2 * Intel XScale PXA255/270 OS Timers.
4 * Copyright (c) 2006 Openedhand Ltd.
5 * Copyright (c) 2006 Thorsten Zitterell
7 * This code is licenced under the GPL.
11 #include "qemu-timer.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. */
86 PXA2xxTimer0 timer[4];
94 static void pxa2xx_timer_update(void *opaque, uint64_t now_qemu)
96 pxa2xx_timer_info *s = (pxa2xx_timer_info *) opaque;
102 muldiv64(now_qemu - s->lastload, s->freq, get_ticks_per_sec());
104 for (i = 0; i < 4; i ++) {
105 new_qemu = now_qemu + muldiv64((uint32_t) (s->timer[i].value - now_vm),
106 get_ticks_per_sec(), s->freq);
107 qemu_mod_timer(s->timer[i].qtimer, new_qemu);
111 static void pxa2xx_timer_update4(void *opaque, uint64_t now_qemu, int n)
113 pxa2xx_timer_info *s = (pxa2xx_timer_info *) opaque;
116 static const int counters[8] = { 0, 0, 0, 0, 4, 4, 6, 6 };
119 if (s->tm4[n].control & (1 << 7))
122 counter = counters[n];
124 if (!s->tm4[counter].freq) {
125 qemu_del_timer(s->tm4[n].tm.qtimer);
129 now_vm = s->tm4[counter].clock + muldiv64(now_qemu -
130 s->tm4[counter].lastload,
131 s->tm4[counter].freq, get_ticks_per_sec());
133 new_qemu = now_qemu + muldiv64((uint32_t) (s->tm4[n].tm.value - now_vm),
134 get_ticks_per_sec(), s->tm4[counter].freq);
135 qemu_mod_timer(s->tm4[n].tm.qtimer, new_qemu);
138 static uint32_t pxa2xx_timer_read(void *opaque, target_phys_addr_t offset)
140 pxa2xx_timer_info *s = (pxa2xx_timer_info *) opaque;
148 return s->timer[tm].value;
159 return s->tm4[tm].tm.value;
161 return s->clock + muldiv64(qemu_get_clock(vm_clock) -
162 s->lastload, s->freq, get_ticks_per_sec());
174 if ((tm == 9 - 4 || tm == 11 - 4) && (s->tm4[tm].control & (1 << 9))) {
175 if (s->tm4[tm - 1].freq)
176 s->snapshot = s->tm4[tm - 1].clock + muldiv64(
177 qemu_get_clock(vm_clock) -
178 s->tm4[tm - 1].lastload,
179 s->tm4[tm - 1].freq, get_ticks_per_sec());
181 s->snapshot = s->tm4[tm - 1].clock;
184 if (!s->tm4[tm].freq)
185 return s->tm4[tm].clock;
186 return s->tm4[tm].clock + muldiv64(qemu_get_clock(vm_clock) -
187 s->tm4[tm].lastload, s->tm4[tm].freq, get_ticks_per_sec());
189 return s->irq_enabled;
190 case OSSR: /* Status register */
204 return s->tm4[tm].control;
209 hw_error("pxa2xx_timer_read: Bad offset " REG_FMT "\n", offset);
215 static void pxa2xx_timer_write(void *opaque, target_phys_addr_t offset,
219 pxa2xx_timer_info *s = (pxa2xx_timer_info *) opaque;
226 s->timer[tm].value = value;
227 pxa2xx_timer_update(s, qemu_get_clock(vm_clock));
239 s->tm4[tm].tm.value = value;
240 pxa2xx_timer_update4(s, qemu_get_clock(vm_clock), tm);
243 s->oldclock = s->clock;
244 s->lastload = qemu_get_clock(vm_clock);
