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use qemu memory allocation - added dirty bit support when using host MMU

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@619 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2004-02-16 22:01:13 +00:00
parent bf3e8bf11e
commit 59817ccb2c
1 changed files with 97 additions and 34 deletions
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131
exec.c
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@ -143,7 +143,7 @@ static inline PageDesc *page_find_alloc(unsigned int index)
p = *lp;
if (!p) {
/* allocate if not found */
p = malloc(sizeof(PageDesc) * L2_SIZE);
p = qemu_malloc(sizeof(PageDesc) * L2_SIZE);
memset(p, 0, sizeof(PageDesc) * L2_SIZE);
*lp = p;
}
@ -173,7 +173,7 @@ static inline VirtPageDesc *virt_page_find_alloc(unsigned int index)
p = *lp;
if (!p) {
/* allocate if not found */
p = malloc(sizeof(VirtPageDesc) * L2_SIZE);
p = qemu_malloc(sizeof(VirtPageDesc) * L2_SIZE);
memset(p, 0, sizeof(VirtPageDesc) * L2_SIZE);
*lp = p;
}
@ -226,7 +226,7 @@ void cpu_exec_init(void)
static inline void invalidate_page_bitmap(PageDesc *p)
{
if (p->code_bitmap) {
free(p->code_bitmap);
qemu_free(p->code_bitmap);
p->code_bitmap = NULL;
}
p->code_write_count = 0;
@ -406,7 +406,7 @@ static inline void tb_invalidate(TranslationBlock *tb)
TranslationBlock *tb1, *tb2, **ptb;
tb_invalidated_flag = 1;
/* remove the TB from the hash list */
h = tb_hash_func(tb->pc);
ptb = &tb_hash[h];
@ -501,7 +501,7 @@ static void build_page_bitmap(PageDesc *p)
int n, tb_start, tb_end;
TranslationBlock *tb;
p->code_bitmap = malloc(TARGET_PAGE_SIZE / 8);
p->code_bitmap = qemu_malloc(TARGET_PAGE_SIZE / 8);
if (!p->code_bitmap)
return;
memset(p->code_bitmap, 0, TARGET_PAGE_SIZE / 8);
@ -585,7 +585,13 @@ static inline void tb_invalidate_phys_page_fast(target_ulong start, int len, tar
{
PageDesc *p;
int offset, b;
#if 0
if (cpu_single_env->cr[0] & CR0_PE_MASK) {
printf("modifying code at 0x%x size=%d EIP=%x\n",
(vaddr & TARGET_PAGE_MASK) | (start & ~TARGET_PAGE_MASK), len,
cpu_single_env->eip);
}
#endif
p = page_find(start >> TARGET_PAGE_BITS);
if (!p)
return;
@ -775,7 +781,12 @@ void tb_link(TranslationBlock *tb)
}
#endif
vp->phys_addr = tb->page_addr[0];
vp->valid_tag = virt_valid_tag;
if (vp->valid_tag != virt_valid_tag) {
vp->valid_tag = virt_valid_tag;
#if !defined(CONFIG_SOFTMMU)
vp->prot = 0;
#endif
}
if (tb->page_addr[1] != -1) {
addr += TARGET_PAGE_SIZE;
@ -788,7 +799,12 @@ void tb_link(TranslationBlock *tb)
}
#endif
vp->phys_addr = tb->page_addr[1];
vp->valid_tag = virt_valid_tag;
if (vp->valid_tag != virt_valid_tag) {
vp->valid_tag = virt_valid_tag;
#if !defined(CONFIG_SOFTMMU)
vp->prot = 0;
#endif
}
}
}
#endif
@ -971,7 +987,7 @@ void cpu_interrupt(CPUState *env, int mask)
{
TranslationBlock *tb;
static int interrupt_lock;
env->interrupt_request |= mask;
/* if the cpu is currently executing code, we must unlink it and
all the potentially executing TB */
@ -1172,7 +1188,7 @@ static inline void tlb_reset_dirty_range(CPUTLBEntry *tlb_entry,
void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end)
{
CPUState *env;
target_ulong length;
target_ulong length, start1;
int i;
start &= TARGET_PAGE_MASK;
@ -1186,11 +1202,39 @@ void cpu_physical_memory_reset_dirty(target_ulong start, target_ulong end)
env = cpu_single_env;
/* we modify the TLB cache so that the dirty bit will be set again
when accessing the range */
start += (unsigned long)phys_ram_base;
start1 = start + (unsigned long)phys_ram_base;
for(i = 0; i < CPU_TLB_SIZE; i++)
tlb_reset_dirty_range(&env->tlb_write[0][i], start, length);
tlb_reset_dirty_range(&env->tlb_write[0][i], start1, length);
for(i = 0; i < CPU_TLB_SIZE; i++)
tlb_reset_dirty_range(&env->tlb_write[1][i], start, length);
