| /* |
| * Virtio platform device driver |
| * |
| * Copyright 2011, ARM Ltd. |
| * |
| * Based on Virtio PCI driver by Anthony Liguori, copyright IBM Corp. 2007 |
| * |
| * This header is BSD licensed so anyone can use the definitions to implement |
| * compatible drivers/servers. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of IBM nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #ifndef _LINUX_VIRTIO_MMIO_H |
| #define _LINUX_VIRTIO_MMIO_H |
| |
| /* |
| * Control registers |
| */ |
| |
| /* Magic value ("virt" string) - Read Only */ |
| #define VIRTIO_MMIO_MAGIC_VALUE 0x000 |
| |
| /* Virtio device version - Read Only */ |
| #define VIRTIO_MMIO_VERSION 0x004 |
| |
| /* Virtio device ID - Read Only */ |
| #define VIRTIO_MMIO_DEVICE_ID 0x008 |
| |
| /* Virtio vendor ID - Read Only */ |
| #define VIRTIO_MMIO_VENDOR_ID 0x00c |
| |
| /* Bitmask of the features supported by the device (host) |
| * (32 bits per set) - Read Only */ |
| #define VIRTIO_MMIO_DEVICE_FEATURES 0x010 |
| |
| /* Device (host) features set selector - Write Only */ |
| #define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014 |
| |
| /* Bitmask of features activated by the driver (guest) |
| * (32 bits per set) - Write Only */ |
| #define VIRTIO_MMIO_DRIVER_FEATURES 0x020 |
| |
| /* Activated features set selector - Write Only */ |
| #define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024 |
| |
| |
| #ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */ |
| |
| /* Guest's memory page size in bytes - Write Only */ |
| #define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028 |
| |
| #endif |
| |
| |
| /* Queue selector - Write Only */ |
| #define VIRTIO_MMIO_QUEUE_SEL 0x030 |
| |
| /* Maximum size of the currently selected queue - Read Only */ |
| #define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034 |
| |
| /* Queue size for the currently selected queue - Write Only */ |
| #define VIRTIO_MMIO_QUEUE_NUM 0x038 |
| |
| |
| #ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */ |
| |
| /* Used Ring alignment for the currently selected queue - Write Only */ |
| #define VIRTIO_MMIO_QUEUE_ALIGN 0x03c |
| |
| /* Guest's PFN for the currently selected queue - Read Write */ |
| #define VIRTIO_MMIO_QUEUE_PFN 0x040 |
| |
| #endif |
| |
| |
| /* Ready bit for the currently selected queue - Read Write */ |
| #define VIRTIO_MMIO_QUEUE_READY 0x044 |
| |
| /* Queue notifier - Write Only */ |
| #define VIRTIO_MMIO_QUEUE_NOTIFY 0x050 |
| |
| /* Interrupt status - Read Only */ |
| #define VIRTIO_MMIO_INTERRUPT_STATUS 0x060 |
| |
| /* Interrupt acknowledge - Write Only */ |
| #define VIRTIO_MMIO_INTERRUPT_ACK 0x064 |
| |
| /* Device status register - Read Write */ |
| #define VIRTIO_MMIO_STATUS 0x070 |
| |
| /* Selected queue's Descriptor Table address, 64 bits in two halves */ |
| #define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080 |
| #define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084 |
| |
| /* Selected queue's Available Ring address, 64 bits in two halves */ |
| #define VIRTIO_MMIO_QUEUE_AVAIL_LOW 0x090 |
| #define VIRTIO_MMIO_QUEUE_AVAIL_HIGH 0x094 |
| |
| /* Selected queue's Used Ring address, 64 bits in two halves */ |
| #define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0 |
| #define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4 |
| |
| /* Configuration atomicity value */ |
| #define VIRTIO_MMIO_CONFIG_GENERATION 0x0fc |
| |
| /* The config space is defined by each driver as |
| * the per-driver configuration space - Read Write */ |
| #define VIRTIO_MMIO_CONFIG 0x100 |
| |
| |
| |
| /* |
| * Interrupt flags (re: interrupt status & acknowledge registers) |
| */ |
| |
| #define VIRTIO_MMIO_INT_VRING (1 << 0) |
| #define VIRTIO_MMIO_INT_CONFIG (1 << 1) |
| |
| #endif |
