Archipelago » qemu

/* Copyright (c) Citrix Systems Inc.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms,

 * with or without modification, are permitted provided

 * that the following conditions are met:

 *

 * *   Redistributions of source code must retain the above

 *     copyright notice, this list of conditions and the

 *     following disclaimer.

 * *   Redistributions in binary form must reproduce the above

 *     copyright notice, this list of conditions and the

 *     following disclaimer in the documentation and/or other

 *     materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND

 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,

 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

 * SUCH DAMAGE.

 */

#include "hw/hw.h"

#include "hw/pci/pci.h"

#include "trace.h"

#define TYPE_XEN_PV_DEVICE  "xen-pvdevice"

#define XEN_PV_DEVICE(obj) \

     OBJECT_CHECK(XenPVDevice, (obj), TYPE_XEN_PV_DEVICE)

typedef struct XenPVDevice {

    /*< private >*/

    PCIDevice       parent_obj;

    /*< public >*/

    uint16_t        vendor_id;

    uint16_t        device_id;

    uint8_t         revision;

    uint32_t        size;

    MemoryRegion    mmio;

} XenPVDevice;

static uint64_t xen_pv_mmio_read(void *opaque, hwaddr addr,

                                 unsigned size)

{

    trace_xen_pv_mmio_read(addr);

    return ~(uint64_t)0;

}

static void xen_pv_mmio_write(void *opaque, hwaddr addr,

                              uint64_t val, unsigned size)

{

    trace_xen_pv_mmio_write(addr);

}

static const MemoryRegionOps xen_pv_mmio_ops = {

    .read = &xen_pv_mmio_read,

    .write = &xen_pv_mmio_write,

    .endianness = DEVICE_LITTLE_ENDIAN,

};

static int xen_pv_init(PCIDevice *pci_dev)

{

    XenPVDevice *d = XEN_PV_DEVICE(pci_dev);

    uint8_t *pci_conf;

    pci_conf = pci_dev->config;

    pci_set_word(pci_conf + PCI_VENDOR_ID, d->vendor_id);

    pci_set_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID, d->vendor_id);

    pci_set_word(pci_conf + PCI_DEVICE_ID, d->device_id);

    pci_set_word(pci_conf + PCI_SUBSYSTEM_ID, d->device_id);

    pci_set_byte(pci_conf + PCI_REVISION_ID, d->revision);

    pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_MEMORY);

    pci_config_set_prog_interface(pci_conf, 0);

    pci_conf[PCI_INTERRUPT_PIN] = 1;

    memory_region_init_io(&d->mmio, NULL, &xen_pv_mmio_ops, d,

                          "mmio", d->size);

    pci_register_bar(pci_dev, 1, PCI_BASE_ADDRESS_MEM_PREFETCH,

                     &d->mmio);

    return 0;

}

static Property xen_pv_props[] = {

    DEFINE_PROP_UINT16("vendor-id", XenPVDevice, vendor_id, PCI_VENDOR_ID_XEN),

    DEFINE_PROP_UINT16("device-id", XenPVDevice, device_id, PCI_DEVICE_ID_XEN_PVDEVICE),

    DEFINE_PROP_UINT8("revision", XenPVDevice, revision, 0x01),

    DEFINE_PROP_UINT32("size", XenPVDevice, size, 0x400000),

    DEFINE_PROP_END_OF_LIST()

};

static void xen_pv_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);

    k->init = xen_pv_init;

    k->class_id = PCI_CLASS_SYSTEM_OTHER;

    dc->desc = "Xen PV Device";

    dc->props = xen_pv_props;

}

static const TypeInfo xen_pv_type_info = {

    .name          = TYPE_XEN_PV_DEVICE,

    .parent        = TYPE_PCI_DEVICE,

    .instance_size = sizeof(XenPVDevice),

    .class_init    = xen_pv_class_init,

};

static void xen_pv_register_types(void)

{

    type_register_static(&xen_pv_type_info);

}

type_init(xen_pv_register_types)