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[v2,01/18] hw/sysbus: Add sysbus_mmio_get_region()

Message ID 1314550628-26869-3-git-send-email-peter.maydell@linaro.org
State New
Headers show

Commit Message

Peter Maydell Aug. 28, 2011, 4:56 p.m. UTC 
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>
---
 hw/sysbus.c |    5 +++++
 hw/sysbus.h |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)
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Patch

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;
diff --git a/hw/sysbus.h b/hw/sysbus.h
index b87c6c5..aa3d383 100644
--- a/hw/sysbus.h
+++ b/hw/sysbus.h
@@ -50,6 +50,7 @@  void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size,
 void sysbus_init_mmio_cb2(SysBusDevice *dev,
                           mmio_mapfunc cb, mmio_mapfunc unmap);
 void sysbus_init_mmio_region(SysBusDevice *dev, MemoryRegion *memory);
+MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n);
 void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
 void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target);
 void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size);