| /* |
| * Intel XScale PXA255/270 OS Timers. |
| * |
| * Copyright (c) 2006 Openedhand Ltd. |
| * Copyright (c) 2006 Thorsten Zitterell |
| * |
| * This code is licensed under the GPL. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "hw/irq.h" |
| #include "hw/qdev-properties.h" |
| #include "qemu/timer.h" |
| #include "system/runstate.h" |
| #include "hw/sysbus.h" |
| #include "migration/vmstate.h" |
| #include "qemu/log.h" |
| #include "qemu/module.h" |
| #include "qom/object.h" |
| #include "system/watchdog.h" |
| |
| #define OSMR0 0x00 |
| #define OSMR1 0x04 |
| #define OSMR2 0x08 |
| #define OSMR3 0x0c |
| #define OSMR4 0x80 |
| #define OSMR5 0x84 |
| #define OSMR6 0x88 |
| #define OSMR7 0x8c |
| #define OSMR8 0x90 |
| #define OSMR9 0x94 |
| #define OSMR10 0x98 |
| #define OSMR11 0x9c |
| #define OSCR 0x10 /* OS Timer Count */ |
| #define OSCR4 0x40 |
| #define OSCR5 0x44 |
| #define OSCR6 0x48 |
| #define OSCR7 0x4c |
| #define OSCR8 0x50 |
| #define OSCR9 0x54 |
| #define OSCR10 0x58 |
| #define OSCR11 0x5c |
| #define OSSR 0x14 /* Timer status register */ |
| #define OWER 0x18 |
| #define OIER 0x1c /* Interrupt enable register 3-0 to E3-E0 */ |
| #define OMCR4 0xc0 /* OS Match Control registers */ |
| #define OMCR5 0xc4 |
| #define OMCR6 0xc8 |
| #define OMCR7 0xcc |
| #define OMCR8 0xd0 |
| #define OMCR9 0xd4 |
| #define OMCR10 0xd8 |
| #define OMCR11 0xdc |
| #define OSNR 0x20 |
| |
| #define PXA25X_FREQ 3686400 /* 3.6864 MHz */ |
| |
| static int pxa2xx_timer4_freq[8] = { |
| [0] = 0, |
| [1] = 32768, |
| [2] = 1000, |
| [3] = 1, |
| [4] = 1000000, |
| /* [5] is the "Externally supplied clock". Assign if necessary. */ |
| [5 ... 7] = 0, |
| }; |
| |
| #define TYPE_PXA2XX_TIMER "pxa2xx-timer" |
| OBJECT_DECLARE_SIMPLE_TYPE(PXA2xxTimerInfo, PXA2XX_TIMER) |
| |
| |
| typedef struct { |
| uint32_t value; |
| qemu_irq irq; |
| QEMUTimer *qtimer; |
| int num; |
| PXA2xxTimerInfo *info; |
| } PXA2xxTimer0; |
| |
| typedef struct { |
| PXA2xxTimer0 tm; |
| int32_t oldclock; |
| int32_t clock; |
| uint64_t lastload; |
| uint32_t freq; |
| uint32_t control; |
| } PXA2xxTimer4; |
| |
| struct PXA2xxTimerInfo { |
| SysBusDevice parent_obj; |
| |
| MemoryRegion iomem; |
| uint32_t flags; |
| |
| int32_t clock; |
| int32_t oldclock; |
| uint64_t lastload; |
| uint32_t freq; |
| PXA2xxTimer0 timer[4]; |
| uint32_t events; |
| uint32_t irq_enabled; |
| uint32_t reset3; |
| uint32_t snapshot; |
| |
| qemu_irq irq4; |
| PXA2xxTimer4 tm4[8]; |
| }; |
| |
| #define PXA2XX_TIMER_HAVE_TM4 0 |
| |
| static inline int pxa2xx_timer_has_tm4(PXA2xxTimerInfo *s) |
| { |
| return s->flags & (1 << PXA2XX_TIMER_HAVE_TM4); |
| } |
| |
| static void pxa2xx_timer_update(void *opaque, uint64_t now_qemu) |
| { |
| PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque; |
| int i; |
| uint32_t now_vm; |
| uint64_t new_qemu; |
| |
| now_vm = s->clock + |
| muldiv64(now_qemu - s->lastload, s->freq, NANOSECONDS_PER_SECOND); |
| |
| for (i = 0; i < 4; i ++) { |
| new_qemu = now_qemu + muldiv64((uint32_t) (s->timer[i].value - now_vm), |
| NANOSECONDS_PER_SECOND, s->freq); |
| timer_mod(s->timer[i].qtimer, new_qemu); |
| } |
| } |
| |
| static void pxa2xx_timer_update4(void *opaque, uint64_t now_qemu, int n) |
