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[qemu/mini2440.git] / target-ppc / helper.c
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1 /*
2 * PowerPC emulation helpers for qemu.
3 *
4 * Copyright (c) 2003-2005 Jocelyn Mayer
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #include <stdarg.h>
21 #include <stdlib.h>
22 #include <stdio.h>
23 #include <string.h>
24 #include <inttypes.h>
25 #include <signal.h>
26 #include <assert.h>
28 #include "cpu.h"
29 #include "exec-all.h"
31 //#define DEBUG_MMU
32 //#define DEBUG_BATS
33 //#define DEBUG_EXCEPTIONS
34 //#define FLUSH_ALL_TLBS
36 /*****************************************************************************/
37 /* PowerPC MMU emulation */
39 #if defined(CONFIG_USER_ONLY)
40 int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
41 int is_user, int is_softmmu)
43 int exception, error_code;
45 if (rw == 2) {
46 exception = EXCP_ISI;
47 error_code = 0;
48 } else {
49 exception = EXCP_DSI;
50 error_code = 0;
51 if (rw)
52 error_code |= 0x02000000;
53 env->spr[SPR_DAR] = address;
54 env->spr[SPR_DSISR] = error_code;
56 env->exception_index = exception;
57 env->error_code = error_code;
58 return 1;
60 target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
62 return addr;
64 #else
65 /* Perform BAT hit & translation */
66 static int get_bat (CPUState *env, uint32_t *real, int *prot,
67 uint32_t virtual, int rw, int type)
69 uint32_t *BATlt, *BATut, *BATu, *BATl;
70 uint32_t base, BEPIl, BEPIu, bl;
71 int i;
72 int ret = -1;
74 #if defined (DEBUG_BATS)
75 if (loglevel > 0) {
76 fprintf(logfile, "%s: %cBAT v 0x%08x\n", __func__,
77 type == ACCESS_CODE ? 'I' : 'D', virtual);
79 #endif
80 switch (type) {
81 case ACCESS_CODE:
82 BATlt = env->IBAT[1];
83 BATut = env->IBAT[0];
84 break;
85 default:
86 BATlt = env->DBAT[1];
87 BATut = env->DBAT[0];
88 break;
90 #if defined (DEBUG_BATS)
91 if (loglevel > 0) {
92 fprintf(logfile, "%s...: %cBAT v 0x%08x\n", __func__,
93 type == ACCESS_CODE ? 'I' : 'D', virtual);
95 #endif
96 base = virtual & 0xFFFC0000;
97 for (i = 0; i < 4; i++) {
98 BATu = &BATut[i];
99 BATl = &BATlt[i];
100 BEPIu = *BATu & 0xF0000000;
101 BEPIl = *BATu & 0x0FFE0000;
102 bl = (*BATu & 0x00001FFC) << 15;
103 #if defined (DEBUG_BATS)
104 if (loglevel > 0) {
105 fprintf(logfile, "%s: %cBAT%d v 0x%08x BATu 0x%08x BATl 0x%08x\n",
106 __func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual,
107 *BATu, *BATl);
109 #endif
110 if ((virtual & 0xF0000000) == BEPIu &&
111 ((virtual & 0x0FFE0000) & ~bl) == BEPIl) {
112 /* BAT matches */
113 if ((msr_pr == 0 && (*BATu & 0x00000002)) ||
114 (msr_pr == 1 && (*BATu & 0x00000001))) {
115 /* Get physical address */
116 *real = (*BATl & 0xF0000000) |
117 ((virtual & 0x0FFE0000 & bl) | (*BATl & 0x0FFE0000)) |
118 (virtual & 0x0001F000);
119 if (*BATl & 0x00000001)
120 *prot = PAGE_READ;
121 if (*BATl & 0x00000002)
122 *prot = PAGE_WRITE | PAGE_READ;
123 #if defined (DEBUG_BATS)
124 if (loglevel > 0) {
125 fprintf(logfile, "BAT %d match: r 0x%08x prot=%c%c\n",
126 i, *real, *prot & PAGE_READ ? 'R' : '-',
127 *prot & PAGE_WRITE ? 'W' : '-');
129 #endif
130 ret = 0;
131 break;
135 if (ret < 0) {
136 #if defined (DEBUG_BATS)
137 printf("no BAT match for 0x%08x:\n", virtual);
138 for (i = 0; i < 4; i++) {
139 BATu = &BATut[i];
140 BATl = &BATlt[i];
141 BEPIu = *BATu & 0xF0000000;
142 BEPIl = *BATu & 0x0FFE0000;
143 bl = (*BATu & 0x00001FFC) << 15;
144 printf("%s: %cBAT%d v 0x%08x BATu 0x%08x BATl 0x%08x \n\t"
145 "0x%08x 0x%08x 0x%08x\n",
146 __func__, type == ACCESS_CODE ? 'I' : 'D', i, virtual,
147 *BATu, *BATl, BEPIu, BEPIl, bl);
149 #endif
151 /* No hit */
152 return ret;
155 /* PTE table lookup */
156 static int find_pte (uint32_t *RPN, int *prot, uint32_t base, uint32_t va,
157 int h, int key, int rw)
159 uint32_t pte0, pte1, keep = 0, access = 0;
160 int i, good = -1, store = 0;
161 int ret = -1; /* No entry found */
163 for (i = 0; i < 8; i++) {
164 pte0 = ldl_phys(base + (i * 8));
165 pte1 = ldl_phys(base + (i * 8) + 4);
166 #if defined (DEBUG_MMU)
167 if (loglevel > 0) {
168 fprintf(logfile, "Load pte from 0x%08x => 0x%08x 0x%08x "
169 "%d %d %d 0x%08x\n", base + (i * 8), pte0, pte1,
170 pte0 >> 31, h, (pte0 >> 6) & 1, va);
172 #endif
173 /* Check validity and table match */
174 if (pte0 & 0x80000000 && (h == ((pte0 >> 6) & 1))) {
175 /* Check vsid & api */
176 if ((pte0 & 0x7FFFFFBF) == va) {
177 if (good == -1) {
178 good = i;
179 keep = pte1;
180 } else {
181 /* All matches should have equal RPN, WIMG & PP */
