/*
* sparc helpers
*
* Copyright (c) 2003-2005 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <signal.h>
#include <assert.h>
#include "cpu.h"
#include "exec-all.h"
//#define DEBUG_MMU
/* Sparc MMU emulation */
/* thread support */
spinlock_t global_cpu_lock = SPIN_LOCK_UNLOCKED;
void cpu_lock(void)
{
spin_lock(&global_cpu_lock);
}
void cpu_unlock(void)
{
spin_unlock(&global_cpu_lock);
}
#if defined(CONFIG_USER_ONLY)
int cpu_sparc_handle_mmu_fault(CPUState *env, target_ulong address, int rw,
int is_user, int is_softmmu)
{
if (rw & 2)
env->exception_index = TT_TFAULT;
else
env->exception_index = TT_DFAULT;
return 1;
}
#else
#ifndef TARGET_SPARC64
/*
* Sparc V8 Reference MMU (SRMMU)
*/
static const int access_table[8][8] = {
{ 0, 0, 0, 0, 2, 0, 3, 3 },
{ 0, 0, 0, 0, 2, 0, 0, 0 },
{ 2, 2, 0, 0, 0, 2, 3, 3 },
{ 2, 2, 0, 0, 0, 2, 0, 0 },
{ 2, 0, 2, 0, 2, 2, 3, 3 },
{ 2, 0, 2, 0, 2, 0, 2, 0 },
{ 2, 2, 2, 0, 2, 2, 3, 3 },
{ 2, 2, 2, 0, 2, 2, 2, 0 }
};
static const int perm_table[2][8] = {
{
PAGE_READ,
PAGE_READ | PAGE_WRITE,
PAGE_READ | PAGE_EXEC,
PAGE_READ | PAGE_WRITE | PAGE_EXEC,
PAGE_EXEC,
PAGE_READ | PAGE_WRITE,
PAGE_READ | PAGE_EXEC,
PAGE_READ | PAGE_WRITE | PAGE_EXEC
},
{
PAGE_READ,
PAGE_READ | PAGE_WRITE,
PAGE_READ | PAGE_EXEC,
PAGE_READ | PAGE_WRITE | PAGE_EXEC,
PAGE_EXEC,
PAGE_READ,
0,
0,
}
};
int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot,
int *access_index, target_ulong address, int rw,
int is_user)
{
int access_perms = 0;
target_phys_addr_t pde_ptr;
uint32_t pde;
target_ulong virt_addr;
int error_code = 0, is_dirty;
unsigned long page_offset;
virt_addr = address & TARGET_PAGE_MASK;
if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */
*physical = address;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return 0;
}
*access_index = ((rw & 1) << 2) | (rw & 2) | (is_user? 0 : 1);
*physical = 0xffffffffffff0000ULL;
/* SPARC reference MMU table walk: Context table->L1->L2->PTE */
/* Context base + context number */
pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2);
pde = ldl_phys(pde_ptr);
/* Ctx pde */
switch (pde & PTE_ENTRYTYPE_MASK) {
default:
case 0: /* Invalid */
return 1 << 2;
case 2: /* L0 PTE, maybe should not happen? */
case 3: /* Reserved */
return 4 << 2;
case 1: /* L0 PDE */
pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4);
pde = ldl_phys(pde_ptr);
switch (pde & PTE_ENTRYTYPE_MASK) {
default:
case 0: /* Invalid */
return (1 << 8) | (1 << 2);
case 3: /* Reserved */
return (1 << 8) | (4 << 2);
case 1: /* L1 PDE */
pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4);
pde = ldl_phys(pde_ptr);
switch (pde & PTE_ENTRYTYPE_MASK) {
default:
case 0: /* Invalid */
return (2 << 8) | (1 << 2);
case 3: /* Reserved */
return (2 << 8) | (4 << 2);
case 1: /* L2 PDE */
pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4);
pde = ldl_phys(pde_ptr);
switch (pde & PTE_ENTRYTYPE_MASK) {
default:
case 0: /* Invalid */
return (3 << 8) | (1 << 2);
case 1: /* PDE, should not happen */
case 3: /* Reserved */
return (3 << 8) | (4 << 2);
case 2: /* L3 PTE */
virt_addr = address & TARGET_PAGE_MASK;
page_offset = (address & TARGET_PAGE_MASK) & (TARGET_PAGE_SIZE - 1);
}
break;
case 2: /* L2 PTE */
virt_addr = address & ~0x3ffff;
page_offset = address & 0x3ffff;
}
break;
case 2: /* L1 PTE */
virt_addr = address & ~0xffffff;
page_offset = address & 0xffffff;
}
}
/* update page modified and dirty bits */
is_dirty = (rw & 1) && !(pde & PG_MODIFIED_MASK);
