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, see <http://www.gnu.org/licenses/>.
22 #include "exec/address-spaces.h"
24 /* Sparc MMU emulation */
26 #if defined(CONFIG_USER_ONLY)
28 int cpu_sparc_handle_mmu_fault(CPUSPARCState *env1, target_ulong address, int rw,
32 env1->exception_index = TT_TFAULT;
34 env1->exception_index = TT_DFAULT;
41 #ifndef TARGET_SPARC64
43 * Sparc V8 Reference MMU (SRMMU)
45 static const int access_table[8][8] = {
46 { 0, 0, 0, 0, 8, 0, 12, 12 },
47 { 0, 0, 0, 0, 8, 0, 0, 0 },
48 { 8, 8, 0, 0, 0, 8, 12, 12 },
49 { 8, 8, 0, 0, 0, 8, 0, 0 },
50 { 8, 0, 8, 0, 8, 8, 12, 12 },
51 { 8, 0, 8, 0, 8, 0, 8, 0 },
52 { 8, 8, 8, 0, 8, 8, 12, 12 },
53 { 8, 8, 8, 0, 8, 8, 8, 0 }
56 static const int perm_table[2][8] = {
59 PAGE_READ | PAGE_WRITE,
60 PAGE_READ | PAGE_EXEC,
61 PAGE_READ | PAGE_WRITE | PAGE_EXEC,
63 PAGE_READ | PAGE_WRITE,
64 PAGE_READ | PAGE_EXEC,
65 PAGE_READ | PAGE_WRITE | PAGE_EXEC
69 PAGE_READ | PAGE_WRITE,
70 PAGE_READ | PAGE_EXEC,
71 PAGE_READ | PAGE_WRITE | PAGE_EXEC,
79 static int get_physical_address(CPUSPARCState *env, hwaddr *physical,
80 int *prot, int *access_index,
81 target_ulong address, int rw, int mmu_idx,
82 target_ulong *page_size)
87 int error_code = 0, is_dirty, is_user;
88 unsigned long page_offset;
90 is_user = mmu_idx == MMU_USER_IDX;
92 if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */
93 *page_size = TARGET_PAGE_SIZE;
94 /* Boot mode: instruction fetches are taken from PROM */
95 if (rw == 2 && (env->mmuregs[0] & env->def->mmu_bm)) {
96 *physical = env->prom_addr | (address & 0x7ffffULL);
97 *prot = PAGE_READ | PAGE_EXEC;
101 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
105 *access_index = ((rw & 1) << 2) | (rw & 2) | (is_user ? 0 : 1);
106 *physical = 0xffffffffffff0000ULL;
108 /* SPARC reference MMU table walk: Context table->L1->L2->PTE */
109 /* Context base + context number */
110 pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2);
111 pde = ldl_phys(pde_ptr);
114 switch (pde & PTE_ENTRYTYPE_MASK) {
116 case 0: /* Invalid */
118 case 2: /* L0 PTE, maybe should not happen? */
119 case 3: /* Reserved */
122 pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4);
123 pde = ldl_phys(pde_ptr);
125 switch (pde & PTE_ENTRYTYPE_MASK) {
127 case 0: /* Invalid */
128 return (1 << 8) | (1 << 2);
129 case 3: /* Reserved */
130 return (1 << 8) | (4 << 2);
132 pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4);
133 pde = ldl_phys(pde_ptr);
135 switch (pde & PTE_ENTRYTYPE_MASK) {
137 case 0: /* Invalid */
138 return (2 << 8) | (1 << 2);
139 case 3: /* Reserved */
140 return (2 << 8) | (4 << 2);
142 pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4);
143 pde = ldl_phys(pde_ptr);
145 switch (pde & PTE_ENTRYTYPE_MASK) {
147 case 0: /* Invalid */
148 return (3 << 8) | (1 << 2);
149 case 1: /* PDE, should not happen */
150 case 3: /* Reserved */
151 return (3 << 8) | (4 << 2);
155 *page_size = TARGET_PAGE_SIZE;
158 page_offset = address & 0x3f000;
159 *page_size = 0x40000;
163 page_offset = address & 0xfff000;
164 *page_size = 0x1000000;
169 access_perms = (pde & PTE_ACCESS_MASK) >> PTE_ACCESS_SHIFT;
170 error_code = access_table[*access_index][access_perms];
171 if (error_code && !((env->mmuregs[0] & MMU_NF) && is_user)) {
175 /* update page modified and dirty bits */
176 is_dirty = (rw & 1) && !(pde & PG_MODIFIED_MASK);
177 if (!(pde & PG_ACCESSED_MASK) || is_dirty) {
178 pde |= PG_ACCESSED_MASK;
180 pde |= PG_MODIFIED_MASK;
182 stl_phys_notdirty(pde_ptr, pde);
185 /* the page can be put in the TLB */
186 *prot = perm_table[is_user][access_perms];
187 if (!(pde & PG_MODIFIED_MASK)) {
188 /* only set write access if already dirty... otherwise wait
