| /* |
| * 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.h" |
| #include "nvram.h" |
| #include "qemu-log.h" |
| |
| //#define PPC_DEBUG_IRQ |
| //#define PPC_DEBUG_TB |
| |
| static void cpu_ppc_tb_stop (CPUState *env); |
| static void cpu_ppc_tb_start (CPUState *env); |
| |
| static void ppc_set_irq (CPUState *env, int n_IRQ, int level) |
| { |
| 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 defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: %p n_IRQ %d level %d => pending %08" PRIx32 |
| "req %08x\n", __func__, env, n_IRQ, level, |
| env->pending_interrupts, env->interrupt_request); |
| } |
| #endif |
| } |
| |
| /* PowerPC 6xx / 7xx internal IRQ controller */ |
| static void ppc6xx_set_irq (void *opaque, int pin, int level) |
| { |
| CPUState *env = opaque; |
| int cur_level; |
| |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: env %p pin %d level %d\n", __func__, |
| env, pin, level); |
| } |
| #endif |
| 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 */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: %s the time base\n", |
| __func__, level ? "start" : "stop"); |
| } |
| #endif |
| if (level) { |
| cpu_ppc_tb_start(env); |
| } else { |
| cpu_ppc_tb_stop(env); |
| } |
| case PPC6xx_INPUT_INT: |
| /* Level sensitive - active high */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the external IRQ state to %d\n", |
| __func__, level); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_EXT, level); |
| break; |
| case PPC6xx_INPUT_SMI: |
| /* Level sensitive - active high */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the SMI IRQ state to %d\n", |
| __func__, level); |
| } |
| #endif |
| ppc_set_irq(env, 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) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: raise machine check state\n", |
| __func__); |
| } |
| #endif |
| ppc_set_irq(env, 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) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: stop the CPU\n", __func__); |
| } |
| #endif |
| env->halted = 1; |
| } |
| break; |
| case PPC6xx_INPUT_HRESET: |
| /* Level sensitive - active low */ |
| if (level) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: reset the CPU\n", __func__); |
| } |
| #endif |
| env->interrupt_request |= CPU_INTERRUPT_EXITTB; |
| /* XXX: TOFIX */ |
| #if 0 |
| cpu_ppc_reset(env); |
| #else |
| qemu_system_reset_request(); |
| #endif |
| } |
| break; |
| case PPC6xx_INPUT_SRESET: |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the RESET IRQ state to %d\n", |
| __func__, level); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_RESET, level); |
| break; |
| default: |
| /* Unknown pin - do nothing */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: unknown IRQ pin %d\n", __func__, pin); |
| } |
| #endif |
| return; |
| } |
| if (level) |
| env->irq_input_state |= 1 << pin; |
| else |
| env->irq_input_state &= ~(1 << pin); |
| } |
| } |
| |
| void ppc6xx_irq_init (CPUState *env) |
| { |
| env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, env, |
| PPC6xx_INPUT_NB); |
| } |
| |
| #if defined(TARGET_PPC64) |
| /* PowerPC 970 internal IRQ controller */ |
| static void ppc970_set_irq (void *opaque, int pin, int level) |
| { |
| CPUState *env = opaque; |
| int cur_level; |
| |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: env %p pin %d level %d\n", __func__, |
| env, pin, level); |
| } |
| #endif |
| 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 */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the external IRQ state to %d\n", |
| __func__, level); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_EXT, level); |
| break; |
| case PPC970_INPUT_THINT: |
| /* Level sensitive - active high */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the SMI IRQ state to %d\n", __func__, |
| level); |
| } |
| #endif |
| ppc_set_irq(env, 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) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: raise machine check state\n", |
| __func__); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_MCK, 1); |
| } |
| break; |
| case PPC970_INPUT_CKSTP: |
| /* Level sensitive - active low */ |
