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exec: just use io_mem_read/io_mem_write for 8-byte I/O accesses 

The memory API is able to split it in two 4-byte accesses.

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 12:40:43 +02:00
parent 968a5627c8
commit a649b9168c
2 changed files with 2 additions and 30 deletions
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8
exec.c
View File

@ -2263,13 +2263,7 @@ static inline uint64_t ldq_phys_internal(hwaddr addr,
false);
if (l < 8 || !memory_access_is_direct(section->mr, false)) {
/* I/O case */
#ifdef TARGET_WORDS_BIGENDIAN
val = io_mem_read(section->mr, addr1, 4) << 32;
val |= io_mem_read(section->mr, addr1 + 4, 4);
#else
val = io_mem_read(section->mr, addr1, 4);
val |= io_mem_read(section->mr, addr1 + 4, 4) << 32;
#endif
val = io_mem_read(section->mr, addr1, 8);
#if defined(TARGET_WORDS_BIGENDIAN)
if (endian == DEVICE_LITTLE_ENDIAN) {
val = bswap64(val);

24
include/exec/softmmu_template.h
View File

@ -63,7 +63,6 @@ static inline DATA_TYPE glue(io_read, SUFFIX)(CPUArchState *env,
target_ulong addr,
uintptr_t retaddr)
{
DATA_TYPE res;
MemoryRegion *mr = iotlb_to_region(physaddr);
physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
@ -73,18 +72,7 @@ static inline DATA_TYPE glue(io_read, SUFFIX)(CPUArchState *env,
}
env->mem_io_vaddr = addr;
#if SHIFT <= 2
res = io_mem_read(mr, physaddr, 1 << SHIFT);
#else
#ifdef TARGET_WORDS_BIGENDIAN
res = io_mem_read(mr, physaddr, 4) << 32;
res |= io_mem_read(mr, physaddr + 4, 4);
#else
res = io_mem_read(mr, physaddr, 4);
res |= io_mem_read(mr, physaddr + 4, 4) << 32;
#endif
#endif /* SHIFT > 2 */
return res;
return io_mem_read(mr, physaddr, 1 << SHIFT);
}
/* handle all cases except unaligned access which span two pages */
@ -221,17 +209,7 @@ static inline void glue(io_write, SUFFIX)(CPUArchState *env,
env->mem_io_vaddr = addr;
env->mem_io_pc = retaddr;
#if SHIFT <= 2
io_mem_write(mr, physaddr, val, 1 << SHIFT);
#else
#ifdef TARGET_WORDS_BIGENDIAN
io_mem_write(mr, physaddr, (val >> 32), 4);
io_mem_write(mr, physaddr + 4, (uint32_t)val, 4);
#else
io_mem_write(mr, physaddr, (uint32_t)val, 4);
io_mem_write(mr, physaddr + 4, val >> 32, 4);
#endif
#endif /* SHIFT > 2 */
}
void glue(glue(helper_st, SUFFIX), MMUSUFFIX)(CPUArchState *env,