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.
11 #include "qemu/timer.h"
12 #include "sysemu/sysemu.h"
13 #include "hw/arm/pxa.h"
14 #include "hw/sysbus.h"
28 #define OSCR 0x10 /* OS Timer Count */
37 #define OSSR 0x14 /* Timer status register */
39 #define OIER 0x1c /* Interrupt enable register 3-0 to E3-E0 */
40 #define OMCR4 0xc0 /* OS Match Control registers */
50 #define PXA25X_FREQ 3686400 /* 3.6864 MHz */
51 #define PXA27X_FREQ 3250000 /* 3.25 MHz */
53 static int pxa2xx_timer4_freq[8] = {
59 /* [5] is the "Externally supplied clock". Assign if necessary. */
63 #define TYPE_PXA2XX_TIMER "pxa2xx-timer"
64 #define PXA2XX_TIMER(obj) \
65 OBJECT_CHECK(PXA2xxTimerInfo, (obj), TYPE_PXA2XX_TIMER)
67 typedef struct PXA2xxTimerInfo PXA2xxTimerInfo;
74 PXA2xxTimerInfo *info;
86 struct PXA2xxTimerInfo {
87 SysBusDevice parent_obj;
96 PXA2xxTimer0 timer[4];
106 #define PXA2XX_TIMER_HAVE_TM4 0
108 static inline int pxa2xx_timer_has_tm4(PXA2xxTimerInfo *s)
110 return s->flags & (1 << PXA2XX_TIMER_HAVE_TM4);
113 static void pxa2xx_timer_update(void *opaque, uint64_t now_qemu)
115 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
121 muldiv64(now_qemu - s->lastload, s->freq, get_ticks_per_sec());
123 for (i = 0; i < 4; i ++) {
124 new_qemu = now_qemu + muldiv64((uint32_t) (s->timer[i].value - now_vm),
125 get_ticks_per_sec(), s->freq);
126 timer_mod(s->timer[i].qtimer, new_qemu);
130 static void pxa2xx_timer_update4(void *opaque, uint64_t now_qemu, int n)
132 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
135 static const int counters[8] = { 0, 0, 0, 0, 4, 4, 6, 6 };
138 if (s->tm4[n].control & (1 << 7))
141 counter = counters[n];
143 if (!s->tm4[counter].freq) {
144 timer_del(s->tm4[n].tm.qtimer);
148 now_vm = s->tm4[counter].clock + muldiv64(now_qemu -
149 s->tm4[counter].lastload,
150 s->tm4[counter].freq, get_ticks_per_sec());
152 new_qemu = now_qemu + muldiv64((uint32_t) (s->tm4[n].tm.value - now_vm),
153 get_ticks_per_sec(), s->tm4[counter].freq);
154 timer_mod(s->tm4[n].tm.qtimer, new_qemu);
157 static uint64_t pxa2xx_timer_read(void *opaque, hwaddr offset,
160 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
171 return s->timer[tm].value;
187 if (!pxa2xx_timer_has_tm4(s))
189 return s->tm4[tm].tm.value;
191 return s->clock + muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) -
192 s->lastload, s->freq, get_ticks_per_sec());
208 if (!pxa2xx_timer_has_tm4(s))
211 if ((tm == 9 - 4 || tm == 11 - 4) && (s->tm4[tm].control & (1 << 9))) {
212 if (s->tm4[tm - 1].freq)
213 s->snapshot = s->tm4[tm - 1].clock + muldiv64(
214 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) -
215 s->tm4[tm - 1].lastload,
216 s->tm4[tm - 1].freq, get_ticks_per_sec());
218 s->snapshot = s->tm4[tm - 1].clock;
221 if (!s->tm4[tm].freq)
222 return s->tm4[tm].clock;
223 return s->tm4[tm].clock + muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) -
224 s->tm4[tm].lastload, s->tm4[tm].freq, get_ticks_per_sec());
226 return s->irq_enabled;
227 case OSSR: /* Status register */
246 if (!pxa2xx_timer_has_tm4(s))
248 return s->tm4[tm].control;
253 hw_error("pxa2xx_timer_read: Bad offset " REG_FMT "\n", offset);
259 static void pxa2xx_timer_write(void *opaque, hwaddr offset,
260 uint64_t value, unsigned size)
263 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
273 s->timer[tm].value = value;
274 pxa2xx_timer_update(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
291 if (!pxa2xx_timer_has_tm4(s))
293 s->tm4[tm].tm.value = value;