| /* XXX: TODO: relay the signal to CKSTP_OUT pin */ |
| if (level) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: stop the CPU\n", __func__); |
| } |
| #endif |
| env->halted = 1; |
| } else { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: restart the CPU\n", __func__); |
| } |
| #endif |
| env->halted = 0; |
| } |
| break; |
| case PPC970_INPUT_HRESET: |
| /* Level sensitive - active low */ |
| if (level) { |
| #if 0 // XXX: TOFIX |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: reset the CPU\n", __func__); |
| } |
| #endif |
| cpu_reset(env); |
| #endif |
| } |
| break; |
| case PPC970_INPUT_SRESET: |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the RESET IRQ state to %d\n", |
| __func__, level); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_RESET, level); |
| break; |
| case PPC970_INPUT_TBEN: |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the TBEN state to %d\n", __func__, |
| level); |
| } |
| #endif |
| /* XXX: TODO */ |
| break; |
| default: |
| /* Unknown pin - do nothing */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: unknown IRQ pin %d\n", __func__, pin); |
| } |
| #endif |
| return; |
| } |
| if (level) |
| env->irq_input_state |= 1 << pin; |
| else |
| env->irq_input_state &= ~(1 << pin); |
| } |
| } |
| |
| void ppc970_irq_init (CPUState *env) |
| { |
| env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, env, |
| PPC970_INPUT_NB); |
| } |
| #endif /* defined(TARGET_PPC64) */ |
| |
| /* PowerPC 40x internal IRQ controller */ |
| static void ppc40x_set_irq (void *opaque, int pin, int level) |
| { |
| CPUState *env = opaque; |
| int cur_level; |
| |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: env %p pin %d level %d\n", __func__, |
| env, pin, level); |
| } |
| #endif |
| 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) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: reset the PowerPC system\n", |
| __func__); |
| } |
| #endif |
| ppc40x_system_reset(env); |
| } |
| break; |
| case PPC40x_INPUT_RESET_CHIP: |
| if (level) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: reset the PowerPC chip\n", __func__); |
| } |
| #endif |
| ppc40x_chip_reset(env); |
| } |
| break; |
| case PPC40x_INPUT_RESET_CORE: |
| /* XXX: TODO: update DBSR[MRR] */ |
| if (level) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: reset the PowerPC core\n", __func__); |
| } |
| #endif |
| ppc40x_core_reset(env); |
| } |
| break; |
| case PPC40x_INPUT_CINT: |
| /* Level sensitive - active high */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the critical IRQ state to %d\n", |
| __func__, level); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_CEXT, level); |
| break; |
| case PPC40x_INPUT_INT: |
| /* Level sensitive - active high */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the external IRQ state to %d\n", |
| __func__, level); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_EXT, level); |
| break; |
| case PPC40x_INPUT_HALT: |
| /* Level sensitive - active low */ |
| if (level) { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: stop the CPU\n", __func__); |
| } |
| #endif |
| env->halted = 1; |
| } else { |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: restart the CPU\n", __func__); |
| } |
| #endif |
| env->halted = 0; |
| } |
| break; |
| case PPC40x_INPUT_DEBUG: |
| /* Level sensitive - active high */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: set the debug pin state to %d\n", |
| __func__, level); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level); |
| break; |
| default: |
| /* Unknown pin - do nothing */ |
| #if defined(PPC_DEBUG_IRQ) |
| if (loglevel & CPU_LOG_INT) { |
| fprintf(logfile, "%s: unknown IRQ pin %d\n", __func__, pin); |
| } |
| #endif |
| return; |
| } |
| if (level) |
| env->irq_input_state |= 1 << pin; |
| else |
| env->irq_input_state &= ~(1 << pin); |
| } |
| } |
| |
| void ppc40x_irq_init (CPUState *env) |
| { |
| env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq, |
| env, PPC40x_INPUT_NB); |
| } |
| |
| /*****************************************************************************/ |
| /* PowerPC time base and decrementer emulation */ |
| struct ppc_tb_t { |
| /* Time base management */ |
