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Diffstat (limited to 'qemu/hw/ppc/ppc.c')
| -rw-r--r-- | qemu/hw/ppc/ppc.c | 1339 |
1 files changed, 1339 insertions, 0 deletions
diff --git a/qemu/hw/ppc/ppc.c b/qemu/hw/ppc/ppc.c new file mode 100644 index 000000000..b77e30357 --- /dev/null +++ b/qemu/hw/ppc/ppc.c @@ -0,0 +1,1339 @@ +/* + * QEMU generic PowerPC hardware System Emulator + * + * Copyright (c) 2003-2007 Jocelyn Mayer + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "hw/hw.h" +#include "hw/ppc/ppc.h" +#include "hw/ppc/ppc_e500.h" +#include "qemu/timer.h" +#include "sysemu/sysemu.h" +#include "sysemu/cpus.h" +#include "hw/timer/m48t59.h" +#include "qemu/log.h" +#include "qemu/error-report.h" +#include "hw/loader.h" +#include "sysemu/kvm.h" +#include "kvm_ppc.h" +#include "trace.h" + +//#define PPC_DEBUG_IRQ +//#define PPC_DEBUG_TB + +#ifdef PPC_DEBUG_IRQ +# define LOG_IRQ(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__) +#else +# define LOG_IRQ(...) do { } while (0) +#endif + + +#ifdef PPC_DEBUG_TB +# define LOG_TB(...) qemu_log(__VA_ARGS__) +#else +# define LOG_TB(...) do { } while (0) +#endif + +static void cpu_ppc_tb_stop (CPUPPCState *env); +static void cpu_ppc_tb_start (CPUPPCState *env); + +void ppc_set_irq(PowerPCCPU *cpu, int n_IRQ, int level) +{ + CPUState *cs = CPU(cpu); + CPUPPCState *env = &cpu->env; + unsigned int old_pending = env->pending_interrupts; + + if (level) { + env->pending_interrupts |= 1 << n_IRQ; + cpu_interrupt(cs, CPU_INTERRUPT_HARD); + } else { + env->pending_interrupts &= ~(1 << n_IRQ); + if (env->pending_interrupts == 0) { + cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); + } + } + + if (old_pending != env->pending_interrupts) { +#ifdef CONFIG_KVM + kvmppc_set_interrupt(cpu, n_IRQ, level); +#endif + } + + LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32 + "req %08x\n", __func__, env, n_IRQ, level, + env->pending_interrupts, CPU(cpu)->interrupt_request); +} + +/* PowerPC 6xx / 7xx internal IRQ controller */ +static void ppc6xx_set_irq(void *opaque, int pin, int level) +{ + PowerPCCPU *cpu = opaque; + CPUPPCState *env = &cpu->env; + int cur_level; + + LOG_IRQ("%s: env %p pin %d level %d\n", __func__, + env, pin, level); + cur_level = (env->irq_input_state >> pin) & 1; + /* Don't generate spurious events */ + if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { + CPUState *cs = CPU(cpu); + + switch (pin) { + case PPC6xx_INPUT_TBEN: + /* Level sensitive - active high */ + LOG_IRQ("%s: %s the time base\n", + __func__, level ? "start" : "stop"); + if (level) { + cpu_ppc_tb_start(env); + } else { + cpu_ppc_tb_stop(env); + } + case PPC6xx_INPUT_INT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the external IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); + break; + case PPC6xx_INPUT_SMI: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the SMI IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_SMI, level); + break; + case PPC6xx_INPUT_MCP: + /* Negative edge sensitive */ + /* XXX: TODO: actual reaction may depends on HID0 status + * 603/604/740/750: check HID0[EMCP] + */ + if (cur_level == 1 && level == 0) { + LOG_IRQ("%s: raise machine check state\n", + __func__); + ppc_set_irq(cpu, PPC_INTERRUPT_MCK, 1); + } + break; + case PPC6xx_INPUT_CKSTP_IN: + /* Level sensitive - active low */ + /* XXX: TODO: relay the signal to CKSTP_OUT pin */ + /* XXX: Note that the only way to restart the CPU is to reset it */ + if (level) { + LOG_IRQ("%s: stop the CPU\n", __func__); + cs->halted = 1; + } + break; + case PPC6xx_INPUT_HRESET: + /* Level sensitive - active low */ + if (level) { + LOG_IRQ("%s: reset the CPU\n", __func__); + cpu_interrupt(cs, CPU_INTERRUPT_RESET); + } + break; + case PPC6xx_INPUT_SRESET: + LOG_IRQ("%s: set the RESET IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_RESET, level); + break; + default: + /* Unknown pin - do nothing */ + LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); + return; + } + if (level) + env->irq_input_state |= 1 << pin; + else + env->irq_input_state &= ~(1 << pin); + } +} + +void ppc6xx_irq_init(CPUPPCState *env) +{ + PowerPCCPU *cpu = ppc_env_get_cpu(env); + + env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, cpu, + PPC6xx_INPUT_NB); +} + +#if defined(TARGET_PPC64) +/* PowerPC 970 