ia64/xen-unstable

view old/xenolinux-2.4.16-sparse/include/asm-xeno/mtrr.h @ 235:d7d0a23b2e07

bitkeeper revision 1.93 (3e5a4e6bkPheUp3x1uufN2MS3LAB7A)

Latest and Greatest version of XenoLinux based on the Linux-2.4.21-pre4
kernel.
author iap10@labyrinth.cl.cam.ac.uk
date Mon Feb 24 16:55:07 2003 +0000 (2003-02-24)
parents
children
line source
1 /* Generic MTRR (Memory Type Range Register) ioctls.
3 Copyright (C) 1997-1999 Richard Gooch
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.
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.
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.
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
26 #include <linux/config.h>
27 #include <linux/ioctl.h>
29 #define MTRR_IOCTL_BASE 'M'
31 struct mtrr_sentry
32 {
33 unsigned long base; /* Base address */
34 unsigned long size; /* Size of region */
35 unsigned int type; /* Type of region */
36 };
38 struct mtrr_gentry
39 {
40 unsigned int regnum; /* Register number */
41 unsigned long base; /* Base address */
42 unsigned long size; /* Size of region */
43 unsigned int type; /* Type of region */
44 };
46 /* These are the various ioctls */
47 #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry)
48 #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry)
49 #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry)
50 #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
51 #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry)
52 #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry)
53 #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry)
54 #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry)
55 #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
56 #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry)
58 /* These are the region types */
59 #define MTRR_TYPE_UNCACHABLE 0
60 #define MTRR_TYPE_WRCOMB 1
61 /*#define MTRR_TYPE_ 2*/
62 /*#define MTRR_TYPE_ 3*/
63 #define MTRR_TYPE_WRTHROUGH 4
64 #define MTRR_TYPE_WRPROT 5
65 #define MTRR_TYPE_WRBACK 6
66 #define MTRR_NUM_TYPES 7
68 #ifdef MTRR_NEED_STRINGS
69 static char *mtrr_strings[MTRR_NUM_TYPES] =
70 {
71 "uncachable", /* 0 */
72 "write-combining", /* 1 */
73 "?", /* 2 */
74 "?", /* 3 */
75 "write-through", /* 4 */
76 "write-protect", /* 5 */
77 "write-back", /* 6 */
78 };
79 #endif
81 #ifdef __KERNEL__
83 /* The following functions are for use by other drivers */
84 # ifdef CONFIG_MTRR
85 extern int mtrr_add (unsigned long base, unsigned long size,
86 unsigned int type, char increment);
87 extern int mtrr_add_page (unsigned long base, unsigned long size,
88 unsigned int type, char increment);
89 extern int mtrr_del (int reg, unsigned long base, unsigned long size);
90 extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
91 extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
92 # else
93 static __inline__ int mtrr_add (unsigned long base, unsigned long size,
94 unsigned int type, char increment)
95 {
96 return -ENODEV;
97 }
98 static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
99 unsigned int type, char increment)
100 {
101 return -ENODEV;
102 }
103 static __inline__ int mtrr_del (int reg, unsigned long base,
104 unsigned long size)
105 {
106 return -ENODEV;
107 }
108 static __inline__ int mtrr_del_page (int reg, unsigned long base,
109 unsigned long size)
110 {
111 return -ENODEV;
112 }
114 static __inline__ void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) {;}
116 # endif
118 /* The following functions are for initialisation: don't use them! */
119 extern int mtrr_init (void);
120 # if defined(CONFIG_SMP) && defined(CONFIG_MTRR)
121 extern void mtrr_init_boot_cpu (void);
122 extern void mtrr_init_secondary_cpu (void);
123 # endif
125 #endif
127 #endif /* _LINUX_MTRR_H */