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kvm: configure: if all else fails, really infer kernel version from .config
[qemu-kvm/fedora.git] / hw / ppc.c
blob05e787f0407b33c76d95dd877a18c9f8dd5b3eb9
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.h"
25 #include "ppc.h"
26 #include "qemu-timer.h"
27 #include "sysemu.h"
28 #include "nvram.h"
29 #include "qemu-log.h"
30
31 //#define PPC_DEBUG_IRQ
32 //#define PPC_DEBUG_TB
33
34 #ifdef PPC_DEBUG_IRQ
35 # define LOG_IRQ(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__)
36 #else
37 # define LOG_IRQ(...) do { } while (0)
38 #endif
39
40
41 #ifdef PPC_DEBUG_TB
42 # define LOG_TB(...) qemu_log(__VA_ARGS__)
43 #else
44 # define LOG_TB(...) do { } while (0)
45 #endif
46
47 static void cpu_ppc_tb_stop (CPUState *env);
48 static void cpu_ppc_tb_start (CPUState *env);
49
50 static void ppc_set_irq (CPUState *env, int n_IRQ, int level)
51 {
52 if (level) {
53 env->pending_interrupts |= 1 << n_IRQ;
54 cpu_interrupt(env, CPU_INTERRUPT_HARD);
55 } else {
56 env->pending_interrupts &= ~(1 << n_IRQ);
57 if (env->pending_interrupts == 0)
58 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
59 }
60 LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32
61 "req %08x\n", __func__, env, n_IRQ, level,
62 env->pending_interrupts, env->interrupt_request);
63 }
64
65 /* PowerPC 6xx / 7xx internal IRQ controller */
66 static void ppc6xx_set_irq (void *opaque, int pin, int level)
67 {
68 CPUState *env = opaque;
69 int cur_level;
70
71 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
72 env, pin, level);
73 cur_level = (env->irq_input_state >> pin) & 1;
74 /* Don't generate spurious events */
75 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
76 switch (pin) {
77 case PPC6xx_INPUT_TBEN:
78 /* Level sensitive - active high */
79 LOG_IRQ("%s: %s the time base\n",
80 __func__, level ? "start" : "stop");
81 if (level) {
82 cpu_ppc_tb_start(env);
83 } else {
84 cpu_ppc_tb_stop(env);
85 }
86 case PPC6xx_INPUT_INT:
87 /* Level sensitive - active high */
88 LOG_IRQ("%s: set the external IRQ state to %d\n",
89 __func__, level);
90 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
91 break;
92 case PPC6xx_INPUT_SMI:
93 /* Level sensitive - active high */
94 LOG_IRQ("%s: set the SMI IRQ state to %d\n",
95 __func__, level);
96 ppc_set_irq(env, PPC_INTERRUPT_SMI, level);
97 break;
98 case PPC6xx_INPUT_MCP:
99 /* Negative edge sensitive */
100 /* XXX: TODO: actual reaction may depends on HID0 status
101 * 603/604/740/750: check HID0[EMCP]
102 */
103 if (cur_level == 1 && level == 0) {
104 LOG_IRQ("%s: raise machine check state\n",
105 __func__);
106 ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
107 }
108 break;
109 case PPC6xx_INPUT_CKSTP_IN:
110 /* Level sensitive - active low */
111 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
112 /* XXX: Note that the only way to restart the CPU is to reset it */
113 if (level) {
114 LOG_IRQ("%s: stop the CPU\n", __func__);
115 env->halted = 1;
116 }
117 break;
118 case PPC6xx_INPUT_HRESET:
119 /* Level sensitive - active low */
120 if (level) {
121 LOG_IRQ("%s: reset the CPU\n", __func__);
122 env->interrupt_request |= CPU_INTERRUPT_EXITTB;
123 /* XXX: TOFIX */
124 #if 0
125 cpu_ppc_reset(env);
126 #else
127 qemu_system_reset_request();
128 #endif
129 }
130 break;
131 case PPC6xx_INPUT_SRESET:
132 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
133 __func__, level);
134 ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
135 break;
136 default:
137 /* Unknown pin - do nothing */
138 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
139 return;
140 }
141 if (level)
142 env->irq_input_state |= 1 << pin;
143 else
144 env->irq_input_state &= ~(1 << pin);
145 }
146 }
147
148 void ppc6xx_irq_init (CPUState *env)
149 {
150 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, env,
151 PPC6xx_INPUT_NB);
152 }
153
154 #if defined(TARGET_PPC64)
155 /* PowerPC 970 internal IRQ controller */
156 static void ppc970_set_irq (void *opaque, int pin, int level)
157 {
158 CPUState *env = opaque;
159 int cur_level;
160
161 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
162 env, pin, level);
163 cur_level = (env->irq_input_state >> pin) & 1;
164 /* Don't generate spurious events */
165 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
166 switch (pin) {
167 case PPC970_INPUT_INT:
168 /* Level sensitive - active high */
169 LOG_IRQ("%s: set the external IRQ state to %d\n",
170 __func__, level);
171 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