| { |
| PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque; |
| uint32_t now_vm; |
| uint64_t new_qemu; |
| static const int counters[8] = { 0, 0, 0, 0, 4, 4, 6, 6 }; |
| int counter; |
| |
| assert(n < ARRAY_SIZE(counters)); |
| if (s->tm4[n].control & (1 << 7)) |
| counter = n; |
| else |
| counter = counters[n]; |
| |
| if (!s->tm4[counter].freq) { |
| timer_del(s->tm4[n].tm.qtimer); |
| return; |
| } |
| |
| now_vm = s->tm4[counter].clock + muldiv64(now_qemu - |
| s->tm4[counter].lastload, |
| s->tm4[counter].freq, NANOSECONDS_PER_SECOND); |
| |
| new_qemu = now_qemu + muldiv64((uint32_t) (s->tm4[n].tm.value - now_vm), |
| NANOSECONDS_PER_SECOND, s->tm4[counter].freq); |
| timer_mod(s->tm4[n].tm.qtimer, new_qemu); |
| } |
| |
| static uint64_t pxa2xx_timer_read(void *opaque, hwaddr offset, |
| unsigned size) |
| { |
| PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque; |
| int tm = 0; |
| |
| switch (offset) { |
| case OSMR3: tm ++; |
| /* fall through */ |
| case OSMR2: tm ++; |
| /* fall through */ |
| case OSMR1: tm ++; |
| /* fall through */ |
| case OSMR0: |
| return s->timer[tm].value; |
| case OSMR11: tm ++; |
| /* fall through */ |
| case OSMR10: tm ++; |
| /* fall through */ |
| case OSMR9: tm ++; |
| /* fall through */ |
| case OSMR8: tm ++; |
| /* fall through */ |
| case OSMR7: tm ++; |
| /* fall through */ |
| case OSMR6: tm ++; |
| /* fall through */ |
| case OSMR5: tm ++; |
| /* fall through */ |
| case OSMR4: |
| if (!pxa2xx_timer_has_tm4(s)) |
| goto badreg; |
| return s->tm4[tm].tm.value; |
| case OSCR: |
| return s->clock + muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - |
| s->lastload, s->freq, NANOSECONDS_PER_SECOND); |
| case OSCR11: tm ++; |
| /* fall through */ |
| case OSCR10: tm ++; |
| /* fall through */ |
| case OSCR9: tm ++; |
| /* fall through */ |
| case OSCR8: tm ++; |
| /* fall through */ |
| case OSCR7: tm ++; |
| /* fall through */ |
| case OSCR6: tm ++; |
| /* fall through */ |
| case OSCR5: tm ++; |
| /* fall through */ |
| case OSCR4: |
| if (!pxa2xx_timer_has_tm4(s)) |
| goto badreg; |
| |
| if ((tm == 9 - 4 || tm == 11 - 4) && (s->tm4[tm].control & (1 << 9))) { |
| if (s->tm4[tm - 1].freq) |
| s->snapshot = s->tm4[tm - 1].clock + muldiv64( |
| qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - |
| s->tm4[tm - 1].lastload, |
| s->tm4[tm - 1].freq, NANOSECONDS_PER_SECOND); |
| else |
| s->snapshot = s->tm4[tm - 1].clock; |
| } |
| |
| if (!s->tm4[tm].freq) |
| return s->tm4[tm].clock; |
| return s->tm4[tm].clock + |
| muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - |
| s->tm4[tm].lastload, s->tm4[tm].freq, |
| NANOSECONDS_PER_SECOND); |
| case OIER: |
| return s->irq_enabled; |
| case OSSR: /* Status register */ |
| return s->events; |
| case OWER: |
| return s->reset3; |
| case OMCR11: tm ++; |
| /* fall through */ |
| case OMCR10: tm ++; |
| /* fall through */ |
| case OMCR9: tm ++; |
| /* fall through */ |
| case OMCR8: tm ++; |
| /* fall through */ |
| case OMCR7: tm ++; |
| /* fall through */ |
| case OMCR6: tm ++; |
| /* fall through */ |
| case OMCR5: tm ++; |
| /* fall through */ |
| case OMCR4: |
| if (!pxa2xx_timer_has_tm4(s)) |
| goto badreg; |
