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Add API to check whether a physical address is I/O address

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This API will be used in the following patch.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
Wen Congyang 2012-05-07 12:04:18 +08:00 committed by Luiz Capitulino
parent 80167a8a31
commit 76f3553883
2 changed files with 16 additions and 0 deletions
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4
cpu-common.h
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@ -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

12
exec.c
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@ -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