246 pxa2xx_timer_update(s, s->lastload);
258 s->tm4[tm].oldclock = s->tm4[tm].clock;
259 s->tm4[tm].lastload = qemu_get_clock(vm_clock);
260 s->tm4[tm].clock = value;
261 pxa2xx_timer_update4(s, s->tm4[tm].lastload, tm);
264 s->irq_enabled = value & 0xfff;
266 case OSSR: /* Status register */
268 for (i = 0; i < 4; i ++, value >>= 1) {
269 if (s->timer[i].level && (value & 1)) {
270 s->timer[i].level = 0;
271 qemu_irq_lower(s->timer[i].irq);
275 for (i = 0; i < 8; i ++, value >>= 1)
276 if (s->tm4[i].tm.level && (value & 1))
277 s->tm4[i].tm.level = 0;
278 if (!(s->events & 0xff0))
279 qemu_irq_lower(s->tm4->tm.irq);
282 case OWER: /* XXX: Reset on OSMR3 match? */
291 s->tm4[tm].control = value & 0x0ff;
292 /* XXX Stop if running (shouldn't happen) */
293 if ((value & (1 << 7)) || tm == 0)
294 s->tm4[tm].freq = pxa2xx_timer4_freq[value & 7];
297 pxa2xx_timer_update4(s, qemu_get_clock(vm_clock), tm);
306 s->tm4[tm].control = value & 0x3ff;
307 /* XXX Stop if running (shouldn't happen) */
308 if ((value & (1 << 7)) || !(tm & 1))
310 pxa2xx_timer4_freq[(value & (1 << 8)) ? 0 : (value & 7)];
313 pxa2xx_timer_update4(s, qemu_get_clock(vm_clock), tm);
318 hw_error("pxa2xx_timer_write: Bad offset " REG_FMT "\n", offset);
322 static CPUReadMemoryFunc * const pxa2xx_timer_readfn[] = {
328 static CPUWriteMemoryFunc * const pxa2xx_timer_writefn[] = {
334 static void pxa2xx_timer_tick(void *opaque)
336 PXA2xxTimer0 *t = (PXA2xxTimer0 *) opaque;
337 pxa2xx_timer_info *i = (pxa2xx_timer_info *) t->info;
339 if (i->irq_enabled & (1 << t->num)) {
341 i->events |= 1 << t->num;
342 qemu_irq_raise(t->irq);
348 qemu_system_reset_request();
352 static void pxa2xx_timer_tick4(void *opaque)
354 PXA2xxTimer4 *t = (PXA2xxTimer4 *) opaque;
355 pxa2xx_timer_info *i = (pxa2xx_timer_info *) t->tm.info;
357 pxa2xx_timer_tick(&t->tm);
358 if (t->control & (1 << 3))
360 if (t->control & (1 << 6))
361 pxa2xx_timer_update4(i, qemu_get_clock(vm_clock), t->tm.num - 4);
364 static void pxa2xx_timer_save(QEMUFile *f, void *opaque)
366 pxa2xx_timer_info *s = (pxa2xx_timer_info *) opaque;
369 qemu_put_be32s(f, (uint32_t *) &s->clock);
370 qemu_put_be32s(f, (uint32_t *) &s->oldclock);
371 qemu_put_be64s(f, &s->lastload);
373 for (i = 0; i < 4; i ++) {
374 qemu_put_be32s(f, &s->timer[i].value);
375 qemu_put_be32(f, s->timer[i].level);
378 for (i = 0; i < 8; i ++) {
379 qemu_put_be32s(f, &s->tm4[i].tm.value);
380 qemu_put_be32(f, s->tm4[i].tm.level);
381 qemu_put_sbe32s(f, &s->tm4[i].oldclock);
382 qemu_put_sbe32s(f, &s->tm4[i].clock);
383 qemu_put_be64s(f, &s->tm4[i].lastload);
384 qemu_put_be32s(f, &s->tm4[i].freq);
