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"
32 //#define PPC_DEBUG_IRQ
33 //#define PPC_DEBUG_TB
36 # define LOG_IRQ(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__)
38 # define LOG_IRQ(...) do { } while (0)
43 # define LOG_TB(...) qemu_log(__VA_ARGS__)
45 # define LOG_TB(...) do { } while (0)
48 static void cpu_ppc_tb_stop (CPUState *env);
49 static void cpu_ppc_tb_start (CPUState *env);
51 static void ppc_set_irq (CPUState *env, int n_IRQ, int level)
54 env->pending_interrupts |= 1 << n_IRQ;
55 cpu_interrupt(env, CPU_INTERRUPT_HARD);
57 env->pending_interrupts &= ~(1 << n_IRQ);
58 if (env->pending_interrupts == 0)
59 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
61 LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32
62 "req %08x\n", __func__, env, n_IRQ, level,
63 env->pending_interrupts, env->interrupt_request);
66 /* PowerPC 6xx / 7xx internal IRQ controller */
67 static void ppc6xx_set_irq (void *opaque, int pin, int level)
69 CPUState *env = opaque;
72 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
74 cur_level = (env->irq_input_state >> pin) & 1;
75 /* Don't generate spurious events */
76 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
78 case PPC6xx_INPUT_TBEN:
79 /* Level sensitive - active high */
80 LOG_IRQ("%s: %s the time base\n",
81 __func__, level ? "start" : "stop");
83 cpu_ppc_tb_start(env);
87 case PPC6xx_INPUT_INT:
88 /* Level sensitive - active high */
89 LOG_IRQ("%s: set the external IRQ state to %d\n",
91 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
93 case PPC6xx_INPUT_SMI:
94 /* Level sensitive - active high */
95 LOG_IRQ("%s: set the SMI IRQ state to %d\n",
97 ppc_set_irq(env, PPC_INTERRUPT_SMI, level);
99 case PPC6xx_INPUT_MCP:
100 /* Negative edge sensitive */
101 /* XXX: TODO: actual reaction may depends on HID0 status
102 * 603/604/740/750: check HID0[EMCP]
104 if (cur_level == 1 && level == 0) {
105 LOG_IRQ("%s: raise machine check state\n",
107 ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
110 case PPC6xx_INPUT_CKSTP_IN:
111 /* Level sensitive - active low */
112 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
113 /* XXX: Note that the only way to restart the CPU is to reset it */
115 LOG_IRQ("%s: stop the CPU\n", __func__);
119 case PPC6xx_INPUT_HRESET:
120 /* Level sensitive - active low */
122 LOG_IRQ("%s: reset the CPU\n", __func__);
123 env->interrupt_request |= CPU_INTERRUPT_EXITTB;
128 qemu_system_reset_request();
132 case PPC6xx_INPUT_SRESET:
133 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
135 ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
138 /* Unknown pin - do nothing */
139 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
143 env->irq_input_state |= 1 << pin;
145 env->irq_input_state &= ~(1 << pin);
149 void ppc6xx_irq_init (CPUState *env)
151 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, env,
155 #if defined(TARGET_PPC64)
156 /* PowerPC 970 internal IRQ controller */
157 static void ppc970_set_irq (void *opaque, int pin, int level)
159 CPUState *env = opaque;
162 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
164 cur_level = (env->irq_input_state >> pin) & 1;
165 /* Don't generate spurious events */
166 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
168 case PPC970_INPUT_INT:
169 /* Level sensitive - active high */
170 LOG_IRQ("%s: set the external IRQ state to %d\n",
172 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
174 case PPC970_INPUT_THINT:
175 /* Level sensitive - active high */
176 LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__,
178 ppc_set_irq(env, PPC_INTERRUPT_THERM, level);
180 case PPC970_INPUT_MCP:
181 /* Negative edge sensitive */
182 /* XXX: TODO: actual reaction may depends on HID0 status
183 * 603/604/740/750: check HID0[EMCP]
185 if (cur_level == 1 && level == 0) {
186 LOG_IRQ("%s: raise machine check state\n",
188 ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
191 case PPC970_INPUT_CKSTP:
192 /* Level sensitive - active low */
193 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
