2 * QEMU generic PowerPC hardware System Emulator
4 * Copyright (c) 2003-2007 Jocelyn Mayer
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #include "qemu-timer.h"
31 //#define PPC_DEBUG_IRQ
32 //#define PPC_DEBUG_TB
35 # define LOG_IRQ(...) do { \
36 if (loglevel & CPU_LOG_INT) \
37 fprintf(logfile, ## __VA_ARGS__); \
40 # define LOG_IRQ(...) do { } while (0)
45 # define LOG_TB(...) do { \
47 fprintf(logfile, ## __VA_ARGS__); \
50 # define LOG_TB(...) do { } while (0)
53 static void cpu_ppc_tb_stop (CPUState *env);
54 static void cpu_ppc_tb_start (CPUState *env);
56 static void ppc_set_irq (CPUState *env, int n_IRQ, int level)
59 env->pending_interrupts |= 1 << n_IRQ;
60 cpu_interrupt(env, CPU_INTERRUPT_HARD);
62 env->pending_interrupts &= ~(1 << n_IRQ);
63 if (env->pending_interrupts == 0)
64 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
66 LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32
67 "req %08x\n", __func__, env, n_IRQ, level,
68 env->pending_interrupts, env->interrupt_request);
71 /* PowerPC 6xx / 7xx internal IRQ controller */
72 static void ppc6xx_set_irq (void *opaque, int pin, int level)
74 CPUState *env = opaque;
77 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
79 cur_level = (env->irq_input_state >> pin) & 1;
80 /* Don't generate spurious events */
81 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
83 case PPC6xx_INPUT_TBEN:
84 /* Level sensitive - active high */
85 LOG_IRQ("%s: %s the time base\n",
86 __func__, level ? "start" : "stop");
88 cpu_ppc_tb_start(env);
92 case PPC6xx_INPUT_INT:
93 /* Level sensitive - active high */
94 LOG_IRQ("%s: set the external IRQ state to %d\n",
96 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
98 case PPC6xx_INPUT_SMI:
99 /* Level sensitive - active high */
100 LOG_IRQ("%s: set the SMI IRQ state to %d\n",
102 ppc_set_irq(env, PPC_INTERRUPT_SMI, level);
104 case PPC6xx_INPUT_MCP:
105 /* Negative edge sensitive */
106 /* XXX: TODO: actual reaction may depends on HID0 status
107 * 603/604/740/750: check HID0[EMCP]
109 if (cur_level == 1 && level == 0) {
110 LOG_IRQ("%s: raise machine check state\n",
112 ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
115 case PPC6xx_INPUT_CKSTP_IN:
116 /* Level sensitive - active low */
117 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
118 /* XXX: Note that the only way to restart the CPU is to reset it */
120 LOG_IRQ("%s: stop the CPU\n", __func__);
124 case PPC6xx_INPUT_HRESET:
125 /* Level sensitive - active low */
127 LOG_IRQ("%s: reset the CPU\n", __func__);
128 env->interrupt_request |= CPU_INTERRUPT_EXITTB;
133 qemu_system_reset_request();
137 case PPC6xx_INPUT_SRESET:
138 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
140 ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
143 /* Unknown pin - do nothing */
144 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
148 env->irq_input_state |= 1 << pin;
150 env->irq_input_state &= ~(1 << pin);
154 void ppc6xx_irq_init (CPUState *env)
156 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, env,
160 #if defined(TARGET_PPC64)
161 /* PowerPC 970 internal IRQ controller */
162 static void ppc970_set_irq (void *opaque, int pin, int level)
164 CPUState *env = opaque;
167 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
169 cur_level = (env->irq_input_state >> pin) & 1;
170 /* Don't generate spurious events */
171 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
173 case PPC970_INPUT_INT:
174 /* Level sensitive - active high */
175 LOG_IRQ("%s: set the external IRQ state to %d\n",
177 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
179 case PPC970_INPUT_THINT:
180 /* Level sensitive - active high */
181 LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__,