| return s->tm4[tm].control; |
| case OSNR: |
| return s->snapshot; |
| default: |
| qemu_log_mask(LOG_UNIMP, |
| "%s: unknown register 0x%02" HWADDR_PRIx "\n", |
| __func__, offset); |
| break; |
| badreg: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: incorrect register 0x%02" HWADDR_PRIx "\n", |
| __func__, offset); |
| } |
| |
| return 0; |
| } |
| |
| static void pxa2xx_timer_write(void *opaque, hwaddr offset, |
| uint64_t value, unsigned size) |
| { |
| int i, tm = 0; |
| PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque; |
| |
| switch (offset) { |
| case OSMR3: tm ++; |
| /* fall through */ |
| case OSMR2: tm ++; |
| /* fall through */ |
| case OSMR1: tm ++; |
| /* fall through */ |
| case OSMR0: |
| s->timer[tm].value = value; |
| pxa2xx_timer_update(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)); |
| break; |
| case OSMR11: tm ++; |
| /* fall through */ |
| case OSMR10: tm ++; |
| /* fall through */ |
| case OSMR9: tm ++; |
| /* fall through */ |
| case OSMR8: tm ++; |
| /* fall through */ |
| case OSMR7: tm ++; |
| /* fall through */ |
| case OSMR6: tm ++; |
| /* fall through */ |
| case OSMR5: tm ++; |
| /* fall through */ |
| case OSMR4: |
| if (!pxa2xx_timer_has_tm4(s)) |
| goto badreg; |
| s->tm4[tm].tm.value = value; |
| pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm); |
| break; |
| case OSCR: |
| s->oldclock = s->clock; |
| s->lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| s->clock = value; |
| pxa2xx_timer_update(s, s->lastload); |
| break; |
| case OSCR11: tm ++; |
| /* fall through */ |
| case OSCR10: tm ++; |
| /* fall through */ |
| case OSCR9: tm ++; |
| /* fall through */ |
| case OSCR8: tm ++; |
| /* fall through */ |
| case OSCR7: tm ++; |
| /* fall through */ |
| case OSCR6: tm ++; |
| /* fall through */ |
| case OSCR5: tm ++; |
| /* fall through */ |
| case OSCR4: |
| if (!pxa2xx_timer_has_tm4(s)) |
| goto badreg; |
| s->tm4[tm].oldclock = s->tm4[tm].clock; |
| s->tm4[tm].lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| s->tm4[tm].clock = value; |
| pxa2xx_timer_update4(s, s->tm4[tm].lastload, tm); |
| break; |
| case OIER: |
| s->irq_enabled = value & 0xfff; |
| break; |
| case OSSR: /* Status register */ |
| value &= s->events; |
| s->events &= ~value; |
| for (i = 0; i < 4; i ++, value >>= 1) |
| if (value & 1) |
| qemu_irq_lower(s->timer[i].irq); |
| if (pxa2xx_timer_has_tm4(s) && !(s->events & 0xff0) && value) |
| qemu_irq_lower(s->irq4); |
| break; |
| case OWER: /* XXX: Reset on OSMR3 match? */ |
| s->reset3 = value; |
| break; |
| case OMCR7: tm ++; |
| /* fall through */ |
| case OMCR6: tm ++; |
| /* fall through */ |
| case OMCR5: tm ++; |
| /* fall through */ |
| case OMCR4: |
| if (!pxa2xx_timer_has_tm4(s)) |
| goto badreg; |
| s->tm4[tm].control = value & 0x0ff; |
| /* XXX Stop if running (shouldn't happen) */ |
| if ((value & (1 << 7)) || tm == 0) |
| s->tm4[tm].freq = pxa2xx_timer4_freq[value & 7]; |
| else { |
| s->tm4[tm].freq = 0; |
| pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm); |
| } |
| break; |
| case OMCR11: tm ++; |
| /* fall through */ |
| case OMCR10: tm ++; |
| /* fall through */ |
| case OMCR9: tm ++; |
| /* fall through */ |
| case OMCR8: tm += 4; |
