2 * MIPS emulation helpers for qemu.
4 * Copyright (c) 2004-2005 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
23 #define GETPC() (__builtin_return_address(0))
25 /*****************************************************************************/
26 /* Exceptions processing helpers */
27 void cpu_loop_exit(void)
29 longjmp(env->jmp_env, 1);
32 void do_raise_exception_err (uint32_t exception, int error_code)
35 if (logfile && exception < 0x100)
36 fprintf(logfile, "%s: %d %d\n", __func__, exception, error_code);
38 env->exception_index = exception;
39 env->error_code = error_code;
44 void do_raise_exception (uint32_t exception)
46 do_raise_exception_err(exception, 0);
49 void do_restore_state (void *pc_ptr)
52 unsigned long pc = (unsigned long) pc_ptr;
55 cpu_restore_state (tb, env, pc, NULL);
58 void do_raise_exception_direct_err (uint32_t exception, int error_code)
60 do_restore_state (GETPC ());
61 do_raise_exception_err (exception, error_code);
64 void do_raise_exception_direct (uint32_t exception)
66 do_raise_exception_direct_err (exception, 0);
69 #define MEMSUFFIX _raw
70 #include "op_helper_mem.c"
72 #if !defined(CONFIG_USER_ONLY)
73 #define MEMSUFFIX _user
74 #include "op_helper_mem.c"
76 #define MEMSUFFIX _kernel
77 #include "op_helper_mem.c"
82 #if TARGET_LONG_BITS > HOST_LONG_BITS
83 /* Those might call libgcc functions. */
96 T0 = (int64_t)T0 >> T1;
101 T0 = (int64_t)T0 >> (T1 + 32);
109 void do_dsrl32 (void)
111 T0 = T0 >> (T1 + 32);
119 tmp = T0 << (0x40 - T1);
120 T0 = (T0 >> T1) | tmp;
124 void do_drotr32 (void)
129 tmp = T0 << (0x40 - (32 + T1));
130 T0 = (T0 >> (32 + T1)) | tmp;
136 T0 = T1 << (T0 & 0x3F);
141 T0 = (int64_t)T1 >> (T0 & 0x3F);
146 T0 = T1 >> (T0 & 0x3F);
149 void do_drotrv (void)
155 tmp = T1 << (0x40 - T0);
156 T0 = (T1 >> T0) | tmp;
160 #endif /* TARGET_LONG_BITS > HOST_LONG_BITS */
161 #endif /* TARGET_MIPS64 */
163 /* 64 bits arithmetic for 32 bits hosts */
164 #if TARGET_LONG_BITS > HOST_LONG_BITS
165 static inline uint64_t get_HILO (void)
167 return (env->HI << 32) | (uint32_t)env->LO;
170 static inline void set_HILO (uint64_t HILO)
172 env->LO = (int32_t)HILO;
173 env->HI = (int32_t)(HILO >> 32);
178 set_HILO((int64_t)(int32_t)T0 * (int64_t)(int32_t)T1);
183 set_HILO((uint64_t)(uint32_t)T0 * (uint64_t)(uint32_t)T1);
190 tmp = ((int64_t)(int32_t)T0 * (int64_t)(int32_t)T1);
191 set_HILO((int64_t)get_HILO() + tmp);
198 tmp = ((uint64_t)(uint32_t)T0 * (uint64_t)(uint32_t)T1);
199 set_HILO(get_HILO() + tmp);
206 tmp = ((int64_t)(int32_t)T0 * (int64_t)(int32_t)T1);
207 set_HILO((int64_t)get_HILO() - tmp);
214 tmp = ((uint64_t)(uint32_t)T0 * (uint64_t)(uint32_t)T1);
215 set_HILO(get_HILO() - tmp);
219 #if HOST_LONG_BITS < 64
222 /* 64bit datatypes because we may see overflow/underflow. */
224 env->LO = (int32_t)((int64_t)(int32_t)T0 / (int32_t)T1);
225 env->HI = (int32_t)((int64_t)(int32_t)T0 % (int32_t)T1);
233 env->LO = (int64_t)T0 * (int64_t)T1;
235 env->HI = (env->LO | (1ULL << 63)) ? ~0ULL : 0ULL;
238 void do_dmultu (void)
248 lldiv_t res = lldiv((int64_t)T0, (int64_t)T1);
258 lldiv_t res = lldiv(T0, T1);
259 env->LO = (uint64_t)res.quot;
260 env->HI = (uint64_t)res.rem;
265 #if defined(CONFIG_USER_ONLY)
266 void do_mfc0_random (void)
268 cpu_abort(env, "mfc0 random\n");
271 void do_mfc0_count (void)
273 cpu_abort(env, "mfc0 count\n");
276 void cpu_mips_store_count(CPUState *env, uint32_t value)
278 cpu_abort(env, "mtc0 count\n");
281 void cpu_mips_store_compare(CPUState *env, uint32_t value)
283 cpu_abort(env, "mtc0 compare\n");