294 pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm);
297 s->oldclock = s->clock;
298 s->lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
300 pxa2xx_timer_update(s, s->lastload);
317 if (!pxa2xx_timer_has_tm4(s))
319 s->tm4[tm].oldclock = s->tm4[tm].clock;
320 s->tm4[tm].lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
321 s->tm4[tm].clock = value;
322 pxa2xx_timer_update4(s, s->tm4[tm].lastload, tm);
325 s->irq_enabled = value & 0xfff;
327 case OSSR: /* Status register */
330 for (i = 0; i < 4; i ++, value >>= 1)
332 qemu_irq_lower(s->timer[i].irq);
333 if (pxa2xx_timer_has_tm4(s) && !(s->events & 0xff0) && value)
334 qemu_irq_lower(s->irq4);
336 case OWER: /* XXX: Reset on OSMR3 match? */
346 if (!pxa2xx_timer_has_tm4(s))
348 s->tm4[tm].control = value & 0x0ff;
349 /* XXX Stop if running (shouldn't happen) */
350 if ((value & (1 << 7)) || tm == 0)
351 s->tm4[tm].freq = pxa2xx_timer4_freq[value & 7];
354 pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm);
364 if (!pxa2xx_timer_has_tm4(s))
366 s->tm4[tm].control = value & 0x3ff;
367 /* XXX Stop if running (shouldn't happen) */
368 if ((value & (1 << 7)) || !(tm & 1))
370 pxa2xx_timer4_freq[(value & (1 << 8)) ? 0 : (value & 7)];
373 pxa2xx_timer_update4(s, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tm);
378 hw_error("pxa2xx_timer_write: Bad offset " REG_FMT "\n", offset);
382 static const MemoryRegionOps pxa2xx_timer_ops = {
383 .read = pxa2xx_timer_read,
384 .write = pxa2xx_timer_write,
385 .endianness = DEVICE_NATIVE_ENDIAN,
388 static void pxa2xx_timer_tick(void *opaque)
390 PXA2xxTimer0 *t = (PXA2xxTimer0 *) opaque;
391 PXA2xxTimerInfo *i = t->info;
393 if (i->irq_enabled & (1 << t->num)) {
394 i->events |= 1 << t->num;
395 qemu_irq_raise(t->irq);
401 qemu_system_reset_request();
405 static void pxa2xx_timer_tick4(void *opaque)
407 PXA2xxTimer4 *t = (PXA2xxTimer4 *) opaque;
408 PXA2xxTimerInfo *i = (PXA2xxTimerInfo *) t->tm.info;
410 pxa2xx_timer_tick(&t->tm);
411 if (t->control & (1 << 3))
413 if (t->control & (1 << 6))
414 pxa2xx_timer_update4(i, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), t->tm.num - 4);
415 if (i->events & 0xff0)
416 qemu_irq_raise(i->irq4);
419 static int pxa25x_timer_post_load(void *opaque, int version_id)
421 PXA2xxTimerInfo *s = (PXA2xxTimerInfo *) opaque;
425 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
426 pxa2xx_timer_update(s, now);
428 if (pxa2xx_timer_has_tm4(s))
429 for (i = 0; i < 8; i ++)
430 pxa2xx_timer_update4(s, now, i);
435 static int pxa2xx_timer_init(SysBusDevice *dev)
437 PXA2xxTimerInfo *s = PXA2XX_TIMER(dev);
443 s->lastload = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
446 for (i = 0; i < 4; i ++) {
447 s->timer[i].value = 0;
448 sysbus_init_irq(dev, &s->timer[i].irq);
449 s->timer[i].info = s;
451 s->timer[i].qtimer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
452 pxa2xx_timer_tick, &s->timer[i]);
454 if (s->flags & (1 << PXA2XX_TIMER_HAVE_TM4)) {
455 sysbus_init_irq(dev, &s->irq4);
457 for (i = 0; i < 8; i ++) {
458 s->tm4[i].tm.value = 0;
459 s->tm4[i].tm.info = s;
460 s->tm4[i].tm.num = i + 4;
462 s->tm4[i].control = 0x0;
463 s->tm4[i].tm.qtimer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
464 pxa2xx_timer_tick4, &s->tm4[i]);
468 memory_region_init_io(&s->iomem, OBJECT(s), &pxa2xx_timer_ops, s,
469 "pxa2xx-timer", 0x00001000);
470 sysbus_init_mmio(dev, &s->iomem);
475 static const VMStateDescription vmstate_pxa2xx_timer0_regs = {
476 .name = "pxa2xx_timer0",