195 LOG_IRQ("%s: stop the CPU\n", __func__);
198 LOG_IRQ("%s: restart the CPU\n", __func__);
202 case PPC970_INPUT_HRESET:
203 /* Level sensitive - active low */
206 LOG_IRQ("%s: reset the CPU\n", __func__);
211 case PPC970_INPUT_SRESET:
212 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
214 ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
216 case PPC970_INPUT_TBEN:
217 LOG_IRQ("%s: set the TBEN state to %d\n", __func__,
222 /* Unknown pin - do nothing */
223 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
227 env->irq_input_state |= 1 << pin;
229 env->irq_input_state &= ~(1 << pin);
233 void ppc970_irq_init (CPUState *env)
235 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, env,
238 #endif /* defined(TARGET_PPC64) */
240 /* PowerPC 40x internal IRQ controller */
241 static void ppc40x_set_irq (void *opaque, int pin, int level)
243 CPUState *env = opaque;
246 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
248 cur_level = (env->irq_input_state >> pin) & 1;
249 /* Don't generate spurious events */
250 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
252 case PPC40x_INPUT_RESET_SYS:
254 LOG_IRQ("%s: reset the PowerPC system\n",
256 ppc40x_system_reset(env);
259 case PPC40x_INPUT_RESET_CHIP:
261 LOG_IRQ("%s: reset the PowerPC chip\n", __func__);
262 ppc40x_chip_reset(env);
265 case PPC40x_INPUT_RESET_CORE:
266 /* XXX: TODO: update DBSR[MRR] */
268 LOG_IRQ("%s: reset the PowerPC core\n", __func__);
269 ppc40x_core_reset(env);
272 case PPC40x_INPUT_CINT:
273 /* Level sensitive - active high */
274 LOG_IRQ("%s: set the critical IRQ state to %d\n",
276 ppc_set_irq(env, PPC_INTERRUPT_CEXT, level);
278 case PPC40x_INPUT_INT:
279 /* Level sensitive - active high */
280 LOG_IRQ("%s: set the external IRQ state to %d\n",
282 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
284 case PPC40x_INPUT_HALT:
285 /* Level sensitive - active low */
287 LOG_IRQ("%s: stop the CPU\n", __func__);
290 LOG_IRQ("%s: restart the CPU\n", __func__);
294 case PPC40x_INPUT_DEBUG:
295 /* Level sensitive - active high */
296 LOG_IRQ("%s: set the debug pin state to %d\n",
298 ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level);
301 /* Unknown pin - do nothing */
302 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
306 env->irq_input_state |= 1 << pin;
308 env->irq_input_state &= ~(1 << pin);
312 void ppc40x_irq_init (CPUState *env)
314 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq,
315 env, PPC40x_INPUT_NB);
318 /* PowerPC E500 internal IRQ controller */
319 static void ppce500_set_irq (void *opaque, int pin, int level)
321 CPUState *env = opaque;
324 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
326 cur_level = (env->irq_input_state >> pin) & 1;
327 /* Don't generate spurious events */
328 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
330 case PPCE500_INPUT_MCK:
332 LOG_IRQ("%s: reset the PowerPC system\n",
334 qemu_system_reset_request();
337 case PPCE500_INPUT_RESET_CORE:
339 LOG_IRQ("%s: reset the PowerPC core\n", __func__);
340 ppc_set_irq(env, PPC_INTERRUPT_MCK, level);
343 case PPCE500_INPUT_CINT:
344 /* Level sensitive - active high */
345 LOG_IRQ("%s: set the critical IRQ state to %d\n",
347 ppc_set_irq(env, PPC_INTERRUPT_CEXT, level);
349 case PPCE500_INPUT_INT:
350 /* Level sensitive - active high */
351 LOG_IRQ("%s: set the core IRQ state to %d\n",
353 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
355 case PPCE500_INPUT_DEBUG:
356 /* Level sensitive - active high */
357 LOG_IRQ("%s: set the debug pin state to %d\n",
359 ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level);
362 /* Unknown pin - do nothing */
363 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
367 env->irq_input_state |= 1 << pin;
369 env->irq_input_state &= ~(1 << pin);
373 void ppce500_irq_init (CPUState *env)
375 env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq,
376 env, PPCE500_INPUT_NB);
378 /*****************************************************************************/
