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1.1 root 1: /*
2: * MIPS emulation helpers for qemu.
1.1.1.6 root 3: *
1.1 root 4: * Copyright (c) 2004-2005 Jocelyn Mayer
5: *
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.
10: *
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.
15: *
16: * You should have received a copy of the GNU Lesser General Public
1.1.1.8 root 17: * License along with this library; if not, see <http://www.gnu.org/licenses/>.
1.1 root 18: */
19: #include <stdarg.h>
20: #include <stdlib.h>
21: #include <stdio.h>
22: #include <string.h>
23: #include <inttypes.h>
24: #include <signal.h>
25:
26: #include "cpu.h"
27: #include "exec-all.h"
28:
1.1.1.4 root 29: enum {
30: TLBRET_DIRTY = -4,
31: TLBRET_INVALID = -3,
32: TLBRET_NOMATCH = -2,
33: TLBRET_BADADDR = -1,
34: TLBRET_MATCH = 0
35: };
36:
1.1.1.6 root 37: /* no MMU emulation */
1.1.1.9 ! root 38: int no_mmu_map_address (CPUState *env, target_phys_addr_t *physical, int *prot,
1.1 root 39: target_ulong address, int rw, int access_type)
40: {
1.1.1.6 root 41: *physical = address;
42: *prot = PAGE_READ | PAGE_WRITE;
43: return TLBRET_MATCH;
44: }
45:
46: /* fixed mapping MMU emulation */
1.1.1.9 ! root 47: int fixed_mmu_map_address (CPUState *env, target_phys_addr_t *physical, int *prot,
1.1.1.6 root 48: target_ulong address, int rw, int access_type)
49: {
50: if (address <= (int32_t)0x7FFFFFFFUL) {
51: if (!(env->CP0_Status & (1 << CP0St_ERL)))
52: *physical = address + 0x40000000UL;
53: else
54: *physical = address;
55: } else if (address <= (int32_t)0xBFFFFFFFUL)
56: *physical = address & 0x1FFFFFFF;
57: else
58: *physical = address;
59:
60: *prot = PAGE_READ | PAGE_WRITE;
61: return TLBRET_MATCH;
62: }
63:
64: /* MIPS32/MIPS64 R4000-style MMU emulation */
1.1.1.9 ! root 65: int r4k_map_address (CPUState *env, target_phys_addr_t *physical, int *prot,
1.1.1.6 root 66: target_ulong address, int rw, int access_type)
67: {
68: uint8_t ASID = env->CP0_EntryHi & 0xFF;
1.1.1.5 root 69: int i;
70:
1.1.1.6 root 71: for (i = 0; i < env->tlb->tlb_in_use; i++) {
72: r4k_tlb_t *tlb = &env->tlb->mmu.r4k.tlb[i];
1.1.1.5 root 73: /* 1k pages are not supported. */
1.1.1.6 root 74: target_ulong mask = tlb->PageMask | ~(TARGET_PAGE_MASK << 1);
1.1.1.5 root 75: target_ulong tag = address & ~mask;
1.1.1.6 root 76: target_ulong VPN = tlb->VPN & ~mask;
77: #if defined(TARGET_MIPS64)
78: tag &= env->SEGMask;
79: #endif
1.1 root 80:
81: /* Check ASID, virtual page number & size */
1.1.1.6 root 82: if ((tlb->G == 1 || tlb->ASID == ASID) && VPN == tag) {
1.1 root 83: /* TLB match */
1.1.1.6 root 84: int n = !!(address & mask & ~(mask >> 1));
1.1 root 85: /* Check access rights */
1.1.1.6 root 86: if (!(n ? tlb->V1 : tlb->V0))
1.1.1.4 root 87: return TLBRET_INVALID;
