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hw/sysbus: Add sysbus_mmio_get_region()

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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>
This commit is contained in:
Peter Maydell 2011-08-28 16:22:17 +00:00
parent 9f94778c16
commit 46c305ef6b
2 changed files with 6 additions and 0 deletions
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5
hw/sysbus.c
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@ -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;

1
hw/sysbus.h
View File

@ -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);