379 /* PowerPC time base and decrementer emulation */
381 /* Time base management */
382 int64_t tb_offset; /* Compensation */
383 int64_t atb_offset; /* Compensation */
384 uint32_t tb_freq; /* TB frequency */
385 /* Decrementer management */
386 uint64_t decr_next; /* Tick for next decr interrupt */
387 uint32_t decr_freq; /* decrementer frequency */
388 struct QEMUTimer *decr_timer;
389 /* Hypervisor decrementer management */
390 uint64_t hdecr_next; /* Tick for next hdecr interrupt */
391 struct QEMUTimer *hdecr_timer;
397 static inline uint64_t cpu_ppc_get_tb(ppc_tb_t *tb_env, uint64_t vmclk,
400 /* TB time in tb periods */
401 return muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()) + tb_offset;
404 uint64_t cpu_ppc_load_tbl (CPUState *env)
406 ppc_tb_t *tb_env = env->tb_env;
409 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
410 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
415 static inline uint32_t _cpu_ppc_load_tbu(CPUState *env)
417 ppc_tb_t *tb_env = env->tb_env;
420 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
421 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
426 uint32_t cpu_ppc_load_tbu (CPUState *env)
428 return _cpu_ppc_load_tbu(env);
431 static inline void cpu_ppc_store_tb(ppc_tb_t *tb_env, uint64_t vmclk,
432 int64_t *tb_offsetp, uint64_t value)
434 *tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec());
435 LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n",
436 __func__, value, *tb_offsetp);
439 void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
441 ppc_tb_t *tb_env = env->tb_env;
444 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
445 tb &= 0xFFFFFFFF00000000ULL;
446 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
447 &tb_env->tb_offset, tb | (uint64_t)value);
450 static inline void _cpu_ppc_store_tbu(CPUState *env, uint32_t value)
452 ppc_tb_t *tb_env = env->tb_env;
455 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
456 tb &= 0x00000000FFFFFFFFULL;
457 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
458 &tb_env->tb_offset, ((uint64_t)value << 32) | tb);
461 void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
463 _cpu_ppc_store_tbu(env, value);
466 uint64_t cpu_ppc_load_atbl (CPUState *env)
468 ppc_tb_t *tb_env = env->tb_env;
471 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
472 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
477 uint32_t cpu_ppc_load_atbu (CPUState *env)
479 ppc_tb_t *tb_env = env->tb_env;
482 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
483 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
488 void cpu_ppc_store_atbl (CPUState *env, uint32_t value)
490 ppc_tb_t *tb_env = env->tb_env;
493 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
494 tb &= 0xFFFFFFFF00000000ULL;
495 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
496 &tb_env->atb_offset, tb | (uint64_t)value);
499 void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
501 ppc_tb_t *tb_env = env->tb_env;
504 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
505 tb &= 0x00000000FFFFFFFFULL;
506 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
507 &tb_env->atb_offset, ((uint64_t)value << 32) | tb);
510 static void cpu_ppc_tb_stop (CPUState *env)
512 ppc_tb_t *tb_env = env->tb_env;
513 uint64_t tb, atb, vmclk;
515 /* If the time base is already frozen, do nothing */
516 if (tb_env->tb_freq != 0) {
517 vmclk = qemu_get_clock(vm_clock);
518 /* Get the time base */
519 tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset);
520 /* Get the alternate time base */
521 atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset);
522 /* Store the time base value (ie compute the current offset) */
523 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
524 /* Store the alternate time base value (compute the current offset) */
525 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
526 /* Set the time base frequency to zero */
528 /* Now, the time bases are frozen to tb_offset / atb_offset value */
532 static void cpu_ppc_tb_start (CPUState *env)