172 break;
173 case PPC970_INPUT_THINT:
174 /* Level sensitive - active high */
175 LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__,
176 level);
177 ppc_set_irq(env, PPC_INTERRUPT_THERM, level);
178 break;
179 case PPC970_INPUT_MCP:
180 /* Negative edge sensitive */
181 /* XXX: TODO: actual reaction may depends on HID0 status
182 * 603/604/740/750: check HID0[EMCP]
183 */
184 if (cur_level == 1 && level == 0) {
185 LOG_IRQ("%s: raise machine check state\n",
186 __func__);
187 ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
188 }
189 break;
190 case PPC970_INPUT_CKSTP:
191 /* Level sensitive - active low */
192 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
193 if (level) {
194 LOG_IRQ("%s: stop the CPU\n", __func__);
195 env->halted = 1;
196 } else {
197 LOG_IRQ("%s: restart the CPU\n", __func__);
198 env->halted = 0;
199 }
200 break;
201 case PPC970_INPUT_HRESET:
202 /* Level sensitive - active low */
203 if (level) {
204 #if 0 // XXX: TOFIX
205 LOG_IRQ("%s: reset the CPU\n", __func__);
206 cpu_reset(env);
207 #endif
208 }
209 break;
210 case PPC970_INPUT_SRESET:
211 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
212 __func__, level);
213 ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
214 break;
215 case PPC970_INPUT_TBEN:
216 LOG_IRQ("%s: set the TBEN state to %d\n", __func__,
217 level);
218 /* XXX: TODO */
219 break;
220 default:
221 /* Unknown pin - do nothing */
222 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
223 return;
224 }
225 if (level)
226 env->irq_input_state |= 1 << pin;
227 else
228 env->irq_input_state &= ~(1 << pin);
229 }
230 }
231
232 void ppc970_irq_init (CPUState *env)
233 {
234 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, env,
235 PPC970_INPUT_NB);
236 }
237 #endif /* defined(TARGET_PPC64) */
238
239 /* PowerPC 40x internal IRQ controller */
240 static void ppc40x_set_irq (void *opaque, int pin, int level)
241 {
242 CPUState *env = opaque;
243 int cur_level;
244
245 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
246 env, pin, level);
247 cur_level = (env->irq_input_state >> pin) & 1;
248 /* Don't generate spurious events */
249 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
250 switch (pin) {
251 case PPC40x_INPUT_RESET_SYS:
252 if (level) {
253 LOG_IRQ("%s: reset the PowerPC system\n",
254 __func__);
255 ppc40x_system_reset(env);
256 }
257 break;
258 case PPC40x_INPUT_RESET_CHIP:
259 if (level) {
260 LOG_IRQ("%s: reset the PowerPC chip\n", __func__);
261 ppc40x_chip_reset(env);
262 }
263 break;
264 case PPC40x_INPUT_RESET_CORE:
265 /* XXX: TODO: update DBSR[MRR] */
266 if (level) {
267 LOG_IRQ("%s: reset the PowerPC core\n", __func__);
268 ppc40x_core_reset(env);
269 }
270 break;
271 case PPC40x_INPUT_CINT:
272 /* Level sensitive - active high */
273 LOG_IRQ("%s: set the critical IRQ state to %d\n",
274 __func__, level);
275 ppc_set_irq(env, PPC_INTERRUPT_CEXT, level);
276 break;
277 case PPC40x_INPUT_INT:
278 /* Level sensitive - active high */
279 LOG_IRQ("%s: set the external IRQ state to %d\n",
280 __func__, level);
281 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
282 break;
283 case PPC40x_INPUT_HALT:
284 /* Level sensitive - active low */
285 if (level) {
286 LOG_IRQ("%s: stop the CPU\n", __func__);
287 env->halted = 1;
288 } else {
289 LOG_IRQ("%s: restart the CPU\n", __func__);
290 env->halted = 0;
291 }
292 break;
293 case PPC40x_INPUT_DEBUG:
294 /* Level sensitive - active high */
295 LOG_IRQ("%s: set the debug pin state to %d\n",
296 __func__, level);
297 ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level);
298 break;
299 default:
300 /* Unknown pin - do nothing */
301 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
302 return;
303 }
304 if (level)
305 env->irq_input_state |= 1 << pin;
306 else
307 env->irq_input_state &= ~(1 << pin);
308 }
309 }
310
311 void ppc40x_irq_init (CPUState *env)
312 {
313 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq,
314 env, PPC40x_INPUT_NB);
315 }
316
317 /*****************************************************************************/
318 /* PowerPC time base and decrementer emulation */
319 struct ppc_tb_t {
320 /* Time base management */
321 int64_t tb_offset; /* Compensation */
322 int64_t atb_offset; /* Compensation */
323 uint32_t tb_freq; /* TB frequency */
324 /* Decrementer management */
325 uint64_t decr_next; /* Tick for next decr interrupt */
326 uint32_t decr_freq; /* decrementer frequency */
327 struct QEMUTimer *decr_timer;