182 if ((keep & 0xFFFFF07B) != (pte1 & 0xFFFFF07B)) {
183 if (loglevel > 0)
184 fprintf(logfile, "Bad RPN/WIMG/PP\n");
185 return -1;
188 /* Check access rights */
189 if (key == 0) {
190 access = PAGE_READ;
191 if ((pte1 & 0x00000003) != 0x3)
192 access |= PAGE_WRITE;
193 } else {
194 switch (pte1 & 0x00000003) {
195 case 0x0:
196 access = 0;
197 break;
198 case 0x1:
199 case 0x3:
200 access = PAGE_READ;
201 break;
202 case 0x2:
203 access = PAGE_READ | PAGE_WRITE;
204 break;
207 if (ret < 0) {
208 if ((rw == 0 && (access & PAGE_READ)) ||
209 (rw == 1 && (access & PAGE_WRITE))) {
210 #if defined (DEBUG_MMU)
211 if (loglevel > 0)
212 fprintf(logfile, "PTE access granted !\n");
213 #endif
214 good = i;
215 keep = pte1;
216 ret = 0;
217 } else {
218 /* Access right violation */
219 ret = -2;
220 #if defined (DEBUG_MMU)
221 if (loglevel > 0)
222 fprintf(logfile, "PTE access rejected\n");
223 #endif
225 *prot = access;
230 if (good != -1) {
231 *RPN = keep & 0xFFFFF000;
232 #if defined (DEBUG_MMU)
233 if (loglevel > 0) {
234 fprintf(logfile, "found PTE at addr 0x%08x prot=0x%01x ret=%d\n",
235 *RPN, *prot, ret);
237 #endif
238 /* Update page flags */
239 if (!(keep & 0x00000100)) {
240 /* Access flag */
241 keep |= 0x00000100;
242 store = 1;
244 if (!(keep & 0x00000080)) {
245 if (rw && ret == 0) {
246 /* Change flag */
247 keep |= 0x00000080;
248 store = 1;
249 } else {
250 /* Force page fault for first write access */
251 *prot &= ~PAGE_WRITE;
254 if (store) {
255 stl_phys_notdirty(base + (good * 8) + 4, keep);
259 return ret;
262 static inline uint32_t get_pgaddr (uint32_t sdr1, uint32_t hash, uint32_t mask)
264 return (sdr1 & 0xFFFF0000) | (hash & mask);
267 /* Perform segment based translation */
268 static int get_segment (CPUState *env, uint32_t *real, int *prot,
269 uint32_t virtual, int rw, int type)
271 uint32_t pg_addr, sdr, ptem, vsid, pgidx;
272 uint32_t hash, mask;
273 uint32_t sr;
274 int key;
275 int ret = -1, ret2;
277 sr = env->sr[virtual >> 28];
278 #if defined (DEBUG_MMU)
279 if (loglevel > 0) {
280 fprintf(logfile, "Check segment v=0x%08x %d 0x%08x nip=0x%08x "
281 "lr=0x%08x ir=%d dr=%d pr=%d %d t=%d\n",
282 virtual, virtual >> 28, sr, env->nip,
283 env->lr, msr_ir, msr_dr, msr_pr, rw, type);
285 #endif
286 key = (((sr & 0x20000000) && msr_pr == 1) ||
287 ((sr & 0x40000000) && msr_pr == 0)) ? 1 : 0;
288 if ((sr & 0x80000000) == 0) {
289 #if defined (DEBUG_MMU)
290 if (loglevel > 0)
291 fprintf(logfile, "pte segment: key=%d n=0x%08x\n",
292 key, sr & 0x10000000);
293 #endif
294 /* Check if instruction fetch is allowed, if needed */
295 if (type != ACCESS_CODE || (sr & 0x10000000) == 0) {
296 /* Page address translation */
297 vsid = sr & 0x00FFFFFF;
298 pgidx = (virtual >> 12) & 0xFFFF;
299 sdr = env->sdr1;
300 hash = ((vsid ^ pgidx) & 0x0007FFFF) << 6;
301 mask = ((sdr & 0x000001FF) << 16) | 0xFFC0;
302 pg_addr = get_pgaddr(sdr, hash, mask);
303 ptem = (vsid << 7) | (pgidx >> 10);
304 #if defined (DEBUG_MMU)
305 if (loglevel > 0) {
306 fprintf(logfile, "0 sdr1=0x%08x vsid=0x%06x api=0x%04x "
307 "hash=0x%07x pg_addr=0x%08x\n", sdr, vsid, pgidx, hash,
308 pg_addr);
310 #endif
311 /* Primary table lookup */
312 ret = find_pte(real, prot, pg_addr, ptem, 0, key, rw);
313 if (ret < 0) {
314 /* Secondary table lookup */
315 hash = (~hash) & 0x01FFFFC0;
316 pg_addr = get_pgaddr(sdr, hash, mask);
317 #if defined (DEBUG_MMU)
318 if (virtual != 0xEFFFFFFF && loglevel > 0) {
319 fprintf(logfile, "1 sdr1=0x%08x vsid=0x%06x api=0x%04x "
320 "hash=0x%05x pg_addr=0x%08x\n", sdr, vsid, pgidx,
321 hash, pg_addr);
323 #endif
324 ret2 = find_pte(real, prot, pg_addr, ptem, 1, key, rw);
325 if (ret2 != -1)
326 ret = ret2;
328 } else {
329 #if defined (DEBUG_MMU)
330 if (loglevel > 0)
331 fprintf(logfile, "No access allowed\n");
332 #endif
333 ret = -3;
335 } else {
336 #if defined (DEBUG_MMU)
337 if (loglevel > 0)
338 fprintf(logfile, "direct store...\n");
339 #endif
340 /* Direct-store segment : absolutely *BUGGY* for now */
341 switch (type) {
342 case ACCESS_INT:
343 /* Integer load/store : only access allowed */
344 break;
345 case ACCESS_CODE:
346 /* No code fetch is allowed in direct-store areas */
347 return -4;
348 case ACCESS_FLOAT:
349 /* Floating point load/store */
350 return -4;
351 case ACCESS_RES:
352 /* lwarx, ldarx or srwcx. */
353 return -4;
354 case ACCESS_CACHE:
355 /* dcba, dcbt, dcbtst, dcbf, dcbi, dcbst, dcbz, or icbi */
356 /* Should make the instruction do no-op.
