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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 | |
af170c50 | 26 | #include <uapi/asm/mtrr.h> |
297a99e1 | 27 | |
297a99e1 | 28 | |
d0d98eed AL |
29 | /* |
30 | * The following functions are for use by other drivers that cannot use | |
31 | * arch_phys_wc_add and arch_phys_wc_del. | |
32 | */ | |
297a99e1 | 33 | # ifdef CONFIG_MTRR |
b73522e0 | 34 | extern u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform); |
297a99e1 TG |
35 | extern void mtrr_save_fixed_ranges(void *); |
36 | extern void mtrr_save_state(void); | |
9969b440 JP |
37 | extern int mtrr_add(unsigned long base, unsigned long size, |
38 | unsigned int type, bool increment); | |
39 | extern int mtrr_add_page(unsigned long base, unsigned long size, | |
40 | unsigned int type, bool increment); | |
41 | extern int mtrr_del(int reg, unsigned long base, unsigned long size); | |
42 | extern int mtrr_del_page(int reg, unsigned long base, unsigned long size); | |
297a99e1 TG |
43 | extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi); |
44 | extern void mtrr_ap_init(void); | |
45 | extern void mtrr_bp_init(void); | |
d0af9eed SS |
46 | extern void set_mtrr_aps_delayed_init(void); |
47 | extern void mtrr_aps_init(void); | |
48 | extern void mtrr_bp_restore(void); | |
99fc8d42 | 49 | extern int mtrr_trim_uncached_memory(unsigned long end_pfn); |
35605a10 | 50 | extern int amd_special_default_mtrr(void); |
297a99e1 | 51 | # else |
b73522e0 | 52 | static inline u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform) |
52783fa8 IM |
53 | { |
54 | /* | |
55 | * Return no-MTRRs: | |
56 | */ | |
3d3ca416 | 57 | return MTRR_TYPE_INVALID; |
52783fa8 | 58 | } |
297a99e1 TG |
59 | #define mtrr_save_fixed_ranges(arg) do {} while (0) |
60 | #define mtrr_save_state() do {} while (0) | |
9969b440 JP |
61 | static inline int mtrr_add(unsigned long base, unsigned long size, |
62 | unsigned int type, bool increment) | |
297a99e1 TG |
63 | { |
64 | return -ENODEV; | |
65 | } | |
9969b440 | 66 | static inline int mtrr_add_page(unsigned long base, unsigned long size, |
2d2ee8de | 67 | unsigned int type, bool increment) |
297a99e1 TG |
68 | { |
69 | return -ENODEV; | |
70 | } | |
9969b440 | 71 | static inline int mtrr_del(int reg, unsigned long base, unsigned long size) |
297a99e1 TG |
72 | { |
73 | return -ENODEV; | |
74 | } | |
9969b440 | 75 | static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size) |
297a99e1 TG |
76 | { |
77 | return -ENODEV; | |
78 | } | |
99fc8d42 JB |
79 | static inline int mtrr_trim_uncached_memory(unsigned long end_pfn) |
80 | { | |
81 | return 0; | |
82 | } | |
9969b440 JP |
83 | static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) |
84 | { | |
85 | } | |
297a99e1 TG |
86 | |
87 | #define mtrr_ap_init() do {} while (0) | |
88 | #define mtrr_bp_init() do {} while (0) | |
d0af9eed SS |
89 | #define set_mtrr_aps_delayed_init() do {} while (0) |
90 | #define mtrr_aps_init() do {} while (0) | |
91 | #define mtrr_bp_restore() do {} while (0) | |
297a99e1 TG |
92 | # endif |
93 | ||
94 | #ifdef CONFIG_COMPAT | |
95 | #include <linux/compat.h> | |
96 | ||
9969b440 | 97 | struct mtrr_sentry32 { |
297a99e1 TG |
98 | compat_ulong_t base; /* Base address */ |
99 | compat_uint_t size; /* Size of region */ | |
100 | compat_uint_t type; /* Type of region */ | |
101 | }; | |
102 | ||
9969b440 | 103 | struct mtrr_gentry32 { |
297a99e1 TG |
104 | compat_ulong_t regnum; /* Register number */ |
105 | compat_uint_t base; /* Base address */ | |
106 | compat_uint_t size; /* Size of region */ | |
107 | compat_uint_t type; /* Type of region */ | |
108 | }; | |
109 | ||
110 | #define MTRR_IOCTL_BASE 'M' | |
111 | ||
9969b440 JP |
112 | #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) |
113 | #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) | |
114 | #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) | |
115 | #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) | |
116 | #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) | |
117 | #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) | |
118 | #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) | |
119 | #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) | |
120 | #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) | |
121 | #define MTRRIOC32_KILL_PAGE_ENTRY \ | |
122 | _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) | |
297a99e1 TG |
123 | #endif /* CONFIG_COMPAT */ |
124 | ||
9b3aca62 TK |
125 | /* Bit fields for enabled in struct mtrr_state_type */ |
126 | #define MTRR_STATE_MTRR_FIXED_ENABLED 0x01 | |
127 | #define MTRR_STATE_MTRR_ENABLED 0x02 | |
128 | ||
1965aae3 | 129 | #endif /* _ASM_X86_MTRR_H */ |