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64 bit virtual addressing fix

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1525 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-07-24 10:17:31 +00:00
parent 9529397248
commit 90f18422d9
1 changed files with 97 additions and 27 deletions
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124
exec.c
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@ -83,6 +83,8 @@ typedef struct PhysPageDesc {
uint32_t phys_offset;
} PhysPageDesc;
/* Note: the VirtPage handling is absolete and will be suppressed
ASAP */
typedef struct VirtPageDesc {
/* physical address of code page. It is valid only if 'valid_tag'
matches 'virt_valid_tag' */
@ -113,7 +115,13 @@ static PageDesc *l1_map[L1_SIZE];
PhysPageDesc **l1_phys_map;
#if !defined(CONFIG_USER_ONLY)
#if TARGET_LONG_BITS > 32
#define VIRT_L_BITS 9
#define VIRT_L_SIZE (1 << VIRT_L_BITS)
static void *l1_virt_map[VIRT_L_SIZE];
#else
static VirtPageDesc *l1_virt_map[L1_SIZE];
#endif
static unsigned int virt_valid_tag;
#endif
@ -234,51 +242,113 @@ static inline PhysPageDesc *phys_page_find(unsigned int index)
static void tlb_protect_code(CPUState *env, target_ulong addr);
static void tlb_unprotect_code_phys(CPUState *env, unsigned long phys_addr, target_ulong vaddr);
static inline VirtPageDesc *virt_page_find_alloc(unsigned int index)
static VirtPageDesc *virt_page_find_alloc(target_ulong index, int alloc)
{
VirtPageDesc **lp, *p;
/* XXX: should not truncate for 64 bit addresses */
#if TARGET_LONG_BITS > 32
index &= (L1_SIZE - 1);
#endif
void **p, **lp;
p = l1_virt_map;
lp = p + ((index >> (5 * VIRT_L_BITS)) & (VIRT_L_SIZE - 1));
p = *lp;
if (!p) {
if (!alloc)
return NULL;
p = qemu_mallocz(sizeof(void *) * VIRT_L_SIZE);
*lp = p;
}
lp = p + ((index >> (4 * VIRT_L_BITS)) & (VIRT_L_SIZE - 1));
p = *lp;
if (!p) {
if (!alloc)
return NULL;
p = qemu_mallocz(sizeof(void *) * VIRT_L_SIZE);
*lp = p;
}
lp = p + ((index >> (3 * VIRT_L_BITS)) & (VIRT_L_SIZE - 1));
p = *lp;
if (!p) {
if (!alloc)
return NULL;
p = qemu_mallocz(sizeof(void *) * VIRT_L_SIZE);
*lp = p;
}
lp = p + ((index >> (2 * VIRT_L_BITS)) & (VIRT_L_SIZE - 1));
p = *lp;
if (!p) {
if (!alloc)
return NULL;
p = qemu_mallocz(sizeof(void *) * VIRT_L_SIZE);
*lp = p;
}
lp = p + ((index >> (1 * VIRT_L_BITS)) & (VIRT_L_SIZE - 1));
p = *lp;
if (!p) {
if (!alloc)
return NULL;
p = qemu_mallocz(sizeof(VirtPageDesc) * VIRT_L_SIZE);
*lp = p;
}
return ((VirtPageDesc *)p) + (index & (VIRT_L_SIZE - 1));
#else
VirtPageDesc *p, **lp;
lp = &l1_virt_map[index >> L2_BITS];
p = *lp;
if (!p) {
/* allocate if not found */
p = qemu_malloc(sizeof(VirtPageDesc) * L2_SIZE);
memset(p, 0, sizeof(VirtPageDesc) * L2_SIZE);
if (!alloc)
return NULL;
p = qemu_mallocz(sizeof(VirtPageDesc) * L2_SIZE);
*lp = p;
}
return p + (index & (L2_SIZE - 1));
#endif
}
static inline VirtPageDesc *virt_page_find(unsigned int index)
static inline VirtPageDesc *virt_page_find(target_ulong index)
{
VirtPageDesc *p;
p = l1_virt_map[index >> L2_BITS];
if (!p)
return 0;
return p + (index & (L2_SIZE - 1));
return virt_page_find_alloc(index, 0);
}
#if TARGET_LONG_BITS > 32
static void virt_page_flush_internal(void **p, int level)
{
int i;
if (level == 0) {
VirtPageDesc *q = (VirtPageDesc *)p;
for(i = 0; i < VIRT_L_SIZE; i++)
q[i].valid_tag = 0;
} else {
level--;
for(i = 0; i < VIRT_L_SIZE; i++) {
if (p[i])
virt_page_flush_internal(p[i], level);
}
}
}
#endif
static void virt_page_flush(void)
{
int i, j;
VirtPageDesc *p;
virt_valid_tag++;
if (virt_valid_tag == 0) {
virt_valid_tag = 1;
for(i = 0; i < L1_SIZE; i++) {
p = l1_virt_map[i];
if (p) {
for(j = 0; j < L2_SIZE; j++)
p[j].valid_tag = 0;
#if TARGET_LONG_BITS > 32
virt_page_flush_internal(l1_virt_map, 5);
#else
{
int i, j;
VirtPageDesc *p;
for(i = 0; i < L1_SIZE; i++) {
p = l1_virt_map[i];
if (p) {
for(j = 0; j < L2_SIZE; j++)
p[j].valid_tag = 0;
}
}
}
#endif
}
}
#else
@ -945,7 +1015,7 @@ void tb_link(TranslationBlock *tb)
/* save the code memory mappings (needed to invalidate the code) */
addr = tb->pc & TARGET_PAGE_MASK;
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS);
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
#ifdef DEBUG_TLB_CHECK
if (vp->valid_tag == virt_valid_tag &&
vp->phys_addr != tb->page_addr[0]) {
@ -963,7 +1033,7 @@ void tb_link(TranslationBlock *tb)
if (tb->page_addr[1] != -1) {
addr += TARGET_PAGE_SIZE;
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS);
vp = virt_page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
#ifdef DEBUG_TLB_CHECK
if (vp->valid_tag == virt_valid_tag &&
vp->phys_addr != tb->page_addr[1]) {
@ -1572,7 +1642,7 @@ int tlb_set_page(CPUState *env, target_ulong vaddr,
addend = (unsigned long)phys_ram_base + (pd & TARGET_PAGE_MASK);
}
index = (vaddr >> 12) & (CPU_TLB_SIZE - 1);
index = (vaddr >> TARGET_PAGE_BITS) & (CPU_TLB_SIZE - 1);
addend -= vaddr;
if (prot & PAGE_READ) {
env->tlb_read[is_user][index].address = address;
@ -1635,7 +1705,7 @@ int tlb_set_page(CPUState *env, target_ulong vaddr,
original mapping */
VirtPageDesc *vp;
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS);
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS, 1);
vp->phys_addr = pd;
vp->prot = prot;
vp->valid_tag = virt_valid_tag;