357 * As it already do no-op, it's quite easy :-)
359 *real = virtual;
360 return 0;
361 case ACCESS_EXT:
362 /* eciwx or ecowx */
363 return -4;
364 default:
365 if (logfile) {
366 fprintf(logfile, "ERROR: instruction should not need "
367 "address translation\n");
369 printf("ERROR: instruction should not need "
370 "address translation\n");
371 return -4;
373 if ((rw == 1 || key != 1) && (rw == 0 || key != 0)) {
374 *real = virtual;
375 ret = 2;
376 } else {
377 ret = -2;
381 return ret;
384 static int get_physical_address (CPUState *env, uint32_t *physical, int *prot,
385 uint32_t address, int rw, int access_type)
387 int ret;
388 #if 0
389 if (loglevel > 0) {
390 fprintf(logfile, "%s\n", __func__);
392 #endif
393 if ((access_type == ACCESS_CODE && msr_ir == 0) ||
394 (access_type != ACCESS_CODE && msr_dr == 0)) {
395 /* No address translation */
396 *physical = address & ~0xFFF;
397 *prot = PAGE_READ | PAGE_WRITE;
398 ret = 0;
399 } else {
400 /* Try to find a BAT */
401 ret = get_bat(env, physical, prot, address, rw, access_type);
402 if (ret < 0) {
403 /* We didn't match any BAT entry */
404 ret = get_segment(env, physical, prot, address, rw, access_type);
407 #if 0
408 if (loglevel > 0) {
409 fprintf(logfile, "%s address %08x => %08x\n",
410 __func__, address, *physical);
412 #endif
413 return ret;
416 target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
418 uint32_t phys_addr;
419 int prot;
421 if (get_physical_address(env, &phys_addr, &prot, addr, 0, ACCESS_INT) != 0)
422 return -1;
423 return phys_addr;
426 /* Perform address translation */
427 int cpu_ppc_handle_mmu_fault (CPUState *env, uint32_t address, int rw,
428 int is_user, int is_softmmu)
430 uint32_t physical;
431 int prot;
432 int exception = 0, error_code = 0;
433 int access_type;
434 int ret = 0;
436 if (rw == 2) {
437 /* code access */
438 rw = 0;
439 access_type = ACCESS_CODE;
440 } else {
441 /* data access */
442 /* XXX: put correct access by using cpu_restore_state()
443 correctly */
444 access_type = ACCESS_INT;
445 // access_type = env->access_type;
447 if (env->user_mode_only) {
448 /* user mode only emulation */
449 ret = -2;
450 goto do_fault;
452 ret = get_physical_address(env, &physical, &prot,
453 address, rw, access_type);
454 if (ret == 0) {
455 ret = tlb_set_page(env, address & ~0xFFF, physical, prot,
456 is_user, is_softmmu);
457 } else if (ret < 0) {
458 do_fault:
459 #if defined (DEBUG_MMU)
460 if (loglevel > 0)
461 cpu_dump_state(env, logfile, fprintf, 0);
462 #endif
463 if (access_type == ACCESS_CODE) {
464 exception = EXCP_ISI;
465 switch (ret) {
466 case -1:
467 /* No matches in page tables */
468 error_code = 0x40000000;
469 break;
470 case -2:
471 /* Access rights violation */
472 error_code = 0x08000000;
473 break;
474 case -3:
475 /* No execute protection violation */
476 error_code = 0x10000000;
477 break;
478 case -4:
479 /* Direct store exception */
480 /* No code fetch is allowed in direct-store areas */
481 error_code = 0x10000000;
482 break;
483 case -5:
484 /* No match in segment table */
485 exception = EXCP_ISEG;
486 error_code = 0;
487 break;
489 } else {
490 exception = EXCP_DSI;
491 switch (ret) {
492 case -1:
493 /* No matches in page tables */
494 error_code = 0x40000000;
495 break;
496 case -2:
497 /* Access rights violation */
498 error_code = 0x08000000;
499 break;
500 case -4:
501 /* Direct store exception */
502 switch (access_type) {
503 case ACCESS_FLOAT:
504 /* Floating point load/store */
505 exception = EXCP_ALIGN;
506 error_code = EXCP_ALIGN_FP;
507 break;
508 case ACCESS_RES:
509 /* lwarx, ldarx or srwcx. */
510 error_code = 0x04000000;
511 break;
512 case ACCESS_EXT:
513 /* eciwx or ecowx */
514 error_code = 0x04100000;
515 break;
516 default:
517 printf("DSI: invalid exception (%d)\n", ret);
518 exception = EXCP_PROGRAM;
519 error_code = EXCP_INVAL | EXCP_INVAL_INVAL;
520 break;
522 break;
523 case -5:
524 /* No match in segment table */
525 exception = EXCP_DSEG;
526 error_code = 0;
527 break;
529 if (exception == EXCP_DSI && rw == 1)
530 error_code |= 0x02000000;
531 /* Store fault address */
532 env->spr[SPR_DAR] = address;
533 env->spr[SPR_DSISR] = error_code;
535 #if 0
536 printf("%s: set exception to %d %02x\n",
537 __func__, exception, error_code);
538 #endif
539 env->exception_index = exception;
540 env->error_code = error_code;
541 ret = 1;
543 return ret;
545 #endif
547 /*****************************************************************************/
548 /* BATs management */
549 #if !defined(FLUSH_ALL_TLBS)
550 static inline void do_invalidate_BAT (CPUPPCState *env,
551 target_ulong BATu, target_ulong mask)
553 target_ulong base, end, page;
554 base = BATu & ~0x0001FFFF;
555 end = base + mask + 0x00020000;
556 #if defined (DEBUG_BATS)
557 if (loglevel != 0)
