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migration: do floating-point division
[qemu.git] / hw / ppc / ppc.c
blob2c604ef49de27169770d37278a0764e14d451eec
1 /*
2 * QEMU generic PowerPC hardware System Emulator
3 *
4 * Copyright (c) 2003-2007 Jocelyn Mayer
5 *
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:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
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
22 * THE SOFTWARE.
23 */
24 #include "hw/hw.h"
25 #include "hw/ppc/ppc.h"
26 #include "hw/ppc/ppc_e500.h"
27 #include "qemu/timer.h"
28 #include "sysemu/sysemu.h"
29 #include "sysemu/cpus.h"
30 #include "hw/timer/m48t59.h"
31 #include "qemu/log.h"
32 #include "qemu/error-report.h"
33 #include "hw/loader.h"
34 #include "sysemu/kvm.h"
35 #include "kvm_ppc.h"
36 #include "trace.h"
37
38 //#define PPC_DEBUG_IRQ
39 //#define PPC_DEBUG_TB
40
41 #ifdef PPC_DEBUG_IRQ
42 # define LOG_IRQ(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__)
43 #else
44 # define LOG_IRQ(...) do { } while (0)
45 #endif
46
47
48 #ifdef PPC_DEBUG_TB
49 # define LOG_TB(...) qemu_log(__VA_ARGS__)
50 #else
51 # define LOG_TB(...) do { } while (0)
52 #endif
53
54 static void cpu_ppc_tb_stop (CPUPPCState *env);
55 static void cpu_ppc_tb_start (CPUPPCState *env);
56
57 void ppc_set_irq(PowerPCCPU *cpu, int n_IRQ, int level)
58 {
59 CPUState *cs = CPU(cpu);
60 CPUPPCState *env = &cpu->env;
61 unsigned int old_pending = env->pending_interrupts;
62
63 if (level) {
64 env->pending_interrupts |= 1 << n_IRQ;
65 cpu_interrupt(cs, CPU_INTERRUPT_HARD);
66 } else {
67 env->pending_interrupts &= ~(1 << n_IRQ);
68 if (env->pending_interrupts == 0) {
69 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
70 }
71 }
72
73 if (old_pending != env->pending_interrupts) {
74 #ifdef CONFIG_KVM
75 kvmppc_set_interrupt(cpu, n_IRQ, level);
76 #endif
77 }
78
79 LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32
80 "req %08x\n", __func__, env, n_IRQ, level,
81 env->pending_interrupts, CPU(cpu)->interrupt_request);
82 }
83
84 /* PowerPC 6xx / 7xx internal IRQ controller */
85 static void ppc6xx_set_irq(void *opaque, int pin, int level)
86 {
87 PowerPCCPU *cpu = opaque;
88 CPUPPCState *env = &cpu->env;
89 int cur_level;
90
91 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
92 env, pin, level);
93 cur_level = (env->irq_input_state >> pin) & 1;
94 /* Don't generate spurious events */
95 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
96 CPUState *cs = CPU(cpu);
97
98 switch (pin) {
99 case PPC6xx_INPUT_TBEN:
100 /* Level sensitive - active high */
101 LOG_IRQ("%s: %s the time base\n",
102 __func__, level ? "start" : "stop");
103 if (level) {
104 cpu_ppc_tb_start(env);
105 } else {
106 cpu_ppc_tb_stop(env);
107 }
108 case PPC6xx_INPUT_INT:
109 /* Level sensitive - active high */
110 LOG_IRQ("%s: set the external IRQ state to %d\n",
111 __func__, level);
112 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
113 break;
114 case PPC6xx_INPUT_SMI:
115 /* Level sensitive - active high */
116 LOG_IRQ("%s: set the SMI IRQ state to %d\n",
117 __func__, level);
118 ppc_set_irq(cpu, PPC_INTERRUPT_SMI, level);
119 break;
120 case PPC6xx_INPUT_MCP:
121 /* Negative edge sensitive */
122 /* XXX: TODO: actual reaction may depends on HID0 status
123 * 603/604/740/750: check HID0[EMCP]
124 */
125 if (cur_level == 1 && level == 0) {
126 LOG_IRQ("%s: raise machine check state\n",
127 __func__);
128 ppc_set_irq(cpu, PPC_INTERRUPT_MCK, 1);
129 }
130 break;
131 case PPC6xx_INPUT_CKSTP_IN:
132 /* Level sensitive - active low */
133 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
134 /* XXX: Note that the only way to restart the CPU is to reset it */
135 if (level) {
136 LOG_IRQ("%s: stop the CPU\n", __func__);
137 cs->halted = 1;
138 }
139 break;
140 case PPC6xx_INPUT_HRESET:
141 /* Level sensitive - active low */
142 if (level) {
143 LOG_IRQ("%s: reset the CPU\n", __func__);
144 cpu_interrupt(cs, CPU_INTERRUPT_RESET);
145 }
146 break;
147 case PPC6xx_INPUT_SRESET:
148 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
149 __func__, level);
150 ppc_set_irq(cpu, PPC_INTERRUPT_RESET, level);
151 break;
152 default:
153 /* Unknown pin - do nothing */
154 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
155 return;
156 }
157 if (level)
158 env->irq_input_state |= 1 << pin;
159 else
160 env->irq_input_state &= ~(1 << pin);
161 }
162 }
163
164 void ppc6xx_irq_init(CPUPPCState *env)
165 {
166 PowerPCCPU *cpu = ppc_env_get_cpu(env);
167
168 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, cpu,
169 PPC6xx_INPUT_NB);
170 }
171
172 #if defined(TARGET_PPC64)
173 /* PowerPC 970 internal IRQ controller */
174 static void ppc970_set_irq(void *opaque, int pin, int level)
175 {
176 PowerPCCPU *cpu = opaque;
177 CPUPPCState *env = &cpu->env;
178 int cur_level;
179
180 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
181 env, pin, level);
182 cur_level = (env->irq_input_state >> pin) & 1;
183 /* Don't generate spurious events */
184 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
185 CPUState *cs = CPU(cpu);
186
187 switch (pin) {
188 case PPC970_INPUT_INT:
