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target-i386: simplify pte/vaddr calculation

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They can moved to after the dirty bit processing, and unified between
CR0.PG=1 and CR0.PG=0.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-05-27 14:44:49 +02:00
parent e8f6d00c30
commit e7e898a76a
1 changed files with 7 additions and 8 deletions
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15
target-i386/helper.c
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@ -527,7 +527,7 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr,
hwaddr paddr;
uint64_t rsvd_mask = PG_HI_RSVD_MASK;
uint32_t page_offset;
target_ulong vaddr, virt_addr;
target_ulong vaddr;
is_user = mmu_idx == MMU_USER_IDX;
#if defined(DEBUG_MMU)
@ -544,7 +544,6 @@ int x86_cpu_handle_mmu_fault(CPUState *cs, vaddr addr,
pte = (uint32_t)pte;
}
#endif
virt_addr = addr & TARGET_PAGE_MASK;
prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
page_size = 4096;
goto do_mapping;
@ -748,9 +747,6 @@ do_check_protect:
}
stl_phys_notdirty(cs->as, pte_addr, pte);
}
/* align to page_size */
pte &= ((PHYS_ADDR_MASK & ~(page_size - 1)) | 0xfff);
virt_addr = addr & ~(page_size - 1);
/* the page can be put in the TLB */
prot = PAGE_READ;
@ -771,11 +767,14 @@ do_check_protect:
do_mapping:
pte = pte & env->a20_mask;
/* align to page_size */
pte &= PG_ADDRESS_MASK & ~(page_size - 1);
/* Even if 4MB pages, we map only one 4KB page in the cache to
avoid filling it too fast */
page_offset = (addr & TARGET_PAGE_MASK) & (page_size - 1);
paddr = (pte & TARGET_PAGE_MASK) + page_offset;
vaddr = virt_addr + page_offset;
vaddr = addr & TARGET_PAGE_MASK;
page_offset = vaddr & (page_size - 1);
paddr = pte + page_offset;
tlb_set_page(cs, vaddr, paddr, prot, mmu_idx, page_size);
return 0;