blob: c5959d6418bbba0c221e9269e1c6e68a22978c74 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* 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 _LINUX_MTRR_H
24#define _LINUX_MTRR_H
25
26#include <linux/config.h>
27#include <linux/ioctl.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. */
42struct mtrr_gentry
43{
44 unsigned long base; /* Base address */
45 unsigned int size; /* Size of region */
46 unsigned int regnum; /* Register number */
47 unsigned int type; /* Type of region */
48};
49
50/* These are the various ioctls */
51#define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry)
52#define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry)
53#define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry)
54#define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
55#define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry)
56#define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry)
57#define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry)
58#define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry)
59#define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
60#define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry)
61
62/* These are the region types */
63#define MTRR_TYPE_UNCACHABLE 0
64#define MTRR_TYPE_WRCOMB 1
65/*#define MTRR_TYPE_ 2*/
66/*#define MTRR_TYPE_ 3*/
67#define MTRR_TYPE_WRTHROUGH 4
68#define MTRR_TYPE_WRPROT 5
69#define MTRR_TYPE_WRBACK 6
70#define MTRR_NUM_TYPES 7
71
72#ifdef __KERNEL__
73
74/* The following functions are for use by other drivers */
75# ifdef CONFIG_MTRR
76extern int mtrr_add (unsigned long base, unsigned long size,
77 unsigned int type, char increment);
78extern int mtrr_add_page (unsigned long base, unsigned long size,
79 unsigned int type, char increment);
80extern int mtrr_del (int reg, unsigned long base, unsigned long size);
81extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
82# else
83static __inline__ int mtrr_add (unsigned long base, unsigned long size,
84 unsigned int type, char increment)
85{
86 return -ENODEV;
87}
88static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
89 unsigned int type, char increment)
90{
91 return -ENODEV;
92}
93static __inline__ int mtrr_del (int reg, unsigned long base,
94 unsigned long size)
95{
96 return -ENODEV;
97}
98static __inline__ int mtrr_del_page (int reg, unsigned long base,
99 unsigned long size)
100{
101 return -ENODEV;
102}
103
104# endif
105
106#endif
107
108#endif /* _LINUX_MTRR_H */