LXR qemu/include/hw/virtio/virtio-mmio.h

   1/*
   2 * Virtio MMIO bindings
   3 *
   4 * Copyright (c) 2011 Linaro Limited
   5 *
   6 * Author:
   7 *  Peter Maydell <peter.maydell@linaro.org>
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License; either version 2
  11 * of the License, or (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License along
  19 * with this program; if not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22#ifndef HW_VIRTIO_MMIO_H
  23#define HW_VIRTIO_MMIO_H
  24
  25#include "hw/virtio/virtio-bus.h"
  26
  27/* QOM macros */
  28/* virtio-mmio-bus */
  29#define TYPE_VIRTIO_MMIO_BUS "virtio-mmio-bus"
  30#define VIRTIO_MMIO_BUS(obj) \
  31        OBJECT_CHECK(VirtioBusState, (obj), TYPE_VIRTIO_MMIO_BUS)
  32#define VIRTIO_MMIO_BUS_GET_CLASS(obj) \
  33        OBJECT_GET_CLASS(VirtioBusClass, (obj), TYPE_VIRTIO_MMIO_BUS)
  34#define VIRTIO_MMIO_BUS_CLASS(klass) \
  35        OBJECT_CLASS_CHECK(VirtioBusClass, (klass), TYPE_VIRTIO_MMIO_BUS)
  36
  37/* virtio-mmio */
  38#define TYPE_VIRTIO_MMIO "virtio-mmio"
  39#define VIRTIO_MMIO(obj) \
  40        OBJECT_CHECK(VirtIOMMIOProxy, (obj), TYPE_VIRTIO_MMIO)
  41
  42#define VIRT_MAGIC 0x74726976 /* 'virt' */
  43#define VIRT_VERSION 2
  44#define VIRT_VERSION_LEGACY 1
  45#define VIRT_VENDOR 0x554D4551 /* 'QEMU' */
  46
  47typedef struct VirtIOMMIOQueue {
  48    uint16_t num;
  49    bool enabled;
  50    uint32_t desc[2];
  51    uint32_t avail[2];
  52    uint32_t used[2];
  53} VirtIOMMIOQueue;
  54
  55typedef struct {
  56    /* Generic */
  57    SysBusDevice parent_obj;
  58    MemoryRegion iomem;
  59    qemu_irq irq;
  60    bool legacy;
  61    /* Guest accessible state needing migration and reset */
  62    uint32_t host_features_sel;
  63    uint32_t guest_features_sel;
  64    uint32_t guest_page_shift;
  65    /* virtio-bus */
  66    VirtioBusState bus;
  67    bool format_transport_address;
  68    /* Fields only used for non-legacy (v2) devices */
  69    uint32_t guest_features[2];
  70    VirtIOMMIOQueue vqs[VIRTIO_QUEUE_MAX];
  71} VirtIOMMIOProxy;
  72
  73#endif
  74