| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2014 Travis Geiselbrecht |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining |
| 5 | * a copy of this software and associated documentation files |
| 6 | * (the "Software"), to deal in the Software without restriction, |
| 7 | * including without limitation the rights to use, copy, modify, merge, |
| 8 | * publish, distribute, sublicense, and/or sell copies of the Software, |
| 9 | * and to permit persons to whom the Software is furnished to do so, |
| 10 | * subject to the following conditions: |
| 11 | * |
| 12 | * The above copyright notice and this permission notice shall be |
| 13 | * included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 19 | * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 20 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 21 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 22 | */ |
| 23 | #pragma once |
| 24 | |
| 25 | #include <compiler.h> |
| 26 | #include <stdint.h> |
| 27 | |
| 28 | struct virtio_mmio_config { |
| 29 | /* 0x00 */ uint32_t magic; |
| 30 | uint32_t version; |
| 31 | uint32_t device_id; |
| 32 | uint32_t vendor_id; |
| 33 | /* 0x10 */ uint32_t host_features; |
| 34 | uint32_t host_features_sel; |
| 35 | uint32_t __reserved0[2]; |
| 36 | /* 0x20 */ uint32_t guest_features; |
| 37 | uint32_t guest_features_sel; |
| 38 | uint32_t guest_page_size; |
| 39 | uint32_t __reserved1[1]; |
| 40 | /* 0x30 */ uint32_t queue_sel; |
| 41 | uint32_t queue_num_max; |
| 42 | uint32_t queue_num; |
| 43 | uint32_t queue_align; |
| 44 | /* 0x40 */ uint32_t queue_pfn; |
| 45 | uint32_t __reserved2[3]; |
| 46 | /* 0x50 */ uint32_t queue_notify; |
| 47 | uint32_t __reserved3[3]; |
| 48 | /* 0x60 */ uint32_t interrupt_status; |
| 49 | uint32_t interrupt_ack; |
| 50 | uint32_t __reserved4[2]; |
| 51 | /* 0x70 */ uint32_t status; |
| 52 | uint8_t __reserved5[0x8c]; |
| 53 | /* 0x100 */ uint32_t config[0]; |
| 54 | }; |
| 55 | |
| 56 | STATIC_ASSERT(sizeof(struct virtio_mmio_config) == 0x100); |
| 57 | |
| 58 | #define VIRTIO_MMIO_MAGIC 0x74726976 // 'virt' |
| 59 | |
| 60 | #define VIRTIO_STATUS_ACKNOWLEDGE (1<<0) |
| 61 | #define VIRTIO_STATUS_DRIVER (1<<1) |
| 62 | #define VIRTIO_STATUS_DRIVER_OK (1<<2) |
| 63 | #define VIRTIO_STATUS_FEATURES_OK (1<<3) |
| 64 | #define VIRTIO_STATUS_DEVICE_NEEDS_RESET (1<<6) |
| 65 | #define VIRTIO_STATUS_FAILED (1<<7) |