190 *prot &= ~PAGE_WRITE;
193 /* Even if large ptes, we map only one 4KB page in the cache to
194 avoid filling it too fast */
195 *physical = ((hwaddr)(pde & PTE_ADDR_MASK) << 4) + page_offset;
199 /* Perform address translation */
200 int cpu_sparc_handle_mmu_fault(CPUSPARCState *env, target_ulong address, int rw,
205 target_ulong page_size;
206 int error_code = 0, prot, access_index;
208 address &= TARGET_PAGE_MASK;
209 error_code = get_physical_address(env, &paddr, &prot, &access_index,
210 address, rw, mmu_idx, &page_size);
212 if (error_code == 0) {
214 printf("Translate at " TARGET_FMT_lx " -> " TARGET_FMT_plx ", vaddr "
215 TARGET_FMT_lx "\n", address, paddr, vaddr);
217 tlb_set_page(env, vaddr, paddr, prot, mmu_idx, page_size);
221 if (env->mmuregs[3]) { /* Fault status register */
222 env->mmuregs[3] = 1; /* overflow (not read before another fault) */
224 env->mmuregs[3] |= (access_index << 5) | error_code | 2;
225 env->mmuregs[4] = address; /* Fault address register */
227 if ((env->mmuregs[0] & MMU_NF) || env->psret == 0) {
228 /* No fault mode: if a mapping is available, just override
229 permissions. If no mapping is available, redirect accesses to
230 neverland. Fake/overridden mappings will be flushed when
231 switching to normal mode. */
232 prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
233 tlb_set_page(env, vaddr, paddr, prot, mmu_idx, TARGET_PAGE_SIZE);
237 env->exception_index = TT_TFAULT;
239 env->exception_index = TT_DFAULT;
245 target_ulong mmu_probe(CPUSPARCState *env, target_ulong address, int mmulev)
250 /* Context base + context number */
251 pde_ptr = (hwaddr)(env->mmuregs[1] << 4) +
252 (env->mmuregs[2] << 2);
253 pde = ldl_phys(pde_ptr);
255 switch (pde & PTE_ENTRYTYPE_MASK) {
257 case 0: /* Invalid */
258 case 2: /* PTE, maybe should not happen? */
259 case 3: /* Reserved */
265 pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4);
266 pde = ldl_phys(pde_ptr);
268 switch (pde & PTE_ENTRYTYPE_MASK) {
270 case 0: /* Invalid */
271 case 3: /* Reserved */
279 pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4);
280 pde = ldl_phys(pde_ptr);
282 switch (pde & PTE_ENTRYTYPE_MASK) {
284 case 0: /* Invalid */
285 case 3: /* Reserved */
293 pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4);
294 pde = ldl_phys(pde_ptr);
296 switch (pde & PTE_ENTRYTYPE_MASK) {
298 case 0: /* Invalid */
299 case 1: /* PDE, should not happen */
300 case 3: /* Reserved */
311 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUSPARCState *env)
313 target_ulong va, va1, va2;
314 unsigned int n, m, o;
318 pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2);
319 pde = ldl_phys(pde_ptr);
320 (*cpu_fprintf)(f, "Root ptr: " TARGET_FMT_plx ", ctx: %d\n",
321 (hwaddr)env->mmuregs[1] << 4, env->mmuregs[2]);
322 for (n = 0, va = 0; n < 256; n++, va += 16 * 1024 * 1024) {
323 pde = mmu_probe(env, va, 2);
325 pa = cpu_get_phys_page_debug(env, va);
326 (*cpu_fprintf)(f, "VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_plx
327 " PDE: " TARGET_FMT_lx "\n", va, pa, pde);
328 for (m = 0, va1 = va; m < 64; m++, va1 += 256 * 1024) {
329 pde = mmu_probe(env, va1, 1);
331 pa = cpu_get_phys_page_debug(env, va1);
332 (*cpu_fprintf)(f, " VA: " TARGET_FMT_lx ", PA: "
333 TARGET_FMT_plx " PDE: " TARGET_FMT_lx "\n",
335 for (o = 0, va2 = va1; o < 64; o++, va2 += 4 * 1024) {
336 pde = mmu_probe(env, va2, 0);
338 pa = cpu_get_phys_page_debug(env, va2);
339 (*cpu_fprintf)(f, " VA: " TARGET_FMT_lx ", PA: "
340 TARGET_FMT_plx " PTE: "
351 /* Gdb expects all registers windows to be flushed in ram. This function handles
352 * reads (and only reads) in stack frames as if windows were flushed. We assume
353 * that the sparc ABI is followed.