| int64_t tb_offset; /* Compensation */ |
| int64_t atb_offset; /* Compensation */ |
| uint32_t tb_freq; /* TB frequency */ |
| /* Decrementer management */ |
| uint64_t decr_next; /* Tick for next decr interrupt */ |
| uint32_t decr_freq; /* decrementer frequency */ |
| struct QEMUTimer *decr_timer; |
| /* Hypervisor decrementer management */ |
| uint64_t hdecr_next; /* Tick for next hdecr interrupt */ |
| struct QEMUTimer *hdecr_timer; |
| uint64_t purr_load; |
| uint64_t purr_start; |
| void *opaque; |
| }; |
| |
| static always_inline 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, ticks_per_sec) + tb_offset; |
| } |
| |
| uint32_t cpu_ppc_load_tbl (CPUState *env) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| uint64_t tb; |
| |
| tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
| #if defined(PPC_DEBUG_TB) |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: tb %016" PRIx64 "\n", __func__, tb); |
| } |
| #endif |
| |
| return tb & 0xFFFFFFFF; |
| } |
| |
| static always_inline uint32_t _cpu_ppc_load_tbu (CPUState *env) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| uint64_t tb; |
| |
| tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset); |
| #if defined(PPC_DEBUG_TB) |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: tb %016" PRIx64 "\n", __func__, tb); |
| } |
| #endif |
| |
| return tb >> 32; |
| } |
| |
| uint32_t cpu_ppc_load_tbu (CPUState *env) |
| { |
| return _cpu_ppc_load_tbu(env); |
| } |
| |
| static always_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, ticks_per_sec); |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: tb %016" PRIx64 " offset %08" PRIx64 "\n", |
| __func__, value, *tb_offsetp); |
| } |
| #endif |
| } |
| |
| void cpu_ppc_store_tbl (CPUState *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(vm_clock), tb_env->tb_offset); |
| tb &= 0xFFFFFFFF00000000ULL; |
| cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
| &tb_env->tb_offset, tb | (uint64_t)value); |
| } |
| |
| static always_inline void _cpu_ppc_store_tbu (CPUState *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(vm_clock), tb_env->tb_offset); |
| tb &= 0x00000000FFFFFFFFULL; |
| cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
| &tb_env->tb_offset, ((uint64_t)value << 32) | tb); |
| } |
| |
| void cpu_ppc_store_tbu (CPUState *env, uint32_t value) |
| { |
| _cpu_ppc_store_tbu(env, value); |
| } |
| |
| uint32_t cpu_ppc_load_atbl (CPUState *env) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| uint64_t tb; |
| |
| tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
| #if defined(PPC_DEBUG_TB) |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: tb %016" PRIx64 "\n", __func__, tb); |
| } |
| #endif |
| |
| return tb & 0xFFFFFFFF; |
| } |
| |
| uint32_t cpu_ppc_load_atbu (CPUState *env) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| uint64_t tb; |
| |
| tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset); |
| #if defined(PPC_DEBUG_TB) |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: tb %016" PRIx64 "\n", __func__, tb); |
| } |
| #endif |
| |
| return tb >> 32; |
| } |
| |
| void cpu_ppc_store_atbl (CPUState *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(vm_clock), tb_env->atb_offset); |
| tb &= 0xFFFFFFFF00000000ULL; |
| cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
| &tb_env->atb_offset, tb | (uint64_t)value); |
| } |
| |
| void cpu_ppc_store_atbu (CPUState *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(vm_clock), tb_env->atb_offset); |
| tb &= 0x00000000FFFFFFFFULL; |
| cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock), |
| &tb_env->atb_offset, ((uint64_t)value << 32) | tb); |
| } |
| |
| static void cpu_ppc_tb_stop (CPUState *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(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 (CPUState *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(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 always_inline uint32_t _cpu_ppc_load_decr (CPUState *env, |
| uint64_t *next) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| uint32_t decr; |
| int64_t diff; |
| |
| diff = tb_env->decr_next - qemu_get_clock(vm_clock); |
| if (diff >= 0) |