| if (!pxa2xx_timer_has_tm4(s)) |
| goto badreg; |
| s->tm4[tm].control = value & 0x3ff; |
| /* XXX Stop if running (shouldn't happen) */ |
| if ((value & (1 << 7)) || !(tm & 1)) |
| s->tm4[tm].freq = |
| pxa2xx_timer4_freq[(value & (1 << 8)) ? 0 : (value & 7)]; |
| else { |
| s->tm4[tm].freq = 0; |
| pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm); |
| } |
| break; |
| default: |
| qemu_log_mask(LOG_UNIMP, |
| "%s: unknown register 0x%02" HWADDR_PRIx " " |
| "(value 0x%08" PRIx64 ")\n", __func__, offset, value); |
| break; |
| badreg: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: incorrect register 0x%02" HWADDR_PRIx " " |
| "(value 0x%08" PRIx64 ")\n", __func__, offset, value); |
| } |
| } |
| |
| static const MemoryRegionOps pxa2xx_timer_ops = { |
| .read = pxa2xx_timer_read, |
| .write = pxa2xx_timer_write, |
| .endianness = DEVICE_NATIVE_ENDIAN, |
| }; |
| |
| static void pxa2xx_timer_tick(void *opaque) |
| { |
| PXA2xxTimer0 *t = (PXA2xxTimer0 *) opaque; |
| PXA2xxTimerInfo *i = t->info; |
| |
| if (i->irq_enabled & (1 << t->num)) { |
| i->events |= 1 << t->num; |
| qemu_irq_raise(t->irq); |
| } |
| |
| if (t->num == 3) |
| if (i->reset3 & 1) { |
| i->reset3 = 0; |
| watchdog_perform_action(); |
| } |
| } |
| |
| static void pxa2xx_timer_tick4(void *opaque) |
| { |
| PXA2xxTimer4 *t = (PXA2xxTimer4 *) opaque; |
| PXA2xxTimerInfo *i = (PXA2xxTimerInfo *) t->tm.info; |
| |
| pxa2xx_timer_tick(&t->tm); |
| if (t->control & (1 << 3)) |
| t->clock = 0; |
| if (t->control & (1 << 6)) |
| pxa2xx_timer_update4(i, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), t->tm.num - 4); |
| if (i->events & 0xff0) |
| qemu_irq_raise(i->irq4); |
| } |
| |
| static int pxa25x_timer_post_load(void *opaque, int version_id) |
| { |
| PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque; |
| int64_t now; |
| int i; |
| |
| now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| pxa2xx_timer_update(s, now); |
| |
| if (pxa2xx_timer_has_tm4(s)) |
| for (i = 0; i < 8; i ++) |
| pxa2xx_timer_update4(s, now, i); |
| |
| return 0; |
| } |
| |
| static void pxa2xx_timer_init(Object *obj) |
| { |
| PXA2xxTimerInfo *s = PXA2XX_TIMER(obj); |
| SysBusDevice *dev = SYS_BUS_DEVICE(obj); |
| |
| s->irq_enabled = 0; |
| s->oldclock = 0; |
| s->clock = 0; |
| s->lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| s->reset3 = 0; |
| |
| memory_region_init_io(&s->iomem, obj, &pxa2xx_timer_ops, s, |
| "pxa2xx-timer", 0x00001000); |
| sysbus_init_mmio(dev, &s->iomem); |
| } |
| |
| static void pxa2xx_timer_realize(DeviceState *dev, Error **errp) |
| { |
| PXA2xxTimerInfo *s = PXA2XX_TIMER(dev); |
| SysBusDevice *sbd = SYS_BUS_DEVICE(dev); |
| int i; |
| |
| for (i = 0; i < 4; i ++) { |
| s->timer[i].value = 0; |
| sysbus_init_irq(sbd, &s->timer[i].irq); |
| s->timer[i].info = s; |
| s->timer[i].num = i; |
| s->timer[i].qtimer = timer_new_ns(QEMU_CLOCK_VIRTUAL, |
| pxa2xx_timer_tick, &s->timer[i]); |
| } |
| |
| if (s->flags & (1 << PXA2XX_TIMER_HAVE_TM4)) { |
| sysbus_init_irq(sbd, &s->irq4); |
| |
| for (i = 0; i < 8; i ++) { |
| s->tm4[i].tm.value = 0; |
| s->tm4[i].tm.info = s; |
| s->tm4[i].tm.num = i + 4; |
| s->tm4[i].freq = 0; |
| s->tm4[i].control = 0x0; |
