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qdev: rework device properties.

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This patch is a major overhaul of the device properties.  The properties
are saved directly in the device state struct now, the linked list of
property values is gone.

Advantages:
  * We don't have to maintain the list with the property values.
  * The value in the property list and the value actually used by
    the device can't go out of sync any more (used to happen for
    the pci.devfn == -1 case) because there is only one place where
    the value is stored.
  * A record describing the property is required now, you can't set
    random properties any more.

There are bus-specific and device-specific properties.  The former
should be used for properties common to all bus drivers.  Typical
use case is bus addressing, i.e. pci.devfn and i2c.address.

Properties have a PropertyInfo struct attached with name, size and
function pointers to parse and print properties.  A few common property
types have PropertyInfos defined in qdev-properties.c.  Drivers are free
to implement their own very special property parsers if needed.

Properties can have default values.  If unset they are zero-filled.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-07-15 13:43:31 +02:00 • committed by Anthony Liguori
parent f114784f69
commit ee6847d19b
47 changed files with 921 additions and 391 deletions
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22
hw/armv7m.c
View file

@ -127,7 +127,6 @@ static void bitband_init(SysBusDevice *dev)
BitBandState *s = FROM_SYSBUS(BitBandState, dev);
int iomemtype;
s->base = qdev_get_prop_int(&dev->qdev, "base", 0);
iomemtype = cpu_register_io_memory(bitband_readfn, bitband_writefn,
&s->base);
sysbus_init_mmio(dev, 0x02000000, iomemtype);
@ -138,12 +137,12 @@ static void armv7m_bitband_init(void)
DeviceState *dev;
dev = qdev_create(NULL, "ARM,bitband-memory");
qdev_set_prop_int(dev, "base", 0x20000000);
qdev_prop_set_uint32(dev, "base", 0x20000000);
qdev_init(dev);
sysbus_mmio_map(sysbus_from_qdev(dev), 0, 0x22000000);
dev = qdev_create(NULL, "ARM,bitband-memory");
qdev_set_prop_int(dev, "base", 0x40000000);
qdev_prop_set_uint32(dev, "base", 0x40000000);
qdev_init(dev);
sysbus_mmio_map(sysbus_from_qdev(dev), 0, 0x42000000);
}
@ -238,10 +237,23 @@ qemu_irq *armv7m_init(int flash_size, int sram_size,
return pic;
}
static SysBusDeviceInfo bitband_info = {
.init = bitband_init,
.qdev.name = "ARM,bitband-memory",
.qdev.size = sizeof(BitBandState),
.qdev.props = (Property[]) {
{
.name = "base",
.info = &qdev_prop_hex32,
.offset = offsetof(BitBandState, base),
},
{/* end of list */}
}
};
static void armv7m_register_devices(void)
{
sysbus_register_dev("ARM,bitband-memory", sizeof(BitBandState),
bitband_init);
sysbus_register_withprop(&bitband_info);
}
device_init(armv7m_register_devices)