1.1.1.6 root 88: if (rw == 0 || (n ? tlb->D1 : tlb->D0)) {
1.1.1.5 root 89: *physical = tlb->PFN[n] | (address & (mask >> 1));
1.1 root 90: *prot = PAGE_READ;
1.1.1.3 root 91: if (n ? tlb->D1 : tlb->D0)
1.1 root 92: *prot |= PAGE_WRITE;
1.1.1.4 root 93: return TLBRET_MATCH;
1.1 root 94: }
1.1.1.4 root 95: return TLBRET_DIRTY;
1.1 root 96: }
97: }
1.1.1.4 root 98: return TLBRET_NOMATCH;
1.1 root 99: }
100:
1.1.1.7 root 101: #if !defined(CONFIG_USER_ONLY)
1.1.1.9 ! root 102: static int get_physical_address (CPUState *env, target_phys_addr_t *physical,
1.1.1.4 root 103: int *prot, target_ulong address,
104: int rw, int access_type)
1.1 root 105: {
1.1.1.6 root 106: /* User mode can only access useg/xuseg */
1.1.1.4 root 107: int user_mode = (env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM;
1.1.1.6 root 108: int supervisor_mode = (env->hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_SM;
109: int kernel_mode = !user_mode && !supervisor_mode;
110: #if defined(TARGET_MIPS64)
111: int UX = (env->CP0_Status & (1 << CP0St_UX)) != 0;
112: int SX = (env->CP0_Status & (1 << CP0St_SX)) != 0;
113: int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0;
114: #endif
1.1.1.4 root 115: int ret = TLBRET_MATCH;
116:
1.1 root 117: #if 0
1.1.1.7 root 118: qemu_log("user mode %d h %08x\n", user_mode, env->hflags);
1.1 root 119: #endif
1.1.1.6 root 120:
121: if (address <= (int32_t)0x7FFFFFFFUL) {
122: /* useg */
123: if (env->CP0_Status & (1 << CP0St_ERL)) {
124: *physical = address & 0xFFFFFFFF;
1.1 root 125: *prot = PAGE_READ | PAGE_WRITE;
126: } else {
1.1.1.6 root 127: ret = env->tlb->map_address(env, physical, prot, address, rw, access_type);
1.1 root 128: }
1.1.1.6 root 129: #if defined(TARGET_MIPS64)
130: } else if (address < 0x4000000000000000ULL) {
131: /* xuseg */
1.1.1.7 root 132: if (UX && address <= (0x3FFFFFFFFFFFFFFFULL & env->SEGMask)) {
1.1.1.6 root 133: ret = env->tlb->map_address(env, physical, prot, address, rw, access_type);
1.1.1.7 root 134: } else {
135: ret = TLBRET_BADADDR;
1.1.1.6 root 136: }
137: } else if (address < 0x8000000000000000ULL) {
138: /* xsseg */
1.1.1.7 root 139: if ((supervisor_mode || kernel_mode) &&
140: SX && address <= (0x7FFFFFFFFFFFFFFFULL & env->SEGMask)) {
1.1.1.6 root 141: ret = env->tlb->map_address(env, physical, prot, address, rw, access_type);
1.1.1.7 root 142: } else {
143: ret = TLBRET_BADADDR;
1.1.1.6 root 144: }
145: } else if (address < 0xC000000000000000ULL) {
146: /* xkphys */
147: if (kernel_mode && KX &&
148: (address & 0x07FFFFFFFFFFFFFFULL) <= env->PAMask) {
149: *physical = address & env->PAMask;
150: *prot = PAGE_READ | PAGE_WRITE;
1.1.1.7 root 151: } else {
152: ret = TLBRET_BADADDR;
153: }
1.1.1.6 root 154: } else if (address < 0xFFFFFFFF80000000ULL) {
155: /* xkseg */