189 /* Level sensitive - active high */
190 LOG_IRQ("%s: set the external IRQ state to %d\n",
191 __func__, level);
192 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
193 break;
194 case PPC970_INPUT_THINT:
195 /* Level sensitive - active high */
196 LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__,
197 level);
198 ppc_set_irq(cpu, PPC_INTERRUPT_THERM, level);
199 break;
200 case PPC970_INPUT_MCP:
201 /* Negative edge sensitive */
202 /* XXX: TODO: actual reaction may depends on HID0 status
203 * 603/604/740/750: check HID0[EMCP]
204 */
205 if (cur_level == 1 && level == 0) {
206 LOG_IRQ("%s: raise machine check state\n",
207 __func__);
208 ppc_set_irq(cpu, PPC_INTERRUPT_MCK, 1);
209 }
210 break;
211 case PPC970_INPUT_CKSTP:
212 /* Level sensitive - active low */
213 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
214 if (level) {
215 LOG_IRQ("%s: stop the CPU\n", __func__);
216 cs->halted = 1;
217 } else {
218 LOG_IRQ("%s: restart the CPU\n", __func__);
219 cs->halted = 0;
220 qemu_cpu_kick(cs);
221 }
222 break;
223 case PPC970_INPUT_HRESET:
224 /* Level sensitive - active low */
225 if (level) {
226 cpu_interrupt(cs, CPU_INTERRUPT_RESET);
227 }
228 break;
229 case PPC970_INPUT_SRESET:
230 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
231 __func__, level);
232 ppc_set_irq(cpu, PPC_INTERRUPT_RESET, level);
233 break;
234 case PPC970_INPUT_TBEN:
235 LOG_IRQ("%s: set the TBEN state to %d\n", __func__,
236 level);
237 /* XXX: TODO */
238 break;
239 default:
240 /* Unknown pin - do nothing */
241 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
242 return;
243 }
244 if (level)
245 env->irq_input_state |= 1 << pin;
246 else
247 env->irq_input_state &= ~(1 << pin);
248 }
249 }
250
251 void ppc970_irq_init(CPUPPCState *env)
252 {
253 PowerPCCPU *cpu = ppc_env_get_cpu(env);
254
255 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, cpu,
256 PPC970_INPUT_NB);
257 }
258
259 /* POWER7 internal IRQ controller */
260 static void power7_set_irq(void *opaque, int pin, int level)
261 {
262 PowerPCCPU *cpu = opaque;
263 CPUPPCState *env = &cpu->env;
264
265 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
266 env, pin, level);
267
268 switch (pin) {
269 case POWER7_INPUT_INT:
270 /* Level sensitive - active high */
271 LOG_IRQ("%s: set the external IRQ state to %d\n",
272 __func__, level);
273 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
274 break;
275 default:
276 /* Unknown pin - do nothing */
277 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
278 return;
279 }
280 if (level) {
281 env->irq_input_state |= 1 << pin;
282 } else {
283 env->irq_input_state &= ~(1 << pin);
284 }
285 }
286
287 void ppcPOWER7_irq_init(CPUPPCState *env)
288 {
289 PowerPCCPU *cpu = ppc_env_get_cpu(env);
290
291 env->irq_inputs = (void **)qemu_allocate_irqs(&power7_set_irq, cpu,
292 POWER7_INPUT_NB);
293 }
294 #endif /* defined(TARGET_PPC64) */
295
296 /* PowerPC 40x internal IRQ controller */
297 static void ppc40x_set_irq(void *opaque, int pin, int level)
298 {
299 PowerPCCPU *cpu = opaque;
300 CPUPPCState *env = &cpu->env;
301 int cur_level;
302
303 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
304 env, pin, level);
305 cur_level = (env->irq_input_state >> pin) & 1;
306 /* Don't generate spurious events */
307 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
308 CPUState *cs = CPU(cpu);
309
310 switch (pin) {
311 case PPC40x_INPUT_RESET_SYS:
312 if (level) {
313 LOG_IRQ("%s: reset the PowerPC system\n",
314 __func__);
315 ppc40x_system_reset(cpu);
316 }
317 break;
318 case PPC40x_INPUT_RESET_CHIP:
319 if (level) {
320 LOG_IRQ("%s: reset the PowerPC chip\n", __func__);
321 ppc40x_chip_reset(cpu);
322 }
323 break;
324 case PPC40x_INPUT_RESET_CORE:
325 /* XXX: TODO: update DBSR[MRR] */
326 if (level) {
327 LOG_IRQ("%s: reset the PowerPC core\n", __func__);
328 ppc40x_core_reset(cpu);
329 }
330 break;
331 case PPC40x_INPUT_CINT:
332 /* Level sensitive - active high */
333 LOG_IRQ("%s: set the critical IRQ state to %d\n",
334 __func__, level);
335 ppc_set_irq(cpu, PPC_INTERRUPT_CEXT, level);
336 break;
337 case PPC40x_INPUT_INT:
338 /* Level sensitive - active high */
339 LOG_IRQ("%s: set the external IRQ state to %d\n",
340 __func__, level);
341 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
342 break;
343 case PPC40x_INPUT_HALT:
344 /* Level sensitive - active low */
345 if (level) {
346 LOG_IRQ("%s: stop the CPU\n", __func__);
347 cs->halted = 1;
348 } else {
349 LOG_IRQ("%s: restart the CPU\n", __func__);
350 cs->halted = 0;
351 qemu_cpu_kick(cs);
352 }
353 break;
354 case PPC40x_INPUT_DEBUG:
355 /* Level sensitive - active high */
356 LOG_IRQ("%s: set the debug pin state to %d\n",
357 __func__, level);
358 ppc_set_irq(cpu, PPC_INTERRUPT_DEBUG, level);
359 break;
360 default:
361 /* Unknown pin - do nothing */
362 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
363 return;
364 }
365 if (level)
366 env->irq_input_state |= 1 << pin;
367 else
368 env->irq_input_state &= ~(1 << pin);
369 }
370 }
371
372 void ppc40x_irq_init(CPUPPCState *env)
373 {
374 PowerPCCPU *cpu = ppc_env_get_cpu(env);