558 fprintf(logfile, "Flush BAT from %08x to %08x (%08x)\n", base, end, mask);
559 #endif
560 for (page = base; page != end; page += TARGET_PAGE_SIZE)
561 tlb_flush_page(env, page);
562 #if defined (DEBUG_BATS)
563 if (loglevel != 0)
564 fprintf(logfile, "Flush done\n");
565 #endif
567 #endif
569 static inline void dump_store_bat (CPUPPCState *env, char ID, int ul, int nr,
570 target_ulong value)
572 #if defined (DEBUG_BATS)
573 if (loglevel != 0) {
574 fprintf(logfile, "Set %cBAT%d%c to 0x%08lx (0x%08lx)\n",
575 ID, nr, ul == 0 ? 'u' : 'l', (unsigned long)value,
576 (unsigned long)env->nip);
578 #endif
581 target_ulong do_load_ibatu (CPUPPCState *env, int nr)
583 return env->IBAT[0][nr];
586 target_ulong do_load_ibatl (CPUPPCState *env, int nr)
588 return env->IBAT[1][nr];
591 void do_store_ibatu (CPUPPCState *env, int nr, target_ulong value)
593 target_ulong mask;
595 dump_store_bat(env, 'I', 0, nr, value);
596 if (env->IBAT[0][nr] != value) {
597 mask = (value << 15) & 0x0FFE0000UL;
598 #if !defined(FLUSH_ALL_TLBS)
599 do_invalidate_BAT(env, env->IBAT[0][nr], mask);
600 #endif
601 /* When storing valid upper BAT, mask BEPI and BRPN
602 * and invalidate all TLBs covered by this BAT
604 mask = (value << 15) & 0x0FFE0000UL;
605 env->IBAT[0][nr] = (value & 0x00001FFFUL) |
606 (value & ~0x0001FFFFUL & ~mask);
607 env->IBAT[1][nr] = (env->IBAT[1][nr] & 0x0000007B) |
608 (env->IBAT[1][nr] & ~0x0001FFFF & ~mask);
609 #if !defined(FLUSH_ALL_TLBS)
610 do_invalidate_BAT(env, env->IBAT[0][nr], mask);
611 #endif
612 #if defined(FLUSH_ALL_TLBS)
613 tlb_flush(env, 1);
614 #endif
618 void do_store_ibatl (CPUPPCState *env, int nr, target_ulong value)
620 dump_store_bat(env, 'I', 1, nr, value);
621 env->IBAT[1][nr] = value;
624 target_ulong do_load_dbatu (CPUPPCState *env, int nr)
626 return env->DBAT[0][nr];
629 target_ulong do_load_dbatl (CPUPPCState *env, int nr)
631 return env->DBAT[1][nr];
634 void do_store_dbatu (CPUPPCState *env, int nr, target_ulong value)
636 target_ulong mask;
638 dump_store_bat(env, 'D', 0, nr, value);
639 if (env->DBAT[0][nr] != value) {
640 /* When storing valid upper BAT, mask BEPI and BRPN
641 * and invalidate all TLBs covered by this BAT
643 mask = (value << 15) & 0x0FFE0000UL;
644 #if !defined(FLUSH_ALL_TLBS)
645 do_invalidate_BAT(env, env->DBAT[0][nr], mask);
646 #endif
647 mask = (value << 15) & 0x0FFE0000UL;
648 env->DBAT[0][nr] = (value & 0x00001FFFUL) |
649 (value & ~0x0001FFFFUL & ~mask);
650 env->DBAT[1][nr] = (env->DBAT[1][nr] & 0x0000007B) |
651 (env->DBAT[1][nr] & ~0x0001FFFF & ~mask);
652 #if !defined(FLUSH_ALL_TLBS)
653 do_invalidate_BAT(env, env->DBAT[0][nr], mask);
654 #else
655 tlb_flush(env, 1);
656 #endif
660 void do_store_dbatl (CPUPPCState *env, int nr, target_ulong value)
662 dump_store_bat(env, 'D', 1, nr, value);
663 env->DBAT[1][nr] = value;
666 static inline void invalidate_all_tlbs (CPUPPCState *env)
668 /* XXX: this needs to be completed for sotware driven TLB support */
669 tlb_flush(env, 1);
672 /*****************************************************************************/
673 /* Special registers manipulation */
674 target_ulong do_load_nip (CPUPPCState *env)
676 return env->nip;
679 void do_store_nip (CPUPPCState *env, target_ulong value)
681 env->nip = value;
684 target_ulong do_load_sdr1 (CPUPPCState *env)
686 return env->sdr1;
689 void do_store_sdr1 (CPUPPCState *env, target_ulong value)
691 #if defined (DEBUG_MMU)
692 if (loglevel != 0) {
693 fprintf(logfile, "%s: 0x%08lx\n", __func__, (unsigned long)value);
695 #endif
696 if (env->sdr1 != value) {
697 env->sdr1 = value;
698 invalidate_all_tlbs(env);
702 target_ulong do_load_sr (CPUPPCState *env, int srnum)
704 return env->sr[srnum];
707 void do_store_sr (CPUPPCState *env, int srnum, target_ulong value)
709 #if defined (DEBUG_MMU)
710 if (loglevel != 0) {
711 fprintf(logfile, "%s: reg=%d 0x%08lx %08lx\n",
712 __func__, srnum, (unsigned long)value, env->sr[srnum]);
714 #endif
715 if (env->sr[srnum] != value) {
716 env->sr[srnum] = value;
717 #if !defined(FLUSH_ALL_TLBS) && 0
719 target_ulong page, end;
720 /* Invalidate 256 MB of virtual memory */
721 page = (16 << 20) * srnum;
722 end = page + (16 << 20);
723 for (; page != end; page += TARGET_PAGE_SIZE)
724 tlb_flush_page(env, page);
726 #else
727 invalidate_all_tlbs(env);
728 #endif
732 uint32_t do_load_cr (CPUPPCState *env)
734 return (env->crf[0] << 28) |
735 (env->crf[1] << 24) |
736 (env->crf[2] << 20) |
737 (env->crf[3] << 16) |
738 (env->crf[4] << 12) |
739 (env->crf[5] << 8) |
740 (env->crf[6] << 4) |
741 (env->crf[7] << 0);
744 void do_store_cr (CPUPPCState *env, uint32_t value, uint32_t mask)
746 int i, sh;
748 for (i = 0, sh = 7; i < 8; i++, sh --) {
749 if (mask & (1 << sh))
750 env->crf[i] = (value >> (sh * 4)) & 0xFUL;
