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✏️ virtio_mmio.h
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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 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
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