328 /* Hypervisor decrementer management */
329 uint64_t hdecr_next; /* Tick for next hdecr interrupt */
330 struct QEMUTimer *hdecr_timer;
331 uint64_t purr_load;
332 uint64_t purr_start;
333 void *opaque;
334 };
335
336 static always_inline uint64_t cpu_ppc_get_tb (ppc_tb_t *tb_env, uint64_t vmclk,
337 int64_t tb_offset)
338 {
339 /* TB time in tb periods */
340 return muldiv64(vmclk, tb_env->tb_freq, ticks_per_sec) + tb_offset;
341 }
342
343 uint32_t cpu_ppc_load_tbl (CPUState *env)
344 {
345 ppc_tb_t *tb_env = env->tb_env;
346 uint64_t tb;
347
348 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
349 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
350
351 return tb & 0xFFFFFFFF;
352 }
353
354 static always_inline uint32_t _cpu_ppc_load_tbu (CPUState *env)
355 {
356 ppc_tb_t *tb_env = env->tb_env;
357 uint64_t tb;
358
359 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
360 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
361
362 return tb >> 32;
363 }
364
365 uint32_t cpu_ppc_load_tbu (CPUState *env)
366 {
367 return _cpu_ppc_load_tbu(env);
368 }
369
370 static always_inline void cpu_ppc_store_tb (ppc_tb_t *tb_env, uint64_t vmclk,
371 int64_t *tb_offsetp,
372 uint64_t value)
373 {
374 *tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, ticks_per_sec);
375 LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n",
376 __func__, value, *tb_offsetp);
377 }
378
379 void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
380 {
381 ppc_tb_t *tb_env = env->tb_env;
382 uint64_t tb;
383
384 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
385 tb &= 0xFFFFFFFF00000000ULL;
386 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
387 &tb_env->tb_offset, tb | (uint64_t)value);
388 }
389
390 static always_inline void _cpu_ppc_store_tbu (CPUState *env, uint32_t value)
391 {
392 ppc_tb_t *tb_env = env->tb_env;
393 uint64_t tb;
394
395 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->tb_offset);
396 tb &= 0x00000000FFFFFFFFULL;
397 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
398 &tb_env->tb_offset, ((uint64_t)value << 32) | tb);
399 }
400
401 void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
402 {
403 _cpu_ppc_store_tbu(env, value);
404 }
405
406 uint32_t cpu_ppc_load_atbl (CPUState *env)
407 {
408 ppc_tb_t *tb_env = env->tb_env;
409 uint64_t tb;
410
411 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
412 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
413
414 return tb & 0xFFFFFFFF;
415 }
416
417 uint32_t cpu_ppc_load_atbu (CPUState *env)
418 {
419 ppc_tb_t *tb_env = env->tb_env;
420 uint64_t tb;
421
422 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
423 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
424
425 return tb >> 32;
426 }
427
428 void cpu_ppc_store_atbl (CPUState *env, uint32_t value)
429 {
430 ppc_tb_t *tb_env = env->tb_env;
431 uint64_t tb;
432
433 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
434 tb &= 0xFFFFFFFF00000000ULL;
435 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
436 &tb_env->atb_offset, tb | (uint64_t)value);
437 }
438
439 void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
440 {
441 ppc_tb_t *tb_env = env->tb_env;
442 uint64_t tb;
443
444 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock(vm_clock), tb_env->atb_offset);
445 tb &= 0x00000000FFFFFFFFULL;
446 cpu_ppc_store_tb(tb_env, qemu_get_clock(vm_clock),
447 &tb_env->atb_offset, ((uint64_t)value << 32) | tb);
448 }
449
450 static void cpu_ppc_tb_stop (CPUState *env)
451 {
452 ppc_tb_t *tb_env = env->tb_env;
453 uint64_t tb, atb, vmclk;
454
455 /* If the time base is already frozen, do nothing */
456 if (tb_env->tb_freq != 0) {
457 vmclk = qemu_get_clock(vm_clock);
458 /* Get the time base */
459 tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset);
460 /* Get the alternate time base */
461 atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset);
462 /* Store the time base value (ie compute the current offset) */
463 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
464 /* Store the alternate time base value (compute the current offset) */
465 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
466 /* Set the time base frequency to zero */
467 tb_env->tb_freq = 0;
468 /* Now, the time bases are frozen to tb_offset / atb_offset value */
469 }
470 }
471
472 static void cpu_ppc_tb_start (CPUState *env)
473 {
474 ppc_tb_t *tb_env = env->tb_env;
475 uint64_t tb, atb, vmclk;
476
477 /* If the time base is not frozen, do nothing */
478 if (tb_env->tb_freq == 0) {