183 ppc_set_irq(env, PPC_INTERRUPT_THERM, level);
185 case PPC970_INPUT_MCP:
186 /* Negative edge sensitive */
187 /* XXX: TODO: actual reaction may depends on HID0 status
188 * 603/604/740/750: check HID0[EMCP]
190 if (cur_level == 1 && level == 0) {
191 LOG_IRQ("%s: raise machine check state\n",
193 ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
196 case PPC970_INPUT_CKSTP:
197 /* Level sensitive - active low */
198 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
200 LOG_IRQ("%s: stop the CPU\n", __func__);
203 LOG_IRQ("%s: restart the CPU\n", __func__);
207 case PPC970_INPUT_HRESET:
208 /* Level sensitive - active low */
211 LOG_IRQ("%s: reset the CPU\n", __func__);
216 case PPC970_INPUT_SRESET:
217 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
219 ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
221 case PPC970_INPUT_TBEN:
222 LOG_IRQ("%s: set the TBEN state to %d\n", __func__,
227 /* Unknown pin - do nothing */
228 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
232 env->irq_input_state |= 1 << pin;
234 env->irq_input_state &= ~(1 << pin);
238 void ppc970_irq_init (CPUState *env)
240 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, env,
243 #endif /* defined(TARGET_PPC64) */
245 /* PowerPC 40x internal IRQ controller */
246 static void ppc40x_set_irq (void *opaque, int pin, int level)
248 CPUState *env = opaque;
251 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
253 cur_level = (env->irq_input_state >> pin) & 1;
254 /* Don't generate spurious events */
255 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
257 case PPC40x_INPUT_RESET_SYS:
259 LOG_IRQ("%s: reset the PowerPC system\n",
261 ppc40x_system_reset(env);
264 case PPC40x_INPUT_RESET_CHIP:
266 LOG_IRQ("%s: reset the PowerPC chip\n", __func__);
267 ppc40x_chip_reset(env);
270 case PPC40x_INPUT_RESET_CORE:
271 /* XXX: TODO: update DBSR[MRR] */
273 LOG_IRQ("%s: reset the PowerPC core\n", __func__);
274 ppc40x_core_reset(env);
277 case PPC40x_INPUT_CINT:
278 /* Level sensitive - active high */
279 LOG_IRQ("%s: set the critical IRQ state to %d\n",
281 ppc_set_irq(env, PPC_INTERRUPT_CEXT, level);
283 case PPC40x_INPUT_INT:
284 /* Level sensitive - active high */
285 LOG_IRQ("%s: set the external IRQ state to %d\n",
287 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
289 case PPC40x_INPUT_HALT:
290 /* Level sensitive - active low */
292 LOG_IRQ("%s: stop the CPU\n", __func__);
295 LOG_IRQ("%s: restart the CPU\n", __func__);
299 case PPC40x_INPUT_DEBUG:
300 /* Level sensitive - active high */
301 LOG_IRQ("%s: set the debug pin state to %d\n",
303 ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level);
306 /* Unknown pin - do nothing */
307 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
311 env->irq_input_state |= 1 << pin;
313 env->irq_input_state &= ~(1 << pin);
317 void ppc40x_irq_init (CPUState *env)
319 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq,
320 env, PPC40x_INPUT_NB);
323 /*****************************************************************************/
324 /* PowerPC time base and decrementer emulation */
326 /* Time base management */
327 int64_t tb_offset; /* Compensation */
328 int64_t atb_offset; /* Compensation */
329 uint32_t tb_freq; /* TB frequency */
330 /* Decrementer management */
331 uint64_t decr_next; /* Tick for next decr interrupt */
332 uint32_t decr_freq; /* decrementer frequency */
333 struct QEMUTimer *decr_timer;
334 /* Hypervisor decrementer management */
335 uint64_t hdecr_next; /* Tick for next hdecr interrupt */
336 struct QEMUTimer *hdecr_timer;
342 static always_inline uint64_t cpu_ppc_get_tb (ppc_tb_t *tb_env, uint64_t vmclk,
345 /* TB time in tb periods */