tlb_reset_dirty_range(&env->tlb_write[1][i], start1, length);
#if !defined(CONFIG_SOFTMMU)
/* XXX: this is expensive */
{
VirtPageDesc *p;
int j;
target_ulong addr;
for(i = 0; i < L1_SIZE; i++) {
p = l1_virt_map[i];
if (p) {
addr = i << (TARGET_PAGE_BITS + L2_BITS);
for(j = 0; j < L2_SIZE; j++) {
if (p->valid_tag == virt_valid_tag &&
p->phys_addr >= start && p->phys_addr < end &&
(p->prot & PROT_WRITE)) {
if (addr < MMAP_AREA_END) {
mprotect((void *)addr, TARGET_PAGE_SIZE,
p->prot & ~PROT_WRITE);
}
}
addr += TARGET_PAGE_SIZE;
p++;
}
}
}
}
#endif
}
static inline void tlb_set_dirty1(CPUTLBEntry *tlb_entry,
@ -1220,8 +1264,10 @@ static inline void tlb_set_dirty(unsigned long addr, target_ulong vaddr)
tlb_set_dirty1(&env->tlb_write[1][i], addr);
}
/* add a new TLB entry. At most one entry for a given virtual
address is permitted. */
/* add a new TLB entry. At most one entry for a given virtual address
is permitted. Return 0 if OK or 2 if the page could not be mapped
(can only happen in non SOFTMMU mode for I/O pages or pages
conflicting with the host address space). */
int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot,
int is_user, int is_softmmu)
{
@ -1301,25 +1347,33 @@ int tlb_set_page(CPUState *env, uint32_t vaddr, uint32_t paddr, int prot,
ret = 2;
} else {
void *map_addr;
if (prot & PROT_WRITE) {
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM || first_tb) {
/* ROM: we do as if code was inside */
/* if code is present, we only map as read only and save the
original mapping */
VirtPageDesc *vp;
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS);
vp->phys_addr = pd;
vp->prot = prot;
vp->valid_tag = virt_valid_tag;
prot &= ~PAGE_WRITE;
if (vaddr >= MMAP_AREA_END) {
ret = 2;
} else {
if (prot & PROT_WRITE) {
if ((pd & ~TARGET_PAGE_MASK) == IO_MEM_ROM ||
first_tb ||
((pd & ~TARGET_PAGE_MASK) == IO_MEM_RAM &&
!cpu_physical_memory_is_dirty(pd))) {
/* ROM: we do as if code was inside */
/* if code is present, we only map as read only and save the
original mapping */
VirtPageDesc *vp;
vp = virt_page_find_alloc(vaddr >> TARGET_PAGE_BITS);
vp->phys_addr = pd;
vp->prot = prot;
vp->valid_tag = virt_valid_tag;
prot &= ~PAGE_WRITE;
}
}
map_addr = mmap((void *)vaddr, TARGET_PAGE_SIZE, prot,
MAP_SHARED | MAP_FIXED, phys_ram_fd, (pd & TARGET_PAGE_MASK));
if (map_addr == MAP_FAILED) {
cpu_abort(env, "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
paddr, vaddr);
}
}
map_addr = mmap((void *)vaddr, TARGET_PAGE_SIZE, prot,
MAP_SHARED | MAP_FIXED, phys_ram_fd, (pd & TARGET_PAGE_MASK));
if (map_addr == MAP_FAILED) {
cpu_abort(env, "mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
paddr, vaddr);
}
}
}
@ -1338,6 +1392,10 @@ int page_unprotect(unsigned long addr)
printf("page_unprotect: addr=0x%08x\n", addr);
#endif
addr &= TARGET_PAGE_MASK;
/* if it is not mapped, no need to worry here */
if (addr >= MMAP_AREA_END)
return 0;
vp = virt_page_find(addr >> TARGET_PAGE_BITS);
if (!vp)
return 0;
@ -1351,8 +1409,13 @@ int page_unprotect(unsigned long addr)
printf("page_unprotect: addr=0x%08x phys_addr=0x%08x prot=%x\n",
addr, vp->phys_addr, vp->prot);
#endif
/* set the dirty bit */
phys_ram_dirty[vp->phys_addr >> TARGET_PAGE_BITS] = 1;
/* flush the code inside */
tb_invalidate_phys_page(vp->phys_addr);
mprotect((void *)addr, TARGET_PAGE_SIZE, vp->prot);
if (mprotect((void *)addr, TARGET_PAGE_SIZE, vp->prot) < 0)
cpu_abort(cpu_single_env, "error mprotect addr=0x%lx prot=%d\n",
(unsigned long)addr, vp->prot);
return 1;
#else
return 0;
@ -1642,7 +1705,7 @@ static void io_mem_init(void)
io_mem_nb = 5;
/* alloc dirty bits array */
phys_ram_dirty = malloc(phys_ram_size >> TARGET_PAGE_BITS);
phys_ram_dirty = qemu_malloc(phys_ram_size >> TARGET_PAGE_BITS);
}
/* mem_read and mem_write are arrays of functions containing the