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ditto hw/xilinx_uartlite.c
[qemu/aliguori.git] / hw / ppc.c
blob915771944ba54a14b8f5aa0700eca74b931c86eb
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 #include "loader.h"
31 #include "kvm.h"
32 #include "kvm_ppc.h"
33
34 //#define PPC_DEBUG_IRQ
35 //#define PPC_DEBUG_TB
36
37 #ifdef PPC_DEBUG_IRQ
38 # define LOG_IRQ(...) qemu_log_mask(CPU_LOG_INT, ## __VA_ARGS__)
39 #else
40 # define LOG_IRQ(...) do { } while (0)
41 #endif
42
43
44 #ifdef PPC_DEBUG_TB
45 # define LOG_TB(...) qemu_log(__VA_ARGS__)
46 #else
47 # define LOG_TB(...) do { } while (0)
48 #endif
49
50 static void cpu_ppc_tb_stop (CPUState *env);
51 static void cpu_ppc_tb_start (CPUState *env);
52
53 static void ppc_set_irq (CPUState *env, int n_IRQ, int level)
54 {
55 unsigned int old_pending = env->pending_interrupts;
56
57 if (level) {
58 env->pending_interrupts |= 1 << n_IRQ;
59 cpu_interrupt(env, CPU_INTERRUPT_HARD);
60 } else {
61 env->pending_interrupts &= ~(1 << n_IRQ);
62 if (env->pending_interrupts == 0)
63 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
64 }
65
66 if (old_pending != env->pending_interrupts) {
67 #ifdef CONFIG_KVM
68 kvmppc_set_interrupt(env, n_IRQ, level);
69 #endif
70 }
71
72 LOG_IRQ("%s: %p n_IRQ %d level %d => pending %08" PRIx32
73 "req %08x\n", __func__, env, n_IRQ, level,
74 env->pending_interrupts, env->interrupt_request);
75 }
76
77 /* PowerPC 6xx / 7xx internal IRQ controller */
78 static void ppc6xx_set_irq (void *opaque, int pin, int level)
79 {
80 CPUState *env = opaque;
81 int cur_level;
82
83 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
84 env, pin, level);
85 cur_level = (env->irq_input_state >> pin) & 1;
86 /* Don't generate spurious events */
87 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
88 switch (pin) {
89 case PPC6xx_INPUT_TBEN:
90 /* Level sensitive - active high */
91 LOG_IRQ("%s: %s the time base\n",
92 __func__, level ? "start" : "stop");
93 if (level) {
94 cpu_ppc_tb_start(env);
95 } else {
96 cpu_ppc_tb_stop(env);
97 }
98 case PPC6xx_INPUT_INT:
99 /* Level sensitive - active high */
100 LOG_IRQ("%s: set the external IRQ state to %d\n",
101 __func__, level);
102 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
103 break;
104 case PPC6xx_INPUT_SMI:
105 /* Level sensitive - active high */
106 LOG_IRQ("%s: set the SMI IRQ state to %d\n",
107 __func__, level);
108 ppc_set_irq(env, PPC_INTERRUPT_SMI, level);
109 break;
110 case PPC6xx_INPUT_MCP:
111 /* Negative edge sensitive */
112 /* XXX: TODO: actual reaction may depends on HID0 status
113 * 603/604/740/750: check HID0[EMCP]
114 */
115 if (cur_level == 1 && level == 0) {
116 LOG_IRQ("%s: raise machine check state\n",
117 __func__);
118 ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
119 }
120 break;
121 case PPC6xx_INPUT_CKSTP_IN:
122 /* Level sensitive - active low */
123 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
124 /* XXX: Note that the only way to restart the CPU is to reset it */
125 if (level) {
126 LOG_IRQ("%s: stop the CPU\n", __func__);
127 env->halted = 1;
128 }
129 break;
130 case PPC6xx_INPUT_HRESET:
131 /* Level sensitive - active low */
132 if (level) {
133 LOG_IRQ("%s: reset the CPU\n", __func__);
134 env->interrupt_request |= CPU_INTERRUPT_EXITTB;
135 /* XXX: TOFIX */
136 #if 0
137 cpu_reset(env);
138 #else
139 qemu_system_reset_request();
140 #endif
141 }
142 break;
143 case PPC6xx_INPUT_SRESET:
144 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
145 __func__, level);
146 ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
147 break;
148 default:
149 /* Unknown pin - do nothing */
150 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
151 return;
152 }
153 if (level)
154 env->irq_input_state |= 1 << pin;
155 else
156 env->irq_input_state &= ~(1 << pin);
157 }
158 }
159
160 void ppc6xx_irq_init (CPUState *env)
161 {
162 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, env,
163 PPC6xx_INPUT_NB);
164 }
165
166 #if defined(TARGET_PPC64)
167 /* PowerPC 970 internal IRQ controller */
168 static void ppc970_set_irq (void *opaque, int pin, int level)
169 {
170 CPUState *env = opaque;
171 int cur_level;
172
173 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
174 env, pin, level);
175 cur_level = (env->irq_input_state >> pin) & 1;
176 /* Don't generate spurious events */
177 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
178 switch (pin) {
179 case PPC970_INPUT_INT:
180 /* Level sensitive - active high */
181 LOG_IRQ("%s: set the external IRQ state to %d\n",
182 __func__, level);
183 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
184 break;
185 case PPC970_INPUT_THINT:
186 /* Level sensitive - active high */
187 LOG_IRQ("%s: set the SMI IRQ state to %d\n", __func__,
188 level);
189 ppc_set_irq(env, PPC_INTERRUPT_THERM, level);
190 break;
191 case PPC970_INPUT_MCP:
