + ap = (desc >> 4) & 3; + break; + default: + /* Never happens, but compiler isn't smart enough to tell. */ + abort(); + } + code = 15; + } + *prot = ap_to_rw_prot(env, mmu_idx, ap, domain_prot); + *prot |= *prot ? PAGE_EXEC : 0; + if (!(*prot & (1 << access_type))) { + /* Access permission fault. */ + goto do_fault; + } + *phys_ptr = phys_addr; + return false; +do_fault: + *fsr = code | (domain << 4); + return true; +} + +static bool get_phys_addr_v6(CPUARMState *env, uint32_t address, + int access_type, ARMMMUIdx mmu_idx, + hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot, + target_ulong *page_size, uint32_t *fsr) +{ + CPUState *cs = CPU(arm_env_get_cpu(env)); + int code; + uint32_t table; + uint32_t desc; + uint32_t xn; + uint32_t pxn = 0; + int type; + int ap; + int domain = 0; + int domain_prot; + hwaddr phys_addr; + uint32_t dacr; + bool ns; + + /* Pagetable walk. */ + /* Lookup l1 descriptor. */ + if (!get_level1_table_address(env, mmu_idx, &table, address)) { + /* Section translation fault if page walk is disabled by PD0 or PD1 */ + code = 5; + goto do_fault; + } + desc = arm_ldl_ptw(cs, table, regime_is_secure(env, mmu_idx)); + type = (desc & 3); + if (type == 0 || (type == 3 && !arm_feature(env, ARM_FEATURE_PXN))) { + /* Section translation fault, or attempt to use the encoding + * which is Reserved on implementations without PXN. + */ + code = 5; + goto do_fault; + } + if ((type == 1) || !(desc & (1 << 18))) { + /* Page or Section. */ + domain = (desc >> 5) & 0x0f; + } + if (regime_el(env, mmu_idx) == 1) { + dacr = env->cp15.dacr_ns; + } else { + dacr = env->cp15.dacr_s; + } + domain_prot = (dacr >> (domain * 2)) & 3; + if (domain_prot == 0 || domain_prot == 2) { + if (type != 1) { + code = 9; /* Section domain fault. */ + } else { + code = 11; /* Page domain fault. */ + } + goto do_fault; + } + if (type != 1) { + if (desc & (1 << 18)) { + /* Supersection. */ + phys_addr = (desc & 0xff000000) | (address & 0x00ffffff); + phys_addr |= (uint64_t)extract32(desc, 20, 4) << 32; + phys_addr |= (uint64_t)extract32(desc, 5, 4) << 36; + *page_size = 0x1000000; + } else { + /* Section. */ + phys_addr = (desc & 0xfff00000) | (address & 0x000fffff); + *page_size = 0x100000; + } + ap = ((desc >> 10) & 3) | ((desc >> 13) & 4); + xn = desc & (1 << 4); + pxn = desc & 1; + code = 13; + ns = extract32(desc, 19, 1); + } else { + if (arm_feature(env, ARM_FEATURE_PXN)) { + pxn = (desc >> 2) & 1; + } + ns = extract32(desc, 3, 1); + /* Lookup l2 entry. */ + table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc); + desc = arm_ldl_ptw(cs, table, regime_is_secure(env, mmu_idx)); + ap = ((desc >> 4) & 3) | ((desc >> 7) & 4); + switch (desc & 3) { + case 0: /* Page translation fault. */ + code = 7; + goto do_fault; + case 1: /* 64k page. */ + phys_addr = (desc & 0xffff0000) | (address & 0xffff); + xn = desc & (1 << 15); + *page_size = 0x10000; + break; + case 2: case 3: /* 4k page. */ + phys_addr = (desc & 0xfffff000) | (address & 0xfff); + xn = desc & 1; + *page_size = 0x1000; + break; + default: + /* Never happens, but compiler isn't smart enough to tell. */ + abort(); + } + code = 15; + } + if (domain_prot == 3) { + *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; + } else { + if (pxn && !regime_is_user(env, mmu_idx)) { + xn = 1; + } + if (xn && access_type == 2) + goto do_fault; + + if (arm_feature(env, ARM_FEATURE_V6K) && + (regime_sctlr(env, mmu_idx) & SCTLR_AFE)) { + /* The simplified model uses AP[0] as an access control bit. */ + if ((ap & 1) == 0) { + /* Access flag fault. */ + code = (code == 15) ? 6 : 3; + goto do_fault; + } + *prot = simple_ap_to_rw_prot(env, mmu_idx, ap >> 1); + } else { + *prot = ap_to_rw_prot(env, mmu_idx, ap, domain_prot); + } + if (*prot && !xn) { + *prot |= PAGE_EXEC; + } + if (!(*prot & (1 << access_type))) { + /* Access permission fault. */ + goto do_fault; + } + } + if (ns) { + /* The NS bit will (as required by the architecture) have no effect if + * the CPU doesn't support TZ or this is a non-secure translation + * regime, because the attribute will already be non-secure. + */ + attrs->secure = false; + } + *phys_ptr = phys_addr; + return false; +do_fault: + *fsr = code | (domain << 4); + return true; +} + +/* Fault type for long-descriptor MMU fault reporting; this corresponds + * to bits [5..2] in the STATUS field in long-format DFSR/IFSR. + */ +typedef enum { + translation_fault = 1, + access_fault = 2, + permission_fault = 3, +} MMUFaultType; + +static bool get_phys_addr_lpae(CPUARMState *env, target_ulong address, + int access_type, ARMMMUIdx mmu_idx, + hwaddr *phys_ptr, MemTxAttrs *txattrs, int *prot, + target_ulong *page_size_ptr, uint32_t *fsr) +{ + CPUState *cs = CPU(arm_env_get_cpu(env)); + /* Read an LPAE long-descriptor translation table. */ + MMUFaultType fault_type = translation_fault; + uint32_t level = 1; + uint32_t epd; + int32_t tsz; + uint32_t tg; + uint64_t ttbr; + int ttbr_select; + hwaddr descaddr, descmask; + uint32_t tableattrs; + target_ulong page_size; + uint32_t attrs; + int32_t granule_sz = 9; + int32_t va_size = 32; + int32_t tbi = 0; + TCR *tcr = regime_tcr(env, mmu_idx); + int ap, ns, xn, pxn; + uint32_t el = regime_el(env, mmu_idx); + bool ttbr1_valid = true; + + /* TODO: + * This code does not handle the different format TCR for VTCR_EL2. + * This code also does not support shareability levels. + * Attribute and permission bit handling should also be checked when adding + * support for those page table walks. + */ + if (arm_el_is_aa64(env, el)) { + va_size = 64; + if (el > 1) { + tbi = extract64(tcr->raw_tcr, 20, 1); + } else { + if (extract64(address, 55, 1)) { + tbi = extract64(tcr->raw_tcr, 38, 1); + } else { + tbi = extract64(tcr->raw_tcr, 37, 1); + } + } + tbi *= 8; + + /* If we are in 64-bit EL2 or EL3 then there is no TTBR1, so mark it + * invalid. + */ + if (el > 1) { + ttbr1_valid = false; + } + } + + /* Determine whether this address is in the region controlled by + * TTBR0 or TTBR1 (or if it is in neither region and should fault). + * This is a Non-secure PL0/1 stage 1 translation, so controlled by + * TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32: + */ + uint32_t t0sz = extract32(tcr->raw_tcr, 0, 6); + if (va_size == 64) { + t0sz = MIN(t0sz, 39); + t0sz = MAX(t0sz, 16); + } + uint32_t t1sz = extract32(tcr->raw_tcr, 16, 6); + if (va_size == 64) { + t1sz = MIN(t1sz, 39); + t1sz = MAX(t1sz, 16); + } + if (t0sz && !extract64(address, va_size - t0sz, t0sz - tbi)) { + /* there is a ttbr0 region and we are in it (high bits all zero) */ + ttbr_select = 0; + } else if (ttbr1_valid && t1sz && + !extract64(~address, va_size - t1sz, t1sz - tbi)) { + /* there is a ttbr1 region and we are in it (high bits all one) */ + ttbr_select = 1; + } else if (!t0sz) { + /* ttbr0 region is "everything not in the ttbr1 region" */ + ttbr_select = 0; + } else if (!t1sz && ttbr1_valid) { + /* ttbr1 region is "everything not in the ttbr0 region" */ + ttbr_select = 1; + } else { + /* in the gap between the two regions, this is a Translation fault */ + fault_type = translation_fault; + goto do_fault; + } + + /* Note that QEMU ignores shareability and cacheability attributes, + * so we don't need to do anything with the SH, ORGN, IRGN fields + * in the TTBCR. Similarly, TTBCR:A1 selects whether we get the + * ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently + * implement any ASID-like capability so we can ignore it (instead + * we will always flush the TLB any time the ASID is changed). + */ + if (ttbr_select == 0) { + ttbr = regime_ttbr(env, mmu_idx, 0); + epd = extract32(tcr->raw_tcr, 7, 1); + tsz = t0sz; + + tg = extract32(tcr->raw_tcr, 14, 