355 int target_memory_rw_debug(CPUSPARCState *env, target_ulong addr,
356 uint8_t *buf, int len, int is_write)
363 for (i = 0; i < env->nwindows; i++) {
365 target_ulong fp = env->regbase[cwp * 16 + 22];
367 /* Assume fp == 0 means end of frame. */
372 cwp = cpu_cwp_inc(env, cwp + 1);
374 /* Invalid window ? */
375 if (env->wim & (1 << cwp)) {
379 /* According to the ABI, the stack is growing downward. */
380 if (addr + len < fp) {
384 /* Not in this frame. */
385 if (addr > fp + 64) {
389 /* Handle access before this window. */
392 if (cpu_memory_rw_debug(env, addr, buf, len1, is_write) != 0) {
400 /* Access byte per byte to registers. Not very efficient but speed
410 for (; len1; len1--) {
411 int reg = cwp * 16 + 8 + (off >> 2);
416 u.v = cpu_to_be32(env->regbase[reg]);
417 *buf++ = u.c[off & 3];
428 return cpu_memory_rw_debug(env, addr, buf, len, is_write);
431 #else /* !TARGET_SPARC64 */
433 /* 41 bit physical address space */
434 static inline hwaddr ultrasparc_truncate_physical(uint64_t x)
436 return x & 0x1ffffffffffULL;
440 * UltraSparc IIi I/DMMUs
443 /* Returns true if TTE tag is valid and matches virtual address value
444 in context requires virtual address mask value calculated from TTE
446 static inline int ultrasparc_tag_match(SparcTLBEntry *tlb,
447 uint64_t address, uint64_t context,
452 switch (TTE_PGSIZE(tlb->tte)) {
455 mask = 0xffffffffffffe000ULL;
458 mask = 0xffffffffffff0000ULL;
461 mask = 0xfffffffffff80000ULL;
464 mask = 0xffffffffffc00000ULL;
468 /* valid, context match, virtual address match? */
469 if (TTE_IS_VALID(tlb->tte) &&
470 (TTE_IS_GLOBAL(tlb->tte) || tlb_compare_context(tlb, context))
471 && compare_masked(address, tlb->tag, mask)) {
472 /* decode physical address */
473 *physical = ((tlb->tte & mask) | (address & ~mask)) & 0x1ffffffe000ULL;
480 static int get_physical_address_data(CPUSPARCState *env,
481 hwaddr *physical, int *prot,
482 target_ulong address, int rw, int mmu_idx)
488 int is_user = (mmu_idx == MMU_USER_IDX ||
489 mmu_idx == MMU_USER_SECONDARY_IDX);
491 if ((env->lsu & DMMU_E) == 0) { /* DMMU disabled */
492 *physical = ultrasparc_truncate_physical(address);
493 *prot = PAGE_READ | PAGE_WRITE;
500 context = env->dmmu.mmu_primary_context & 0x1fff;
501 sfsr |= SFSR_CT_PRIMARY;
503 case MMU_USER_SECONDARY_IDX:
504 case MMU_KERNEL_SECONDARY_IDX:
505 context = env->dmmu.mmu_secondary_context & 0x1fff;
506 sfsr |= SFSR_CT_SECONDARY;
508 case MMU_NUCLEUS_IDX:
509 sfsr |= SFSR_CT_NUCLEUS;
517 sfsr |= SFSR_WRITE_BIT;
518 } else if (rw == 4) {
522 for (i = 0; i < 64; i++) {
523 /* ctx match, vaddr match, valid? */
524 if (ultrasparc_tag_match(&env->dtlb[i], address, context, physical)) {
528 /* multiple bits in SFSR.FT may be set on TT_DFAULT */
529 if (TTE_IS_PRIV(env->dtlb[i].tte) && is_user) {
531 sfsr |= SFSR_FT_PRIV_BIT; /* privilege violation */
532 trace_mmu_helper_dfault(address, context, mmu_idx, env->tl);
535 if (TTE_IS_SIDEEFFECT(env->dtlb[i].tte)) {
537 sfsr |= SFSR_FT_NF_E_BIT;
540 if (TTE_IS_NFO(env->dtlb[i].tte)) {
542 sfsr |= SFSR_FT_NFO_BIT;
