[RFC v5 31/86] Integrate I/O memory regions into qemu

Avi Kivity
2011-07-20T16:50:50Z

get_system_io() returns the root I/O memory region.

Signed-off-by: Avi Kivity <avi@redhat.com>
---
exec-memory.h | 2 ++
exec.c | 10 ++++++++++
2 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/exec-memory.h b/exec-memory.h
index aad21b5..3acb15f 100644
--- a/exec-memory.h
+++ b/exec-memory.h
@@ -15,6 +15,8 @@
*/
MemoryRegion *get_system_memory(void);

+MemoryRegion *get_system_io(void);
+
/* Set the root memory region. This region is the system memory map. */
void set_system_memory_map(MemoryRegion *mr);

diff --git a/exec.c b/exec.c
index 2bbd14c..81fd6f4 100644
--- a/exec.c
+++ b/exec.c
@@ -113,6 +113,7 @@ static int in_migration;
RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list) };

static MemoryRegion *system_memory;
+static MemoryRegion *system_io;

#endif

@@ -3819,6 +3820,10 @@ static void memory_map_init(void)
system_memory = qemu_malloc(sizeof(*system_memory));
memory_region_init(system_memory, "system", UINT64_MAX);
set_system_memory_map(system_memory);
+
+ system_io = qemu_malloc(sizeof(*system_io));
+ memory_region_init(system_memory, "io", 65536);
+ set_system_io_map(system_io);
}

MemoryRegion *get_system_memory(void)
@@ -3826,6 +3831,11 @@ MemoryRegion *get_system_memory(void)
return system_memory;
}

+MemoryRegion *get_system_io(void)
+{
+ return system_io;
+}
+
#endif /* !defined(CONFIG_USER_ONLY) */

/* physical memory access (slow version, mainly for debug) */
--
1.7.5.3