192 /* Negative edge sensitive */
193 /* XXX: TODO: actual reaction may depends on HID0 status
194 * 603/604/740/750: check HID0[EMCP]
195 */
196 if (cur_level == 1 && level == 0) {
197 LOG_IRQ("%s: raise machine check state\n",
198 __func__);
199 ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
200 }
201 break;
202 case PPC970_INPUT_CKSTP:
203 /* Level sensitive - active low */
204 /* XXX: TODO: relay the signal to CKSTP_OUT pin */
205 if (level) {
206 LOG_IRQ("%s: stop the CPU\n", __func__);
207 env->halted = 1;
208 } else {
209 LOG_IRQ("%s: restart the CPU\n", __func__);
210 env->halted = 0;
211 qemu_cpu_kick(env);
212 }
213 break;
214 case PPC970_INPUT_HRESET:
215 /* Level sensitive - active low */
216 if (level) {
217 #if 0 // XXX: TOFIX
218 LOG_IRQ("%s: reset the CPU\n", __func__);
219 cpu_reset(env);
220 #endif
221 }
222 break;
223 case PPC970_INPUT_SRESET:
224 LOG_IRQ("%s: set the RESET IRQ state to %d\n",
225 __func__, level);
226 ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
227 break;
228 case PPC970_INPUT_TBEN:
229 LOG_IRQ("%s: set the TBEN state to %d\n", __func__,
230 level);
231 /* XXX: TODO */
232 break;
233 default:
234 /* Unknown pin - do nothing */
235 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
236 return;
237 }
238 if (level)
239 env->irq_input_state |= 1 << pin;
240 else
241 env->irq_input_state &= ~(1 << pin);
242 }
243 }
244
245 void ppc970_irq_init (CPUState *env)
246 {
247 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, env,
248 PPC970_INPUT_NB);
249 }
250
251 /* POWER7 internal IRQ controller */
252 static void power7_set_irq (void *opaque, int pin, int level)
253 {
254 CPUState *env = opaque;
255
256 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
257 env, pin, level);
258
259 switch (pin) {
260 case POWER7_INPUT_INT:
261 /* Level sensitive - active high */
262 LOG_IRQ("%s: set the external IRQ state to %d\n",
263 __func__, level);
264 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
265 break;
266 default:
267 /* Unknown pin - do nothing */
268 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
269 return;
270 }
271 if (level) {
272 env->irq_input_state |= 1 << pin;
273 } else {
274 env->irq_input_state &= ~(1 << pin);
275 }
276 }
277
278 void ppcPOWER7_irq_init (CPUState *env)
279 {
280 env->irq_inputs = (void **)qemu_allocate_irqs(&power7_set_irq, env,
281 POWER7_INPUT_NB);
282 }
283 #endif /* defined(TARGET_PPC64) */
284
285 /* PowerPC 40x internal IRQ controller */
286 static void ppc40x_set_irq (void *opaque, int pin, int level)
287 {
288 CPUState *env = opaque;
289 int cur_level;
290
291 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
292 env, pin, level);
293 cur_level = (env->irq_input_state >> pin) & 1;
294 /* Don't generate spurious events */
295 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
296 switch (pin) {
297 case PPC40x_INPUT_RESET_SYS:
298 if (level) {
299 LOG_IRQ("%s: reset the PowerPC system\n",
300 __func__);
301 ppc40x_system_reset(env);
302 }
303 break;
304 case PPC40x_INPUT_RESET_CHIP:
305 if (level) {
306 LOG_IRQ("%s: reset the PowerPC chip\n", __func__);
307 ppc40x_chip_reset(env);
308 }
309 break;
310 case PPC40x_INPUT_RESET_CORE:
311 /* XXX: TODO: update DBSR[MRR] */
312 if (level) {
313 LOG_IRQ("%s: reset the PowerPC core\n", __func__);
314 ppc40x_core_reset(env);
315 }
316 break;
317 case PPC40x_INPUT_CINT:
318 /* Level sensitive - active high */
319 LOG_IRQ("%s: set the critical IRQ state to %d\n",
320 __func__, level);
321 ppc_set_irq(env, PPC_INTERRUPT_CEXT, level);
322 break;
323 case PPC40x_INPUT_INT:
324 /* Level sensitive - active high */
325 LOG_IRQ("%s: set the external IRQ state to %d\n",
326 __func__, level);
327 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
328 break;
329 case PPC40x_INPUT_HALT:
330 /* Level sensitive - active low */
331 if (level) {
332 LOG_IRQ("%s: stop the CPU\n", __func__);
333 env->halted = 1;
334 } else {
335 LOG_IRQ("%s: restart the CPU\n", __func__);
336 env->halted = 0;
337 qemu_cpu_kick(env);
338 }
339 break;
340 case PPC40x_INPUT_DEBUG:
341 /* Level sensitive - active high */
342 LOG_IRQ("%s: set the debug pin state to %d\n",
343 __func__, level);
344 ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level);
345 break;
346 default:
347 /* Unknown pin - do nothing */
348 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
349 return;
350 }
351 if (level)
352 env->irq_input_state |= 1 << pin;
353 else
354 env->irq_input_state &= ~(1 << pin);
355 }
356 }
357
358 void ppc40x_irq_init (CPUState *env)
359 {
360 env->irq_inputs = (void **)qemu_allocate_irqs(&ppc40x_set_irq,
361 env, PPC40x_INPUT_NB);
362 }
363
364 /* PowerPC E500 internal IRQ controller */
365 static void ppce500_set_irq (void *opaque, int pin, int level)
366 {
367 CPUState *env = opaque;
368 int cur_level;
369
370 LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