346 return muldiv64(vmclk, tb_env->tb_freq, ticks_per_sec) + tb_offset;
349 uint32_t cpu_ppc_load_tbl (CPUState *env)
351 ppc_tb_t *tb_env = env->tb_env;
354 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
355 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
357 return tb & 0xFFFFFFFF;
360 static always_inline uint32_t _cpu_ppc_load_tbu (CPUState *env)
362 ppc_tb_t *tb_env = env->tb_env;
365 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
366 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
371 uint32_t cpu_ppc_load_tbu (CPUState *env)
373 return _cpu_ppc_load_tbu(env);
376 static always_inline void cpu_ppc_store_tb (ppc_tb_t *tb_env, uint64_t vmclk,
380 *tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, ticks_per_sec);
381 LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n",
382 __func__, value, *tb_offsetp);
385 void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
387 ppc_tb_t *tb_env = env->tb_env;
390 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
391 tb &= 0xFFFFFFFF00000000ULL;
392 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
393 &tb_env->tb_offset, tb | (uint64_t)value);
396 static always_inline void _cpu_ppc_store_tbu (CPUState *env, uint32_t value)
398 ppc_tb_t *tb_env = env->tb_env;
401 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
402 tb &= 0x00000000FFFFFFFFULL;
403 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
404 &tb_env->tb_offset, ((uint64_t)value << 32) | tb);
407 void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
409 _cpu_ppc_store_tbu(env, value);
412 uint32_t cpu_ppc_load_atbl (CPUState *env)
414 ppc_tb_t *tb_env = env->tb_env;
417 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
418 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
420 return tb & 0xFFFFFFFF;
423 uint32_t cpu_ppc_load_atbu (CPUState *env)
425 ppc_tb_t *tb_env = env->tb_env;
428 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
429 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
434 void cpu_ppc_store_atbl (CPUState *env, uint32_t value)
436 ppc_tb_t *tb_env = env->tb_env;
439 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
440 tb &= 0xFFFFFFFF00000000ULL;
441 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
442 &tb_env->atb_offset, tb | (uint64_t)value);
445 void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
447 ppc_tb_t *tb_env = env->tb_env;
450 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
451 tb &= 0x00000000FFFFFFFFULL;
452 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
453 &tb_env->atb_offset, ((uint64_t)value << 32) | tb);
456 static void cpu_ppc_tb_stop (CPUState *env)
458 ppc_tb_t *tb_env = env->tb_env;
459 uint64_t tb, atb, vmclk;
461 /* If the time base is already frozen, do nothing */
462 if (tb_env->tb_freq != 0) {
463 vmclk = qemu_get_clock(vm_clock);
464 /* Get the time base */
465 tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset);
466 /* Get the alternate time base */
467 atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset);
468 /* Store the time base value (ie compute the current offset) */
469 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
470 /* Store the alternate time base value (compute the current offset) */
471 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
472 /* Set the time base frequency to zero */
474 /* Now, the time bases are frozen to tb_offset / atb_offset value */
478 static void cpu_ppc_tb_start (CPUState *env)
480 ppc_tb_t *tb_env = env->tb_env;
481 uint64_t tb, atb, vmclk;
483 /* If the time base is not frozen, do nothing */
484 if (tb_env->tb_freq == 0) {
485 vmclk = qemu_get_clock(vm_clock);
486 /* Get the time base from tb_offset */
487 tb = tb_env->tb_offset;
488 /* Get the alternate time base from atb_offset */