1.1.1.7 root 156: if (kernel_mode && KX &&
157: address <= (0xFFFFFFFF7FFFFFFFULL & env->SEGMask)) {
1.1.1.6 root 158: ret = env->tlb->map_address(env, physical, prot, address, rw, access_type);
1.1.1.7 root 159: } else {
160: ret = TLBRET_BADADDR;
161: }
1.1.1.6 root 162: #endif
1.1.1.5 root 163: } else if (address < (int32_t)0xA0000000UL) {
1.1 root 164: /* kseg0 */
1.1.1.6 root 165: if (kernel_mode) {
166: *physical = address - (int32_t)0x80000000UL;
167: *prot = PAGE_READ | PAGE_WRITE;
168: } else {
169: ret = TLBRET_BADADDR;
170: }
1.1.1.5 root 171: } else if (address < (int32_t)0xC0000000UL) {
1.1 root 172: /* kseg1 */
1.1.1.6 root 173: if (kernel_mode) {
174: *physical = address - (int32_t)0xA0000000UL;
175: *prot = PAGE_READ | PAGE_WRITE;
176: } else {
177: ret = TLBRET_BADADDR;
178: }
1.1.1.5 root 179: } else if (address < (int32_t)0xE0000000UL) {
1.1.1.6 root 180: /* sseg (kseg2) */
181: if (supervisor_mode || kernel_mode) {
182: ret = env->tlb->map_address(env, physical, prot, address, rw, access_type);
183: } else {
184: ret = TLBRET_BADADDR;
185: }
1.1 root 186: } else {
187: /* kseg3 */
188: /* XXX: debug segment is not emulated */
1.1.1.6 root 189: if (kernel_mode) {
190: ret = env->tlb->map_address(env, physical, prot, address, rw, access_type);
191: } else {
192: ret = TLBRET_BADADDR;
193: }
1.1 root 194: }
195: #if 0
1.1.1.7 root 196: qemu_log(TARGET_FMT_lx " %d %d => " TARGET_FMT_lx " %d (%d)\n",
197: address, rw, access_type, *physical, *prot, ret);
1.1 root 198: #endif
199:
200: return ret;
201: }
1.1.1.7 root 202: #endif
1.1 root 203:
1.1.1.9 ! root 204: static void raise_mmu_exception(CPUState *env, target_ulong address,
! 205: int rw, int tlb_error)
! 206: {
! 207: int exception = 0, error_code = 0;
! 208:
! 209: switch (tlb_error) {
! 210: default:
! 211: case TLBRET_BADADDR:
! 212: /* Reference to kernel address from user mode or supervisor mode */
! 213: /* Reference to supervisor address from user mode */
! 214: if (rw)
! 215: exception = EXCP_AdES;
! 216: else
! 217: exception = EXCP_AdEL;
! 218: break;
! 219: case TLBRET_NOMATCH:
! 220: /* No TLB match for a mapped address */
! 221: if (rw)
! 222: exception = EXCP_TLBS;
! 223: else
! 224: exception = EXCP_TLBL;
! 225: error_code = 1;
! 226: break;
! 227: case TLBRET_INVALID:
! 228: /* TLB match with no valid bit */
! 229: if (rw)
! 230: exception = EXCP_TLBS;
! 231: else
! 232: exception = EXCP_TLBL;
! 233: break;
! 234: case TLBRET_DIRTY:
! 235: /* TLB match but 'D' bit is cleared */
! 236: exception = EXCP_LTLBL;
! 237: break;
! 238:
! 239: }
! 240: /* Raise exception */
! 241: env->CP0_BadVAddr = address;
! 242: env->CP0_Context = (env->CP0_Context & ~0x007fffff) |
! 243: ((address >> 9) & 0x007ffff0);
! 244: env->CP0_EntryHi =
