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authorPaolo Bonzini <pbonzini@redhat.com>2013-07-22 15:54:26 +0200
committerAnthony Liguori <aliguori@us.ibm.com>2013-07-25 08:12:27 -0500
commitb7faba71635cc4b16bb1472614aa497554797af6 (patch)
treed5c61b364df565a6f26af7870717aac1a257c67f /hw/misc/pc-testdev.c
parentf36a6382b8fb9677fd542b9c59b1ea1ad40ee9cf (diff)
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>
Diffstat (limited to 'hw/misc/pc-testdev.c')
-rw-r--r--hw/misc/pc-testdev.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/hw/misc/pc-testdev.c b/hw/misc/pc-testdev.c
index 699a16ffbe..6588ea23a5 100644
--- a/hw/misc/pc-testdev.c
+++ b/hw/misc/pc-testdev.c
@@ -80,13 +80,20 @@ static void test_ioport_write(void *opaque, hwaddr addr, uint64_t data,
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 = {