754 uint32_t do_load_xer (CPUPPCState *env)
756 return (xer_so << XER_SO) |
757 (xer_ov << XER_OV) |
758 (xer_ca << XER_CA) |
759 (xer_bc << XER_BC) |
760 (xer_cmp << XER_CMP);
763 void do_store_xer (CPUPPCState *env, uint32_t value)
765 xer_so = (value >> XER_SO) & 0x01;
766 xer_ov = (value >> XER_OV) & 0x01;
767 xer_ca = (value >> XER_CA) & 0x01;
768 xer_cmp = (value >> XER_CMP) & 0xFF;
769 xer_bc = (value >> XER_BC) & 0x3F;
772 target_ulong do_load_msr (CPUPPCState *env)
774 return (msr_vr << MSR_VR) |
775 (msr_ap << MSR_AP) |
776 (msr_sa << MSR_SA) |
777 (msr_key << MSR_KEY) |
778 (msr_pow << MSR_POW) |
779 (msr_tlb << MSR_TLB) |
780 (msr_ile << MSR_ILE) |
781 (msr_ee << MSR_EE) |
782 (msr_pr << MSR_PR) |
783 (msr_fp << MSR_FP) |
784 (msr_me << MSR_ME) |
785 (msr_fe0 << MSR_FE0) |
786 (msr_se << MSR_SE) |
787 (msr_be << MSR_BE) |
788 (msr_fe1 << MSR_FE1) |
789 (msr_al << MSR_AL) |
790 (msr_ip << MSR_IP) |
791 (msr_ir << MSR_IR) |
792 (msr_dr << MSR_DR) |
793 (msr_pe << MSR_PE) |
794 (msr_px << MSR_PX) |
795 (msr_ri << MSR_RI) |
796 (msr_le << MSR_LE);
799 void do_compute_hflags (CPUPPCState *env)
801 /* Compute current hflags */
802 env->hflags = (msr_pr << MSR_PR) | (msr_le << MSR_LE) |
803 (msr_fp << MSR_FP) | (msr_fe0 << MSR_FE0) | (msr_fe1 << MSR_FE1) |
804 (msr_vr << MSR_VR) | (msr_ap << MSR_AP) | (msr_sa << MSR_SA) |
805 (msr_se << MSR_SE) | (msr_be << MSR_BE);
808 void do_store_msr (CPUPPCState *env, target_ulong value)
810 int enter_pm;
812 value &= env->msr_mask;
813 if (((value >> MSR_IR) & 1) != msr_ir ||
814 ((value >> MSR_DR) & 1) != msr_dr) {
815 /* Flush all tlb when changing translation mode
816 * When using software driven TLB, we may also need to reload
817 * all defined TLBs
819 tlb_flush(env, 1);
820 env->interrupt_request |= CPU_INTERRUPT_EXITTB;
822 #if 0
823 if (loglevel != 0) {
824 fprintf(logfile, "%s: T0 %08lx\n", __func__, value);
826 #endif
827 msr_vr = (value >> MSR_VR) & 1;
828 msr_ap = (value >> MSR_AP) & 1;
829 msr_sa = (value >> MSR_SA) & 1;
830 msr_key = (value >> MSR_KEY) & 1;
831 msr_pow = (value >> MSR_POW) & 1;
832 msr_tlb = (value >> MSR_TLB) & 1;
833 msr_ile = (value >> MSR_ILE) & 1;
834 msr_ee = (value >> MSR_EE) & 1;
835 msr_pr = (value >> MSR_PR) & 1;
836 msr_fp = (value >> MSR_FP) & 1;
837 msr_me = (value >> MSR_ME) & 1;
838 msr_fe0 = (value >> MSR_FE0) & 1;
839 msr_se = (value >> MSR_SE) & 1;
840 msr_be = (value >> MSR_BE) & 1;
841 msr_fe1 = (value >> MSR_FE1) & 1;
842 msr_al = (value >> MSR_AL) & 1;
843 msr_ip = (value >> MSR_IP) & 1;
844 msr_ir = (value >> MSR_IR) & 1;
845 msr_dr = (value >> MSR_DR) & 1;
846 msr_pe = (value >> MSR_PE) & 1;
847 msr_px = (value >> MSR_PX) & 1;
848 msr_ri = (value >> MSR_RI) & 1;
849 msr_le = (value >> MSR_LE) & 1;
850 do_compute_hflags(env);
852 enter_pm = 0;
853 switch (PPC_EXCP(env)) {
854 case PPC_FLAGS_EXCP_7x0:
855 if (msr_pow == 1 && (env->spr[SPR_HID0] & 0x00E00000) != 0)
856 enter_pm = 1;
857 break;
858 default:
859 break;
861 if (enter_pm) {
862 /* power save: exit cpu loop */
863 env->halted = 1;
864 env->exception_index = EXCP_HLT;
865 cpu_loop_exit();
869 float64 do_load_fpscr (CPUPPCState *env)
871 /* The 32 MSB of the target fpr are undefined.
872 * They'll be zero...
874 union {
875 float64 d;
876 struct {
877 uint32_t u[2];
878 } s;
879 } u;
880 int i;
882 #ifdef WORDS_BIGENDIAN
883 #define WORD0 0
884 #define WORD1 1
885 #else
886 #define WORD0 1
887 #define WORD1 0
888 #endif
889 u.s.u[WORD0] = 0;
890 u.s.u[WORD1] = 0;
891 for (i = 0; i < 8; i++)
892 u.s.u[WORD1] |= env->fpscr[i] << (4 * i);
893 return u.d;
896 void do_store_fpscr (CPUPPCState *env, float64 f, uint32_t mask)
899 * We use only the 32 LSB of the incoming fpr
901 union {
902 double d;
903 struct {
904 uint32_t u[2];
905 } s;
906 } u;
907 int i, rnd_type;
909 u.d = f;
910 if (mask & 0x80)
911 env->fpscr[0] = (env->fpscr[0] & 0x9) | ((u.s.u[WORD1] >> 28) & ~0x9);
912 for (i = 1; i < 7; i++) {
913 if (mask & (1 << (7 - i)))
914 env->fpscr[i] = (u.s.u[WORD1] >> (4 * (7 - i))) & 0xF;
916 /* TODO: update FEX & VX */
917 /* Set rounding mode */
918 switch (env->fpscr[0] & 0x3) {
919 case 0:
920 /* Best approximation (round to nearest) */
921 rnd_type = float_round_nearest_even;
922 break;
923 case 1:
924 /* Smaller magnitude (round toward zero) */
925 rnd_type = float_round_to_zero;
926 break;
927 case 2:
928 /* Round toward +infinite */
929 rnd_type = float_round_up;
930 break;
931 default:
932 case 3:
933 /* Round toward -infinite */
934 rnd_type = float_round_down;
935 break;
937 set_float_rounding_mode(rnd_type, &env->fp_status);
940 /*****************************************************************************/
941 /* Exception processing */
942 #if defined (CONFIG_USER_ONLY)
943 void do_interrupt (CPUState *env)