! 245: (env->CP0_EntryHi & 0xFF) | (address & (TARGET_PAGE_MASK << 1));
! 246: #if defined(TARGET_MIPS64)
! 247: env->CP0_EntryHi &= env->SEGMask;
! 248: env->CP0_XContext = (env->CP0_XContext & ((~0ULL) << (env->SEGBITS - 7))) |
! 249: ((address & 0xC00000000000ULL) >> (55 - env->SEGBITS)) |
! 250: ((address & ((1ULL << env->SEGBITS) - 1) & 0xFFFFFFFFFFFFE000ULL) >> 9);
! 251: #endif
! 252: env->exception_index = exception;
! 253: env->error_code = error_code;
! 254: }
! 255:
1.1.1.6 root 256: target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
1.1 root 257: {
1.1.1.7 root 258: #if defined(CONFIG_USER_ONLY)
1.1 root 259: return addr;
260: #else
1.1.1.9 ! root 261: target_phys_addr_t phys_addr;
1.1 root 262: int prot;
263:
264: if (get_physical_address(env, &phys_addr, &prot, addr, 0, ACCESS_INT) != 0)
265: return -1;
266: return phys_addr;
1.1.1.7 root 267: #endif
1.1 root 268: }
269:
270: int cpu_mips_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
1.1.1.6 root 271: int mmu_idx, int is_softmmu)
1.1 root 272: {
1.1.1.7 root 273: #if !defined(CONFIG_USER_ONLY)
1.1.1.9 ! root 274: target_phys_addr_t physical;
1.1 root 275: int prot;
1.1.1.7 root 276: #endif
1.1 root 277: int access_type;
278: int ret = 0;
279:
1.1.1.2 root 280: #if 0
1.1.1.7 root 281: log_cpu_state(env, 0);
1.1.1.2 root 282: #endif
1.1.1.7 root 283: qemu_log("%s pc " TARGET_FMT_lx " ad " TARGET_FMT_lx " rw %d mmu_idx %d smmu %d\n",
284: __func__, env->active_tc.PC, address, rw, mmu_idx, is_softmmu);
1.1.1.2 root 285:
286: rw &= 1;
287:
1.1 root 288: /* data access */
289: /* XXX: put correct access by using cpu_restore_state()
290: correctly */
291: access_type = ACCESS_INT;
1.1.1.7 root 292: #if defined(CONFIG_USER_ONLY)
293: ret = TLBRET_NOMATCH;
294: #else
1.1 root 295: ret = get_physical_address(env, &physical, &prot,
296: address, rw, access_type);
1.1.1.9 ! root 297: qemu_log("%s address=" TARGET_FMT_lx " ret %d physical " TARGET_FMT_plx " prot %d\n",
1.1.1.7 root 298: __func__, address, ret, physical, prot);
1.1.1.4 root 299: if (ret == TLBRET_MATCH) {
300: ret = tlb_set_page(env, address & TARGET_PAGE_MASK,
301: physical & TARGET_PAGE_MASK, prot,
1.1.1.6 root 302: mmu_idx, is_softmmu);
1.1.1.7 root 303: } else if (ret < 0)
304: #endif
305: {
1.1.1.9 ! root 306: raise_mmu_exception(env, address, rw, ret);
1.1 root 307: ret = 1;
308: }
309:
310: return ret;
311: }
312:
1.1.1.9 ! root 313: #if !defined(CONFIG_USER_ONLY)
! 314: target_phys_addr_t do_translate_address(CPUState *env, target_ulong address, int rw)
! 315: {
! 316: target_phys_addr_t physical;
! 317: int prot;
! 318: int access_type;
! 319: int ret = 0;
! 320:
! 321: rw &= 1;
! 322:
! 323: /* data access */
! 324: access_type = ACCESS_INT;
! 325: ret = get_physical_address(env, &physical, &prot,
! 326: address, rw, access_type);
