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32#include "qemu/osdep.h"
33#include "qapi/error.h"
34#include "hw/hw.h"
35#include "hw/pci/pci.h"
36#include "trace.h"
37
38#define TYPE_XEN_PV_DEVICE "xen-pvdevice"
39
40#define XEN_PV_DEVICE(obj) \
41 OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE)
42
43typedef struct XenPVDevice {
44
45 PCIDevice parent_obj;
46
47 uint16_t vendor_id;
48 uint16_t device_id;
49 uint8_t revision;
50 uint32_t size;
51 MemoryRegion mmio;
52} XenPVDevice;
53
54static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,
55 unsigned size)
56{
57 trace_xen_pv_mmio_read(addr);
58
59 return ~(uint64_t)0;
60}
61
62static void xen_pv_mmio_write(void *opaque, hwaddr addr,
63 uint64_t val, unsigned size)
64{
65 trace_xen_pv_mmio_write(addr);
66}
67
68static const MemoryRegionOps xen_pv_mmio_ops = {
69 .read = &xen_pv_mmio_read,
70 .write = &xen_pv_mmio_write,
71 .endianness = DEVICE_LITTLE_ENDIAN,
72};
73
74static const VMStateDescription vmstate_xen_pvdevice = {
75 .name = "xen-pvdevice",
76 .version_id = 1,
77 .minimum_version_id = 1,
78 .fields = (VMStateField[]) {
79 VMSTATE_PCI_DEVICE(parent_obj, XenPVDevice),
80 VMSTATE_END_OF_LIST()
81 }
82};
83
84static void xen_pv_realize(PCIDevice *pci_dev, Error **errp)
85{
86 XenPVDevice *d = XEN_PV_DEVICE(pci_dev);
87 uint8_t *pci_conf;
88
89
90 if (d->device_id == 0xffff) {
91 error_setg(errp, "Device ID invalid, it must always be supplied");
92 return;
93 }
94
95 pci_conf = pci_dev->config;
96
97 pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);
98 pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);
99 pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);
100 pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);
101 pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);
102
103 pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);
104
105 pci_config_set_prog_interface(pci_conf, 0);
106
107 pci_conf[PCI_INTERRUPT_PIN] = 1;
108
109 memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,
110 "mmio", d->size);
111
112 pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,
113 &d->mmio);
114}
115
116static Property xen_pv_props[] = {
117 DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),
118 DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, 0xffff),
119 DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),
120 DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),
121 DEFINE_PROP_END_OF_LIST()
122};
123
124static void xen_pv_class_init(ObjectClass *klass, void *data)
125{
126 DeviceClass *dc = DEVICE_CLASS(klass);
127 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
128
129 k->realize = xen_pv_realize;
130 k->class_id = PCI_CLASS_SYSTEM_OTHER;
131 dc->desc = "Xen PV Device";
132 dc->props = xen_pv_props;
133 dc->vmsd = &vmstate_xen_pvdevice;
134}
135
136static const TypeInfo xen_pv_type_info = {
137 .name = TYPE_XEN_PV_DEVICE,
138 .parent = TYPE_PCI_DEVICE,
139 .instance_size = sizeof(XenPVDevice),
140 .class_init = xen_pv_class_init,
141 .interfaces = (InterfaceInfo[]) {
142 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
143 { },
144 },
145};
146
147static void xen_pv_register_types(void)
148{
149 type_register_static(&xen_pv_type_info);
150}
151
152type_init(xen_pv_register_types)
153