| decr = muldiv64(diff, tb_env->decr_freq, ticks_per_sec); |
| else |
| decr = -muldiv64(-diff, tb_env->decr_freq, ticks_per_sec); |
| #if defined(PPC_DEBUG_TB) |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: %08" PRIx32 "\n", __func__, decr); |
| } |
| #endif |
| |
| return decr; |
| } |
| |
| uint32_t cpu_ppc_load_decr (CPUState *env) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| |
| return _cpu_ppc_load_decr(env, &tb_env->decr_next); |
| } |
| |
| uint32_t cpu_ppc_load_hdecr (CPUState *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 (CPUState *env) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| uint64_t diff; |
| |
| diff = qemu_get_clock(vm_clock) - tb_env->purr_start; |
| |
| return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, ticks_per_sec); |
| } |
| |
| /* When decrementer expires, |
| * all we need to do is generate or queue a CPU exception |
| */ |
| static always_inline void cpu_ppc_decr_excp (CPUState *env) |
| { |
| /* Raise it */ |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "raise decrementer exception\n"); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_DECR, 1); |
| } |
| |
| static always_inline void cpu_ppc_hdecr_excp (CPUState *env) |
| { |
| /* Raise it */ |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "raise decrementer exception\n"); |
| } |
| #endif |
| ppc_set_irq(env, PPC_INTERRUPT_HDECR, 1); |
| } |
| |
| static void __cpu_ppc_store_decr (CPUState *env, uint64_t *nextp, |
| struct QEMUTimer *timer, |
| void (*raise_excp)(CPUState *), |
| uint32_t decr, uint32_t value, |
| int is_excp) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| uint64_t now, next; |
| |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__, |
| decr, value); |
| } |
| #endif |
| now = qemu_get_clock(vm_clock); |
| next = now + muldiv64(value, 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 ((value & 0x80000000) && !(decr & 0x80000000)) |
| (*raise_excp)(env); |
| } |
| |
| static always_inline void _cpu_ppc_store_decr (CPUState *env, uint32_t decr, |
| uint32_t value, int is_excp) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| |
| __cpu_ppc_store_decr(env, &tb_env->decr_next, tb_env->decr_timer, |
| &cpu_ppc_decr_excp, decr, value, is_excp); |
| } |
| |
| void cpu_ppc_store_decr (CPUState *env, uint32_t value) |
| { |
| _cpu_ppc_store_decr(env, cpu_ppc_load_decr(env), value, 0); |
| } |
| |
| static void cpu_ppc_decr_cb (void *opaque) |
| { |
| _cpu_ppc_store_decr(opaque, 0x00000000, 0xFFFFFFFF, 1); |
| } |
| |
| static always_inline void _cpu_ppc_store_hdecr (CPUState *env, uint32_t hdecr, |
| uint32_t value, int is_excp) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| |
| if (tb_env->hdecr_timer != NULL) { |
| __cpu_ppc_store_decr(env, &tb_env->hdecr_next, tb_env->hdecr_timer, |
| &cpu_ppc_hdecr_excp, hdecr, value, is_excp); |
| } |
| } |
| |
| void cpu_ppc_store_hdecr (CPUState *env, uint32_t value) |
| { |
| _cpu_ppc_store_hdecr(env, cpu_ppc_load_hdecr(env), value, 0); |
| } |
| |
| static void cpu_ppc_hdecr_cb (void *opaque) |
| { |
| _cpu_ppc_store_hdecr(opaque, 0x00000000, 0xFFFFFFFF, 1); |
| } |
| |
| void cpu_ppc_store_purr (CPUState *env, uint64_t value) |
| { |
| ppc_tb_t *tb_env = env->tb_env; |
| |
| tb_env->purr_load = value; |
| tb_env->purr_start = qemu_get_clock(vm_clock); |
| } |
| |
| static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq) |
| { |
| CPUState *env = opaque; |
| 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(env, 0xFFFFFFFF, 0xFFFFFFFF, 0); |
| _cpu_ppc_store_hdecr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0); |
| cpu_ppc_store_purr(env, 0x0000000000000000ULL); |
| } |
| |
| /* Set up (once) timebase frequency (in Hz) */ |
| clk_setup_cb cpu_ppc_tb_init (CPUState *env, uint32_t freq) |
| { |
| ppc_tb_t *tb_env; |
| |
| tb_env = qemu_mallocz(sizeof(ppc_tb_t)); |
| if (tb_env == NULL) |
| return NULL; |
| env->tb_env = tb_env; |
| /* Create new timer */ |
| tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_ppc_decr_cb, env); |
| if (0) { |
| /* XXX: find a suitable condition to enable the hypervisor decrementer |
| */ |
| tb_env->hdecr_timer = qemu_new_timer(vm_clock, &cpu_ppc_hdecr_cb, env); |