! 327: if (ret != TLBRET_MATCH) {
! 328: raise_mmu_exception(env, address, rw, ret);
! 329: cpu_loop_exit();
! 330: }
! 331:
! 332: return physical;
! 333: }
! 334: #endif
! 335:
1.1.1.6 root 336: static const char * const excp_names[EXCP_LAST + 1] = {
337: [EXCP_RESET] = "reset",
338: [EXCP_SRESET] = "soft reset",
339: [EXCP_DSS] = "debug single step",
340: [EXCP_DINT] = "debug interrupt",
341: [EXCP_NMI] = "non-maskable interrupt",
342: [EXCP_MCHECK] = "machine check",
343: [EXCP_EXT_INTERRUPT] = "interrupt",
344: [EXCP_DFWATCH] = "deferred watchpoint",
345: [EXCP_DIB] = "debug instruction breakpoint",
346: [EXCP_IWATCH] = "instruction fetch watchpoint",
347: [EXCP_AdEL] = "address error load",
348: [EXCP_AdES] = "address error store",
349: [EXCP_TLBF] = "TLB refill",
350: [EXCP_IBE] = "instruction bus error",
351: [EXCP_DBp] = "debug breakpoint",
352: [EXCP_SYSCALL] = "syscall",
353: [EXCP_BREAK] = "break",
354: [EXCP_CpU] = "coprocessor unusable",
355: [EXCP_RI] = "reserved instruction",
356: [EXCP_OVERFLOW] = "arithmetic overflow",
357: [EXCP_TRAP] = "trap",
358: [EXCP_FPE] = "floating point",
359: [EXCP_DDBS] = "debug data break store",
360: [EXCP_DWATCH] = "data watchpoint",
361: [EXCP_LTLBL] = "TLB modify",
362: [EXCP_TLBL] = "TLB load",
363: [EXCP_TLBS] = "TLB store",
364: [EXCP_DBE] = "data bus error",
365: [EXCP_DDBL] = "debug data break load",
366: [EXCP_THREAD] = "thread",
367: [EXCP_MDMX] = "MDMX",
368: [EXCP_C2E] = "precise coprocessor 2",
369: [EXCP_CACHE] = "cache error",
370: };
371:
1.1 root 372: void do_interrupt (CPUState *env)
373: {
1.1.1.6 root 374: #if !defined(CONFIG_USER_ONLY)
1.1.1.5 root 375: target_ulong offset;
1.1 root 376: int cause = -1;
1.1.1.6 root 377: const char *name;
1.1 root 378:
1.1.1.7 root 379: if (qemu_log_enabled() && env->exception_index != EXCP_EXT_INTERRUPT) {
1.1.1.6 root 380: if (env->exception_index < 0 || env->exception_index > EXCP_LAST)
381: name = "unknown";
382: else
383: name = excp_names[env->exception_index];
384:
1.1.1.7 root 385: qemu_log("%s enter: PC " TARGET_FMT_lx " EPC " TARGET_FMT_lx " %s exception\n",
386: __func__, env->active_tc.PC, env->CP0_EPC, name);
1.1 root 387: }
388: if (env->exception_index == EXCP_EXT_INTERRUPT &&
389: (env->hflags & MIPS_HFLAG_DM))
390: env->exception_index = EXCP_DINT;
391: offset = 0x180;
392: switch (env->exception_index) {
393: case EXCP_DSS:
394: env->CP0_Debug |= 1 << CP0DB_DSS;
395: /* Debug single step cannot be raised inside a delay slot and
1.1.1.7 root 396: resume will always occur on the next instruction
397: (but we assume the pc has always been updated during
398: code translation). */
399: env->CP0_DEPC = env->active_tc.PC;
1.1 root 400: goto enter_debug_mode;
401: case EXCP_DINT:
402: env->CP0_Debug |= 1 << CP0DB_DINT;
