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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[linux-2.6-block.git] / arch / x86 / include / asm / mtrr.h
CommitLineData
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 32struct 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 44struct 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 53struct 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 61struct 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 70typedef __u8 mtrr_type;
932d27a7
SY		 71
72#define MTRR_NUM_FIXED_RANGES 88
73#define MTRR_MAX_VAR_RANGES 256
74
75struct 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 112extern u8 mtrr_type_lookup(u64 addr, u64 end);
297a99e1
TG		 113extern void mtrr_save_fixed_ranges(void *);
114extern void mtrr_save_state(void);
9969b440
JP		 115extern int mtrr_add(unsigned long base, unsigned long size,
116 unsigned int type, bool increment);
117extern int mtrr_add_page(unsigned long base, unsigned long size,
118 unsigned int type, bool increment);
119extern int mtrr_del(int reg, unsigned long base, unsigned long size);
120extern int mtrr_del_page(int reg, unsigned long base, unsigned long size);
297a99e1
TG		 121extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
122extern void mtrr_ap_init(void);
123extern void mtrr_bp_init(void);
99fc8d42 124extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
35605a10 125extern int amd_special_default_mtrr(void);
297a99e1 126# else
52783fa8
IM		 127static inline u8 mtrr_type_lookup(u64 addr, u64 end)
128{
129 /*
130 * Return no-MTRRs:
131 */
132 return 0xff;
133}
297a99e1
TG		 134#define mtrr_save_fixed_ranges(arg) do {} while (0)
135#define mtrr_save_state() do {} while (0)
9969b440
JP		 136static inline int mtrr_add(unsigned long base, unsigned long size,
137 unsigned int type, bool increment)
297a99e1
TG		 138{
139 return -ENODEV;
140}
9969b440 141static inline int mtrr_add_page(unsigned long base, unsigned long size,
2d2ee8de 142 unsigned int type, bool increment)
297a99e1
TG		 143{
144 return -ENODEV;
145}
9969b440 146static inline int mtrr_del(int reg, unsigned long base, unsigned long size)
297a99e1
TG		 147{
148 return -ENODEV;
149}
9969b440 150static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size)
297a99e1
TG		 151{
152 return -ENODEV;
153}
99fc8d42
JB		 154static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
155{
156 return 0;
157}
9969b440
JP		 158static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
159{
160}
297a99e1
TG		 161
162#define mtrr_ap_init() do {} while (0)
163#define mtrr_bp_init() do {} while (0)
164# endif
165
166#ifdef CONFIG_COMPAT
167#include <linux/compat.h>
168
9969b440 169struct mtrr_sentry32 {
297a99e1
TG		 170 compat_ulong_t base; /* Base address */
171 compat_uint_t size; /* Size of region */
172 compat_uint_t type; /* Type of region */
173};
174
9969b440 175struct mtrr_gentry32 {
297a99e1
TG		 176 compat_ulong_t regnum; /* Register number */
177 compat_uint_t base; /* Base address */
178 compat_uint_t size; /* Size of region */
179 compat_uint_t type; /* Type of region */
180};
181
182#define MTRR_IOCTL_BASE 'M'
183
9969b440
JP		 184#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
185#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
186#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
187#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
188#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
189#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
190#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
191#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
192#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
193#define MTRRIOC32_KILL_PAGE_ENTRY \
194 _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
297a99e1
TG		 195#endif /* CONFIG_COMPAT */
196
197#endif /* __KERNEL__ */
198
1965aae3 199#endif /* _ASM_X86_MTRR_H */
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