534 ppc_tb_t *tb_env = env->tb_env;
535 uint64_t tb, atb, vmclk;
537 /* If the time base is not frozen, do nothing */
538 if (tb_env->tb_freq == 0) {
539 vmclk = qemu_get_clock(vm_clock);
540 /* Get the time base from tb_offset */
541 tb = tb_env->tb_offset;
542 /* Get the alternate time base from atb_offset */
543 atb = tb_env->atb_offset;
544 /* Restore the tb frequency from the decrementer frequency */
545 tb_env->tb_freq = tb_env->decr_freq;
546 /* Store the time base value */
547 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
548 /* Store the alternate time base value */
549 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
553 static inline uint32_t _cpu_ppc_load_decr(CPUState *env, uint64_t next)
555 ppc_tb_t *tb_env = env->tb_env;
559 diff = next - qemu_get_clock(vm_clock);
561 decr = muldiv64(diff, tb_env->decr_freq, get_ticks_per_sec());
563 decr = -muldiv64(-diff, tb_env->decr_freq, get_ticks_per_sec());
564 LOG_TB("%s: %08" PRIx32 "\n", __func__, decr);
569 uint32_t cpu_ppc_load_decr (CPUState *env)
571 ppc_tb_t *tb_env = env->tb_env;
573 return _cpu_ppc_load_decr(env, tb_env->decr_next);
576 uint32_t cpu_ppc_load_hdecr (CPUState *env)
578 ppc_tb_t *tb_env = env->tb_env;
580 return _cpu_ppc_load_decr(env, tb_env->hdecr_next);
583 uint64_t cpu_ppc_load_purr (CPUState *env)
585 ppc_tb_t *tb_env = env->tb_env;
588 diff = qemu_get_clock(vm_clock) - tb_env->purr_start;
590 return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, get_ticks_per_sec());
593 /* When decrementer expires,
594 * all we need to do is generate or queue a CPU exception
596 static inline void cpu_ppc_decr_excp(CPUState *env)
599 LOG_TB("raise decrementer exception\n");
600 ppc_set_irq(env, PPC_INTERRUPT_DECR, 1);
603 static inline void cpu_ppc_hdecr_excp(CPUState *env)
606 LOG_TB("raise decrementer exception\n");
607 ppc_set_irq(env, PPC_INTERRUPT_HDECR, 1);
610 static void __cpu_ppc_store_decr (CPUState *env, uint64_t *nextp,
611 struct QEMUTimer *timer,
612 void (*raise_excp)(CPUState *),
613 uint32_t decr, uint32_t value,
616 ppc_tb_t *tb_env = env->tb_env;
619 LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__,
621 now = qemu_get_clock(vm_clock);
622 next = now + muldiv64(value, get_ticks_per_sec(), tb_env->decr_freq);
624 next += *nextp - now;
629 qemu_mod_timer(timer, next);
630 /* If we set a negative value and the decrementer was positive,
631 * raise an exception.
633 if ((value & 0x80000000) && !(decr & 0x80000000))
637 static inline void _cpu_ppc_store_decr(CPUState *env, uint32_t decr,
638 uint32_t value, int is_excp)
640 ppc_tb_t *tb_env = env->tb_env;
642 __cpu_ppc_store_decr(env, &tb_env->decr_next, tb_env->decr_timer,
643 &cpu_ppc_decr_excp, decr, value, is_excp);
646 void cpu_ppc_store_decr (CPUState *env, uint32_t value)
648 _cpu_ppc_store_decr(env, cpu_ppc_load_decr(env), value, 0);
651 static void cpu_ppc_decr_cb (void *opaque)
653 _cpu_ppc_store_decr(opaque, 0x00000000, 0xFFFFFFFF, 1);
656 static inline void _cpu_ppc_store_hdecr(CPUState *env, uint32_t hdecr,
657 uint32_t value, int is_excp)
659 ppc_tb_t *tb_env = env->tb_env;
661 if (tb_env->hdecr_timer != NULL) {
662 __cpu_ppc_store_decr(env, &tb_env->hdecr_next, tb_env->hdecr_timer,
663 &cpu_ppc_hdecr_excp, hdecr, value, is_excp);
667 void cpu_ppc_store_hdecr (CPUState *env, uint32_t value)
669 _cpu_ppc_store_hdecr(env, cpu_ppc_load_hdecr(env), value, 0);
672 static void cpu_ppc_hdecr_cb (void *opaque)
674 _cpu_ppc_store_hdecr(opaque, 0x00000000, 0xFFFFFFFF, 1);
677 void cpu_ppc_store_purr (CPUState *env, uint64_t value)
679 ppc_tb_t *tb_env = env->tb_env;
681 tb_env->purr_load = value;
682 tb_env->purr_start = qemu_get_clock(vm_clock);
685 static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq)
687 CPUState *env = opaque;
688 ppc_tb_t *tb_env = env->tb_env;
690 tb_env->tb_freq = freq;
691 tb_env->decr_freq = freq;
692 /* There is a bug in Linux 2.4 kernels:
693 * if a decrementer exception is pending when it enables msr_ee at startup,
694 * it's not ready to handle it...
