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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 | */ | |
1965aae3 PA |
23 | #ifndef _ASM_X86_MTRR_H |
24 | #define _ASM_X86_MTRR_H | |
297a99e1 | 25 | |
d122072c | 26 | #include <linux/types.h> |
297a99e1 TG |
27 | #include <linux/ioctl.h> |
28 | #include <linux/errno.h> | |
29 | ||
30 | #define MTRR_IOCTL_BASE 'M' | |
31 | ||
9969b440 | 32 | struct mtrr_sentry { |
297a99e1 TG |
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__ | |
9969b440 | 44 | struct mtrr_gentry { |
297a99e1 TG |
45 | unsigned int regnum; /* Register number */ |
46 | unsigned long base; /* Base address */ | |
47 | unsigned int size; /* Size of region */ | |
48 | unsigned int type; /* Type of region */ | |
49 | }; | |
50 | ||
51 | #else /* __i386__ */ | |
52 | ||
9969b440 | 53 | struct mtrr_gentry { |
297a99e1 TG |
54 | unsigned long base; /* Base address */ |
55 | unsigned int size; /* Size of region */ | |
56 | unsigned int regnum; /* Register number */ | |
57 | unsigned int type; /* Type of region */ | |
58 | }; | |
59 | #endif /* !__i386__ */ | |
60 | ||
932d27a7 | 61 | struct mtrr_var_range { |
79f3b3cb KM |
62 | __u32 base_lo; |
63 | __u32 base_hi; | |
64 | __u32 mask_lo; | |
65 | __u32 mask_hi; | |
932d27a7 SY |
66 | }; |
67 | ||
68 | /* In the Intel processor's MTRR interface, the MTRR type is always held in | |
69 | an 8 bit field: */ | |
79f3b3cb | 70 | typedef __u8 mtrr_type; |
932d27a7 SY |
71 | |
72 | #define MTRR_NUM_FIXED_RANGES 88 | |
73 | #define MTRR_MAX_VAR_RANGES 256 | |
74 | ||
75 | struct mtrr_state_type { | |
76 | struct mtrr_var_range var_ranges[MTRR_MAX_VAR_RANGES]; | |
77 | mtrr_type fixed_ranges[MTRR_NUM_FIXED_RANGES]; | |
78 | unsigned char enabled; | |
79 | unsigned char have_fixed; | |
80 | mtrr_type def_type; | |
81 | }; | |
82 | ||
83 | #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg)) | |
84 | #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1) | |
85 | ||
297a99e1 TG |
86 | /* These are the various ioctls */ |
87 | #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) | |
88 | #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) | |
89 | #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) | |
90 | #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) | |
91 | #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) | |
92 | #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) | |
93 | #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) | |
94 | #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) | |
95 | #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) | |
96 | #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) | |
97 | ||
98 | /* These are the region types */ | |
99 | #define MTRR_TYPE_UNCACHABLE 0 | |
100 | #define MTRR_TYPE_WRCOMB 1 | |
101 | /*#define MTRR_TYPE_ 2*/ | |
102 | /*#define MTRR_TYPE_ 3*/ | |
103 | #define MTRR_TYPE_WRTHROUGH 4 | |
104 | #define MTRR_TYPE_WRPROT 5 | |
105 | #define MTRR_TYPE_WRBACK 6 | |
106 | #define MTRR_NUM_TYPES 7 | |
107 | ||
96a388de | 108 | #ifdef __KERNEL__ |
297a99e1 TG |
109 | |
110 | /* The following functions are for use by other drivers */ | |
111 | # ifdef CONFIG_MTRR | |
52783fa8 | 112 | extern u8 mtrr_type_lookup(u64 addr, u64 end); |
297a99e1 TG |
113 | extern void mtrr_save_fixed_ranges(void *); |
114 | extern void mtrr_save_state(void); | |
9969b440 JP |
115 | extern int mtrr_add(unsigned long base, unsigned long size, |
116 | unsigned int type, bool increment); | |
117 | extern int mtrr_add_page(unsigned long base, unsigned long size, | |
118 | unsigned int type, bool increment); | |
119 | extern int mtrr_del(int reg, unsigned long base, unsigned long size); | |
