2 * Intel XScale PXA255/270 OS Timers.
4 * Copyright (c) 2006 Openedhand Ltd.
5 * Copyright (c) 2006 Thorsten Zitterell
7 * This code is licensed under the GPL.
10 #include "qemu/osdep.h"
12 #include "qemu/timer.h"
13 #include "sysemu/sysemu.h"
14 #include "hw/arm/pxa.h"
15 #include "hw/sysbus.h"
29 #define OSCR 0x10 /* OS Timer Count */
38 #define OSSR 0x14 /* Timer status register */
40 #define OIER 0x1c /* Interrupt enable register 3-0 to E3-E0 */
41 #define OMCR4 0xc0 /* OS Match Control registers */
51 #define PXA25X_FREQ 3686400 /* 3.6864 MHz */
52 #define PXA27X_FREQ 3250000 /* 3.25 MHz */
54 static int pxa2xx_timer4_freq[8] = {
60 /* [5] is the "Externally supplied clock". Assign if necessary. */
64 #define TYPE_PXA2XX_TIMER "pxa2xx-timer"
65 #define PXA2XX_TIMER(obj) \
66 OBJECT_CHECK(PXA2xxTimerInfo, (obj), TYPE_PXA2XX_TIMER)
68 typedef struct PXA2xxTimerInfo PXA2xxTimerInfo;
75 PXA2xxTimerInfo *info;
87 struct PXA2xxTimerInfo {
88 SysBusDevice parent_obj;
97 PXA2xxTimer0 timer[4];
107 #define PXA2XX_TIMER_HAVE_TM4 0
109 static inline int pxa2xx_timer_has_tm4(PXA2xxTimerInfo *s)
111 return s->flags & (1 << PXA2XX_TIMER_HAVE_TM4);
114 static void pxa2xx_timer_update(void *opaque, uint64_t now_qemu)
116 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
122 muldiv64(now_qemu - s->lastload, s->freq, NANOSECONDS_PER_SECOND);
124 for (i = 0; i < 4; i ++) {
125 new_qemu = now_qemu + muldiv64((uint32_t) (s->timer[i].value - now_vm),
126 NANOSECONDS_PER_SECOND, s->freq);
127 timer_mod(s->timer[i].qtimer, new_qemu);
131 static void pxa2xx_timer_update4(void *opaque, uint64_t now_qemu, int n)
133 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
136 static const int counters[8] = { 0, 0, 0, 0, 4, 4, 6, 6 };
139 if (s->tm4[n].control & (1 << 7))
142 counter = counters[n];
144 if (!s->tm4[counter].freq) {
145 timer_del(s->tm4[n].tm.qtimer);
149 now_vm = s->tm4[counter].clock + muldiv64(now_qemu -
150 s->tm4[counter].lastload,
151 s->tm4[counter].freq, NANOSECONDS_PER_SECOND);
153 new_qemu = now_qemu + muldiv64((uint32_t) (s->tm4[n].tm.value - now_vm),
154 NANOSECONDS_PER_SECOND, s->tm4[counter].freq);
155 timer_mod(s->tm4[n].tm.qtimer, new_qemu);
158 static uint64_t pxa2xx_timer_read(void *opaque, hwaddr offset,
161 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
172 return s->timer[tm].value;
188 if (!pxa2xx_timer_has_tm4(s))
190 return s->tm4[tm].tm.value;
192 return s->clock + muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) -
193 s->lastload, s->freq, NANOSECONDS_PER_SECOND);
209 if (!pxa2xx_timer_has_tm4(s))
212 if ((tm == 9 - 4 || tm == 11 - 4) && (s->tm4[tm].control & (1 << 9))) {
213 if (s->tm4[tm - 1].freq)
214 s->snapshot = s->tm4[tm - 1].clock + muldiv64(
215 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) -
216 s->tm4[tm - 1].lastload,
217 s->tm4[tm - 1].freq, NANOSECONDS_PER_SECOND);
219 s->snapshot = s->tm4[tm - 1].clock;
222 if (!s->tm4[tm].freq)
223 return s->tm4[tm].clock;
224 return s->tm4[tm].clock +
225 muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) -
226 s->tm4[tm].lastload, s->tm4[tm].freq,
227 NANOSECONDS_PER_SECOND);
229 return s->irq_enabled;
230 case OSSR: /* Status register */
249 if (!pxa2xx_timer_has_tm4(s))
251 return s->tm4[tm].control;
256 hw_error("pxa2xx_timer_read: Bad offset " REG_FMT "\n", offset);
262 static void pxa2xx_timer_write(void *opaque, hwaddr offset,
263 uint64_t value, unsigned size)
266 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
276 s->timer[tm].value = value;
277 pxa2xx_timer_update(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