489 atb = tb_env->atb_offset;
490 /* Restore the tb frequency from the decrementer frequency */
491 tb_env->tb_freq = tb_env->decr_freq;
492 /* Store the time base value */
493 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
494 /* Store the alternate time base value */
495 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
499 static always_inline uint32_t _cpu_ppc_load_decr (CPUState *env,
502 ppc_tb_t *tb_env = env->tb_env;
506 diff = tb_env->decr_next - qemu_get_clock(vm_clock);
508 decr = muldiv64(diff, tb_env->decr_freq, ticks_per_sec);
510 decr = -muldiv64(-diff, tb_env->decr_freq, ticks_per_sec);
511 LOG_TB("%s: %08" PRIx32 "\n", __func__, decr);
516 uint32_t cpu_ppc_load_decr (CPUState *env)
518 ppc_tb_t *tb_env = env->tb_env;
520 return _cpu_ppc_load_decr(env, &tb_env->decr_next);
523 uint32_t cpu_ppc_load_hdecr (CPUState *env)
525 ppc_tb_t *tb_env = env->tb_env;
527 return _cpu_ppc_load_decr(env, &tb_env->hdecr_next);
530 uint64_t cpu_ppc_load_purr (CPUState *env)
532 ppc_tb_t *tb_env = env->tb_env;
535 diff = qemu_get_clock(vm_clock) - tb_env->purr_start;
537 return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, ticks_per_sec);
540 /* When decrementer expires,
541 * all we need to do is generate or queue a CPU exception
543 static always_inline void cpu_ppc_decr_excp (CPUState *env)
546 LOG_TB("raise decrementer exception\n");
547 ppc_set_irq(env, PPC_INTERRUPT_DECR, 1);
550 static always_inline void cpu_ppc_hdecr_excp (CPUState *env)
553 LOG_TB("raise decrementer exception\n");
554 ppc_set_irq(env, PPC_INTERRUPT_HDECR, 1);
557 static void __cpu_ppc_store_decr (CPUState *env, uint64_t *nextp,
558 struct QEMUTimer *timer,
559 void (*raise_excp)(CPUState *),
560 uint32_t decr, uint32_t value,
563 ppc_tb_t *tb_env = env->tb_env;
566 LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__,
568 now = qemu_get_clock(vm_clock);
569 next = now + muldiv64(value, ticks_per_sec, tb_env->decr_freq);
571 next += *nextp - now;
576 qemu_mod_timer(timer, next);
577 /* If we set a negative value and the decrementer was positive,
578 * raise an exception.
580 if ((value & 0x80000000) && !(decr & 0x80000000))
584 static always_inline void _cpu_ppc_store_decr (CPUState *env, uint32_t decr,
585 uint32_t value, int is_excp)
587 ppc_tb_t *tb_env = env->tb_env;
589 __cpu_ppc_store_decr(env, &tb_env->decr_next, tb_env->decr_timer,
590 &cpu_ppc_decr_excp, decr, value, is_excp);
593 void cpu_ppc_store_decr (CPUState *env, uint32_t value)
595 _cpu_ppc_store_decr(env, cpu_ppc_load_decr(env), value, 0);
598 static void cpu_ppc_decr_cb (void *opaque)
600 _cpu_ppc_store_decr(opaque, 0x00000000, 0xFFFFFFFF, 1);
603 static always_inline void _cpu_ppc_store_hdecr (CPUState *env, uint32_t hdecr,
604 uint32_t value, int is_excp)
606 ppc_tb_t *tb_env = env->tb_env;
608 if (tb_env->hdecr_timer != NULL) {
609 __cpu_ppc_store_decr(env, &tb_env->hdecr_next, tb_env->hdecr_timer,
610 &cpu_ppc_hdecr_excp, hdecr, value, is_excp);
614 void cpu_ppc_store_hdecr (CPUState *env, uint32_t value)
616 _cpu_ppc_store_hdecr(env, cpu_ppc_load_hdecr(env), value, 0);
619 static void cpu_ppc_hdecr_cb (void *opaque)
621 _cpu_ppc_store_hdecr(opaque, 0x00000000, 0xFFFFFFFF, 1);
624 void cpu_ppc_store_purr (CPUState *env, uint64_t value)
626 ppc_tb_t *tb_env = env->tb_env;
628 tb_env->purr_load = value;
629 tb_env->purr_start = qemu_get_clock(vm_clock);
632 static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq)
634 CPUState *env = opaque;
635 ppc_tb_t *tb_env = env->tb_env;
637 tb_env->tb_freq = freq;
638 tb_env->decr_freq = freq;
639 /* There is a bug in Linux 2.4 kernels:
640 * if a decrementer exception is pending when it enables msr_ee at startup,
641 * it's not ready to handle it...
