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/sysbus.h" 26 #include "hw/virtio/virtio-bus.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 76