2 * QEMU generic PPC hardware System Emulator
4 * Copyright (c) 2003-2007 Jocelyn Mayer
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 /*****************************************************************************/
31 /* PowerPC internal fake IRQ controller
32 * used to manage multiple sources hardware events
34 /* XXX: should be protected */
35 void ppc_set_irq (void *opaque, int n_IRQ, int level)
41 env->pending_interrupts |= 1 << n_IRQ;
42 cpu_interrupt(env, CPU_INTERRUPT_HARD);
44 env->pending_interrupts &= ~(1 << n_IRQ);
45 if (env->pending_interrupts == 0)
46 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD);
49 printf("%s: %p n_IRQ %d level %d => pending %08x req %08x\n", __func__,
50 env, n_IRQ, level, env->pending_interrupts, env->interrupt_request);
54 /* External IRQ callback from OpenPIC IRQ controller */
55 void ppc_openpic_irq (void *opaque, int n_IRQ, int level)
59 n_IRQ = PPC_INTERRUPT_EXT;
61 case OPENPIC_EVT_CINT:
62 /* On PowerPC BookE, critical input use vector 0 */
63 n_IRQ = PPC_INTERRUPT_RESET;
66 n_IRQ = PPC_INTERRUPT_MCK;
68 case OPENPIC_EVT_DEBUG:
69 n_IRQ = PPC_INTERRUPT_DEBUG;
71 case OPENPIC_EVT_RESET:
72 qemu_system_reset_request();
75 ppc_set_irq(opaque, n_IRQ, level);
78 /*****************************************************************************/
79 /* PPC time base and decrementer emulation */
83 /* Time base management */
84 int64_t tb_offset; /* Compensation */
85 uint32_t tb_freq; /* TB frequency */
86 /* Decrementer management */
87 uint64_t decr_next; /* Tick for next decr interrupt */
88 struct QEMUTimer *decr_timer;
92 static inline uint64_t cpu_ppc_get_tb (ppc_tb_t *tb_env)
94 /* TB time in tb periods */
95 return muldiv64(qemu_get_clock(vm_clock) + tb_env->tb_offset,
96 tb_env->tb_freq, ticks_per_sec);
99 uint32_t cpu_ppc_load_tbl (CPUState *env)
101 ppc_tb_t *tb_env = env->tb_env;
104 tb = cpu_ppc_get_tb(tb_env);
107 static int last_time;
110 if (last_time != now) {
112 printf("%s: tb=0x%016lx %d %08lx\n",
113 __func__, tb, now, tb_env->tb_offset);
118 return tb & 0xFFFFFFFF;
121 uint32_t cpu_ppc_load_tbu (CPUState *env)
123 ppc_tb_t *tb_env = env->tb_env;
126 tb = cpu_ppc_get_tb(tb_env);
128 printf("%s: tb=0x%016lx\n", __func__, tb);
134 static void cpu_ppc_store_tb (ppc_tb_t *tb_env, uint64_t value)
136 tb_env->tb_offset = muldiv64(value, ticks_per_sec, tb_env->tb_freq)
137 - qemu_get_clock(vm_clock);
139 printf("%s: tb=0x%016lx offset=%08x\n", __func__, value);
143 void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
145 ppc_tb_t *tb_env = env->tb_env;
147 cpu_ppc_store_tb(tb_env,
148 ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
151 void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
153 ppc_tb_t *tb_env = env->tb_env;
155 cpu_ppc_store_tb(tb_env,
156 ((uint64_t)cpu_ppc_load_tbu(env) << 32) | value);
159 uint32_t cpu_ppc_load_decr (CPUState *env)
161 ppc_tb_t *tb_env = env->tb_env;
165 diff = tb_env->decr_next - qemu_get_clock(vm_clock);
167 decr = muldiv64(diff, tb_env->tb_freq, ticks_per_sec);
169 decr = -muldiv64(-diff, tb_env->tb_freq, ticks_per_sec);
170 #if defined(DEBUG_TB)
171 printf("%s: 0x%08x\n", __func__, decr);
177 /* When decrementer expires,
178 * all we need to do is generate or queue a CPU exception
180 static inline void cpu_ppc_decr_excp (CPUState *env)
184 printf("raise decrementer exception\n");
186 ppc_set_irq(env, PPC_INTERRUPT_DECR, 1);
189 static void _cpu_ppc_store_decr (CPUState *env, uint32_t decr,
190 uint32_t value, int is_excp)
192 ppc_tb_t *tb_env = env->tb_env;
196 printf("%s: 0x%08x => 0x%08x\n", __func__, decr, value);
198 now = qemu_get_clock(vm_clock);
199 next = now + muldiv64(value, ticks_per_sec, tb_env->tb_freq);
201 next += tb_env->decr_next - now;
204 tb_env->decr_next = next;
206 qemu_mod_timer(tb_env->decr_timer, next);
207 /* If we set a negative value and the decrementer was positive,
208 * raise an exception.
