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 MIPS_DEBUG_DISAS
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 #define MEMSUFFIX _raw
50 #include "op_helper_mem.c"
52 #if !defined(CONFIG_USER_ONLY)
53 #define MEMSUFFIX _user
54 #include "op_helper_mem.c"
56 #define MEMSUFFIX _kernel
57 #include "op_helper_mem.c"
61 /* 64 bits arithmetic for 32 bits hosts */
62 #if (HOST_LONG_BITS == 32)
63 static inline uint64_t get_HILO (void)
65 return ((uint64_t)env->HI << 32) | (uint64_t)env->LO;
68 static inline void set_HILO (uint64_t HILO)
70 env->LO = HILO & 0xFFFFFFFF;
76 set_HILO((int64_t)T0 * (int64_t)T1);
81 set_HILO((uint64_t)T0 * (uint64_t)T1);
88 tmp = ((int64_t)T0 * (int64_t)T1);
89 set_HILO((int64_t)get_HILO() + tmp);
96 tmp = ((uint64_t)T0 * (uint64_t)T1);
97 set_HILO(get_HILO() + tmp);
104 tmp = ((int64_t)T0 * (int64_t)T1);
105 set_HILO((int64_t)get_HILO() - tmp);
112 tmp = ((uint64_t)T0 * (uint64_t)T1);
113 set_HILO(get_HILO() - tmp);
118 void do_mfc0 (int reg, int sel)
120 const unsigned char *rn;
122 if (sel != 0 && reg != 16 && reg != 28) {
132 T0 = cpu_mips_get_random(env);
136 T0 = env->CP0_EntryLo0;
140 T0 = env->CP0_EntryLo1;
144 T0 = env->CP0_Context;
148 T0 = env->CP0_PageMask;
156 T0 = env->CP0_BadVAddr;
160 T0 = cpu_mips_get_count(env);
164 T0 = env->CP0_EntryHi;
168 T0 = env->CP0_Compare;
172 T0 = env->CP0_Status;
173 if (env->hflags & MIPS_HFLAG_UM)
174 T0 |= (1 << CP0St_UM);
175 if (env->hflags & MIPS_HFLAG_ERL)
176 T0 |= (1 << CP0St_ERL);
177 if (env->hflags & MIPS_HFLAG_EXL)
178 T0 |= (1 << CP0St_EXL);
196 T0 = env->CP0_Config0;
200 T0 = env->CP0_Config1;
204 rn = "Unknown config register";
209 T0 = env->CP0_LLAddr >> 4;
213 T0 = env->CP0_WatchLo;
217 T0 = env->CP0_WatchHi;
222 if (env->hflags & MIPS_HFLAG_DM)
237 T0 = env->CP0_DataLo;
246 T0 = env->CP0_ErrorEPC;
250 T0 = env->CP0_DESAVE;
258 #if defined MIPS_DEBUG_DISAS
259 if (loglevel & CPU_LOG_TB_IN_ASM) {
260 fprintf(logfile, "%08x mfc0 %s => %08x (%d %d)\n",
261 env->PC, rn, T0, reg, sel);
267 void do_mtc0 (int reg, int sel)
269 const unsigned char *rn;
270 uint32_t val, old, mask;
272 if (sel != 0 && reg != 16 && reg != 28) {
280 val = (env->CP0_index & 0x80000000) | (T0 & 0x0000000F);
281 old = env->CP0_index;
282 env->CP0_index = val;
286 val = T0 & 0x03FFFFFFF;
287 old = env->CP0_EntryLo0;
288 env->CP0_EntryLo0 = val;
292 val = T0 & 0x03FFFFFFF;
293 old = env->CP0_EntryLo1;
294 env->CP0_EntryLo1 = val;
298 val = (env->CP0_Context & 0xFF000000) | (T0 & 0x00FFFFF0);
299 old = env->CP0_Context;
300 env->CP0_Context = val;
304 val = T0 & 0x01FFE000;
305 old = env->CP0_PageMask;
306 env->CP0_PageMask = val;
310 val = T0 & 0x0000000F;
311 old = env->CP0_Wired;
312 env->CP0_Wired = val;
317 old = cpu_mips_get_count(env);
318 cpu_mips_store_count(env, val);
322 val = T0 & 0xFFFFF0FF;
323 old = env->CP0_EntryHi;
324 env->CP0_EntryHi = val;
