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exec: implement .valid.accepts for subpages

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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 14:02:39 +02:00
parent d2702032b4
commit c353e4cc08
1 changed files with 20 additions and 0 deletions
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20
exec.c
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@ -1558,9 +1558,29 @@ static void subpage_write(void *opaque, hwaddr addr,
io_mem_write(section->mr, addr, value, len);
}
static bool subpage_accepts(void *opaque, hwaddr addr,
unsigned size, bool is_write)
{
subpage_t *mmio = opaque;
unsigned int idx = SUBPAGE_IDX(addr);
MemoryRegionSection *section;
#if defined(DEBUG_SUBPAGE)
printf("%s: subpage %p %c len %d addr " TARGET_FMT_plx
" idx %d\n", __func__, mmio,
is_write ? 'w' : 'r', len, addr, idx);
#endif
section = &phys_sections[mmio->sub_section[idx]];
addr += mmio->base;
addr -= section->offset_within_address_space;
addr += section->offset_within_region;
return memory_region_access_valid(section->mr, addr, size, is_write);
}
static const MemoryRegionOps subpage_ops = {
.read = subpage_read,
.write = subpage_write,
.valid.accepts = subpage_accepts,
.endianness = DEVICE_NATIVE_ENDIAN,
};