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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 | ||
26 | #include <linux/config.h> | |
27 | #include <linux/ioctl.h> | |
28 | ||
29 | #define MTRR_IOCTL_BASE 'M' | |
30 | ||
31 | struct mtrr_sentry | |
32 | { | |
33 | unsigned long base; /* Base address */ | |
34 | unsigned int size; /* Size of region */ | |
35 | unsigned int type; /* Type of region */ | |
36 | }; | |
37 | ||
38 | /* Warning: this structure has a different order from i386 | |
39 | on x86-64. The 32bit emulation code takes care of that. | |
40 | But you need to use this for 64bit, otherwise your X server | |
41 | will break. */ | |
42 | struct mtrr_gentry | |
43 | { | |
44 | unsigned long base; /* Base address */ | |
45 | unsigned int size; /* Size of region */ | |
46 | unsigned int regnum; /* Register number */ | |
47 | unsigned int type; /* Type of region */ | |
48 | }; | |
49 | ||
50 | /* These are the various ioctls */ | |
51 | #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) | |
52 | #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) | |
53 | #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) | |
54 | #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) | |
55 | #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) | |
56 | #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) | |
57 | #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) | |
58 | #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) | |
59 | #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) | |
60 | #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) | |
61 | ||
62 | /* These are the region types */ | |
63 | #define MTRR_TYPE_UNCACHABLE 0 | |
64 | #define MTRR_TYPE_WRCOMB 1 | |
65 | /*#define MTRR_TYPE_ 2*/ | |
66 | /*#define MTRR_TYPE_ 3*/ | |
67 | #define MTRR_TYPE_WRTHROUGH 4 | |
68 | #define MTRR_TYPE_WRPROT 5 | |
69 | #define MTRR_TYPE_WRBACK 6 | |
70 | #define MTRR_NUM_TYPES 7 | |
71 | ||
72 | #ifdef __KERNEL__ | |
73 | ||
74 | /* The following functions are for use by other drivers */ | |
75 | # ifdef CONFIG_MTRR | |
76 | extern int mtrr_add (unsigned long base, unsigned long size, | |
77 | unsigned int type, char increment); | |
78 | extern int mtrr_add_page (unsigned long base, unsigned long size, | |
79 | unsigned int type, char increment); | |
80 | extern int mtrr_del (int reg, unsigned long base, unsigned long size); | |
81 | extern int mtrr_del_page (int reg, unsigned long base, unsigned long size); | |
82 | # else | |
83 | static __inline__ int mtrr_add (unsigned long base, unsigned long size, | |
84 | unsigned int type, char increment) | |
85 | { | |
86 | return -ENODEV; | |
87 | } | |
88 | static __inline__ int mtrr_add_page (unsigned long base, unsigned long size, | |
89 | unsigned int type, char increment) | |
90 | { | |
91 | return -ENODEV; | |
92 | } | |
93 | static __inline__ int mtrr_del (int reg, unsigned long base, | |
94 | unsigned long size) | |
95 | { | |
96 | return -ENODEV; | |
97 | } | |
98 | static __inline__ int mtrr_del_page (int reg, unsigned long base, | |
99 | unsigned long size) | |
100 | { | |
101 | return -ENODEV; | |
102 | } | |
103 | ||
104 | # endif | |
105 | ||
106 | #endif | |
107 | ||
108 | #endif /* _LINUX_MTRR_H */ |