371 env, pin, level);
372 cur_level = (env->irq_input_state >> pin) & 1;
373 /* Don't generate spurious events */
374 if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
375 switch (pin) {
376 case PPCE500_INPUT_MCK:
377 if (level) {
378 LOG_IRQ("%s: reset the PowerPC system\n",
379 __func__);
380 qemu_system_reset_request();
381 }
382 break;
383 case PPCE500_INPUT_RESET_CORE:
384 if (level) {
385 LOG_IRQ("%s: reset the PowerPC core\n", __func__);
386 ppc_set_irq(env, PPC_INTERRUPT_MCK, level);
387 }
388 break;
389 case PPCE500_INPUT_CINT:
390 /* Level sensitive - active high */
391 LOG_IRQ("%s: set the critical IRQ state to %d\n",
392 __func__, level);
393 ppc_set_irq(env, PPC_INTERRUPT_CEXT, level);
394 break;
395 case PPCE500_INPUT_INT:
396 /* Level sensitive - active high */
397 LOG_IRQ("%s: set the core IRQ state to %d\n",
398 __func__, level);
399 ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
400 break;
401 case PPCE500_INPUT_DEBUG:
402 /* Level sensitive - active high */
403 LOG_IRQ("%s: set the debug pin state to %d\n",
404 __func__, level);
405 ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level);
406 break;
407 default:
408 /* Unknown pin - do nothing */
409 LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
410 return;
411 }
412 if (level)
413 env->irq_input_state |= 1 << pin;
414 else
415 env->irq_input_state &= ~(1 << pin);
416 }
417 }
418
419 void ppce500_irq_init (CPUState *env)
420 {
421 env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq,
422 env, PPCE500_INPUT_NB);
423 }
424 /*****************************************************************************/
425 /* PowerPC time base and decrementer emulation */
426 struct ppc_tb_t {
427 /* Time base management */
428 int64_t tb_offset; /* Compensation */
429 int64_t atb_offset; /* Compensation */
430 uint32_t tb_freq; /* TB frequency */
431 /* Decrementer management */
432 uint64_t decr_next; /* Tick for next decr interrupt */
433 uint32_t decr_freq; /* decrementer frequency */
434 struct QEMUTimer *decr_timer;
435 /* Hypervisor decrementer management */
436 uint64_t hdecr_next; /* Tick for next hdecr interrupt */
437 struct QEMUTimer *hdecr_timer;
438 uint64_t purr_load;
439 uint64_t purr_start;
440 void *opaque;
441 };
442
443 static inline uint64_t cpu_ppc_get_tb(ppc_tb_t *tb_env, uint64_t vmclk,
444 int64_t tb_offset)
445 {
446 /* TB time in tb periods */
447 return muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec()) + tb_offset;
448 }
449
450 uint64_t cpu_ppc_load_tbl (CPUState *env)
451 {
452 ppc_tb_t *tb_env = env->tb_env;
453 uint64_t tb;
454
455 if (kvm_enabled()) {
456 return env->spr[SPR_TBL];
457 }
458
459 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock_ns(vm_clock), tb_env->tb_offset);
460 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
461
462 return tb;
463 }
464
465 static inline uint32_t _cpu_ppc_load_tbu(CPUState *env)
466 {
467 ppc_tb_t *tb_env = env->tb_env;
468 uint64_t tb;
469
470 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock_ns(vm_clock), tb_env->tb_offset);
471 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
472
473 return tb >> 32;
474 }
475
476 uint32_t cpu_ppc_load_tbu (CPUState *env)
477 {
478 if (kvm_enabled()) {
479 return env->spr[SPR_TBU];
480 }
481
482 return _cpu_ppc_load_tbu(env);
483 }
484
485 static inline void cpu_ppc_store_tb(ppc_tb_t *tb_env, uint64_t vmclk,
486 int64_t *tb_offsetp, uint64_t value)
487 {
488 *tb_offsetp = value - muldiv64(vmclk, tb_env->tb_freq, get_ticks_per_sec());
489 LOG_TB("%s: tb %016" PRIx64 " offset %08" PRIx64 "\n",
490 __func__, value, *tb_offsetp);
491 }
492
493 void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
494 {
495 ppc_tb_t *tb_env = env->tb_env;
496 uint64_t tb;
497
498 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock_ns(vm_clock), tb_env->tb_offset);
499 tb &= 0xFFFFFFFF00000000ULL;
500 cpu_ppc_store_tb(tb_env, qemu_get_clock_ns(vm_clock),
501 &tb_env->tb_offset, tb | (uint64_t)value);
502 }
503
504 static inline void _cpu_ppc_store_tbu(CPUState *env, uint32_t value)
505 {
506 ppc_tb_t *tb_env = env->tb_env;
507 uint64_t tb;
508
509 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock_ns(vm_clock), tb_env->tb_offset);
510 tb &= 0x00000000FFFFFFFFULL;
511 cpu_ppc_store_tb(tb_env, qemu_get_clock_ns(vm_clock),
512 &tb_env->tb_offset, ((uint64_t)value << 32) | tb);
513 }
514
515 void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
516 {
517 _cpu_ppc_store_tbu(env, value);
518 }
519
520 uint64_t cpu_ppc_load_atbl (CPUState *env)
521 {
522 ppc_tb_t *tb_env = env->tb_env;
523 uint64_t tb;
524
525 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock_ns(vm_clock), tb_env->atb_offset);
526 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
527
528 return tb;
529 }
530
531 uint32_t cpu_ppc_load_atbu (CPUState *env)
