From 76f3553883b868e99c78212b9d12309e8e1e5d81 Mon Sep 17 00:00:00 2001 From: Wen Congyang Date: Mon, 7 May 2012 12:04:18 +0800 Subject: [PATCH] Add API to check whether a physical address is I/O address This API will be used in the following patch. Signed-off-by: Wen Congyang Signed-off-by: Luiz Capitulino --- cpu-common.h | 4 ++++ exec.c | 12 ++++++++++++ 2 files changed, 16 insertions(+) diff --git a/cpu-common.h b/cpu-common.h index dca5175..1fe3280 100644 --- a/cpu-common.h +++ b/cpu-common.h @@ -71,6 +71,10 @@ 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); +#ifndef CONFIG_USER_ONLY +bool cpu_physical_memory_is_io(target_phys_addr_t phys_addr); +#endif + /* 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 a0494c7..1b65859 100644 --- a/exec.c +++ b/exec.c @@ -4336,3 +4336,15 @@ bool virtio_is_big_endian(void) } #endif + +#ifndef CONFIG_USER_ONLY +bool cpu_physical_memory_is_io(target_phys_addr_t phys_addr) +{ + MemoryRegionSection *section; + + section = phys_page_find(phys_addr >> TARGET_PAGE_BITS); + + return !(memory_region_is_ram(section->mr) || + memory_region_is_romd(section->mr)); +} +#endif -- 2.7.4