286 void cpu_mips_update_irq(CPUState *env)
288 cpu_abort(env, "mtc0 status / mtc0 cause\n");
291 void do_mtc0_status_debug(uint32_t old, uint32_t val)
293 cpu_abort(env, "mtc0 status debug\n");
296 void do_mtc0_status_irqraise_debug (void)
298 cpu_abort(env, "mtc0 status irqraise debug\n");
303 cpu_abort(env, "tlbwi\n");
308 cpu_abort(env, "tlbwr\n");
313 cpu_abort(env, "tlbp\n");
318 cpu_abort(env, "tlbr\n");
321 void cpu_mips_tlb_flush (CPUState *env, int flush_global)
323 cpu_abort(env, "mips_tlb_flush\n");
329 void do_mfc0_random (void)
331 T0 = (int32_t)cpu_mips_get_random(env);
334 void do_mfc0_count (void)
336 T0 = (int32_t)cpu_mips_get_count(env);
339 void do_mtc0_status_debug(uint32_t old, uint32_t val)
341 fprintf(logfile, "Status %08x (%08x) => %08x (%08x) Cause %08x",
342 old, old & env->CP0_Cause & CP0Ca_IP_mask,
343 val, val & env->CP0_Cause & CP0Ca_IP_mask,
345 (env->hflags & MIPS_HFLAG_UM) ? fputs(", UM\n", logfile)
346 : fputs("\n", logfile);
349 void do_mtc0_status_irqraise_debug(void)
351 fprintf(logfile, "Raise pending IRQs\n");
354 void fpu_handle_exception(void)
356 #ifdef CONFIG_SOFTFLOAT
357 int flags = get_float_exception_flags(&env->fp_status);
358 unsigned int cpuflags = 0, enable, cause = 0;
360 enable = GET_FP_ENABLE(env->fcr31);
362 /* determine current flags */
363 if (flags & float_flag_invalid) {
364 cpuflags |= FP_INVALID;
365 cause |= FP_INVALID & enable;
367 if (flags & float_flag_divbyzero) {
369 cause |= FP_DIV0 & enable;
371 if (flags & float_flag_overflow) {
372 cpuflags |= FP_OVERFLOW;
373 cause |= FP_OVERFLOW & enable;
375 if (flags & float_flag_underflow) {
376 cpuflags |= FP_UNDERFLOW;
377 cause |= FP_UNDERFLOW & enable;
379 if (flags & float_flag_inexact) {
380 cpuflags |= FP_INEXACT;
381 cause |= FP_INEXACT & enable;
383 SET_FP_FLAGS(env->fcr31, cpuflags);
384 SET_FP_CAUSE(env->fcr31, cause);
386 SET_FP_FLAGS(env->fcr31, 0);
387 SET_FP_CAUSE(env->fcr31, 0);
392 #if defined(MIPS_USES_R4K_TLB)
393 void cpu_mips_tlb_flush (CPUState *env, int flush_global)
395 /* Flush qemu's TLB and discard all shadowed entries. */
396 tlb_flush (env, flush_global);
397 env->tlb_in_use = env->nb_tlb;
400 static void mips_tlb_flush_extra (CPUState *env, int first)
402 /* Discard entries from env->tlb[first] onwards. */
403 while (env->tlb_in_use > first) {
404 invalidate_tlb(env, --env->tlb_in_use, 0);
408 static void fill_tlb (int idx)
412 /* XXX: detect conflicting TLBs and raise a MCHECK exception when needed */
413 tlb = &env->tlb[idx];
414 tlb->VPN = env->CP0_EntryHi & ~(target_ulong)0x1FFF;
415 tlb->ASID = env->CP0_EntryHi & 0xFF;
416 tlb->PageMask = env->CP0_PageMask;
417 tlb->G = env->CP0_EntryLo0 & env->CP0_EntryLo1 & 1;
418 tlb->V0 = (env->CP0_EntryLo0 & 2) != 0;
419 tlb->D0 = (env->CP0_EntryLo0 & 4) != 0;
420 tlb->C0 = (env->CP0_EntryLo0 >> 3) & 0x7;
421 tlb->PFN[0] = (env->CP0_EntryLo0 >> 6) << 12;
422 tlb->V1 = (env->CP0_EntryLo1 & 2) != 0;
423 tlb->D1 = (env->CP0_EntryLo1 & 4) != 0;
424 tlb->C1 = (env->CP0_EntryLo1 >> 3) & 0x7;
425 tlb->PFN[1] = (env->CP0_EntryLo1 >> 6) << 12;
430 /* Discard cached TLB entries. We could avoid doing this if the
431 tlbwi is just upgrading access permissions on the current entry;
432 that might be a further win. */
433 mips_tlb_flush_extra (env, env->nb_tlb);
435 invalidate_tlb(env, env->CP0_Index % env->nb_tlb, 0);
436 fill_tlb(env->CP0_Index % env->nb_tlb);
441 int r = cpu_mips_get_random(env);
443 invalidate_tlb(env, r, 1);
454 tag = env->CP0_EntryHi & (int32_t)0xFFFFE000;