643 _cpu_ppc_store_decr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
644 _cpu_ppc_store_hdecr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
645 cpu_ppc_store_purr(env, 0x0000000000000000ULL);
648 /* Set up (once) timebase frequency (in Hz) */
649 clk_setup_cb cpu_ppc_tb_init (CPUState *env, uint32_t freq)
653 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
656 env->tb_env = tb_env;
657 /* Create new timer */
658 tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_ppc_decr_cb, env);
660 /* XXX: find a suitable condition to enable the hypervisor decrementer
662 tb_env->hdecr_timer = qemu_new_timer(vm_clock, &cpu_ppc_hdecr_cb, env);
664 tb_env->hdecr_timer = NULL;
666 cpu_ppc_set_tb_clk(env, freq);
668 return &cpu_ppc_set_tb_clk;
671 /* Specific helpers for POWER & PowerPC 601 RTC */
673 static clk_setup_cb cpu_ppc601_rtc_init (CPUState *env)
675 return cpu_ppc_tb_init(env, 7812500);
679 void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
681 _cpu_ppc_store_tbu(env, value);
684 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
686 return _cpu_ppc_load_tbu(env);
689 void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value)
691 cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
694 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
696 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
699 /*****************************************************************************/
700 /* Embedded PowerPC timers */
703 typedef struct ppcemb_timer_t ppcemb_timer_t;
704 struct ppcemb_timer_t {
705 uint64_t pit_reload; /* PIT auto-reload value */
706 uint64_t fit_next; /* Tick for next FIT interrupt */
707 struct QEMUTimer *fit_timer;
708 uint64_t wdt_next; /* Tick for next WDT interrupt */
709 struct QEMUTimer *wdt_timer;
712 /* Fixed interval timer */
713 static void cpu_4xx_fit_cb (void *opaque)
717 ppcemb_timer_t *ppcemb_timer;
721 tb_env = env->tb_env;
722 ppcemb_timer = tb_env->opaque;
723 now = qemu_get_clock(vm_clock);
724 switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) {
738 /* Cannot occur, but makes gcc happy */
741 next = now + muldiv64(next, ticks_per_sec, tb_env->tb_freq);
744 qemu_mod_timer(ppcemb_timer->fit_timer, next);
745 env->spr[SPR_40x_TSR] |= 1 << 26;
746 if ((env->spr[SPR_40x_TCR] >> 23) & 0x1)
747 ppc_set_irq(env, PPC_INTERRUPT_FIT, 1);
748 LOG_TB("%s: ir %d TCR " ADDRX " TSR " ADDRX "\n", __func__,
749 (int)((env->spr[SPR_40x_TCR] >> 23) & 0x1),
750 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
753 /* Programmable interval timer */
754 static void start_stop_pit (CPUState *env, ppc_tb_t *tb_env, int is_excp)
756 ppcemb_timer_t *ppcemb_timer;
759 ppcemb_timer = tb_env->opaque;
760 if (ppcemb_timer->pit_reload <= 1 ||
761 !((env->spr[SPR_40x_TCR] >> 26) & 0x1) ||
762 (is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) {
764 LOG_TB("%s: stop PIT\n", __func__);
765 qemu_del_timer(tb_env->decr_timer);
767 LOG_TB("%s: start PIT %016" PRIx64 "\n",
768 __func__, ppcemb_timer->pit_reload);
769 now = qemu_get_clock(vm_clock);
770 next = now + muldiv64(ppcemb_timer->pit_reload,
771 ticks_per_sec, tb_env->decr_freq);
773 next += tb_env->decr_next - now;
776 qemu_mod_timer(tb_env->decr_timer, next);