945 env->exception_index = -1;
947 #else
948 static void dump_syscall(CPUState *env)
950 fprintf(logfile, "syscall r0=0x%08x r3=0x%08x r4=0x%08x r5=0x%08x r6=0x%08x nip=0x%08x\n",
951 env->gpr[0], env->gpr[3], env->gpr[4],
952 env->gpr[5], env->gpr[6], env->nip);
955 void do_interrupt (CPUState *env)
957 target_ulong msr, *srr_0, *srr_1, tmp;
958 int excp;
960 excp = env->exception_index;
961 msr = do_load_msr(env);
962 /* The default is to use SRR0 & SRR1 to save the exception context */
963 srr_0 = &env->spr[SPR_SRR0];
964 srr_1 = &env->spr[SPR_SRR1];
965 #if defined (DEBUG_EXCEPTIONS)
966 if ((excp == EXCP_PROGRAM || excp == EXCP_DSI) && msr_pr == 1) {
967 if (loglevel != 0) {
968 fprintf(logfile, "Raise exception at 0x%08lx => 0x%08x (%02x)\n",
969 (unsigned long)env->nip, excp, env->error_code);
970 cpu_dump_state(env, logfile, fprintf, 0);
973 #endif
974 if (loglevel & CPU_LOG_INT) {
975 fprintf(logfile, "Raise exception at 0x%08lx => 0x%08x (%02x)\n",
976 (unsigned long)env->nip, excp, env->error_code);
978 msr_pow = 0;
979 /* Generate informations in save/restore registers */
980 switch (excp) {
981 /* Generic PowerPC exceptions */
982 case EXCP_RESET: /* 0x0100 */
983 if (PPC_EXCP(env) != PPC_FLAGS_EXCP_40x) {
984 if (msr_ip)
985 excp += 0xFFC00;
986 excp |= 0xFFC00000;
987 } else {
988 srr_0 = &env->spr[SPR_40x_SRR2];
989 srr_1 = &env->spr[SPR_40x_SRR3];
991 goto store_next;
992 case EXCP_MACHINE_CHECK: /* 0x0200 */
993 if (msr_me == 0) {
994 cpu_abort(env, "Machine check exception while not allowed\n");
996 if (PPC_EXCP(env) == PPC_FLAGS_EXCP_40x) {
997 srr_0 = &env->spr[SPR_40x_SRR2];
998 srr_1 = &env->spr[SPR_40x_SRR3];
1000 msr_me = 0;
1001 break;
1002 case EXCP_DSI: /* 0x0300 */
1003 /* Store exception cause */
1004 /* data location address has been stored
1005 * when the fault has been detected
1007 msr &= ~0xFFFF0000;
1008 #if defined (DEBUG_EXCEPTIONS)
1009 if (loglevel) {
1010 fprintf(logfile, "DSI exception: DSISR=0x%08x, DAR=0x%08x\n",
1011 env->spr[SPR_DSISR], env->spr[SPR_DAR]);
1012 } else {
1013 printf("DSI exception: DSISR=0x%08x, DAR=0x%08x\n",
1014 env->spr[SPR_DSISR], env->spr[SPR_DAR]);
1016 #endif
1017 goto store_next;
1018 case EXCP_ISI: /* 0x0400 */
1019 /* Store exception cause */
1020 msr &= ~0xFFFF0000;
1021 msr |= env->error_code;
1022 #if defined (DEBUG_EXCEPTIONS)
1023 if (loglevel != 0) {
1024 fprintf(logfile, "ISI exception: msr=0x%08x, nip=0x%08x\n",
1025 msr, env->nip);
1027 #endif
1028 goto store_next;
1029 case EXCP_EXTERNAL: /* 0x0500 */
1030 if (msr_ee == 0) {
1031 #if defined (DEBUG_EXCEPTIONS)
1032 if (loglevel > 0) {
1033 fprintf(logfile, "Skipping hardware interrupt\n");
1035 #endif
1036 /* Requeue it */
1037 env->interrupt_request |= CPU_INTERRUPT_HARD;
1038 return;
1040 goto store_next;
1041 case EXCP_ALIGN: /* 0x0600 */
1042 if (PPC_EXCP(env) != PPC_FLAGS_EXCP_601) {
1043 /* Store exception cause */
1044 /* Get rS/rD and rA from faulting opcode */
1045 env->spr[SPR_DSISR] |=
1046 (ldl_code((env->nip - 4)) & 0x03FF0000) >> 16;
1047 /* data location address has been stored
1048 * when the fault has been detected
1050 } else {
1051 /* IO error exception on PowerPC 601 */
1052 /* XXX: TODO */
1053 cpu_abort(env,
1054 "601 IO error exception is not implemented yet !\n");
1056 goto store_current;
1057 case EXCP_PROGRAM: /* 0x0700 */
1058 msr &= ~0xFFFF0000;
1059 switch (env->error_code & ~0xF) {
1060 case EXCP_FP:
1061 if (msr_fe0 == 0 && msr_fe1 == 0) {
1062 #if defined (DEBUG_EXCEPTIONS)
1063 printf("Ignore floating point exception\n");
1064 #endif
1065 return;
1067 msr |= 0x00100000;
1068 /* Set FX */
1069 env->fpscr[7] |= 0x8;
1070 /* Finally, update FEX */
1071 if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) &
1072 ((env->fpscr[1] << 1) | (env->fpscr[0] >> 3)))
1073 env->fpscr[7] |= 0x4;
1074 break;
1075 case EXCP_INVAL:
1076 // printf("Invalid instruction at 0x%08x\n", env->nip);
1077 msr |= 0x00080000;
1078 break;
1079 case EXCP_PRIV:
1080 msr |= 0x00040000;
1081 break;
1082 case EXCP_TRAP:
1083 msr |= 0x00020000;
1084 break;
1085 default:
1086 /* Should never occur */
1087 break;
1089 msr |= 0x00010000;
1090 goto store_current;
1091 case EXCP_NO_FP: /* 0x0800 */
1092 msr &= ~0xFFFF0000;
1093 goto store_current;
1094 case EXCP_DECR:
1095 if (msr_ee == 0) {
1096 #if 1
1097 /* Requeue it */
1098 env->interrupt_request |= CPU_INTERRUPT_TIMER;
1099 #endif
1100 return;
1102 goto store_next;
1103 case EXCP_SYSCALL: /* 0x0C00 */
1104 /* NOTE: this is a temporary hack to support graphics OSI
1105 calls from the MOL driver */
1106 if (env->gpr[3] == 0x113724fa && env->gpr[4] == 0x77810f9b &&
1107 env->osi_call) {
1108 if (env->osi_call(env) != 0)
1109 return;
1111 if (loglevel & CPU_LOG_INT) {
1112 dump_syscall(env);
1114 goto store_next;
