haraldwolff/qemu-patch-raspberry4
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memory: check memory region endianness, not target's

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When combining multiple accesses into a single value, we need to do so
in the device's desired endianness.  The target endianness does not have
any influence.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1374501278-31549-28-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Paolo Bonzini 2013-07-22 15:54:37 +02:00 committed by Anthony Liguori
parent 547e9201c5
commit e7342aa39b
1 changed files with 18 additions and 7 deletions
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25
memory.c
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@ -339,6 +339,15 @@ static void flatview_simplify(FlatView *view)
}
}
static bool memory_region_big_endian(MemoryRegion *mr)
{
#ifdef TARGET_WORDS_BIGENDIAN
return mr->ops->endianness != DEVICE_LITTLE_ENDIAN;
#else
return mr->ops->endianness == DEVICE_BIG_ENDIAN;
#endif
}
static bool memory_region_wrong_endianness(MemoryRegion *mr)
{
#ifdef TARGET_WORDS_BIGENDIAN
@ -454,13 +463,15 @@ static void access_with_adjusted_size(hwaddr addr,
/* FIXME: support unaligned access? */
access_size = MAX(MIN(size, access_size_max), access_size_min);
access_mask = -1ULL >> (64 - access_size * 8);
for (i = 0; i < size; i += access_size) {
#ifdef TARGET_WORDS_BIGENDIAN
access(mr, addr + i, value, access_size,
(size - access_size - i) * 8, access_mask);
#else
access(mr, addr + i, value, access_size, i * 8, access_mask);
#endif
if (memory_region_big_endian(mr)) {
for (i = 0; i < size; i += access_size) {
access(mr, addr + i, value, access_size,
(size - access_size - i) * 8, access_mask);
}
} else {
for (i = 0; i < size; i += access_size) {
access(mr, addr + i, value, access_size, i * 8, access_mask);
}
}
}