2); + if (tg == 1) { /* 64KB pages */ + granule_sz = 13; + } + if (tg == 2) { /* 16KB pages */ + granule_sz = 11; + } + } else { + /* We should only be here if TTBR1 is valid */ + assert(ttbr1_valid); + + ttbr = regime_ttbr(env, mmu_idx, 1); + epd = extract32(tcr->raw_tcr, 23, 1); + tsz = t1sz; + + tg = extract32(tcr->raw_tcr, 30, 2); + if (tg == 3) { /* 64KB pages */ + granule_sz = 13; + } + if (tg == 1) { /* 16KB pages */ + granule_sz = 11; + } + } + + /* Here we should have set up all the parameters for the translation: + * va_size, ttbr, epd, tsz, granule_sz, tbi + */ + + if (epd) { + /* Translation table walk disabled => Translation fault on TLB miss + * Note: This is always 0 on 64-bit EL2 and EL3. + */ + goto do_fault; + } + + /* The starting level depends on the virtual address size (which can be + * up to 48 bits) and the translation granule size. It indicates the number + * of strides (granule_sz bits at a time) needed to consume the bits + * of the input address. In the pseudocode this is: + * level = 4 - RoundUp((inputsize - grainsize) / stride) + * where their 'inputsize' is our 'va_size - tsz', 'grainsize' is + * our 'granule_sz + 3' and 'stride' is our 'granule_sz'. + * Applying the usual "rounded up m/n is (m+n-1)/n" and simplifying: + * = 4 - (va_size - tsz - granule_sz - 3 + granule_sz - 1) / granule_sz + * = 4 - (va_size - tsz - 4) / granule_sz; + */ + level = 4 - (va_size - tsz - 4) / granule_sz; + + /* Clear the vaddr bits which aren't part of the within-region address, + * so that we don't have to special case things when calculating the + * first descriptor address. + */ + if (tsz) { + address &= (1ULL << (va_size - tsz)) - 1; + } + + descmask = (1ULL << (granule_sz + 3)) - 1; + + /* Now we can extract the actual base address from the TTBR */ + descaddr = extract64(ttbr, 0, 48); + descaddr &= ~((1ULL << (va_size - tsz - (granule_sz * (4 - level)))) - 1); + + /* Secure accesses start with the page table in secure memory and + * can be downgraded to non-secure at any step. Non-secure accesses + * remain non-secure. We implement this by just ORing in the NSTable/NS + * bits at each step. + */ + tableattrs = regime_is_secure(env, mmu_idx) ? 0 : (1 << 4); + for (;;) { + uint64_t descriptor; + bool nstable; + + descaddr |= (address >> (granule_sz * (4 - level))) & descmask; + descaddr &= ~7ULL; + nstable = extract32(tableattrs, 4, 1); + descriptor = arm_ldq_ptw(cs, descaddr, !nstable); + if (!(descriptor & 1) || + (!(descriptor & 2) && (level == 3))) { + /* Invalid, or the Reserved level 3 encoding */ + goto do_fault; + } + descaddr = descriptor & 0xfffffff000ULL; + + if ((descriptor & 2) && (level < 3)) { + /* Table entry. The top five bits are attributes which may + * propagate down through lower levels of the table (and + * which are all arranged so that 0 means "no effect", so + * we can gather them up by ORing in the bits at each level). + */ + tableattrs |= extract64(descriptor, 59, 5); + level++; + continue; + } + /* Block entry at level 1 or 2, or page entry at level 3. + * These are basically the same thing, although the number + * of bits we pull in from the vaddr varies. + */ + page_size = (1ULL << ((granule_sz * (4 - level)) + 3)); + descaddr |= (address & (page_size - 1)); + /* Extract attributes from the descriptor and merge with table attrs */ + attrs = extract64(descriptor, 2, 10) + | (extract64(descriptor, 52, 12) << 10); + attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */ + attrs |= extract32(tableattrs, 3, 1) << 5; /* APTable[1] => AP[2] */ + /* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1 + * means "force PL1 access only", which means forcing AP[1] to 0. + */ + if (extract32(tableattrs, 2, 1)) { + attrs &= ~(1 << 4); + } + attrs |= nstable << 3; /* NS */ + break; + } + /* Here descaddr is the final physical address, and attributes + * are all in attrs. + */ + fault_type = access_fault; + if ((attrs & (1 << 8)) == 0) { + /* Access flag */ + goto do_fault; + } + + ap = extract32(attrs, 4, 2); + ns = extract32(attrs, 3, 1); + xn = extract32(attrs, 12, 1); + pxn = extract32(attrs, 11, 1); + + *prot = get_S1prot(env, mmu_idx, va_size == 64, ap, ns, xn, pxn); + + fault_type = permission_fault; + if (!(*prot & (1 << access_type))) { + goto do_fault; + } + + if (ns) { + /* The NS bit will (as required by the architecture) have no effect if + * the CPU doesn't support TZ or this is a non-secure translation + * regime, because the attribute will already be non-secure. + */ + txattrs->secure = false; + } + *phys_ptr = descaddr; + *page_size_ptr = page_size; + return false; + +do_fault: + /* Long-descriptor format IFSR/DFSR value */ + *fsr = (1 << 9) | (fault_type << 2) | level; + return true; +} + +static inline void get_phys_addr_pmsav7_default(CPUARMState *env, + ARMMMUIdx mmu_idx, + int32_t address, int *prot) +{ + *prot = PAGE_READ | PAGE_WRITE; + switch (address) { + case 0xF0000000 ... 0xFFFFFFFF: + if (regime_sctlr(env, mmu_idx) & SCTLR_V) { /* hivecs execing is ok */ + *prot |= PAGE_EXEC; + } + break; + case 0x00000000 ... 0x7FFFFFFF: + *prot |= PAGE_EXEC; + break; + } + +} + +static bool get_phys_addr_pmsav7(CPUARMState *env, uint32_t address, + int access_type, ARMMMUIdx mmu_idx, + hwaddr *phys_ptr, int *prot, uint32_t *fsr) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + int n; + bool is_user = regime_is_user(env, mmu_idx); + + *phys_ptr = address; + *prot = 0; + + if (regime_translation_disabled(env, mmu_idx)) { /* MPU disabled */ + get_phys_addr_pmsav7_default(env, mmu_idx, address, prot); + } else { /* MPU enabled */ + for (n = (int)cpu->pmsav7_dregion - 1; n >= 0; n--) { + /* region search */ + uint32_t base = env->pmsav7.drbar[n]; + uint32_t rsize = extract32(env->pmsav7.drsr[n], 1, 5); + uint32_t rmask; + bool srdis = false; + + if (!(env->pmsav7.drsr[n] & 0x1)) { + continue; + } + + if (!rsize) { + qemu_log_mask(LOG_GUEST_ERROR, "DRSR.Rsize field can not be 0"); + continue; + } + rsize++; + rmask = (1ull << rsize) - 1; + + if (base & rmask) { + qemu_log_mask(LOG_GUEST_ERROR, "DRBAR %" PRIx32 " misaligned " + "to DRSR region size, mask = %" PRIx32, + base, rmask); + continue; + } + + if (address < base || address > base + rmask) { + continue; + } + + /* Region matched */ + + if (rsize >= 8) { /* no subregions for regions < 256 bytes */ + int i, snd; + uint32_t srdis_mask; + + rsize -= 3; /* sub region size (power of 2) */ + snd = ((address - base) >> rsize) & 0x7; + srdis = extract32(env->pmsav7.drsr[n], snd + 8, 1); + + srdis_mask = srdis ? 0x3 : 0x0; + for (i = 2; i <= 8 && rsize < TARGET_PAGE_BITS; i *= 2) { + /* This will check in groups of 2, 4 and then 8, whether + * the subregion bits are consistent. rsize is incremented + * back up to give the region size, considering consistent + * adjacent subregions as one region. Stop testing if rsize + * is already big enough for an entire QEMU page. + */ + int snd_rounded = snd & ~(i - 1); + uint32_t srdis_multi = extract32(env->pmsav7.drsr[n], + snd_rounded + 8, i); + if (srdis_mask ^ srdis_multi) { + break; + } + srdis_mask = (srdis_mask << i) | srdis_mask; + rsize++; + } + } + if (rsize < TARGET_PAGE_BITS) { + qemu_log_mask(LOG_UNIMP, "No support for MPU (sub)region" + "alignment of %" PRIu32 " bits. Minimum is %d\n", + rsize, TARGET_PAGE_BITS); + continue; + } + if (srdis) { + continue; + } + break; + } + + if (n == -1) { /* no hits */ + if (cpu->pmsav7_dregion && + (is_user || !