1115 case EXCP_TRACE: /* 0x0D00 */
1116 /* XXX: TODO */
1117 cpu_abort(env, "Trace exception is not implemented yet !\n");
1118 goto store_next;
1119 case EXCP_PERF: /* 0x0F00 */
1120 /* XXX: TODO */
1121 cpu_abort(env,
1122 "Performance counter exception is not implemented yet !\n");
1123 goto store_next;
1124 /* 32 bits PowerPC specific exceptions */
1125 case EXCP_FP_ASSIST: /* 0x0E00 */
1126 /* XXX: TODO */
1127 cpu_abort(env, "Floating point assist exception "
1128 "is not implemented yet !\n");
1129 goto store_next;
1130 /* 64 bits PowerPC exceptions */
1131 case EXCP_DSEG: /* 0x0380 */
1132 /* XXX: TODO */
1133 cpu_abort(env, "Data segment exception is not implemented yet !\n");
1134 goto store_next;
1135 case EXCP_ISEG: /* 0x0480 */
1136 /* XXX: TODO */
1137 cpu_abort(env,
1138 "Instruction segment exception is not implemented yet !\n");
1139 goto store_next;
1140 case EXCP_HDECR: /* 0x0980 */
1141 if (msr_ee == 0) {
1142 #if 1
1143 /* Requeue it */
1144 env->interrupt_request |= CPU_INTERRUPT_TIMER;
1145 #endif
1146 return;
1148 cpu_abort(env,
1149 "Hypervisor decrementer exception is not implemented yet !\n");
1150 goto store_next;
1151 /* Implementation specific exceptions */
1152 case 0x0A00:
1153 if (PPC_EXCP(env) != PPC_FLAGS_EXCP_602) {
1154 /* Critical interrupt on G2 */
1155 /* XXX: TODO */
1156 cpu_abort(env, "G2 critical interrupt is not implemented yet !\n");
1157 goto store_next;
1158 } else {
1159 cpu_abort(env, "Invalid exception 0x0A00 !\n");
1161 return;
1162 case 0x0F20:
1163 switch (PPC_EXCP(env)) {
1164 case PPC_FLAGS_EXCP_40x:
1165 /* APU unavailable on 405 */
1166 /* XXX: TODO */
1167 cpu_abort(env,
1168 "APU unavailable exception is not implemented yet !\n");
1169 goto store_next;
1170 case PPC_FLAGS_EXCP_74xx:
1171 /* Altivec unavailable */
1172 /* XXX: TODO */
1173 cpu_abort(env, "Altivec unavailable exception "
1174 "is not implemented yet !\n");
1175 goto store_next;
1176 default:
1177 cpu_abort(env, "Invalid exception 0x0F20 !\n");
1178 break;
1180 return;
1181 case 0x1000:
1182 switch (PPC_EXCP(env)) {
1183 case PPC_FLAGS_EXCP_40x:
1184 /* PIT on 4xx */
1185 /* XXX: TODO */
1186 cpu_abort(env, "40x PIT exception is not implemented yet !\n");
1187 goto store_next;
1188 case PPC_FLAGS_EXCP_602:
1189 case PPC_FLAGS_EXCP_603:
1190 /* ITLBMISS on 602/603 */
1191 msr &= ~0xF00F0000;
1192 msr_tgpr = 1;
1193 goto store_gprs;
1194 default:
1195 cpu_abort(env, "Invalid exception 0x1000 !\n");
1196 break;
1198 return;
1199 case 0x1010:
1200 switch (PPC_EXCP(env)) {
1201 case PPC_FLAGS_EXCP_40x:
1202 /* FIT on 4xx */
1203 cpu_abort(env, "40x FIT exception is not implemented yet !\n");
1204 /* XXX: TODO */
1205 goto store_next;
1206 default:
1207 cpu_abort(env, "Invalid exception 0x1010 !\n");
1208 break;
1210 return;
1211 case 0x1020:
1212 switch (PPC_EXCP(env)) {
1213 case PPC_FLAGS_EXCP_40x:
1214 /* Watchdog on 4xx */
1215 /* XXX: TODO */
1216 cpu_abort(env,
1217 "40x watchdog exception is not implemented yet !\n");
1218 goto store_next;
1219 default:
1220 cpu_abort(env, "Invalid exception 0x1020 !\n");
1221 break;
1223 return;
1224 case 0x1100:
1225 switch (PPC_EXCP(env)) {
1226 case PPC_FLAGS_EXCP_40x:
1227 /* DTLBMISS on 4xx */
1228 /* XXX: TODO */
1229 cpu_abort(env,
1230 "40x DTLBMISS exception is not implemented yet !\n");
1231 goto store_next;
1232 case PPC_FLAGS_EXCP_602:
1233 case PPC_FLAGS_EXCP_603:
1234 /* DLTLBMISS on 602/603 */
1235 msr &= ~0xF00F0000;
1236 msr_tgpr = 1;
1237 goto store_gprs;
1238 default:
1239 cpu_abort(env, "Invalid exception 0x1100 !\n");
1240 break;
1242 return;
1243 case 0x1200:
1244 switch (PPC_EXCP(env)) {
1245 case PPC_FLAGS_EXCP_40x:
1246 /* ITLBMISS on 4xx */
1247 /* XXX: TODO */
1248 cpu_abort(env,
1249 "40x ITLBMISS exception is not implemented yet !\n");
1250 goto store_next;
1251 case PPC_FLAGS_EXCP_602:
1252 case PPC_FLAGS_EXCP_603:
1253 /* DSTLBMISS on 602/603 */
1254 msr &= ~0xF00F0000;
1255 msr_tgpr = 1;
1256 store_gprs:
1257 #if defined (DEBUG_SOFTWARE_TLB)
1258 if (loglevel != 0) {
1259 fprintf(logfile, "6xx %sTLB miss: IM %08x DM %08x IC %08x "
1260 "DC %08x H1 %08x H2 %08x %08x\n",
1261 excp == 0x1000 ? "I" : excp == 0x1100 ? "DL" : "DS",
1262 env->spr[SPR_IMISS], env->spr[SPR_DMISS],
1263 env->spr[SPR_ICMP], env->spr[SPR_DCMP],
1264 env->spr[SPR_DHASH1], env->spr[SPR_DHASH2],
1265 env->error_code);
1267 #endif
1268 /* Swap temporary saved registers with GPRs */
1269 tmp = env->gpr[0];
1270 env->gpr[0] = env->tgpr[0];
1271 env->tgpr[0] = tmp;
1272 tmp = env->gpr[1];
1273 env->gpr[1] = env->tgpr[1];
1274 env->tgpr[1] = tmp;
1275 tmp = env->gpr[2];
1276 env->gpr[2] = env->tgpr[2];
1277 env->tgpr[2] = tmp;
1278 tmp = env->gpr[3];
1279 env->gpr[3] = env->tgpr[3];
1280 env->tgpr[3] = tmp;
1281 msr |= env->crf[0] << 28;
