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152 lines
4.9 KiB
152 lines
4.9 KiB
/* |
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* Virtio platform device driver |
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* |
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* Copyright 2011, ARM Ltd. |
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* |
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* Based on Virtio PCI driver by Anthony Liguori, copyright IBM Corp. 2007 |
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* |
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* This header is BSD licensed so anyone can use the definitions to implement |
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* compatible drivers/servers. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of IBM nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#ifndef _LINUX_VIRTIO_MMIO_H |
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#define _LINUX_VIRTIO_MMIO_H |
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/* |
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* Control registers |
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*/ |
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/* Magic value ("virt" string) - Read Only */ |
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#define VIRTIO_MMIO_MAGIC_VALUE 0x000 |
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/* Virtio device version - Read Only */ |
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#define VIRTIO_MMIO_VERSION 0x004 |
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/* Virtio device ID - Read Only */ |
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#define VIRTIO_MMIO_DEVICE_ID 0x008 |
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/* Virtio vendor ID - Read Only */ |
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#define VIRTIO_MMIO_VENDOR_ID 0x00c |
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/* Bitmask of the features supported by the device (host) |
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* (32 bits per set) - Read Only */ |
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#define VIRTIO_MMIO_DEVICE_FEATURES 0x010 |
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/* Device (host) features set selector - Write Only */ |
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#define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014 |
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/* Bitmask of features activated by the driver (guest) |
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* (32 bits per set) - Write Only */ |
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#define VIRTIO_MMIO_DRIVER_FEATURES 0x020 |
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/* Activated features set selector - Write Only */ |
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#define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024 |
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#ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */ |
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/* Guest's memory page size in bytes - Write Only */ |
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#define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028 |
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#endif |
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/* Queue selector - Write Only */ |
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#define VIRTIO_MMIO_QUEUE_SEL 0x030 |
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/* Maximum size of the currently selected queue - Read Only */ |
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#define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034 |
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/* Queue size for the currently selected queue - Write Only */ |
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#define VIRTIO_MMIO_QUEUE_NUM 0x038 |
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#ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */ |
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/* Used Ring alignment for the currently selected queue - Write Only */ |
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#define VIRTIO_MMIO_QUEUE_ALIGN 0x03c |
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/* Guest's PFN for the currently selected queue - Read Write */ |
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#define VIRTIO_MMIO_QUEUE_PFN 0x040 |
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#endif |
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/* Ready bit for the currently selected queue - Read Write */ |
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#define VIRTIO_MMIO_QUEUE_READY 0x044 |
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/* Queue notifier - Write Only */ |
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#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050 |
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/* Interrupt status - Read Only */ |
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#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060 |
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/* Interrupt acknowledge - Write Only */ |
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#define VIRTIO_MMIO_INTERRUPT_ACK 0x064 |
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/* Device status register - Read Write */ |
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#define VIRTIO_MMIO_STATUS 0x070 |
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/* Selected queue's Descriptor Table address, 64 bits in two halves */ |
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#define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080 |
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#define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084 |
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/* Selected queue's Available Ring address, 64 bits in two halves */ |
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#define VIRTIO_MMIO_QUEUE_AVAIL_LOW 0x090 |
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#define VIRTIO_MMIO_QUEUE_AVAIL_HIGH 0x094 |
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/* Selected queue's Used Ring address, 64 bits in two halves */ |
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#define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0 |
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#define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4 |
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/* Shared memory region id */ |
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#define VIRTIO_MMIO_SHM_SEL 0x0ac |
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/* Shared memory region length, 64 bits in two halves */ |
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#define VIRTIO_MMIO_SHM_LEN_LOW 0x0b0 |
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#define VIRTIO_MMIO_SHM_LEN_HIGH 0x0b4 |
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/* Shared memory region base address, 64 bits in two halves */ |
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#define VIRTIO_MMIO_SHM_BASE_LOW 0x0b8 |
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#define VIRTIO_MMIO_SHM_BASE_HIGH 0x0bc |
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/* Configuration atomicity value */ |
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#define VIRTIO_MMIO_CONFIG_GENERATION 0x0fc |
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/* The config space is defined by each driver as |
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* the per-driver configuration space - Read Write */ |
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#define VIRTIO_MMIO_CONFIG 0x100 |
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/* |
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* Interrupt flags (re: interrupt status & acknowledge registers) |
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*/ |
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#define VIRTIO_MMIO_INT_VRING (1 << 0) |
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#define VIRTIO_MMIO_INT_CONFIG (1 << 1) |
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#endif
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