| } 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 (CPUState *env) |
| { |
| return cpu_ppc_tb_init(env, 7812500); |
| } |
| #endif |
| |
| void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value) |
| { |
| _cpu_ppc_store_tbu(env, value); |
| } |
| |
| uint32_t cpu_ppc601_load_rtcu (CPUState *env) |
| { |
| return _cpu_ppc_load_tbu(env); |
| } |
| |
| void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value) |
| { |
| cpu_ppc_store_tbl(env, value & 0x3FFFFF80); |
| } |
| |
| uint32_t cpu_ppc601_load_rtcl (CPUState *env) |
| { |
| return cpu_ppc_load_tbl(env) & 0x3FFFFF80; |
| } |
| |
| /*****************************************************************************/ |
| /* Embedded PowerPC timers */ |
| |
| /* PIT, FIT & WDT */ |
| typedef struct ppcemb_timer_t ppcemb_timer_t; |
| struct ppcemb_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; |
| }; |
| |
| /* Fixed interval timer */ |
| static void cpu_4xx_fit_cb (void *opaque) |
| { |
| CPUState *env; |
| ppc_tb_t *tb_env; |
| ppcemb_timer_t *ppcemb_timer; |
| uint64_t now, next; |
| |
| env = opaque; |
| tb_env = env->tb_env; |
| ppcemb_timer = tb_env->opaque; |
| now = qemu_get_clock(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, ticks_per_sec, tb_env->tb_freq); |
| if (next == now) |
| next++; |
| qemu_mod_timer(ppcemb_timer->fit_timer, next); |
| env->spr[SPR_40x_TSR] |= 1 << 26; |
| if ((env->spr[SPR_40x_TCR] >> 23) & 0x1) |
| ppc_set_irq(env, PPC_INTERRUPT_FIT, 1); |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: ir %d TCR " ADDRX " TSR " ADDRX "\n", __func__, |
| (int)((env->spr[SPR_40x_TCR] >> 23) & 0x1), |
| env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); |
| } |
| #endif |
| } |
| |
| /* Programmable interval timer */ |
| static void start_stop_pit (CPUState *env, ppc_tb_t *tb_env, int is_excp) |
| { |
| ppcemb_timer_t *ppcemb_timer; |
| uint64_t now, next; |
| |
| ppcemb_timer = tb_env->opaque; |
| if (ppcemb_timer->pit_reload <= 1 || |
| !((env->spr[SPR_40x_TCR] >> 26) & 0x1) || |
| (is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) { |
| /* Stop PIT */ |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: stop PIT\n", __func__); |
| } |
| #endif |
| qemu_del_timer(tb_env->decr_timer); |
| } else { |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: start PIT %016" PRIx64 "\n", |
| __func__, ppcemb_timer->pit_reload); |
| } |
| #endif |
| now = qemu_get_clock(vm_clock); |
| next = now + muldiv64(ppcemb_timer->pit_reload, |
| 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) |
| { |
| CPUState *env; |
| ppc_tb_t *tb_env; |
| ppcemb_timer_t *ppcemb_timer; |
| |
| env = opaque; |
| tb_env = env->tb_env; |
| ppcemb_timer = tb_env->opaque; |
| env->spr[SPR_40x_TSR] |= 1 << 27; |
| if ((env->spr[SPR_40x_TCR] >> 26) & 0x1) |
| ppc_set_irq(env, PPC_INTERRUPT_PIT, 1); |
| start_stop_pit(env, tb_env, 1); |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: ar %d ir %d TCR " ADDRX " TSR " ADDRX " " |
| "%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], |
| ppcemb_timer->pit_reload); |
| } |
| #endif |
| } |
| |
| /* Watchdog timer */ |
| static void cpu_4xx_wdt_cb (void *opaque) |
| { |
| CPUState *env; |
| ppc_tb_t *tb_env; |
| ppcemb_timer_t *ppcemb_timer; |
| uint64_t now, next; |
| |
| env = opaque; |
| tb_env = env->tb_env; |
| ppcemb_timer = tb_env->opaque; |
| now = qemu_get_clock(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, ticks_per_sec, tb_env->decr_freq); |
| if (next == now) |
| next++; |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: TCR " ADDRX " TSR " ADDRX "\n", __func__, |
| env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]); |
| } |
| #endif |
| switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) { |
| case 0x0: |
| case 0x1: |
| qemu_mod_timer(ppcemb_timer->wdt_timer, next); |
| ppcemb_timer->wdt_next = next; |
| env->spr[SPR_40x_TSR] |= 1 << 31; |
| break; |
| case 0x2: |
| qemu_mod_timer(ppcemb_timer->wdt_timer, next); |
| ppcemb_timer->wdt_next = next; |
| env->spr[SPR_40x_TSR] |= 1 << 30; |
| if ((env->spr[SPR_40x_TCR] >> 27) & 0x1) |
| ppc_set_irq(env, 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(env); |
| break; |
| case 0x2: /* Chip reset */ |