479 vmclk = qemu_get_clock(vm_clock);
480 /* Get the time base from tb_offset */
481 tb = tb_env->tb_offset;
482 /* Get the alternate time base from atb_offset */
483 atb = tb_env->atb_offset;
484 /* Restore the tb frequency from the decrementer frequency */
485 tb_env->tb_freq = tb_env->decr_freq;
486 /* Store the time base value */
487 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
488 /* Store the alternate time base value */
489 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
490 }
491 }
492
493 static always_inline uint32_t _cpu_ppc_load_decr (CPUState *env,
494 uint64_t *next)
495 {
496 ppc_tb_t *tb_env = env->tb_env;
497 uint32_t decr;
498 int64_t diff;
499
500 diff = tb_env->decr_next - qemu_get_clock(vm_clock);
501 if (diff >= 0)
502 decr = muldiv64(diff, tb_env->decr_freq, ticks_per_sec);
503 else
504 decr = -muldiv64(-diff, tb_env->decr_freq, ticks_per_sec);
505 LOG_TB("%s: %08" PRIx32 "\n", __func__, decr);
506
507 return decr;
508 }
509
510 uint32_t cpu_ppc_load_decr (CPUState *env)
511 {
512 ppc_tb_t *tb_env = env->tb_env;
513
514 return _cpu_ppc_load_decr(env, &tb_env->decr_next);
515 }
516
517 uint32_t cpu_ppc_load_hdecr (CPUState *env)
518 {
519 ppc_tb_t *tb_env = env->tb_env;
520
521 return _cpu_ppc_load_decr(env, &tb_env->hdecr_next);
522 }
523
524 uint64_t cpu_ppc_load_purr (CPUState *env)
525 {
526 ppc_tb_t *tb_env = env->tb_env;
527 uint64_t diff;
528
529 diff = qemu_get_clock(vm_clock) - tb_env->purr_start;
530
531 return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, ticks_per_sec);
532 }
533
534 /* When decrementer expires,
535 * all we need to do is generate or queue a CPU exception
536 */
537 static always_inline void cpu_ppc_decr_excp (CPUState *env)
538 {
539 /* Raise it */
540 LOG_TB("raise decrementer exception\n");
541 ppc_set_irq(env, PPC_INTERRUPT_DECR, 1);
542 }
543
544 static always_inline void cpu_ppc_hdecr_excp (CPUState *env)
545 {
546 /* Raise it */
547 LOG_TB("raise decrementer exception\n");
548 ppc_set_irq(env, PPC_INTERRUPT_HDECR, 1);
549 }
550
551 static void __cpu_ppc_store_decr (CPUState *env, uint64_t *nextp,
552 struct QEMUTimer *timer,
553 void (*raise_excp)(CPUState *),
554 uint32_t decr, uint32_t value,
555 int is_excp)
556 {
557 ppc_tb_t *tb_env = env->tb_env;
558 uint64_t now, next;
559
560 LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__,
561 decr, value);
562 now = qemu_get_clock(vm_clock);
563 next = now + muldiv64(value, ticks_per_sec, tb_env->decr_freq);
564 if (is_excp)
565 next += *nextp - now;
566 if (next == now)
567 next++;
568 *nextp = next;
569 /* Adjust timer */
570 qemu_mod_timer(timer, next);
571 /* If we set a negative value and the decrementer was positive,
572 * raise an exception.
573 */
574 if ((value & 0x80000000) && !(decr & 0x80000000))
575 (*raise_excp)(env);
576 }
577
578 static always_inline void _cpu_ppc_store_decr (CPUState *env, uint32_t decr,
579 uint32_t value, int is_excp)
580 {
581 ppc_tb_t *tb_env = env->tb_env;
582
583 __cpu_ppc_store_decr(env, &tb_env->decr_next, tb_env->decr_timer,
584 &cpu_ppc_decr_excp, decr, value, is_excp);
585 }
586
587 void cpu_ppc_store_decr (CPUState *env, uint32_t value)
588 {
589 _cpu_ppc_store_decr(env, cpu_ppc_load_decr(env), value, 0);
590 }
591
592 static void cpu_ppc_decr_cb (void *opaque)
593 {
594 _cpu_ppc_store_decr(opaque, 0x00000000, 0xFFFFFFFF, 1);
595 }
596
597 static always_inline void _cpu_ppc_store_hdecr (CPUState *env, uint32_t hdecr,
598 uint32_t value, int is_excp)
599 {
600 ppc_tb_t *tb_env = env->tb_env;
601
602 if (tb_env->hdecr_timer != NULL) {
603 __cpu_ppc_store_decr(env, &tb_env->hdecr_next, tb_env->hdecr_timer,
604 &cpu_ppc_hdecr_excp, hdecr, value, is_excp);
605 }
606 }
607
608 void cpu_ppc_store_hdecr (CPUState *env, uint32_t value)
609 {
610 _cpu_ppc_store_hdecr(env, cpu_ppc_load_hdecr(env), value, 0);
611 }
612
613 static void cpu_ppc_hdecr_cb (void *opaque)
614 {
615 _cpu_ppc_store_hdecr(opaque, 0x00000000, 0xFFFFFFFF, 1);
616 }
617
618 void cpu_ppc_store_purr (CPUState *env, uint64_t value)
619 {
620 ppc_tb_t *tb_env = env->tb_env;
621
622 tb_env->purr_load = value;
623 tb_env->purr_start = qemu_get_clock(vm_clock);
624 }
625
626 static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq)
627 {
628 CPUState *env = opaque;
629 ppc_tb_t *tb_env = env->tb_env;
630
631 tb_env->tb_freq = freq;
632 tb_env->decr_freq = freq;
633 /* There is a bug in Linux 2.4 kernels:
634 * if a decrementer exception is pending when it enables msr_ee at startup,
635 * it's not ready to handle it...
