diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2013-07-22 15:54:26 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2013-07-25 08:12:27 -0500 |
| commit | b7faba71635cc4b16bb1472614aa497554797af6 (patch) | |
| tree | d5c61b364df565a6f26af7870717aac1a257c67f /hw/misc | |
| parent | f36a6382b8fb9677fd542b9c59b1ea1ad40ee9cf (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')
| -rw-r--r-- | hw/misc/pc-testdev.c | 11 |
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 = { |