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pci_host: Turn into SysBus-derived QOM type 

The preceding commits fixed misuses of FROM_SYSBUS() that led people to
add a bogus busdev field. For qdev the field order was less relevant but
for QOM the PCIHostState field (including the SysBusDevice actually
initialized with a value) must be placed first within the state struct.

To facilitate accessing the PCIHostState fields, derive all PCI host
bridges from TYPE_PCI_HOST_BRIDGE rather than TYPE_SYS_BUS_DEVICE.

We can now access PCIHostState QOM-style, with PCI_HOST_BRIDGE() macro.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Andreas Färber 2012-08-20 19:08:07 +02:00 committed by Anthony Liguori
parent 57fd7b7fce
commit b44ff9d430
2 changed files with 17 additions and 0 deletions
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12
hw/pci_host.c
View File

@ -165,4 +165,16 @@ const MemoryRegionOps pci_host_data_be_ops = {
.endianness = DEVICE_BIG_ENDIAN,
};
static const TypeInfo pci_host_type_info = {
.name = TYPE_PCI_HOST_BRIDGE,
.parent = TYPE_SYS_BUS_DEVICE,
.abstract = true,
.instance_size = sizeof(PCIHostState),
};
static void pci_host_register_types(void)
{
type_register_static(&pci_host_type_info);
}
type_init(pci_host_register_types)

5
hw/pci_host.h
View File

@ -30,8 +30,13 @@
#include "sysbus.h"
#define TYPE_PCI_HOST_BRIDGE "pci-host-bridge"
#define PCI_HOST_BRIDGE(obj) \
OBJECT_CHECK(PCIHostState, (obj), TYPE_PCI_HOST_BRIDGE)
struct PCIHostState {
SysBusDevice busdev;
MemoryRegion conf_mem;
MemoryRegion data_mem;
MemoryRegion mmcfg;