532 {
533 ppc_tb_t *tb_env = env->tb_env;
534 uint64_t tb;
535
536 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock_ns(vm_clock), tb_env->atb_offset);
537 LOG_TB("%s: tb %016" PRIx64 "\n", __func__, tb);
538
539 return tb >> 32;
540 }
541
542 void cpu_ppc_store_atbl (CPUState *env, uint32_t value)
543 {
544 ppc_tb_t *tb_env = env->tb_env;
545 uint64_t tb;
546
547 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock_ns(vm_clock), tb_env->atb_offset);
548 tb &= 0xFFFFFFFF00000000ULL;
549 cpu_ppc_store_tb(tb_env, qemu_get_clock_ns(vm_clock),
550 &tb_env->atb_offset, tb | (uint64_t)value);
551 }
552
553 void cpu_ppc_store_atbu (CPUState *env, uint32_t value)
554 {
555 ppc_tb_t *tb_env = env->tb_env;
556 uint64_t tb;
557
558 tb = cpu_ppc_get_tb(tb_env, qemu_get_clock_ns(vm_clock), tb_env->atb_offset);
559 tb &= 0x00000000FFFFFFFFULL;
560 cpu_ppc_store_tb(tb_env, qemu_get_clock_ns(vm_clock),
561 &tb_env->atb_offset, ((uint64_t)value << 32) | tb);
562 }
563
564 static void cpu_ppc_tb_stop (CPUState *env)
565 {
566 ppc_tb_t *tb_env = env->tb_env;
567 uint64_t tb, atb, vmclk;
568
569 /* If the time base is already frozen, do nothing */
570 if (tb_env->tb_freq != 0) {
571 vmclk = qemu_get_clock_ns(vm_clock);
572 /* Get the time base */
573 tb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->tb_offset);
574 /* Get the alternate time base */
575 atb = cpu_ppc_get_tb(tb_env, vmclk, tb_env->atb_offset);
576 /* Store the time base value (ie compute the current offset) */
577 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
578 /* Store the alternate time base value (compute the current offset) */
579 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
580 /* Set the time base frequency to zero */
581 tb_env->tb_freq = 0;
582 /* Now, the time bases are frozen to tb_offset / atb_offset value */
583 }
584 }
585
586 static void cpu_ppc_tb_start (CPUState *env)
587 {
588 ppc_tb_t *tb_env = env->tb_env;
589 uint64_t tb, atb, vmclk;
590
591 /* If the time base is not frozen, do nothing */
592 if (tb_env->tb_freq == 0) {
593 vmclk = qemu_get_clock_ns(vm_clock);
594 /* Get the time base from tb_offset */
595 tb = tb_env->tb_offset;
596 /* Get the alternate time base from atb_offset */
597 atb = tb_env->atb_offset;
598 /* Restore the tb frequency from the decrementer frequency */
599 tb_env->tb_freq = tb_env->decr_freq;
600 /* Store the time base value */
601 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->tb_offset, tb);
602 /* Store the alternate time base value */
603 cpu_ppc_store_tb(tb_env, vmclk, &tb_env->atb_offset, atb);
604 }
605 }
606
607 static inline uint32_t _cpu_ppc_load_decr(CPUState *env, uint64_t next)
608 {
609 ppc_tb_t *tb_env = env->tb_env;
610 uint32_t decr;
611 int64_t diff;
612
613 diff = next - qemu_get_clock_ns(vm_clock);
614 if (diff >= 0)
615 decr = muldiv64(diff, tb_env->decr_freq, get_ticks_per_sec());
616 else
617 decr = -muldiv64(-diff, tb_env->decr_freq, get_ticks_per_sec());
618 LOG_TB("%s: %08" PRIx32 "\n", __func__, decr);
619
620 return decr;
621 }
622
623 uint32_t cpu_ppc_load_decr (CPUState *env)
624 {
625 ppc_tb_t *tb_env = env->tb_env;
626
627 if (kvm_enabled()) {
628 return env->spr[SPR_DECR];
629 }
630
631 return _cpu_ppc_load_decr(env, tb_env->decr_next);
632 }
633
634 uint32_t cpu_ppc_load_hdecr (CPUState *env)
635 {
636 ppc_tb_t *tb_env = env->tb_env;
637
638 return _cpu_ppc_load_decr(env, tb_env->hdecr_next);
639 }
640
641 uint64_t cpu_ppc_load_purr (CPUState *env)
642 {
643 ppc_tb_t *tb_env = env->tb_env;
644 uint64_t diff;
645
646 diff = qemu_get_clock_ns(vm_clock) - tb_env->purr_start;
647
648 return tb_env->purr_load + muldiv64(diff, tb_env->tb_freq, get_ticks_per_sec());
649 }
650
651 /* When decrementer expires,
652 * all we need to do is generate or queue a CPU exception
653 */
654 static inline void cpu_ppc_decr_excp(CPUState *env)
655 {
656 /* Raise it */
657 LOG_TB("raise decrementer exception\n");
658 ppc_set_irq(env, PPC_INTERRUPT_DECR, 1);
659 }
660
661 static inline void cpu_ppc_hdecr_excp(CPUState *env)
662 {
663 /* Raise it */
664 LOG_TB("raise decrementer exception\n");
665 ppc_set_irq(env, PPC_INTERRUPT_HDECR, 1);
666 }
667
668 static void __cpu_ppc_store_decr (CPUState *env, uint64_t *nextp,
669 struct QEMUTimer *timer,
670 void (*raise_excp)(CPUState *),
671 uint32_t decr, uint32_t value,
672 int is_excp)
673 {
674 ppc_tb_t *tb_env = env->tb_env;
675 uint64_t now, next;
676
677 LOG_TB("%s: %08" PRIx32 " => %08" PRIx32 "\n", __func__,
678 decr, value);
679 now = qemu_get_clock_ns(vm_clock);
680 next = now + muldiv64(value, get_ticks_per_sec(), tb_env->decr_freq);
681 if (is_excp)
682 next += *nextp - now;
683 if (next == now)
684 next++;
685 *nextp = next;
686 /* Adjust timer */
687 qemu_mod_timer(timer, next);
688 /* If we set a negative value and the decrementer was positive,
689 * raise an exception.