777 tb_env->decr_next = next;
781 static void cpu_4xx_pit_cb (void *opaque)
785 ppcemb_timer_t *ppcemb_timer;
788 tb_env = env->tb_env;
789 ppcemb_timer = tb_env->opaque;
790 env->spr[SPR_40x_TSR] |= 1 << 27;
791 if ((env->spr[SPR_40x_TCR] >> 26) & 0x1)
792 ppc_set_irq(env, PPC_INTERRUPT_PIT, 1);
793 start_stop_pit(env, tb_env, 1);
794 LOG_TB("%s: ar %d ir %d TCR " ADDRX " TSR " ADDRX " "
795 "%016" PRIx64 "\n", __func__,
796 (int)((env->spr[SPR_40x_TCR] >> 22) & 0x1),
797 (int)((env->spr[SPR_40x_TCR] >> 26) & 0x1),
798 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR],
799 ppcemb_timer->pit_reload);
803 static void cpu_4xx_wdt_cb (void *opaque)
807 ppcemb_timer_t *ppcemb_timer;
811 tb_env = env->tb_env;
812 ppcemb_timer = tb_env->opaque;
813 now = qemu_get_clock(vm_clock);
814 switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) {
828 /* Cannot occur, but makes gcc happy */
831 next = now + muldiv64(next, ticks_per_sec, tb_env->decr_freq);
834 LOG_TB("%s: TCR " ADDRX " TSR " ADDRX "\n", __func__,
835 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
836 switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) {
839 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
840 ppcemb_timer->wdt_next = next;
841 env->spr[SPR_40x_TSR] |= 1 << 31;
844 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
845 ppcemb_timer->wdt_next = next;
846 env->spr[SPR_40x_TSR] |= 1 << 30;
847 if ((env->spr[SPR_40x_TCR] >> 27) & 0x1)
848 ppc_set_irq(env, PPC_INTERRUPT_WDT, 1);
851 env->spr[SPR_40x_TSR] &= ~0x30000000;
852 env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
853 switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) {
857 case 0x1: /* Core reset */
858 ppc40x_core_reset(env);
860 case 0x2: /* Chip reset */
861 ppc40x_chip_reset(env);
863 case 0x3: /* System reset */
864 ppc40x_system_reset(env);
870 void store_40x_pit (CPUState *env, target_ulong val)
873 ppcemb_timer_t *ppcemb_timer;
875 tb_env = env->tb_env;
876 ppcemb_timer = tb_env->opaque;
877 LOG_TB("%s val" ADDRX "\n", __func__, val);
878 ppcemb_timer->pit_reload = val;
879 start_stop_pit(env, tb_env, 0);
882 target_ulong load_40x_pit (CPUState *env)
884 return cpu_ppc_load_decr(env);
887 void store_booke_tsr (CPUState *env, target_ulong val)
889 LOG_TB("%s: val " ADDRX "\n", __func__, val);
890 env->spr[SPR_40x_TSR] &= ~(val & 0xFC000000);
891 if (val & 0x80000000)
892 ppc_set_irq(env, PPC_INTERRUPT_PIT, 0);
895 void store_booke_tcr (CPUState *env, target_ulong val)
899 tb_env = env->tb_env;
900 LOG_TB("%s: val " ADDRX "\n", __func__, val);
901 env->spr[SPR_40x_TCR] = val & 0xFFC00000;
902 start_stop_pit(env, tb_env, 1);
906 static void ppc_emb_set_tb_clk (void *opaque, uint32_t freq)
908 CPUState *env = opaque;
909 ppc_tb_t *tb_env = env->tb_env;
911 LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__,
913 tb_env->tb_freq = freq;
914 tb_env->decr_freq = freq;
915 /* XXX: we should also update all timers */
918 clk_setup_cb ppc_emb_timers_init (CPUState *env, uint32_t freq)
921 ppcemb_timer_t *ppcemb_timer;
923 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
924 if (tb_env == NULL) {
927 env->tb_env = tb_env;
928 ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t));
929 tb_env->tb_freq = freq;