internal IRQ controller */ +static void ppc970_set_irq(void *opaque, int pin, int level) +{ + PowerPCCPU *cpu = opaque; + CPUPPCState *env = &cpu->env; + int cur_level; + + LOG_IRQ("%s: env %p pin %d level %d\n", __func__, + env, pin, level); + cur_level = (env->irq_input_state >> pin) & 1; + /* Don't generate spurious events */ + if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { + CPUState *cs = CPU(cpu); + + switch (pin) { + case PPC970_INPUT_INT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the external IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); + break; + case PPC970_INPUT_THINT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__, + level); + ppc_set_irq(cpu, PPC_INTERRUPT_THERM, level); + break; + case PPC970_INPUT_MCP: + /* Negative edge sensitive */ + /* XXX: TODO: actual reaction may depends on HID0 status + * 603/604/740/750: check HID0[EMCP] + */ + if (cur_level == 1 && level == 0) { + LOG_IRQ("%s: raise machine check state\n", + __func__); + ppc_set_irq(cpu, PPC_INTERRUPT_MCK, 1); + } + break; + case PPC970_INPUT_CKSTP: + /* Level sensitive - active low */ + /* XXX: TODO: relay the signal to CKSTP_OUT pin */ + if (level) { + LOG_IRQ("%s: stop the CPU\n", __func__); + cs->halted = 1; + } else { + LOG_IRQ("%s: restart the CPU\n", __func__); + cs->halted = 0; + qemu_cpu_kick(cs); + } + break; + case PPC970_INPUT_HRESET: + /* Level sensitive - active low */ + if (level) { + cpu_interrupt(cs, CPU_INTERRUPT_RESET); + } + break; + case PPC970_INPUT_SRESET: + LOG_IRQ("%s: set the RESET IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_RESET, level); + break; + case PPC970_INPUT_TBEN: + LOG_IRQ("%s: set the TBEN state to %d\n", __func__, + level); + /* XXX: TODO */ + break; + default: + /* Unknown pin - do nothing */ + LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); + return; + } + if (level) + env->irq_input_state |= 1 << pin; + else + env->irq_input_state &= ~(1 << pin); + } +} + +void ppc970_irq_init(CPUPPCState *env) +{ + PowerPCCPU *cpu = ppc_env_get_cpu(env); + + env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, cpu, + PPC970_INPUT_NB); +} + +/* POWER7 internal IRQ controller */ +static void power7_set_irq(void *opaque, int pin, int level) +{ + PowerPCCPU *cpu = opaque; + CPUPPCState *env = &cpu->env; + + LOG_IRQ("%s: env %p pin %d level %d\n", __func__, + env, pin, level); + + switch (pin) { + case POWER7_INPUT_INT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the external IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); + break; + default: + /* Unknown pin - do nothing */ + LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); + return; + } + if (level) { + env->irq_input_state |= 1 << pin; + } else { + env->irq_input_state &= ~(1 << pin); + } +} + +void ppcPOWER7_irq_init(CPUPPCState *env) +{ + PowerPCCPU *cpu = ppc_env_get_cpu(env); + + env->irq_inputs = (void **)qemu_allocate_irqs(&power7_set_irq, cpu, + POWER7_INPUT_NB); +} +#endif /* defined(TARGET_PPC64) */ + +/* PowerPC 40x internal IRQ controller */ +static void ppc40x_set_irq(void *opaque, int pin, int level) +{ + PowerPCCPU *cpu = opaque; + CPUPPCState *env = &cpu->env; + int cur_level; + + LOG_IRQ("%s: env %p pin %d level %d\n", __func__, + env, pin, level); + cur_level = (env->irq_input_state >> pin) & 1; + /* Don't generate spurious events */ + if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { + CPUState *cs = CPU(cpu); + + switch (pin) { + case PPC40x_INPUT_RESET_SYS: + if (level) { + LOG_IRQ("%s: reset the PowerPC system\n", + __func__); + ppc40x_system_reset(cpu); + } + break; + case PPC40x_INPUT_RESET_CHIP: + if (level) { + LOG_IRQ("%s: reset the PowerPC chip\n", __func__); + ppc40x_chip_reset(cpu); + } + break; + case PPC40x_INPUT_RESET_CORE: + /* XXX: TODO: update DBSR[MRR] */ + if (level) { + LOG_IRQ("%s: reset the PowerPC core\n", __func__); + ppc40x_core_reset(cpu); + } + break; + case PPC40x_INPUT_CINT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the critical IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_CEXT, level); + break; + case PPC40x_INPUT_INT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the external IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); + break; + case PPC40x_INPUT_HALT: + /* Level sensitive - active low */ + if (level) { + LOG_IRQ("%s: stop the CPU\n", __func__); + cs->halted = 1; + } else { + LOG_IRQ("%s: restart the CPU\n", __func__); + cs->halted = 0; + qemu_cpu_kick(cs); + } + break; + case PPC40x_INPUT_DEBUG: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the debug pin state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_DEBUG, level); + break; + default: + /* Unknown pin - do nothing */ + LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); + return; + } + if (level) + env->irq_input_state |= 1 << pin; + else + env->irq_input_state &= ~(1 << pin); + } +} + +void ppc40x_irq_init(CPUPPCState *env) +{ + PowerPCCPU *cpu = ppc_env_get_cpu(env); + + env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq, + cpu, PPC40x_INPUT_NB); +} + +/* PowerPC E500 internal IRQ controller */ +static void ppce500_set_irq(void *opaque, int pin, int level) +{ + PowerPCCPU *cpu = opaque; + CPUPPCState *env = &cpu->env; + int cur_level; + + LOG_IRQ("%s: env %p pin %d level %d\n", __func__, + env, pin, level); + cur_level = (env->irq_input_state >> pin) & 1; + /* Don't generate spurious events */ + if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) { + switch (pin) { + case PPCE500_INPUT_MCK: + if (level) { + LOG_IRQ("%s: reset the PowerPC system\n", + __func__); + qemu_system_reset_request(); + } + break; + case PPCE500_INPUT_RESET_CORE: + if (level) { + LOG_IRQ("%s: reset the PowerPC core\n", __func__); + ppc_set_irq(cpu, PPC_INTERRUPT_MCK, level); + } + break; + case PPCE500_INPUT_CINT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the critical IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_CEXT, level); + break; + case PPCE500_INPUT_INT: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the core IRQ state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level); + break; + case PPCE500_INPUT_DEBUG: + /* Level sensitive - active high */ + LOG_IRQ("%s: set the debug pin state to %d\n", + __func__, level); + ppc_set_irq(cpu, PPC_INTERRUPT_DEBUG, level); + break; + default: + /* Unknown pin - do nothing */ + LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin); + return; + } + if (level) + env->irq_input_state |= 1 << pin; + else + env->irq_input_state &= ~(1 << pin); + } +} + +void ppce500_irq_init(CPUPPCState *env) +{ + PowerPCCPU *cpu = ppc_env_get_cpu(env); + + env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq, + cpu, PPCE500_INPUT_NB); +} + +/* Enable or Disable the E500 EPR capability */ +void ppce500_set_mpic_proxy(bool enabled) +{ + CPUState *cs; + + CPU_FOREACH(cs) { + PowerPCCPU *cpu = POWERPC_CPU(cs); + + cpu->env.mpic_proxy = enabled; + if (kvm_enabled()) { + kvmppc_set_mpic_proxy(cpu, enabled); + } + } +} + +/*****************************************************************************/ +/* PowerPC time base and decrementer emulation */ + +uint64_t cpu_ppc_get_tb(ppc_tb_t *tb_env, uint64_t vmclk, int64_t tb_offset) +{ + /* TB time in tb periods */ + return muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()) + tb_offset; +} + +uint64_t cpu_ppc_load_tbl (CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb; + + if (kvm_enabled()) { + return env->spr[SPR_TBL]; + } + + tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset); + LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); + + return tb; +} + +static inline uint32_t _cpu_ppc_load_tbu(CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb; + + tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset); + LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); + + return tb >> 32; +} + +uint32_t cpu_ppc_load_tbu (CPUPPCState *env) +{ + if (kvm_enabled()) { + return env->spr[SPR_TBU]; + } + + return _cpu_ppc_load_tbu(env); +} + +static inline void cpu_ppc_store_tb(ppc_tb_t *tb_env, uint64_t vmclk, + int64_t *tb_offsetp, uint64_t value) +{ + *tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()); + LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n", + __func__, value, *tb_offsetp); +} + +void cpu_ppc_store_tbl (CPUPPCState *env, uint32_t value) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb; + + tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset); + tb &= 0xFFFFFFFF00000000ULL; + cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), + &tb_env->tb_offset, tb | (uint64_t)value); +} + +static inline void _cpu_ppc_store_tbu(CPUPPCState *env, uint32_t value) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb; + + tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset); + tb &= 0x00000000FFFFFFFFULL; + cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), + &tb_env->tb_offset, ((uint64_t)value << 32) | tb); +} + +void cpu_ppc_store_tbu (CPUPPCState *env, uint32_t value) +{ + _cpu_ppc_store_tbu(env, value); +} + +uint64_t cpu_ppc_load_atbl (CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb; + + tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset); + LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); + + return tb; +} + +uint32_t cpu_ppc_load_atbu (CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb; + + tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset); + LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb); + + return tb >> 32; +} + +void cpu_ppc_store_atbl (CPUPPCState *env, uint32_t value) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb; + + tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset); + tb &= 0xFFFFFFFF00000000ULL; + cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), + &tb_env->atb_offset, tb | (uint64_t)value); +} + +void cpu_ppc_store_atbu (CPUPPCState *env, uint32_t value) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb; + + tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset); + tb &= 0x00000000FFFFFFFFULL; + cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), + &tb_env->atb_offset, ((uint64_t)value << 32) | tb); +} + +static void cpu_ppc_tb_stop (CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb, atb, vmclk; + + /* If the time base is already frozen, do nothing */ + if (tb_env->tb_freq != 0) { + vmclk = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + /* Get the time base */ + tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset); + /* Get the alternate time base */ + atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset); + /* Store the time base value (ie compute the current offset) */ + cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb); + /* Store the alternate time base value (compute the current offset) */ + cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb); + /* Set the time base frequency to zero */ + tb_env->tb_freq = 0; + /* Now, the time bases are frozen to tb_offset / atb_offset value */ + } +} + +static void cpu_ppc_tb_start (CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t tb, atb, vmclk; + + /* If the time base is not frozen, do nothing */ + if (tb_env->tb_freq == 0) { + vmclk = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + /* Get the time base from tb_offset */ + tb = tb_env->tb_offset; + /* Get the alternate time base from atb_offset */ + atb = tb_env->atb_offset; + /* Restore the tb frequency from the decrementer frequency */ + tb_env->tb_freq = tb_env->decr_freq; + /* Store the time base value */ + cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb); + /* Store the alternate time base value */ + cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb); + } +} + +bool ppc_decr_clear_on_delivery(CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + int flags = PPC_DECR_UNDERFLOW_TRIGGERED | PPC_DECR_UNDERFLOW_LEVEL; + return ((tb_env->flags & flags) == PPC_DECR_UNDERFLOW_TRIGGERED); +} + +static inline uint32_t _cpu_ppc_load_decr(CPUPPCState *env, uint64_t next) +{ + ppc_tb_t *tb_env = env->tb_env; + uint32_t decr; + int64_t diff; + + diff = next - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + if (diff >= 0) { + decr = muldiv64(diff, tb_env->decr_freq, get_ticks_per_sec()); + } else if (tb_env->flags & PPC_TIMER_BOOKE) { + decr = 0; + } else { + decr = -muldiv64(-diff, tb_env->decr_freq, get_ticks_per_sec()); + } + LOG_TB("%s: %08" PRIx32 "\n", __func__, decr); + + return decr; +} + +uint32_t cpu_ppc_load_decr (CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + + if (kvm_enabled()) { + return env->spr[SPR_DECR]; + } + + return _cpu_ppc_load_decr(env, tb_env->decr_next); +} + +uint32_t cpu_ppc_load_hdecr (CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + + return _cpu_ppc_load_decr(env, tb_env->hdecr_next); +} + +uint64_t cpu_ppc_load_purr (CPUPPCState *env) +{ + ppc_tb_t *tb_env = env->tb_env; + uint64_t diff; + + diff = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - tb_env->purr_start; + + return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, get_ticks_per_sec()); +} + +/* When decrementer expires, + * all we need to do is generate or queue a CPU exception + */ +static inline void cpu_ppc_decr_excp(PowerPCCPU *cpu) +{ + /* Raise it */ + LOG_TB("raise decrementer exception\n"); + ppc_set_irq(cpu, PPC_INTERRUPT_DECR, 1); +} + +static inline void cpu_ppc_decr_lower(PowerPCCPU *cpu) +{ + ppc_set_irq(cpu, PPC_INTERRUPT_DECR, 0); +} + +static inline void cpu_ppc_hdecr_excp(PowerPCCPU *cpu) +{ + /* Raise it */ + LOG_TB("raise decrementer exception\n"); + ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1); +} + +static inline void cpu_ppc_hdecr_lower(PowerPCCPU *cpu) +{ + ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 0); +} + +static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uint64_t *nextp, + QEMUTimer *timer, + void (*raise_excp)(void *), + void (*lower_excp)(PowerPCCPU *), + uint32_t decr, uint32_t value) +{ + CPUPPCState *env = &cpu->env; + ppc_tb_t *tb_env = env->tb_env; + uint64_t now, next; + + LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__, + decr, value); + + if (kvm_enabled()) { + /* KVM handles decrementer exceptions, we don't need our own timer */ + return; + } + + /* + * Going from 2 -> 1, 1 -> 0 or 0 -> -1 is the event to generate a DEC + * interrupt. + * + * If we get a really small DEC value, we can assume that by the time we + * handled it we should inject an interrupt already. + * + * On MSB level based DEC implementations the MSB always means the interrupt + * is pending, so raise it on those. + * + * On MSB edge based DEC implementations the MSB going from 0 -> 1 triggers + * an edge interrupt, so raise it here too. + */ + if ((value < 3) || + ((tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL) && (value & 0x80000000)) || + ((tb_env->flags & PPC_DECR_UNDERFLOW_TRIGGERED) && (value & 0x80000000) + && !(decr & 0x80000000))) { + (*raise_excp)(cpu); + return; + } + + /* On MSB level based systems a 0 for the MSB stops interrupt delivery */ + if (!(value & 0x80000000) && (tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL)) { + (*lower_excp)(cpu); + } + + /* Calculate the next timer event */ + now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + next = now + muldiv64(value, get_ticks_per_sec(), tb_env->decr_freq); + *nextp = next; + + /* Adjust timer */ + timer_mod(timer, next); +} + +static inline void _cpu_ppc_store_decr(PowerPCCPU *cpu, uint32_t decr, + uint32_t value) +{ + ppc_tb_t *tb_env = cpu->env.tb_env; + + __cpu_ppc_store_decr(cpu, &tb_env->decr_next, tb_env->decr_timer, + tb_env->decr_timer->cb, &cpu_ppc_decr_lower, decr, + value); +} + +void cpu_ppc_store_decr (CPUPPCState *env, uint32_t value) +{ + PowerPCCPU *cpu = ppc_env_get_cpu(env); + + _cpu_ppc_store_decr(cpu, cpu_ppc_load_decr(env), value); +} + +static void cpu_ppc_decr_cb(void *opaque) +{ + PowerPCCPU *cpu = opaque; + + cpu_ppc_decr_excp(cpu); +} + +static inline void _cpu_ppc_store_hdecr(PowerPCCPU *cpu, uint32_t hdecr, + uint32_t value) +{ + ppc_tb_t *tb_env = cpu->env.tb_env; + + if (tb_env->hdecr_timer != NULL) { + __cpu_ppc_store_decr(cpu, &tb_env->hdecr_next, tb_env->hdecr_timer, + tb_env->hdecr_timer->cb, &cpu_ppc_hdecr_lower, + hdecr, value); + } +} + +void cpu_ppc_store_hdecr (CPUPPCState *env, uint32_t value) +{ + PowerPCCPU *cpu = ppc_env_get_cpu(env); + + _cpu_ppc_store_hdecr(cpu, cpu_ppc_load_hdecr(env), value); +} + +static void cpu_ppc_hdecr_cb(void *opaque) +{ + PowerPCCPU *cpu = opaque; + + cpu_ppc_hdecr_excp(cpu); +} + +static void cpu_ppc_store_purr(PowerPCCPU *cpu, uint64_t value) +{ + ppc_tb_t *tb_env = cpu->env.tb_env; + + tb_env->purr_load = value; + tb_env->purr_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); +} + +static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq) +{ + CPUPPCState *env = opaque; + PowerPCCPU *cpu = ppc_env_get_cpu(env); + ppc_tb_t *tb_env = env->tb_env; + + tb_env->tb_freq = freq; + tb_env->decr_freq = freq; + /* There is a bug in Linux 2.4 kernels: + * if a decrementer exception is pending when it enables msr_ee at startup, + * it's not ready to handle it... + */ + _cpu_ppc_store_decr(cpu, 0xFFFFFFFF, 0xFFFFFFFF); + _cpu_ppc_store_hdecr(cpu, 0xFFFFFFFF, 