375
376 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq,
377 cpu, PPC40x_INPUT_NB);
378 }
379
380 /* PowerPC E500 internal IRQ controller */
381 static void ppce500_set_irq(void *opaque, int pin, int level)
382 {
383 PowerPCCPU *cpu = opaque;
384 CPUPPCState *env = &cpu->env;
385 int cur_level;
386
387 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
388 env, pin, level);
389 cur_level = (env->irq_input_state >> pin) & 1;
390 /* Don't generate spurious events */
391 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
392 switch (pin) {
393 case PPCE500_INPUT_MCK:
394 if (level) {
395 LOG_IRQ("%s: reset the PowerPC system\n",
396 __func__);
397 qemu_system_reset_request();
398 }
399 break;
400 case PPCE500_INPUT_RESET_CORE:
401 if (level) {
402 LOG_IRQ("%s: reset the PowerPC core\n", __func__);
403 ppc_set_irq(cpu, PPC_INTERRUPT_MCK, level);
404 }
405 break;
406 case PPCE500_INPUT_CINT:
407 /* Level sensitive - active high */
408 LOG_IRQ("%s: set the critical IRQ state to %d\n",
409 __func__, level);
410 ppc_set_irq(cpu, PPC_INTERRUPT_CEXT, level);
411 break;
412 case PPCE500_INPUT_INT:
413 /* Level sensitive - active high */
414 LOG_IRQ("%s: set the core IRQ state to %d\n",
415 __func__, level);
416 ppc_set_irq(cpu, PPC_INTERRUPT_EXT, level);
417 break;
418 case PPCE500_INPUT_DEBUG:
419 /* Level sensitive - active high */
420 LOG_IRQ("%s: set the debug pin state to %d\n",
421 __func__, level);
422 ppc_set_irq(cpu, PPC_INTERRUPT_DEBUG, level);
423 break;
424 default:
425 /* Unknown pin - do nothing */
426 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
427 return;
428 }
429 if (level)
430 env->irq_input_state |= 1 << pin;
431 else
432 env->irq_input_state &= ~(1 << pin);
433 }
434 }
435
436 void ppce500_irq_init(CPUPPCState *env)
437 {
438 PowerPCCPU *cpu = ppc_env_get_cpu(env);
439
440 env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq,
441 cpu, PPCE500_INPUT_NB);
442 }
443
444 /* Enable or Disable the E500 EPR capability */
445 void ppce500_set_mpic_proxy(bool enabled)
446 {
447 CPUState *cs;
448
449 CPU_FOREACH(cs) {
450 PowerPCCPU *cpu = POWERPC_CPU(cs);
451
452 cpu->env.mpic_proxy = enabled;
453 if (kvm_enabled()) {
454 kvmppc_set_mpic_proxy(cpu, enabled);
455 }
456 }
457 }
458
459 /*****************************************************************************/
460 /* PowerPC time base and decrementer emulation */
461
462 uint64_t cpu_ppc_get_tb(ppc_tb_t *tb_env, uint64_t vmclk, int64_t tb_offset)
463 {
464 /* TB time in tb periods */
465 return muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()) + tb_offset;
466 }
467
468 uint64_t cpu_ppc_load_tbl (CPUPPCState *env)
469 {
470 ppc_tb_t *tb_env = env->tb_env;
471 uint64_t tb;
472
473 if (kvm_enabled()) {
474 return env->spr[SPR_TBL];
475 }
476
477 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset);
478 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
479
480 return tb;
481 }
482
483 static inline uint32_t _cpu_ppc_load_tbu(CPUPPCState *env)
484 {
485 ppc_tb_t *tb_env = env->tb_env;
486 uint64_t tb;
487
488 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset);
489 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
490
491 return tb >> 32;
492 }
493
494 uint32_t cpu_ppc_load_tbu (CPUPPCState *env)
495 {
496 if (kvm_enabled()) {
497 return env->spr[SPR_TBU];
498 }
499
500 return _cpu_ppc_load_tbu(env);
501 }
502
503 static inline void cpu_ppc_store_tb(ppc_tb_t *tb_env, uint64_t vmclk,
504 int64_t *tb_offsetp, uint64_t value)
505 {
506 *tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec());
507 LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n",
508 __func__, value, *tb_offsetp);
509 }
510
511 void cpu_ppc_store_tbl (CPUPPCState *env, uint32_t value)
512 {
513 ppc_tb_t *tb_env = env->tb_env;
514 uint64_t tb;
515
516 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset);
517 tb &= 0xFFFFFFFF00000000ULL;
518 cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
519 &tb_env->tb_offset, tb | (uint64_t)value);
520 }
521
522 static inline void _cpu_ppc_store_tbu(CPUPPCState *env, uint32_t value)
523 {
524 ppc_tb_t *tb_env = env->tb_env;
525 uint64_t tb;
526
527 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->tb_offset);
528 tb &= 0x00000000FFFFFFFFULL;
529 cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
530 &tb_env->tb_offset, ((uint64_t)value << 32) | tb);
531 }
532
533 void cpu_ppc_store_tbu (CPUPPCState *env, uint32_t value)
534 {
535 _cpu_ppc_store_tbu(env, value);
536 }
537
538 uint64_t cpu_ppc_load_atbl (CPUPPCState *env)
539 {
540 ppc_tb_t *tb_env = env->tb_env;
541 uint64_t tb;
542
543 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset);
544 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
545
546 return tb;
547 }
548
549 uint32_t cpu_ppc_load_atbu (CPUPPCState *env)
550 {
551 ppc_tb_t *tb_env = env->tb_env;
552 uint64_t tb;
553
554 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset);
555 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
556
557 return tb >> 32;
558 }
559
560 void cpu_ppc_store_atbl (CPUPPCState *env, uint32_t value)
561 {
562 ppc_tb_t *tb_env = env->tb_env;
