From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:47448) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S3PMY-0000ZY-Q7 for qemu-devel@nongnu.org; Fri, 02 Mar 2012 05:05:32 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S3PMP-0004ro-Vh for qemu-devel@nongnu.org; Fri, 02 Mar 2012 05:05:22 -0500 Received: from [222.73.24.84] (port=51564 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S3PMP-0004qb-LP for qemu-devel@nongnu.org; Fri, 02 Mar 2012 05:05:13 -0500 Message-ID: <4F509BA8.5070600@cn.fujitsu.com> Date: Fri, 02 Mar 2012 18:06:32 +0800 From: Wen Congyang MIME-Version: 1.0 References: <4F509A00.80207@cn.fujitsu.com> In-Reply-To: <4F509A00.80207@cn.fujitsu.com> Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Subject: [Qemu-devel] [RFC][PATCH 02/16 v8] Add API to check whether a physical address is I/O address List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel , Jan Kiszka , Dave Anderson , HATAYAMA Daisuke , Luiz Capitulino , Eric Blake This API will be used in the following patch. Signed-off-by: Wen Congyang --- cpu-common.h | 2 ++ exec.c | 11 +++++++++++ 2 files changed, 13 insertions(+), 0 deletions(-) diff --git a/cpu-common.h b/cpu-common.h index a40c57d..fde3e5d 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 cpu_physical_memory_is_io(target_phys_addr_t phys_addr); + /* 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..2114dd5 100644 --- a/exec.c +++ b/exec.c @@ -4435,3 +4435,14 @@ bool virtio_is_big_endian(void) #undef env #endif + +bool cpu_physical_memory_is_io(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; + + return !is_ram_rom_romd(pd); +} -- 1.7.1