329 old = env->CP0_Compare;
330 cpu_mips_store_compare(env, val);
334 val = T0 & 0xFA78FF01;
335 if (T0 & (1 << CP0St_UM))
336 env->hflags |= MIPS_HFLAG_UM;
338 env->hflags &= ~MIPS_HFLAG_UM;
339 if (T0 & (1 << CP0St_ERL))
340 env->hflags |= MIPS_HFLAG_ERL;
342 env->hflags &= ~MIPS_HFLAG_ERL;
343 if (T0 & (1 << CP0St_EXL))
344 env->hflags |= MIPS_HFLAG_EXL;
346 env->hflags &= ~MIPS_HFLAG_EXL;
347 old = env->CP0_Status;
348 env->CP0_Status = val;
349 /* If we unmasked an asserted IRQ, raise it */
351 if (loglevel & CPU_LOG_TB_IN_ASM) {
352 fprintf(logfile, "Status %08x => %08x Cause %08x (%08x %08x %08x)\n",
353 old, val, env->CP0_Cause, old & mask, val & mask,
354 env->CP0_Cause & mask);
357 if ((val & (1 << CP0St_IE)) && !(old & (1 << CP0St_IE)) &&
358 !(env->hflags & MIPS_HFLAG_EXL) &&
359 !(env->hflags & MIPS_HFLAG_ERL) &&
360 !(env->hflags & MIPS_HFLAG_DM) &&
361 (env->CP0_Status & env->CP0_Cause & mask)) {
363 fprintf(logfile, "Raise pending IRQs\n");
364 env->interrupt_request |= CPU_INTERRUPT_HARD;
365 do_raise_exception(EXCP_EXT_INTERRUPT);
366 } else if (!(val & 0x00000001) && (old & 0x00000001)) {
367 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
373 val = (env->CP0_Cause & 0xB000F87C) | (T0 & 0x000C00300);
374 old = env->CP0_Cause;
375 env->CP0_Cause = val;
379 /* Check if we ever asserted a software IRQ */
380 for (i = 0; i < 2; i++) {
382 if ((val & mask) & !(old & mask))
398 #if defined(MIPS_USES_R4K_TLB)
399 val = (env->CP0_Config0 & 0x8017FF80) | (T0 & 0x7E000001);
401 val = (env->CP0_Config0 & 0xFE17FF80) | (T0 & 0x00000001);
403 old = env->CP0_Config0;
404 env->CP0_Config0 = val;
410 rn = "bad config selector";
416 old = env->CP0_WatchLo;
417 env->CP0_WatchLo = val;
421 val = T0 & 0x40FF0FF8;
422 old = env->CP0_WatchHi;
423 env->CP0_WatchHi = val;
427 val = (env->CP0_Debug & 0x8C03FC1F) | (T0 & 0x13300120);
428 if (T0 & (1 << CP0DB_DM))
429 env->hflags |= MIPS_HFLAG_DM;
431 env->hflags &= ~MIPS_HFLAG_DM;
432 old = env->CP0_Debug;
433 env->CP0_Debug = val;
445 val = T0 & 0xFFFFFCF6;
446 old = env->CP0_TagLo;
447 env->CP0_TagLo = val;
459 old = env->CP0_ErrorEPC;
460 env->CP0_ErrorEPC = val;
465 old = env->CP0_DESAVE;
466 env->CP0_DESAVE = val;
476 #if defined MIPS_DEBUG_DISAS
477 if (loglevel & CPU_LOG_TB_IN_ASM) {
478 fprintf(logfile, "%08x mtc0 %s %08x => %08x (%d %d %08x)\n",
479 env->PC, rn, T0, val, reg, sel, old);
486 #if defined(MIPS_USES_R4K_TLB)
487 static void invalidate_tb (int idx)
490 target_ulong addr, end;
492 tlb = &env->tlb[idx];
495 end = addr + (tlb->end - tlb->VPN);
496 tb_invalidate_page_range(addr, end);
500 end = addr + (tlb->end - tlb->VPN);
501 tb_invalidate_page_range(addr, end);
505 static void fill_tb (int idx)
510 /* XXX: detect conflicting TLBs and raise a MCHECK exception when needed */
511 tlb = &env->tlb[idx];
512 tlb->VPN = env->CP0_EntryHi & 0xFFFFE000;
