]>
Commit | Line | Data |
---|---|---|
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 | */ | |
77ef50a5 VN |
23 | #ifndef ASM_X86__MTRR_H |
24 | #define ASM_X86__MTRR_H | |
297a99e1 TG |
25 | |
26 | #include <linux/ioctl.h> | |
27 | #include <linux/errno.h> | |
28 | ||
29 | #define MTRR_IOCTL_BASE 'M' | |
30 | ||
9969b440 | 31 | struct mtrr_sentry { |
297a99e1 TG |
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 | ||
42 | #ifdef __i386__ | |
9969b440 | 43 | struct mtrr_gentry { |
297a99e1 TG |
44 | unsigned int regnum; /* Register number */ |
45 | unsigned long base; /* Base address */ | |
46 | unsigned int size; /* Size of region */ | |
47 | unsigned int type; /* Type of region */ | |
48 | }; | |
49 | ||
50 | #else /* __i386__ */ | |
51 | ||
9969b440 | 52 | struct mtrr_gentry { |
297a99e1 TG |
53 | unsigned long base; /* Base address */ |
54 | unsigned int size; /* Size of region */ | |
55 | unsigned int regnum; /* Register number */ | |
56 | unsigned int type; /* Type of region */ | |
57 | }; | |
58 | #endif /* !__i386__ */ | |
59 | ||
60 | /* These are the various ioctls */ | |
61 | #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) | |
62 | #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) | |
63 | #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) | |
64 | #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) | |
65 | #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) | |
66 | #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) | |
67 | #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) | |
68 | #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) | |
69 | #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) | |
70 | #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) | |
71 | ||
72 | /* These are the region types */ | |
73 | #define MTRR_TYPE_UNCACHABLE 0 | |
74 | #define MTRR_TYPE_WRCOMB 1 | |
75 | /*#define MTRR_TYPE_ 2*/ | |
76 | /*#define MTRR_TYPE_ 3*/ | |
77 | #define MTRR_TYPE_WRTHROUGH 4 | |
78 | #define MTRR_TYPE_WRPROT 5 | |
79 | #define MTRR_TYPE_WRBACK 6 | |
80 | #define MTRR_NUM_TYPES 7 | |
81 | ||
96a388de | 82 | #ifdef __KERNEL__ |
297a99e1 TG |
83 | |
84 | /* The following functions are for use by other drivers */ | |
85 | # ifdef CONFIG_MTRR | |
52783fa8 | 86 | extern u8 mtrr_type_lookup(u64 addr, u64 end); |
297a99e1 TG |
87 | extern void mtrr_save_fixed_ranges(void *); |
88 | extern void mtrr_save_state(void); | |
9969b440 JP |
89 | extern int mtrr_add(unsigned long base, unsigned long size, |
90 | unsigned int type, bool increment); | |
91 | extern int mtrr_add_page(unsigned long base, unsigned long size, | |
92 | unsigned int type, bool increment); | |
93 | extern int mtrr_del(int reg, unsigned long base, unsigned long size); | |
94 | extern int mtrr_del_page(int reg, unsigned long base, unsigned long size); | |
297a99e1 TG |
95 | extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi); |
96 | extern void mtrr_ap_init(void); | |
97 | extern void mtrr_bp_init(void); | |
99fc8d42 | 98 | extern int mtrr_trim_uncached_memory(unsigned long end_pfn); |
35605a10 | 99 | extern int amd_special_default_mtrr(void); |
297a99e1 | 100 | # else |
52783fa8 IM |
101 | static inline u8 mtrr_type_lookup(u64 addr, u64 end) |
102 | { | |
103 | /* | |
104 | * Return no-MTRRs: | |
105 | */ | |
106 | return 0xff; | |
107 | } | |
297a99e1 TG |
108 | #define mtrr_save_fixed_ranges(arg) do {} while (0) |
109 | #define mtrr_save_state() do {} while (0) | |
9969b440 JP |
110 | static inline int mtrr_add(unsigned long base, unsigned long size, |
111 | unsigned int type, bool increment) | |
297a99e1 TG |
112 | { |
113 | return -ENODEV; | |
114 | } | |
9969b440 | 115 | static inline int mtrr_add_page(unsigned long base, unsigned long size, |
2d2ee8de | 116 | unsigned int type, bool increment) |
297a99e1 TG |
117 | { |
118 | return -ENODEV; | |
119 | } | |
9969b440 | 120 | static inline int mtrr_del(int reg, unsigned long base, unsigned long size) |
297a99e1 TG |
121 | { |
122 | return -ENODEV; | |
123 | } | |
9969b440 | 124 | static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size) |
297a99e1 TG |
125 | { |
126 | return -ENODEV; | |
127 | } | |
99fc8d42 JB |
128 | static inline int mtrr_trim_uncached_memory(unsigned long end_pfn) |
129 | { | |
130 | return 0; | |
131 | } | |
9969b440 JP |
132 | static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) |
133 | { | |
134 | } | |
297a99e1 TG |
135 | |
136 | #define mtrr_ap_init() do {} while (0) | |
137 | #define mtrr_bp_init() do {} while (0) | |
138 | # endif | |
139 | ||
140 | #ifdef CONFIG_COMPAT | |
141 | #include <linux/compat.h> | |
142 | ||
9969b440 | 143 | struct mtrr_sentry32 { |
297a99e1 TG |
144 | compat_ulong_t base; /* Base address */ |
145 | compat_uint_t size; /* Size of region */ | |
146 | compat_uint_t type; /* Type of region */ | |
147 | }; | |
148 | ||
9969b440 | 149 | struct mtrr_gentry32 { |
297a99e1 TG |
150 | compat_ulong_t regnum; /* Register number */ |
151 | compat_uint_t base; /* Base address */ | |
152 | compat_uint_t size; /* Size of region */ | |
153 | compat_uint_t type; /* Type of region */ | |
154 | }; | |
155 | ||
156 | #define MTRR_IOCTL_BASE 'M' | |
157 | ||
9969b440 JP |
158 | #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) |
159 | #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) | |
160 | #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) | |
161 | #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) | |
162 | #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) | |
163 | #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) | |
164 | #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) | |
165 | #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) | |
166 | #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) | |
167 | #define MTRRIOC32_KILL_PAGE_ENTRY \ | |
168 | _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) | |
297a99e1 TG |
169 | #endif /* CONFIG_COMPAT */ |
170 | ||
171 | #endif /* __KERNEL__ */ | |
172 | ||
77ef50a5 | 173 | #endif /* ASM_X86__MTRR_H */ |