563 uint64_t tb;
564
565 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset);
566 tb &= 0xFFFFFFFF00000000ULL;
567 cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
568 &tb_env->atb_offset, tb | (uint64_t)value);
569 }
570
571 void cpu_ppc_store_atbu (CPUPPCState *env, uint32_t value)
572 {
573 ppc_tb_t *tb_env = env->tb_env;
574 uint64_t tb;
575
576 tb = cpu_ppc_get_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL), tb_env->atb_offset);
577 tb &= 0x00000000FFFFFFFFULL;
578 cpu_ppc_store_tb(tb_env, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
579 &tb_env->atb_offset, ((uint64_t)value << 32) | tb);
580 }
581
582 static void cpu_ppc_tb_stop (CPUPPCState *env)
583 {
584 ppc_tb_t *tb_env = env->tb_env;
585 uint64_t tb, atb, vmclk;
586
587 /* If the time base is already frozen, do nothing */
588 if (tb_env->tb_freq != 0) {
589 vmclk = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
590 /* Get the time base */
591 tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset);
592 /* Get the alternate time base */
593 atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset);
594 /* Store the time base value (ie compute the current offset) */
595 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
596 /* Store the alternate time base value (compute the current offset) */
597 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
598 /* Set the time base frequency to zero */
599 tb_env->tb_freq = 0;
600 /* Now, the time bases are frozen to tb_offset / atb_offset value */
601 }
602 }
603
604 static void cpu_ppc_tb_start (CPUPPCState *env)
605 {
606 ppc_tb_t *tb_env = env->tb_env;
607 uint64_t tb, atb, vmclk;
608
609 /* If the time base is not frozen, do nothing */
610 if (tb_env->tb_freq == 0) {
611 vmclk = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
612 /* Get the time base from tb_offset */
613 tb = tb_env->tb_offset;
614 /* Get the alternate time base from atb_offset */
615 atb = tb_env->atb_offset;
616 /* Restore the tb frequency from the decrementer frequency */
617 tb_env->tb_freq = tb_env->decr_freq;
618 /* Store the time base value */
619 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
620 /* Store the alternate time base value */
621 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
622 }
623 }
624
625 bool ppc_decr_clear_on_delivery(CPUPPCState *env)
626 {
627 ppc_tb_t *tb_env = env->tb_env;
628 int flags = PPC_DECR_UNDERFLOW_TRIGGERED | PPC_DECR_UNDERFLOW_LEVEL;
629 return ((tb_env->flags & flags) == PPC_DECR_UNDERFLOW_TRIGGERED);
630 }
631
632 static inline uint32_t _cpu_ppc_load_decr(CPUPPCState *env, uint64_t next)
633 {
634 ppc_tb_t *tb_env = env->tb_env;
635 uint32_t decr;
636 int64_t diff;
637
638 diff = next - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
639 if (diff >= 0) {
640 decr = muldiv64(diff, tb_env->decr_freq, get_ticks_per_sec());
641 } else if (tb_env->flags & PPC_TIMER_BOOKE) {
642 decr = 0;
643 } else {
644 decr = -muldiv64(-diff, tb_env->decr_freq, get_ticks_per_sec());
645 }
646 LOG_TB("%s: %08" PRIx32 "\n", __func__, decr);
647
648 return decr;
649 }
650
651 uint32_t cpu_ppc_load_decr (CPUPPCState *env)
652 {
653 ppc_tb_t *tb_env = env->tb_env;
654
655 if (kvm_enabled()) {
656 return env->spr[SPR_DECR];
657 }
658
659 return _cpu_ppc_load_decr(env, tb_env->decr_next);
660 }
661
662 uint32_t cpu_ppc_load_hdecr (CPUPPCState *env)
663 {
664 ppc_tb_t *tb_env = env->tb_env;
665
666 return _cpu_ppc_load_decr(env, tb_env->hdecr_next);
667 }
668
669 uint64_t cpu_ppc_load_purr (CPUPPCState *env)
670 {
671 ppc_tb_t *tb_env = env->tb_env;
672 uint64_t diff;
673
674 diff = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) - tb_env->purr_start;
675
676 return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, get_ticks_per_sec());
677 }
678
679 /* When decrementer expires,
680 * all we need to do is generate or queue a CPU exception
681 */
682 static inline void cpu_ppc_decr_excp(PowerPCCPU *cpu)
683 {
684 /* Raise it */
685 LOG_TB("raise decrementer exception\n");
686 ppc_set_irq(cpu, PPC_INTERRUPT_DECR, 1);
687 }
688
689 static inline void cpu_ppc_decr_lower(PowerPCCPU *cpu)
690 {
691 ppc_set_irq(cpu, PPC_INTERRUPT_DECR, 0);
692 }
693
694 static inline void cpu_ppc_hdecr_excp(PowerPCCPU *cpu)
695 {
696 /* Raise it */
697 LOG_TB("raise decrementer exception\n");
698 ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1);
699 }
700
701 static inline void cpu_ppc_hdecr_lower(PowerPCCPU *cpu)
702 {
703 ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 0);
704 }
705
706 static void __cpu_ppc_store_decr(PowerPCCPU *cpu, uint64_t *nextp,
707 QEMUTimer *timer,
708 void (*raise_excp)(void *),
709 void (*lower_excp)(PowerPCCPU *),
710 uint32_t decr, uint32_t value)
711 {
712 CPUPPCState *env = &cpu->env;
713 ppc_tb_t *tb_env = env->tb_env;
714 uint64_t now, next;
715
716 LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__,
717 decr, value);
718
719 if (kvm_enabled()) {
720 /* KVM handles decrementer exceptions, we don't need our own timer */
721 return;
722 }
723
724 /*
725 * Going from 2 -> 1, 1 -> 0 or 0 -> -1 is the event to generate a DEC
726 * interrupt.
