1 /* Generic MTRR (Memory Type Range Register) ioctls.
3 Copyright (C) 1997-1999 Richard Gooch
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.
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.
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.
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.
23 #ifndef _ASM_X86_MTRR_H
24 #define _ASM_X86_MTRR_H
26 #include <linux/ioctl.h>
27 #include <linux/errno.h>
29 #define MTRR_IOCTL_BASE 'M'
32 unsigned long base; /* Base address */
33 unsigned int size; /* Size of region */
34 unsigned int type; /* Type of region */
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
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 */
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 */
58 #endif /* !__i386__ */
60 struct mtrr_var_range {
67 /* In the Intel processor's MTRR interface, the MTRR type is always held in
71 #define MTRR_NUM_FIXED_RANGES 88
72 #define MTRR_MAX_VAR_RANGES 256
74 struct mtrr_state_type {
75 struct mtrr_var_range var_ranges[MTRR_MAX_VAR_RANGES];
76 mtrr_type fixed_ranges[MTRR_NUM_FIXED_RANGES];
77 unsigned char enabled;
78 unsigned char have_fixed;
82 #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
83 #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
85 /* These are the various ioctls */
86 #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry)
87 #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry)
88 #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry)
89 #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
90 #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry)
91 #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry)
92 #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry)
93 #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry)
94 #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
95 #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry)
97 /* These are the region types */
98 #define MTRR_TYPE_UNCACHABLE 0
99 #define MTRR_TYPE_WRCOMB 1
100 /*#define MTRR_TYPE_ 2*/
101 /*#define MTRR_TYPE_ 3*/
102 #define MTRR_TYPE_WRTHROUGH 4
103 #define MTRR_TYPE_WRPROT 5
104 #define MTRR_TYPE_WRBACK 6
105 #define MTRR_NUM_TYPES 7
109 /* The following functions are for use by other drivers */
111 extern u8 mtrr_type_lookup(u64 addr, u64 end);
112 extern void mtrr_save_fixed_ranges(void *);
113 extern void mtrr_save_state(void);
114 extern int mtrr_add(unsigned long base, unsigned long size,
115 unsigned int type, bool increment);
116 extern int mtrr_add_page(unsigned long base, unsigned long size,
117 unsigned int type, bool increment);
118 extern int mtrr_del(int reg, unsigned long base, unsigned long size);
119 extern int mtrr_del_page(int reg, unsigned long base, unsigned long size);
120 extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
121 extern void mtrr_ap_init(void);
122 extern void mtrr_bp_init(void);
123 extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
124 extern int amd_special_default_mtrr(void);
126 static inline u8 mtrr_type_lookup(u64 addr, u64 end)
133 #define mtrr_save_fixed_ranges(arg) do {} while (0)
134 #define mtrr_save_state() do {} while (0)
135 static inline int mtrr_add(unsigned long base, unsigned long size,
136 unsigned int type, bool increment)
140 static inline int mtrr_add_page(unsigned long base, unsigned long size,
141 unsigned int type, bool increment)
145 static inline int mtrr_del(int reg, unsigned long base, unsigned long size)
149 static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size)
153 static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
157 static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
161 #define mtrr_ap_init() do {} while (0)
162 #define mtrr_bp_init() do {} while (0)
166 #include <linux/compat.h>
168 struct mtrr_sentry32 {
169 compat_ulong_t base; /* Base address */
170 compat_uint_t size; /* Size of region */
171 compat_uint_t type; /* Type of region */
174 struct mtrr_gentry32 {
175 compat_ulong_t regnum; /* Register number */
176 compat_uint_t base; /* Base address */
177 compat_uint_t size; /* Size of region */
178 compat_uint_t type; /* Type of region */
181 #define MTRR_IOCTL_BASE 'M'
183 #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
184 #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
185 #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
186 #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
187 #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
188 #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
189 #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
190 #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
191 #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
192 #define MTRRIOC32_KILL_PAGE_ENTRY \
193 _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
194 #endif /* CONFIG_COMPAT */
196 #endif /* __KERNEL__ */
198 #endif /* _ASM_X86_MTRR_H */