4 * Copyright (c) 2003-2005 Fabrice Bellard
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
33 /* Sparc MMU emulation */
37 spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED;
41 spin_lock(&global_cpu_lock);
46 spin_unlock(&global_cpu_lock);
49 #if defined(CONFIG_USER_ONLY)
51 int cpu_sparc_handle_mmu_fault(CPUState *env, target_ulong address, int rw,
52 int is_user, int is_softmmu)
55 env->exception_index = TT_TFAULT;
57 env->exception_index = TT_DFAULT;
63 #ifndef TARGET_SPARC64
65 * Sparc V8 Reference MMU (SRMMU)
67 static const int access_table[8][8] = {
68 { 0, 0, 0, 0, 2, 0, 3, 3 },
69 { 0, 0, 0, 0, 2, 0, 0, 0 },
70 { 2, 2, 0, 0, 0, 2, 3, 3 },
71 { 2, 2, 0, 0, 0, 2, 0, 0 },
72 { 2, 0, 2, 0, 2, 2, 3, 3 },
73 { 2, 0, 2, 0, 2, 0, 2, 0 },
74 { 2, 2, 2, 0, 2, 2, 3, 3 },
75 { 2, 2, 2, 0, 2, 2, 2, 0 }
78 static const int perm_table[2][8] = {
81 PAGE_READ | PAGE_WRITE,
82 PAGE_READ | PAGE_EXEC,
83 PAGE_READ | PAGE_WRITE | PAGE_EXEC,
85 PAGE_READ | PAGE_WRITE,
86 PAGE_READ | PAGE_EXEC,
87 PAGE_READ | PAGE_WRITE | PAGE_EXEC
91 PAGE_READ | PAGE_WRITE,
92 PAGE_READ | PAGE_EXEC,
93 PAGE_READ | PAGE_WRITE | PAGE_EXEC,
101 int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot,
102 int *access_index, target_ulong address, int rw,
105 int access_perms = 0;
106 target_phys_addr_t pde_ptr;
108 target_ulong virt_addr;
109 int error_code = 0, is_dirty;
110 unsigned long page_offset;
112 virt_addr = address & TARGET_PAGE_MASK;
114 if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */
115 // Boot mode: instruction fetches are taken from PROM
116 if (rw == 2 && (env->mmuregs[0] & MMU_BM)) {
117 *physical = 0xff0000000ULL | (address & 0x3ffffULL);
118 *prot = PAGE_READ | PAGE_EXEC;
122 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
126 *access_index = ((rw & 1) << 2) | (rw & 2) | (is_user? 0 : 1);
127 *physical = 0xffffffffffff0000ULL;
129 /* SPARC reference MMU table walk: Context table->L1->L2->PTE */
130 /* Context base + context number */
131 pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2);
132 pde = ldl_phys(pde_ptr);
135 switch (pde & PTE_ENTRYTYPE_MASK) {
137 case 0: /* Invalid */
139 case 2: /* L0 PTE, maybe should not happen? */
140 case 3: /* Reserved */
143 pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4);
144 pde = ldl_phys(pde_ptr);
146 switch (pde & PTE_ENTRYTYPE_MASK) {
148 case 0: /* Invalid */
149 return (1 << 8) | (1 << 2);
150 case 3: /* Reserved */
151 return (1 << 8) | (4 << 2);
153 pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4);
154 pde = ldl_phys(pde_ptr);
156 switch (pde & PTE_ENTRYTYPE_MASK) {
158 case 0: /* Invalid */
159 return (2 << 8) | (1 << 2);
160 case 3: /* Reserved */
161 return (2 << 8) | (4 << 2);
163 pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4);
164 pde = ldl_phys(pde_ptr);
166 switch (pde & PTE_ENTRYTYPE_MASK) {
168 case 0: /* Invalid */
169 return (3 << 8) | (1 << 2);
170 case 1: /* PDE, should not happen */
171 case 3: /* Reserved */
172 return (3 << 8) | (4 << 2);
174 virt_addr = address & TARGET_PAGE_MASK;
175 page_offset = (address & TARGET_PAGE_MASK) & (TARGET_PAGE_SIZE - 1);
179 virt_addr = address & ~0x3ffff;