727 *
728 * If we get a really small DEC value, we can assume that by the time we
729 * handled it we should inject an interrupt already.
730 *
731 * On MSB level based DEC implementations the MSB always means the interrupt
732 * is pending, so raise it on those.
733 *
734 * On MSB edge based DEC implementations the MSB going from 0 -> 1 triggers
735 * an edge interrupt, so raise it here too.
736 */
737 if ((value < 3) ||
738 ((tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL) && (value & 0x80000000)) ||
739 ((tb_env->flags & PPC_DECR_UNDERFLOW_TRIGGERED) && (value & 0x80000000)
740 && !(decr & 0x80000000))) {
741 (*raise_excp)(cpu);
742 return;
743 }
744
745 /* On MSB level based systems a 0 for the MSB stops interrupt delivery */
746 if (!(value & 0x80000000) && (tb_env->flags & PPC_DECR_UNDERFLOW_LEVEL)) {
747 (*lower_excp)(cpu);
748 }
749
750 /* Calculate the next timer event */
751 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
752 next = now + muldiv64(value, get_ticks_per_sec(), tb_env->decr_freq);
753 *nextp = next;
754
755 /* Adjust timer */
756 timer_mod(timer, next);
757 }
758
759 static inline void _cpu_ppc_store_decr(PowerPCCPU *cpu, uint32_t decr,
760 uint32_t value)
761 {
762 ppc_tb_t *tb_env = cpu->env.tb_env;
763
764 __cpu_ppc_store_decr(cpu, &tb_env->decr_next, tb_env->decr_timer,
765 tb_env->decr_timer->cb, &cpu_ppc_decr_lower, decr,
766 value);
767 }
768
769 void cpu_ppc_store_decr (CPUPPCState *env, uint32_t value)
770 {
771 PowerPCCPU *cpu = ppc_env_get_cpu(env);
772
773 _cpu_ppc_store_decr(cpu, cpu_ppc_load_decr(env), value);
774 }
775
776 static void cpu_ppc_decr_cb(void *opaque)
777 {
778 PowerPCCPU *cpu = opaque;
779
780 cpu_ppc_decr_excp(cpu);
781 }
782
783 static inline void _cpu_ppc_store_hdecr(PowerPCCPU *cpu, uint32_t hdecr,
784 uint32_t value)
785 {
786 ppc_tb_t *tb_env = cpu->env.tb_env;
787
788 if (tb_env->hdecr_timer != NULL) {
789 __cpu_ppc_store_decr(cpu, &tb_env->hdecr_next, tb_env->hdecr_timer,
790 tb_env->hdecr_timer->cb, &cpu_ppc_hdecr_lower,
791 hdecr, value);
792 }
793 }
794
795 void cpu_ppc_store_hdecr (CPUPPCState *env, uint32_t value)
796 {
797 PowerPCCPU *cpu = ppc_env_get_cpu(env);
798
799 _cpu_ppc_store_hdecr(cpu, cpu_ppc_load_hdecr(env), value);
800 }
801
802 static void cpu_ppc_hdecr_cb(void *opaque)
803 {
804 PowerPCCPU *cpu = opaque;
805
806 cpu_ppc_hdecr_excp(cpu);
807 }
808
809 static void cpu_ppc_store_purr(PowerPCCPU *cpu, uint64_t value)
810 {
811 ppc_tb_t *tb_env = cpu->env.tb_env;
812
813 tb_env->purr_load = value;
814 tb_env->purr_start = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
815 }
816
817 static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq)
818 {
819 CPUPPCState *env = opaque;
820 PowerPCCPU *cpu = ppc_env_get_cpu(env);
821 ppc_tb_t *tb_env = env->tb_env;
822
823 tb_env->tb_freq = freq;
824 tb_env->decr_freq = freq;
825 /* There is a bug in Linux 2.4 kernels:
826 * if a decrementer exception is pending when it enables msr_ee at startup,
827 * it's not ready to handle it...
828 */
829 _cpu_ppc_store_decr(cpu, 0xFFFFFFFF, 0xFFFFFFFF);
830 _cpu_ppc_store_hdecr(cpu, 0xFFFFFFFF, 0xFFFFFFFF);
831 cpu_ppc_store_purr(cpu, 0x0000000000000000ULL);
832 }
833
834 static void timebase_pre_save(void *opaque)
835 {
836 PPCTimebase *tb = opaque;
837 uint64_t ticks = cpu_get_host_ticks();
838 PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
839
840 if (!first_ppc_cpu->env.tb_env) {
841 error_report("No timebase object");
842 return;
843 }
844
845 tb->time_of_the_day_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST);
846 /*
847 * tb_offset is only expected to be changed by migration so
848 * there is no need to update it from KVM here
849 */
850 tb->guest_timebase = ticks + first_ppc_cpu->env.tb_env->tb_offset;
851 }
852
853 static int timebase_post_load(void *opaque, int version_id)
854 {
855 PPCTimebase *tb_remote = opaque;
856 CPUState *cpu;
857 PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
858 int64_t tb_off_adj, tb_off, ns_diff;
859 int64_t migration_duration_ns, migration_duration_tb, guest_tb, host_ns;
860 unsigned long freq;
861
862 if (!first_ppc_cpu->env.tb_env) {
863 error_report("No timebase object");
864 return -1;
865 }
866
867 freq = first_ppc_cpu->env.tb_env->tb_freq;
868 /*
869 * Calculate timebase on the destination side of migration.
