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297a99e1 TG |
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 _ASM_X86_MTRR_H | |
24 | #define _ASM_X86_MTRR_H | |
25 | ||
26 | #include <linux/ioctl.h> | |
27 | #include <linux/errno.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 | ||
43 | #ifdef __i386__ | |
44 | struct mtrr_gentry | |
45 | { | |
46 | unsigned int regnum; /* Register number */ | |
47 | unsigned long base; /* Base address */ | |
48 | unsigned int size; /* Size of region */ | |
49 | unsigned int type; /* Type of region */ | |
50 | }; | |
51 | ||
52 | #else /* __i386__ */ | |
53 | ||
54 | struct mtrr_gentry | |
55 | { | |
56 | unsigned long base; /* Base address */ | |
57 | unsigned int size; /* Size of region */ | |
58 | unsigned int regnum; /* Register number */ | |
59 | unsigned int type; /* Type of region */ | |
60 | }; | |
61 | #endif /* !__i386__ */ | |
62 | ||
63 | /* These are the various ioctls */ | |
64 | #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) | |
65 | #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) | |
66 | #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) | |
67 | #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) | |
68 | #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) | |
69 | #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) | |
70 | #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) | |
71 | #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) | |
72 | #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) | |
73 | #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) | |
74 | ||
75 | /* These are the region types */ | |
76 | #define MTRR_TYPE_UNCACHABLE 0 | |
77 | #define MTRR_TYPE_WRCOMB 1 | |
78 | /*#define MTRR_TYPE_ 2*/ | |
79 | /*#define MTRR_TYPE_ 3*/ | |
80 | #define MTRR_TYPE_WRTHROUGH 4 | |
81 | #define MTRR_TYPE_WRPROT 5 | |
82 | #define MTRR_TYPE_WRBACK 6 | |
83 | #define MTRR_NUM_TYPES 7 | |
84 | ||
96a388de | 85 | #ifdef __KERNEL__ |
297a99e1 TG |
86 | |
87 | /* The following functions are for use by other drivers */ | |
88 | # ifdef CONFIG_MTRR | |
89 | extern void mtrr_save_fixed_ranges(void *); | |
90 | extern void mtrr_save_state(void); | |
91 | extern int mtrr_add (unsigned long base, unsigned long size, | |
2d2ee8de | 92 | unsigned int type, bool increment); |
297a99e1 | 93 | extern int mtrr_add_page (unsigned long base, unsigned long size, |
2d2ee8de | 94 | unsigned int type, bool increment); |
297a99e1 TG |
95 | extern int mtrr_del (int reg, unsigned long base, unsigned long size); |
96 | extern int mtrr_del_page (int reg, unsigned long base, unsigned long size); | |
97 | extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi); | |
98 | extern void mtrr_ap_init(void); | |
99 | extern void mtrr_bp_init(void); | |
99fc8d42 | 100 | extern int mtrr_trim_uncached_memory(unsigned long end_pfn); |
297a99e1 TG |
101 | # else |
102 | #define mtrr_save_fixed_ranges(arg) do {} while (0) | |
103 | #define mtrr_save_state() do {} while (0) | |
104 | static __inline__ int mtrr_add (unsigned long base, unsigned long size, | |
2d2ee8de | 105 | unsigned int type, bool increment) |
297a99e1 TG |
106 | { |
107 | return -ENODEV; | |
108 | } | |
109 | static __inline__ int mtrr_add_page (unsigned long base, unsigned long size, | |
2d2ee8de | 110 | unsigned int type, bool increment) |
297a99e1 TG |
111 | { |
112 | return -ENODEV; | |
113 | } | |
114 | static __inline__ int mtrr_del (int reg, unsigned long base, | |
115 | unsigned long size) | |
116 | { | |
117 | return -ENODEV; | |
118 | } | |
119 | static __inline__ int mtrr_del_page (int reg, unsigned long base, | |
120 | unsigned long size) | |
121 | { | |
122 | return -ENODEV; | |
123 | } | |
99fc8d42 JB |
124 | static inline int mtrr_trim_uncached_memory(unsigned long end_pfn) |
125 | { | |
126 | return 0; | |
127 | } | |
297a99e1 TG |
128 | static __inline__ void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) {;} |
129 | ||
130 | #define mtrr_ap_init() do {} while (0) | |
131 | #define mtrr_bp_init() do {} while (0) | |
132 | # endif | |
133 | ||
134 | #ifdef CONFIG_COMPAT | |
135 | #include <linux/compat.h> | |
136 | ||
137 | struct mtrr_sentry32 | |
138 | { | |
139 | compat_ulong_t base; /* Base address */ | |
140 | compat_uint_t size; /* Size of region */ | |
141 | compat_uint_t type; /* Type of region */ | |
142 | }; | |
143 | ||
144 | struct mtrr_gentry32 | |
145 | { | |
146 | compat_ulong_t regnum; /* Register number */ | |
147 | compat_uint_t base; /* Base address */ | |
148 | compat_uint_t size; /* Size of region */ | |
149 | compat_uint_t type; /* Type of region */ | |
150 | }; | |
151 | ||
152 | #define MTRR_IOCTL_BASE 'M' | |
153 | ||
154 | #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) | |
155 | #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) | |
156 | #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) | |
157 | #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) | |
158 | #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) | |
159 | #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) | |
160 | #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) | |
161 | #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) | |
162 | #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) | |
163 | #define MTRRIOC32_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) | |
164 | #endif /* CONFIG_COMPAT */ | |
165 | ||
166 | #endif /* __KERNEL__ */ | |
167 | ||
168 | #endif /* _ASM_X86_MTRR_H */ |