636 */
637 _cpu_ppc_store_decr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
638 _cpu_ppc_store_hdecr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
639 cpu_ppc_store_purr(env, 0x0000000000000000ULL);
640 }
641
642 /* Set up (once) timebase frequency (in Hz) */
643 clk_setup_cb cpu_ppc_tb_init (CPUState *env, uint32_t freq)
644 {
645 ppc_tb_t *tb_env;
646
647 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
648 if (tb_env == NULL)
649 return NULL;
650 env->tb_env = tb_env;
651 /* Create new timer */
652 tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_ppc_decr_cb, env);
653 if (0) {
654 /* XXX: find a suitable condition to enable the hypervisor decrementer
655 */
656 tb_env->hdecr_timer = qemu_new_timer(vm_clock, &cpu_ppc_hdecr_cb, env);
657 } else {
658 tb_env->hdecr_timer = NULL;
659 }
660 cpu_ppc_set_tb_clk(env, freq);
661
662 return &cpu_ppc_set_tb_clk;
663 }
664
665 /* Specific helpers for POWER & PowerPC 601 RTC */
666 #if 0
667 static clk_setup_cb cpu_ppc601_rtc_init (CPUState *env)
668 {
669 return cpu_ppc_tb_init(env, 7812500);
670 }
671 #endif
672
673 void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
674 {
675 _cpu_ppc_store_tbu(env, value);
676 }
677
678 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
679 {
680 return _cpu_ppc_load_tbu(env);
681 }
682
683 void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value)
684 {
685 cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
686 }
687
688 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
689 {
690 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
691 }
692
693 /*****************************************************************************/
694 /* Embedded PowerPC timers */
695
696 /* PIT, FIT & WDT */
697 typedef struct ppcemb_timer_t ppcemb_timer_t;
698 struct ppcemb_timer_t {
699 uint64_t pit_reload; /* PIT auto-reload value */
700 uint64_t fit_next; /* Tick for next FIT interrupt */
701 struct QEMUTimer *fit_timer;
702 uint64_t wdt_next; /* Tick for next WDT interrupt */
703 struct QEMUTimer *wdt_timer;
704 };
705
706 /* Fixed interval timer */
707 static void cpu_4xx_fit_cb (void *opaque)
708 {
709 CPUState *env;
710 ppc_tb_t *tb_env;
711 ppcemb_timer_t *ppcemb_timer;
712 uint64_t now, next;
713
714 env = opaque;
715 tb_env = env->tb_env;
716 ppcemb_timer = tb_env->opaque;
717 now = qemu_get_clock(vm_clock);
718 switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) {
719 case 0:
720 next = 1 << 9;
721 break;
722 case 1:
723 next = 1 << 13;
724 break;
725 case 2:
726 next = 1 << 17;
727 break;
728 case 3:
729 next = 1 << 21;
730 break;
731 default:
732 /* Cannot occur, but makes gcc happy */
733 return;
734 }
735 next = now + muldiv64(next, ticks_per_sec, tb_env->tb_freq);
736 if (next == now)
737 next++;
738 qemu_mod_timer(ppcemb_timer->fit_timer, next);
739 env->spr[SPR_40x_TSR] |= 1 << 26;
740 if ((env->spr[SPR_40x_TCR] >> 23) & 0x1)
741 ppc_set_irq(env, PPC_INTERRUPT_FIT, 1);
742 LOG_TB("%s: ir %d TCR " ADDRX " TSR " ADDRX "\n", __func__,
743 (int)((env->spr[SPR_40x_TCR] >> 23) & 0x1),
744 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
745 }
746
747 /* Programmable interval timer */
748 static void start_stop_pit (CPUState *env, ppc_tb_t *tb_env, int is_excp)
749 {
750 ppcemb_timer_t *ppcemb_timer;
751 uint64_t now, next;
752
753 ppcemb_timer = tb_env->opaque;
754 if (ppcemb_timer->pit_reload <= 1 ||
755 !((env->spr[SPR_40x_TCR] >> 26) & 0x1) ||
756 (is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) {
757 /* Stop PIT */
758 LOG_TB("%s: stop PIT\n", __func__);
759 qemu_del_timer(tb_env->decr_timer);
760 } else {
761 LOG_TB("%s: start PIT %016" PRIx64 "\n",
762 __func__, ppcemb_timer->pit_reload);
763 now = qemu_get_clock(vm_clock);
764 next = now + muldiv64(ppcemb_timer->pit_reload,
765 ticks_per_sec, tb_env->decr_freq);
766 if (is_excp)
767 next += tb_env->decr_next - now;
768 if (next == now)
769 next++;
770 qemu_mod_timer(tb_env->decr_timer, next);
771 tb_env->decr_next = next;
772 }
773 }
774
775 static void cpu_4xx_pit_cb (void *opaque)
776 {