455 ASID = env->CP0_EntryHi & 0xFF;
456 for (i = 0; i < env->nb_tlb; i++) {
458 /* Check ASID, virtual page number & size */
459 if ((tlb->G == 1 || tlb->ASID == ASID) && tlb->VPN == tag) {
465 if (i == env->nb_tlb) {
466 /* No match. Discard any shadow entries, if any of them match. */
467 for (i = env->nb_tlb; i < env->tlb_in_use; i++) {
470 /* Check ASID, virtual page number & size */
471 if ((tlb->G == 1 || tlb->ASID == ASID) && tlb->VPN == tag) {
472 mips_tlb_flush_extra (env, i);
477 env->CP0_Index |= 0x80000000;
486 ASID = env->CP0_EntryHi & 0xFF;
487 tlb = &env->tlb[env->CP0_Index % env->nb_tlb];
489 /* If this will change the current ASID, flush qemu's TLB. */
490 if (ASID != tlb->ASID)
491 cpu_mips_tlb_flush (env, 1);
493 mips_tlb_flush_extra(env, env->nb_tlb);
495 env->CP0_EntryHi = tlb->VPN | tlb->ASID;
496 env->CP0_PageMask = tlb->PageMask;
497 env->CP0_EntryLo0 = tlb->G | (tlb->V0 << 1) | (tlb->D0 << 2) |
498 (tlb->C0 << 3) | (tlb->PFN[0] >> 6);
499 env->CP0_EntryLo1 = tlb->G | (tlb->V1 << 1) | (tlb->D1 << 2) |
500 (tlb->C1 << 3) | (tlb->PFN[1] >> 6);
504 #endif /* !CONFIG_USER_ONLY */
506 void dump_ldst (const unsigned char *func)
509 fprintf(logfile, "%s => " TARGET_FMT_lx " " TARGET_FMT_lx "\n", __func__, T0, T1);
515 fprintf(logfile, "%s " TARGET_FMT_lx " at " TARGET_FMT_lx " (" TARGET_FMT_lx ")\n", __func__,
516 T1, T0, env->CP0_LLAddr);
520 void debug_pre_eret (void)
522 fprintf(logfile, "ERET: PC " TARGET_FMT_lx " EPC " TARGET_FMT_lx,
523 env->PC, env->CP0_EPC);
524 if (env->CP0_Status & (1 << CP0St_ERL))
525 fprintf(logfile, " ErrorEPC " TARGET_FMT_lx, env->CP0_ErrorEPC);
526 if (env->hflags & MIPS_HFLAG_DM)
527 fprintf(logfile, " DEPC " TARGET_FMT_lx, env->CP0_DEPC);
528 fputs("\n", logfile);
531 void debug_post_eret (void)
533 fprintf(logfile, " => PC " TARGET_FMT_lx " EPC " TARGET_FMT_lx,
534 env->PC, env->CP0_EPC);
535 if (env->CP0_Status & (1 << CP0St_ERL))
536 fprintf(logfile, " ErrorEPC " TARGET_FMT_lx, env->CP0_ErrorEPC);
537 if (env->hflags & MIPS_HFLAG_DM)
538 fprintf(logfile, " DEPC " TARGET_FMT_lx, env->CP0_DEPC);
539 if (env->hflags & MIPS_HFLAG_UM)
540 fputs(", UM\n", logfile);
542 fputs("\n", logfile);
545 void do_pmon (int function)
549 case 2: /* TODO: char inbyte(int waitflag); */
550 if (env->gpr[4] == 0)
553 case 11: /* TODO: char inbyte (void); */
558 printf("%c", (char)(env->gpr[4] & 0xFF));
564 unsigned char *fmt = (void *)(unsigned long)env->gpr[4];
571 #if !defined(CONFIG_USER_ONLY)
573 static void do_unaligned_access (target_ulong addr, int is_write, int is_user, void *retaddr);
575 #define MMUSUFFIX _mmu
579 #include "softmmu_template.h"
582 #include "softmmu_template.h"
585 #include "softmmu_template.h"
588 #include "softmmu_template.h"
590 static void do_unaligned_access (target_ulong addr, int is_write, int is_user, void *retaddr)
592 env->CP0_BadVAddr = addr;
593 do_restore_state (retaddr);
594 do_raise_exception ((is_write == 1) ? EXCP_AdES : EXCP_AdEL);
597 void tlb_fill (target_ulong addr, int is_write, int is_user, void *retaddr)
599 TranslationBlock *tb;
604 /* XXX: hack to restore env in all cases, even if not called from
607 env = cpu_single_env;
608 ret = cpu_mips_handle_mmu_fault(env, addr, is_write, is_user, 1);
611 /* now we have a real cpu fault */
612 pc = (unsigned long)retaddr;
615 /* the PC is inside the translated code. It means that we have
616 a virtual CPU fault */
617 cpu_restore_state(tb, env, pc, NULL);
620 do_raise_exception_err(env->exception_index, env->error_code);