180 page_offset = address & 0x3ffff;
184 virt_addr = address & ~0xffffff;
185 page_offset = address & 0xffffff;
189 /* update page modified and dirty bits */
190 is_dirty = (rw & 1) && !(pde & PG_MODIFIED_MASK);
191 if (!(pde & PG_ACCESSED_MASK) || is_dirty) {
192 pde |= PG_ACCESSED_MASK;
194 pde |= PG_MODIFIED_MASK;
195 stl_phys_notdirty(pde_ptr, pde);
198 access_perms = (pde & PTE_ACCESS_MASK) >> PTE_ACCESS_SHIFT;
199 error_code = access_table[*access_index][access_perms];
200 if (error_code && !((env->mmuregs[0] & MMU_NF) && is_user))
203 /* the page can be put in the TLB */
204 *prot = perm_table[is_user][access_perms];
205 if (!(pde & PG_MODIFIED_MASK)) {
206 /* only set write access if already dirty... otherwise wait
208 *prot &= ~PAGE_WRITE;
211 /* Even if large ptes, we map only one 4KB page in the cache to
212 avoid filling it too fast */
213 *physical = ((target_phys_addr_t)(pde & PTE_ADDR_MASK) << 4) + page_offset;
217 /* Perform address translation */
218 int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
219 int is_user, int is_softmmu)
221 target_phys_addr_t paddr;
223 int error_code = 0, prot, ret = 0, access_index;
225 error_code = get_physical_address(env, &paddr, &prot, &access_index, address, rw, is_user);
226 if (error_code == 0) {
227 vaddr = address & TARGET_PAGE_MASK;
228 paddr &= TARGET_PAGE_MASK;
230 printf("Translate at " TARGET_FMT_lx " -> " TARGET_FMT_plx ", vaddr "
231 TARGET_FMT_lx "\n", address, paddr, vaddr);
233 ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
237 if (env->mmuregs[3]) /* Fault status register */
238 env->mmuregs[3] = 1; /* overflow (not read before another fault) */
239 env->mmuregs[3] |= (access_index << 5) | error_code | 2;
240 env->mmuregs[4] = address; /* Fault address register */
242 if ((env->mmuregs[0] & MMU_NF) || env->psret == 0) {
243 // No fault mode: if a mapping is available, just override
244 // permissions. If no mapping is available, redirect accesses to
245 // neverland. Fake/overridden mappings will be flushed when
246 // switching to normal mode.
247 vaddr = address & TARGET_PAGE_MASK;
248 prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
249 ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
253 env->exception_index = TT_TFAULT;
255 env->exception_index = TT_DFAULT;
260 target_ulong mmu_probe(CPUState *env, target_ulong address, int mmulev)
262 target_phys_addr_t pde_ptr;
265 /* Context base + context number */
266 pde_ptr = (target_phys_addr_t)(env->mmuregs[1] << 4) +
267 (env->mmuregs[2] << 2);
268 pde = ldl_phys(pde_ptr);
270 switch (pde & PTE_ENTRYTYPE_MASK) {
272 case 0: /* Invalid */
273 case 2: /* PTE, maybe should not happen? */
274 case 3: /* Reserved */
279 pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4);
280 pde = ldl_phys(pde_ptr);
282 switch (pde & PTE_ENTRYTYPE_MASK) {
284 case 0: /* Invalid */
285 case 3: /* Reserved */
292 pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4);
293 pde = ldl_phys(pde_ptr);
295 switch (pde & PTE_ENTRYTYPE_MASK) {
297 case 0: /* Invalid */
298 case 3: /* Reserved */
305 pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4);
