| /* |
| * 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.h" |
| #include "ppc.h" |
| #include "qemu/timer.h" |
| #include "sysemu/sysemu.h" |
| #include "nvram.h" |
| #include "qemu/log.h" |
| #include "loader.h" |
| #include "sysemu/kvm.h" |
| #include "kvm_ppc.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) |
| { |
| CPUPPCState *env = &cpu->env; |
| unsigned int old_pending = env->pending_interrupts; |
| |
| if (level) { |
| env->pending_interrupts |= 1 << n_IRQ; |
| cpu_interrupt(env, CPU_INTERRUPT_HARD); |
| } else { |
| env->pending_interrupts &= ~(1 << n_IRQ); |
| if (env->pending_interrupts == 0) |
| cpu_reset_interrupt(env, 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, env->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)) { |
| 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__); |
| env->halted = 1; |
| } |
| break; |
| case PPC6xx_INPUT_HRESET: |
| /* Level sensitive - active low */ |
| if (level) { |
| LOG_IRQ("%s: reset the CPU\n", __func__); |
| cpu_interrupt(env, 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)) { |
| 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__); |
| env->halted = 1; |
| } else { |
| LOG_IRQ("%s: restart the CPU\n", __func__); |
| env->halted = 0; |
| qemu_cpu_kick(CPU(cpu)); |
| } |
| break; |
| case PPC970_INPUT_HRESET: |
| /* Level sensitive - active low */ |
| if (level) { |
| cpu_interrupt(env, 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)) { |
| 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__); |
| env->halted = 1; |
| } else { |
| LOG_IRQ("%s: restart the CPU\n", __func__); |
| env->halted = 0; |
| qemu_cpu_kick(CPU(cpu)); |
| } |
| 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) |
| { |
| CPUPPCState *env; |
| |
| for (env = first_cpu; env != NULL; env = env->next_cpu) { |
| PowerPCCPU *cpu = ppc_env_get_cpu(env); |
| CPUState *cs = CPU(cpu); |
| |
| env->mpic_proxy = enabled; |
| if (kvm_enabled()) { |
| kvmppc_set_mpic_proxy(POWERPC_CPU(cs), 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_get_clock_ns(vm_clock), 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_get_clock_ns(vm_clock), 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_get_clock_ns(vm_clock), tb_env->tb_offset); |
| tb &= 0xFFFFFFFF00000000ULL; |
| cpu_ppc_store_tb(tb_env, qemu_get_clock_ns(vm_clock), |
| &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_get_clock_ns(vm_clock), tb_env->tb_offset); |
| tb &= 0x00000000FFFFFFFFULL; |
| cpu_ppc_store_tb(tb_env, qemu_get_clock_ns(vm_clock), |
| &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_get_clock_ns(vm_clock), 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_get_clock_ns(vm_clock), 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_get_clock_ns(vm_clock), tb_env->atb_offset); |
| tb &= 0xFFFFFFFF00000000ULL; |
| cpu_ppc_store_tb(tb_env, qemu_get_clock_ns(vm_clock), |
| &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_get_clock_ns(vm_clock), tb_env->atb_offset); |
| tb &= 0x00000000FFFFFFFFULL; |
| cpu_ppc_store_tb(tb_env, qemu_get_clock_ns(vm_clock), |
| &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_get_clock_ns(vm_clock); |
| /* 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_get_clock_ns(vm_clock); |
| /* 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); |
| } |
| } |
| |
| 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_get_clock_ns(vm_clock); |
| 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_get_clock_ns(vm_clock) - 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_hdecr_excp(PowerPCCPU *cpu) |
| { |
| /* Raise it */ |
| LOG_TB("raise decrementer exception\n"); |
| ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1); |
| } |
| |
| static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uint64_t *nextp, |
| struct QEMUTimer *timer, |
| void (*raise_excp)(PowerPCCPU *), |
| uint32_t decr, uint32_t value, |
| int is_excp) |
| { |
| 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; |