870 * The destination timebase must be not less than the source timebase.
871 * We try to adjust timebase by downtime if host clocks are not
872 * too much out of sync (1 second for now).
873 */
874 host_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST);
875 ns_diff = MAX(0, host_ns - tb_remote->time_of_the_day_ns);
876 migration_duration_ns = MIN(NANOSECONDS_PER_SECOND, ns_diff);
877 migration_duration_tb = muldiv64(migration_duration_ns, freq,
878 NANOSECONDS_PER_SECOND);
879 guest_tb = tb_remote->guest_timebase + MIN(0, migration_duration_tb);
880
881 tb_off_adj = guest_tb - cpu_get_host_ticks();
882
883 tb_off = first_ppc_cpu->env.tb_env->tb_offset;
884 trace_ppc_tb_adjust(tb_off, tb_off_adj, tb_off_adj - tb_off,
885 (tb_off_adj - tb_off) / freq);
886
887 /* Set new offset to all CPUs */
888 CPU_FOREACH(cpu) {
889 PowerPCCPU *pcpu = POWERPC_CPU(cpu);
890 pcpu->env.tb_env->tb_offset = tb_off_adj;
891 }
892
893 return 0;
894 }
895
896 const VMStateDescription vmstate_ppc_timebase = {
897 .name = "timebase",
898 .version_id = 1,
899 .minimum_version_id = 1,
900 .minimum_version_id_old = 1,
901 .pre_save = timebase_pre_save,
902 .post_load = timebase_post_load,
903 .fields = (VMStateField []) {
904 VMSTATE_UINT64(guest_timebase, PPCTimebase),
905 VMSTATE_INT64(time_of_the_day_ns, PPCTimebase),
906 VMSTATE_END_OF_LIST()
907 },
908 };
909
910 /* Set up (once) timebase frequency (in Hz) */
911 clk_setup_cb cpu_ppc_tb_init (CPUPPCState *env, uint32_t freq)
912 {
913 PowerPCCPU *cpu = ppc_env_get_cpu(env);
914 ppc_tb_t *tb_env;
915
916 tb_env = g_malloc0(sizeof(ppc_tb_t));
917 env->tb_env = tb_env;
918 tb_env->flags = PPC_DECR_UNDERFLOW_TRIGGERED;
919 if (env->insns_flags & PPC_SEGMENT_64B) {
920 /* All Book3S 64bit CPUs implement level based DEC logic */
921 tb_env->flags |= PPC_DECR_UNDERFLOW_LEVEL;
922 }
923 /* Create new timer */
924 tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_decr_cb, cpu);
925 if (0) {
926 /* XXX: find a suitable condition to enable the hypervisor decrementer
927 */
928 tb_env->hdecr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_hdecr_cb,
929 cpu);
930 } else {
931 tb_env->hdecr_timer = NULL;
932 }
933 cpu_ppc_set_tb_clk(env, freq);
934
935 return &cpu_ppc_set_tb_clk;
936 }
937
938 /* Specific helpers for POWER & PowerPC 601 RTC */
939 #if 0
940 static clk_setup_cb cpu_ppc601_rtc_init (CPUPPCState *env)
941 {
942 return cpu_ppc_tb_init(env, 7812500);
943 }
944 #endif
945
946 void cpu_ppc601_store_rtcu (CPUPPCState *env, uint32_t value)
947 {
948 _cpu_ppc_store_tbu(env, value);
949 }
950
951 uint32_t cpu_ppc601_load_rtcu (CPUPPCState *env)
952 {
953 return _cpu_ppc_load_tbu(env);
954 }
955
956 void cpu_ppc601_store_rtcl (CPUPPCState *env, uint32_t value)
957 {
958 cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
959 }
960
961 uint32_t cpu_ppc601_load_rtcl (CPUPPCState *env)
962 {
963 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
964 }
965
966 /*****************************************************************************/
967 /* PowerPC 40x timers */
968
969 /* PIT, FIT & WDT */
970 typedef struct ppc40x_timer_t ppc40x_timer_t;
971 struct ppc40x_timer_t {
972 uint64_t pit_reload; /* PIT auto-reload value */
973 uint64_t fit_next; /* Tick for next FIT interrupt */
974 QEMUTimer *fit_timer;
975 uint64_t wdt_next; /* Tick for next WDT interrupt */
976 QEMUTimer *wdt_timer;
977
978 /* 405 have the PIT, 440 have a DECR. */
979 unsigned int decr_excp;
980 };
981
982 /* Fixed interval timer */
983 static void cpu_4xx_fit_cb (void *opaque)
984 {
985 PowerPCCPU *cpu;
986 CPUPPCState *env;
987 ppc_tb_t *tb_env;
988 ppc40x_timer_t *ppc40x_timer;
989 uint64_t now, next;
990
991 env = opaque;
992 cpu = ppc_env_get_cpu(env);
993 tb_env = env->tb_env;
994 ppc40x_timer = tb_env->opaque;
995 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
996 switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) {
997 case 0:
998 next = 1 << 9;
999 break;
1000 case 1:
1001 next = 1 << 13;
1002 break;
1003 case 2:
1004 next = 1 << 17;
1005 break;
1006 case 3:
1007 next = 1 << 21;
1008 break;
1009 default:
1010 /* Cannot occur, but makes gcc happy */
1011 return;
1012 }
1013 next = now + muldiv64(next, get_ticks_per_sec(), tb_env->tb_freq);
1014 if (next == now)
1015 next++;
1016 timer_mod(ppc40x_timer->fit_timer, next);
1017 env->spr[SPR_40x_TSR] |= 1 << 26;
1018 if ((env->spr[SPR_40x_TCR] >> 23) & 0x1) {