690 */
691 if ((value & 0x80000000) && !(decr & 0x80000000))
692 (*raise_excp)(env);
693 }
694
695 static inline void _cpu_ppc_store_decr(CPUState *env, uint32_t decr,
696 uint32_t value, int is_excp)
697 {
698 ppc_tb_t *tb_env = env->tb_env;
699
700 __cpu_ppc_store_decr(env, &tb_env->decr_next, tb_env->decr_timer,
701 &cpu_ppc_decr_excp, decr, value, is_excp);
702 }
703
704 void cpu_ppc_store_decr (CPUState *env, uint32_t value)
705 {
706 _cpu_ppc_store_decr(env, cpu_ppc_load_decr(env), value, 0);
707 }
708
709 static void cpu_ppc_decr_cb (void *opaque)
710 {
711 _cpu_ppc_store_decr(opaque, 0x00000000, 0xFFFFFFFF, 1);
712 }
713
714 static inline void _cpu_ppc_store_hdecr(CPUState *env, uint32_t hdecr,
715 uint32_t value, int is_excp)
716 {
717 ppc_tb_t *tb_env = env->tb_env;
718
719 if (tb_env->hdecr_timer != NULL) {
720 __cpu_ppc_store_decr(env, &tb_env->hdecr_next, tb_env->hdecr_timer,
721 &cpu_ppc_hdecr_excp, hdecr, value, is_excp);
722 }
723 }
724
725 void cpu_ppc_store_hdecr (CPUState *env, uint32_t value)
726 {
727 _cpu_ppc_store_hdecr(env, cpu_ppc_load_hdecr(env), value, 0);
728 }
729
730 static void cpu_ppc_hdecr_cb (void *opaque)
731 {
732 _cpu_ppc_store_hdecr(opaque, 0x00000000, 0xFFFFFFFF, 1);
733 }
734
735 void cpu_ppc_store_purr (CPUState *env, uint64_t value)
736 {
737 ppc_tb_t *tb_env = env->tb_env;
738
739 tb_env->purr_load = value;
740 tb_env->purr_start = qemu_get_clock_ns(vm_clock);
741 }
742
743 static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq)
744 {
745 CPUState *env = opaque;
746 ppc_tb_t *tb_env = env->tb_env;
747
748 tb_env->tb_freq = freq;
749 tb_env->decr_freq = freq;
750 /* There is a bug in Linux 2.4 kernels:
751 * if a decrementer exception is pending when it enables msr_ee at startup,
752 * it's not ready to handle it...
753 */
754 _cpu_ppc_store_decr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
755 _cpu_ppc_store_hdecr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
756 cpu_ppc_store_purr(env, 0x0000000000000000ULL);
757 }
758
759 /* Set up (once) timebase frequency (in Hz) */
760 clk_setup_cb cpu_ppc_tb_init (CPUState *env, uint32_t freq)
761 {
762 ppc_tb_t *tb_env;
763
764 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
765 env->tb_env = tb_env;
766 /* Create new timer */
767 tb_env->decr_timer = qemu_new_timer_ns(vm_clock, &cpu_ppc_decr_cb, env);
768 if (0) {
769 /* XXX: find a suitable condition to enable the hypervisor decrementer
770 */
771 tb_env->hdecr_timer = qemu_new_timer_ns(vm_clock, &cpu_ppc_hdecr_cb, env);
772 } else {
773 tb_env->hdecr_timer = NULL;
774 }
775 cpu_ppc_set_tb_clk(env, freq);
776
777 return &cpu_ppc_set_tb_clk;
778 }
779
780 /* Specific helpers for POWER & PowerPC 601 RTC */
781 #if 0
782 static clk_setup_cb cpu_ppc601_rtc_init (CPUState *env)
783 {
784 return cpu_ppc_tb_init(env, 7812500);
785 }
786 #endif
787
788 void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
789 {
790 _cpu_ppc_store_tbu(env, value);
791 }
792
793 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
794 {
795 return _cpu_ppc_load_tbu(env);
796 }
797
798 void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value)
799 {
800 cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
801 }
802
803 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
804 {
805 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
806 }
807
808 /*****************************************************************************/
809 /* Embedded PowerPC timers */
810
811 /* PIT, FIT & WDT */
812 typedef struct ppcemb_timer_t ppcemb_timer_t;
813 struct ppcemb_timer_t {
814 uint64_t pit_reload; /* PIT auto-reload value */
815 uint64_t fit_next; /* Tick for next FIT interrupt */
816 struct QEMUTimer *fit_timer;
817 uint64_t wdt_next; /* Tick for next WDT interrupt */
818 struct QEMUTimer *wdt_timer;
819
820 /* 405 have the PIT, 440 have a DECR. */
821 unsigned int decr_excp;
822 };
823
824 /* Fixed interval timer */
825 static void cpu_4xx_fit_cb (void *opaque)
826 {
827 CPUState *env;
828 ppc_tb_t *tb_env;
829 ppcemb_timer_t *ppcemb_timer;
830 uint64_t now, next;
831
832 env = opaque;
833 tb_env = env->tb_env;
834 ppcemb_timer = tb_env->opaque;
835 now = qemu_get_clock_ns(vm_clock);
836 switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) {
837 case 0:
838 next = 1 << 9;
839 break;
840 case 1:
841 next = 1 << 13;
842 break;
843 case 2:
844 next = 1 << 17;
845 break;
846 case 3:
847 next = 1 << 21;
848 break;
849 default:
850 /* Cannot occur, but makes gcc happy */
851 return;
852 }
