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pc-testdev: support 8 and 16-bit accesses to 0xe0

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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>
This commit is contained in:
Paolo Bonzini 2013-07-22 15:54:26 +02:00 • committed by Anthony Liguori
parent f36a6382b8
commit b7faba7163
1 changed files with 9 additions and 2 deletions
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11
hw/misc/pc-testdev.c
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@ -80,13 +80,20 @@ static void test_ioport_write(void *opaque, hwaddr addr, uint64_t data,
unsigned len) unsigned len)
{ {
PCTestdev *dev = opaque; 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) static uint64_t test_ioport_read(void *opaque, hwaddr addr, unsigned len)
{ {
PCTestdev *dev = opaque; 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 = { static const MemoryRegionOps test_ioport_ops = {