if (!(pde & PG_ACCESSED_MASK) || is_dirty) {
pde |= PG_ACCESSED_MASK;
if (is_dirty)
pde |= PG_MODIFIED_MASK;
stl_phys_notdirty(pde_ptr, pde);
}
/* check access */
access_perms = (pde & PTE_ACCESS_MASK) >> PTE_ACCESS_SHIFT;
error_code = access_table[*access_index][access_perms];
if (error_code && !((env->mmuregs[0] & MMU_NF) && is_user))
return error_code;
/* the page can be put in the TLB */
*prot = perm_table[is_user][access_perms];
if (!(pde & PG_MODIFIED_MASK)) {
/* only set write access if already dirty... otherwise wait
for dirty access */
*prot &= ~PAGE_WRITE;
}
/* Even if large ptes, we map only one 4KB page in the cache to
avoid filling it too fast */
*physical = ((target_phys_addr_t)(pde & PTE_ADDR_MASK) << 4) + page_offset;
return error_code;
}
/* Perform address translation */
int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int is_user, int is_softmmu)
{
target_phys_addr_t paddr;
target_ulong vaddr;
int error_code = 0, prot, ret = 0, access_index;
error_code = get_physical_address(env, &paddr, &prot, &access_index, address, rw, is_user);
if (error_code == 0) {
vaddr = address & TARGET_PAGE_MASK;
paddr &= TARGET_PAGE_MASK;
#ifdef DEBUG_MMU
printf("Translate at " TARGET_FMT_lx " -> " TARGET_FMT_plx ", vaddr "
TARGET_FMT_lx "\n", address, paddr, vaddr);
#endif
ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
return ret;
}
if (env->mmuregs[3]) /* Fault status register */
env->mmuregs[3] = 1; /* overflow (not read before another fault) */
env->mmuregs[3] |= (access_index << 5) | error_code | 2;
env->mmuregs[4] = address; /* Fault address register */
if ((env->mmuregs[0] & MMU_NF) || env->psret == 0) {
// No fault mode: if a mapping is available, just override
// permissions. If no mapping is available, redirect accesses to
// neverland. Fake/overridden mappings will be flushed when
// switching to normal mode.
vaddr = address & TARGET_PAGE_MASK;
prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
return ret;
} else {
if (rw & 2)
env->exception_index = TT_TFAULT;
else
env->exception_index = TT_DFAULT;
return 1;
}
}
target_ulong mmu_probe(CPUState *env, target_ulong address, int mmulev)
{
target_phys_addr_t pde_ptr;
uint32_t pde;
/* Context base + context number */
pde_ptr = (target_phys_addr_t)(env->mmuregs[1] << 4) +
(env->mmuregs[2] << 2);
pde = ldl_phys(pde_ptr);
switch (pde & PTE_ENTRYTYPE_MASK) {
default:
case 0: /* Invalid */
case 2: /* PTE, maybe should not happen? */
case 3: /* Reserved */
return 0;
case 1: /* L1 PDE */
if (mmulev == 3)
return pde;
pde_ptr = ((address >> 22) & ~3) + ((pde & ~3) << 4);
pde = ldl_phys(pde_ptr);
switch (pde & PTE_ENTRYTYPE_MASK) {
default:
case 0: /* Invalid */
case 3: /* Reserved */
return 0;
case 2: /* L1 PTE */
return pde;
case 1: /* L2 PDE */
if (mmulev == 2)
return pde;
pde_ptr = ((address & 0xfc0000) >> 16) + ((pde & ~3) << 4);
pde = ldl_phys(pde_ptr);
switch (pde & PTE_ENTRYTYPE_MASK) {
default:
case 0: /* Invalid */
case 3: /* Reserved */
return 0;
case 2: /* L2 PTE */
return pde;
case 1: /* L3 PDE */
if (mmulev == 1)
return pde;
pde_ptr = ((address & 0x3f000) >> 10) + ((pde & ~3) << 4);
pde = ldl_phys(pde_ptr);
switch (pde & PTE_ENTRYTYPE_MASK) {
default:
case 0: /* Invalid */
case 1: /* PDE, should not happen */
case 3: /* Reserved */
return 0;
case 2: /* L3 PTE */
return pde;
}
}
}
}
return 0;
}
#ifdef DEBUG_MMU
void dump_mmu(CPUState *env)
{
target_ulong va, va1, va2;