696 _cpu_ppc_store_decr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
697 _cpu_ppc_store_hdecr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
698 cpu_ppc_store_purr(env, 0x0000000000000000ULL);
701 /* Set up (once) timebase frequency (in Hz) */
702 clk_setup_cb cpu_ppc_tb_init (CPUState *env, uint32_t freq)
706 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
707 env->tb_env = tb_env;
708 /* Create new timer */
709 tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_ppc_decr_cb, env);
711 /* XXX: find a suitable condition to enable the hypervisor decrementer
713 tb_env->hdecr_timer = qemu_new_timer(vm_clock, &cpu_ppc_hdecr_cb, env);
715 tb_env->hdecr_timer = NULL;
717 cpu_ppc_set_tb_clk(env, freq);
719 return &cpu_ppc_set_tb_clk;
722 /* Specific helpers for POWER & PowerPC 601 RTC */
724 static clk_setup_cb cpu_ppc601_rtc_init (CPUState *env)
726 return cpu_ppc_tb_init(env, 7812500);
730 void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
732 _cpu_ppc_store_tbu(env, value);
735 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
737 return _cpu_ppc_load_tbu(env);
740 void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value)
742 cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
745 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
747 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
750 /*****************************************************************************/
751 /* Embedded PowerPC timers */
754 typedef struct ppcemb_timer_t ppcemb_timer_t;
755 struct ppcemb_timer_t {
756 uint64_t pit_reload; /* PIT auto-reload value */
757 uint64_t fit_next; /* Tick for next FIT interrupt */
758 struct QEMUTimer *fit_timer;
759 uint64_t wdt_next; /* Tick for next WDT interrupt */
760 struct QEMUTimer *wdt_timer;
763 /* Fixed interval timer */
764 static void cpu_4xx_fit_cb (void *opaque)
768 ppcemb_timer_t *ppcemb_timer;
772 tb_env = env->tb_env;
773 ppcemb_timer = tb_env->opaque;
774 now = qemu_get_clock(vm_clock);
775 switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) {
789 /* Cannot occur, but makes gcc happy */
792 next = now + muldiv64(next, get_ticks_per_sec(), tb_env->tb_freq);
795 qemu_mod_timer(ppcemb_timer->fit_timer, next);
796 env->spr[SPR_40x_TSR] |= 1 << 26;
797 if ((env->spr[SPR_40x_TCR] >> 23) & 0x1)
798 ppc_set_irq(env, PPC_INTERRUPT_FIT, 1);
799 LOG_TB("%s: ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__,
800 (int)((env->spr[SPR_40x_TCR] >> 23) & 0x1),
801 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
804 /* Programmable interval timer */
805 static void start_stop_pit (CPUState *env, ppc_tb_t *tb_env, int is_excp)
807 ppcemb_timer_t *ppcemb_timer;
810 ppcemb_timer = tb_env->opaque;
811 if (ppcemb_timer->pit_reload <= 1 ||
812 !((env->spr[SPR_40x_TCR] >> 26) & 0x1) ||
813 (is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) {
815 LOG_TB("%s: stop PIT\n", __func__);
816 qemu_del_timer(tb_env->decr_timer);
818 LOG_TB("%s: start PIT %016" PRIx64 "\n",
819 __func__, ppcemb_timer->pit_reload);
820 now = qemu_get_clock(vm_clock);
821 next = now + muldiv64(ppcemb_timer->pit_reload,
822 get_ticks_per_sec(), tb_env->decr_freq);
824 next += tb_env->decr_next - now;
827 qemu_mod_timer(tb_env->decr_timer, next);