853 next = now + muldiv64(next, get_ticks_per_sec(), tb_env->tb_freq);
854 if (next == now)
855 next++;
856 qemu_mod_timer(ppcemb_timer->fit_timer, next);
857 env->spr[SPR_40x_TSR] |= 1 << 26;
858 if ((env->spr[SPR_40x_TCR] >> 23) & 0x1)
859 ppc_set_irq(env, PPC_INTERRUPT_FIT, 1);
860 LOG_TB("%s: ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__,
861 (int)((env->spr[SPR_40x_TCR] >> 23) & 0x1),
862 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
863 }
864
865 /* Programmable interval timer */
866 static void start_stop_pit (CPUState *env, ppc_tb_t *tb_env, int is_excp)
867 {
868 ppcemb_timer_t *ppcemb_timer;
869 uint64_t now, next;
870
871 ppcemb_timer = tb_env->opaque;
872 if (ppcemb_timer->pit_reload <= 1 ||
873 !((env->spr[SPR_40x_TCR] >> 26) & 0x1) ||
874 (is_excp && !((env->spr[SPR_40x_TCR] >> 22) & 0x1))) {
875 /* Stop PIT */
876 LOG_TB("%s: stop PIT\n", __func__);
877 qemu_del_timer(tb_env->decr_timer);
878 } else {
879 LOG_TB("%s: start PIT %016" PRIx64 "\n",
880 __func__, ppcemb_timer->pit_reload);
881 now = qemu_get_clock_ns(vm_clock);
882 next = now + muldiv64(ppcemb_timer->pit_reload,
883 get_ticks_per_sec(), tb_env->decr_freq);
884 if (is_excp)
885 next += tb_env->decr_next - now;
886 if (next == now)
887 next++;
888 qemu_mod_timer(tb_env->decr_timer, next);
889 tb_env->decr_next = next;
890 }
891 }
892
893 static void cpu_4xx_pit_cb (void *opaque)
894 {
895 CPUState *env;
896 ppc_tb_t *tb_env;
897 ppcemb_timer_t *ppcemb_timer;
898
899 env = opaque;
900 tb_env = env->tb_env;
901 ppcemb_timer = tb_env->opaque;
902 env->spr[SPR_40x_TSR] |= 1 << 27;
903 if ((env->spr[SPR_40x_TCR] >> 26) & 0x1)
904 ppc_set_irq(env, ppcemb_timer->decr_excp, 1);
905 start_stop_pit(env, tb_env, 1);
906 LOG_TB("%s: ar %d ir %d TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx " "
907 "%016" PRIx64 "\n", __func__,
908 (int)((env->spr[SPR_40x_TCR] >> 22) & 0x1),
909 (int)((env->spr[SPR_40x_TCR] >> 26) & 0x1),
910 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR],
911 ppcemb_timer->pit_reload);
912 }
913
914 /* Watchdog timer */
915 static void cpu_4xx_wdt_cb (void *opaque)
916 {
917 CPUState *env;
918 ppc_tb_t *tb_env;
919 ppcemb_timer_t *ppcemb_timer;
920 uint64_t now, next;
921
922 env = opaque;
923 tb_env = env->tb_env;
924 ppcemb_timer = tb_env->opaque;
925 now = qemu_get_clock_ns(vm_clock);
926 switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) {
927 case 0:
928 next = 1 << 17;
929 break;
930 case 1:
931 next = 1 << 21;
932 break;
933 case 2:
934 next = 1 << 25;
935 break;
936 case 3:
937 next = 1 << 29;
938 break;
939 default:
940 /* Cannot occur, but makes gcc happy */
941 return;
942 }
943 next = now + muldiv64(next, get_ticks_per_sec(), tb_env->decr_freq);
944 if (next == now)
945 next++;
946 LOG_TB("%s: TCR " TARGET_FMT_lx " TSR " TARGET_FMT_lx "\n", __func__,
947 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
948 switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) {
949 case 0x0:
950 case 0x1:
951 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
952 ppcemb_timer->wdt_next = next;
953 env->spr[SPR_40x_TSR] |= 1 << 31;
954 break;
955 case 0x2:
956 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
957 ppcemb_timer->wdt_next = next;
958 env->spr[SPR_40x_TSR] |= 1 << 30;
959 if ((env->spr[SPR_40x_TCR] >> 27) & 0x1)
960 ppc_set_irq(env, PPC_INTERRUPT_WDT, 1);
961 break;
962 case 0x3:
963 env->spr[SPR_40x_TSR] &= ~0x30000000;
964 env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
965 switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) {
966 case 0x0:
967 /* No reset */
968 break;
969 case 0x1: /* Core reset */
970 ppc40x_core_reset(env);
971 break;
972 case 0x2: /* Chip reset */
973 ppc40x_chip_reset(env);
974 break;
975 case 0x3: /* System reset */
976 ppc40x_system_reset(env);
977 break;
978 }
979 }
980 }
981
982 void store_40x_pit (CPUState *env, target_ulong val)
983 {
984 ppc_tb_t *tb_env;
985 ppcemb_timer_t *ppcemb_timer;
986
987 tb_env = env->tb_env;
988 ppcemb_timer = tb_env->opaque;
989 LOG_TB("%s val" TARGET_FMT_lx "\n", __func__, val);
990 ppcemb_timer->pit_reload = val;
991 start_stop_pit(env, tb_env, 0);
992 }
993
994 target_ulong load_40x_pit (CPUState *env)
995 {
996 return cpu_ppc_load_decr(env);
997 }
998
999 void store_booke_tsr (CPUState *env, target_ulong val)
1000 {
1001 ppc_tb_t *tb_env = env->tb_env;
1002 ppcemb_timer_t *ppcemb_timer;
1003
1004 ppcemb_timer = tb_env->opaque;
1005
1006 LOG_TB("%s: val " TARGET_FMT_lx "\n", __func__, val);
1007 env->spr[SPR_40x_TSR] &= ~(val & 0xFC000000);
