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/*
* 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 host
* (32 bits per set) - Read Only */
#define VIRTIO_MMIO_HOST_FEATURES 0x010
/* Host features set selector - Write Only */
#define VIRTIO_MMIO_HOST_FEATURES_SEL 0x014
/* Bitmask of features activated by the guest
* (32 bits per set) - Write Only */
#define VIRTIO_MMIO_GUEST_FEATURES 0x020
/* Activated features set selector - Write Only */
#define VIRTIO_MMIO_GUEST_FEATURES_SEL 0x024
/* Guest's memory page size in bytes - Write Only */
#define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028
/* 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
/* 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
/* 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
/* 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