306 pde = ldl_phys(pde_ptr);
308 switch (pde & PTE_ENTRYTYPE_MASK) {
310 case 0: /* Invalid */
311 case 1: /* PDE, should not happen */
312 case 3: /* Reserved */
324 void dump_mmu(CPUState *env)
326 target_ulong va, va1, va2;
327 unsigned int n, m, o;
328 target_phys_addr_t pde_ptr, pa;
331 printf("MMU dump:\n");
332 pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2);
333 pde = ldl_phys(pde_ptr);
334 printf("Root ptr: " TARGET_FMT_plx ", ctx: %d\n",
335 (target_phys_addr_t)env->mmuregs[1] << 4, env->mmuregs[2]);
336 for (n = 0, va = 0; n < 256; n++, va += 16 * 1024 * 1024) {
337 pde = mmu_probe(env, va, 2);
339 pa = cpu_get_phys_page_debug(env, va);
340 printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_plx
341 " PDE: " TARGET_FMT_lx "\n", va, pa, pde);
342 for (m = 0, va1 = va; m < 64; m++, va1 += 256 * 1024) {
343 pde = mmu_probe(env, va1, 1);
345 pa = cpu_get_phys_page_debug(env, va1);
346 printf(" VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_plx
347 " PDE: " TARGET_FMT_lx "\n", va1, pa, pde);
348 for (o = 0, va2 = va1; o < 64; o++, va2 += 4 * 1024) {
349 pde = mmu_probe(env, va2, 0);
351 pa = cpu_get_phys_page_debug(env, va2);
352 printf(" VA: " TARGET_FMT_lx ", PA: "
353 TARGET_FMT_plx " PTE: " TARGET_FMT_lx "\n",
361 printf("MMU dump ends\n");
363 #endif /* DEBUG_MMU */
365 #else /* !TARGET_SPARC64 */
367 * UltraSparc IIi I/DMMUs
369 static int get_physical_address_data(CPUState *env, target_phys_addr_t *physical, int *prot,
370 int *access_index, target_ulong address, int rw,
376 if ((env->lsu & DMMU_E) == 0) { /* DMMU disabled */
378 *prot = PAGE_READ | PAGE_WRITE;
382 for (i = 0; i < 64; i++) {
383 switch ((env->dtlb_tte[i] >> 61) & 3) {
386 mask = 0xffffffffffffe000ULL;
389 mask = 0xffffffffffff0000ULL;
392 mask = 0xfffffffffff80000ULL;
395 mask = 0xffffffffffc00000ULL;
398 // ctx match, vaddr match?
399 if (env->dmmuregs[1] == (env->dtlb_tag[i] & 0x1fff) &&
400 (address & mask) == (env->dtlb_tag[i] & ~0x1fffULL)) {
402 if ((env->dtlb_tte[i] & 0x8000000000000000ULL) == 0 ||
403 ((env->dtlb_tte[i] & 0x4) && is_user) ||
404 (!(env->dtlb_tte[i] & 0x2) && (rw == 1))) {
405 if (env->dmmuregs[3]) /* Fault status register */
406 env->dmmuregs[3] = 2; /* overflow (not read before another fault) */
407 env->dmmuregs[3] |= (is_user << 3) | ((rw == 1) << 2) | 1;
408 env->dmmuregs[4] = address; /* Fault address register */
409 env->exception_index = TT_DFAULT;
411 printf("DFAULT at 0x%" PRIx64 "\n", address);
415 *physical = (env->dtlb_tte[i] & mask & 0x1fffffff000ULL) + (address & ~mask & 0x1fffffff000ULL);
417 if (env->dtlb_tte[i] & 0x2)
423 printf("DMISS at 0x%" PRIx64 "\n", address);
425 env->exception_index = TT_DMISS;
429 static int get_physical_address_code(CPUState *env, target_phys_addr_t *physical, int *prot,
430 int *access_index, target_ulong address, int rw,
436 if ((env->lsu & IMMU_E) == 0) { /* IMMU disabled */
442 for (i = 0; i < 64; i++) {
443 switch ((env->itlb_tte[i] >> 61) & 3) {
446 mask = 0xffffffffffffe000ULL;
449 mask = 0xffffffffffff0000ULL;
452 mask = 0xfffffffffff80000ULL;
455 mask = 0xffffffffffc00000ULL;
458 // ctx match, vaddr match?