385 qemu_put_be32s(f, &s->tm4[i].control);
388 qemu_put_be32s(f, &s->events);
389 qemu_put_be32s(f, &s->irq_enabled);
390 qemu_put_be32s(f, &s->reset3);
391 qemu_put_be32s(f, &s->snapshot);
394 static int pxa2xx_timer_load(QEMUFile *f, void *opaque, int version_id)
396 pxa2xx_timer_info *s = (pxa2xx_timer_info *) opaque;
400 qemu_get_be32s(f, (uint32_t *) &s->clock);
401 qemu_get_be32s(f, (uint32_t *) &s->oldclock);
402 qemu_get_be64s(f, &s->lastload);
404 now = qemu_get_clock(vm_clock);
405 for (i = 0; i < 4; i ++) {
406 qemu_get_be32s(f, &s->timer[i].value);
407 s->timer[i].level = qemu_get_be32(f);
409 pxa2xx_timer_update(s, now);
412 for (i = 0; i < 8; i ++) {
413 qemu_get_be32s(f, &s->tm4[i].tm.value);
414 s->tm4[i].tm.level = qemu_get_be32(f);
415 qemu_get_sbe32s(f, &s->tm4[i].oldclock);
416 qemu_get_sbe32s(f, &s->tm4[i].clock);
417 qemu_get_be64s(f, &s->tm4[i].lastload);
418 qemu_get_be32s(f, &s->tm4[i].freq);
419 qemu_get_be32s(f, &s->tm4[i].control);
420 pxa2xx_timer_update4(s, now, i);
423 qemu_get_be32s(f, &s->events);
424 qemu_get_be32s(f, &s->irq_enabled);
425 qemu_get_be32s(f, &s->reset3);
426 qemu_get_be32s(f, &s->snapshot);
431 static pxa2xx_timer_info *pxa2xx_timer_init(target_phys_addr_t base,
436 pxa2xx_timer_info *s;
438 s = (pxa2xx_timer_info *) qemu_mallocz(sizeof(pxa2xx_timer_info));
442 s->lastload = qemu_get_clock(vm_clock);
445 for (i = 0; i < 4; i ++) {
446 s->timer[i].value = 0;
447 s->timer[i].irq = qdev_get_gpio_in(pic, PXA2XX_PIC_OST_0 + i);
448 s->timer[i].info = s;
450 s->timer[i].level = 0;
451 s->timer[i].qtimer = qemu_new_timer(vm_clock,
452 pxa2xx_timer_tick, &s->timer[i]);
455 iomemtype = cpu_register_io_memory(pxa2xx_timer_readfn,
456 pxa2xx_timer_writefn, s, DEVICE_NATIVE_ENDIAN);
457 cpu_register_physical_memory(base, 0x00001000, iomemtype);
459 register_savevm(NULL, "pxa2xx_timer", 0, 0,
460 pxa2xx_timer_save, pxa2xx_timer_load, s);
465 void pxa25x_timer_init(target_phys_addr_t base, DeviceState *pic)
467 pxa2xx_timer_info *s = pxa2xx_timer_init(base, pic);
468 s->freq = PXA25X_FREQ;
472 void pxa27x_timer_init(target_phys_addr_t base, DeviceState *pic)
474 pxa2xx_timer_info *s = pxa2xx_timer_init(base, pic);
476 s->freq = PXA27X_FREQ;
477 s->tm4 = (PXA2xxTimer4 *) qemu_mallocz(8 *
478 sizeof(PXA2xxTimer4));
479 for (i = 0; i < 8; i ++) {
480 s->tm4[i].tm.value = 0;
481 s->tm4[i].tm.irq = qdev_get_gpio_in(pic, PXA27X_PIC_OST_4_11);
482 s->tm4[i].tm.info = s;
483 s->tm4[i].tm.num = i + 4;
484 s->tm4[i].tm.level = 0;
486 s->tm4[i].control = 0x0;
487 s->tm4[i].tm.qtimer = qemu_new_timer(vm_clock,
488 pxa2xx_timer_tick4, &s->tm4[i]);