| } |
| |
| now = qemu_get_clock_ns(vm_clock); |
| next = now + muldiv64(value, get_ticks_per_sec(), tb_env->decr_freq); |
| if (is_excp) { |
| next += *nextp - now; |
| } |
| if (next == now) { |
| next++; |
| } |
| *nextp = next; |
| /* Adjust timer */ |
| qemu_mod_timer(timer, next); |
| |
| /* If we set a negative value and the decrementer was positive, raise an |
| * exception. |
| */ |
| if ((tb_env->flags & PPC_DECR_UNDERFLOW_TRIGGERED) |
| && (value & 0x80000000) |
| && !(decr & 0x80000000)) { |
| (*raise_excp)(cpu); |
| } |
| } |
| |
| static inline void _cpu_ppc_store_decr(PowerPCCPU *cpu, uint32_t decr, |
| uint32_t value, int is_excp) |
| { |
| ppc_tb_t *tb_env = cpu->env.tb_env; |
| |
| __cpu_ppc_store_decr(cpu, &tb_env->decr_next, tb_env->decr_timer, |
| &cpu_ppc_decr_excp, decr, value, is_excp); |
| } |
| |
| 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, 0); |
| } |
| |
| static void cpu_ppc_decr_cb(void *opaque) |
| { |
| PowerPCCPU *cpu = opaque; |
| |
| _cpu_ppc_store_decr(cpu, 0x00000000, 0xFFFFFFFF, 1); |
| } |
| |
| static inline void _cpu_ppc_store_hdecr(PowerPCCPU *cpu, uint32_t hdecr, |
| uint32_t value, int is_excp) |
| { |
| 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, |
| &cpu_ppc_hdecr_excp, hdecr, value, is_excp); |
| } |
| } |
| |
| 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, 0); |
| } |
| |
| static void cpu_ppc_hdecr_cb(void *opaque) |
| { |
| PowerPCCPU *cpu = opaque; |
| |
| _cpu_ppc_store_hdecr(cpu, 0x00000000, 0xFFFFFFFF, 1); |
| } |
| |
| 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_get_clock_ns(vm_clock); |
| } |
| |
| 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, 0); |
| _cpu_ppc_store_hdecr(cpu, 0xFFFFFFFF, 0xFFFFFFFF, 0); |
| cpu_ppc_store_purr(cpu, 0x0000000000000000ULL); |
| } |
| |
| /* 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; |
| /* Create new timer */ |
| tb_env->decr_timer = qemu_new_timer_ns(vm_clock, &cpu_ppc_decr_cb, cpu); |
| if (0) { |
| /* XXX: find a suitable condition to enable the hypervisor decrementer |
| */ |
| tb_env->hdecr_timer = qemu_new_timer_ns(vm_clock, &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 */ |
| struct QEMUTimer *fit_timer; |
| uint64_t wdt_next; /* Tick for next WDT interrupt */ |
| struct 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_get_clock_ns(vm_clock); |
| 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++; |
| qemu_mod_timer(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__); |
| qemu_del_timer(tb_env->decr_timer); |
| } else { |
| LOG_TB("%s: start PIT %016" PRIx64 "\n", |
| __func__, ppc40x_timer->pit_reload); |
| now = qemu_get_clock_ns(vm_clock); |
| 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++; |
| qemu_mod_timer(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_get_clock_ns(vm_clock); |
| 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: |
| qemu_mod_timer(ppc40x_timer->wdt_timer, next); |
| ppc40x_timer->wdt_next = next; |
| env->spr[SPR_40x_TSR] |= 1 << 31; |
| break; |
| case 0x2: |
| qemu_mod_timer(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 = qemu_new_timer_ns(vm_clock, &cpu_4xx_pit_cb, env); |
| ppc40x_timer->fit_timer = |
| qemu_new_timer_ns(vm_clock, &cpu_4xx_fit_cb, env); |
| ppc40x_timer->wdt_timer = |
| qemu_new_timer_ns(vm_clock, &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; |
| } |
| } |
| |
| /*****************************************************************************/ |
| /* NVRAM helpers */ |
| static inline uint32_t nvram_read (nvram_t *nvram, uint32_t addr) |
| { |
| return (*nvram->read_fn)(nvram->opaque, addr); |
| } |
| |
| static inline void nvram_write (nvram_t *nvram, uint32_t addr, uint32_t val) |
| { |
| (*nvram->write_fn)(nvram->opaque, addr, val); |
| } |
| |
| static void NVRAM_set_byte(nvram_t *nvram, uint32_t addr, uint8_t value) |
| { |
| nvram_write(nvram, addr, value); |
| } |
| |
| static uint8_t NVRAM_get_byte(nvram_t *nvram, uint32_t addr) |