1008 if (val & 0x80000000)
1009 ppc_set_irq(env, ppcemb_timer->decr_excp, 0);
1010 }
1011
1012 void store_booke_tcr (CPUState *env, target_ulong val)
1013 {
1014 ppc_tb_t *tb_env;
1015
1016 tb_env = env->tb_env;
1017 LOG_TB("%s: val " TARGET_FMT_lx "\n", __func__, val);
1018 env->spr[SPR_40x_TCR] = val & 0xFFC00000;
1019 start_stop_pit(env, tb_env, 1);
1020 cpu_4xx_wdt_cb(env);
1021 }
1022
1023 static void ppc_emb_set_tb_clk (void *opaque, uint32_t freq)
1024 {
1025 CPUState *env = opaque;
1026 ppc_tb_t *tb_env = env->tb_env;
1027
1028 LOG_TB("%s set new frequency to %" PRIu32 "\n", __func__,
1029 freq);
1030 tb_env->tb_freq = freq;
1031 tb_env->decr_freq = freq;
1032 /* XXX: we should also update all timers */
1033 }
1034
1035 clk_setup_cb ppc_emb_timers_init (CPUState *env, uint32_t freq,
1036 unsigned int decr_excp)
1037 {
1038 ppc_tb_t *tb_env;
1039 ppcemb_timer_t *ppcemb_timer;
1040
1041 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
1042 env->tb_env = tb_env;
1043 ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t));
1044 tb_env->tb_freq = freq;
1045 tb_env->decr_freq = freq;
1046 tb_env->opaque = ppcemb_timer;
1047 LOG_TB("%s freq %" PRIu32 "\n", __func__, freq);
1048 if (ppcemb_timer != NULL) {
1049 /* We use decr timer for PIT */
1050 tb_env->decr_timer = qemu_new_timer_ns(vm_clock, &cpu_4xx_pit_cb, env);
1051 ppcemb_timer->fit_timer =
1052 qemu_new_timer_ns(vm_clock, &cpu_4xx_fit_cb, env);
1053 ppcemb_timer->wdt_timer =
1054 qemu_new_timer_ns(vm_clock, &cpu_4xx_wdt_cb, env);
1055 ppcemb_timer->decr_excp = decr_excp;
1056 }
1057
1058 return &ppc_emb_set_tb_clk;
1059 }
1060
1061 /*****************************************************************************/
1062 /* Embedded PowerPC Device Control Registers */
1063 typedef struct ppc_dcrn_t ppc_dcrn_t;
1064 struct ppc_dcrn_t {
1065 dcr_read_cb dcr_read;
1066 dcr_write_cb dcr_write;
1067 void *opaque;
1068 };
1069
1070 /* XXX: on 460, DCR addresses are 32 bits wide,
1071 * using DCRIPR to get the 22 upper bits of the DCR address
1072 */
1073 #define DCRN_NB 1024
1074 struct ppc_dcr_t {
1075 ppc_dcrn_t dcrn[DCRN_NB];
1076 int (*read_error)(int dcrn);
1077 int (*write_error)(int dcrn);
1078 };
1079
1080 int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp)
1081 {
1082 ppc_dcrn_t *dcr;
1083
1084 if (dcrn < 0 || dcrn >= DCRN_NB)
1085 goto error;
1086 dcr = &dcr_env->dcrn[dcrn];
1087 if (dcr->dcr_read == NULL)
1088 goto error;
1089 *valp = (*dcr->dcr_read)(dcr->opaque, dcrn);
1090
1091 return 0;
1092
1093 error:
1094 if (dcr_env->read_error != NULL)
1095 return (*dcr_env->read_error)(dcrn);
1096
1097 return -1;
1098 }
1099
1100 int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val)
1101 {
1102 ppc_dcrn_t *dcr;
1103
1104 if (dcrn < 0 || dcrn >= DCRN_NB)
1105 goto error;
1106 dcr = &dcr_env->dcrn[dcrn];
1107 if (dcr->dcr_write == NULL)
1108 goto error;
1109 (*dcr->dcr_write)(dcr->opaque, dcrn, val);
1110
1111 return 0;
1112
1113 error:
1114 if (dcr_env->write_error != NULL)
1115 return (*dcr_env->write_error)(dcrn);
1116
1117 return -1;
1118 }
1119
1120 int ppc_dcr_register (CPUState *env, int dcrn, void *opaque,
1121 dcr_read_cb dcr_read, dcr_write_cb dcr_write)
1122 {
1123 ppc_dcr_t *dcr_env;
1124 ppc_dcrn_t *dcr;
1125
1126 dcr_env = env->dcr_env;
1127 if (dcr_env == NULL)
1128 return -1;
1129 if (dcrn < 0 || dcrn >= DCRN_NB)
1130 return -1;
1131 dcr = &dcr_env->dcrn[dcrn];
1132 if (dcr->opaque != NULL ||
1133 dcr->dcr_read != NULL ||
1134 dcr->dcr_write != NULL)
1135 return -1;
1136 dcr->opaque = opaque;
1137 dcr->dcr_read = dcr_read;
1138 dcr->dcr_write = dcr_write;
1139
1140 return 0;
1141 }
1142
1143 int ppc_dcr_init (CPUState *env, int (*read_error)(int dcrn),
1144 int (*write_error)(int dcrn))
1145 {
1146 ppc_dcr_t *dcr_env;
1147
1148 dcr_env = qemu_mallocz(sizeof(ppc_dcr_t));
1149 dcr_env->read_error = read_error;
1150 dcr_env->write_error = write_error;
1151 env->dcr_env = dcr_env;
1152
1153 return 0;
1154 }
1155
1156 /*****************************************************************************/
1157 /* Debug port */
1158 void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
1159 {
1160 addr &= 0xF;
1161 switch (addr) {
1162 case 0:
1163 printf("%c", val);
1164 break;
1165 case 1:
1166 printf("\n");
1167 fflush(stdout);
1168 break;
1169 case 2:
1170 printf("Set loglevel to %04" PRIx32 "\n", val);
1171 cpu_set_log(val | 0x100);
1172 break;
1173 }
1174 }
1175
1176 /*****************************************************************************/
1177 /* NVRAM helpers */
