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 #define VIRTIO_MMIO_BUS(obj) \ 32 OBJECT_CHECK(VirtioBusState, (obj), TYPE_VIRTIO_MMIO_BUS) 33 #define VIRTIO_MMIO_BUS_GET_CLASS(obj) \ 34 OBJECT_GET_CLASS(VirtioBusClass, (obj), TYPE_VIRTIO_MMIO_BUS) 35 #define VIRTIO_MMIO_BUS_CLASS(klass) \ 36 OBJECT_CLASS_CHECK(VirtioBusClass, (klass), TYPE_VIRTIO_MMIO_BUS) 37 38 /* virtio-mmio */ 39 #define TYPE_VIRTIO_MMIO "virtio-mmio" 40 typedef struct VirtIOMMIOProxy VirtIOMMIOProxy; 41 DECLARE_INSTANCE_CHECKER(VirtIOMMIOProxy, VIRTIO_MMIO, 42 TYPE_VIRTIO_MMIO) 43 44 #define VIRT_MAGIC 0x74726976 /* 'virt' */ 45 #define VIRT_VERSION 2 46 #define VIRT_VERSION_LEGACY 1 47 #define VIRT_VENDOR 0x554D4551 /* 'QEMU' */ 48 49 typedef struct VirtIOMMIOQueue { 50 uint16_t num; 51 bool enabled; 52 uint32_t desc[2]; 53 uint32_t avail[2]; 54 uint32_t used[2]; 55 } VirtIOMMIOQueue; 56 57 struct VirtIOMMIOProxy { 58 /* Generic */ 59 SysBusDevice parent_obj; 60 MemoryRegion iomem; 61 qemu_irq irq; 62 bool legacy; 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 76