1019 ppc_set_irq(cpu, PPC_INTERRUPT_FIT, 1);
1020 }
1021 LOG_TB("%s: ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__,
1022 (int)((env->spr[SPR_40x_TCR] >> 23) & 0x1),
1023 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
1024 }
1025
1026 /* Programmable interval timer */
1027 static void start_stop_pit (CPUPPCState *env, ppc_tb_t *tb_env, int is_excp)
1028 {
1029 ppc40x_timer_t *ppc40x_timer;
1030 uint64_t now, next;
1031
1032 ppc40x_timer = tb_env->opaque;
1033 if (ppc40x_timer->pit_reload <= 1 ||
1034 !((env->spr[SPR_40x_TCR] >> 26) & 0x1) ||
1035 (is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) {
1036 /* Stop PIT */
1037 LOG_TB("%s: stop PIT\n", __func__);
1038 timer_del(tb_env->decr_timer);
1039 } else {
1040 LOG_TB("%s: start PIT %016" PRIx64 "\n",
1041 __func__, ppc40x_timer->pit_reload);
1042 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1043 next = now + muldiv64(ppc40x_timer->pit_reload,
1044 get_ticks_per_sec(), tb_env->decr_freq);
1045 if (is_excp)
1046 next += tb_env->decr_next - now;
1047 if (next == now)
1048 next++;
1049 timer_mod(tb_env->decr_timer, next);
1050 tb_env->decr_next = next;
1051 }
1052 }
1053
1054 static void cpu_4xx_pit_cb (void *opaque)
1055 {
1056 PowerPCCPU *cpu;
1057 CPUPPCState *env;
1058 ppc_tb_t *tb_env;
1059 ppc40x_timer_t *ppc40x_timer;
1060
1061 env = opaque;
1062 cpu = ppc_env_get_cpu(env);
1063 tb_env = env->tb_env;
1064 ppc40x_timer = tb_env->opaque;
1065 env->spr[SPR_40x_TSR] |= 1 << 27;
1066 if ((env->spr[SPR_40x_TCR] >> 26) & 0x1) {
1067 ppc_set_irq(cpu, ppc40x_timer->decr_excp, 1);
1068 }
1069 start_stop_pit(env, tb_env, 1);
1070 LOG_TB("%s: ar %d ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx " "
1071 "%016" PRIx64 "\n", __func__,
1072 (int)((env->spr[SPR_40x_TCR] >> 22) & 0x1),
1073 (int)((env->spr[SPR_40x_TCR] >> 26) & 0x1),
1074 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR],
1075 ppc40x_timer->pit_reload);
1076 }
1077
1078 /* Watchdog timer */
1079 static void cpu_4xx_wdt_cb (void *opaque)
1080 {
1081 PowerPCCPU *cpu;
1082 CPUPPCState *env;
1083 ppc_tb_t *tb_env;
1084 ppc40x_timer_t *ppc40x_timer;
1085 uint64_t now, next;
1086
1087 env = opaque;
1088 cpu = ppc_env_get_cpu(env);
1089 tb_env = env->tb_env;
1090 ppc40x_timer = tb_env->opaque;
1091 now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1092 switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) {
1093 case 0:
1094 next = 1 << 17;
1095 break;
1096 case 1:
1097 next = 1 << 21;
1098 break;
1099 case 2:
1100 next = 1 << 25;
1101 break;
1102 case 3:
1103 next = 1 << 29;
1104 break;
1105 default:
1106 /* Cannot occur, but makes gcc happy */
1107 return;
1108 }
1109 next = now + muldiv64(next, get_ticks_per_sec(), tb_env->decr_freq);
1110 if (next == now)
1111 next++;
1112 LOG_TB("%s: TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__,
1113 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
1114 switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) {
1115 case 0x0:
1116 case 0x1:
1117 timer_mod(ppc40x_timer->wdt_timer, next);
1118 ppc40x_timer->wdt_next = next;
1119 env->spr[SPR_40x_TSR] |= 1U << 31;
1120 break;
1121 case 0x2:
1122 timer_mod(ppc40x_timer->wdt_timer, next);
1123 ppc40x_timer->wdt_next = next;
1124 env->spr[SPR_40x_TSR] |= 1 << 30;
1125 if ((env->spr[SPR_40x_TCR] >> 27) & 0x1) {
1126 ppc_set_irq(cpu, PPC_INTERRUPT_WDT, 1);
1127 }
1128 break;
1129 case 0x3:
1130 env->spr[SPR_40x_TSR] &= ~0x30000000;
1131 env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
1132 switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) {
1133 case 0x0:
1134 /* No reset */
1135 break;
1136 case 0x1: /* Core reset */
1137 ppc40x_core_reset(cpu);
1138 break;
1139 case 0x2: /* Chip reset */
1140 ppc40x_chip_reset(cpu);
1141 break;
1142 case 0x3: /* System reset */
1143 ppc40x_system_reset(cpu);
1144 break;
1145 }
1146 }
1147 }
1148
1149 void store_40x_pit (CPUPPCState *env, target_ulong val)
1150 {
1151 ppc_tb_t *tb_env;
1152 ppc40x_timer_t *ppc40x_timer;
1153
1154 tb_env = env->tb_env;
1155 ppc40x_timer = tb_env->opaque;
1156 LOG_TB("%s val" TARGET_FMT_lx "\n", __func__, val);
1157 ppc40x_timer->pit_reload = val;
1158 start_stop_pit(env, tb_env, 0);
1159 }
1160
1161 target_ulong load_40x_pit (CPUPPCState *env)
1162 {
1163 return cpu_ppc_load_decr(env);
1164 }
1165
1166 static void ppc_40x_set_tb_clk (void *opaque, uint32_t freq)
1167 {
