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-rw-r--r--hw/sun4u.c206
1 files changed, 173 insertions, 33 deletions
diff --git a/hw/sun4u.c b/hw/sun4u.c
index c1530a653b..1e011233e4 100644
--- a/hw/sun4u.c
+++ b/hw/sun4u.c
@@ -40,6 +40,7 @@
//#define DEBUG_IRQ
//#define DEBUG_EBUS
+//#define DEBUG_TIMER
#ifdef DEBUG_IRQ
#define CPUIRQ_DPRINTF(fmt, ...) \
@@ -55,6 +56,13 @@
#define EBUS_DPRINTF(fmt, ...)
#endif
+#ifdef DEBUG_TIMER
+#define TIMER_DPRINTF(fmt, ...) \
+ do { printf("TIMER: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define TIMER_DPRINTF(fmt, ...)
+#endif
+
#define KERNEL_LOAD_ADDR 0x00404000
#define CMDLINE_ADDR 0x003ff000
#define INITRD_LOAD_ADDR 0x00300000
@@ -282,6 +290,12 @@ void cpu_check_irqs(CPUState *env)
}
}
+static void cpu_kick_irq(CPUState *env)
+{
+ env->halted = 0;
+ cpu_check_irqs(env);
+}
+
static void cpu_set_irq(void *opaque, int irq, int level)
{
CPUState *env = opaque;
@@ -303,6 +317,52 @@ typedef struct ResetData {
uint64_t prom_addr;
} ResetData;
+void cpu_put_timer(QEMUFile *f, CPUTimer *s)
+{
+ qemu_put_be32s(f, &s->frequency);
+ qemu_put_be32s(f, &s->disabled);
+ qemu_put_be64s(f, &s->disabled_mask);
+ qemu_put_sbe64s(f, &s->clock_offset);
+
+ qemu_put_timer(f, s->qtimer);
+}
+
+void cpu_get_timer(QEMUFile *f, CPUTimer *s)
+{
+ qemu_get_be32s(f, &s->frequency);
+ qemu_get_be32s(f, &s->disabled);
+ qemu_get_be64s(f, &s->disabled_mask);
+ qemu_get_sbe64s(f, &s->clock_offset);
+
+ qemu_get_timer(f, s->qtimer);
+}
+
+static CPUTimer* cpu_timer_create(const char* name, CPUState *env,
+ QEMUBHFunc *cb, uint32_t frequency,
+ uint64_t disabled_mask)
+{
+ CPUTimer *timer = qemu_mallocz(sizeof (CPUTimer));
+
+ timer->name = name;
+ timer->frequency = frequency;
+ timer->disabled_mask = disabled_mask;
+
+ timer->disabled = 1;
+ timer->clock_offset = qemu_get_clock(vm_clock);
+
+ timer->qtimer = qemu_new_timer(vm_clock, cb, env);
+
+ return timer;
+}
+
+static void cpu_timer_reset(CPUTimer *timer)
+{
+ timer->disabled = 1;
+ timer->clock_offset = qemu_get_clock(vm_clock);
+
+ qemu_del_timer(timer->qtimer);
+}
+
static void main_cpu_reset(void *opaque)
{
ResetData *s = (ResetData *)opaque;
@@ -310,15 +370,11 @@ static void main_cpu_reset(void *opaque)
static unsigned int nr_resets;
cpu_reset(env);
- env->tick_cmpr = TICK_INT_DIS | 0;
- ptimer_set_limit(env->tick, TICK_MAX, 1);
- ptimer_run(env->tick, 1);
- env->stick_cmpr = TICK_INT_DIS | 0;
- ptimer_set_limit(env->stick, TICK_MAX, 1);
- ptimer_run(env->stick, 1);
- env->hstick_cmpr = TICK_INT_DIS | 0;
- ptimer_set_limit(env->hstick, TICK_MAX, 1);
- ptimer_run(env->hstick, 1);
+
+ cpu_timer_reset(env->tick);
+ cpu_timer_reset(env->stick);
+ cpu_timer_reset(env->hstick);
+
env->gregs[1] = 0; // Memory start
env->gregs[2] = ram_size; // Memory size
env->gregs[3] = 0; // Machine description XXX
@@ -335,44 +391,127 @@ static void tick_irq(void *opaque)
{
CPUState *env = opaque;
- if (!(env->tick_cmpr & TICK_INT_DIS)) {
- env->softint |= SOFTINT_TIMER;
- cpu_interrupt(env, CPU_INTERRUPT_TIMER);
+ CPUTimer* timer = env->tick;
+
+ if (timer->disabled) {
+ CPUIRQ_DPRINTF("tick_irq: softint disabled\n");
+ return;
+ } else {
+ CPUIRQ_DPRINTF("tick: fire\n");
}
+
+ env->softint |= SOFTINT_TIMER;
+ cpu_kick_irq(env);
}
static void stick_irq(void *opaque)
{
CPUState *env = opaque;
- if (!(env->stick_cmpr & TICK_INT_DIS)) {
- env->softint |= SOFTINT_STIMER;
- cpu_interrupt(env, CPU_INTERRUPT_TIMER);
+ CPUTimer* timer = env->stick;
+
+ if (timer->disabled) {
+ CPUIRQ_DPRINTF("stick_irq: softint disabled\n");
+ return;
+ } else {
+ CPUIRQ_DPRINTF("stick: fire\n");
}
+
+ env->softint |= SOFTINT_STIMER;
+ cpu_kick_irq(env);
}
static void hstick_irq(void *opaque)
{
CPUState *env = opaque;
- if (!(env->hstick_cmpr & TICK_INT_DIS)) {
- cpu_interrupt(env, CPU_INTERRUPT_TIMER);
+ CPUTimer* timer = env->hstick;
+
+ if (timer->disabled) {
+ CPUIRQ_DPRINTF("hstick_irq: softint disabled\n");