unsigned int n, m, o;
target_phys_addr_t pde_ptr, pa;
uint32_t pde;
printf("MMU dump:\n");
pde_ptr = (env->mmuregs[1] << 4) + (env->mmuregs[2] << 2);
pde = ldl_phys(pde_ptr);
printf("Root ptr: " TARGET_FMT_plx ", ctx: %d\n",
(target_phys_addr_t)env->mmuregs[1] << 4, env->mmuregs[2]);
for (n = 0, va = 0; n < 256; n++, va += 16 * 1024 * 1024) {
pde = mmu_probe(env, va, 2);
if (pde) {
pa = cpu_get_phys_page_debug(env, va);
printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_plx
" PDE: " TARGET_FMT_lx "\n", va, pa, pde);
for (m = 0, va1 = va; m < 64; m++, va1 += 256 * 1024) {
pde = mmu_probe(env, va1, 1);
if (pde) {
pa = cpu_get_phys_page_debug(env, va1);
printf(" VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_plx
" PDE: " TARGET_FMT_lx "\n", va1, pa, pde);
for (o = 0, va2 = va1; o < 64; o++, va2 += 4 * 1024) {
pde = mmu_probe(env, va2, 0);
if (pde) {
pa = cpu_get_phys_page_debug(env, va2);
printf(" VA: " TARGET_FMT_lx ", PA: "
TARGET_FMT_plx " PTE: " TARGET_FMT_lx "\n",
va2, pa, pde);
}
}
}
}
}
}
printf("MMU dump ends\n");
}
#endif /* DEBUG_MMU */
#else /* !TARGET_SPARC64 */
/*
* UltraSparc IIi I/DMMUs
*/
static int get_physical_address_data(CPUState *env, target_phys_addr_t *physical, int *prot,
int *access_index, target_ulong address, int rw,
int is_user)
{
target_ulong mask;
unsigned int i;
if ((env->lsu & DMMU_E) == 0) { /* DMMU disabled */
*physical = address;
*prot = PAGE_READ | PAGE_WRITE;
return 0;
}
for (i = 0; i < 64; i++) {
switch ((env->dtlb_tte[i] >> 61) & 3) {
default:
case 0x0: // 8k
mask = 0xffffffffffffe000ULL;
break;
case 0x1: // 64k
mask = 0xffffffffffff0000ULL;
break;
case 0x2: // 512k
mask = 0xfffffffffff80000ULL;
break;
case 0x3: // 4M
mask = 0xffffffffffc00000ULL;
break;
}
// ctx match, vaddr match?
if (env->dmmuregs[1] == (env->dtlb_tag[i] & 0x1fff) &&
(address & mask) == (env->dtlb_tag[i] & ~0x1fffULL)) {
// valid, access ok?
if ((env->dtlb_tte[i] & 0x8000000000000000ULL) == 0 ||
((env->dtlb_tte[i] & 0x4) && is_user) ||
(!(env->dtlb_tte[i] & 0x2) && (rw == 1))) {
if (env->dmmuregs[3]) /* Fault status register */
env->dmmuregs[3] = 2; /* overflow (not read before another fault) */
env->dmmuregs[3] |= (is_user << 3) | ((rw == 1) << 2) | 1;
env->dmmuregs[4] = address; /* Fault address register */
env->exception_index = TT_DFAULT;
#ifdef DEBUG_MMU
printf("DFAULT at 0x%" PRIx64 "\n", address);
#endif
return 1;
}
*physical = (env->dtlb_tte[i] & mask & 0x1fffffff000ULL) + (address & ~mask & 0x1fffffff000ULL);
*prot = PAGE_READ;
if (env->dtlb_tte[i] & 0x2)
*prot |= PAGE_WRITE;
return 0;
}
}
#ifdef DEBUG_MMU
printf("DMISS at 0x%" PRIx64 "\n", address);
#endif
env->exception_index = TT_DMISS;
return 1;
}
static int get_physical_address_code(CPUState *env, target_phys_addr_t *physical, int *prot,
int *access_index, target_ulong address, int rw,
int is_user)
{
target_ulong mask;
unsigned int i;
if ((env->lsu & IMMU_E) == 0) { /* IMMU disabled */
*physical = address;
*prot = PAGE_EXEC;
return 0;
}
for (i = 0; i < 64; i++) {
switch ((env->itlb_tte[i] >> 61) & 3) {
default:
case 0x0: // 8k
mask = 0xffffffffffffe000ULL;
break;
case 0x1: // 64k
mask = 0xffffffffffff0000ULL;
break;
case 0x2: // 512k
mask = 0xfffffffffff80000ULL;
break;
case 0x3: // 4M
mask = 0xffffffffffc00000ULL;
break;
}
// ctx match, vaddr match?
if (env->dmmuregs[1] == (env->itlb_tag[i] & 0x1fff) &&
(address & mask) == (env->itlb_tag[i] & ~0x1fffULL)) {
// valid, access ok?