777 CPUState *env;
778 ppc_tb_t *tb_env;
779 ppcemb_timer_t *ppcemb_timer;
780
781 env = opaque;
782 tb_env = env->tb_env;
783 ppcemb_timer = tb_env->opaque;
784 env->spr[SPR_40x_TSR] |= 1 << 27;
785 if ((env->spr[SPR_40x_TCR] >> 26) & 0x1)
786 ppc_set_irq(env, PPC_INTERRUPT_PIT, 1);
787 start_stop_pit(env, tb_env, 1);
788 LOG_TB("%s: ar %d ir %d TCR " ADDRX " TSR " ADDRX " "
789 "%016" PRIx64 "\n", __func__,
790 (int)((env->spr[SPR_40x_TCR] >> 22) & 0x1),
791 (int)((env->spr[SPR_40x_TCR] >> 26) & 0x1),
792 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR],
793 ppcemb_timer->pit_reload);
794 }
795
796 /* Watchdog timer */
797 static void cpu_4xx_wdt_cb (void *opaque)
798 {
799 CPUState *env;
800 ppc_tb_t *tb_env;
801 ppcemb_timer_t *ppcemb_timer;
802 uint64_t now, next;
803
804 env = opaque;
805 tb_env = env->tb_env;
806 ppcemb_timer = tb_env->opaque;
807 now = qemu_get_clock(vm_clock);
808 switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) {
809 case 0:
810 next = 1 << 17;
811 break;
812 case 1:
813 next = 1 << 21;
814 break;
815 case 2:
816 next = 1 << 25;
817 break;
818 case 3:
819 next = 1 << 29;
820 break;
821 default:
822 /* Cannot occur, but makes gcc happy */
823 return;
824 }
825 next = now + muldiv64(next, ticks_per_sec, tb_env->decr_freq);
826 if (next == now)
827 next++;
828 LOG_TB("%s: TCR " ADDRX " TSR " ADDRX "\n", __func__,
829 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
830 switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) {
831 case 0x0:
832 case 0x1:
833 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
834 ppcemb_timer->wdt_next = next;
835 env->spr[SPR_40x_TSR] |= 1 << 31;
836 break;
837 case 0x2:
838 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
839 ppcemb_timer->wdt_next = next;
840 env->spr[SPR_40x_TSR] |= 1 << 30;
841 if ((env->spr[SPR_40x_TCR] >> 27) & 0x1)
842 ppc_set_irq(env, PPC_INTERRUPT_WDT, 1);
843 break;
844 case 0x3:
845 env->spr[SPR_40x_TSR] &= ~0x30000000;
846 env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
847 switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) {
848 case 0x0:
849 /* No reset */
850 break;
851 case 0x1: /* Core reset */
852 ppc40x_core_reset(env);
853 break;
854 case 0x2: /* Chip reset */
855 ppc40x_chip_reset(env);
856 break;
857 case 0x3: /* System reset */
858 ppc40x_system_reset(env);
859 break;
860 }
861 }
862 }
863
864 void store_40x_pit (CPUState *env, target_ulong val)
865 {
866 ppc_tb_t *tb_env;
867 ppcemb_timer_t *ppcemb_timer;
868
869 tb_env = env->tb_env;
870 ppcemb_timer = tb_env->opaque;
871 LOG_TB("%s val" ADDRX "\n", __func__, val);
872 ppcemb_timer->pit_reload = val;
873 start_stop_pit(env, tb_env, 0);
874 }
875
876 target_ulong load_40x_pit (CPUState *env)
877 {
878 return cpu_ppc_load_decr(env);
879 }
880
881 void store_booke_tsr (CPUState *env, target_ulong val)
882 {
883 LOG_TB("%s: val " ADDRX "\n", __func__, val);
884 env->spr[SPR_40x_TSR] &= ~(val & 0xFC000000);
885 if (val & 0x80000000)
886 ppc_set_irq(env, PPC_INTERRUPT_PIT, 0);
887 }
888
889 void store_booke_tcr (CPUState *env, target_ulong val)
890 {
891 ppc_tb_t *tb_env;
892
893 tb_env = env->tb_env;
894 LOG_TB("%s: val " ADDRX "\n", __func__, val);
895 env->spr[SPR_40x_TCR] = val & 0xFFC00000;
896 start_stop_pit(env, tb_env, 1);
897 cpu_4xx_wdt_cb(env);
898 }
899
900 static void ppc_emb_set_tb_clk (void *opaque, uint32_t freq)
901 {
902 CPUState *env = opaque;
903 ppc_tb_t *tb_env = env->tb_env;
904
905 LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__,
906 freq);
907 tb_env->tb_freq = freq;
908 tb_env->decr_freq = freq;
909 /* XXX: we should also update all timers */
910 }
911
912 clk_setup_cb ppc_emb_timers_init (CPUState *env, uint32_t freq)
913 {
914 ppc_tb_t *tb_env;
915 ppcemb_timer_t *ppcemb_timer;
916
917 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
918 if (tb_env == NULL) {
919 return NULL;
920 }
921 env->tb_env = tb_env;
922 ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t));
923 tb_env->tb_freq = freq;
924 tb_env->decr_freq = freq;
925 tb_env->opaque = ppcemb_timer;
