diff options
Diffstat (limited to 'qemu/target-tilegx/cpu.c')
| -rw-r--r-- | qemu/target-tilegx/cpu.c | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/qemu/target-tilegx/cpu.c b/qemu/target-tilegx/cpu.c new file mode 100644 index 000000000..d2d091203 --- /dev/null +++ b/qemu/target-tilegx/cpu.c @@ -0,0 +1,187 @@ +/* + * QEMU TILE-Gx CPU + * + * Copyright (c) 2015 Chen Gang + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see + * <http://www.gnu.org/licenses/lgpl-2.1.html> + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "cpu.h" +#include "qemu-common.h" +#include "hw/qdev-properties.h" +#include "migration/vmstate.h" +#include "linux-user/syscall_defs.h" + +static void tilegx_cpu_dump_state(CPUState *cs, FILE *f, + fprintf_function cpu_fprintf, int flags) +{ + static const char * const reg_names[TILEGX_R_COUNT] = { + "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", + "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", + "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", + "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", + "r32", "r33", "r34", "r35", "r36", "r37", "r38", "r39", + "r40", "r41", "r42", "r43", "r44", "r45", "r46", "r47", + "r48", "r49", "r50", "r51", "bp", "tp", "sp", "lr" + }; + + TileGXCPU *cpu = TILEGX_CPU(cs); + CPUTLGState *env = &cpu->env; + int i; + + for (i = 0; i < TILEGX_R_COUNT; i++) { + cpu_fprintf(f, "%-4s" TARGET_FMT_lx "%s", + reg_names[i], env->regs[i], + (i % 4) == 3 ? "\n" : " "); + } + cpu_fprintf(f, "PC " TARGET_FMT_lx " CEX " TARGET_FMT_lx "\n\n", + env->pc, env->spregs[TILEGX_SPR_CMPEXCH]); +} + +TileGXCPU *cpu_tilegx_init(const char *cpu_model) +{ + TileGXCPU *cpu; + + cpu = TILEGX_CPU(object_new(TYPE_TILEGX_CPU)); + + object_property_set_bool(OBJECT(cpu), true, "realized", NULL); + + return cpu; +} + +static void tilegx_cpu_set_pc(CPUState *cs, vaddr value) +{ + TileGXCPU *cpu = TILEGX_CPU(cs); + + cpu->env.pc = value; +} + +static bool tilegx_cpu_has_work(CPUState *cs) +{ + return true; +} + +static void tilegx_cpu_reset(CPUState *s) +{ + TileGXCPU *cpu = TILEGX_CPU(s); + TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(cpu); + CPUTLGState *env = &cpu->env; + + tcc->parent_reset(s); + + memset(env, 0, sizeof(CPUTLGState)); + tlb_flush(s, 1); +} + +static void tilegx_cpu_realizefn(DeviceState *dev, Error **errp) +{ + CPUState *cs = CPU(dev); + TileGXCPUClass *tcc = TILEGX_CPU_GET_CLASS(dev); + + cpu_reset(cs); + qemu_init_vcpu(cs); + + tcc->parent_realize(dev, errp); +} + +static void tilegx_cpu_initfn(Object *obj) +{ + CPUState *cs = CPU(obj); + TileGXCPU *cpu = TILEGX_CPU(obj); + CPUTLGState *env = &cpu->env; + static bool tcg_initialized; + + cs->env_ptr = env; + cpu_exec_init(cs, &error_abort); + + if (tcg_enabled() && !tcg_initialized) { + tcg_initialized = true; + tilegx_tcg_init(); + } +} + +static void tilegx_cpu_do_interrupt(CPUState *cs) +{ + cs->exception_index = -1; +} + +static int tilegx_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, + int mmu_idx) +{ + TileGXCPU *cpu = TILEGX_CPU(cs); + + /* The sigcode field will be filled in by do_signal in main.c. */ + cs->exception_index = TILEGX_EXCP_SIGNAL; + cpu->env.excaddr = address; + cpu->env.signo = TARGET_SIGSEGV; + cpu->env.sigcode = 0; + + return 1; +} + +static bool tilegx_cpu_exec_interrupt(CPUState *cs, int interrupt_request) +{ + if (interrupt_request & CPU_INTERRUPT_HARD) { + tilegx_cpu_do_interrupt(cs); + return true; + } + return false; +} + +static void tilegx_cpu_class_init(ObjectClass *oc, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(oc); + CPUClass *cc = CPU_CLASS(oc); + TileGXCPUClass *tcc = TILEGX_CPU_CLASS(oc); + + tcc->parent_realize = dc->realize; + dc->realize = tilegx_cpu_realizefn; + + tcc->parent_reset = cc->reset; + cc->reset = tilegx_cpu_reset; + + cc->has_work = tilegx_cpu_has_work; + cc->do_interrupt = tilegx_cpu_do_interrupt; + cc->cpu_exec_interrupt = tilegx_cpu_exec_interrupt; + cc->dump_state = tilegx_cpu_dump_state; + cc->set_pc = tilegx_cpu_set_pc; + cc->handle_mmu_fault = tilegx_cpu_handle_mmu_fault; + cc->gdb_num_core_regs = 0; + + /* + * Reason: tilegx_cpu_initfn() calls cpu_exec_init(), which saves + * the object in cpus -> dangling pointer after final + * object_unref(). + */ + dc->cannot_destroy_with_object_finalize_yet = true; +} + +static const TypeInfo tilegx_cpu_type_info = { + .name = TYPE_TILEGX_CPU, + .parent = TYPE_CPU, + .instance_size = sizeof(TileGXCPU), + .instance_init = tilegx_cpu_initfn, + .class_size = sizeof(TileGXCPUClass), + .class_init = tilegx_cpu_class_init, +}; + +static void tilegx_cpu_register_types(void) +{ + type_register_static(&tilegx_cpu_type_info); +} + +type_init(tilegx_cpu_register_types) |