547 /* faults above are reported with TT_DFAULT. */
548 env->exception_index = TT_DFAULT;
549 } else if (!TTE_IS_W_OK(env->dtlb[i].tte) && (rw == 1)) {
551 env->exception_index = TT_DPROT;
553 trace_mmu_helper_dprot(address, context, mmu_idx, env->tl);
558 if (TTE_IS_W_OK(env->dtlb[i].tte)) {
562 TTE_SET_USED(env->dtlb[i].tte);
567 if (env->dmmu.sfsr & SFSR_VALID_BIT) { /* Fault status register */
568 sfsr |= SFSR_OW_BIT; /* overflow (not read before
572 if (env->pstate & PS_PRIV) {
576 /* FIXME: ASI field in SFSR must be set */
577 env->dmmu.sfsr = sfsr | SFSR_VALID_BIT;
579 env->dmmu.sfar = address; /* Fault address register */
581 env->dmmu.tag_access = (address & ~0x1fffULL) | context;
587 trace_mmu_helper_dmiss(address, context);
591 * - UltraSPARC IIi: SFSR and SFAR unmodified
592 * - JPS1: SFAR updated and some fields of SFSR updated
594 env->dmmu.tag_access = (address & ~0x1fffULL) | context;
595 env->exception_index = TT_DMISS;
599 static int get_physical_address_code(CPUSPARCState *env,
600 hwaddr *physical, int *prot,
601 target_ulong address, int mmu_idx)
606 int is_user = (mmu_idx == MMU_USER_IDX ||
607 mmu_idx == MMU_USER_SECONDARY_IDX);
609 if ((env->lsu & IMMU_E) == 0 || (env->pstate & PS_RED) != 0) {
611 *physical = ultrasparc_truncate_physical(address);
617 /* PRIMARY context */
618 context = env->dmmu.mmu_primary_context & 0x1fff;
620 /* NUCLEUS context */
624 for (i = 0; i < 64; i++) {
625 /* ctx match, vaddr match, valid? */
626 if (ultrasparc_tag_match(&env->itlb[i],
627 address, context, physical)) {
629 if (TTE_IS_PRIV(env->itlb[i].tte) && is_user) {
630 /* Fault status register */
631 if (env->immu.sfsr & SFSR_VALID_BIT) {
632 env->immu.sfsr = SFSR_OW_BIT; /* overflow (not read before
637 if (env->pstate & PS_PRIV) {
638 env->immu.sfsr |= SFSR_PR_BIT;
641 env->immu.sfsr |= SFSR_CT_NUCLEUS;
644 /* FIXME: ASI field in SFSR must be set */
645 env->immu.sfsr |= SFSR_FT_PRIV_BIT | SFSR_VALID_BIT;
646 env->exception_index = TT_TFAULT;
648 env->immu.tag_access = (address & ~0x1fffULL) | context;
650 trace_mmu_helper_tfault(address, context);
655 TTE_SET_USED(env->itlb[i].tte);
660 trace_mmu_helper_tmiss(address, context);
662 /* Context is stored in DMMU (dmmuregs[1]) also for IMMU */
663 env->immu.tag_access = (address & ~0x1fffULL) | context;
664 env->exception_index = TT_TMISS;
668 static int get_physical_address(CPUSPARCState *env, hwaddr *physical,
669 int *prot, int *access_index,
670 target_ulong address, int rw, int mmu_idx,
671 target_ulong *page_size)
673 /* ??? We treat everything as a small page, then explicitly flush
674 everything when an entry is evicted. */
675 *page_size = TARGET_PAGE_SIZE;
677 /* safety net to catch wrong softmmu index use from dynamic code */
678 if (env->tl > 0 && mmu_idx != MMU_NUCLEUS_IDX) {
680 trace_mmu_helper_get_phys_addr_code(env->tl, mmu_idx,
681 env->dmmu.mmu_primary_context,
682 env->dmmu.mmu_secondary_context,
685 trace_mmu_helper_get_phys_addr_data(env->tl, mmu_idx,
686 env->dmmu.mmu_primary_context,
687 env->dmmu.mmu_secondary_context,
