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 _LINUX_MTRR_H
24#define _LINUX_MTRR_H
25
26#include <linux/ioctl.h>
27
28#define	MTRR_IOCTL_BASE	'M'
29
30struct mtrr_sentry
31{
32    unsigned long base;    /*  Base address     */
33    unsigned int size;    /*  Size of region   */
34    unsigned int type;     /*  Type of region   */
35};
36
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
40   will break. */
41struct mtrr_gentry
42{
43    unsigned long base;    /*  Base address     */
44    unsigned int size;    /*  Size of region   */
45    unsigned int regnum;   /*  Register number  */
46    unsigned int type;     /*  Type of region   */
47};
48
49/*  These are the various ioctls  */
50#define MTRRIOC_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry)
51#define MTRRIOC_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry)
52#define MTRRIOC_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry)
53#define MTRRIOC_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
54#define MTRRIOC_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry)
55#define MTRRIOC_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry)
56#define MTRRIOC_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry)
57#define MTRRIOC_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry)
58#define MTRRIOC_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
59#define MTRRIOC_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry)
60
61/*  These are the region types  */
62#define MTRR_TYPE_UNCACHABLE 0
63#define MTRR_TYPE_WRCOMB     1
64/*#define MTRR_TYPE_         2*/
65/*#define MTRR_TYPE_         3*/
66#define MTRR_TYPE_WRTHROUGH  4
67#define MTRR_TYPE_WRPROT     5
68#define MTRR_TYPE_WRBACK     6
69#define MTRR_NUM_TYPES       7
70
71#ifdef __KERNEL__
72
73/*  The following functions are for use by other drivers  */
74# ifdef CONFIG_MTRR
75extern int mtrr_add (unsigned long base, unsigned long size,
76		     unsigned int type, char increment);
77extern int mtrr_add_page (unsigned long base, unsigned long size,
78		     unsigned int type, char increment);
79extern int mtrr_del (int reg, unsigned long base, unsigned long size);
80extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
81#  else
82static __inline__ int mtrr_add (unsigned long base, unsigned long size,
83				unsigned int type, char increment)
84{
85    return -ENODEV;
86}
87static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
88				unsigned int type, char increment)
89{
90    return -ENODEV;
91}
92static __inline__ int mtrr_del (int reg, unsigned long base,
93				unsigned long size)
94{
95    return -ENODEV;
96}
97static __inline__ int mtrr_del_page (int reg, unsigned long base,
98				unsigned long size)
99{
100    return -ENODEV;
101}
102
103#endif /* CONFIG_MTRR */
104
105#ifdef CONFIG_COMPAT
106#include <linux/compat.h>
107
108struct mtrr_sentry32
109{
110    compat_ulong_t base;    /*  Base address     */
111    compat_uint_t size;    /*  Size of region   */
112    compat_uint_t type;     /*  Type of region   */
113};
114
115struct mtrr_gentry32
116{
117    compat_ulong_t regnum;   /*  Register number  */
118    compat_uint_t base;    /*  Base address     */
119    compat_uint_t size;    /*  Size of region   */
120    compat_uint_t type;     /*  Type of region   */
121};
122
123#define MTRR_IOCTL_BASE 'M'
124
125#define MTRRIOC32_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry32)
126#define MTRRIOC32_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry32)
127#define MTRRIOC32_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry32)
128#define MTRRIOC32_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
129#define MTRRIOC32_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry32)
130#define MTRRIOC32_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry32)
131#define MTRRIOC32_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry32)
132#define MTRRIOC32_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry32)
133#define MTRRIOC32_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
134#define MTRRIOC32_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry32)
135
136#endif /* CONFIG_COMPAT */
137
138#ifdef CONFIG_MTRR
139extern void mtrr_ap_init(void);
140extern void mtrr_bp_init(void);
141extern void mtrr_save_fixed_ranges(void *);
142extern void mtrr_save_state(void);
143#else
144#define mtrr_ap_init() do {} while (0)
145#define mtrr_bp_init() do {} while (0)
146#define mtrr_save_fixed_ranges(arg) do {} while (0)
147#define mtrr_save_state() do {} while (0)
148#endif
149
150#endif /* __KERNEL__ */
151
152#endif  /*  _LINUX_MTRR_H  */
153