+ return;
+ } else {
+ CPUIRQ_DPRINTF("hstick: fire\n");
}
+
+ env->softint |= SOFTINT_STIMER;
+ cpu_kick_irq(env);
+}
+
+static int64_t cpu_to_timer_ticks(int64_t cpu_ticks, uint32_t frequency)
+{
+ return muldiv64(cpu_ticks, get_ticks_per_sec(), frequency);
+}
+
+static uint64_t timer_to_cpu_ticks(int64_t timer_ticks, uint32_t frequency)
+{
+ return muldiv64(timer_ticks, frequency, get_ticks_per_sec());
}
-void cpu_tick_set_count(void *opaque, uint64_t count)
+void cpu_tick_set_count(CPUTimer *timer, uint64_t count)
{
- ptimer_set_count(opaque, -count);
+ uint64_t real_count = count & ~timer->disabled_mask;
+ uint64_t disabled_bit = count & timer->disabled_mask;
+
+ int64_t vm_clock_offset = qemu_get_clock(vm_clock) -
+ cpu_to_timer_ticks(real_count, timer->frequency);
+
+ TIMER_DPRINTF("%s set_count count=0x%016lx (%s) p=%p\n",
+ timer->name, real_count,
+ timer->disabled?"disabled":"enabled", timer);
+
+ timer->disabled = disabled_bit ? 1 : 0;
+ timer->clock_offset = vm_clock_offset;
}
-uint64_t cpu_tick_get_count(void *opaque)
+uint64_t cpu_tick_get_count(CPUTimer *timer)
{
- return -ptimer_get_count(opaque);
+ uint64_t real_count = timer_to_cpu_ticks(
+ qemu_get_clock(vm_clock) - timer->clock_offset,
+ timer->frequency);
+
+ TIMER_DPRINTF("%s get_count count=0x%016lx (%s) p=%p\n",
+ timer->name, real_count,
+ timer->disabled?"disabled":"enabled", timer);
+
+ if (timer->disabled)
+ real_count |= timer->disabled_mask;
+
+ return real_count;
}
-void cpu_tick_set_limit(void *opaque, uint64_t limit)
+void cpu_tick_set_limit(CPUTimer *timer, uint64_t limit)
{
- ptimer_set_limit(opaque, -limit, 0);
+ int64_t now = qemu_get_clock(vm_clock);
+
+ uint64_t real_limit = limit & ~timer->disabled_mask;
+ timer->disabled = (limit & timer->disabled_mask) ? 1 : 0;
+
+ int64_t expires = cpu_to_timer_ticks(real_limit, timer->frequency) +
+ timer->clock_offset;
+
+ if (expires < now) {
+ expires = now + 1;
+ }
+
+ TIMER_DPRINTF("%s set_limit limit=0x%016lx (%s) p=%p "
+ "called with limit=0x%016lx at 0x%016lx (delta=0x%016lx)\n",
+ timer->name, real_limit,
+ timer->disabled?"disabled":"enabled",
+ timer, limit,
+ timer_to_cpu_ticks(now - timer->clock_offset,
+ timer->frequency),
+ timer_to_cpu_ticks(expires - now, timer->frequency));
+
+ if (!real_limit) {
+ TIMER_DPRINTF("%s set_limit limit=ZERO - not starting timer\n",
+ timer->name);
+ qemu_del_timer(timer->qtimer);
+ } else if (timer->disabled) {
+ qemu_del_timer(timer->qtimer);
+ } else {
+ qemu_mod_timer(timer->qtimer, expires);
+ }
}
static void ebus_mmio_mapfunc(PCIDevice *pci_dev, int region_num,
@@ -559,9 +698,12 @@ device_init(ram_register_devices);
static CPUState *cpu_devinit(const char *cpu_model, const struct hwdef *hwdef)
{
CPUState *env;
- QEMUBH *bh;
ResetData *reset_info;
+ uint32_t tick_frequency = 100*1000000;
+ uint32_t stick_frequency = 100*1000000;
+ uint32_t hstick_frequency = 100*1000000;
+
if (!cpu_model)
cpu_model = hwdef->default_cpu_model;
env = cpu_init(cpu_model);
@@ -569,17 +711,15 @@ static CPUState *cpu_devinit(const char *cpu_model, const struct hwdef *hwdef)
fprintf(stderr, "Unable to find Sparc CPU definition\n");
exit(1);
}
- bh = qemu_bh_new(tick_irq, env);
- env->tick = ptimer_init(bh);
- ptimer_set_period(env->tick, 1ULL);
- bh = qemu_bh_new(stick_irq, env);
- env->stick = ptimer_init(bh);
- ptimer_set_period(env->stick, 1ULL);
+ env->tick = cpu_timer_create("tick", env, tick_irq,
+ tick_frequency, TICK_NPT_MASK);
+
+ env->stick = cpu_timer_create("stick", env, stick_irq,
+ stick_frequency, TICK_INT_DIS);
- bh = qemu_bh_new(hstick_irq, env);
- env->hstick = ptimer_init(bh);
- ptimer_set_period(env->hstick, 1ULL);
+ env->hstick = cpu_timer_create("hstick", env, hstick_irq,
+ hstick_frequency, TICK_INT_DIS);
reset_info = qemu_mallocz(sizeof(ResetData));
reset_info->env = env;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-28 23:12:04 +0000