1 /* $OpenBSD: agpio.h,v 1.1 2002/07/12 20:17:03 mickey Exp $ */
2
3 /*-
4 * Copyright (c) 2000 Doug Rabson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/sys/sys/agpio.h,v 1.1 2000/06/09 16:04:30 dfr Exp $
29 */
30
31 #ifndef _SYS_AGPIO_H_
32 #define _SYS_AGPIO_H_
33
34 #define AGP_DEVICE "/dev/ttyC0"
35
36 /*
37 * The AGP gatt uses 4k pages irrespective of the host page size.
38 */
39 #define AGP_PAGE_SIZE 4096
40 #define AGP_PAGE_SHIFT 12
41
42 /*
43 * Macros to manipulate AGP mode words.
44 */
45 #define AGP_MODE_GET_RQ(x) (((x) & 0xff000000U) >> 24)
46 #define AGP_MODE_GET_SBA(x) (((x) & 0x00000200U) >> 9)
47 #define AGP_MODE_GET_AGP(x) (((x) & 0x00000100U) >> 8)
48 #define AGP_MODE_GET_4G(x) (((x) & 0x00000020U) >> 5)
49 #define AGP_MODE_GET_FW(x) (((x) & 0x00000010U) >> 4)
50 #define AGP_MODE_GET_RATE(x) ((x) & 0x00000003U)
51 #define AGP_MODE_SET_RQ(x,v) (((x) & ~0xff000000U) | ((v) << 24))
52 #define AGP_MODE_SET_SBA(x,v) (((x) & ~0x00000200U) | ((v) << 9))
53 #define AGP_MODE_SET_AGP(x,v) (((x) & ~0x00000100U) | ((v) << 8))
54 #define AGP_MODE_SET_4G(x,v) (((x) & ~0x00000020U) | ((v) << 5))
55 #define AGP_MODE_SET_FW(x,v) (((x) & ~0x00000010U) | ((v) << 4))
56 #define AGP_MODE_SET_RATE(x,v) (((x) & ~0x00000003U) | (v))
57 #define AGP_MODE_RATE_1x 0x00000001
58 #define AGP_MODE_RATE_2x 0x00000002
59 #define AGP_MODE_RATE_4x 0x00000004
60
61 #define AGPIOC_BASE 'A'
62 #define AGPIOC_INFO _IOR (AGPIOC_BASE, 0, agp_info)
63 #define AGPIOC_ACQUIRE _IO (AGPIOC_BASE, 1)
64 #define AGPIOC_RELEASE _IO (AGPIOC_BASE, 2)
65 #define AGPIOC_SETUP _IOW (AGPIOC_BASE, 3, agp_setup)
66 #if 0
67 #define AGPIOC_RESERVE _IOW (AGPIOC_BASE, 4, agp_region)
68 #define AGPIOC_PROTECT _IOW (AGPIOC_BASE, 5, agp_region)
69 #endif
70 #define AGPIOC_ALLOCATE _IOWR(AGPIOC_BASE, 6, agp_allocate)
71 #define AGPIOC_DEALLOCATE _IOW (AGPIOC_BASE, 7, int)
72 #define AGPIOC_BIND _IOW (AGPIOC_BASE, 8, agp_bind)
73 #define AGPIOC_UNBIND _IOW (AGPIOC_BASE, 9, agp_unbind)
74
75 typedef struct _agp_version {
76 u_int16_t major;
77 u_int16_t minor;
78 } agp_version;
79
80 typedef struct _agp_info {
81 agp_version version; /* version of the driver */
82 u_int32_t bridge_id; /* bridge vendor/device */
83 u_int32_t agp_mode; /* mode info of bridge */
84 off_t aper_base; /* base of aperture */
85 size_t aper_size; /* size of aperture */
86 size_t pg_total; /* max pages (swap + system) */
87 size_t pg_system; /* max pages (system) */
88 size_t pg_used; /* current pages used */
89 } agp_info;
90
91 typedef struct _agp_setup {
92 u_int32_t agp_mode; /* mode info of bridge */
93 } agp_setup;
94
95 #if 0
96 /*
97 * The "prot" down below needs still a "sleep" flag somehow ...
98 */
99 typedef struct _agp_segment {
100 off_t pg_start; /* starting page to populate */
101 size_t pg_count; /* number of pages */
102 int prot; /* prot flags for mmap */
103 } agp_segment;
104
105 typedef struct _agp_region {
106 pid_t pid; /* pid of process */
107 size_t seg_count; /* number of segments */
108 struct _agp_segment *seg_list;
109 } agp_region;
110 #endif
111
112 typedef struct _agp_allocate {
113 int key; /* tag of allocation */
114 size_t pg_count; /* number of pages */
115 u_int32_t type; /* 0 == normal, other devspec */
116 u_int32_t physical; /* device specific (some devices
117 * need a phys address of the
118 * actual page behind the gatt
119 * table) */
120 } agp_allocate;
121
122 typedef struct _agp_bind {
123 int key; /* tag of allocation */
124 off_t pg_start; /* starting page to populate */
125 } agp_bind;
126
127 typedef struct _agp_unbind {
128 int key; /* tag of allocation */
129 u_int32_t priority; /* priority for paging out */
130 } agp_unbind;
131
132 #endif /* !_SYS_AGPIO_H_ */