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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*/
23#ifndef _ASM_X86_MTRR_H
24#define _ASM_X86_MTRR_H
25
26#include <linux/ioctl.h>
27#include <linux/errno.h>
28
29#define MTRR_IOCTL_BASE 'M'
30
31struct mtrr_sentry
32{
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__
44struct mtrr_gentry
45{
46 unsigned int regnum; /* Register number */
47 unsigned long base; /* Base address */
48 unsigned int size; /* Size of region */
49 unsigned int type; /* Type of region */
50};
51
52#else /* __i386__ */
53
54struct mtrr_gentry
55{
56 unsigned long base; /* Base address */
57 unsigned int size; /* Size of region */
58 unsigned int regnum; /* Register number */
59 unsigned int type; /* Type of region */
60};
61#endif /* !__i386__ */
62
63/* These are the various ioctls */
64#define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry)
65#define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry)
66#define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry)
67#define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
68#define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry)
69#define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry)
70#define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry)
71#define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry)
72#define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
73#define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry)
74
75/* These are the region types */
76#define MTRR_TYPE_UNCACHABLE 0
77#define MTRR_TYPE_WRCOMB 1
78/*#define MTRR_TYPE_ 2*/
79/*#define MTRR_TYPE_ 3*/
80#define MTRR_TYPE_WRTHROUGH 4
81#define MTRR_TYPE_WRPROT 5
82#define MTRR_TYPE_WRBACK 6
83#define MTRR_NUM_TYPES 7
84
85#ifdef __KERNEL__
86
87/* The following functions are for use by other drivers */
88# ifdef CONFIG_MTRR
89extern void mtrr_save_fixed_ranges(void *);
90extern void mtrr_save_state(void);
91extern int mtrr_add (unsigned long base, unsigned long size,
92 unsigned int type, char increment);
93extern int mtrr_add_page (unsigned long base, unsigned long size,
94 unsigned int type, char increment);
95extern int mtrr_del (int reg, unsigned long base, unsigned long size);
96extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
97extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
98extern void mtrr_ap_init(void);
99extern void mtrr_bp_init(void);
100# else
101#define mtrr_save_fixed_ranges(arg) do {} while (0)
102#define mtrr_save_state() do {} while (0)
103static __inline__ int mtrr_add (unsigned long base, unsigned long size,
104 unsigned int type, char increment)
105{
106 return -ENODEV;
107}
108static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
109 unsigned int type, char increment)
110{
111 return -ENODEV;
112}
113static __inline__ int mtrr_del (int reg, unsigned long base,
114 unsigned long size)
115{
116 return -ENODEV;
117}
118static __inline__ int mtrr_del_page (int reg, unsigned long base,
119 unsigned long size)
120{
121 return -ENODEV;
122}
123
124static __inline__ void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) {;}
125
126#define mtrr_ap_init() do {} while (0)
127#define mtrr_bp_init() do {} while (0)
128# endif
129
130#ifdef CONFIG_COMPAT
131#include <linux/compat.h>
132
133struct mtrr_sentry32
134{
135 compat_ulong_t base; /* Base address */
136 compat_uint_t size; /* Size of region */
137 compat_uint_t type; /* Type of region */
138};
139
140struct mtrr_gentry32
141{
142 compat_ulong_t regnum; /* Register number */
143 compat_uint_t base; /* Base address */
144 compat_uint_t size; /* Size of region */
145 compat_uint_t type; /* Type of region */
146};
147
148#define MTRR_IOCTL_BASE 'M'
149
150#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
151#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
152#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
153#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
154#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
155#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
156#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
157#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
158#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
159#define MTRRIOC32_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
160#endif /* CONFIG_COMPAT */
161
162#endif /* __KERNEL__ */
163
164#endif /* _ASM_X86_MTRR_H */