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memory: unify the two branches of cpu_register_physical_memory_log() 

Identical except that the second branch knows its not modifying an existing
subpage.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-02-12 21:21:21 +02:00
parent 8636b9295b
commit 717cb7b259
1 changed files with 16 additions and 35 deletions
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51
exec.c
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@ -2625,7 +2625,6 @@ void cpu_register_physical_memory_log(MemoryRegionSection *section,
target_phys_addr_t start_addr = section->offset_within_address_space;
ram_addr_t size = section->size;
target_phys_addr_t addr, end_addr;
uint16_t *p;
CPUState *env;
ram_addr_t orig_size = size;
subpage_t *subpage;
@ -2638,43 +2637,25 @@ void cpu_register_physical_memory_log(MemoryRegionSection *section,
addr = start_addr;
do {
p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 0);
if (p && *p != phys_section_unassigned) {
uint16_t orig_memory= *p;
target_phys_addr_t start_addr2, end_addr2;
int need_subpage = 0;
MemoryRegion *mr = phys_sections[orig_memory].mr;
uint16_t *p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
uint16_t orig_memory = *p;
target_phys_addr_t start_addr2, end_addr2;
int need_subpage = 0;
MemoryRegion *mr = phys_sections[orig_memory].mr;
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2,
need_subpage);
if (need_subpage) {
if (!(mr->subpage)) {
subpage = subpage_init((addr & TARGET_PAGE_MASK),
p, orig_memory);
} else {
subpage = container_of(mr, subpage_t, iomem);
}
subpage_register(subpage, start_addr2, end_addr2,
section_index);
} else {
*p = section_index;
}
} else {
target_phys_addr_t start_addr2, end_addr2;
int need_subpage = 0;
p = phys_page_find_alloc(addr >> TARGET_PAGE_BITS, 1);
*p = section_index;
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr,
end_addr2, need_subpage);
if (need_subpage) {
CHECK_SUBPAGE(addr, start_addr, start_addr2, end_addr, end_addr2,
need_subpage);
if (need_subpage) {
if (!(mr->subpage)) {
subpage = subpage_init((addr & TARGET_PAGE_MASK),
p, phys_section_unassigned);
subpage_register(subpage, start_addr2, end_addr2,
section_index);
p, orig_memory);
} else {
subpage = container_of(mr, subpage_t, iomem);
}
subpage_register(subpage, start_addr2, end_addr2,
section_index);
} else {
*p = section_index;
}
addr += TARGET_PAGE_SIZE;
} while (addr != end_addr);