| s->tm4[i].tm.qtimer = timer_new_ns(QEMU_CLOCK_VIRTUAL, |
| pxa2xx_timer_tick4, &s->tm4[i]); |
| } |
| } |
| } |
| |
| static const VMStateDescription vmstate_pxa2xx_timer0_regs = { |
| .name = "pxa2xx_timer0", |
| .version_id = 2, |
| .minimum_version_id = 2, |
| .fields = (const VMStateField[]) { |
| VMSTATE_UINT32(value, PXA2xxTimer0), |
| VMSTATE_END_OF_LIST(), |
| }, |
| }; |
| |
| static const VMStateDescription vmstate_pxa2xx_timer4_regs = { |
| .name = "pxa2xx_timer4", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (const VMStateField[]) { |
| VMSTATE_STRUCT(tm, PXA2xxTimer4, 1, |
| vmstate_pxa2xx_timer0_regs, PXA2xxTimer0), |
| VMSTATE_INT32(oldclock, PXA2xxTimer4), |
| VMSTATE_INT32(clock, PXA2xxTimer4), |
| VMSTATE_UINT64(lastload, PXA2xxTimer4), |
| VMSTATE_UINT32(freq, PXA2xxTimer4), |
| VMSTATE_UINT32(control, PXA2xxTimer4), |
| VMSTATE_END_OF_LIST(), |
| }, |
| }; |
| |
| static bool pxa2xx_timer_has_tm4_test(void *opaque, int version_id) |
| { |
| return pxa2xx_timer_has_tm4(opaque); |
| } |
| |
| static const VMStateDescription vmstate_pxa2xx_timer_regs = { |
| .name = "pxa2xx_timer", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .post_load = pxa25x_timer_post_load, |
| .fields = (const VMStateField[]) { |
| VMSTATE_INT32(clock, PXA2xxTimerInfo), |
| VMSTATE_INT32(oldclock, PXA2xxTimerInfo), |
| VMSTATE_UINT64(lastload, PXA2xxTimerInfo), |
| VMSTATE_STRUCT_ARRAY(timer, PXA2xxTimerInfo, 4, 1, |
| vmstate_pxa2xx_timer0_regs, PXA2xxTimer0), |
| VMSTATE_UINT32(events, PXA2xxTimerInfo), |
| VMSTATE_UINT32(irq_enabled, PXA2xxTimerInfo), |
| VMSTATE_UINT32(reset3, PXA2xxTimerInfo), |
| VMSTATE_UINT32(snapshot, PXA2xxTimerInfo), |
| VMSTATE_STRUCT_ARRAY_TEST(tm4, PXA2xxTimerInfo, 8, |
| pxa2xx_timer_has_tm4_test, 0, |
| vmstate_pxa2xx_timer4_regs, PXA2xxTimer4), |
| VMSTATE_END_OF_LIST(), |
| } |
| }; |
| |
| static const Property pxa25x_timer_dev_properties[] = { |
| DEFINE_PROP_UINT32("freq", PXA2xxTimerInfo, freq, PXA25X_FREQ), |
| DEFINE_PROP_BIT("tm4", PXA2xxTimerInfo, flags, |
| PXA2XX_TIMER_HAVE_TM4, false), |
| }; |
| |
| static void pxa25x_timer_dev_class_init(ObjectClass *klass, const void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| dc->desc = "PXA25x timer"; |
| device_class_set_props(dc, pxa25x_timer_dev_properties); |
| } |
| |
| static const TypeInfo pxa25x_timer_dev_info = { |
| .name = "pxa25x-timer", |
| .parent = TYPE_PXA2XX_TIMER, |
| .instance_size = sizeof(PXA2xxTimerInfo), |
| .class_init = pxa25x_timer_dev_class_init, |
| }; |
| |
| static void pxa2xx_timer_class_init(ObjectClass *oc, const void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(oc); |
| |
| dc->realize = pxa2xx_timer_realize; |
| dc->vmsd = &vmstate_pxa2xx_timer_regs; |
| } |
| |
| static const TypeInfo pxa2xx_timer_type_info = { |
| .name = TYPE_PXA2XX_TIMER, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(PXA2xxTimerInfo), |
| .instance_init = pxa2xx_timer_init, |
| .abstract = true, |
| .class_init = pxa2xx_timer_class_init, |
| }; |
| |
| static void pxa2xx_timer_register_types(void) |
| { |
| type_register_static(&pxa2xx_timer_type_info); |
| type_register_static(&pxa25x_timer_dev_info); |
| } |
| |
| type_init(pxa2xx_timer_register_types) |