459 if (env->dmmuregs[1] == (env->itlb_tag[i] & 0x1fff) &&
460 (address & mask) == (env->itlb_tag[i] & ~0x1fffULL)) {
462 if ((env->itlb_tte[i] & 0x8000000000000000ULL) == 0 ||
463 ((env->itlb_tte[i] & 0x4) && is_user)) {
464 if (env->immuregs[3]) /* Fault status register */
465 env->immuregs[3] = 2; /* overflow (not read before another fault) */
466 env->immuregs[3] |= (is_user << 3) | 1;
467 env->exception_index = TT_TFAULT;
469 printf("TFAULT at 0x%" PRIx64 "\n", address);
473 *physical = (env->itlb_tte[i] & mask & 0x1fffffff000ULL) + (address & ~mask & 0x1fffffff000ULL);
479 printf("TMISS at 0x%" PRIx64 "\n", address);
481 env->exception_index = TT_TMISS;
485 int get_physical_address(CPUState *env, target_phys_addr_t *physical, int *prot,
486 int *access_index, target_ulong address, int rw,
490 return get_physical_address_code(env, physical, prot, access_index, address, rw, is_user);
492 return get_physical_address_data(env, physical, prot, access_index, address, rw, is_user);
495 /* Perform address translation */
496 int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
497 int is_user, int is_softmmu)
499 target_ulong virt_addr, vaddr;
500 target_phys_addr_t paddr;
501 int error_code = 0, prot, ret = 0, access_index;
503 error_code = get_physical_address(env, &paddr, &prot, &access_index, address, rw, is_user);
504 if (error_code == 0) {
505 virt_addr = address & TARGET_PAGE_MASK;
506 vaddr = virt_addr + ((address & TARGET_PAGE_MASK) & (TARGET_PAGE_SIZE - 1));
508 printf("Translate at 0x%" PRIx64 " -> 0x%" PRIx64 ", vaddr 0x%" PRIx64 "\n", address, paddr, vaddr);
510 ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
518 void dump_mmu(CPUState *env)
523 printf("MMU contexts: Primary: %" PRId64 ", Secondary: %" PRId64 "\n", env->dmmuregs[1], env->dmmuregs[2]);
524 if ((env->lsu & DMMU_E) == 0) {
525 printf("DMMU disabled\n");
527 printf("DMMU dump:\n");
528 for (i = 0; i < 64; i++) {
529 switch ((env->dtlb_tte[i] >> 61) & 3) {
544 if ((env->dtlb_tte[i] & 0x8000000000000000ULL) != 0) {
545 printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx ", %s, %s, %s, %s, ctx %" PRId64 "\n",
546 env->dtlb_tag[i] & ~0x1fffULL,
547 env->dtlb_tte[i] & 0x1ffffffe000ULL,
549 env->dtlb_tte[i] & 0x4? "priv": "user",
550 env->dtlb_tte[i] & 0x2? "RW": "RO",
551 env->dtlb_tte[i] & 0x40? "locked": "unlocked",
552 env->dtlb_tag[i] & 0x1fffULL);
556 if ((env->lsu & IMMU_E) == 0) {
557 printf("IMMU disabled\n");
559 printf("IMMU dump:\n");
560 for (i = 0; i < 64; i++) {
561 switch ((env->itlb_tte[i] >> 61) & 3) {
576 if ((env->itlb_tte[i] & 0x8000000000000000ULL) != 0) {
577 printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx ", %s, %s, %s, ctx %" PRId64 "\n",
578 env->itlb_tag[i] & ~0x1fffULL,
579 env->itlb_tte[i] & 0x1ffffffe000ULL,
581 env->itlb_tte[i] & 0x4? "priv": "user",
582 env->itlb_tte[i] & 0x40? "locked": "unlocked",
583 env->itlb_tag[i] & 0x1fffULL);
588 #endif /* DEBUG_MMU */
590 #endif /* TARGET_SPARC64 */
591 #endif /* !CONFIG_USER_ONLY */
593 void memcpy32(target_ulong *dst, const target_ulong *src)