120 | extern int mtrr_del_page(int reg, unsigned long base, unsigned long size); | |
297a99e1 TG |
121 | extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi); |
122 | extern void mtrr_ap_init(void); | |
123 | extern void mtrr_bp_init(void); | |
d0af9eed SS |
124 | extern void set_mtrr_aps_delayed_init(void); |
125 | extern void mtrr_aps_init(void); | |
126 | extern void mtrr_bp_restore(void); | |
99fc8d42 | 127 | extern int mtrr_trim_uncached_memory(unsigned long end_pfn); |
35605a10 | 128 | extern int amd_special_default_mtrr(void); |
297a99e1 | 129 | # else |
52783fa8 IM |
130 | static inline u8 mtrr_type_lookup(u64 addr, u64 end) |
131 | { | |
132 | /* | |
133 | * Return no-MTRRs: | |
134 | */ | |
135 | return 0xff; | |
136 | } | |
297a99e1 TG |
137 | #define mtrr_save_fixed_ranges(arg) do {} while (0) |
138 | #define mtrr_save_state() do {} while (0) | |
9969b440 JP |
139 | static inline int mtrr_add(unsigned long base, unsigned long size, |
140 | unsigned int type, bool increment) | |
297a99e1 TG |
141 | { |
142 | return -ENODEV; | |
143 | } | |
9969b440 | 144 | static inline int mtrr_add_page(unsigned long base, unsigned long size, |
2d2ee8de | 145 | unsigned int type, bool increment) |
297a99e1 TG |
146 | { |
147 | return -ENODEV; | |
148 | } | |
9969b440 | 149 | static inline int mtrr_del(int reg, unsigned long base, unsigned long size) |
297a99e1 TG |
150 | { |
151 | return -ENODEV; | |
152 | } | |
9969b440 | 153 | static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size) |
297a99e1 TG |
154 | { |
155 | return -ENODEV; | |
156 | } | |
99fc8d42 JB |
157 | static inline int mtrr_trim_uncached_memory(unsigned long end_pfn) |
158 | { | |
159 | return 0; | |
160 | } | |
9969b440 JP |
161 | static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) |
162 | { | |
163 | } | |
297a99e1 TG |
164 | |
165 | #define mtrr_ap_init() do {} while (0) | |
166 | #define mtrr_bp_init() do {} while (0) | |
d0af9eed SS |
167 | #define set_mtrr_aps_delayed_init() do {} while (0) |
168 | #define mtrr_aps_init() do {} while (0) | |
169 | #define mtrr_bp_restore() do {} while (0) | |
297a99e1 TG |
170 | # endif |
171 | ||
172 | #ifdef CONFIG_COMPAT | |
173 | #include <linux/compat.h> | |
174 | ||
9969b440 | 175 | struct mtrr_sentry32 { |
297a99e1 TG |
176 | compat_ulong_t base; /* Base address */ |
177 | compat_uint_t size; /* Size of region */ | |
178 | compat_uint_t type; /* Type of region */ | |
179 | }; | |
180 | ||
9969b440 | 181 | struct mtrr_gentry32 { |
297a99e1 TG |
182 | compat_ulong_t regnum; /* Register number */ |
183 | compat_uint_t base; /* Base address */ | |
184 | compat_uint_t size; /* Size of region */ | |
185 | compat_uint_t type; /* Type of region */ | |
186 | }; | |
187 | ||
188 | #define MTRR_IOCTL_BASE 'M' | |
189 | ||
9969b440 JP |
190 | #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) |
191 | #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) | |
192 | #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) | |
193 | #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) | |
194 | #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) | |
195 | #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) | |
196 | #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) | |
197 | #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) | |
198 | #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) | |
199 | #define MTRRIOC32_KILL_PAGE_ENTRY \ | |
200 | _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) | |
297a99e1 TG |
201 | #endif /* CONFIG_COMPAT */ |
202 | ||
203 | #endif /* __KERNEL__ */ | |
204 | ||
1965aae3 | 205 | #endif /* _ASM_X86_MTRR_H */ |