1 /*
2  * Copyright (c) 2014 Travis Geiselbrecht
3  *
4  * Use of this source code is governed by a MIT-style
5  * license that can be found in the LICENSE file or at
6  * https://opensource.org/licenses/MIT
7  */
8 #pragma once
9 
10 #include <lk/compiler.h>
11 #include <stdint.h>
12 
13 struct virtio_mmio_config {
14     /* 0x00 */  uint32_t magic;
15     uint32_t version;
16     uint32_t device_id;
17     uint32_t vendor_id;
18     /* 0x10 */  uint32_t host_features;
19     uint32_t host_features_sel;
20     uint32_t __reserved0[2];
21     /* 0x20 */  uint32_t guest_features;
22     uint32_t guest_features_sel;
23     uint32_t guest_page_size;
24     uint32_t __reserved1[1];
25     /* 0x30 */  uint32_t queue_sel;
26     uint32_t queue_num_max;
27     uint32_t queue_num;
28     uint32_t queue_align;
29     /* 0x40 */  uint32_t queue_pfn;
30     uint32_t __reserved2[3];
31     /* 0x50 */  uint32_t queue_notify;
32     uint32_t __reserved3[3];
33     /* 0x60 */  uint32_t interrupt_status;
34     uint32_t interrupt_ack;
35     uint32_t __reserved4[2];
36     /* 0x70 */  uint32_t status;
37     uint8_t __reserved5[0x8c];
38     /* 0x100 */ uint32_t config[0];
39 };
40 
41 STATIC_ASSERT(sizeof(struct virtio_mmio_config) == 0x100);
42 
43 #define VIRTIO_MMIO_MAGIC 0x74726976 // 'virt'
44 
45 #define VIRTIO_STATUS_ACKNOWLEDGE (1<<0)
46 #define VIRTIO_STATUS_DRIVER      (1<<1)
47 #define VIRTIO_STATUS_DRIVER_OK   (1<<2)
48 #define VIRTIO_STATUS_FEATURES_OK (1<<3)
49 #define VIRTIO_STATUS_DEVICE_NEEDS_RESET (1<<6)
50 #define VIRTIO_STATUS_FAILED      (1<<7)
51