403: goto set_DEPC;
404: case EXCP_DIB:
405: env->CP0_Debug |= 1 << CP0DB_DIB;
406: goto set_DEPC;
407: case EXCP_DBp:
408: env->CP0_Debug |= 1 << CP0DB_DBp;
409: goto set_DEPC;
410: case EXCP_DDBS:
411: env->CP0_Debug |= 1 << CP0DB_DDBS;
412: goto set_DEPC;
413: case EXCP_DDBL:
414: env->CP0_Debug |= 1 << CP0DB_DDBL;
415: set_DEPC:
1.1.1.2 root 416: if (env->hflags & MIPS_HFLAG_BMASK) {
1.1 root 417: /* If the exception was raised from a delay slot,
1.1.1.5 root 418: come back to the jump. */
1.1.1.7 root 419: env->CP0_DEPC = env->active_tc.PC - 4;
1.1.1.2 root 420: env->hflags &= ~MIPS_HFLAG_BMASK;
1.1 root 421: } else {
1.1.1.7 root 422: env->CP0_DEPC = env->active_tc.PC;
1.1 root 423: }
1.1.1.7 root 424: enter_debug_mode:
1.1.1.6 root 425: env->hflags |= MIPS_HFLAG_DM | MIPS_HFLAG_64 | MIPS_HFLAG_CP0;
426: env->hflags &= ~(MIPS_HFLAG_KSU);
1.1 root 427: /* EJTAG probe trap enable is not implemented... */
1.1.1.6 root 428: if (!(env->CP0_Status & (1 << CP0St_EXL)))
429: env->CP0_Cause &= ~(1 << CP0Ca_BD);
1.1.1.7 root 430: env->active_tc.PC = (int32_t)0xBFC00480;
1.1 root 431: break;
432: case EXCP_RESET:
1.1.1.5 root 433: cpu_reset(env);
434: break;
1.1 root 435: case EXCP_SRESET:
1.1.1.6 root 436: env->CP0_Status |= (1 << CP0St_SR);
437: memset(env->CP0_WatchLo, 0, sizeof(*env->CP0_WatchLo));
1.1 root 438: goto set_error_EPC;
439: case EXCP_NMI:
1.1.1.6 root 440: env->CP0_Status |= (1 << CP0St_NMI);
1.1.1.7 root 441: set_error_EPC:
1.1.1.2 root 442: if (env->hflags & MIPS_HFLAG_BMASK) {
1.1 root 443: /* If the exception was raised from a delay slot,
1.1.1.5 root 444: come back to the jump. */
1.1.1.7 root 445: env->CP0_ErrorEPC = env->active_tc.PC - 4;
1.1.1.3 root 446: env->hflags &= ~MIPS_HFLAG_BMASK;
1.1 root 447: } else {
1.1.1.7 root 448: env->CP0_ErrorEPC = env->active_tc.PC;
1.1 root 449: }
1.1.1.6 root 450: env->CP0_Status |= (1 << CP0St_ERL) | (1 << CP0St_BEV);
451: env->hflags |= MIPS_HFLAG_64 | MIPS_HFLAG_CP0;
452: env->hflags &= ~(MIPS_HFLAG_KSU);
453: if (!(env->CP0_Status & (1 << CP0St_EXL)))
454: env->CP0_Cause &= ~(1 << CP0Ca_BD);
1.1.1.7 root 455: env->active_tc.PC = (int32_t)0xBFC00000;
1.1 root 456: break;
457: case EXCP_EXT_INTERRUPT:
458: cause = 0;
459: if (env->CP0_Cause & (1 << CP0Ca_IV))
460: offset = 0x200;
461: goto set_EPC;
1.1.1.6 root 462: case EXCP_LTLBL:
463: cause = 1;
464: goto set_EPC;
465: case EXCP_TLBL:
466: cause = 2;
467: if (env->error_code == 1 && !(env->CP0_Status & (1 << CP0St_EXL))) {
468: #if defined(TARGET_MIPS64)
469: int R = env->CP0_BadVAddr >> 62;
470: int UX = (env->CP0_Status & (1 << CP0St_UX)) != 0;
471: int SX = (env->CP0_Status & (1 << CP0St_SX)) != 0;
472: int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0;
473:
474: if ((R == 0 && UX) || (R == 1 && SX) || (R == 3 && KX))