828 tb_env->decr_next = next;
832 static void cpu_4xx_pit_cb (void *opaque)
836 ppcemb_timer_t *ppcemb_timer;
839 tb_env = env->tb_env;
840 ppcemb_timer = tb_env->opaque;
841 env->spr[SPR_40x_TSR] |= 1 << 27;
842 if ((env->spr[SPR_40x_TCR] >> 26) & 0x1)
843 ppc_set_irq(env, PPC_INTERRUPT_PIT, 1);
844 start_stop_pit(env, tb_env, 1);
845 LOG_TB("%s: ar %d ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx " "
846 "%016" PRIx64 "\n", __func__,
847 (int)((env->spr[SPR_40x_TCR] >> 22) & 0x1),
848 (int)((env->spr[SPR_40x_TCR] >> 26) & 0x1),
849 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR],
850 ppcemb_timer->pit_reload);
854 static void cpu_4xx_wdt_cb (void *opaque)
858 ppcemb_timer_t *ppcemb_timer;
862 tb_env = env->tb_env;
863 ppcemb_timer = tb_env->opaque;
864 now = qemu_get_clock(vm_clock);
865 switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) {
879 /* Cannot occur, but makes gcc happy */
882 next = now + muldiv64(next, get_ticks_per_sec(), tb_env->decr_freq);
885 LOG_TB("%s: TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__,
886 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
887 switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) {
890 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
891 ppcemb_timer->wdt_next = next;
892 env->spr[SPR_40x_TSR] |= 1 << 31;
895 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
896 ppcemb_timer->wdt_next = next;
897 env->spr[SPR_40x_TSR] |= 1 << 30;
898 if ((env->spr[SPR_40x_TCR] >> 27) & 0x1)
899 ppc_set_irq(env, PPC_INTERRUPT_WDT, 1);
902 env->spr[SPR_40x_TSR] &= ~0x30000000;
903 env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
904 switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) {
908 case 0x1: /* Core reset */
909 ppc40x_core_reset(env);
911 case 0x2: /* Chip reset */
912 ppc40x_chip_reset(env);
914 case 0x3: /* System reset */
915 ppc40x_system_reset(env);
921 void store_40x_pit (CPUState *env, target_ulong val)
924 ppcemb_timer_t *ppcemb_timer;
926 tb_env = env->tb_env;
927 ppcemb_timer = tb_env->opaque;
928 LOG_TB("%s val" TARGET_FMT_lx "\n", __func__, val);
929 ppcemb_timer->pit_reload = val;
930 start_stop_pit(env, tb_env, 0);
933 target_ulong load_40x_pit (CPUState *env)
935 return cpu_ppc_load_decr(env);
938 void store_booke_tsr (CPUState *env, target_ulong val)
940 LOG_TB("%s: val " TARGET_FMT_lx "\n", __func__, val);
941 env->spr[SPR_40x_TSR] &= ~(val & 0xFC000000);
942 if (val & 0x80000000)
943 ppc_set_irq(env, PPC_INTERRUPT_PIT, 0);
946 void store_booke_tcr (CPUState *env, target_ulong val)
950 tb_env = env->tb_env;
951 LOG_TB("%s: val " TARGET_FMT_lx "\n", __func__, val);
952 env->spr[SPR_40x_TCR] = val & 0xFFC00000;
953 start_stop_pit(env, tb_env, 1);
957 static void ppc_emb_set_tb_clk (void *opaque, uint32_t freq)
959 CPUState *env = opaque;
960 ppc_tb_t *tb_env = env->tb_env;
962 LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__,
964 tb_env->tb_freq = freq;
965 tb_env->decr_freq = freq;
966 /* XXX: we should also update all timers */
969 clk_setup_cb ppc_emb_timers_init (CPUState *env, uint32_t freq)
972 ppcemb_timer_t *ppcemb_timer;
974 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
975 env->tb_env = tb_env;
976 ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t));
