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target-i386: cleanup x86_cpu_get_phys_page_debug 

Make the code a bit more similar to x86_cpu_handle_mmu_fault.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-05-27 14:58:47 +02:00
parent b09481de91
commit 16b96f82cd
1 changed files with 17 additions and 18 deletions
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35
target-i386/helper.c
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@ -811,7 +811,6 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
CPUX86State *env = &cpu->env; CPUX86State *env = &cpu->env;
target_ulong pde_addr, pte_addr; target_ulong pde_addr, pte_addr;
uint64_t pte; uint64_t pte;
hwaddr paddr;
uint32_t page_offset; uint32_t page_offset;
int page_size; int page_size;
@ -829,25 +828,24 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
/* test virtual address sign extension */ /* test virtual address sign extension */
sext = (int64_t)addr >> 47; sext = (int64_t)addr >> 47;
if (sext != 0 && sext != -1) if (sext != 0 && sext != -1) {
return -1; return -1;
}
pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) & pml4e_addr = ((env->cr[3] & ~0xfff) + (((addr >> 39) & 0x1ff) << 3)) &
env->a20_mask; env->a20_mask;
pml4e = ldq_phys(cs->as, pml4e_addr); pml4e = ldq_phys(cs->as, pml4e_addr);
if (!(pml4e & PG_PRESENT_MASK)) if (!(pml4e & PG_PRESENT_MASK)) {
return -1; return -1;
}
pdpe_addr = ((pml4e & ~0xfff & ~(PG_NX_MASK | PG_HI_USER_MASK)) + pdpe_addr = ((pml4e & PG_ADDRESS_MASK) +
(((addr >> 30) & 0x1ff) << 3)) & env->a20_mask; (((addr >> 30) & 0x1ff) << 3)) & env->a20_mask;
pdpe = ldq_phys(cs->as, pdpe_addr); pdpe = ldq_phys(cs->as, pdpe_addr);
if (!(pdpe & PG_PRESENT_MASK)) if (!(pdpe & PG_PRESENT_MASK)) {
return -1; return -1;
}
if (pdpe & PG_PSE_MASK) { if (pdpe & PG_PSE_MASK) {
page_size = 1024 * 1024 * 1024; page_size = 1024 * 1024 * 1024;
pte = pdpe & ~( (page_size - 1) & ~0xfff); pte = pdpe;
pte &= ~(PG_NX_MASK | PG_HI_USER_MASK);
goto out; goto out;
} }
@ -861,7 +859,7 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
return -1; return -1;
} }
pde_addr = ((pdpe & ~0xfff & ~(PG_NX_MASK | PG_HI_USER_MASK)) + pde_addr = ((pdpe & PG_ADDRESS_MASK) +
(((addr >> 21) & 0x1ff) << 3)) & env->a20_mask; (((addr >> 21) & 0x1ff) << 3)) & env->a20_mask;
pde = ldq_phys(cs->as, pde_addr); pde = ldq_phys(cs->as, pde_addr);
if (!(pde & PG_PRESENT_MASK)) { if (!(pde & PG_PRESENT_MASK)) {
@ -870,17 +868,17 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
if (pde & PG_PSE_MASK) { if (pde & PG_PSE_MASK) {
/* 2 MB page */ /* 2 MB page */
page_size = 2048 * 1024; page_size = 2048 * 1024;
pte = pde & ~( (page_size - 1) & ~0xfff); /* align to page_size */ pte = pde;
} else { } else {
/* 4 KB page */ /* 4 KB page */
pte_addr = ((pde & ~0xfff & ~(PG_NX_MASK | PG_HI_USER_MASK)) + pte_addr = ((pde & PG_ADDRESS_MASK) +
(((addr >> 12) & 0x1ff) << 3)) & env->a20_mask; (((addr >> 12) & 0x1ff) << 3)) & env->a20_mask;
page_size = 4096; page_size = 4096;
pte = ldq_phys(cs->as, pte_addr); pte = ldq_phys(cs->as, pte_addr);
} }
pte &= ~(PG_NX_MASK | PG_HI_USER_MASK); if (!(pte & PG_PRESENT_MASK)) {
if (!(pte & PG_PRESENT_MASK))
return -1; return -1;
}
} else { } else {
uint32_t pde; uint32_t pde;
@ -896,8 +894,9 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
/* page directory entry */ /* page directory entry */
pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & env->a20_mask; pte_addr = ((pde & ~0xfff) + ((addr >> 10) & 0xffc)) & env->a20_mask;
pte = ldl_phys(cs->as, pte_addr); pte = ldl_phys(cs->as, pte_addr);
if (!(pte & PG_PRESENT_MASK)) if (!(pte & PG_PRESENT_MASK)) {
return -1; return -1;
}
page_size = 4096; page_size = 4096;
} }
pte = pte & env->a20_mask; pte = pte & env->a20_mask;
@ -906,9 +905,9 @@ hwaddr x86_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
#ifdef TARGET_X86_64 #ifdef TARGET_X86_64
out: out:
#endif #endif
pte &= PG_ADDRESS_MASK & ~(page_size - 1);
page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1); page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1);
paddr = (pte & TARGET_PAGE_MASK) + page_offset; return pte | page_offset;
return paddr;
} }
void hw_breakpoint_insert(CPUX86State *env, int index) void hw_breakpoint_insert(CPUX86State *env, int index)