210 if ((value & 0x80000000) && !(decr & 0x80000000))
211 cpu_ppc_decr_excp(env);
214 void cpu_ppc_store_decr (CPUState *env, uint32_t value)
216 _cpu_ppc_store_decr(env, cpu_ppc_load_decr(env), value, 0);
219 static void cpu_ppc_decr_cb (void *opaque)
221 _cpu_ppc_store_decr(opaque, 0x00000000, 0xFFFFFFFF, 1);
224 /* Set up (once) timebase frequency (in Hz) */
225 ppc_tb_t *cpu_ppc_tb_init (CPUState *env, uint32_t freq)
229 tb_env = qemu_mallocz(sizeof(ppc_tb_t));
232 env->tb_env = tb_env;
233 if (tb_env->tb_freq == 0 || 1) {
234 tb_env->tb_freq = freq;
235 /* Create new timer */
237 qemu_new_timer(vm_clock, &cpu_ppc_decr_cb, env);
238 /* There is a bug in Linux 2.4 kernels:
239 * if a decrementer exception is pending when it enables msr_ee,
240 * it's not ready to handle it...
242 _cpu_ppc_store_decr(env, 0xFFFFFFFF, 0xFFFFFFFF, 0);
248 /* Specific helpers for POWER & PowerPC 601 RTC */
249 ppc_tb_t *cpu_ppc601_rtc_init (CPUState *env)
251 return cpu_ppc_tb_init(env, 7812500);
254 void cpu_ppc601_store_rtcu (CPUState *env, uint32_t value)
255 __attribute__ (( alias ("cpu_ppc_store_tbu") ));
257 uint32_t cpu_ppc601_load_rtcu (CPUState *env)
258 __attribute__ (( alias ("cpu_ppc_load_tbu") ));
260 void cpu_ppc601_store_rtcl (CPUState *env, uint32_t value)
262 cpu_ppc_store_tbl(env, value & 0x3FFFFF80);
265 uint32_t cpu_ppc601_load_rtcl (CPUState *env)
267 return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
270 /*****************************************************************************/
271 /* Embedded PowerPC timers */
274 typedef struct ppcemb_timer_t ppcemb_timer_t;
275 struct ppcemb_timer_t {
276 uint64_t pit_reload; /* PIT auto-reload value */
277 uint64_t fit_next; /* Tick for next FIT interrupt */
278 struct QEMUTimer *fit_timer;
279 uint64_t wdt_next; /* Tick for next WDT interrupt */
280 struct QEMUTimer *wdt_timer;
283 /* Fixed interval timer */
284 static void cpu_4xx_fit_cb (void *opaque)
288 ppcemb_timer_t *ppcemb_timer;
292 tb_env = env->tb_env;
293 ppcemb_timer = tb_env->opaque;
294 now = qemu_get_clock(vm_clock);
295 switch ((env->spr[SPR_40x_TCR] >> 24) & 0x3) {
309 /* Cannot occur, but makes gcc happy */
312 next = now + muldiv64(next, ticks_per_sec, tb_env->tb_freq);
315 qemu_mod_timer(ppcemb_timer->fit_timer, next);
316 tb_env->decr_next = next;
317 env->spr[SPR_40x_TSR] |= 1 << 26;
318 if ((env->spr[SPR_40x_TCR] >> 23) & 0x1)
319 ppc_set_irq(env, PPC_INTERRUPT_FIT, 1);
321 fprintf(logfile, "%s: ir %d TCR %08x TSR %08x\n", __func__,
322 (env->spr[SPR_40x_TCR] >> 23) & 0x1,
323 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
327 /* Programmable interval timer */
328 static void cpu_4xx_pit_cb (void *opaque)
332 ppcemb_timer_t *ppcemb_timer;
336 tb_env = env->tb_env;
337 ppcemb_timer = tb_env->opaque;
338 now = qemu_get_clock(vm_clock);
339 if ((env->spr[SPR_40x_TCR] >> 22) & 0x1) {
341 next = now + muldiv64(ppcemb_timer->pit_reload,
342 ticks_per_sec, tb_env->tb_freq);
345 qemu_mod_timer(tb_env->decr_timer, next);
346 tb_env->decr_next = next;
348 env->spr[SPR_40x_TSR] |= 1 << 27;
349 if ((env->spr[SPR_40x_TCR] >> 26) & 0x1)
350 ppc_set_irq(env, PPC_INTERRUPT_PIT, 1);
352 fprintf(logfile, "%s: ar %d ir %d TCR %08x TSR %08x %08lx\n", __func__,
353 (env->spr[SPR_40x_TCR] >> 22) & 0x1,
354 (env->spr[SPR_40x_TCR] >> 26) & 0x1,