513 tlb->ASID = env->CP0_EntryHi & 0x000000FF;
514 size = env->CP0_PageMask >> 13;
515 size = 4 * (size + 1);
516 tlb->end = tlb->VPN + (1 << (8 + size));
517 tlb->G = env->CP0_EntryLo0 & env->CP0_EntryLo1 & 1;
518 tlb->V[0] = env->CP0_EntryLo0 & 2;
519 tlb->D[0] = env->CP0_EntryLo0 & 4;
520 tlb->C[0] = (env->CP0_EntryLo0 >> 3) & 0x7;
521 tlb->PFN[0] = (env->CP0_EntryLo0 >> 6) << 12;
522 tlb->V[1] = env->CP0_EntryLo1 & 2;
523 tlb->D[1] = env->CP0_EntryLo1 & 4;
524 tlb->C[1] = (env->CP0_EntryLo1 >> 3) & 0x7;
525 tlb->PFN[1] = (env->CP0_EntryLo1 >> 6) << 12;
530 /* Wildly undefined effects for CP0_index containing a too high value and
531 MIPS_TLB_NB not being a power of two. But so does real silicon. */
532 invalidate_tb(env->CP0_index & (MIPS_TLB_NB - 1));
533 fill_tb(env->CP0_index & (MIPS_TLB_NB - 1));
538 int r = cpu_mips_get_random(env);
551 tag = (env->CP0_EntryHi & 0xFFFFE000);
552 ASID = env->CP0_EntryHi & 0x000000FF;
553 for (i = 0; i < MIPS_TLB_NB; i++) {
555 /* Check ASID, virtual page number & size */
556 if ((tlb->G == 1 || tlb->ASID == ASID) && tlb->VPN == tag) {
562 if (i == MIPS_TLB_NB) {
563 env->CP0_index |= 0x80000000;
572 tlb = &env->tlb[env->CP0_index & (MIPS_TLB_NB - 1)];
573 env->CP0_EntryHi = tlb->VPN | tlb->ASID;
574 size = (tlb->end - tlb->VPN) >> 12;
575 env->CP0_PageMask = (size - 1) << 13;
576 env->CP0_EntryLo0 = tlb->V[0] | tlb->D[0] | (tlb->C[0] << 3) |
578 env->CP0_EntryLo1 = tlb->V[1] | tlb->D[1] | (tlb->C[1] << 3) |
583 void op_dump_ldst (const unsigned char *func)
586 fprintf(logfile, "%s => %08x %08x\n", __func__, T0, T1);
592 fprintf(logfile, "%s %08x at %08x (%08x)\n", __func__,
593 T1, T0, env->CP0_LLAddr);
597 void debug_eret (void)
600 fprintf(logfile, "ERET: pc %08x EPC %08x ErrorEPC %08x (%d)\n",
601 env->PC, env->CP0_EPC, env->CP0_ErrorEPC,
602 env->hflags & MIPS_HFLAG_ERL ? 1 : 0);
606 void do_pmon (int function)
610 case 2: /* TODO: char inbyte(int waitflag); */
611 if (env->gpr[4] == 0)
614 case 11: /* TODO: char inbyte (void); */
619 printf("%c", env->gpr[4] & 0xFF);
625 unsigned char *fmt = (void *)env->gpr[4];
632 #if !defined(CONFIG_USER_ONLY)
634 #define MMUSUFFIX _mmu
635 #define GETPC() (__builtin_return_address(0))
638 #include "softmmu_template.h"
641 #include "softmmu_template.h"
644 #include "softmmu_template.h"
647 #include "softmmu_template.h"
649 void tlb_fill (target_ulong addr, int is_write, int is_user, void *retaddr)
651 TranslationBlock *tb;
656 /* XXX: hack to restore env in all cases, even if not called from
659 env = cpu_single_env;
660 ret = cpu_mips_handle_mmu_fault(env, addr, is_write, is_user, 1);
663 /* now we have a real cpu fault */
664 pc = (unsigned long)retaddr;
667 /* the PC is inside the translated code. It means that we have
668 a virtual CPU fault */
669 cpu_restore_state(tb, env, pc, NULL);
672 do_raise_exception_err(env->exception_index, env->error_code);