926 LOG_TB("%s freq %" PRIu32 "\n", __func__, freq);
927 if (ppcemb_timer != NULL) {
928 /* We use decr timer for PIT */
929 tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_4xx_pit_cb, env);
930 ppcemb_timer->fit_timer =
931 qemu_new_timer(vm_clock, &cpu_4xx_fit_cb, env);
932 ppcemb_timer->wdt_timer =
933 qemu_new_timer(vm_clock, &cpu_4xx_wdt_cb, env);
934 }
935
936 return &ppc_emb_set_tb_clk;
937 }
938
939 /*****************************************************************************/
940 /* Embedded PowerPC Device Control Registers */
941 typedef struct ppc_dcrn_t ppc_dcrn_t;
942 struct ppc_dcrn_t {
943 dcr_read_cb dcr_read;
944 dcr_write_cb dcr_write;
945 void *opaque;
946 };
947
948 /* XXX: on 460, DCR addresses are 32 bits wide,
949 * using DCRIPR to get the 22 upper bits of the DCR address
950 */
951 #define DCRN_NB 1024
952 struct ppc_dcr_t {
953 ppc_dcrn_t dcrn[DCRN_NB];
954 int (*read_error)(int dcrn);
955 int (*write_error)(int dcrn);
956 };
957
958 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp)
959 {
960 ppc_dcrn_t *dcr;
961
962 if (dcrn < 0 || dcrn >= DCRN_NB)
963 goto error;
964 dcr = &dcr_env->dcrn[dcrn];
965 if (dcr->dcr_read == NULL)
966 goto error;
967 *valp = (*dcr->dcr_read)(dcr->opaque, dcrn);
968
969 return 0;
970
971 error:
972 if (dcr_env->read_error != NULL)
973 return (*dcr_env->read_error)(dcrn);
974
975 return -1;
976 }
977
978 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val)
979 {
980 ppc_dcrn_t *dcr;
981
982 if (dcrn < 0 || dcrn >= DCRN_NB)
983 goto error;
984 dcr = &dcr_env->dcrn[dcrn];
985 if (dcr->dcr_write == NULL)
986 goto error;
987 (*dcr->dcr_write)(dcr->opaque, dcrn, val);
988
989 return 0;
990
991 error:
992 if (dcr_env->write_error != NULL)
993 return (*dcr_env->write_error)(dcrn);
994
995 return -1;
996 }
997
998 int ppc_dcr_register (CPUState *env, int dcrn, void *opaque,
999 dcr_read_cb dcr_read, dcr_write_cb dcr_write)
1000 {
1001 ppc_dcr_t *dcr_env;
1002 ppc_dcrn_t *dcr;
1003
1004 dcr_env = env->dcr_env;
1005 if (dcr_env == NULL)
1006 return -1;
1007 if (dcrn < 0 || dcrn >= DCRN_NB)
1008 return -1;
1009 dcr = &dcr_env->dcrn[dcrn];
1010 if (dcr->opaque != NULL ||
1011 dcr->dcr_read != NULL ||
1012 dcr->dcr_write != NULL)
1013 return -1;
1014 dcr->opaque = opaque;
1015 dcr->dcr_read = dcr_read;
1016 dcr->dcr_write = dcr_write;
1017
1018 return 0;
1019 }
1020
1021 int ppc_dcr_init (CPUState *env, int (*read_error)(int dcrn),
1022 int (*write_error)(int dcrn))
1023 {
1024 ppc_dcr_t *dcr_env;
1025
1026 dcr_env = qemu_mallocz(sizeof(ppc_dcr_t));
1027 if (dcr_env == NULL)
1028 return -1;
1029 dcr_env->read_error = read_error;
1030 dcr_env->write_error = write_error;
1031 env->dcr_env = dcr_env;
1032
1033 return 0;
1034 }
1035
1036 #if 0
1037 /*****************************************************************************/
1038 /* Handle system reset (for now, just stop emulation) */
1039 void cpu_ppc_reset (CPUState *env)
1040 {
1041 printf("Reset asked... Stop emulation\n");
1042 abort();
1043 }
1044 #endif
1045
1046 /*****************************************************************************/
1047 /* Debug port */
1048 void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
1049 {
1050 addr &= 0xF;
1051 switch (addr) {
1052 case 0:
1053 printf("%c", val);
1054 break;
1055 case 1:
1056 printf("\n");
1057 fflush(stdout);
1058 break;
1059 case 2:
1060 printf("Set loglevel to %04" PRIx32 "\n", val);
1061 cpu_set_log(val | 0x100);
1062 break;
1063 }
1064 }
1065
1066 /*****************************************************************************/
1067 /* NVRAM helpers */
1068 static inline uint32_t nvram_read (nvram_t *nvram, uint32_t addr)
1069 {
1070 return (*nvram->read_fn)(nvram->opaque, addr);;
1071 }
1072
1073 static inline void nvram_write (nvram_t *nvram, uint32_t addr, uint32_t val)
1074 {
1075 (*nvram->write_fn)(nvram->opaque, addr, val);
1076 }
1077
1078 void NVRAM_set_byte (nvram_t *nvram, uint32_t addr, uint8_t value)
1079 {
1080 nvram_write(nvram, addr, value);
1081 }
1082
1083 uint8_t NVRAM_get_byte (nvram_t *nvram, uint32_t addr)