(regime_sctlr(env, mmu_idx) & SCTLR_BR))) { + /* background fault */ + *fsr = 0; + return true; + } + get_phys_addr_pmsav7_default(env, mmu_idx, address, prot); + } else { /* a MPU hit! */ + uint32_t ap = extract32(env->pmsav7.dracr[n], 8, 3); + + if (is_user) { /* User mode AP bit decoding */ + switch (ap) { + case 0: + case 1: + case 5: + break; /* no access */ + case 3: + *prot |= PAGE_WRITE; + /* fall through */ + case 2: + case 6: + *prot |= PAGE_READ | PAGE_EXEC; + break; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "Bad value for AP bits in DRACR %" + PRIx32 "\n", ap); + } + } else { /* Priv. mode AP bits decoding */ + switch (ap) { + case 0: + break; /* no access */ + case 1: + case 2: + case 3: + *prot |= PAGE_WRITE; + /* fall through */ + case 5: + case 6: + *prot |= PAGE_READ | PAGE_EXEC; + break; + default: + qemu_log_mask(LOG_GUEST_ERROR, + "Bad value for AP bits in DRACR %" + PRIx32 "\n", ap); + } + } + + /* execute never */ + if (env->pmsav7.dracr[n] & (1 << 12)) { + *prot &= ~PAGE_EXEC; + } + } + } + + *fsr = 0x00d; /* Permission fault */ + return !(*prot & (1 << access_type)); +} + +static bool get_phys_addr_pmsav5(CPUARMState *env, uint32_t address, + int access_type, ARMMMUIdx mmu_idx, + hwaddr *phys_ptr, int *prot, uint32_t *fsr) +{ + int n; + uint32_t mask; + uint32_t base; + bool is_user = regime_is_user(env, mmu_idx); + + *phys_ptr = address; + for (n = 7; n >= 0; n--) { + base = env->cp15.c6_region[n]; + if ((base & 1) == 0) { + continue; + } + mask = 1 << ((base >> 1) & 0x1f); + /* Keep this shift separate from the above to avoid an + (undefined) << 32. */ + mask = (mask << 1) - 1; + if (((base ^ address) & ~mask) == 0) { + break; + } + } + if (n < 0) { + *fsr = 2; + return true; + } + + if (access_type == 2) { + mask = env->cp15.pmsav5_insn_ap; + } else { + mask = env->cp15.pmsav5_data_ap; + } + mask = (mask >> (n * 4)) & 0xf; + switch (mask) { + case 0: + *fsr = 1; + return true; + case 1: + if (is_user) { + *fsr = 1; + return true; + } + *prot = PAGE_READ | PAGE_WRITE; + break; + case 2: + *prot = PAGE_READ; + if (!is_user) { + *prot |= PAGE_WRITE; + } + break; + case 3: + *prot = PAGE_READ | PAGE_WRITE; + break; + case 5: + if (is_user) { + *fsr = 1; + return true; + } + *prot = PAGE_READ; + break; + case 6: + *prot = PAGE_READ; + break; + default: + /* Bad permission. */ + *fsr = 1; + return true; + } + *prot |= PAGE_EXEC; + return false; +} + +/* get_phys_addr - get the physical address for this virtual address + * + * Find the physical address corresponding to the given virtual address, + * by doing a translation table walk on MMU based systems or using the + * MPU state on MPU based systems. + * + * Returns false if the translation was successful. Otherwise, phys_ptr, attrs, + * prot and page_size may not be filled in, and the populated fsr value provides + * information on why the translation aborted, in the format of a + * DFSR/IFSR fault register, with the following caveats: + * * we honour the short vs long DFSR format differences. + * * the WnR bit is never set (the caller must do this). + * * for PSMAv5 based systems we don't bother to return a full FSR format + * value. + * + * @env: CPUARMState + * @address: virtual address to get physical address for + * @access_type: 0 for read, 1 for write, 2 for execute + * @mmu_idx: MMU index indicating required translation regime + * @phys_ptr: set to the physical address corresponding to the virtual address + * @attrs: set to the memory transaction attributes to use + * @prot: set to the permissions for the page containing phys_ptr + * @page_size: set to the size of the page containing phys_ptr + * @fsr: set to the DFSR/IFSR value on failure + */ +static inline bool get_phys_addr(CPUARMState *env, target_ulong address, + int access_type, ARMMMUIdx mmu_idx, + hwaddr *phys_ptr, MemTxAttrs *attrs, int *prot, + target_ulong *page_size, uint32_t *fsr) +{ + if (mmu_idx == ARMMMUIdx_S12NSE0 || mmu_idx == ARMMMUIdx_S12NSE1) { + /* TODO: when we support EL2 we should here call ourselves recursively + * to do the stage 1 and then stage 2 translations. The arm_ld*_ptw + * functions will also need changing to perform ARMMMUIdx_S2NS loads + * rather than direct physical memory loads when appropriate. + * For non-EL2 CPUs a stage1+stage2 translation is just stage 1. + */ + assert(!arm_feature(env, ARM_FEATURE_EL2)); + mmu_idx += ARMMMUIdx_S1NSE0; + } + + /* The page table entries may downgrade secure to non-secure, but + * cannot upgrade an non-secure translation regime's attributes + * to secure. + */ + attrs->secure = regime_is_secure(env, mmu_idx); + attrs->user = regime_is_user(env, mmu_idx); + + /* Fast Context Switch Extension. This doesn't exist at all in v8. + * In v7 and earlier it affects all stage 1 translations. + */ + if (address < 0x02000000 && mmu_idx != ARMMMUIdx_S2NS + && !arm_feature(env, ARM_FEATURE_V8)) { + if (regime_el(env, mmu_idx) == 3) { + address += env->cp15.fcseidr_s; + } else { + address += env->cp15.fcseidr_ns; + } + } + + /* pmsav7 has special handling for when MPU is disabled so call it before + * the common MMU/MPU disabled check below. + */ + if (arm_feature(env, ARM_FEATURE_MPU) && + arm_feature(env, ARM_FEATURE_V7)) { + *page_size = TARGET_PAGE_SIZE; + return get_phys_addr_pmsav7(env, address, access_type, mmu_idx, + phys_ptr, prot, fsr); + } + + if (regime_translation_disabled(env, mmu_idx)) { + /* MMU/MPU disabled. */ + *phys_ptr = address; + *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; + *page_size = TARGET_PAGE_SIZE; + return 0; + } + + if (arm_feature(env, ARM_FEATURE_MPU)) { + /* Pre-v7 MPU */ + *page_size = TARGET_PAGE_SIZE; + return get_phys_addr_pmsav5(env, address, access_type, mmu_idx, + phys_ptr, prot, fsr); + } + + if (regime_using_lpae_format(env, mmu_idx)) { + return get_phys_addr_lpae(env, address, access_type, mmu_idx, phys_ptr, + attrs, prot, page_size, fsr); + } else if (regime_sctlr(env, mmu_idx) & SCTLR_XP) { + return get_phys_addr_v6(env, address, access_type, mmu_idx, phys_ptr, + attrs, prot, page_size, fsr); + } else { + return get_phys_addr_v5(env, address, access_type, mmu_idx, phys_ptr, + prot, page_size, fsr); + } +} + +/* Walk the page table and (if the mapping exists) add the page + * to the TLB. Return false on success, or true on failure. Populate + * fsr with ARM DFSR/IFSR fault register format value on failure. + */ +bool arm_tlb_fill(CPUState *cs, vaddr address, + int access_type, int mmu_idx, uint32_t *fsr) +{ + ARMCPU *cpu = ARM_CPU(cs); + CPUARMState *env = &cpu->env; + hwaddr phys_addr; + target_ulong page_size; + int prot; + int ret; + MemTxAttrs attrs = {}; + + ret = get_phys_addr(env, address, access_type, mmu_idx, &phys_addr, + &attrs, &prot, &page_size, fsr); + if (!ret) { + /* Map a single [sub]page. */ + phys_addr &= TARGET_PAGE_MASK; + address &= TARGET_PAGE_MASK; + tlb_set_page_with_attrs(cs, address, phys_addr, attrs, + prot, mmu_idx, page_size); + return 0; + } + + return ret; +} + +hwaddr arm_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) +{ + ARMCPU *cpu = ARM_CPU(cs); + CPUARMState *env = &cpu->env; + hwaddr phys_addr; + target_ulong page_size; + int prot; + bool ret; + uint32_t fsr; + MemTxAttrs attrs = {}; + + ret = get_phys_addr(env, addr, 0, cpu_mmu_index(env), &phys_addr, + &attrs, &prot, &page_size, &fsr); + + if (ret) { + return -1; + } + + return phys_addr; +} + +void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val) +{ + if ((env->uncached_cpsr & CPSR_M) == mode) { + env->regs[13] = val; + } else { + env->banked_r13[bank_number(mode)] = val; + } +} + +uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode) +{ + if ((env->uncached_cpsr & CPSR_M) == mode) { + return env->regs[13]; + } else { + return env->banked_r13[bank_number(mode)]; + } +} + +uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + switch (reg) { + case 0: /* APSR */ + return xpsr_read(env) & 