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 #include "qom/object.h"
  27
  28 /* QOM macros */
  29 /* virtio-mmio-bus */
  30 #define TYPE_VIRTIO_MMIO_BUS "virtio-mmio-bus"
  31 /* This is reusing the VirtioBusState typedef from TYPE_VIRTIO_BUS */
  32 DECLARE_OBJ_CHECKERS(VirtioBusState, VirtioBusClass,
  33                      VIRTIO_MMIO_BUS, TYPE_VIRTIO_MMIO_BUS)
  34
  35 /* virtio-mmio */
  36 #define TYPE_VIRTIO_MMIO "virtio-mmio"
  37 OBJECT_DECLARE_SIMPLE_TYPE(VirtIOMMIOProxy, VIRTIO_MMIO)
  38
  39 #define VIRT_MAGIC 0x74726976 /* 'virt' */
  40 #define VIRT_VERSION 2
  41 #define VIRT_VERSION_LEGACY 1
  42 #define VIRT_VENDOR 0x554D4551 /* 'QEMU' */
  43
  44 typedef struct VirtIOMMIOQueue {
  45     uint16_t num;
  46     bool enabled;
  47     uint32_t desc[2];
  48     uint32_t avail[2];
  49     uint32_t used[2];
  50 } VirtIOMMIOQueue;
  51
  52 struct VirtIOMMIOProxy {
  53     /* Generic */
  54     SysBusDevice parent_obj;
  55     MemoryRegion iomem;
  56     qemu_irq irq;
  57     bool legacy;
  58     /* Guest accessible state needing migration and reset */
  59     uint32_t host_features_sel;
  60     uint32_t guest_features_sel;
  61     uint32_t guest_page_shift;
  62     /* virtio-bus */
  63     VirtioBusState bus;
  64     bool format_transport_address;
  65     /* Fields only used for non-legacy (v2) devices */
  66     uint32_t guest_features[2];
  67     VirtIOMMIOQueue vqs[VIRTIO_QUEUE_MAX];
  68 };
  69
  70 #endif