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full softmmu support

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@410 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-10-27 21:22:23 +00:00
parent 3a51dee658
commit 61382a500a
10 changed files with 599 additions and 344 deletions
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80
target-i386/helper2.c
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@ -210,7 +210,9 @@ void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr)
flags = page_get_flags(addr);
if (flags & PAGE_VALID) {
virt_addr = addr & ~0xfff;
#if !defined(CONFIG_SOFTMMU)
munmap((void *)virt_addr, 4096);
#endif
page_set_flags(virt_addr, virt_addr + 4096, 0);
}
}
@ -221,16 +223,14 @@ void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr)
1 = generate PF fault
2 = soft MMU activation required for this block
*/
int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr,
int is_write, int is_user, int is_softmmu)
{
uint8_t *pde_ptr, *pte_ptr;
uint32_t pde, pte, virt_addr;
int cpl, error_code, is_dirty, is_user, prot, page_size, ret;
int error_code, is_dirty, prot, page_size, ret;
unsigned long pd;
cpl = env->hflags & HF_CPL_MASK;
is_user = (cpl == 3);
#ifdef DEBUG_MMU
printf("MMU fault: addr=0x%08x w=%d u=%d eip=%08x\n",
addr, is_write, is_user, env->eip);
@ -252,7 +252,7 @@ int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
/* page directory entry */
pde_ptr = phys_ram_base + ((env->cr[3] & ~0xfff) + ((addr >> 20) & ~3));
pde = ldl(pde_ptr);
pde = ldl_raw(pde_ptr);
if (!(pde & PG_PRESENT_MASK)) {
error_code = 0;
goto do_fault;
@ -274,7 +274,7 @@ int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
pde |= PG_ACCESSED_MASK;
if (is_dirty)
pde |= PG_DIRTY_MASK;
stl(pde_ptr, pde);
stl_raw(pde_ptr, pde);
}
pte = pde & ~0x003ff000; /* align to 4MB */
@ -283,12 +283,12 @@ int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
} else {
if (!(pde & PG_ACCESSED_MASK)) {
pde |= PG_ACCESSED_MASK;
stl(pde_ptr, pde);
stl_raw(pde_ptr, pde);
}
/* page directory entry */
pte_ptr = phys_ram_base + ((pde & ~0xfff) + ((addr >> 10) & 0xffc));
pte = ldl(pte_ptr);
pte = ldl_raw(pte_ptr);
if (!(pte & PG_PRESENT_MASK)) {
error_code = 0;
goto do_fault;
@ -308,7 +308,7 @@ int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
pte |= PG_ACCESSED_MASK;
if (is_dirty)
pte |= PG_DIRTY_MASK;
stl(pte_ptr, pte);
stl_raw(pte_ptr, pte);
}
page_size = 4096;
virt_addr = addr & ~0xfff;
@ -325,7 +325,10 @@ int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
}
do_mapping:
if (env->hflags & HF_SOFTMMU_MASK) {
#if !defined(CONFIG_SOFTMMU)
if (is_softmmu)
#endif
{
unsigned long paddr, vaddr, address, addend, page_offset;
int index;
@ -352,32 +355,39 @@ int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write)
env->tlb_write[is_user][index].address = address;
env->tlb_write[is_user][index].addend = addend;
}
}
ret = 0;
/* XXX: incorrect for 4MB pages */
pd = physpage_find(pte & ~0xfff);
if ((pd & 0xfff) != 0) {
/* IO access: no mapping is done as it will be handled by the
soft MMU */
if (!(env->hflags & HF_SOFTMMU_MASK))
ret = 2;
} else {
void *map_addr;
map_addr = mmap((void *)virt_addr, page_size, prot,
MAP_SHARED | MAP_FIXED, phys_ram_fd, pd);
if (map_addr == MAP_FAILED) {
fprintf(stderr,
"mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
pte & ~0xfff, virt_addr);
exit(1);
}
#ifdef DEBUG_MMU
printf("mmaping 0x%08x to virt 0x%08x pse=%d\n",
pte & ~0xfff, virt_addr, (page_size != 4096));
#endif
page_set_flags(virt_addr, virt_addr + page_size,
page_set_flags(vaddr, vaddr + TARGET_PAGE_SIZE,
PAGE_VALID | PAGE_EXEC | prot);
ret = 0;
}
#if !defined(CONFIG_SOFTMMU)
else {
ret = 0;
/* XXX: incorrect for 4MB pages */
pd = physpage_find(pte & ~0xfff);
if ((pd & 0xfff) != 0) {
/* IO access: no mapping is done as it will be handled by the
soft MMU */
if (!(env->hflags & HF_SOFTMMU_MASK))
ret = 2;
} else {
void *map_addr;
map_addr = mmap((void *)virt_addr, page_size, prot,
MAP_SHARED | MAP_FIXED, phys_ram_fd, pd);
if (map_addr == MAP_FAILED) {
fprintf(stderr,
"mmap failed when mapped physical address 0x%08x to virtual address 0x%08x\n",
pte & ~0xfff, virt_addr);
exit(1);
}
#ifdef DEBUG_MMU
printf("mmaping 0x%08x to virt 0x%08x pse=%d\n",
pte & ~0xfff, virt_addr, (page_size != 4096));
#endif
page_set_flags(virt_addr, virt_addr + page_size,
PAGE_VALID | PAGE_EXEC | prot);
}
}
#endif
return ret;
do_fault_protect:
error_code = PG_ERROR_P_MASK;