| /* | |
| * 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 | |
| /* Shared memory region id */ | |
| #define VIRTIO_MMIO_SHM_SEL 0x0ac | |
| /* Shared memory region length, 64 bits in two halves */ | |
| #define VIRTIO_MMIO_SHM_LEN_LOW 0x0b0 | |
| #define VIRTIO_MMIO_SHM_LEN_HIGH 0x0b4 | |
| /* Shared memory region base address, 64 bits in two halves */ | |
| #define VIRTIO_MMIO_SHM_BASE_LOW 0x0b8 | |
| #define VIRTIO_MMIO_SHM_BASE_HIGH 0x0bc | |
| /* 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 |