| { |
| return nvram_read(nvram, addr); |
| } |
| |
| static void NVRAM_set_word(nvram_t *nvram, uint32_t addr, uint16_t value) |
| { |
| nvram_write(nvram, addr, value >> 8); |
| nvram_write(nvram, addr + 1, value & 0xFF); |
| } |
| |
| static uint16_t NVRAM_get_word(nvram_t *nvram, uint32_t addr) |
| { |
| uint16_t tmp; |
| |
| tmp = nvram_read(nvram, addr) << 8; |
| tmp |= nvram_read(nvram, addr + 1); |
| |
| return tmp; |
| } |
| |
| static void NVRAM_set_lword(nvram_t *nvram, uint32_t addr, uint32_t value) |
| { |
| nvram_write(nvram, addr, value >> 24); |
| nvram_write(nvram, addr + 1, (value >> 16) & 0xFF); |
| nvram_write(nvram, addr + 2, (value >> 8) & 0xFF); |
| nvram_write(nvram, addr + 3, value & 0xFF); |
| } |
| |
| uint32_t NVRAM_get_lword (nvram_t *nvram, uint32_t addr) |
| { |
| uint32_t tmp; |
| |
| tmp = nvram_read(nvram, addr) << 24; |
| tmp |= nvram_read(nvram, addr + 1) << 16; |
| tmp |= nvram_read(nvram, addr + 2) << 8; |
| tmp |= nvram_read(nvram, addr + 3); |
| |
| return tmp; |
| } |
| |
| static void NVRAM_set_string(nvram_t *nvram, uint32_t addr, const char *str, |
| uint32_t max) |
| { |
| int i; |
| |
| for (i = 0; i < max && str[i] != '\0'; i++) { |
| nvram_write(nvram, addr + i, str[i]); |
| } |
| nvram_write(nvram, addr + i, str[i]); |
| nvram_write(nvram, addr + max - 1, '\0'); |
| } |
| |
| int NVRAM_get_string (nvram_t *nvram, uint8_t *dst, uint16_t addr, int max) |
| { |
| int i; |
| |
| memset(dst, 0, max); |
| for (i = 0; i < max; i++) { |
| dst[i] = NVRAM_get_byte(nvram, addr + i); |
| if (dst[i] == '\0') |
| break; |
| } |
| |
| return i; |
| } |
| |
| static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value) |
| { |
| uint16_t tmp; |
| uint16_t pd, pd1, pd2; |
| |
| tmp = prev >> 8; |
| pd = prev ^ value; |
| pd1 = pd & 0x000F; |
| pd2 = ((pd >> 4) & 0x000F) ^ pd1; |
| tmp ^= (pd1 << 3) | (pd1 << 8); |
| tmp ^= pd2 | (pd2 << 7) | (pd2 << 12); |
| |
| return tmp; |
| } |
| |
| static uint16_t NVRAM_compute_crc (nvram_t *nvram, uint32_t start, uint32_t count) |
| { |
| uint32_t i; |
| uint16_t crc = 0xFFFF; |
| int odd; |
| |
| odd = count & 1; |
| count &= ~1; |
| for (i = 0; i != count; i++) { |
| crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i)); |
| } |
| if (odd) { |
| crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8); |
| } |
| |
| return crc; |
| } |
| |
| #define CMDLINE_ADDR 0x017ff000 |
| |
| int PPC_NVRAM_set_params (nvram_t *nvram, uint16_t NVRAM_size, |
| const char *arch, |
| uint32_t RAM_size, int boot_device, |
| uint32_t kernel_image, uint32_t kernel_size, |
| const char *cmdline, |
| uint32_t initrd_image, uint32_t initrd_size, |
| uint32_t NVRAM_image, |
| int width, int height, int depth) |
| { |
| uint16_t crc; |
| |
| /* Set parameters for Open Hack'Ware BIOS */ |
| NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16); |
| NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */ |
| NVRAM_set_word(nvram, 0x14, NVRAM_size); |
| NVRAM_set_string(nvram, 0x20, arch, 16); |
| NVRAM_set_lword(nvram, 0x30, RAM_size); |
| NVRAM_set_byte(nvram, 0x34, boot_device); |
| NVRAM_set_lword(nvram, 0x38, kernel_image); |
| NVRAM_set_lword(nvram, 0x3C, kernel_size); |
| if (cmdline) { |
| /* XXX: put the cmdline in NVRAM too ? */ |
| pstrcpy_targphys("cmdline", CMDLINE_ADDR, RAM_size - CMDLINE_ADDR, cmdline); |
| NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR); |
| NVRAM_set_lword(nvram, 0x44, strlen(cmdline)); |
| } else { |
| NVRAM_set_lword(nvram, 0x40, 0); |
| NVRAM_set_lword(nvram, 0x44, 0); |
| } |
| NVRAM_set_lword(nvram, 0x48, initrd_image); |
| NVRAM_set_lword(nvram, 0x4C, initrd_size); |
| NVRAM_set_lword(nvram, 0x50, NVRAM_image); |
| |
| NVRAM_set_word(nvram, 0x54, width); |
| NVRAM_set_word(nvram, 0x56, height); |
| NVRAM_set_word(nvram, 0x58, depth); |
| crc = NVRAM_compute_crc(nvram, 0x00, 0xF8); |
| NVRAM_set_word(nvram, 0xFC, crc); |
| |
| return 0; |
| } |