1168 CPUPPCState *env = opaque;
1169 ppc_tb_t *tb_env = env->tb_env;
1170
1171 LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__,
1172 freq);
1173 tb_env->tb_freq = freq;
1174 tb_env->decr_freq = freq;
1175 /* XXX: we should also update all timers */
1176 }
1177
1178 clk_setup_cb ppc_40x_timers_init (CPUPPCState *env, uint32_t freq,
1179 unsigned int decr_excp)
1180 {
1181 ppc_tb_t *tb_env;
1182 ppc40x_timer_t *ppc40x_timer;
1183
1184 tb_env = g_malloc0(sizeof(ppc_tb_t));
1185 env->tb_env = tb_env;
1186 tb_env->flags = PPC_DECR_UNDERFLOW_TRIGGERED;
1187 ppc40x_timer = g_malloc0(sizeof(ppc40x_timer_t));
1188 tb_env->tb_freq = freq;
1189 tb_env->decr_freq = freq;
1190 tb_env->opaque = ppc40x_timer;
1191 LOG_TB("%s freq %" PRIu32 "\n", __func__, freq);
1192 if (ppc40x_timer != NULL) {
1193 /* We use decr timer for PIT */
1194 tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_pit_cb, env);
1195 ppc40x_timer->fit_timer =
1196 timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_fit_cb, env);
1197 ppc40x_timer->wdt_timer =
1198 timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_4xx_wdt_cb, env);
1199 ppc40x_timer->decr_excp = decr_excp;
1200 }
1201
1202 return &ppc_40x_set_tb_clk;
1203 }
1204
1205 /*****************************************************************************/
1206 /* Embedded PowerPC Device Control Registers */
1207 typedef struct ppc_dcrn_t ppc_dcrn_t;
1208 struct ppc_dcrn_t {
1209 dcr_read_cb dcr_read;
1210 dcr_write_cb dcr_write;
1211 void *opaque;
1212 };
1213
1214 /* XXX: on 460, DCR addresses are 32 bits wide,
1215 * using DCRIPR to get the 22 upper bits of the DCR address
1216 */
1217 #define DCRN_NB 1024
1218 struct ppc_dcr_t {
1219 ppc_dcrn_t dcrn[DCRN_NB];
1220 int (*read_error)(int dcrn);
1221 int (*write_error)(int dcrn);
1222 };
1223
1224 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp)
1225 {
1226 ppc_dcrn_t *dcr;
1227
1228 if (dcrn < 0 || dcrn >= DCRN_NB)
1229 goto error;
1230 dcr = &dcr_env->dcrn[dcrn];
1231 if (dcr->dcr_read == NULL)
1232 goto error;
1233 *valp = (*dcr->dcr_read)(dcr->opaque, dcrn);
1234
1235 return 0;
1236
1237 error:
1238 if (dcr_env->read_error != NULL)
1239 return (*dcr_env->read_error)(dcrn);
1240
1241 return -1;
1242 }
1243
1244 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val)
1245 {
1246 ppc_dcrn_t *dcr;
1247
1248 if (dcrn < 0 || dcrn >= DCRN_NB)
1249 goto error;
1250 dcr = &dcr_env->dcrn[dcrn];
1251 if (dcr->dcr_write == NULL)
1252 goto error;
1253 (*dcr->dcr_write)(dcr->opaque, dcrn, val);
1254
1255 return 0;
1256
1257 error:
1258 if (dcr_env->write_error != NULL)
1259 return (*dcr_env->write_error)(dcrn);
1260
1261 return -1;
1262 }
1263
1264 int ppc_dcr_register (CPUPPCState *env, int dcrn, void *opaque,
1265 dcr_read_cb dcr_read, dcr_write_cb dcr_write)
1266 {
1267 ppc_dcr_t *dcr_env;
1268 ppc_dcrn_t *dcr;
1269
1270 dcr_env = env->dcr_env;
1271 if (dcr_env == NULL)
1272 return -1;
1273 if (dcrn < 0 || dcrn >= DCRN_NB)
1274 return -1;
1275 dcr = &dcr_env->dcrn[dcrn];
1276 if (dcr->opaque != NULL ||
1277 dcr->dcr_read != NULL ||
1278 dcr->dcr_write != NULL)
1279 return -1;
1280 dcr->opaque = opaque;
1281 dcr->dcr_read = dcr_read;
1282 dcr->dcr_write = dcr_write;
1283
1284 return 0;
1285 }
1286
1287 int ppc_dcr_init (CPUPPCState *env, int (*read_error)(int dcrn),
1288 int (*write_error)(int dcrn))
1289 {
1290 ppc_dcr_t *dcr_env;
1291
1292 dcr_env = g_malloc0(sizeof(ppc_dcr_t));
1293 dcr_env->read_error = read_error;
1294 dcr_env->write_error = write_error;
1295 env->dcr_env = dcr_env;
1296
1297 return 0;
1298 }
1299
1300 /*****************************************************************************/
1301 /* Debug port */
1302 void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
1303 {
1304 addr &= 0xF;
1305 switch (addr) {
1306 case 0:
1307 printf("%c", val);
1308 break;
1309 case 1:
1310 printf("\n");
1311 fflush(stdout);
1312 break;
1313 case 2:
1314 printf("Set loglevel to %04" PRIx32 "\n", val);
1315 qemu_set_log(val | 0x100);
1316 break;
1317 }
1318 }
1319
1320 /* CPU device-tree ID helpers */
1321 int ppc_get_vcpu_dt_id(PowerPCCPU *cpu)
1322 {
1323 return cpu->cpu_dt_id;
1324 }
1325
1326 PowerPCCPU *ppc_get_vcpu_by_dt_id(int cpu_dt_id)
1327 {
1328 CPUState *cs;
1329
1330 CPU_FOREACH(cs) {
1331 PowerPCCPU *cpu = POWERPC_CPU(cs);
1332
1333 if (cpu->cpu_dt_id == cpu_dt_id) {
1334 return cpu;
1335 }
1336 }
1337
1338 return NULL;
1339 }
QEmu