693 return get_physical_address_code(env, physical, prot, address,
696 return get_physical_address_data(env, physical, prot, address, rw,
701 /* Perform address translation */
702 int cpu_sparc_handle_mmu_fault(CPUSPARCState *env, target_ulong address, int rw,
707 target_ulong page_size;
708 int error_code = 0, prot, access_index;
710 address &= TARGET_PAGE_MASK;
711 error_code = get_physical_address(env, &paddr, &prot, &access_index,
712 address, rw, mmu_idx, &page_size);
713 if (error_code == 0) {
716 trace_mmu_helper_mmu_fault(address, paddr, mmu_idx, env->tl,
717 env->dmmu.mmu_primary_context,
718 env->dmmu.mmu_secondary_context);
720 tlb_set_page(env, vaddr, paddr, prot, mmu_idx, page_size);
727 void dump_mmu(FILE *f, fprintf_function cpu_fprintf, CPUSPARCState *env)
732 (*cpu_fprintf)(f, "MMU contexts: Primary: %" PRId64 ", Secondary: %"
734 env->dmmu.mmu_primary_context,
735 env->dmmu.mmu_secondary_context);
736 if ((env->lsu & DMMU_E) == 0) {
737 (*cpu_fprintf)(f, "DMMU disabled\n");
739 (*cpu_fprintf)(f, "DMMU dump\n");
740 for (i = 0; i < 64; i++) {
741 switch (TTE_PGSIZE(env->dtlb[i].tte)) {
756 if (TTE_IS_VALID(env->dtlb[i].tte)) {
757 (*cpu_fprintf)(f, "[%02u] VA: %" PRIx64 ", PA: %llx"
758 ", %s, %s, %s, %s, ctx %" PRId64 " %s\n",
760 env->dtlb[i].tag & (uint64_t)~0x1fffULL,
761 TTE_PA(env->dtlb[i].tte),
763 TTE_IS_PRIV(env->dtlb[i].tte) ? "priv" : "user",
764 TTE_IS_W_OK(env->dtlb[i].tte) ? "RW" : "RO",
765 TTE_IS_LOCKED(env->dtlb[i].tte) ?
766 "locked" : "unlocked",
767 env->dtlb[i].tag & (uint64_t)0x1fffULL,
768 TTE_IS_GLOBAL(env->dtlb[i].tte) ?
773 if ((env->lsu & IMMU_E) == 0) {
774 (*cpu_fprintf)(f, "IMMU disabled\n");
776 (*cpu_fprintf)(f, "IMMU dump\n");
777 for (i = 0; i < 64; i++) {
778 switch (TTE_PGSIZE(env->itlb[i].tte)) {
793 if (TTE_IS_VALID(env->itlb[i].tte)) {
794 (*cpu_fprintf)(f, "[%02u] VA: %" PRIx64 ", PA: %llx"
795 ", %s, %s, %s, ctx %" PRId64 " %s\n",
797 env->itlb[i].tag & (uint64_t)~0x1fffULL,
798 TTE_PA(env->itlb[i].tte),
800 TTE_IS_PRIV(env->itlb[i].tte) ? "priv" : "user",
801 TTE_IS_LOCKED(env->itlb[i].tte) ?
802 "locked" : "unlocked",
803 env->itlb[i].tag & (uint64_t)0x1fffULL,
804 TTE_IS_GLOBAL(env->itlb[i].tte) ?
811 #endif /* TARGET_SPARC64 */
813 static int cpu_sparc_get_phys_page(CPUSPARCState *env, hwaddr *phys,
814 target_ulong addr, int rw, int mmu_idx)
816 target_ulong page_size;
817 int prot, access_index;
819 return get_physical_address(env, phys, &prot, &access_index, addr, rw,
820 mmu_idx, &page_size);
823 #if defined(TARGET_SPARC64)
824 hwaddr cpu_get_phys_page_nofault(CPUSPARCState *env, target_ulong addr,
829 if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 4, mmu_idx) != 0) {
836 hwaddr cpu_get_phys_page_debug(CPUSPARCState *env, target_ulong addr)
839 int mmu_idx = cpu_mmu_index(env);
840 MemoryRegionSection section;
842 if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 2, mmu_idx) != 0) {
843 if (cpu_sparc_get_phys_page(env, &phys_addr, addr, 0, mmu_idx) != 0) {
847 section = memory_region_find(get_system_memory(), phys_addr, 1);