294 if (!pxa2xx_timer_has_tm4(s))
296 s->tm4[tm].tm.value = value;
297 pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm);
300 s->oldclock = s->clock;
301 s->lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
303 pxa2xx_timer_update(s, s->lastload);
320 if (!pxa2xx_timer_has_tm4(s))
322 s->tm4[tm].oldclock = s->tm4[tm].clock;
323 s->tm4[tm].lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
324 s->tm4[tm].clock = value;
325 pxa2xx_timer_update4(s, s->tm4[tm].lastload, tm);
328 s->irq_enabled = value & 0xfff;
330 case OSSR: /* Status register */
333 for (i = 0; i < 4; i ++, value >>= 1)
335 qemu_irq_lower(s->timer[i].irq);
336 if (pxa2xx_timer_has_tm4(s) && !(s->events & 0xff0) && value)
337 qemu_irq_lower(s->irq4);
339 case OWER: /* XXX: Reset on OSMR3 match? */
349 if (!pxa2xx_timer_has_tm4(s))
351 s->tm4[tm].control = value & 0x0ff;
352 /* XXX Stop if running (shouldn't happen) */
353 if ((value & (1 << 7)) || tm == 0)
354 s->tm4[tm].freq = pxa2xx_timer4_freq[value & 7];
357 pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm);
367 if (!pxa2xx_timer_has_tm4(s))
369 s->tm4[tm].control = value & 0x3ff;
370 /* XXX Stop if running (shouldn't happen) */
371 if ((value & (1 << 7)) || !(tm & 1))
373 pxa2xx_timer4_freq[(value & (1 << 8)) ? 0 : (value & 7)];
376 pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm);
381 hw_error("pxa2xx_timer_write: Bad offset " REG_FMT "\n", offset);
385 static const MemoryRegionOps pxa2xx_timer_ops = {
386 .read = pxa2xx_timer_read,
387 .write = pxa2xx_timer_write,
388 .endianness = DEVICE_NATIVE_ENDIAN,
391 static void pxa2xx_timer_tick(void *opaque)
393 PXA2xxTimer0 *t = (PXA2xxTimer0 *) opaque;
394 PXA2xxTimerInfo *i = t->info;
396 if (i->irq_enabled & (1 << t->num)) {
397 i->events |= 1 << t->num;
398 qemu_irq_raise(t->irq);
404 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
408 static void pxa2xx_timer_tick4(void *opaque)
410 PXA2xxTimer4 *t = (PXA2xxTimer4 *) opaque;
411 PXA2xxTimerInfo *i = (PXA2xxTimerInfo *) t->tm.info;
413 pxa2xx_timer_tick(&t->tm);
414 if (t->control & (1 << 3))
416 if (t->control & (1 << 6))
417 pxa2xx_timer_update4(i, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), t->tm.num - 4);
418 if (i->events & 0xff0)
419 qemu_irq_raise(i->irq4);
422 static int pxa25x_timer_post_load(void *opaque, int version_id)
424 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
428 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
429 pxa2xx_timer_update(s, now);
431 if (pxa2xx_timer_has_tm4(s))
432 for (i = 0; i < 8; i ++)
433 pxa2xx_timer_update4(s, now, i);
438 static void pxa2xx_timer_init(Object *obj)
440 PXA2xxTimerInfo *s = PXA2XX_TIMER(obj);
441 SysBusDevice *dev = SYS_BUS_DEVICE(obj);
446 s->lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
449 memory_region_init_io(&s->iomem, obj, &pxa2xx_timer_ops, s,
450 "pxa2xx-timer", 0x00001000);
451 sysbus_init_mmio(dev, &s->iomem);
454 static void pxa2xx_timer_realize(DeviceState *dev, Error **errp)
456 PXA2xxTimerInfo *s = PXA2XX_TIMER(dev);
457 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
460 for (i = 0; i < 4; i ++) {
461 s->timer[i].value = 0;
462 sysbus_init_irq(sbd, &s->timer[i].irq);
463 s->timer[i].info = s;
465 s->timer[i].qtimer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
466 pxa2xx_timer_tick, &s->timer[i]);
469 if (s->flags & (1 << PXA2XX_TIMER_HAVE_TM4)) {
470 sysbus_init_irq(sbd, &s->irq4);
472 for (i = 0; i < 8; i ++) {
473 s->tm4[i].tm.value = 0;
474 s->tm4[i].tm.info = s;
475 s->tm4[i].tm.num = i + 4;
477 s->tm4[i].control = 0x0;
478 s->tm4[i].tm.qtimer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