0xf8000000; + case 1: /* IAPSR */ + return xpsr_read(env) & 0xf80001ff; + case 2: /* EAPSR */ + return xpsr_read(env) & 0xff00fc00; + case 3: /* xPSR */ + return xpsr_read(env) & 0xff00fdff; + case 5: /* IPSR */ + return xpsr_read(env) & 0x000001ff; + case 6: /* EPSR */ + return xpsr_read(env) & 0x0700fc00; + case 7: /* IEPSR */ + return xpsr_read(env) & 0x0700edff; + case 8: /* MSP */ + return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13]; + case 9: /* PSP */ + return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; + case 16: /* PRIMASK */ + return (env->daif & PSTATE_I) != 0; + case 17: /* BASEPRI */ + case 18: /* BASEPRI_MAX */ + return env->v7m.basepri; + case 19: /* FAULTMASK */ + return (env->daif & PSTATE_F) != 0; + case 20: /* CONTROL */ + return env->v7m.control; + default: + /* ??? For debugging only. */ + cpu_abort(CPU(cpu), "Unimplemented system register read (%d)\n", reg); + return 0; + } +} + +void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + + switch (reg) { + case 0: /* APSR */ + xpsr_write(env, val, 0xf8000000); + break; + case 1: /* IAPSR */ + xpsr_write(env, val, 0xf8000000); + break; + case 2: /* EAPSR */ + xpsr_write(env, val, 0xfe00fc00); + break; + case 3: /* xPSR */ + xpsr_write(env, val, 0xfe00fc00); + break; + case 5: /* IPSR */ + /* IPSR bits are readonly. */ + break; + case 6: /* EPSR */ + xpsr_write(env, val, 0x0600fc00); + break; + case 7: /* IEPSR */ + xpsr_write(env, val, 0x0600fc00); + break; + case 8: /* MSP */ + if (env->v7m.current_sp) + env->v7m.other_sp = val; + else + env->regs[13] = val; + break; + case 9: /* PSP */ + if (env->v7m.current_sp) + env->regs[13] = val; + else + env->v7m.other_sp = val; + break; + case 16: /* PRIMASK */ + if (val & 1) { + env->daif |= PSTATE_I; + } else { + env->daif &= ~PSTATE_I; + } + break; + case 17: /* BASEPRI */ + env->v7m.basepri = val & 0xff; + break; + case 18: /* BASEPRI_MAX */ + val &= 0xff; + if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) + env->v7m.basepri = val; + break; + case 19: /* FAULTMASK */ + if (val & 1) { + env->daif |= PSTATE_F; + } else { + env->daif &= ~PSTATE_F; + } + break; + case 20: /* CONTROL */ + env->v7m.control = val & 3; + switch_v7m_sp(env, (val & 2) != 0); + break; + default: + /* ??? For debugging only. */ + cpu_abort(CPU(cpu), "Unimplemented system register write (%d)\n", reg); + return; + } +} + +#endif + +void HELPER(dc_zva)(CPUARMState *env, uint64_t vaddr_in) +{ + /* Implement DC ZVA, which zeroes a fixed-length block of memory. + * Note that we do not implement the (architecturally mandated) + * alignment fault for attempts to use this on Device memory + * (which matches the usual QEMU behaviour of not implementing either + * alignment faults or any memory attribute handling). + */ + + ARMCPU *cpu = arm_env_get_cpu(env); + uint64_t blocklen = 4 << cpu->dcz_blocksize; + uint64_t vaddr = vaddr_in & ~(blocklen - 1); + +#ifndef CONFIG_USER_ONLY + { + /* Slightly awkwardly, QEMU's TARGET_PAGE_SIZE may be less than + * the block size so we might have to do more than one TLB lookup. + * We know that in fact for any v8 CPU the page size is at least 4K + * and the block size must be 2K or less, but TARGET_PAGE_SIZE is only + * 1K as an artefact of legacy v5 subpage support being present in the + * same QEMU executable. + */ + int maxidx = DIV_ROUND_UP(blocklen, TARGET_PAGE_SIZE); + void *hostaddr[maxidx]; + int try, i; + unsigned mmu_idx = cpu_mmu_index(env); + TCGMemOpIdx oi = make_memop_idx(MO_UB, mmu_idx); + + for (try = 0; try < 2; try++) { + + for (i = 0; i < maxidx; i++) { + hostaddr[i] = tlb_vaddr_to_host(env, + vaddr + TARGET_PAGE_SIZE * i, + 1, mmu_idx); + if (!hostaddr[i]) { + break; + } + } + if (i == maxidx) { + /* If it's all in the TLB it's fair game for just writing to; + * we know we don't need to update dirty status, etc. + */ + for (i = 0; i < maxidx - 1; i++) { + memset(hostaddr[i], 0, TARGET_PAGE_SIZE); + } + memset(hostaddr[i], 0, blocklen - (i * TARGET_PAGE_SIZE)); + return; + } + /* OK, try a store and see if we can populate the tlb. This + * might cause an exception if the memory isn't writable, + * in which case we will longjmp out of here. We must for + * this purpose use the actual register value passed to us + * so that we get the fault address right. + */ + helper_ret_stb_mmu(env, vaddr_in, 0, oi, GETRA()); + /* Now we can populate the other TLB entries, if any */ + for (i = 0; i < maxidx; i++) { + uint64_t va = vaddr + TARGET_PAGE_SIZE * i; + if (va != (vaddr_in & TARGET_PAGE_MASK)) { + helper_ret_stb_mmu(env, va, 0, oi, GETRA()); + } + } + } + + /* Slow path (probably attempt to do this to an I/O device or + * similar, or clearing of a block of code we have translations + * cached for). Just do a series of byte writes as the architecture + * demands. It's not worth trying to use a cpu_physical_memory_map(), + * memset(), unmap() sequence here because: + * + we'd need to account for the blocksize being larger than a page + * + the direct-RAM access case is almost always going to be dealt + * with in the fastpath code above, so there's no speed benefit + * + we would have to deal with the map returning NULL because the + * bounce buffer was in use + */ + for (i = 0; i < blocklen; i++) { + helper_ret_stb_mmu(env, vaddr + i, 0, oi, GETRA()); + } + } +#else + memset(g2h(vaddr), 0, blocklen); +#endif +} + +/* Note that signed overflow is undefined in C. The following routines are + careful to use unsigned types where modulo arithmetic is required. + Failure to do so _will_ break on newer gcc. */ + +/* Signed saturating arithmetic. */ + +/* Perform 16-bit signed saturating addition. */ +static inline uint16_t add16_sat(uint16_t a, uint16_t b) +{ + uint16_t res; + + res = a + b; + if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) { + if (a & 0x8000) + res = 0x8000; + else + res = 0x7fff; + } + return res; +} + +/* Perform 8-bit signed saturating addition. */ +static inline uint8_t add8_sat(uint8_t a, uint8_t b) +{ + uint8_t res; + + res = a + b; + if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) { + if (a & 0x80) + res = 0x80; + else + res = 0x7f; + } + return res; +} + +/* Perform 16-bit signed saturating subtraction. */ +static inline uint16_t sub16_sat(uint16_t a, uint16_t b) +{ + uint16_t res; + + res = a - b; + if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) { + if (a & 0x8000) + res = 0x8000; + else + res = 0x7fff; + } + return res; +} + +/* Perform 8-bit signed saturating subtraction. */ +static inline uint8_t sub8_sat(uint8_t a, uint8_t b) +{ + uint8_t res; + + res = a - b; + if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) { + if (a & 0x80) + res = 0x80; + else + res = 0x7f; + } + return res; +} + +#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16); +#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16); +#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8); +#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8); +#define PFX q + +#include "op_addsub.h" + +/* Unsigned saturating arithmetic. */ +static inline uint16_t add16_usat(uint16_t a, uint16_t b) +{ + uint16_t res; + res = a + b; + if (res < a) + res = 0xffff; + return res; +} + +static inline uint16_t sub16_usat(uint16_t a, uint16_t b) +{ + if (a > b) + return a - b; + else + return 0; +} + +static inline uint8_t add8_usat(uint8_t a, uint8_t b) +{ + uint8_t res; + res = a + b; + if (res < a) + res = 0xff; + return res; +} + +static inline uint8_t sub8_usat(uint8_t a, uint8_t b) +{ + if (a > b) + return a - b; + else + return 