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exec: eliminate io_mem_ram 

It is never used, the IOTLB always goes through io_mem_notdirty.

In fact in softmmu_template.h, if it were, QEMU would crash just
below the tests, as soon as io_mem_read/write dispatches to
error_mem_read/write.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-05-24 14:34:08 +02:00
parent 6a4e177114
commit 2a8e749909
3 changed files with 4 additions and 19 deletions
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18
exec.c
View File

@ -66,7 +66,7 @@ AddressSpace address_space_io;
AddressSpace address_space_memory;
DMAContext dma_context_memory;
MemoryRegion io_mem_ram, io_mem_rom, io_mem_unassigned, io_mem_notdirty;
MemoryRegion io_mem_rom, io_mem_unassigned, io_mem_notdirty;
static MemoryRegion io_mem_subpage_ram;
#endif
@ -200,8 +200,7 @@ MemoryRegionSection *phys_page_find(AddressSpaceDispatch *d, hwaddr index)
bool memory_region_is_unassigned(MemoryRegion *mr)
{
return mr != &io_mem_ram && mr != &io_mem_rom
&& mr != &io_mem_notdirty && !mr->rom_device
return mr != &io_mem_rom && mr != &io_mem_notdirty && !mr->rom_device
&& mr != &io_mem_watch;
}
#endif
@ -1419,18 +1418,6 @@ static uint64_t error_mem_read(void *opaque, hwaddr addr,
abort();
}
static void error_mem_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
abort();
}
static const MemoryRegionOps error_mem_ops = {
.read = error_mem_read,
.write = error_mem_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const MemoryRegionOps rom_mem_ops = {
.read = error_mem_read,
.write = unassigned_mem_write,
@ -1691,7 +1678,6 @@ MemoryRegion *iotlb_to_region(hwaddr index)
static void io_mem_init(void)
{
memory_region_init_io(&io_mem_ram, &error_mem_ops, NULL, "ram", UINT64_MAX);
memory_region_init_io(&io_mem_rom, &rom_mem_ops, NULL, "rom", UINT64_MAX);
memory_region_init_io(&io_mem_unassigned, &unassigned_mem_ops, NULL,
"unassigned", UINT64_MAX);

1
include/exec/cpu-common.h
View File

@ -110,7 +110,6 @@ void stq_phys(hwaddr addr, uint64_t val);
void cpu_physical_memory_write_rom(hwaddr addr,
const uint8_t *buf, int len);
extern struct MemoryRegion io_mem_ram;
extern struct MemoryRegion io_mem_rom;
extern struct MemoryRegion io_mem_unassigned;
extern struct MemoryRegion io_mem_notdirty;

4
include/exec/softmmu_template.h
View File

@ -68,7 +68,7 @@ static inline DATA_TYPE glue(io_read, SUFFIX)(CPUArchState *env,
physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
env->mem_io_pc = retaddr;
if (mr != &io_mem_ram && mr != &io_mem_rom
if (mr != &io_mem_rom
&& mr != &io_mem_unassigned
&& mr != &io_mem_notdirty
&& !can_do_io(env)) {
@ -218,7 +218,7 @@ static inline void glue(io_write, SUFFIX)(CPUArchState *env,
MemoryRegion *mr = iotlb_to_region(physaddr);
physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
if (mr != &io_mem_ram && mr != &io_mem_rom
if (mr != &io_mem_rom
&& mr != &io_mem_unassigned
&& mr != &io_mem_notdirty
&& !can_do_io(env)) {