@@ -70,6 +70,8 @@ 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);
+
/* 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
@@ -4688,3 +4688,23 @@ void dump_exec_info(FILE *f, fprintf_function cpu_fprintf)
#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);
+ if (!p) {
+ pd = IO_MEM_UNASSIGNED;
+ } else {
+ pd = p->phys_offset;
+ }
+
+ if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM && !(pd & IO_MEM_ROMD)) {
+ /* I/O region */
+ return true;
+ }
+
+ return false;
+}
This API will be used in the following patch. Signed-off-by: Wen Congyang <wency@cn.fujitsu.com> --- cpu-common.h | 2 ++ exec.c | 20 ++++++++++++++++++++ 2 files changed, 22 insertions(+), 0 deletions(-)