0; +} + +#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16); +#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16); +#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8); +#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8); +#define PFX uq + +#include "op_addsub.h" + +/* Signed modulo arithmetic. */ +#define SARITH16(a, b, n, op) do { \ + int32_t sum; \ + sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \ + RESULT(sum, n, 16); \ + if (sum >= 0) \ + ge |= 3 << (n * 2); \ + } while(0) + +#define SARITH8(a, b, n, op) do { \ + int32_t sum; \ + sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \ + RESULT(sum, n, 8); \ + if (sum >= 0) \ + ge |= 1 << n; \ + } while(0) + + +#define ADD16(a, b, n) SARITH16(a, b, n, +) +#define SUB16(a, b, n) SARITH16(a, b, n, -) +#define ADD8(a, b, n) SARITH8(a, b, n, +) +#define SUB8(a, b, n) SARITH8(a, b, n, -) +#define PFX s +#define ARITH_GE + +#include "op_addsub.h" + +/* Unsigned modulo arithmetic. */ +#define ADD16(a, b, n) do { \ + uint32_t sum; \ + sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \ + RESULT(sum, n, 16); \ + if ((sum >> 16) == 1) \ + ge |= 3 << (n * 2); \ + } while(0) + +#define ADD8(a, b, n) do { \ + uint32_t sum; \ + sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \ + RESULT(sum, n, 8); \ + if ((sum >> 8) == 1) \ + ge |= 1 << n; \ + } while(0) + +#define SUB16(a, b, n) do { \ + uint32_t sum; \ + sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \ + RESULT(sum, n, 16); \ + if ((sum >> 16) == 0) \ + ge |= 3 << (n * 2); \ + } while(0) + +#define SUB8(a, b, n) do { \ + uint32_t sum; \ + sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \ + RESULT(sum, n, 8); \ + if ((sum >> 8) == 0) \ + ge |= 1 << n; \ + } while(0) + +#define PFX u +#define ARITH_GE + +#include "op_addsub.h" + +/* Halved signed arithmetic. */ +#define ADD16(a, b, n) \ + RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16) +#define SUB16(a, b, n) \ + RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16) +#define ADD8(a, b, n) \ + RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8) +#define SUB8(a, b, n) \ + RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8) +#define PFX sh + +#include "op_addsub.h" + +/* Halved unsigned arithmetic. */ +#define ADD16(a, b, n) \ + RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16) +#define SUB16(a, b, n) \ + RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16) +#define ADD8(a, b, n) \ + RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8) +#define SUB8(a, b, n) \ + RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8) +#define PFX uh + +#include "op_addsub.h" + +static inline uint8_t do_usad(uint8_t a, uint8_t b) +{ + if (a > b) + return a - b; + else + return b - a; +} + +/* Unsigned sum of absolute byte differences. */ +uint32_t HELPER(usad8)(uint32_t a, uint32_t b) +{ + uint32_t sum; + sum = do_usad(a, b); + sum += do_usad(a >> 8, b >> 8); + sum += do_usad(a >> 16, b >>16); + sum += do_usad(a >> 24, b >> 24); + return sum; +} + +/* For ARMv6 SEL instruction. */ +uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b) +{ + uint32_t mask; + + mask = 0; + if (flags & 1) + mask |= 0xff; + if (flags & 2) + mask |= 0xff00; + if (flags & 4) + mask |= 0xff0000; + if (flags & 8) + mask |= 0xff000000; + return (a & mask) | (b & ~mask); +} + +/* VFP support. We follow the convention used for VFP instructions: + Single precision routines have a "s" suffix, double precision a + "d" suffix. */ + +/* Convert host exception flags to vfp form. */ +static inline int vfp_exceptbits_from_host(int host_bits) +{ + int target_bits = 0; + + if (host_bits & float_flag_invalid) + target_bits |= 1; + if (host_bits & float_flag_divbyzero) + target_bits |= 2; + if (host_bits & float_flag_overflow) + target_bits |= 4; + if (host_bits & (float_flag_underflow | float_flag_output_denormal)) + target_bits |= 8; + if (host_bits & float_flag_inexact) + target_bits |= 0x10; + if (host_bits & float_flag_input_denormal) + target_bits |= 0x80; + return target_bits; +} + +uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env) +{ + int i; + uint32_t fpscr; + + fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff) + | (env->vfp.vec_len << 16) + | (env->vfp.vec_stride << 20); + i = get_float_exception_flags(&env->vfp.fp_status); + i |= get_float_exception_flags(&env->vfp.standard_fp_status); + fpscr |= vfp_exceptbits_from_host(i); + return fpscr; +} + +uint32_t vfp_get_fpscr(CPUARMState *env) +{ + return HELPER(vfp_get_fpscr)(env); +} + +/* Convert vfp exception flags to target form. */ +static inline int vfp_exceptbits_to_host(int target_bits) +{ + int host_bits = 0; + + if (target_bits & 1) + host_bits |= float_flag_invalid; + if (target_bits & 2) + host_bits |= float_flag_divbyzero; + if (target_bits & 4) + host_bits |= float_flag_overflow; + if (target_bits & 8) + host_bits |= float_flag_underflow; + if (target_bits & 0x10) + host_bits |= float_flag_inexact; + if (target_bits & 0x80) + host_bits |= float_flag_input_denormal; + return host_bits; +} + +void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val) +{ + int i; + uint32_t changed; + + changed = env->vfp.xregs[ARM_VFP_FPSCR]; + env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff); + env->vfp.vec_len = (val >> 16) & 7; + env->vfp.vec_stride = (val >> 20) & 3; + + changed ^= val; + if (changed & (3 << 22)) { + i = (val >> 22) & 3; + switch (i) { + case FPROUNDING_TIEEVEN: + i = float_round_nearest_even; + break; + case FPROUNDING_POSINF: + i = float_round_up; + break; + case FPROUNDING_NEGINF: + i = float_round_down; + break; + case FPROUNDING_ZERO: + i = float_round_to_zero; + break; + } + set_float_rounding_mode(i, &env->vfp.fp_status); + } + if (changed & (1 << 24)) { + set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); + set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status); + } + if (changed & (1 << 25)) + set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status); + + i = vfp_exceptbits_to_host(val); + set_float_exception_flags(i, &env->vfp.fp_status); + set_float_exception_flags(0, &env->vfp.standard_fp_status); +} + +void vfp_set_fpscr(CPUARMState *env, uint32_t val) +{ + HELPER(vfp_set_fpscr)(env, val); +} + +#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p)) + +#define VFP_BINOP(name) \ +float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \ +{ \ + float_status *fpst = fpstp; \ + return float32_ ## name(a, b, fpst); \ +} \ +float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \ +{ \ + float_status *fpst = fpstp; \ + return float64_ ## name(a, b, fpst); \ +} +VFP_BINOP(add) +VFP_BINOP(sub) +VFP_BINOP(mul) +VFP_BINOP(div) +VFP_BINOP(min) +VFP_BINOP(max) +VFP_BINOP(minnum) +VFP_BINOP(maxnum) +#undef VFP_BINOP + +float32 VFP_HELPER(neg, s)(float32 a) +{ + return float32_chs(a); +} + +float64 VFP_HELPER(neg, d)(float64 a) +{ + return float64_chs(a); +} + +float32 VFP_HELPER(abs, s)(float32 a) +{ + return float32_abs(a); +} + +float64 VFP_HELPER(abs, d)(float64 a) +{ + return float64_abs(a); +} + +float32 VFP_HELPER(sqrt, s)(float32 a, CPUARMState *env) +{ + return float32_sqrt(a, &env->vfp.fp_status); +} + +float64 VFP_HELPER(sqrt, d)(float64 a, CPUARMState *env) +{ + return float64_sqrt(a, &env->vfp.fp_status); +} + +/* XXX: check quiet/signaling case */ +#define DO_VFP_cmp(p, type) \ +void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \ +{ \ + uint32_t flags; \ + switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \ + case 0: flags = 0x6; break; \ + case -1: flags = 0x8; break; \ + case 1: flags = 0x2; break; \ + default: case 2: flags = 0x3; break; \ + } \ + env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \ + | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \ +} \ +void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \ +{ \ + uint32_t flags; \ + switch(type ## _compare(a, b, &env->vfp.fp_status)) { \ + case 0: flags = 0x6; break; \ + case -1: flags = 0x8; break; \ + case 1: flags = 0x2; break; \ + default: case 2: flags = 0x3; break; \ + } \ + env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \ + | (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \ +} +DO_VFP_cmp(s, float32) +DO_VFP_cmp(d, float64) +#undef DO_VFP_cmp + +/* Integer to float and float to integer conversions */ + +#define CONV_ITOF(name, fsz, sign) \ + float##fsz HELPER(name)(uint32_t x, void *fpstp) \ +{ \ + float_status *fpst = fpstp; \ + return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \ +} + +#define CONV_FTOI(name, fsz, sign, round) \ +uint32_t HELPER(name)(float##fsz x, void *fpstp) \ +{ \ + float_status *fpst = fpstp; \ + if (float##fsz##_is_any_nan(x)) { \ + float_raise(float_flag_invalid, fpst); \ + return 0; \ + } \ + return float##fsz##_to_##sign##int32##round(x, fpst); \ +} + +#define FLOAT_CONVS(name, p, fsz, sign) \ +CONV_ITOF(vfp_##name##to##p, fsz, sign) \ +CONV_FTOI(vfp_to##name##p, fsz, sign, ) \ +CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero) + +FLOAT_CONVS(si, s, 32, ) +FLOAT_CONVS(si, d, 64, ) +FLOAT_CONVS(ui, s, 32, u) +FLOAT_CONVS(ui, d, 64, u) + +#undef CONV_ITOF +#undef CONV_FTOI +#undef FLOAT_CONVS + +/* floating point conversion */ +float64 VFP_HELPER(fcvtd, s)(float32 x, CPUARMState *env) +{ + float64 r = float32_to_float64(x, &env->vfp.fp_status); + /* ARM requires that S<->D conversion of any kind of NaN generates + * a quiet NaN by forcing the most significant frac bit to 1. + */ + return float64_maybe_silence_nan(r); +} + +float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env) +{ + float32 r = float64_to_float32(x, &env->vfp.fp_status); + /* ARM requires that S<->D conversion of any kind of NaN generates + * a quiet NaN by forcing the most significant frac bit to 1. + */ + return float32_maybe_silence_nan(r); +} + +/* VFP3 fixed point conversion. */ +#define VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \ +float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t x, uint32_t shift, \ + void *fpstp) \ +{ \ + float_status *fpst = fpstp; \ + float##fsz tmp; \ + tmp = itype##_to_##float##fsz(x, fpst); \ + return float##fsz##_scalbn(tmp, -(int)shift, fpst); \ +} + +/* Notice that we want only input-denormal exception flags from the + * scalbn operation: the other possible flags (overflow+inexact if + * we overflow to infinity, output-denormal) aren't correct for the + * complete scale-and-convert operation. + */ +#define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, round) \ +uint##isz##_t HELPER(vfp_to##name##p##round)(float##fsz x, \ + uint32_t shift, \ + void *fpstp) \ +{ \ + float_status *fpst = fpstp; \ + int old_exc_flags = get_float_exception_flags(fpst); \ + float##fsz tmp; \ + if (float##fsz##_is_any_nan(x)) { \ + float_raise(float_flag_invalid, fpst); \ + return 0; \ + } \ + tmp = float##fsz##_scalbn(x, shift, fpst); \ + old_exc_flags |= get_float_exception_flags(fpst) \ + & float_flag_input_denormal; \ + set_float_exception_flags(old_exc_flags, fpst); \ + return float##fsz##_to_##itype##round(tmp, fpst); \ +} + +#define VFP_CONV_FIX(name, p, fsz, isz, itype) \ +VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \ +VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, _round_to_zero) \ +VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, ) + +#define VFP_CONV_FIX_A64(name, p, fsz, isz, itype) \ +VFP_CONV_FIX_FLOAT(name, p, fsz, isz, itype) \ +VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, ) + +VFP_CONV_FIX(sh, d, 64, 64, int16) +VFP_CONV_FIX(sl, d, 64, 64, int32) +VFP_CONV_FIX_A64(sq, d, 64, 64, int64) +VFP_CONV_FIX(uh, d, 64, 64, uint16) +VFP_CONV_FIX(ul, d, 64, 64, uint32) +VFP_CONV_FIX_A64(uq, d, 64, 64, uint64) +VFP_CONV_FIX(sh, s, 32, 32, int16) +VFP_CONV_FIX(sl, s, 32, 32, int32) +VFP_CONV_FIX_A64(sq, s, 32, 64, int64) +VFP_CONV_FIX(uh, s, 32, 32, uint16) +VFP_CONV_FIX(ul, s, 32, 32, uint32) +VFP_CONV_FIX_A64(uq, s, 32, 64, uint64) +#undef VFP_CONV_FIX +#undef VFP_CONV_FIX_FLOAT +#undef VFP_CONV_FLOAT_FIX_ROUND + +/* Set the current fp rounding mode and return the old one. + * The argument is a softfloat float_round_ value. + */ +uint32_t HELPER(set_rmode)(uint32_t rmode, CPUARMState *env) +{ + float_status *fp_status = &env->vfp.fp_status; + + uint32_t prev_rmode = get_float_rounding_mode(fp_status); + set_float_rounding_mode(rmode, fp_status); + + return prev_rmode; +} + +/* Set the current fp rounding mode in the standard fp status and return + * the old one. This is for NEON instructions that need to change the + * rounding mode but wish to use the standard FPSCR values for everything + * else. Always set the rounding mode back to the correct value after + * modifying it. + * The argument is a softfloat float_round_ value. + */ +uint32_t HELPER(set_neon_rmode)(uint32_t rmode, CPUARMState *env) +{ + float_status *fp_status = &env->vfp.standard_fp_status; + + uint32_t prev_rmode = get_float_rounding_mode(fp_status); + set_float_rounding_mode(rmode, fp_status); + + return prev_rmode; +} + +/* Half precision conversions. */ +static float32 do_fcvt_f16_to_f32(uint32_t a, CPUARMState *env, float_status *s) +{ + int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; + float32 r = float16_to_float32(make_float16(a), ieee, s); + if (ieee) { + return float32_maybe_silence_nan(r); + } + return r; +} + +static uint32_t do_fcvt_f32_to_f16(float32 a, CPUARMState *env, float_status *s) +{ + int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; + float16 r = float32_to_float16(a, ieee, s); + if (ieee) { + r = float16_maybe_silence_nan(r); + } + return float16_val(r); +} + +float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env) +{ + return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status); +} + +uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUARMState *env) +{ + return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status); +} + +float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env) +{ + return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status); +} + +uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUARMState *env) +{ + return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status); +} + +float64 HELPER(vfp_fcvt_f16_to_f64)(uint32_t a, CPUARMState *env) +{ + int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; + float64 r = float16_to_float64(make_float16(a), ieee, &env->vfp.fp_status); + if (ieee) { + return float64_maybe_silence_nan(r); + } + return r; +} + +uint32_t HELPER(vfp_fcvt_f64_to_f16)(float64 a, CPUARMState *env) +{ + int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0; + float16 r = float64_to_float16(a, ieee, &env->vfp.fp_status); + if (ieee) { + r = float16_maybe_silence_nan(r); + } + return float16_val(r); +} + +#define float32_two make_float32(0x40000000) +#define float32_three make_float32(0x40400000) +#define float32_one_point_five make_float32(0x3fc00000) + +float32 HELPER(recps_f32)(float32 a, float32 b, CPUARMState *env) +{ + float_status *s = &env->vfp.standard_fp_status; + if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) || + (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { + if (!(float32_is_zero(a) || float32_is_zero(b))) { + float_raise(float_flag_input_denormal, s); + } + return float32_two; + } + return float32_sub(float32_two, float32_mul(a, b, s), s); +} + +float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env) +{ + float_status *s = &env->vfp.standard_fp_status; + float32 product; + if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) || + (float32_is_infinity(b) && float32_is_zero_or_denormal(a))) { + if (!