475: offset = 0x080;
476: else
477: #endif
478: offset = 0x000;
479: }
480: goto set_EPC;
481: case EXCP_TLBS:
482: cause = 3;
483: if (env->error_code == 1 && !(env->CP0_Status & (1 << CP0St_EXL))) {
484: #if defined(TARGET_MIPS64)
485: int R = env->CP0_BadVAddr >> 62;
486: int UX = (env->CP0_Status & (1 << CP0St_UX)) != 0;
487: int SX = (env->CP0_Status & (1 << CP0St_SX)) != 0;
488: int KX = (env->CP0_Status & (1 << CP0St_KX)) != 0;
489:
490: if ((R == 0 && UX) || (R == 1 && SX) || (R == 3 && KX))
491: offset = 0x080;
492: else
493: #endif
494: offset = 0x000;
495: }
1.1 root 496: goto set_EPC;
497: case EXCP_AdEL:
498: cause = 4;
499: goto set_EPC;
1.1.1.6 root 500: case EXCP_AdES:
501: cause = 5;
1.1 root 502: goto set_EPC;
503: case EXCP_IBE:
504: cause = 6;
505: goto set_EPC;
506: case EXCP_DBE:
507: cause = 7;
508: goto set_EPC;
509: case EXCP_SYSCALL:
510: cause = 8;
511: goto set_EPC;
512: case EXCP_BREAK:
513: cause = 9;
514: goto set_EPC;
515: case EXCP_RI:
516: cause = 10;
517: goto set_EPC;
518: case EXCP_CpU:
519: cause = 11;
1.1.1.6 root 520: env->CP0_Cause = (env->CP0_Cause & ~(0x3 << CP0Ca_CE)) |
521: (env->error_code << CP0Ca_CE);
1.1 root 522: goto set_EPC;
523: case EXCP_OVERFLOW:
524: cause = 12;
525: goto set_EPC;
526: case EXCP_TRAP:
527: cause = 13;
528: goto set_EPC;
1.1.1.6 root 529: case EXCP_FPE:
530: cause = 15;
1.1 root 531: goto set_EPC;
1.1.1.6 root 532: case EXCP_C2E:
533: cause = 18;
1.1 root 534: goto set_EPC;
1.1.1.6 root 535: case EXCP_MDMX:
536: cause = 22;
537: goto set_EPC;
538: case EXCP_DWATCH:
539: cause = 23;
540: /* XXX: TODO: manage defered watch exceptions */
541: goto set_EPC;
542: case EXCP_MCHECK:
543: cause = 24;
544: goto set_EPC;
545: case EXCP_THREAD:
546: cause = 25;
547: goto set_EPC;
548: case EXCP_CACHE:
549: cause = 30;
550: if (env->CP0_Status & (1 << CP0St_BEV)) {
551: offset = 0x100;
1.1 root 552: } else {
1.1.1.6 root 553: offset = 0x20000100;
554: }
1.1.1.7 root 555: set_EPC:
1.1.1.6 root 556: if (!(env->CP0_Status & (1 << CP0St_EXL))) {
557: if (env->hflags & MIPS_HFLAG_BMASK) {
558: /* If the exception was raised from a delay slot,
559: come back to the jump. */
1.1.1.7 root 560: env->CP0_EPC = env->active_tc.PC - 4;
1.1.1.6 root 561: env->CP0_Cause |= (1 << CP0Ca_BD);
562: } else {
1.1.1.7 root 563: env->CP0_EPC = env->active_tc.PC;
1.1.1.6 root 564: env->CP0_Cause &= ~(1 << CP0Ca_BD);
565: }
566: env->CP0_Status |= (1 << CP0St_EXL);
567: env->hflags |= MIPS_HFLAG_64 | MIPS_HFLAG_CP0;
568: env->hflags &= ~(MIPS_HFLAG_KSU);
1.1 root 569: }
1.1.1.6 root 570: env->hflags &= ~MIPS_HFLAG_BMASK;
1.1.1.5 root 571: if (env->CP0_Status & (1 << CP0St_BEV)) {
1.1.1.7 root 572: env->active_tc.PC = (int32_t)0xBFC00200;
1.1.1.5 root 573: } else {
