On 11/01/2015 04:57, sfel...@gmail.com wrote:
> +static const MemoryRegionOps rocker_mmio_ops = {
> + .read = rocker_mmio_read,
> + .write = rocker_mmio_write,
> + .endianness = DEVICE_LITTLE_ENDIAN,
> + .valid = {
> + .min_access_size = 4,
> + .max_access_size = 8,
> + },
> + .impl = {
> + .min_access_size = 4,
> + .max_access_size = 8,
> + },
> +};
I suggest that you only use 32-bit registers in the internal
implementation, where writing to the low part of a 64-bit register only
writes to a latch. You can then use .impl.max_access_size == 4 but keep
.valid.max_access_size == 8.
QEMU will then take care of passing 64-bit writes down as two 32-bit
writes, in increasing address.
Paolo
