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1 | /* |
2 | * Virtio platform device driver | |
3 | * | |
4 | * Copyright 2011, ARM Ltd. | |
5 | * | |
6 | * Based on Virtio PCI driver by Anthony Liguori, copyright IBM Corp. 2007 | |
7 | * | |
8 | * This header is BSD licensed so anyone can use the definitions to implement | |
9 | * compatible drivers/servers. | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of IBM nor the names of its contributors | |
20 | * may be used to endorse or promote products derived from this software | |
21 | * without specific prior written permission. | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND | |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE | |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
32 | * SUCH DAMAGE. | |
33 | */ | |
34 | ||
35 | #ifndef _LINUX_VIRTIO_MMIO_H | |
36 | #define _LINUX_VIRTIO_MMIO_H | |
37 | ||
38 | /* | |
39 | * Control registers | |
40 | */ | |
41 | ||
42 | /* Magic value ("virt" string) - Read Only */ | |
43 | #define VIRTIO_MMIO_MAGIC_VALUE 0x000 | |
44 | ||
45 | /* Virtio device version - Read Only */ | |
46 | #define VIRTIO_MMIO_VERSION 0x004 | |
47 | ||
48 | /* Virtio device ID - Read Only */ | |
49 | #define VIRTIO_MMIO_DEVICE_ID 0x008 | |
50 | ||
51 | /* Virtio vendor ID - Read Only */ | |
52 | #define VIRTIO_MMIO_VENDOR_ID 0x00c | |
53 | ||
54 | /* Bitmask of the features supported by the host | |
55 | * (32 bits per set) - Read Only */ | |
56 | #define VIRTIO_MMIO_HOST_FEATURES 0x010 | |
57 | ||
58 | /* Host features set selector - Write Only */ | |
59 | #define VIRTIO_MMIO_HOST_FEATURES_SEL 0x014 | |
60 | ||
61 | /* Bitmask of features activated by the guest | |
62 | * (32 bits per set) - Write Only */ | |
63 | #define VIRTIO_MMIO_GUEST_FEATURES 0x020 | |
64 | ||
65 | /* Activated features set selector - Write Only */ | |
fe1a7fe2 | 66 | #define VIRTIO_MMIO_GUEST_FEATURES_SEL 0x024 |
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67 | |
68 | /* Guest's memory page size in bytes - Write Only */ | |
69 | #define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028 | |
70 | ||
71 | /* Queue selector - Write Only */ | |
72 | #define VIRTIO_MMIO_QUEUE_SEL 0x030 | |
73 | ||
74 | /* Maximum size of the currently selected queue - Read Only */ | |
75 | #define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034 | |
76 | ||
77 | /* Queue size for the currently selected queue - Write Only */ | |
78 | #define VIRTIO_MMIO_QUEUE_NUM 0x038 | |
79 | ||
80 | /* Used Ring alignment for the currently selected queue - Write Only */ | |
81 | #define VIRTIO_MMIO_QUEUE_ALIGN 0x03c | |
82 | ||
83 | /* Guest's PFN for the currently selected queue - Read Write */ | |
84 | #define VIRTIO_MMIO_QUEUE_PFN 0x040 | |
85 | ||
86 | /* Queue notifier - Write Only */ | |
87 | #define VIRTIO_MMIO_QUEUE_NOTIFY 0x050 | |
88 | ||
89 | /* Interrupt status - Read Only */ | |
90 | #define VIRTIO_MMIO_INTERRUPT_STATUS 0x060 | |
91 | ||
92 | /* Interrupt acknowledge - Write Only */ | |
93 | #define VIRTIO_MMIO_INTERRUPT_ACK 0x064 | |
94 | ||
95 | /* Device status register - Read Write */ | |
96 | #define VIRTIO_MMIO_STATUS 0x070 | |
97 | ||
98 | /* The config space is defined by each driver as | |
99 | * the per-driver configuration space - Read Write */ | |
100 | #define VIRTIO_MMIO_CONFIG 0x100 | |
101 | ||
102 | ||
103 | ||
104 | /* | |
105 | * Interrupt flags (re: interrupt status & acknowledge registers) | |
106 | */ | |
107 | ||
108 | #define VIRTIO_MMIO_INT_VRING (1 << 0) | |
109 | #define VIRTIO_MMIO_INT_CONFIG (1 << 1) | |
110 | ||
111 | #endif |