479 pxa2xx_timer_tick4, &s->tm4[i]);
484 static const VMStateDescription vmstate_pxa2xx_timer0_regs = {
485 .name = "pxa2xx_timer0",
487 .minimum_version_id = 2,
488 .fields = (VMStateField[]) {
489 VMSTATE_UINT32(value, PXA2xxTimer0),
490 VMSTATE_END_OF_LIST(),
494 static const VMStateDescription vmstate_pxa2xx_timer4_regs = {
495 .name = "pxa2xx_timer4",
497 .minimum_version_id = 1,
498 .fields = (VMStateField[]) {
499 VMSTATE_STRUCT(tm, PXA2xxTimer4, 1,
500 vmstate_pxa2xx_timer0_regs, PXA2xxTimer0),
501 VMSTATE_INT32(oldclock, PXA2xxTimer4),
502 VMSTATE_INT32(clock, PXA2xxTimer4),
503 VMSTATE_UINT64(lastload, PXA2xxTimer4),
504 VMSTATE_UINT32(freq, PXA2xxTimer4),
505 VMSTATE_UINT32(control, PXA2xxTimer4),
506 VMSTATE_END_OF_LIST(),
510 static bool pxa2xx_timer_has_tm4_test(void *opaque, int version_id)
512 return pxa2xx_timer_has_tm4(opaque);
515 static const VMStateDescription vmstate_pxa2xx_timer_regs = {
516 .name = "pxa2xx_timer",
518 .minimum_version_id = 1,
519 .post_load = pxa25x_timer_post_load,
520 .fields = (VMStateField[]) {
521 VMSTATE_INT32(clock, PXA2xxTimerInfo),
522 VMSTATE_INT32(oldclock, PXA2xxTimerInfo),
523 VMSTATE_UINT64(lastload, PXA2xxTimerInfo),
524 VMSTATE_STRUCT_ARRAY(timer, PXA2xxTimerInfo, 4, 1,
525 vmstate_pxa2xx_timer0_regs, PXA2xxTimer0),
526 VMSTATE_UINT32(events, PXA2xxTimerInfo),
527 VMSTATE_UINT32(irq_enabled, PXA2xxTimerInfo),
528 VMSTATE_UINT32(reset3, PXA2xxTimerInfo),
529 VMSTATE_UINT32(snapshot, PXA2xxTimerInfo),
530 VMSTATE_STRUCT_ARRAY_TEST(tm4, PXA2xxTimerInfo, 8,
531 pxa2xx_timer_has_tm4_test, 0,
532 vmstate_pxa2xx_timer4_regs, PXA2xxTimer4),
533 VMSTATE_END_OF_LIST(),
537 static Property pxa25x_timer_dev_properties[] = {
538 DEFINE_PROP_UINT32("freq", PXA2xxTimerInfo, freq, PXA25X_FREQ),
539 DEFINE_PROP_BIT("tm4", PXA2xxTimerInfo, flags,
540 PXA2XX_TIMER_HAVE_TM4, false),
541 DEFINE_PROP_END_OF_LIST(),
544 static void pxa25x_timer_dev_class_init(ObjectClass *klass, void *data)
546 DeviceClass *dc = DEVICE_CLASS(klass);
548 dc->desc = "PXA25x timer";
549 dc->props = pxa25x_timer_dev_properties;
552 static const TypeInfo pxa25x_timer_dev_info = {
553 .name = "pxa25x-timer",
554 .parent = TYPE_PXA2XX_TIMER,
555 .instance_size = sizeof(PXA2xxTimerInfo),
556 .class_init = pxa25x_timer_dev_class_init,
559 static Property pxa27x_timer_dev_properties[] = {
560 DEFINE_PROP_UINT32("freq", PXA2xxTimerInfo, freq, PXA27X_FREQ),
561 DEFINE_PROP_BIT("tm4", PXA2xxTimerInfo, flags,
562 PXA2XX_TIMER_HAVE_TM4, true),
563 DEFINE_PROP_END_OF_LIST(),
566 static void pxa27x_timer_dev_class_init(ObjectClass *klass, void *data)
568 DeviceClass *dc = DEVICE_CLASS(klass);
570 dc->desc = "PXA27x timer";
571 dc->props = pxa27x_timer_dev_properties;
574 static const TypeInfo pxa27x_timer_dev_info = {
575 .name = "pxa27x-timer",
576 .parent = TYPE_PXA2XX_TIMER,
577 .instance_size = sizeof(PXA2xxTimerInfo),
578 .class_init = pxa27x_timer_dev_class_init,
581 static void pxa2xx_timer_class_init(ObjectClass *oc, void *data)
583 DeviceClass *dc = DEVICE_CLASS(oc);
585 dc->realize = pxa2xx_timer_realize;
586 dc->vmsd = &vmstate_pxa2xx_timer_regs;
589 static const TypeInfo pxa2xx_timer_type_info = {
590 .name = TYPE_PXA2XX_TIMER,
591 .parent = TYPE_SYS_BUS_DEVICE,
592 .instance_size = sizeof(PXA2xxTimerInfo),
593 .instance_init = pxa2xx_timer_init,
595 .class_init = pxa2xx_timer_class_init,
598 static void pxa2xx_timer_register_types(void)
600 type_register_static(&pxa2xx_timer_type_info);
601 type_register_static(&pxa25x_timer_dev_info);
602 type_register_static(&pxa27x_timer_dev_info);
605 type_init(pxa2xx_timer_register_types)