On 2012-02-09 04:21, Wen Congyang wrote:
> This API will be used in the following patch.
>
> Signed-off-by: Wen Congyang <we...@cn.fujitsu.com>
> ---
> cpu-common.h | 2 ++
> exec.c | 16 ++++++++++++++++
> 2 files changed, 18 insertions(+), 0 deletions(-)
>
> diff --git a/cpu-common.h b/cpu-common.h
> index a40c57d..d047137 100644
> --- a/cpu-common.h
> +++ b/cpu-common.h
> @@ -71,6 +71,8 @@ void cpu_physical_memory_unmap(void *buffer,
> target_phys_addr_t len,
> void *cpu_register_map_client(void *opaque, void (*callback)(void *opaque));
> void cpu_unregister_map_client(void *cookie);
>
> +bool is_io_addr(target_phys_addr_t phys_addr);
Something like cpu_physical_memory_is_io would be more consistent with
other APIs around.
> +
> /* Coalesced MMIO regions are areas where write operations can be reordered.
> * This usually implies that write operations are side-effect free. This
> allows
> * batching which can make a major impact on performance when using
> diff --git a/exec.c b/exec.c
> index b81677a..edc5684 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -4435,3 +4435,19 @@ bool virtio_is_big_endian(void)
> #undef env
>
> #endif
> +
> +bool is_io_addr(target_phys_addr_t phys_addr)
> +{
> + ram_addr_t pd;
> + PhysPageDesc p;
> +
> + p = phys_page_find(phys_addr >> TARGET_PAGE_BITS);
> + pd = p.phys_offset;
> +
> + if (!is_ram_rom_romd(pd)) {
return !is_ram_rom_romd(pd); ?
> + /* I/O region */
> + return true;
> + }
> +
> + return false;
> +}
Jan
--
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