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1da177e4 LT |
1 | /* Generic MTRR (Memory Type Range Register) ioctls. |
2 | ||
3 | Copyright (C) 1997-1999 Richard Gooch | |
4 | ||
5 | This library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Library General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2 of the License, or (at your option) any later version. | |
9 | ||
10 | This library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Library General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Library General Public | |
16 | License along with this library; if not, write to the Free | |
17 | Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | ||
19 | Richard Gooch may be reached by email at rgooch@atnf.csiro.au | |
20 | The postal address is: | |
21 | Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia. | |
22 | */ | |
23 | #ifndef _LINUX_MTRR_H | |
24 | #define _LINUX_MTRR_H | |
25 | ||
1da177e4 LT |
26 | #include <linux/ioctl.h> |
27 | ||
28 | #define MTRR_IOCTL_BASE 'M' | |
29 | ||
30 | struct mtrr_sentry | |
31 | { | |
32 | unsigned long base; /* Base address */ | |
33 | unsigned int size; /* Size of region */ | |
34 | unsigned int type; /* Type of region */ | |
35 | }; | |
36 | ||
37 | /* Warning: this structure has a different order from i386 | |
38 | on x86-64. The 32bit emulation code takes care of that. | |
39 | But you need to use this for 64bit, otherwise your X server | |
40 | will break. */ | |
41 | struct mtrr_gentry | |
42 | { | |
43 | unsigned long base; /* Base address */ | |
44 | unsigned int size; /* Size of region */ | |
45 | unsigned int regnum; /* Register number */ | |
46 | unsigned int type; /* Type of region */ | |
47 | }; | |
48 | ||
49 | /* These are the various ioctls */ | |
50 | #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) | |
51 | #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) | |
52 | #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) | |
53 | #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) | |
54 | #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) | |
55 | #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) | |
56 | #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) | |
57 | #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) | |
58 | #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) | |
59 | #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) | |
60 | ||
61 | /* These are the region types */ | |
62 | #define MTRR_TYPE_UNCACHABLE 0 | |
63 | #define MTRR_TYPE_WRCOMB 1 | |
64 | /*#define MTRR_TYPE_ 2*/ | |
65 | /*#define MTRR_TYPE_ 3*/ | |
66 | #define MTRR_TYPE_WRTHROUGH 4 | |
67 | #define MTRR_TYPE_WRPROT 5 | |
68 | #define MTRR_TYPE_WRBACK 6 | |
69 | #define MTRR_NUM_TYPES 7 | |
70 | ||
71 | #ifdef __KERNEL__ | |
72 | ||
73 | /* The following functions are for use by other drivers */ | |
74 | # ifdef CONFIG_MTRR | |
75 | extern int mtrr_add (unsigned long base, unsigned long size, | |
76 | unsigned int type, char increment); | |
77 | extern int mtrr_add_page (unsigned long base, unsigned long size, | |
78 | unsigned int type, char increment); | |
79 | extern int mtrr_del (int reg, unsigned long base, unsigned long size); | |
80 | extern int mtrr_del_page (int reg, unsigned long base, unsigned long size); | |
81 | # else | |
82 | static __inline__ int mtrr_add (unsigned long base, unsigned long size, | |
83 | unsigned int type, char increment) | |
84 | { | |
85 | return -ENODEV; | |
86 | } | |
87 | static __inline__ int mtrr_add_page (unsigned long base, unsigned long size, | |
88 | unsigned int type, char increment) | |
89 | { | |
90 | return -ENODEV; | |
91 | } | |
92 | static __inline__ int mtrr_del (int reg, unsigned long base, | |
93 | unsigned long size) | |
94 | { | |
95 | return -ENODEV; | |
96 | } | |
97 | static __inline__ int mtrr_del_page (int reg, unsigned long base, | |
98 | unsigned long size) | |
99 | { | |
100 | return -ENODEV; | |
101 | } | |
102 | ||
2c23d62a | 103 | #endif /* CONFIG_MTRR */ |
1da177e4 | 104 | |
c5311781 | 105 | #ifdef CONFIG_COMPAT |
2c23d62a | 106 | #include <linux/compat.h> |
c5311781 BG |
107 | |
108 | struct mtrr_sentry32 | |
109 | { | |
110 | compat_ulong_t base; /* Base address */ | |
111 | compat_uint_t size; /* Size of region */ | |
112 | compat_uint_t type; /* Type of region */ | |
113 | }; | |
114 | ||
115 | struct mtrr_gentry32 | |
116 | { | |
117 | compat_ulong_t regnum; /* Register number */ | |
118 | compat_uint_t base; /* Base address */ | |
119 | compat_uint_t size; /* Size of region */ | |
120 | compat_uint_t type; /* Type of region */ | |
121 | }; | |
122 | ||
123 | #define MTRR_IOCTL_BASE 'M' | |
124 | ||
125 | #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) | |
126 | #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) | |
127 | #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) | |
128 | #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) | |
129 | #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) | |
130 | #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) | |
131 | #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) | |
132 | #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) | |
133 | #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) | |
134 | #define MTRRIOC32_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) | |
135 | ||
136 | #endif /* CONFIG_COMPAT */ | |
137 | ||
856f44ff AK |
138 | #ifdef CONFIG_MTRR |
139 | extern void mtrr_ap_init(void); | |
140 | extern void mtrr_bp_init(void); | |
2b3b4835 | 141 | extern void mtrr_save_fixed_ranges(void *); |
2b1f6278 | 142 | extern void mtrr_save_state(void); |
856f44ff AK |
143 | #else |
144 | #define mtrr_ap_init() do {} while (0) | |
145 | #define mtrr_bp_init() do {} while (0) | |
2b3b4835 | 146 | #define mtrr_save_fixed_ranges(arg) do {} while (0) |
2b1f6278 | 147 | #define mtrr_save_state() do {} while (0) |
856f44ff AK |
148 | #endif |
149 | ||
2c23d62a DW |
150 | #endif /* __KERNEL__ */ |
151 | ||
1da177e4 | 152 | #endif /* _LINUX_MTRR_H */ |