0xFFFFFFFF); + cpu_ppc_store_purr(cpu, 0x0000000000000000ULL); +} + +static void timebase_pre_save(void *opaque) +{ + PPCTimebase *tb = opaque; + uint64_t ticks = cpu_get_real_ticks(); + PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu); + + if (!first_ppc_cpu->env.tb_env) { + error_report("No timebase object"); + return; + } + + tb->time_of_the_day_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST); + /* + * tb_offset is only expected to be changed by migration so + * there is no need to update it from KVM here + */ + tb->guest_timebase = ticks + first_ppc_cpu->env.tb_env->tb_offset; +} + +static int timebase_post_load(void *opaque, int version_id) +{ + PPCTimebase *tb_remote = opaque; + CPUState *cpu; + PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu); + int64_t tb_off_adj, tb_off, ns_diff; + int64_t migration_duration_ns, migration_duration_tb, guest_tb, host_ns; + unsigned long freq; + + if (!first_ppc_cpu->env.tb_env) { + error_report("No timebase object"); + return -1; + } + + freq = first_ppc_cpu->env.tb_env->tb_freq; + /* + * Calculate timebase on the destination side of migration. + * The destination timebase must be not less than the source timebase. + * We try to adjust timebase by downtime if host clocks are not + * too much out of sync (1 second for now). + */ + host_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST); + ns_diff = MAX(0, host_ns - tb_remote->time_of_the_day_ns); + migration_duration_ns = MIN(NANOSECONDS_PER_SECOND, ns_diff); + migration_duration_tb = muldiv64(migration_duration_ns, freq, + NANOSECONDS_PER_SECOND); + guest_tb = tb_remote->guest_timebase + MIN(0, migration_duration_tb); + + tb_off_adj = guest_tb - cpu_get_real_ticks(); + + tb_off = first_ppc_cpu->env.tb_env->tb_offset; + trace_ppc_tb_adjust(tb_off, tb_off_adj, tb_off_adj - tb_off, + (tb_off_adj - tb_off) / freq); + + /* Set new offset to all CPUs */ + CPU_FOREACH(cpu) { + PowerPCCPU *pcpu = POWERPC_CPU(cpu); + pcpu->env.tb_env->tb_offset = tb_off_adj; + } + + return 0; +} + +const VMStateDescription vmstate_ppc_timebase = { + .name = "timebase", + .version_id = 1, + .minimum_version_id = 1, + .minimum_version_id_old = 1, + .pre_save = timebase_pre_save, + .post_load = timebase_post_load, + .fields = (VMStateField []) { + VMSTATE_UINT64(guest_timebase, PPCTimebase), + VMSTATE_INT64(time_of_the_day_ns, PPCTimebase), + VMSTATE_END_OF_LIST() + }, +}; + +/* Set up (once) timebase frequency (in Hz) */ +clk_setup_cb cpu_ppc_tb_init (CPUPPCState *env, uint32_t freq) +{ + PowerPCCPU *cpu = ppc_env_get_cpu(env); + ppc_tb_t *tb_env; + + tb_env = g_malloc0(sizeof(ppc_tb_t)); + env->tb_env = tb_env; + tb_env->flags = PPC_DECR_UNDERFLOW_TRIGGERED; + if (env->insns_flags & PPC_SEGMENT_64B) { + /* All Book3S 64bit CPUs implement level based DEC logic */ + tb_env->flags |= PPC_DECR_UNDERFLOW_LEVEL; + } + /* Create new timer */ + tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_decr_cb, cpu); + if (0) { + /* XXX: find a suitable condition to enable the hypervisor decrementer + */ + tb_env->hdecr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_hdecr_cb, + cpu); + } else { + tb_env->hdecr_timer = NULL; + } + cpu_ppc_set_tb_clk(env, freq); + + return &cpu_ppc_set_tb_clk; +} + +/* Specific helpers for POWER & PowerPC 601 RTC */ +#if 0 +static clk_setup_cb cpu_ppc601_rtc_init (CPUPPCState *env) +{ + return cpu_ppc_tb_init(env, 7812500); +} +#endif + +void cpu_ppc601_store_rtcu (CPUPPCState *env, uint32_t value) +{ + _cpu_ppc_store_tbu(env, value); +} + +uint32_t cpu_ppc601_load_rtcu (CPUPPCState *env) +{ + return _cpu_ppc_load_tbu(env); +} + +void cpu_ppc601_store_rtcl (CPUPPCState *env, uint32_t value) +{ + cpu_ppc_store_tbl(env, value & 0x3FFFFF80); +} + +uint32_t cpu_ppc601_load_rtcl (CPUPPCState *env) +{ + return cpu_ppc_load_tbl(env) & 0x3FFFFF80; +} + +/*****************************************************************************/ +/* PowerPC 40x timers */ + +/* PIT, FIT & WDT */ +typedef struct ppc40x_timer_t ppc40x_timer_t; +struct ppc40x_timer_t { + uint64_t pit_reload; /* PIT auto-reload value */ + uint64_t fit_next; /* Tick for next FIT interrupt */ + QEMUTimer *fit_timer; + uint64_t wdt_next; /* Tick for next WDT interrupt */ + QEMUTimer *wdt_timer; + + /* 405 have the PIT, 440 have a DECR. */ + unsigned int