(float32_is_zero(a) || float32_is_zero(b))) { + float_raise(float_flag_input_denormal, s); + } + return float32_one_point_five; + } + product = float32_mul(a, b, s); + return float32_div(float32_sub(float32_three, product, s), float32_two, s); +} + +/* NEON helpers. */ + +/* Constants 256 and 512 are used in some helpers; we avoid relying on + * int->float conversions at run-time. */ +#define float64_256 make_float64(0x4070000000000000LL) +#define float64_512 make_float64(0x4080000000000000LL) +#define float32_maxnorm make_float32(0x7f7fffff) +#define float64_maxnorm make_float64(0x7fefffffffffffffLL) + +/* Reciprocal functions + * + * The algorithm that must be used to calculate the estimate + * is specified by the ARM ARM, see FPRecipEstimate() + */ + +static float64 recip_estimate(float64 a, float_status *real_fp_status) +{ + /* These calculations mustn't set any fp exception flags, + * so we use a local copy of the fp_status. + */ + float_status dummy_status = *real_fp_status; + float_status *s = &dummy_status; + /* q = (int)(a * 512.0) */ + float64 q = float64_mul(float64_512, a, s); + int64_t q_int = float64_to_int64_round_to_zero(q, s); + + /* r = 1.0 / (((double)q + 0.5) / 512.0) */ + q = int64_to_float64(q_int, s); + q = float64_add(q, float64_half, s); + q = float64_div(q, float64_512, s); + q = float64_div(float64_one, q, s); + + /* s = (int)(256.0 * r + 0.5) */ + q = float64_mul(q, float64_256, s); + q = float64_add(q, float64_half, s); + q_int = float64_to_int64_round_to_zero(q, s); + + /* return (double)s / 256.0 */ + return float64_div(int64_to_float64(q_int, s), float64_256, s); +} + +/* Common wrapper to call recip_estimate */ +static float64 call_recip_estimate(float64 num, int off, float_status *fpst) +{ + uint64_t val64 = float64_val(num); + uint64_t frac = extract64(val64, 0, 52); + int64_t exp = extract64(val64, 52, 11); + uint64_t sbit; + float64 scaled, estimate; + + /* Generate the scaled number for the estimate function */ + if (exp == 0) { + if (extract64(frac, 51, 1) == 0) { + exp = -1; + frac = extract64(frac, 0, 50) << 2; + } else { + frac = extract64(frac, 0, 51) << 1; + } + } + + /* scaled = '0' : '01111111110' : fraction<51:44> : Zeros(44); */ + scaled = make_float64((0x3feULL << 52) + | extract64(frac, 44, 8) << 44); + + estimate = recip_estimate(scaled, fpst); + + /* Build new result */ + val64 = float64_val(estimate); + sbit = 0x8000000000000000ULL & val64; + exp = off - exp; + frac = extract64(val64, 0, 52); + + if (exp == 0) { + frac = 1ULL << 51 | extract64(frac, 1, 51); + } else if (exp == -1) { + frac = 1ULL << 50 | extract64(frac, 2, 50); + exp = 0; + } + + return make_float64(sbit | (exp << 52) | frac); +} + +static bool round_to_inf(float_status *fpst, bool sign_bit) +{ + switch (fpst->float_rounding_mode) { + case float_round_nearest_even: /* Round to Nearest */ + return true; + case float_round_up: /* Round to +Inf */ + return !sign_bit; + case float_round_down: /* Round to -Inf */ + return sign_bit; + case float_round_to_zero: /* Round to Zero */ + return false; + } + + g_assert_not_reached(); +} + +float32 HELPER(recpe_f32)(float32 input, void *fpstp) +{ + float_status *fpst = fpstp; + float32 f32 = float32_squash_input_denormal(input, fpst); + uint32_t f32_val = float32_val(f32); + uint32_t f32_sbit = 0x80000000ULL & f32_val; + int32_t f32_exp = extract32(f32_val, 23, 8); + uint32_t f32_frac = extract32(f32_val, 0, 23); + float64 f64, r64; + uint64_t r64_val; + int64_t r64_exp; + uint64_t r64_frac; + + if (float32_is_any_nan(f32)) { + float32 nan = f32; + if (float32_is_signaling_nan(f32)) { + float_raise(float_flag_invalid, fpst); + nan = float32_maybe_silence_nan(f32); + } + if (fpst->default_nan_mode) { + nan = float32_default_nan; + } + return nan; + } else if (float32_is_infinity(f32)) { + return float32_set_sign(float32_zero, float32_is_neg(f32)); + } else if (float32_is_zero(f32)) { + float_raise(float_flag_divbyzero, fpst); + return float32_set_sign(float32_infinity, float32_is_neg(f32)); + } else if ((f32_val & ~(1ULL << 31)) < (1ULL << 21)) { + /* Abs(value) < 2.0^-128 */ + float_raise(float_flag_overflow | float_flag_inexact, fpst); + if (round_to_inf(fpst, f32_sbit)) { + return float32_set_sign(float32_infinity, float32_is_neg(f32)); + } else { + return float32_set_sign(float32_maxnorm, float32_is_neg(f32)); + } + } else if (f32_exp >= 253 && fpst->flush_to_zero) { + float_raise(float_flag_underflow, fpst); + return float32_set_sign(float32_zero, float32_is_neg(f32)); + } + + + f64 = make_float64(((int64_t)(f32_exp) << 52) | (int64_t)(f32_frac) << 29); + r64 = call_recip_estimate(f64, 253, fpst); + r64_val = float64_val(r64); + r64_exp = extract64(r64_val, 52, 11); + r64_frac = extract64(r64_val, 0, 52); + + /* result = sign : result_exp<7:0> : fraction<51:29>; */ + return make_float32(f32_sbit | + (r64_exp & 0xff) << 23 | + extract64(r64_frac, 29, 24)); +} + +float64 HELPER(recpe_f64)(float64 input, void *fpstp) +{ + float_status *fpst = fpstp; + float64 f64 = float64_squash_input_denormal(input, fpst); + uint64_t f64_val = float64_val(f64); + uint64_t f64_sbit = 0x8000000000000000ULL & f64_val; + int64_t f64_exp = extract64(f64_val, 52, 11); + float64 r64; + uint64_t r64_val; + int64_t r64_exp; + uint64_t r64_frac; + + /* Deal with any special cases */ + if (float64_is_any_nan(f64)) { + float64 nan = f64; + if (float64_is_signaling_nan(f64)) { + float_raise(float_flag_invalid, fpst); + nan = float64_maybe_silence_nan(f64); + } + if (fpst->default_nan_mode) { + nan = float64_default_nan; + } + return nan; + } else if (float64_is_infinity(f64)) { + return float64_set_sign(float64_zero, float64_is_neg(f64)); + } else if (float64_is_zero(f64)) { + float_raise(float_flag_divbyzero, fpst); + return float64_set_sign(float64_infinity, float64_is_neg(f64)); + } else if ((f64_val & ~(1ULL << 63)) < (1ULL << 50)) { + /* Abs(value) < 2.0^-1024 */ + float_raise(float_flag_overflow | float_flag_inexact, fpst); + if (round_to_inf(fpst, f64_sbit)) { + return float64_set_sign(float64_infinity, float64_is_neg(f64)); + } else { + return float64_set_sign(float64_maxnorm, float64_is_neg(f64)); + } + } else if (f64_exp >= 2045 && fpst->flush_to_zero) { + float_raise(float_flag_underflow, fpst); + return float64_set_sign(float64_zero, float64_is_neg(f64)); + } + + r64 = call_recip_estimate(f64, 2045, fpst); + r64_val = float64_val(r64); + r64_exp = extract64(r64_val, 52, 11); + r64_frac = extract64(r64_val, 0, 52); + + /* result = sign : result_exp<10:0> : fraction<51:0> */ + return make_float64(f64_sbit | + ((r64_exp & 0x7ff) << 52) | + r64_frac); +} + +/* The algorithm that must be used to calculate the estimate + * is specified by the ARM ARM. + */ +static float64 recip_sqrt_estimate(float64 a, float_status *real_fp_status) +{ + /* These calculations mustn't set any fp exception flags, + * so we use a local copy of the fp_status. + */ + float_status dummy_status = *real_fp_status; + float_status *s = &dummy_status; + float64 q; + int64_t q_int; + + if (float64_lt(a, float64_half, s)) { + /* range 0.25 <= a < 0.5 */ + + /* a in units of 1/512 rounded down */ + /* q0 = (int)(a * 512.0); */ + q = float64_mul(float64_512, a, s); + q_int = float64_to_int64_round_to_zero(q, s); + + /* reciprocal root r */ + /* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */ + q = int64_to_float64(q_int, s); + q = float64_add(q, float64_half, s); + q = float64_div(q, float64_512, s); + q = float64_sqrt(q, s); + q = float64_div(float64_one, q, s); + } else { + /* range 0.5 <= a < 1.0 */ + + /* a in units of 