1.1.1.7 root 574: env->active_tc.PC = (int32_t)(env->CP0_EBase & ~0x3ff);
1.1.1.5 root 575: }
1.1.1.7 root 576: env->active_tc.PC += offset;
1.1.1.6 root 577: env->CP0_Cause = (env->CP0_Cause & ~(0x1f << CP0Ca_EC)) | (cause << CP0Ca_EC);
1.1 root 578: break;
579: default:
1.1.1.7 root 580: qemu_log("Invalid MIPS exception %d. Exiting\n", env->exception_index);
1.1 root 581: printf("Invalid MIPS exception %d. Exiting\n", env->exception_index);
582: exit(1);
583: }
1.1.1.7 root 584: if (qemu_log_enabled() && env->exception_index != EXCP_EXT_INTERRUPT) {
585: qemu_log("%s: PC " TARGET_FMT_lx " EPC " TARGET_FMT_lx " cause %d\n"
1.1.1.6 root 586: " S %08x C %08x A " TARGET_FMT_lx " D " TARGET_FMT_lx "\n",
1.1.1.7 root 587: __func__, env->active_tc.PC, env->CP0_EPC, cause,
1.1 root 588: env->CP0_Status, env->CP0_Cause, env->CP0_BadVAddr,
589: env->CP0_DEPC);
590: }
1.1.1.7 root 591: #endif
1.1 root 592: env->exception_index = EXCP_NONE;
593: }
1.1.1.5 root 594:
1.1.1.6 root 595: void r4k_invalidate_tlb (CPUState *env, int idx, int use_extra)
1.1.1.5 root 596: {
1.1.1.6 root 597: r4k_tlb_t *tlb;
1.1.1.5 root 598: target_ulong addr;
599: target_ulong end;
600: uint8_t ASID = env->CP0_EntryHi & 0xFF;
601: target_ulong mask;
602:
1.1.1.6 root 603: tlb = &env->tlb->mmu.r4k.tlb[idx];
604: /* The qemu TLB is flushed when the ASID changes, so no need to
1.1.1.5 root 605: flush these entries again. */
606: if (tlb->G == 0 && tlb->ASID != ASID) {
607: return;
608: }
609:
1.1.1.6 root 610: if (use_extra && env->tlb->tlb_in_use < MIPS_TLB_MAX) {
1.1.1.5 root 611: /* For tlbwr, we can shadow the discarded entry into
1.1.1.7 root 612: a new (fake) TLB entry, as long as the guest can not
613: tell that it's there. */
1.1.1.6 root 614: env->tlb->mmu.r4k.tlb[env->tlb->tlb_in_use] = *tlb;
615: env->tlb->tlb_in_use++;
1.1.1.5 root 616: return;
617: }
618:
619: /* 1k pages are not supported. */
1.1.1.6 root 620: mask = tlb->PageMask | ~(TARGET_PAGE_MASK << 1);
1.1.1.5 root 621: if (tlb->V0) {
1.1.1.6 root 622: addr = tlb->VPN & ~mask;
623: #if defined(TARGET_MIPS64)
624: if (addr >= (0xFFFFFFFF80000000ULL & env->SEGMask)) {
625: addr |= 0x3FFFFF0000000000ULL;
626: }
627: #endif
1.1.1.5 root 628: end = addr | (mask >> 1);
629: while (addr < end) {
630: tlb_flush_page (env, addr);
631: addr += TARGET_PAGE_SIZE;
632: }
633: }
634: if (tlb->V1) {
1.1.1.6 root 635: addr = (tlb->VPN & ~mask) | ((mask >> 1) + 1);
636: #if defined(TARGET_MIPS64)
637: if (addr >= (0xFFFFFFFF80000000ULL & env->SEGMask)) {
638: addr |= 0x3FFFFF0000000000ULL;
639: }
640: #endif
1.1.1.5 root 641: end = addr | mask;
1.1.1.7 root 642: while (addr - 1 < end) {
1.1.1.5 root 643: tlb_flush_page (env, addr);
644: addr += TARGET_PAGE_SIZE;
645: }
646: }
647: }
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