decr_excp; +}; + +/* Fixed interval timer */ +static void cpu_4xx_fit_cb (void *opaque) +{ + PowerPCCPU *cpu; + CPUPPCState *env; + ppc_tb_t *tb_env; + ppc40x_timer_t *ppc40x_timer; + uint64_t now, next; + + env = opaque; + cpu = ppc_env_get_cpu(env); + tb_env = env->tb_env; + ppc40x_timer = tb_env->opaque; + now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) { + case 0: + next = 1 << 9; + break; + case 1: + next = 1 << 13; + break; + case 2: + next = 1 << 17; + break; + case 3: + next = 1 << 21; + break; + default: + /* Cannot occur, but makes gcc happy */ + return; + } + next = now + muldiv64(next, get_ticks_per_sec(), tb_env->tb_freq); + if (next == now) + next++; + timer_mod(ppc40x_timer->fit_timer, next); + env->spr[SPR_40x_TSR] |= 1 << 26; + if ((env->spr[SPR_40x_TCR] >> 23) & 0x1) { + ppc_set_irq(cpu, PPC_INTERRUPT_FIT, 1); + } + LOG_TB("%s: ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__, + (int)((env->spr[SPR_40x_TCR] >> 23) & 0x1), + env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); +} + +/* Programmable interval timer */ +static void start_stop_pit (CPUPPCState *env, ppc_tb_t *tb_env, int is_excp) +{ + ppc40x_timer_t *ppc40x_timer; + uint64_t now, next; + + ppc40x_timer = tb_env->opaque; + if (ppc40x_timer->pit_reload <= 1 || + !((env->spr[SPR_40x_TCR] >> 26) & 0x1) || + (is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) { + /* Stop PIT */ + LOG_TB("%s: stop PIT\n", __func__); + timer_del(tb_env->decr_timer); + } else { + LOG_TB("%s: start PIT %016" PRIx64 "\n", + __func__, ppc40x_timer->pit_reload); + now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + next = now + muldiv64(ppc40x_timer->pit_reload, + get_ticks_per_sec(), tb_env->decr_freq); + if (is_excp) + next += tb_env->decr_next - now; + if (next == now) + next++; + timer_mod(tb_env->decr_timer, next); + tb_env->decr_next = next; + } +} + +static void cpu_4xx_pit_cb (void *opaque) +{ + PowerPCCPU *cpu; + CPUPPCState *env; + ppc_tb_t *tb_env; + ppc40x_timer_t *ppc40x_timer; + + env = opaque; + cpu = ppc_env_get_cpu(env); + tb_env = env->tb_env; + ppc40x_timer = tb_env->opaque; + env->spr[SPR_40x_TSR] |= 1 << 27; + if ((env->spr[SPR_40x_TCR] >> 26) & 0x1) { + ppc_set_irq(cpu, ppc40x_timer->decr_excp, 1); + } + start_stop_pit(env, tb_env, 1); + LOG_TB("%s: ar %d ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx " " + "%016" PRIx64 "\n", __func__, + (int)((env->spr[SPR_40x_TCR] >> 22) & 0x1), + (int)((env->spr[SPR_40x_TCR] >> 26) & 0x1), + env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR], + ppc40x_timer->pit_reload); +} + +/* Watchdog timer */ +static void cpu_4xx_wdt_cb (void *opaque) +{ + PowerPCCPU *cpu; + CPUPPCState *env; + ppc_tb_t *tb_env; + ppc40x_timer_t *ppc40x_timer; + uint64_t now, next; + + env = opaque; + cpu = ppc_env_get_cpu(env); + tb_env = env->tb_env; + ppc40x_timer = tb_env->opaque; + now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); + switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) { + case 0: + next = 1 << 17; + break; + case 1: + next = 1 << 21; + break; + case 2: + next = 1 << 25; + break; + case 3: + next = 1 << 29; + break; + default: + /* Cannot occur, but makes gcc happy */ + return; + } + next = now + muldiv64(next, get_ticks_per_sec(), tb_env->decr_freq); + if (next == now) + next++; + LOG_TB("%s: TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__, + env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); + switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) { + case 0x0: + case 0x1: + timer_mod(ppc40x_timer->wdt_timer, next); + ppc40x_timer->wdt_next = next; + env->spr[SPR_40x_TSR] |= 1U << 31; + break; + case 0x2: + timer_mod(ppc40x_timer->wdt_timer, next); + ppc40x_timer->wdt_next = next; + env->spr[SPR_40x_TSR] |= 1 << 30; + if ((env->spr[SPR_40x_TCR] >> 27) & 0x1) { + ppc_set_irq(cpu, PPC_INTERRUPT_WDT, 1); + } + break; + case 0x3: + env->spr[SPR_40x_TSR] &= ~0x30000000; + env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000; + switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) { + case 0x0: + /* No reset */ + break; + case 0x1: /* Core reset */ + ppc40x_core_reset(cpu); + break; + case 0x2: /* Chip reset */ + ppc40x_chip_reset(cpu); + break; + case 0x3: /* System reset */ + ppc40x_system_reset(cpu); + break; + } + } +} + +void store_40x_pit (CPUPPCState *env, target_ulong val) +{ + ppc_tb_t *tb_env; + ppc40x_timer_t *ppc40x_timer; + + tb_env = env->tb_env; + ppc40x_timer = tb_env->opaque; + LOG_TB("%s val" TARGET_FMT_lx "\n", __func__, val); + ppc40x_timer->pit_reload = val; + start_stop_pit(env, tb_env, 0); +} + +target_ulong load_40x_pit (CPUPPCState *env) +{ + return cpu_ppc_load_decr(env); +} + +static void ppc_40x_set_tb_clk (void *opaque, uint32_t freq) +{ + CPUPPCState *env = opaque; + ppc_tb_t *tb_env = env->tb_env; + + LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__, + freq); + tb_env->tb_freq = freq; + tb_env->decr_freq = freq; + /* XXX: we should also update all timers */ +} + +clk_setup_cb ppc_40x_timers_init (CPUPPCState *env, uint32_t freq, + unsigned int decr_excp) +{ + ppc_tb_t *tb_env; + ppc40x_timer_t *ppc40x_timer; + + tb_env = g_malloc0(sizeof(ppc_tb_t)); + env->tb_env = tb_env; + tb_env->flags = PPC_DECR_UNDERFLOW_TRIGGERED; + ppc40x_timer = g_malloc0(sizeof(ppc40x_timer_t)); + tb_env->tb_freq = freq; + tb_env->decr_freq = freq; + tb_env->opaque = ppc40x_timer; + LOG_TB("%s freq %" PRIu32 "\n", __func__, freq); + if (ppc40x_timer != NULL) { + /* We use decr timer for PIT */ + tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_pit_cb, env); + ppc40x_timer->fit_timer = + timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_fit_cb, env); + ppc40x_timer->wdt_timer = + timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_wdt_cb, env); + ppc40x_timer->decr_excp = decr_excp; + } + + return &ppc_40x_set_tb_clk; +} + +/*****************************************************************************/ +/* Embedded PowerPC Device Control Registers */ +typedef struct ppc_dcrn_t ppc_dcrn_t; +struct ppc_dcrn_t { + dcr_read_cb dcr_read; + dcr_write_cb dcr_write; + void *opaque; +}; + +/* XXX: on 460, DCR addresses are 32 bits wide, + * using DCRIPR to get the 22 upper bits of the DCR address + */ +#define DCRN_NB 1024 +struct ppc_dcr_t { + ppc_dcrn_t dcrn[DCRN_NB]; + int (*read_error)(int dcrn); + int (*write_error)(int dcrn); +}; + +int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp) +{ + ppc_dcrn_t *dcr; + + if (dcrn < 0 || dcrn >= DCRN_NB) + goto error; + dcr = &dcr_env->dcrn[dcrn]; + if (dcr->dcr_read == NULL) + goto error; + *valp = (*dcr->dcr_read)(dcr->opaque, dcrn); + + return 0; + + error: + if (dcr_env->read_error != NULL) + return (*dcr_env->read_error)(dcrn); + + return -1; +} + +int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val) +{ + ppc_dcrn_t *dcr; + + if (dcrn < 0 || dcrn >= DCRN_NB) + goto error; + dcr = &dcr_env->dcrn[dcrn]; + if (dcr->dcr_write == NULL) + goto error; + (*dcr->dcr_write)(dcr->opaque, dcrn, val); + + return 0; + + error: + if (dcr_env->write_error != NULL) + return (*dcr_env->write_error)(dcrn); + + return -1; +} + +int ppc_dcr_register (CPUPPCState *env, int dcrn, void *opaque, + dcr_read_cb dcr_read, dcr_write_cb dcr_write) +{ + ppc_dcr_t *dcr_env; + ppc_dcrn_t *dcr; + + dcr_env = env->dcr_env; + if (dcr_env == NULL) + return -1; + if (dcrn < 0 || dcrn >= DCRN_NB) + return -1; + dcr = &dcr_env->dcrn[dcrn]; + if (dcr->opaque != NULL || + dcr->dcr_read != NULL || + dcr->dcr_write != NULL) + return -1; + dcr->opaque = opaque; + dcr->dcr_read = dcr_read; + dcr->dcr_write = dcr_write; + + return 0; +} + +int ppc_dcr_init (CPUPPCState *env, int (*read_error)(int dcrn), + int (*write_error)(int dcrn)) +{ + ppc_dcr_t *dcr_env; + + dcr_env = g_malloc0(sizeof(ppc_dcr_t)); + dcr_env->read_error = read_error; + dcr_env->write_error = write_error; + env->dcr_env = dcr_env; + + return 0; +} + +/*****************************************************************************/ +/* Debug port */ +void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val) +{ + addr &= 0xF; + switch (addr) { + case 0: + printf("%c", val); + break; + case 1: + printf("\n"); + fflush(stdout); + break; + case 2: + printf("Set loglevel to %04" PRIx32 "\n", val); + qemu_set_log(val | 0x100); + break; + } +} + +/* CPU device-tree ID helpers */ +int ppc_get_vcpu_dt_id(PowerPCCPU *cpu) +{ + return cpu->cpu_dt_id; +} + +PowerPCCPU *ppc_get_vcpu_by_dt_id(int cpu_dt_id) +{ + CPUState *cs; + + CPU_FOREACH(cs) { + PowerPCCPU *cpu = POWERPC_CPU(cs); + + if (cpu->cpu_dt_id == cpu_dt_id) { + return cpu; + } + } + + return NULL; +} |