| Pawel Moll | edfd52e | 2011-10-24 14:07:03 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Virtio platform device driver |
| 3 | * |
| 4 | * Copyright 2011, ARM Ltd. |
| 5 | * |
| 6 | * Based on Virtio PCI driver by Anthony Liguori, copyright IBM Corp. 2007 |
| 7 | * |
| 8 | * This header is BSD licensed so anyone can use the definitions to implement |
| 9 | * compatible drivers/servers. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of IBM nor the names of its contributors |
| 20 | * may be used to endorse or promote products derived from this software |
| 21 | * without specific prior written permission. |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | */ |
| 34 | |
| 35 | #ifndef _LINUX_VIRTIO_MMIO_H |
| 36 | #define _LINUX_VIRTIO_MMIO_H |
| 37 | |
| 38 | /* |
| 39 | * Control registers |
| 40 | */ |
| 41 | |
| 42 | /* Magic value ("virt" string) - Read Only */ |
| 43 | #define VIRTIO_MMIO_MAGIC_VALUE 0x000 |
| 44 | |
| 45 | /* Virtio device version - Read Only */ |
| 46 | #define VIRTIO_MMIO_VERSION 0x004 |
| 47 | |
| 48 | /* Virtio device ID - Read Only */ |
| 49 | #define VIRTIO_MMIO_DEVICE_ID 0x008 |
| 50 | |
| 51 | /* Virtio vendor ID - Read Only */ |
| 52 | #define VIRTIO_MMIO_VENDOR_ID 0x00c |
| 53 | |
| 54 | /* Bitmask of the features supported by the host |
| 55 | * (32 bits per set) - Read Only */ |
| 56 | #define VIRTIO_MMIO_HOST_FEATURES 0x010 |
| 57 | |
| 58 | /* Host features set selector - Write Only */ |
| 59 | #define VIRTIO_MMIO_HOST_FEATURES_SEL 0x014 |
| 60 | |
| 61 | /* Bitmask of features activated by the guest |
| 62 | * (32 bits per set) - Write Only */ |
| 63 | #define VIRTIO_MMIO_GUEST_FEATURES 0x020 |
| 64 | |
| 65 | /* Activated features set selector - Write Only */ |
| Sasha Levin | fe1a7fe | 2011-11-15 16:17:18 +0200 | [diff] [blame] | 66 | #define VIRTIO_MMIO_GUEST_FEATURES_SEL 0x024 |
| Pawel Moll | edfd52e | 2011-10-24 14:07:03 +0100 | [diff] [blame] | 67 | |
| 68 | /* Guest's memory page size in bytes - Write Only */ |
| 69 | #define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028 |
| 70 | |
| 71 | /* Queue selector - Write Only */ |
| 72 | #define VIRTIO_MMIO_QUEUE_SEL 0x030 |
| 73 | |
| 74 | /* Maximum size of the currently selected queue - Read Only */ |
| 75 | #define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034 |
| 76 | |
| 77 | /* Queue size for the currently selected queue - Write Only */ |
| 78 | #define VIRTIO_MMIO_QUEUE_NUM 0x038 |
| 79 | |
| 80 | /* Used Ring alignment for the currently selected queue - Write Only */ |
| 81 | #define VIRTIO_MMIO_QUEUE_ALIGN 0x03c |
| 82 | |
| 83 | /* Guest's PFN for the currently selected queue - Read Write */ |
| 84 | #define VIRTIO_MMIO_QUEUE_PFN 0x040 |
| 85 | |
| 86 | /* Queue notifier - Write Only */ |
| 87 | #define VIRTIO_MMIO_QUEUE_NOTIFY 0x050 |
| 88 | |
| 89 | /* Interrupt status - Read Only */ |
| 90 | #define VIRTIO_MMIO_INTERRUPT_STATUS 0x060 |
| 91 | |
| 92 | /* Interrupt acknowledge - Write Only */ |
| 93 | #define VIRTIO_MMIO_INTERRUPT_ACK 0x064 |
| 94 | |
| 95 | /* Device status register - Read Write */ |
| 96 | #define VIRTIO_MMIO_STATUS 0x070 |
| 97 | |
| 98 | /* The config space is defined by each driver as |
| 99 | * the per-driver configuration space - Read Write */ |
| 100 | #define VIRTIO_MMIO_CONFIG 0x100 |
| 101 | |
| 102 | |
| 103 | |
| 104 | /* |
| 105 | * Interrupt flags (re: interrupt status & acknowledge registers) |
| 106 | */ |
| 107 | |
| 108 | #define VIRTIO_MMIO_INT_VRING (1 << 0) |
| 109 | #define VIRTIO_MMIO_INT_CONFIG (1 << 1) |
| 110 | |
| 111 | #endif |