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sysbus: Expose MMIO enumeration helper

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Sysbus devices have a range of MMIO regions they expose. The exact number
of regions is device specific and internal information to the device model.

Expose whether a region exists via a public interface. That way our platform
bus enumeration code can dynamically determine how many regions exist.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2014-09-24 12:36:30 +02:00
parent b797318666
commit 471a9bc144
2 changed files with 7 additions and 0 deletions
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6
hw/core/sysbus.c
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@ -110,6 +110,12 @@ void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq);
}
/* Check whether an MMIO region exists */
bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n)
{
return (n < dev->num_mmio);
}
static void sysbus_mmio_map_common(SysBusDevice *dev, int n, hwaddr addr,
bool may_overlap, int priority)
{

1
include/hw/sysbus.h
View File

@ -67,6 +67,7 @@ void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size);
bool sysbus_has_irq(SysBusDevice *dev, int n);
bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n);
void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
bool sysbus_is_irq_connected(SysBusDevice *dev, int n);
qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n);