930 tb_env->decr_freq = freq;
931 tb_env->opaque = ppcemb_timer;
932 LOG_TB("%s freq %" PRIu32 "\n", __func__, freq);
933 if (ppcemb_timer != NULL) {
934 /* We use decr timer for PIT */
935 tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_4xx_pit_cb, env);
936 ppcemb_timer->fit_timer =
937 qemu_new_timer(vm_clock, &cpu_4xx_fit_cb, env);
938 ppcemb_timer->wdt_timer =
939 qemu_new_timer(vm_clock, &cpu_4xx_wdt_cb, env);
942 return &ppc_emb_set_tb_clk;
945 /*****************************************************************************/
946 /* Embedded PowerPC Device Control Registers */
947 typedef struct ppc_dcrn_t ppc_dcrn_t;
949 dcr_read_cb dcr_read;
950 dcr_write_cb dcr_write;
954 /* XXX: on 460, DCR addresses are 32 bits wide,
955 * using DCRIPR to get the 22 upper bits of the DCR address
959 ppc_dcrn_t dcrn[DCRN_NB];
960 int (*read_error)(int dcrn);
961 int (*write_error)(int dcrn);
964 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp)
968 if (dcrn < 0 || dcrn >= DCRN_NB)
970 dcr = &dcr_env->dcrn[dcrn];
971 if (dcr->dcr_read == NULL)
973 *valp = (*dcr->dcr_read)(dcr->opaque, dcrn);
978 if (dcr_env->read_error != NULL)
979 return (*dcr_env->read_error)(dcrn);
984 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val)
988 if (dcrn < 0 || dcrn >= DCRN_NB)
990 dcr = &dcr_env->dcrn[dcrn];
991 if (dcr->dcr_write == NULL)
993 (*dcr->dcr_write)(dcr->opaque, dcrn, val);
998 if (dcr_env->write_error != NULL)
999 return (*dcr_env->write_error)(dcrn);
1004 int ppc_dcr_register (CPUState *env, int dcrn, void *opaque,
1005 dcr_read_cb dcr_read, dcr_write_cb dcr_write)
1010 dcr_env = env->dcr_env;
1011 if (dcr_env == NULL)
1013 if (dcrn < 0 || dcrn >= DCRN_NB)
1015 dcr = &dcr_env->dcrn[dcrn];
1016 if (dcr->opaque != NULL ||
1017 dcr->dcr_read != NULL ||
1018 dcr->dcr_write != NULL)
1020 dcr->opaque = opaque;
1021 dcr->dcr_read = dcr_read;
1022 dcr->dcr_write = dcr_write;
1027 int ppc_dcr_init (CPUState *env, int (*read_error)(int dcrn),
1028 int (*write_error)(int dcrn))
1032 dcr_env = qemu_mallocz(sizeof(ppc_dcr_t));
1033 if (dcr_env == NULL)
1035 dcr_env->read_error = read_error;
1036 dcr_env->write_error = write_error;
1037 env->dcr_env = dcr_env;
1043 /*****************************************************************************/
1044 /* Handle system reset (for now, just stop emulation) */
1045 void cpu_ppc_reset (CPUState *env)
1047 printf("Reset asked... Stop emulation\n");
1052 /*****************************************************************************/
1054 void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
1066 printf("Set loglevel to %04" PRIx32 "\n", val);
1067 cpu_set_log(val | 0x100);
1072 /*****************************************************************************/
1074 static inline uint32_t nvram_read (nvram_t *nvram, uint32_t addr)
1076 return (*nvram->read_fn)(nvram->opaque, addr);;
1079 static inline void nvram_write (nvram_t *nvram, uint32_t addr, uint32_t val)
1081 (*nvram->write_fn)(nvram->opaque, addr, val);
1084 void NVRAM_set_byte (nvram_t *nvram, uint32_t addr, uint8_t value)
1086 nvram_write(nvram, addr, value);
1089 uint8_t NVRAM_get_byte (nvram_t *nvram, uint32_t addr)
1091 return nvram_read(nvram, addr);
