diff options
Diffstat (limited to 'hw/hpet.c')
| -rw-r--r-- | hw/hpet.c | 53 |
1 files changed, 40 insertions, 13 deletions
@@ -60,7 +60,8 @@ typedef struct HPETState { uint64_t hpet_offset; qemu_irq irqs[HPET_NUM_IRQ_ROUTES]; uint8_t rtc_irq_level; - HPETTimer timer[HPET_NUM_TIMERS]; + uint8_t num_timers; + HPETTimer timer[HPET_MAX_TIMERS]; /* Memory-mapped, software visible registers */ uint64_t capability; /* capabilities */ @@ -196,12 +197,25 @@ static void hpet_pre_save(void *opaque) s->hpet_counter = hpet_get_ticks(s); } +static int hpet_pre_load(void *opaque) +{ + HPETState *s = opaque; + + /* version 1 only supports 3, later versions will load the actual value */ + s->num_timers = HPET_MIN_TIMERS; + return 0; +} + static int hpet_post_load(void *opaque, int version_id) { HPETState *s = opaque; /* Recalculate the offset between the main counter and guest time */ s->hpet_offset = ticks_to_ns(s->hpet_counter) - qemu_get_clock(vm_clock); + + /* Push number of timers into capability returned via HPET_ID */ + s->capability &= ~HPET_ID_NUM_TIM_MASK; + s->capability |= (s->num_timers - 1) << HPET_ID_NUM_TIM_SHIFT; return 0; } @@ -224,17 +238,19 @@ static const VMStateDescription vmstate_hpet_timer = { static const VMStateDescription vmstate_hpet = { .name = "hpet", - .version_id = 1, + .version_id = 2, .minimum_version_id = 1, .minimum_version_id_old = 1, .pre_save = hpet_pre_save, + .pre_load = hpet_pre_load, .post_load = hpet_post_load, .fields = (VMStateField []) { VMSTATE_UINT64(config, HPETState), VMSTATE_UINT64(isr, HPETState), VMSTATE_UINT64(hpet_counter, HPETState), - VMSTATE_STRUCT_ARRAY(timer, HPETState, HPET_NUM_TIMERS, 0, - vmstate_hpet_timer, HPETTimer), + VMSTATE_UINT8_V(num_timers, HPETState, 2), + VMSTATE_STRUCT_VARRAY_UINT8(timer, HPETState, num_timers, 0, + vmstate_hpet_timer, HPETTimer), VMSTATE_END_OF_LIST() } }; @@ -330,7 +346,7 @@ static uint32_t hpet_ram_readl(void *opaque, target_phys_addr_t addr) uint8_t timer_id = (addr - 0x100) / 0x20; HPETTimer *timer = &s->timer[timer_id]; - if (timer_id > HPET_NUM_TIMERS - 1) { + if (timer_id > s->num_timers) { DPRINTF("qemu: timer id out of range\n"); return 0; } @@ -421,7 +437,7 @@ static void hpet_ram_writel(void *opaque, target_phys_addr_t addr, HPETTimer *timer = &s->timer[timer_id]; DPRINTF("qemu: hpet_ram_writel timer_id = %#x \n", timer_id); - if (timer_id > HPET_NUM_TIMERS - 1) { + if (timer_id > s->num_timers) { DPRINTF("qemu: timer id out of range\n"); return; } @@ -504,7 +520,7 @@ static void hpet_ram_writel(void *opaque, target_phys_addr_t addr, /* Enable main counter and interrupt generation. */ s->hpet_offset = ticks_to_ns(s->hpet_counter) - qemu_get_clock(vm_clock); - for (i = 0; i < HPET_NUM_TIMERS; i++) { + for (i = 0; i < s->num_timers; i++) { if ((&s->timer[i])->cmp != ~0ULL) { hpet_set_timer(&s->timer[i]); } @@ -512,7 +528,7 @@ static void hpet_ram_writel(void *opaque, target_phys_addr_t addr, } else if (deactivating_bit(old_val, new_val, HPET_CFG_ENABLE)) { /* Halt main counter and disable interrupt generation. */ s->hpet_counter = hpet_get_ticks(s); - for (i = 0; i < HPET_NUM_TIMERS; i++) { + for (i = 0; i < s->num_timers; i++) { hpet_del_timer(&s->timer[i]); } } @@ -530,7 +546,7 @@ static void hpet_ram_writel(void *opaque, target_phys_addr_t addr, break; case HPET_STATUS: val = new_val & s->isr; - for (i = 0; i < HPET_NUM_TIMERS; i++) { + for (i = 0; i < s->num_timers; i++) { if (val & (1 << i)) { update_irq(&s->timer[i], 0); } @@ -589,7 +605,7 @@ static void hpet_reset(DeviceState *d) int i; static int count = 0; - for (i = 0; i < HPET_NUM_TIMERS; i++) { + for (i = 0; i < s->num_timers; i++) { HPETTimer *timer = &s->timer[i]; hpet_del_timer(timer); @@ -603,8 +619,9 @@ static void hpet_reset(DeviceState *d) s->hpet_counter = 0ULL; s->hpet_offset = 0ULL; - /* 64-bit main counter; 3 timers supported; LegacyReplacementRoute. */ - s->capability = 0x8086a201ULL; + /* 64-bit main counter; LegacyReplacementRoute. */ + s->capability = 0x8086a001ULL; + s->capability |= (s->num_timers - 1) << HPET_ID_NUM_TIM_SHIFT; s->capability |= ((HPET_CLK_PERIOD) << 32); s->config = 0ULL; if (count > 0) { @@ -637,7 +654,13 @@ static int hpet_init(SysBusDevice *dev) for (i = 0; i < HPET_NUM_IRQ_ROUTES; i++) { sysbus_init_irq(dev, &s->irqs[i]); } - for (i = 0; i < HPET_NUM_TIMERS; i++) { + + if (s->num_timers < HPET_MIN_TIMERS) { + s->num_timers = HPET_MIN_TIMERS; + } else if (s->num_timers > HPET_MAX_TIMERS) { + s->num_timers = HPET_MAX_TIMERS; + } + for (i = 0; i < HPET_MAX_TIMERS; i++) { timer = &s->timer[i]; timer->qemu_timer = qemu_new_timer(vm_clock, hpet_timer, timer); timer->tn = i; @@ -661,6 +684,10 @@ static SysBusDeviceInfo hpet_device_info = { .qdev.vmsd = &vmstate_hpet, .qdev.reset = hpet_reset, .init = hpet_init, + .qdev.props = (Property[]) { + DEFINE_PROP_UINT8("timers", HPETState, num_timers, HPET_MIN_TIMERS), + DEFINE_PROP_END_OF_LIST(), + }, }; static void hpet_register_device(void) |