355 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR],
356 ppcemb_timer->pit_reload);
361 static void cpu_4xx_wdt_cb (void *opaque)
365 ppcemb_timer_t *ppcemb_timer;
369 tb_env = env->tb_env;
370 ppcemb_timer = tb_env->opaque;
371 now = qemu_get_clock(vm_clock);
372 switch ((env->spr[SPR_40x_TCR] >> 30) & 0x3) {
386 /* Cannot occur, but makes gcc happy */
389 next = now + muldiv64(next, ticks_per_sec, tb_env->tb_freq);
393 fprintf(logfile, "%s: TCR %08x TSR %08x\n", __func__,
394 env->spr[SPR_40x_TCR], env->spr[SPR_40x_TSR]);
396 switch ((env->spr[SPR_40x_TSR] >> 30) & 0x3) {
399 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
400 ppcemb_timer->wdt_next = next;
401 env->spr[SPR_40x_TSR] |= 1 << 31;
404 qemu_mod_timer(ppcemb_timer->wdt_timer, next);
405 ppcemb_timer->wdt_next = next;
406 env->spr[SPR_40x_TSR] |= 1 << 30;
407 if ((env->spr[SPR_40x_TCR] >> 27) & 0x1)
408 ppc_set_irq(env, PPC_INTERRUPT_WDT, 1);
411 env->spr[SPR_40x_TSR] &= ~0x30000000;
412 env->spr[SPR_40x_TSR] |= env->spr[SPR_40x_TCR] & 0x30000000;
413 switch ((env->spr[SPR_40x_TCR] >> 28) & 0x3) {
417 case 0x1: /* Core reset */
418 case 0x2: /* Chip reset */
419 case 0x3: /* System reset */
420 qemu_system_reset_request();
426 void store_40x_pit (CPUState *env, target_ulong val)
429 ppcemb_timer_t *ppcemb_timer;
432 tb_env = env->tb_env;
433 ppcemb_timer = tb_env->opaque;
435 fprintf(logfile, "%s %p %p\n", __func__, tb_env, ppcemb_timer);
436 ppcemb_timer->pit_reload = val;
440 fprintf(logfile, "%s: stop PIT\n", __func__);
441 qemu_del_timer(tb_env->decr_timer);
444 fprintf(logfile, "%s: start PIT 0x%08x\n", __func__, val);
445 now = qemu_get_clock(vm_clock);
446 next = now + muldiv64(val, ticks_per_sec, tb_env->tb_freq);
449 qemu_mod_timer(tb_env->decr_timer, next);
450 tb_env->decr_next = next;
454 target_ulong load_40x_pit (CPUState *env)
456 return cpu_ppc_load_decr(env);
459 void store_booke_tsr (CPUState *env, target_ulong val)
461 env->spr[SPR_40x_TSR] = val & 0xFC000000;
464 void store_booke_tcr (CPUState *env, target_ulong val)
466 /* We don't update timers now. Maybe we should... */
467 env->spr[SPR_40x_TCR] = val & 0xFF800000;
470 void ppc_emb_timers_init (CPUState *env)
473 ppcemb_timer_t *ppcemb_timer;
475 tb_env = env->tb_env;
476 ppcemb_timer = qemu_mallocz(sizeof(ppcemb_timer_t));
477 tb_env->opaque = ppcemb_timer;
479 fprintf(logfile, "%s %p %p\n", __func__, tb_env, ppcemb_timer);
480 if (ppcemb_timer != NULL) {
481 /* We use decr timer for PIT */
482 tb_env->decr_timer = qemu_new_timer(vm_clock, &cpu_4xx_pit_cb, env);
483 ppcemb_timer->fit_timer =
484 qemu_new_timer(vm_clock, &cpu_4xx_fit_cb, env);
485 ppcemb_timer->wdt_timer =
486 qemu_new_timer(vm_clock, &cpu_4xx_wdt_cb, env);
491 /*****************************************************************************/
492 /* Handle system reset (for now, just stop emulation) */
493 void cpu_ppc_reset (CPUState *env)
495 printf("Reset asked... Stop emulation\n");
500 /*****************************************************************************/
502 void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val)
514 printf("Set loglevel to %04x\n", val);
515 cpu_set_log(val | 0x100);
520 /*****************************************************************************/