1094 void NVRAM_set_word (nvram_t *nvram, uint32_t addr, uint16_t value)
1096 nvram_write(nvram, addr, value >> 8);
1097 nvram_write(nvram, addr + 1, value & 0xFF);
1100 uint16_t NVRAM_get_word (nvram_t *nvram, uint32_t addr)
1104 tmp = nvram_read(nvram, addr) << 8;
1105 tmp |= nvram_read(nvram, addr + 1);
1110 void NVRAM_set_lword (nvram_t *nvram, uint32_t addr, uint32_t value)
1112 nvram_write(nvram, addr, value >> 24);
1113 nvram_write(nvram, addr + 1, (value >> 16) & 0xFF);
1114 nvram_write(nvram, addr + 2, (value >> 8) & 0xFF);
1115 nvram_write(nvram, addr + 3, value & 0xFF);
1118 uint32_t NVRAM_get_lword (nvram_t *nvram, uint32_t addr)
1122 tmp = nvram_read(nvram, addr) << 24;
1123 tmp |= nvram_read(nvram, addr + 1) << 16;
1124 tmp |= nvram_read(nvram, addr + 2) << 8;
1125 tmp |= nvram_read(nvram, addr + 3);
1130 void NVRAM_set_string (nvram_t *nvram, uint32_t addr,
1131 const char *str, uint32_t max)
1135 for (i = 0; i < max && str[i] != '\0'; i++) {
1136 nvram_write(nvram, addr + i, str[i]);
1138 nvram_write(nvram, addr + i, str[i]);
1139 nvram_write(nvram, addr + max - 1, '\0');
1142 int NVRAM_get_string (nvram_t *nvram, uint8_t *dst, uint16_t addr, int max)
1146 memset(dst, 0, max);
1147 for (i = 0; i < max; i++) {
1148 dst[i] = NVRAM_get_byte(nvram, addr + i);
1156 static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
1159 uint16_t pd, pd1, pd2;
1164 pd2 = ((pd >> 4) & 0x000F) ^ pd1;
1165 tmp ^= (pd1 << 3) | (pd1 << 8);
1166 tmp ^= pd2 | (pd2 << 7) | (pd2 << 12);
1171 static uint16_t NVRAM_compute_crc (nvram_t *nvram, uint32_t start, uint32_t count)
1174 uint16_t crc = 0xFFFF;
1179 for (i = 0; i != count; i++) {
1180 crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i));
1183 crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
1189 #define CMDLINE_ADDR 0x017ff000
1191 int PPC_NVRAM_set_params (nvram_t *nvram, uint16_t NVRAM_size,
1193 uint32_t RAM_size, int boot_device,
1194 uint32_t kernel_image, uint32_t kernel_size,
1195 const char *cmdline,
1196 uint32_t initrd_image, uint32_t initrd_size,
1197 uint32_t NVRAM_image,
1198 int width, int height, int depth)
1202 /* Set parameters for Open Hack'Ware BIOS */
1203 NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16);
1204 NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */
1205 NVRAM_set_word(nvram, 0x14, NVRAM_size);
1206 NVRAM_set_string(nvram, 0x20, arch, 16);
1207 NVRAM_set_lword(nvram, 0x30, RAM_size);
1208 NVRAM_set_byte(nvram, 0x34, boot_device);
1209 NVRAM_set_lword(nvram, 0x38, kernel_image);
1210 NVRAM_set_lword(nvram, 0x3C, kernel_size);
1212 /* XXX: put the cmdline in NVRAM too ? */
1213 strcpy((char *)(phys_ram_base + CMDLINE_ADDR), cmdline);
1214 NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
1215 NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
1217 NVRAM_set_lword(nvram, 0x40, 0);
1218 NVRAM_set_lword(nvram, 0x44, 0);
1220 NVRAM_set_lword(nvram, 0x48, initrd_image);
1221 NVRAM_set_lword(nvram, 0x4C, initrd_size);
1222 NVRAM_set_lword(nvram, 0x50, NVRAM_image);
1224 NVRAM_set_word(nvram, 0x54, width);
1225 NVRAM_set_word(nvram, 0x56, height);
1226 NVRAM_set_word(nvram, 0x58, depth);
1227 crc = NVRAM_compute_crc(nvram, 0x00, 0xF8);
1228 NVRAM_set_word(nvram, 0xFC, crc);