1084 {
1085 return nvram_read(nvram, addr);
1086 }
1087
1088 void NVRAM_set_word (nvram_t *nvram, uint32_t addr, uint16_t value)
1089 {
1090 nvram_write(nvram, addr, value >> 8);
1091 nvram_write(nvram, addr + 1, value & 0xFF);
1092 }
1093
1094 uint16_t NVRAM_get_word (nvram_t *nvram, uint32_t addr)
1095 {
1096 uint16_t tmp;
1097
1098 tmp = nvram_read(nvram, addr) << 8;
1099 tmp |= nvram_read(nvram, addr + 1);
1100
1101 return tmp;
1102 }
1103
1104 void NVRAM_set_lword (nvram_t *nvram, uint32_t addr, uint32_t value)
1105 {
1106 nvram_write(nvram, addr, value >> 24);
1107 nvram_write(nvram, addr + 1, (value >> 16) & 0xFF);
1108 nvram_write(nvram, addr + 2, (value >> 8) & 0xFF);
1109 nvram_write(nvram, addr + 3, value & 0xFF);
1110 }
1111
1112 uint32_t NVRAM_get_lword (nvram_t *nvram, uint32_t addr)
1113 {
1114 uint32_t tmp;
1115
1116 tmp = nvram_read(nvram, addr) << 24;
1117 tmp |= nvram_read(nvram, addr + 1) << 16;
1118 tmp |= nvram_read(nvram, addr + 2) << 8;
1119 tmp |= nvram_read(nvram, addr + 3);
1120
1121 return tmp;
1122 }
1123
1124 void NVRAM_set_string (nvram_t *nvram, uint32_t addr,
1125 const char *str, uint32_t max)
1126 {
1127 int i;
1128
1129 for (i = 0; i < max && str[i] != '\0'; i++) {
1130 nvram_write(nvram, addr + i, str[i]);
1131 }
1132 nvram_write(nvram, addr + i, str[i]);
1133 nvram_write(nvram, addr + max - 1, '\0');
1134 }
1135
1136 int NVRAM_get_string (nvram_t *nvram, uint8_t *dst, uint16_t addr, int max)
1137 {
1138 int i;
1139
1140 memset(dst, 0, max);
1141 for (i = 0; i < max; i++) {
1142 dst[i] = NVRAM_get_byte(nvram, addr + i);
1143 if (dst[i] == '\0')
1144 break;
1145 }
1146
1147 return i;
1148 }
1149
1150 static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
1151 {
1152 uint16_t tmp;
1153 uint16_t pd, pd1, pd2;
1154
1155 tmp = prev >> 8;
1156 pd = prev ^ value;
1157 pd1 = pd & 0x000F;
1158 pd2 = ((pd >> 4) & 0x000F) ^ pd1;
1159 tmp ^= (pd1 << 3) | (pd1 << 8);
1160 tmp ^= pd2 | (pd2 << 7) | (pd2 << 12);
1161
1162 return tmp;
1163 }
1164
1165 static uint16_t NVRAM_compute_crc (nvram_t *nvram, uint32_t start, uint32_t count)
1166 {
1167 uint32_t i;
1168 uint16_t crc = 0xFFFF;
1169 int odd;
1170
1171 odd = count & 1;
1172 count &= ~1;
1173 for (i = 0; i != count; i++) {
1174 crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i));
1175 }
1176 if (odd) {
1177 crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
1178 }
1179
1180 return crc;
1181 }
1182
1183 #define CMDLINE_ADDR 0x017ff000
1184
1185 int PPC_NVRAM_set_params (nvram_t *nvram, uint16_t NVRAM_size,
1186 const char *arch,
1187 uint32_t RAM_size, int boot_device,
1188 uint32_t kernel_image, uint32_t kernel_size,
1189 const char *cmdline,
1190 uint32_t initrd_image, uint32_t initrd_size,
1191 uint32_t NVRAM_image,
1192 int width, int height, int depth)
1193 {
1194 uint16_t crc;
1195
1196 /* Set parameters for Open Hack'Ware BIOS */
1197 NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16);
1198 NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */
1199 NVRAM_set_word(nvram, 0x14, NVRAM_size);
1200 NVRAM_set_string(nvram, 0x20, arch, 16);
1201 NVRAM_set_lword(nvram, 0x30, RAM_size);
1202 NVRAM_set_byte(nvram, 0x34, boot_device);
1203 NVRAM_set_lword(nvram, 0x38, kernel_image);
1204 NVRAM_set_lword(nvram, 0x3C, kernel_size);
1205 if (cmdline) {
1206 /* XXX: put the cmdline in NVRAM too ? */
1207 strcpy((char *)(phys_ram_base + CMDLINE_ADDR), cmdline);
1208 NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
1209 NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
1210 } else {
1211 NVRAM_set_lword(nvram, 0x40, 0);
1212 NVRAM_set_lword(nvram, 0x44, 0);
1213 }
1214 NVRAM_set_lword(nvram, 0x48, initrd_image);
1215 NVRAM_set_lword(nvram, 0x4C, initrd_size);
1216 NVRAM_set_lword(nvram, 0x50, NVRAM_image);
1217
1218 NVRAM_set_word(nvram, 0x54, width);
1219 NVRAM_set_word(nvram, 0x56, height);
1220 NVRAM_set_word(nvram, 0x58, depth);
1221 crc = NVRAM_compute_crc(nvram, 0x00, 0xF8);
1222 NVRAM_set_word(nvram, 0xFC, crc);
1223
1224 return 0;
1225 }
Patches shipped by Fedora