1/256 rounded down */ + /* q1 = (int)(a * 256.0); */ + q = float64_mul(float64_256, a, s); + int64_t q_int = float64_to_int64_round_to_zero(q, s); + + /* reciprocal root r */ + /* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */ + q = int64_to_float64(q_int, s); + q = float64_add(q, float64_half, s); + q = float64_div(q, float64_256, s); + q = float64_sqrt(q, s); + q = float64_div(float64_one, q, s); + } + /* r in units of 1/256 rounded to nearest */ + /* s = (int)(256.0 * r + 0.5); */ + + q = float64_mul(q, float64_256,s ); + q = float64_add(q, float64_half, s); + q_int = float64_to_int64_round_to_zero(q, s); + + /* return (double)s / 256.0;*/ + return float64_div(int64_to_float64(q_int, s), float64_256, s); +} + +float32 HELPER(rsqrte_f32)(float32 input, void *fpstp) +{ + float_status *s = fpstp; + float32 f32 = float32_squash_input_denormal(input, s); + uint32_t val = float32_val(f32); + uint32_t f32_sbit = 0x80000000 & val; + int32_t f32_exp = extract32(val, 23, 8); + uint32_t f32_frac = extract32(val, 0, 23); + uint64_t f64_frac; + uint64_t val64; + int result_exp; + float64 f64; + + if (float32_is_any_nan(f32)) { + float32 nan = f32; + if (float32_is_signaling_nan(f32)) { + float_raise(float_flag_invalid, s); + nan = float32_maybe_silence_nan(f32); + } + if (s->default_nan_mode) { + nan = float32_default_nan; + } + return nan; + } else if (float32_is_zero(f32)) { + float_raise(float_flag_divbyzero, s); + return float32_set_sign(float32_infinity, float32_is_neg(f32)); + } else if (float32_is_neg(f32)) { + float_raise(float_flag_invalid, s); + return float32_default_nan; + } else if (float32_is_infinity(f32)) { + return float32_zero; + } + + /* Scale and normalize to a double-precision value between 0.25 and 1.0, + * preserving the parity of the exponent. */ + + f64_frac = ((uint64_t) f32_frac) << 29; + if (f32_exp == 0) { + while (extract64(f64_frac, 51, 1) == 0) { + f64_frac = f64_frac << 1; + f32_exp = f32_exp-1; + } + f64_frac = extract64(f64_frac, 0, 51) << 1; + } + + if (extract64(f32_exp, 0, 1) == 0) { + f64 = make_float64(((uint64_t) f32_sbit) << 32 + | (0x3feULL << 52) + | f64_frac); + } else { + f64 = make_float64(((uint64_t) f32_sbit) << 32 + | (0x3fdULL << 52) + | f64_frac); + } + + result_exp = (380 - f32_exp) / 2; + + f64 = recip_sqrt_estimate(f64, s); + + val64 = float64_val(f64); + + val = ((result_exp & 0xff) << 23) + | ((val64 >> 29) & 0x7fffff); + return make_float32(val); +} + +float64 HELPER(rsqrte_f64)(float64 input, void *fpstp) +{ + float_status *s = fpstp; + float64 f64 = float64_squash_input_denormal(input, s); + uint64_t val = float64_val(f64); + uint64_t f64_sbit = 0x8000000000000000ULL & val; + int64_t f64_exp = extract64(val, 52, 11); + uint64_t f64_frac = extract64(val, 0, 52); + int64_t result_exp; + uint64_t result_frac; + + if (float64_is_any_nan(f64)) { + float64 nan = f64; + if (float64_is_signaling_nan(f64)) { + float_raise(float_flag_invalid, s); + nan = float64_maybe_silence_nan(f64); + } + if (s->default_nan_mode) { + nan = float64_default_nan; + } + return nan; + } else if (float64_is_zero(f64)) { + float_raise(float_flag_divbyzero, s); + return float64_set_sign(float64_infinity, float64_is_neg(f64)); + } else if (float64_is_neg(f64)) { + float_raise(float_flag_invalid, s); + return float64_default_nan; + } else if (float64_is_infinity(f64)) { + return float64_zero; + } + + /* Scale and normalize to a double-precision value between 0.25 and 1.0, + * preserving the parity of the exponent. */ + + if (f64_exp == 0) { + while (extract64(f64_frac, 51, 1) == 0) { + f64_frac = f64_frac << 1; + f64_exp = f64_exp - 1; + } + f64_frac = extract64(f64_frac, 0, 51) << 1; + } + + if (extract64(f64_exp, 0, 1) == 0) { + f64 = make_float64(f64_sbit + | (0x3feULL << 52) + | f64_frac); + } else { + f64 = make_float64(f64_sbit + | (0x3fdULL << 52) + | f64_frac); + } + + result_exp = (3068 - f64_exp) / 2; + + f64 = recip_sqrt_estimate(f64, s); + + result_frac = extract64(float64_val(f64), 0, 52); + + return make_float64(f64_sbit | + ((result_exp & 0x7ff) << 52) | + result_frac); +} + +uint32_t HELPER(recpe_u32)(uint32_t a, void *fpstp) +{ + float_status *s = fpstp; + float64 f64; + + if ((a & 0x80000000) == 0) { + return 0xffffffff; + } + + f64 = make_float64((0x3feULL << 52) + | ((int64_t)(a & 0x7fffffff) << 21)); + + f64 = recip_estimate(f64, s); + + return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); +} + +uint32_t HELPER(rsqrte_u32)(uint32_t a, void *fpstp) +{ + float_status *fpst = fpstp; + float64 f64; + + if ((a & 0xc0000000) == 0) { + return 0xffffffff; + } + + if (a & 0x80000000) { + f64 = make_float64((0x3feULL << 52) + | ((uint64_t)(a & 0x7fffffff) << 21)); + } else { /* bits 31-30 == '01' */ + f64 = make_float64((0x3fdULL << 52) + | ((uint64_t)(a & 0x3fffffff) << 22)); + } + + f64 = recip_sqrt_estimate(f64, fpst); + + return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff); +} + +/* VFPv4 fused multiply-accumulate */ +float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp) +{ + float_status *fpst = fpstp; + return float32_muladd(a, b, c, 0, fpst); +} + +float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp) +{ + float_status *fpst = fpstp; + return float64_muladd(a, b, c, 0, fpst); +} + +/* ARMv8 round to integral */ +float32 HELPER(rints_exact)(float32 x, void *fp_status) +{ + return float32_round_to_int(x, fp_status); +} + +float64 HELPER(rintd_exact)(float64 x, void *fp_status) +{ + return float64_round_to_int(x, fp_status); +} + +float32 HELPER(rints)(float32 x, void *fp_status) +{ + int old_flags = get_float_exception_flags(fp_status), new_flags; + float32 ret; + + ret = float32_round_to_int(x, fp_status); + + /* Suppress any inexact exceptions the conversion produced */ + if (!(old_flags & float_flag_inexact)) { + new_flags = get_float_exception_flags(fp_status); + set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status); + } + + return ret; +} + +float64 HELPER(rintd)(float64 x, void *fp_status) +{ + int old_flags = get_float_exception_flags(fp_status), new_flags; + float64 ret; + + ret = float64_round_to_int(x, fp_status); + + new_flags = get_float_exception_flags(fp_status); + + /* Suppress any inexact exceptions the conversion produced */ + if (!(old_flags & float_flag_inexact)) { + new_flags = get_float_exception_flags(fp_status); + set_float_exception_flags(new_flags & ~float_flag_inexact, fp_status); + } + + return ret; +} + +/* Convert ARM rounding mode to softfloat */ +int arm_rmode_to_sf(int rmode) +{ + switch (rmode) { + case FPROUNDING_TIEAWAY: + rmode = float_round_ties_away; + break; + case FPROUNDING_ODD: + /* FIXME: add support for TIEAWAY and ODD */ + qemu_log_mask(LOG_UNIMP, "arm: unimplemented rounding mode: %d\n", + rmode); + case FPROUNDING_TIEEVEN: + default: + rmode = float_round_nearest_even; + break; + case FPROUNDING_POSINF: + rmode = float_round_up; + break; + case FPROUNDING_NEGINF: + rmode = float_round_down; + break; + case FPROUNDING_ZERO: + rmode = float_round_to_zero; + break; + } + return rmode; +} + +/* CRC helpers. + * The upper bytes of val (above the number specified by 'bytes') must have + * been zeroed out by the caller. + */ +uint32_t HELPER(crc32)(uint32_t acc, uint32_t val, uint32_t bytes) +{ + uint8_t buf[4]; + + stl_le_p(buf, val); + + /* zlib crc32 converts the accumulator and output to one's complement. */ + return crc32(acc ^ 0xffffffff, buf, bytes) ^ 0xffffffff; +} + +uint32_t HELPER(crc32c)(uint32_t acc, uint32_t val, uint32_t bytes) +{ + uint8_t buf[4]; + + stl_le_p(buf, val); + + /* Linux crc32c converts the output to one's complement. */ + return crc32c(acc, buf, bytes) ^ 0xffffffff; +} |