qemu

FORK: QEMU emulator
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virtio-mmio.h (2195B)

      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 #define VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD_BIT 1
     53 #define VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD \
     54         (1 << VIRTIO_IOMMIO_FLAG_USE_IOEVENTFD_BIT)
     55 
     56 struct VirtIOMMIOProxy {
     57     /* Generic */
     58     SysBusDevice parent_obj;
     59     MemoryRegion iomem;
     60     qemu_irq irq;
     61     bool legacy;
     62     uint32_t flags;
     63     /* Guest accessible state needing migration and reset */
     64     uint32_t host_features_sel;
     65     uint32_t guest_features_sel;
     66     uint32_t guest_page_shift;
     67     /* virtio-bus */
     68     VirtioBusState bus;
     69     bool format_transport_address;
     70     /* Fields only used for non-legacy (v2) devices */
     71     uint32_t guest_features[2];
     72     VirtIOMMIOQueue vqs[VIRTIO_QUEUE_MAX];
     73 };
     74 
     75 #endif