977 tb_env->tb_freq = freq;
978 tb_env->decr_freq = freq;
979 tb_env->opaque = ppcemb_timer;
980 LOG_TB("%s freq %" PRIu32 "\n", __func__, freq);
981 if (ppcemb_timer != NULL) {
982 /* We use decr timer for PIT */
983 tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_4xx_pit_cb, env);
984 ppcemb_timer->fit_timer =
985 qemu_new_timer(vm_clock, &cpu_4xx_fit_cb, env);
986 ppcemb_timer->wdt_timer =
987 qemu_new_timer(vm_clock, &cpu_4xx_wdt_cb, env);
990 return &ppc_emb_set_tb_clk;
993 /*****************************************************************************/
994 /* Embedded PowerPC Device Control Registers */
995 typedef struct ppc_dcrn_t ppc_dcrn_t;
997 dcr_read_cb dcr_read;
998 dcr_write_cb dcr_write;
1002 /* XXX: on 460, DCR addresses are 32 bits wide,
1003 * using DCRIPR to get the 22 upper bits of the DCR address
1005 #define DCRN_NB 1024
1007 ppc_dcrn_t dcrn[DCRN_NB];
1008 int (*read_error)(int dcrn);
1009 int (*write_error)(int dcrn);
1012 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp)
1016 if (dcrn < 0 || dcrn >= DCRN_NB)
1018 dcr = &dcr_env->dcrn[dcrn];
1019 if (dcr->dcr_read == NULL)
1021 *valp = (*dcr->dcr_read)(dcr->opaque, dcrn);
1026 if (dcr_env->read_error != NULL)
1027 return (*dcr_env->read_error)(dcrn);
1032 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val)
1036 if (dcrn < 0 || dcrn >= DCRN_NB)
1038 dcr = &dcr_env->dcrn[dcrn];
1039 if (dcr->dcr_write == NULL)
1041 (*dcr->dcr_write)(dcr->opaque, dcrn, val);
1046 if (dcr_env->write_error != NULL)
1047 return (*dcr_env->write_error)(dcrn);
1052 int ppc_dcr_register (CPUState *env, int dcrn, void *opaque,
1053 dcr_read_cb dcr_read, dcr_write_cb dcr_write)
1058 dcr_env = env->dcr_env;
1059 if (dcr_env == NULL)
1061 if (dcrn < 0 || dcrn >= DCRN_NB)
1063 dcr = &dcr_env->dcrn[dcrn];
1064 if (dcr->opaque != NULL ||
1065 dcr->dcr_read != NULL ||
1066 dcr->dcr_write != NULL)
1068 dcr->opaque = opaque;
1069 dcr->dcr_read = dcr_read;
1070 dcr->dcr_write = dcr_write;
1075 int ppc_dcr_init (CPUState *env, int (*read_error)(int dcrn),
1076 int (*write_error)(int dcrn))
1080 dcr_env = qemu_mallocz(sizeof(ppc_dcr_t));
1081 dcr_env->read_error = read_error;
1082 dcr_env->write_error = write_error;
1083 env->dcr_env = dcr_env;
1089 /*****************************************************************************/
1090 /* Handle system reset (for now, just stop emulation) */
1091 void cpu_reset(CPUState *env)
1093 printf("Reset asked... Stop emulation\n");
1098 /*****************************************************************************/
1100 void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
1112 printf("Set loglevel to %04" PRIx32 "\n", val);
1113 cpu_set_log(val | 0x100);
1118 /*****************************************************************************/
1120 static inline uint32_t nvram_read (nvram_t *nvram, uint32_t addr)
1122 return (*nvram->read_fn)(nvram->opaque, addr);;
1125 static inline void nvram_write (nvram_t *nvram, uint32_t addr, uint32_t val)
1127 (*nvram->write_fn)(nvram->opaque, addr, val);
1130 void NVRAM_set_byte (nvram_t *nvram, uint32_t addr, uint8_t value)
1132 nvram_write(nvram, addr, value);
1135 uint8_t NVRAM_get_byte (nvram_t *nvram, uint32_t addr)
1137 return nvram_read(nvram, addr);