1178 static inline uint32_t nvram_read (nvram_t *nvram, uint32_t addr)
1179 {
1180 return (*nvram->read_fn)(nvram->opaque, addr);;
1181 }
1182
1183 static inline void nvram_write (nvram_t *nvram, uint32_t addr, uint32_t val)
1184 {
1185 (*nvram->write_fn)(nvram->opaque, addr, val);
1186 }
1187
1188 void NVRAM_set_byte (nvram_t *nvram, uint32_t addr, uint8_t value)
1189 {
1190 nvram_write(nvram, addr, value);
1191 }
1192
1193 uint8_t NVRAM_get_byte (nvram_t *nvram, uint32_t addr)
1194 {
1195 return nvram_read(nvram, addr);
1196 }
1197
1198 void NVRAM_set_word (nvram_t *nvram, uint32_t addr, uint16_t value)
1199 {
1200 nvram_write(nvram, addr, value >> 8);
1201 nvram_write(nvram, addr + 1, value & 0xFF);
1202 }
1203
1204 uint16_t NVRAM_get_word (nvram_t *nvram, uint32_t addr)
1205 {
1206 uint16_t tmp;
1207
1208 tmp = nvram_read(nvram, addr) << 8;
1209 tmp |= nvram_read(nvram, addr + 1);
1210
1211 return tmp;
1212 }
1213
1214 void NVRAM_set_lword (nvram_t *nvram, uint32_t addr, uint32_t value)
1215 {
1216 nvram_write(nvram, addr, value >> 24);
1217 nvram_write(nvram, addr + 1, (value >> 16) & 0xFF);
1218 nvram_write(nvram, addr + 2, (value >> 8) & 0xFF);
1219 nvram_write(nvram, addr + 3, value & 0xFF);
1220 }
1221
1222 uint32_t NVRAM_get_lword (nvram_t *nvram, uint32_t addr)
1223 {
1224 uint32_t tmp;
1225
1226 tmp = nvram_read(nvram, addr) << 24;
1227 tmp |= nvram_read(nvram, addr + 1) << 16;
1228 tmp |= nvram_read(nvram, addr + 2) << 8;
1229 tmp |= nvram_read(nvram, addr + 3);
1230
1231 return tmp;
1232 }
1233
1234 void NVRAM_set_string (nvram_t *nvram, uint32_t addr,
1235 const char *str, uint32_t max)
1236 {
1237 int i;
1238
1239 for (i = 0; i < max && str[i] != '\0'; i++) {
1240 nvram_write(nvram, addr + i, str[i]);
1241 }
1242 nvram_write(nvram, addr + i, str[i]);
1243 nvram_write(nvram, addr + max - 1, '\0');
1244 }
1245
1246 int NVRAM_get_string (nvram_t *nvram, uint8_t *dst, uint16_t addr, int max)
1247 {
1248 int i;
1249
1250 memset(dst, 0, max);
1251 for (i = 0; i < max; i++) {
1252 dst[i] = NVRAM_get_byte(nvram, addr + i);
1253 if (dst[i] == '\0')
1254 break;
1255 }
1256
1257 return i;
1258 }
1259
1260 static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
1261 {
1262 uint16_t tmp;
1263 uint16_t pd, pd1, pd2;
1264
1265 tmp = prev >> 8;
1266 pd = prev ^ value;
1267 pd1 = pd & 0x000F;
1268 pd2 = ((pd >> 4) & 0x000F) ^ pd1;
1269 tmp ^= (pd1 << 3) | (pd1 << 8);
1270 tmp ^= pd2 | (pd2 << 7) | (pd2 << 12);
1271
1272 return tmp;
1273 }
1274
1275 static uint16_t NVRAM_compute_crc (nvram_t *nvram, uint32_t start, uint32_t count)
1276 {
1277 uint32_t i;
1278 uint16_t crc = 0xFFFF;
1279 int odd;
1280
1281 odd = count & 1;
1282 count &= ~1;
1283 for (i = 0; i != count; i++) {
1284 crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i));
1285 }
1286 if (odd) {
1287 crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
1288 }
1289
1290 return crc;
1291 }
1292
1293 #define CMDLINE_ADDR 0x017ff000
1294
1295 int PPC_NVRAM_set_params (nvram_t *nvram, uint16_t NVRAM_size,
1296 const char *arch,
1297 uint32_t RAM_size, int boot_device,
1298 uint32_t kernel_image, uint32_t kernel_size,
1299 const char *cmdline,
1300 uint32_t initrd_image, uint32_t initrd_size,
1301 uint32_t NVRAM_image,
1302 int width, int height, int depth)
1303 {
1304 uint16_t crc;
1305
1306 /* Set parameters for Open Hack'Ware BIOS */
1307 NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16);
1308 NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */
1309 NVRAM_set_word(nvram, 0x14, NVRAM_size);
1310 NVRAM_set_string(nvram, 0x20, arch, 16);
1311 NVRAM_set_lword(nvram, 0x30, RAM_size);
1312 NVRAM_set_byte(nvram, 0x34, boot_device);
1313 NVRAM_set_lword(nvram, 0x38, kernel_image);
1314 NVRAM_set_lword(nvram, 0x3C, kernel_size);
1315 if (cmdline) {
1316 /* XXX: put the cmdline in NVRAM too ? */
1317 pstrcpy_targphys("cmdline", CMDLINE_ADDR, RAM_size - CMDLINE_ADDR, cmdline);
1318 NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
1319 NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
1320 } else {
1321 NVRAM_set_lword(nvram, 0x40, 0);
1322 NVRAM_set_lword(nvram, 0x44, 0);
1323 }
1324 NVRAM_set_lword(nvram, 0x48, initrd_image);
1325 NVRAM_set_lword(nvram, 0x4C, initrd_size);
1326 NVRAM_set_lword(nvram, 0x50, NVRAM_image);
1327
1328 NVRAM_set_word(nvram, 0x54, width);
1329 NVRAM_set_word(nvram, 0x56, height);
1330 NVRAM_set_word(nvram, 0x58, depth);
1331 crc = NVRAM_compute_crc(nvram, 0x00, 0xF8);
1332 NVRAM_set_word(nvram, 0xFC, crc);
1333
1334 return 0;
1335 }
Anthony Liguori's QEMU tree