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memory: store section indices in iotlb instead of io indices

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A step towards eliminating io indices.

Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2012-03-08 17:06:55 +02:00
parent f3705d5329
commit aa102231f0
3 changed files with 24 additions and 8 deletions
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23
exec.c
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@ -191,6 +191,9 @@ typedef struct PhysPageEntry PhysPageEntry;
static MemoryRegionSection *phys_sections;
static unsigned phys_sections_nb, phys_sections_nb_alloc;
static uint16_t phys_section_unassigned;
static uint16_t phys_section_notdirty;
static uint16_t phys_section_rom;
static uint16_t phys_section_watch;
struct PhysPageEntry {
uint16_t is_leaf : 1;
@ -2214,9 +2217,9 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
iotlb = (memory_region_get_ram_addr(section->mr) & TARGET_PAGE_MASK)
+ section_addr(section, paddr);
if (!section->readonly)
iotlb |= io_mem_notdirty.ram_addr;
iotlb |= phys_section_notdirty;
else
iotlb |= io_mem_rom.ram_addr;
iotlb |= phys_section_rom;
} else {
/* IO handlers are currently passed a physical address.
It would be nice to pass an offset from the base address
@ -2224,7 +2227,7 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
and avoid full address decoding in every device.
We can't use the high bits of pd for this because
IO_MEM_ROMD uses these as a ram address. */
iotlb = memory_region_get_ram_addr(section->mr) & ~TARGET_PAGE_MASK;
iotlb = section - phys_sections;
iotlb += section_addr(section, paddr);
}
@ -2235,7 +2238,7 @@ void tlb_set_page(CPUState *env, target_ulong vaddr,
if (vaddr == (wp->vaddr & TARGET_PAGE_MASK)) {
/* Avoid trapping reads of pages with a write breakpoint. */
if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) {
iotlb = io_mem_watch.ram_addr + paddr;
iotlb = phys_section_watch + paddr;
address |= TLB_MMIO;
break;
}
@ -3559,6 +3562,15 @@ static uint16_t dummy_section(MemoryRegion *mr)
return phys_section_add(&section);
}
target_phys_addr_t section_to_ioaddr(target_phys_addr_t section_io_addr)
{
MemoryRegionSection *section;
section = &phys_sections[section_io_addr & ~TARGET_PAGE_MASK];
return (section_io_addr & TARGET_PAGE_MASK)
| (section->mr->ram_addr & ~TARGET_PAGE_MASK);
}
static void io_mem_init(void)
{
int i;
@ -3586,6 +3598,9 @@ static void core_begin(MemoryListener *listener)
phys_sections_clear();
phys_map.ptr = PHYS_MAP_NODE_NIL;
phys_section_unassigned = dummy_section(&io_mem_unassigned);
phys_section_notdirty = dummy_section(&io_mem_notdirty);
phys_section_rom = dummy_section(&io_mem_rom);
phys_section_watch = dummy_section(&io_mem_watch);
}
static void core_commit(MemoryListener *listener)