1282 msr |= env->error_code; /* key, D/I, S/L bits */
1283 /* Set way using a LRU mechanism */
1284 msr |= (env->last_way ^ 1) << 17;
1285 goto store_next;
1286 default:
1287 cpu_abort(env, "Invalid exception 0x1200 !\n");
1288 break;
1290 return;
1291 case 0x1300:
1292 switch (PPC_EXCP(env)) {
1293 case PPC_FLAGS_EXCP_601:
1294 case PPC_FLAGS_EXCP_602:
1295 case PPC_FLAGS_EXCP_603:
1296 case PPC_FLAGS_EXCP_604:
1297 case PPC_FLAGS_EXCP_7x0:
1298 case PPC_FLAGS_EXCP_7x5:
1299 /* IABR on 6xx/7xx */
1300 /* XXX: TODO */
1301 cpu_abort(env, "IABR exception is not implemented yet !\n");
1302 goto store_next;
1303 default:
1304 cpu_abort(env, "Invalid exception 0x1300 !\n");
1305 break;
1307 return;
1308 case 0x1400:
1309 switch (PPC_EXCP(env)) {
1310 case PPC_FLAGS_EXCP_601:
1311 case PPC_FLAGS_EXCP_602:
1312 case PPC_FLAGS_EXCP_603:
1313 case PPC_FLAGS_EXCP_604:
1314 case PPC_FLAGS_EXCP_7x0:
1315 case PPC_FLAGS_EXCP_7x5:
1316 /* SMI on 6xx/7xx */
1317 /* XXX: TODO */
1318 cpu_abort(env, "SMI exception is not implemented yet !\n");
1319 goto store_next;
1320 default:
1321 cpu_abort(env, "Invalid exception 0x1400 !\n");
1322 break;
1324 return;
1325 case 0x1500:
1326 switch (PPC_EXCP(env)) {
1327 case PPC_FLAGS_EXCP_602:
1328 /* Watchdog on 602 */
1329 cpu_abort(env,
1330 "602 watchdog exception is not implemented yet !\n");
1331 goto store_next;
1332 case PPC_FLAGS_EXCP_970:
1333 /* Soft patch exception on 970 */
1334 /* XXX: TODO */
1335 cpu_abort(env,
1336 "970 soft-patch exception is not implemented yet !\n");
1337 goto store_next;
1338 case PPC_FLAGS_EXCP_74xx:
1339 /* VPU assist on 74xx */
1340 /* XXX: TODO */
1341 cpu_abort(env, "VPU assist exception is not implemented yet !\n");
1342 goto store_next;
1343 default:
1344 cpu_abort(env, "Invalid exception 0x1500 !\n");
1345 break;
1347 return;
1348 case 0x1600:
1349 switch (PPC_EXCP(env)) {
1350 case PPC_FLAGS_EXCP_602:
1351 /* Emulation trap on 602 */
1352 /* XXX: TODO */
1353 cpu_abort(env, "602 emulation trap exception "
1354 "is not implemented yet !\n");
1355 goto store_next;
1356 case PPC_FLAGS_EXCP_970:
1357 /* Maintenance exception on 970 */
1358 /* XXX: TODO */
1359 cpu_abort(env,
1360 "970 maintenance exception is not implemented yet !\n");
1361 goto store_next;
1362 default:
1363 cpu_abort(env, "Invalid exception 0x1600 !\n");
1364 break;
1366 return;
1367 case 0x1700:
1368 switch (PPC_EXCP(env)) {
1369 case PPC_FLAGS_EXCP_7x0:
1370 case PPC_FLAGS_EXCP_7x5:
1371 /* Thermal management interrupt on G3 */
1372 /* XXX: TODO */
1373 cpu_abort(env, "G3 thermal management exception "
1374 "is not implemented yet !\n");
1375 goto store_next;
1376 case PPC_FLAGS_EXCP_970:
1377 /* VPU assist on 970 */
1378 /* XXX: TODO */
1379 cpu_abort(env,
1380 "970 VPU assist exception is not implemented yet !\n");
1381 goto store_next;
1382 default:
1383 cpu_abort(env, "Invalid exception 0x1700 !\n");
1384 break;
1386 return;
1387 case 0x1800:
1388 switch (PPC_EXCP(env)) {
1389 case PPC_FLAGS_EXCP_970:
1390 /* Thermal exception on 970 */
1391 /* XXX: TODO */
1392 cpu_abort(env, "970 thermal management exception "
1393 "is not implemented yet !\n");
1394 goto store_next;
1395 default:
1396 cpu_abort(env, "Invalid exception 0x1800 !\n");
1397 break;
1399 return;
1400 case 0x2000:
1401 switch (PPC_EXCP(env)) {
1402 case PPC_FLAGS_EXCP_40x:
1403 /* DEBUG on 4xx */
1404 /* XXX: TODO */
1405 cpu_abort(env, "40x debug exception is not implemented yet !\n");
1406 goto store_next;
1407 case PPC_FLAGS_EXCP_601:
1408 /* Run mode exception on 601 */
1409 /* XXX: TODO */
1410 cpu_abort(env,
1411 "601 run mode exception is not implemented yet !\n");
1412 goto store_next;
1413 default:
1414 cpu_abort(env, "Invalid exception 0x1800 !\n");
1415 break;
1417 return;
1418 /* Other exceptions */
1419 /* Qemu internal exceptions:
1420 * we should never come here with those values: abort execution
1422 default:
1423 cpu_abort(env, "Invalid exception: code %d (%04x)\n", excp, excp);
1424 return;
1425 store_current:
1426 /* save current instruction location */
1427 *srr_0 = (env->nip - 4) & 0xFFFFFFFFULL;
1428 break;
1429 store_next:
1430 /* save next instruction location */
1431 *srr_0 = env->nip & 0xFFFFFFFFULL;
1432 break;
1434 /* Save msr */
1435 *srr_1 = msr;
1436 /* If we disactivated any translation, flush TLBs */
1437 if (msr_ir || msr_dr) {
1438 tlb_flush(env, 1);
1440 /* reload MSR with correct bits */
1441 msr_ee = 0;
1442 msr_pr = 0;
1443 msr_fp = 0;
1444 msr_fe0 = 0;
1445 msr_se = 0;
1446 msr_be = 0;
1447 msr_fe1 = 0;
1448 msr_ir = 0;
1449 msr_dr = 0;
1450 msr_ri = 0;
1451 msr_le = msr_ile;
1452 msr_sf = msr_isf;
1453 do_compute_hflags(env);
1454 /* Jump to handler */
1455 env->nip = excp;
1456 env->exception_index = EXCP_NONE;
1458 #endif /* !CONFIG_USER_ONLY */