if ((env->itlb_tte[i] & 0x8000000000000000ULL) == 0 ||
((env->itlb_tte[i] & 0x4) && is_user)) {
if (env->immuregs[3]) /* Fault status register */
env->immuregs[3] = 2; /* overflow (not read before another fault) */
env->immuregs[3] |= (is_user << 3) | 1;
env->exception_index = TT_TFAULT;
#ifdef DEBUG_MMU
printf("TFAULT at 0x%" PRIx64 "\n", address);
#endif
return 1;
}
*physical = (env->itlb_tte[i] & mask & 0x1fffffff000ULL) + (address & ~mask & 0x1fffffff000ULL);
*prot = PAGE_EXEC;
return 0;
}
}
#ifdef DEBUG_MMU
printf("TMISS at 0x%" PRIx64 "\n", address);
#endif
env->exception_index = TT_TMISS;
return 1;
}
int get_physical_address(CPUState *env, target_phys_addr_t *physical, int *prot,
int *access_index, target_ulong address, int rw,
int is_user)
{
if (rw == 2)
return get_physical_address_code(env, physical, prot, access_index, address, rw, is_user);
else
return get_physical_address_data(env, physical, prot, access_index, address, rw, is_user);
}
/* Perform address translation */
int cpu_sparc_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int is_user, int is_softmmu)
{
target_ulong virt_addr, vaddr;
target_phys_addr_t paddr;
int error_code = 0, prot, ret = 0, access_index;
error_code = get_physical_address(env, &paddr, &prot, &access_index, address, rw, is_user);
if (error_code == 0) {
virt_addr = address & TARGET_PAGE_MASK;
vaddr = virt_addr + ((address & TARGET_PAGE_MASK) & (TARGET_PAGE_SIZE - 1));
#ifdef DEBUG_MMU
printf("Translate at 0x%" PRIx64 " -> 0x%" PRIx64 ", vaddr 0x%" PRIx64 "\n", address, paddr, vaddr);
#endif
ret = tlb_set_page_exec(env, vaddr, paddr, prot, is_user, is_softmmu);
return ret;
}
// XXX
return 1;
}
#ifdef DEBUG_MMU
void dump_mmu(CPUState *env)
{
unsigned int i;
const char *mask;
printf("MMU contexts: Primary: %" PRId64 ", Secondary: %" PRId64 "\n", env->dmmuregs[1], env->dmmuregs[2]);
if ((env->lsu & DMMU_E) == 0) {
printf("DMMU disabled\n");
} else {
printf("DMMU dump:\n");
for (i = 0; i < 64; i++) {
switch ((env->dtlb_tte[i] >> 61) & 3) {
default:
case 0x0:
mask = " 8k";
break;
case 0x1:
mask = " 64k";
break;
case 0x2:
mask = "512k";
break;
case 0x3:
mask = " 4M";
break;
}
if ((env->dtlb_tte[i] & 0x8000000000000000ULL) != 0) {
printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx ", %s, %s, %s, %s, ctx %" PRId64 "\n",
env->dtlb_tag[i] & ~0x1fffULL,
env->dtlb_tte[i] & 0x1ffffffe000ULL,
mask,
env->dtlb_tte[i] & 0x4? "priv": "user",
env->dtlb_tte[i] & 0x2? "RW": "RO",
env->dtlb_tte[i] & 0x40? "locked": "unlocked",
env->dtlb_tag[i] & 0x1fffULL);
}
}
}
if ((env->lsu & IMMU_E) == 0) {
printf("IMMU disabled\n");
} else {
printf("IMMU dump:\n");
for (i = 0; i < 64; i++) {
switch ((env->itlb_tte[i] >> 61) & 3) {
default:
case 0x0:
mask = " 8k";
break;
case 0x1:
mask = " 64k";
break;
case 0x2:
mask = "512k";
break;
case 0x3:
mask = " 4M";
break;
}
if ((env->itlb_tte[i] & 0x8000000000000000ULL) != 0) {
printf("VA: " TARGET_FMT_lx ", PA: " TARGET_FMT_lx ", %s, %s, %s, ctx %" PRId64 "\n",
env->itlb_tag[i] & ~0x1fffULL,
env->itlb_tte[i] & 0x1ffffffe000ULL,
mask,
env->itlb_tte[i] & 0x4? "priv": "user",
env->itlb_tte[i] & 0x40? "locked": "unlocked",
env->itlb_tag[i] & 0x1fffULL);
}
}
}
}
#endif /* DEBUG_MMU */
#endif /* TARGET_SPARC64 */
#endif /* !CONFIG_USER_ONLY */
void memcpy32(target_ulong *dst, const target_ulong *src)
{
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[3];
dst[4] = src[4];
dst[5] = src[5];
dst[6] = src[6];
dst[7] = src[7];
}