478 .minimum_version_id = 2,
479 .fields = (VMStateField[]) {
480 VMSTATE_UINT32(value, PXA2xxTimer0),
481 VMSTATE_END_OF_LIST(),
485 static const VMStateDescription vmstate_pxa2xx_timer4_regs = {
486 .name = "pxa2xx_timer4",
488 .minimum_version_id = 1,
489 .fields = (VMStateField[]) {
490 VMSTATE_STRUCT(tm, PXA2xxTimer4, 1,
491 vmstate_pxa2xx_timer0_regs, PXA2xxTimer0),
492 VMSTATE_INT32(oldclock, PXA2xxTimer4),
493 VMSTATE_INT32(clock, PXA2xxTimer4),
494 VMSTATE_UINT64(lastload, PXA2xxTimer4),
495 VMSTATE_UINT32(freq, PXA2xxTimer4),
496 VMSTATE_UINT32(control, PXA2xxTimer4),
497 VMSTATE_END_OF_LIST(),
501 static bool pxa2xx_timer_has_tm4_test(void *opaque, int version_id)
503 return pxa2xx_timer_has_tm4(opaque);
506 static const VMStateDescription vmstate_pxa2xx_timer_regs = {
507 .name = "pxa2xx_timer",
509 .minimum_version_id = 1,
510 .post_load = pxa25x_timer_post_load,
511 .fields = (VMStateField[]) {
512 VMSTATE_INT32(clock, PXA2xxTimerInfo),
513 VMSTATE_INT32(oldclock, PXA2xxTimerInfo),
514 VMSTATE_UINT64(lastload, PXA2xxTimerInfo),
515 VMSTATE_STRUCT_ARRAY(timer, PXA2xxTimerInfo, 4, 1,
516 vmstate_pxa2xx_timer0_regs, PXA2xxTimer0),
517 VMSTATE_UINT32(events, PXA2xxTimerInfo),
518 VMSTATE_UINT32(irq_enabled, PXA2xxTimerInfo),
519 VMSTATE_UINT32(reset3, PXA2xxTimerInfo),
520 VMSTATE_UINT32(snapshot, PXA2xxTimerInfo),
521 VMSTATE_STRUCT_ARRAY_TEST(tm4, PXA2xxTimerInfo, 8,
522 pxa2xx_timer_has_tm4_test, 0,
523 vmstate_pxa2xx_timer4_regs, PXA2xxTimer4),
524 VMSTATE_END_OF_LIST(),
528 static Property pxa25x_timer_dev_properties[] = {
529 DEFINE_PROP_UINT32("freq", PXA2xxTimerInfo, freq, PXA25X_FREQ),
530 DEFINE_PROP_BIT("tm4", PXA2xxTimerInfo, flags,
531 PXA2XX_TIMER_HAVE_TM4, false),
532 DEFINE_PROP_END_OF_LIST(),
535 static void pxa25x_timer_dev_class_init(ObjectClass *klass, void *data)
537 DeviceClass *dc = DEVICE_CLASS(klass);
539 dc->desc = "PXA25x timer";
540 dc->props = pxa25x_timer_dev_properties;
543 static const TypeInfo pxa25x_timer_dev_info = {
544 .name = "pxa25x-timer",
545 .parent = TYPE_PXA2XX_TIMER,
546 .instance_size = sizeof(PXA2xxTimerInfo),
547 .class_init = pxa25x_timer_dev_class_init,
550 static Property pxa27x_timer_dev_properties[] = {
551 DEFINE_PROP_UINT32("freq", PXA2xxTimerInfo, freq, PXA27X_FREQ),
552 DEFINE_PROP_BIT("tm4", PXA2xxTimerInfo, flags,
553 PXA2XX_TIMER_HAVE_TM4, true),
554 DEFINE_PROP_END_OF_LIST(),
557 static void pxa27x_timer_dev_class_init(ObjectClass *klass, void *data)
559 DeviceClass *dc = DEVICE_CLASS(klass);
561 dc->desc = "PXA27x timer";
562 dc->props = pxa27x_timer_dev_properties;
565 static const TypeInfo pxa27x_timer_dev_info = {
566 .name = "pxa27x-timer",
567 .parent = TYPE_PXA2XX_TIMER,
568 .instance_size = sizeof(PXA2xxTimerInfo),
569 .class_init = pxa27x_timer_dev_class_init,
572 static void pxa2xx_timer_class_init(ObjectClass *oc, void *data)
574 DeviceClass *dc = DEVICE_CLASS(oc);
575 SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(oc);
577 sdc->init = pxa2xx_timer_init;
578 dc->vmsd = &vmstate_pxa2xx_timer_regs;
581 static const TypeInfo pxa2xx_timer_type_info = {
582 .name = TYPE_PXA2XX_TIMER,
583 .parent = TYPE_SYS_BUS_DEVICE,
584 .instance_size = sizeof(PXA2xxTimerInfo),
586 .class_init = pxa2xx_timer_class_init,
589 static void pxa2xx_timer_register_types(void)
591 type_register_static(&pxa2xx_timer_type_info);
592 type_register_static(&pxa25x_timer_dev_info);
593 type_register_static(&pxa27x_timer_dev_info);
596 type_init(pxa2xx_timer_register_types)