| ppc40x_chip_reset(env); |
| break; |
| case 0x3: /* System reset */ |
| ppc40x_system_reset(env); |
| break; |
| } |
| } |
| } |
| |
| void store_40x_pit (CPUState *env, target_ulong val) |
| { |
| ppc_tb_t *tb_env; |
| ppcemb_timer_t *ppcemb_timer; |
| |
| tb_env = env->tb_env; |
| ppcemb_timer = tb_env->opaque; |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s val" ADDRX "\n", __func__, val); |
| } |
| #endif |
| ppcemb_timer->pit_reload = val; |
| start_stop_pit(env, tb_env, 0); |
| } |
| |
| target_ulong load_40x_pit (CPUState *env) |
| { |
| return cpu_ppc_load_decr(env); |
| } |
| |
| void store_booke_tsr (CPUState *env, target_ulong val) |
| { |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: val " ADDRX "\n", __func__, val); |
| } |
| #endif |
| env->spr[SPR_40x_TSR] &= ~(val & 0xFC000000); |
| if (val & 0x80000000) |
| ppc_set_irq(env, PPC_INTERRUPT_PIT, 0); |
| } |
| |
| void store_booke_tcr (CPUState *env, target_ulong val) |
| { |
| ppc_tb_t *tb_env; |
| |
| tb_env = env->tb_env; |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s: val " ADDRX "\n", __func__, val); |
| } |
| #endif |
| env->spr[SPR_40x_TCR] = val & 0xFFC00000; |
| start_stop_pit(env, tb_env, 1); |
| cpu_4xx_wdt_cb(env); |
| } |
| |
| static void ppc_emb_set_tb_clk (void *opaque, uint32_t freq) |
| { |
| CPUState *env = opaque; |
| ppc_tb_t *tb_env = env->tb_env; |
| |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s set new frequency to %" PRIu32 "\n", __func__, |
| freq); |
| } |
| #endif |
| tb_env->tb_freq = freq; |
| tb_env->decr_freq = freq; |
| /* XXX: we should also update all timers */ |
| } |
| |
| clk_setup_cb ppc_emb_timers_init (CPUState *env, uint32_t freq) |
| { |
| ppc_tb_t *tb_env; |
| ppcemb_timer_t *ppcemb_timer; |
| |
| tb_env = qemu_mallocz(sizeof(ppc_tb_t)); |
| if (tb_env == NULL) { |
| return NULL; |
| } |
| env->tb_env = tb_env; |
| ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t)); |
| tb_env->tb_freq = freq; |
| tb_env->decr_freq = freq; |
| tb_env->opaque = ppcemb_timer; |
| #ifdef PPC_DEBUG_TB |
| if (loglevel != 0) { |
| fprintf(logfile, "%s freq %" PRIu32 "\n", __func__, freq); |
| } |
| #endif |
| if (ppcemb_timer != NULL) { |
| /* We use decr timer for PIT */ |
| tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_4xx_pit_cb, env); |
| ppcemb_timer->fit_timer = |
| qemu_new_timer(vm_clock, &cpu_4xx_fit_cb, env); |
| ppcemb_timer->wdt_timer = |
| qemu_new_timer(vm_clock, &cpu_4xx_wdt_cb, env); |
| } |
| |
| return &ppc_emb_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, target_ulong *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, target_ulong 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 (CPUState *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 (CPUState *env, int (*read_error)(int dcrn), |
| int (*write_error)(int dcrn)) |
| { |
| ppc_dcr_t *dcr_env; |
| |
| dcr_env = qemu_mallocz(sizeof(ppc_dcr_t)); |
| if (dcr_env == NULL) |
| return -1; |
| dcr_env->read_error = read_error; |
| dcr_env->write_error = write_error; |
| env->dcr_env = dcr_env; |
| |
| return 0; |
| } |
| |
| #if 0 |
| /*****************************************************************************/ |
| /* Handle system reset (for now, just stop emulation) */ |
| void cpu_ppc_reset (CPUState *env) |
| { |
| printf("Reset asked... Stop emulation\n"); |
| abort(); |
| } |
| #endif |
| |
| /*****************************************************************************/ |
| /* 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); |
| cpu_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); |
| } |
| |
| void NVRAM_set_byte (nvram_t *nvram, uint32_t addr, uint8_t value) |
| { |
| nvram_write(nvram, addr, value); |
| } |
| |
| uint8_t NVRAM_get_byte (nvram_t *nvram, uint32_t addr) |
| { |
| return nvram_read(nvram, addr); |
| } |
| |
| 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); |
| } |
| |
| 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; |
| } |
| |
| 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; |
| } |
| |
| 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 ? */ |
| strcpy((char *)(phys_ram_base + 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; |
| } |