522 void NVRAM_set_byte (m48t59_t *nvram, uint32_t addr, uint8_t value)
524 m48t59_write(nvram, addr, value);
527 uint8_t NVRAM_get_byte (m48t59_t *nvram, uint32_t addr)
529 return m48t59_read(nvram, addr);
532 void NVRAM_set_word (m48t59_t *nvram, uint32_t addr, uint16_t value)
534 m48t59_write(nvram, addr, value >> 8);
535 m48t59_write(nvram, addr + 1, value & 0xFF);
538 uint16_t NVRAM_get_word (m48t59_t *nvram, uint32_t addr)
542 tmp = m48t59_read(nvram, addr) << 8;
543 tmp |= m48t59_read(nvram, addr + 1);
547 void NVRAM_set_lword (m48t59_t *nvram, uint32_t addr, uint32_t value)
549 m48t59_write(nvram, addr, value >> 24);
550 m48t59_write(nvram, addr + 1, (value >> 16) & 0xFF);
551 m48t59_write(nvram, addr + 2, (value >> 8) & 0xFF);
552 m48t59_write(nvram, addr + 3, value & 0xFF);
555 uint32_t NVRAM_get_lword (m48t59_t *nvram, uint32_t addr)
559 tmp = m48t59_read(nvram, addr) << 24;
560 tmp |= m48t59_read(nvram, addr + 1) << 16;
561 tmp |= m48t59_read(nvram, addr + 2) << 8;
562 tmp |= m48t59_read(nvram, addr + 3);
567 void NVRAM_set_string (m48t59_t *nvram, uint32_t addr,
568 const unsigned char *str, uint32_t max)
572 for (i = 0; i < max && str[i] != '\0'; i++) {
573 m48t59_write(nvram, addr + i, str[i]);
575 m48t59_write(nvram, addr + max - 1, '\0');
578 int NVRAM_get_string (m48t59_t *nvram, uint8_t *dst, uint16_t addr, int max)
583 for (i = 0; i < max; i++) {
584 dst[i] = NVRAM_get_byte(nvram, addr + i);
592 static uint16_t NVRAM_crc_update (uint16_t prev, uint16_t value)
595 uint16_t pd, pd1, pd2;
600 pd2 = ((pd >> 4) & 0x000F) ^ pd1;
601 tmp ^= (pd1 << 3) | (pd1 << 8);
602 tmp ^= pd2 | (pd2 << 7) | (pd2 << 12);
607 uint16_t NVRAM_compute_crc (m48t59_t *nvram, uint32_t start, uint32_t count)
610 uint16_t crc = 0xFFFF;
615 for (i = 0; i != count; i++) {
616 crc = NVRAM_crc_update(crc, NVRAM_get_word(nvram, start + i));
619 crc = NVRAM_crc_update(crc, NVRAM_get_byte(nvram, start + i) << 8);
625 #define CMDLINE_ADDR 0x017ff000
627 int PPC_NVRAM_set_params (m48t59_t *nvram, uint16_t NVRAM_size,
628 const unsigned char *arch,
629 uint32_t RAM_size, int boot_device,
630 uint32_t kernel_image, uint32_t kernel_size,
632 uint32_t initrd_image, uint32_t initrd_size,
633 uint32_t NVRAM_image,
634 int width, int height, int depth)
638 /* Set parameters for Open Hack'Ware BIOS */
639 NVRAM_set_string(nvram, 0x00, "QEMU_BIOS", 16);
640 NVRAM_set_lword(nvram, 0x10, 0x00000002); /* structure v2 */
641 NVRAM_set_word(nvram, 0x14, NVRAM_size);
642 NVRAM_set_string(nvram, 0x20, arch, 16);
643 NVRAM_set_lword(nvram, 0x30, RAM_size);
644 NVRAM_set_byte(nvram, 0x34, boot_device);
645 NVRAM_set_lword(nvram, 0x38, kernel_image);
646 NVRAM_set_lword(nvram, 0x3C, kernel_size);
648 /* XXX: put the cmdline in NVRAM too ? */
649 strcpy(phys_ram_base + CMDLINE_ADDR, cmdline);
650 NVRAM_set_lword(nvram, 0x40, CMDLINE_ADDR);
651 NVRAM_set_lword(nvram, 0x44, strlen(cmdline));
653 NVRAM_set_lword(nvram, 0x40, 0);
654 NVRAM_set_lword(nvram, 0x44, 0);
656 NVRAM_set_lword(nvram, 0x48, initrd_image);
657 NVRAM_set_lword(nvram, 0x4C, initrd_size);
658 NVRAM_set_lword(nvram, 0x50, NVRAM_image);
660 NVRAM_set_word(nvram, 0x54, width);
661 NVRAM_set_word(nvram, 0x56, height);
662 NVRAM_set_word(nvram, 0x58, depth);
663 crc = NVRAM_compute_crc(nvram, 0x00, 0xF8);
664 NVRAM_set_word(nvram, 0xFC, crc);