1140 void NVRAM_set_word (nvram_t *nvram, uint32_t addr, uint16_t value)
1142 nvram_write(nvram, addr, value >> 8);
1143 nvram_write(nvram, addr + 1, value & 0xFF);
1146 uint16_t NVRAM_get_word (nvram_t *nvram, uint32_t addr)
1150 tmp = nvram_read(nvram, addr) << 8;
1151 tmp |= nvram_read(nvram, addr + 1);
1156 void NVRAM_set_lword (nvram_t *nvram, uint32_t addr, uint32_t value)
1158 nvram_write(nvram, addr, value >> 24);
1159 nvram_write(nvram, addr + 1, (value >> 16) & 0xFF);
1160 nvram_write(nvram, addr + 2, (value >> 8) & 0xFF);
1161 nvram_write(nvram, addr + 3, value & 0xFF);
1164 uint32_t NVRAM_get_lword (nvram_t *nvram, uint32_t addr)
1168 tmp = nvram_read(nvram, addr) << 24;
1169 tmp |= nvram_read(nvram, addr + 1) << 16;
1170 tmp |= nvram_read(nvram, addr + 2) << 8;
1171 tmp |= nvram_read(nvram, addr + 3);
1176 void NVRAM_set_string (nvram_t *nvram, uint32_t addr,
1177 const char *str, uint32_t max)
1181 for (i = 0; i < max && str[i] != '\0'; i++) {
1182 nvram_write(nvram, addr + i, str[i]);
1184 nvram_write(nvram, addr + i, str[i]);
1185 nvram_write(nvram, addr + max - 1, '\0');
1188 int NVRAM_get_string (nvram_t *nvram, uint8_t *dst, uint16_t addr, int max)
1192 memset(dst, 0, max);
1193 for (i = 0; i < max; i++) {
1194 dst[i] = NVRAM_get_byte(nvram, addr + i);
1202 static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
1205 uint16_t pd, pd1, pd2;
1210 pd2 = ((pd >> 4) & 0x000F) ^ pd1;
1211 tmp ^= (pd1 << 3) | (pd1 << 8);
1212 tmp ^= pd2 | (pd2 << 7) | (pd2 << 12);
1217 static uint16_t NVRAM_compute_crc (nvram_t *nvram, uint32_t start, uint32_t count)
1220 uint16_t crc = 0xFFFF;
1225 for (i = 0; i != count; i++) {
1226 crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i));
1229 crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
1235 #define CMDLINE_ADDR 0x017ff000
1237 int PPC_NVRAM_set_params (nvram_t *nvram, uint16_t NVRAM_size,
1239 uint32_t RAM_size, int boot_device,
1240 uint32_t kernel_image, uint32_t kernel_size,
1241 const char *cmdline,
1242 uint32_t initrd_image, uint32_t initrd_size,
1243 uint32_t NVRAM_image,
1244 int width, int height, int depth)
1248 /* Set parameters for Open Hack'Ware BIOS */
1249 NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16);
1250 NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */
1251 NVRAM_set_word(nvram, 0x14, NVRAM_size);
1252 NVRAM_set_string(nvram, 0x20, arch, 16);
1253 NVRAM_set_lword(nvram, 0x30, RAM_size);
1254 NVRAM_set_byte(nvram, 0x34, boot_device);
1255 NVRAM_set_lword(nvram, 0x38, kernel_image);
1256 NVRAM_set_lword(nvram, 0x3C, kernel_size);
1258 /* XXX: put the cmdline in NVRAM too ? */
1259 pstrcpy_targphys("cmdline", CMDLINE_ADDR, RAM_size - CMDLINE_ADDR, cmdline);
1260 NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
1261 NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
1263 NVRAM_set_lword(nvram, 0x40, 0);
1264 NVRAM_set_lword(nvram, 0x44, 0);
1266 NVRAM_set_lword(nvram, 0x48, initrd_image);
1267 NVRAM_set_lword(nvram, 0x4C, initrd_size);
1268 NVRAM_set_lword(nvram, 0x50, NVRAM_image);
1270 NVRAM_set_word(nvram, 0x54, width);
1271 NVRAM_set_word(nvram, 0x56, height);
1272 NVRAM_set_word(nvram, 0x58, depth);
1273 crc = NVRAM_compute_crc(nvram, 0x00, 0xF8);
1274 NVRAM_set_word(nvram, 0xFC, crc);