hw/sysbus: Add sysbus_mmio_get_region()

Add a sysbus_mmio_get_region() which allows users of sysbus
devices to turn a (SysBusDevice*, mmioidx) tuple into a
MemoryRegion*. This enables some useful simplifications of
devices which pass through another device's mmio region
(either directly or by implementing some kind of memory
controller device).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/hw/sysbus.c b/hw/sysbus.c
index f39768b..c365d39 100644
--- a/hw/sysbus.c
+++ b/hw/sysbus.c
@@ -131,6 +131,11 @@ void sysbus_init_mmio_region(SysBusDevice *dev, MemoryRegion *memory)
     dev->mmio[n].memory = memory;
 }
 
+MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
+{
+    return dev->mmio[n].memory;
+}
+
 void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
 {
     pio_addr_t i;