2 * Generic MTRR (Memory Type Range Register) ioctls.
3 * Taken from the Linux kernel
6 * Graeme Russ, <graeme.russ@gmail.com>
8 * Copyright (C) 1997-1999 Richard Gooch <rgooch@atnf.csiro.au>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #ifndef _ASM_X86_MTRR_H
27 #define _ASM_X86_MTRR_H
29 #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
30 #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
34 #include <linux/types.h>
35 #include <linux/ioctl.h>
38 #define MTRR_IOCTL_BASE 'M'
41 unsigned long base; /* Base address */
42 unsigned int size; /* Size of region */
43 unsigned int type; /* Type of region */
47 * Warning: this structure has a different order from i386
48 * on x86-64. The 32bit emulation code takes care of that.
49 * But you need to use this for 64bit, otherwise your X server
55 unsigned int regnum; /* Register number */
56 unsigned long base; /* Base address */
57 unsigned int size; /* Size of region */
58 unsigned int type; /* Type of region */
64 unsigned long base; /* Base address */
65 unsigned int size; /* Size of region */
66 unsigned int regnum; /* Register number */
67 unsigned int type; /* Type of region */
69 #endif /* !__i386__ */
71 struct mtrr_var_range {
79 * In the Intel processor's MTRR interface, the MTRR type is always held in
82 typedef __u8 mtrr_type;
84 #define MTRR_NUM_FIXED_RANGES 88
85 #define MTRR_MAX_VAR_RANGES 256
87 struct mtrr_state_type {
88 struct mtrr_var_range var_ranges[MTRR_MAX_VAR_RANGES];
89 mtrr_type fixed_ranges[MTRR_NUM_FIXED_RANGES];
90 unsigned char enabled;
91 unsigned char have_fixed;
95 /* These are the various ioctls */
96 #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry)
97 #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry)
98 #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry)
99 #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
100 #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry)
101 #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry)
102 #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry)
103 #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry)
104 #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
105 #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry)
107 /* These are the region types */
108 #define MTRR_TYPE_UNCACHABLE 0
109 #define MTRR_TYPE_WRCOMB 1
110 /*#define MTRR_TYPE_ 2*/
111 /*#define MTRR_TYPE_ 3*/
112 #define MTRR_TYPE_WRTHROUGH 4
113 #define MTRR_TYPE_WRPROT 5
114 #define MTRR_TYPE_WRBACK 6
115 #define MTRR_NUM_TYPES 7
119 /* The following functions are for use by other drivers */
121 extern u8 mtrr_type_lookup(u64 addr, u64 end);
122 extern void mtrr_save_fixed_ranges(void *);
123 extern void mtrr_save_state(void);
124 extern int mtrr_add(unsigned long base, unsigned long size,
125 unsigned int type, bool increment);
126 extern int mtrr_add_page(unsigned long base, unsigned long size,
127 unsigned int type, bool increment);
128 extern int mtrr_del(int reg, unsigned long base, unsigned long size);
129 extern int mtrr_del_page(int reg, unsigned long base, unsigned long size);
130 extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
131 extern void mtrr_ap_init(void);
132 extern void mtrr_bp_init(void);
133 extern void set_mtrr_aps_delayed_init(void);
134 extern void mtrr_aps_init(void);
135 extern void mtrr_bp_restore(void);
136 extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
137 extern int amd_special_default_mtrr(void);
139 static inline u8 mtrr_type_lookup(u64 addr, u64 end)
146 #define mtrr_save_fixed_ranges(arg) do {} while (0)
147 #define mtrr_save_state() do {} while (0)
148 static inline int mtrr_del(int reg, unsigned long base, unsigned long size)
152 static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size)
156 static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
160 static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
164 #define mtrr_ap_init() do {} while (0)
165 #define mtrr_bp_init() do {} while (0)
166 #define set_mtrr_aps_delayed_init() do {} while (0)
167 #define mtrr_aps_init() do {} while (0)
168 #define mtrr_bp_restore() do {} while (0)
172 #include <linux/compat.h>
174 struct mtrr_sentry32 {
175 compat_ulong_t base; /* Base address */
176 compat_uint_t size; /* Size of region */
177 compat_uint_t type; /* Type of region */
180 struct mtrr_gentry32 {
181 compat_ulong_t regnum; /* Register number */
182 compat_uint_t base; /* Base address */
183 compat_uint_t size; /* Size of region */
184 compat_uint_t type; /* Type of region */
187 #define MTRR_IOCTL_BASE 'M'
189 #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
190 #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
191 #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
192 #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
193 #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
194 #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
195 #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
196 #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
197 #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
198 #define MTRRIOC32_KILL_PAGE_ENTRY \
199 _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
200 #endif /* CONFIG_COMPAT */
202 #endif /* __KERNEL__ */
204 #endif /* __ASSEMBLY__ */
206 #endif /* _ASM_X86_MTRR_H */