/*
- * QEMU generic PPC hardware System Emulator
- *
- * Copyright (c) 2003-2004 Jocelyn Mayer
- *
+ * 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
* 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
+
+#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 (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);
+ }
+ 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)
+{
+ CPUState *env = opaque;
+ 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(env, 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(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) {
+ LOG_IRQ("%s: raise machine check state\n",
+ __func__);
+ 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) {
+ 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__);
+ 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:
+ LOG_IRQ("%s: set the RESET IRQ state to %d\n",
+ __func__, level);
+ ppc_set_irq(env, 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 (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;
+
+ 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(env, 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(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) {
+ LOG_IRQ("%s: raise machine check state\n",
+ __func__);
+ 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) {
+ LOG_IRQ("%s: stop the CPU\n", __func__);
+ env->halted = 1;
+ } else {
+ LOG_IRQ("%s: restart the CPU\n", __func__);
+ env->halted = 0;
+ }
+ break;
+ case PPC970_INPUT_HRESET:
+ /* Level sensitive - active low */
+ if (level) {
+#if 0 // XXX: TOFIX
+ LOG_IRQ("%s: reset the CPU\n", __func__);
+ cpu_reset(env);
+#endif
+ }
+ break;
+ case PPC970_INPUT_SRESET:
+ LOG_IRQ("%s: set the RESET IRQ state to %d\n",
+ __func__, level);
+ ppc_set_irq(env, 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 (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;
+
+ 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(env);
+ }
+ break;
+ case PPC40x_INPUT_RESET_CHIP:
+ if (level) {
+ LOG_IRQ("%s: reset the PowerPC chip\n", __func__);
+ ppc40x_chip_reset(env);
+ }
+ 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(env);
+ }
+ 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(env, 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(env, 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;
+ }
+ 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(env, 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 (CPUState *env)
+{
+ env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq,
+ env, PPC40x_INPUT_NB);
+}
+
+/* PowerPC E500 internal IRQ controller */
+static void ppce500_set_irq (void *opaque, int pin, int level)
+{
+ CPUState *env = opaque;
+ 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(env, 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(env, 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(env, 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(env, 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 (CPUState *env)
+{
+ env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq,
+ env, PPCE500_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);
+ LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
+
+ 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);
+ LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
+
+ 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);
+ LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n",
+ __func__, value, *tb_offsetp);
+}
+
+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);
+ LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
+
+ 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);
+ LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
+
+ 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);
+ LOG_TB("%s: %08" PRIx32 "\n", __func__, decr);
+
+ 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 */
+ LOG_TB("raise decrementer exception\n");
+ ppc_set_irq(env, PPC_INTERRUPT_DECR, 1);
+}
+
+static always_inline void cpu_ppc_hdecr_excp (CPUState *env)
+{
+ /* Raise it */
+ LOG_TB("raise decrementer exception\n");
+ 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;
+
+ LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__,
+ decr, value);
+ 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));
+ 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);
+ LOG_TB("%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]);
+}
+
+/* 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 */
+ LOG_TB("%s: stop PIT\n", __func__);
+ qemu_del_timer(tb_env->decr_timer);
+ } else {
+ LOG_TB("%s: start PIT %016" PRIx64 "\n",
+ __func__, ppcemb_timer->pit_reload);
+ 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);
+ LOG_TB("%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);
+}
+
+/* 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++;
+ LOG_TB("%s: TCR " ADDRX " TSR " ADDRX "\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(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;
+ LOG_TB("%s val" ADDRX "\n", __func__, val);
+ 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)
+{
+ LOG_TB("%s: val " ADDRX "\n", __func__, val);
+ 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;
+ LOG_TB("%s: val " ADDRX "\n", __func__, val);
+ 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;
+
+ 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_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));
+ 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;
+ LOG_TB("%s freq %" PRIu32 "\n", __func__, freq);
+ 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;
-#include <stdio.h>
-#include "vl.h"
+ 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);
-void ppc_prep_init (int ram_size, int vga_ram_size, int boot_device,
- DisplayState *ds, const char **fd_filename, int snapshot,
- const char *kernel_filename, const char *kernel_cmdline,
- const char *initrd_filename);
+ return 0;
-void ppc_init (int ram_size, int vga_ram_size, int boot_device,
- DisplayState *ds, const char **fd_filename, int snapshot,
- const char *kernel_filename, const char *kernel_cmdline,
- const char *initrd_filename)
+ 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)
{
- /* For now, only PREP is supported */
- return ppc_prep_init(ram_size, vga_ram_size, boot_device, ds, fd_filename,
- snapshot, kernel_filename, kernel_cmdline,
- initrd_filename);
+ 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));
+ 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 ? */
+ pstrcpy_targphys(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;
}
projects / qemu / blobdiff