pc-testdev: support 8 and 16-bit accesses to 0xe0
This will let us use the testdev to test endianness.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Message-id: 1374501278-31549-17-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/misc/pc-testdev.c b/hw/misc/pc-testdev.c
index 699a16f..6588ea2 100644
--- a/hw/misc/pc-testdev.c
+++ b/hw/misc/pc-testdev.c
@@ -80,13 +80,20 @@
unsigned len)
{
PCTestdev *dev = opaque;
- dev->ioport_data = data;
+ int bits = len * 8;
+ int start_bit = (addr & 3) * 8;
+ uint32_t mask = ((uint32_t)-1 >> (32 - bits)) << start_bit;
+ dev->ioport_data &= ~mask;
+ dev->ioport_data |= data << start_bit;
}
static uint64_t test_ioport_read(void *opaque, hwaddr addr, unsigned len)
{
PCTestdev *dev = opaque;
- return dev->ioport_data;
+ int bits = len * 8;
+ int start_bit = (addr & 3) * 8;
+ uint32_t mask = ((uint32_t)-1 >> (32 - bits)) << start_bit;
+ return (dev->ioport_data & mask) >> start_bit;
}
static const MemoryRegionOps test_ioport_ops = {
