include/asm-x86_64/mtrr.h

   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/config.h>
  27 #include <linux/ioctl.h>
  28 #include <linux/compat.h>
  29
  30 #define MTRR_IOCTL_BASE 'M'
  31
  32 struct mtrr_sentry
  33 {
  34     unsigned long base;    /*  Base address     */
  35     unsigned int size;    /*  Size of region   */
  36     unsigned int type;     /*  Type of region   */
  37 };
  38
  39 /* Warning: this structure has a different order from i386
  40    on x86-64. The 32bit emulation code takes care of that.
  41    But you need to use this for 64bit, otherwise your X server
  42    will break. */
  43 struct mtrr_gentry
  44 {
  45     unsigned long base;    /*  Base address     */
  46     unsigned int size;    /*  Size of region   */
  47     unsigned int regnum;   /*  Register number  */
  48     unsigned int type;     /*  Type of region   */
  49 };
  50
  51 /*  These are the various ioctls  */
  52 #define MTRRIOC_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry)
  53 #define MTRRIOC_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry)
  54 #define MTRRIOC_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry)
  55 #define MTRRIOC_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
  56 #define MTRRIOC_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry)
  57 #define MTRRIOC_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry)
  58 #define MTRRIOC_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry)
  59 #define MTRRIOC_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry)
  60 #define MTRRIOC_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
  61 #define MTRRIOC_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry)
  62
  63 /*  These are the region types  */
  64 #define MTRR_TYPE_UNCACHABLE 0
  65 #define MTRR_TYPE_WRCOMB     1
  66 /*#define MTRR_TYPE_         2*/
  67 /*#define MTRR_TYPE_         3*/
  68 #define MTRR_TYPE_WRTHROUGH  4
  69 #define MTRR_TYPE_WRPROT     5
  70 #define MTRR_TYPE_WRBACK     6
  71 #define MTRR_NUM_TYPES       7
  72
  73 #ifdef __KERNEL__
  74
  75 /*  The following functions are for use by other drivers  */
  76 # ifdef CONFIG_MTRR
  77 extern int mtrr_add (unsigned long base, unsigned long size,
  78                      unsigned int type, char increment);
  79 extern int mtrr_add_page (unsigned long base, unsigned long size,
  80                      unsigned int type, char increment);
  81 extern int mtrr_del (int reg, unsigned long base, unsigned long size);
  82 extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
  83 #  else
  84 static __inline__ int mtrr_add (unsigned long base, unsigned long size,
  85                                 unsigned int type, char increment)
  86 {
  87     return -ENODEV;
  88 }
  89 static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
  90                                 unsigned int type, char increment)
  91 {
  92     return -ENODEV;
  93 }
  94 static __inline__ int mtrr_del (int reg, unsigned long base,
  95                                 unsigned long size)
  96 {
  97     return -ENODEV;
  98 }
  99 static __inline__ int mtrr_del_page (int reg, unsigned long base,
 100                                 unsigned long size)
 101 {
 102     return -ENODEV;
 103 }
 104
 105 #  endif
 106
 107 #endif
 108
 109 #ifdef CONFIG_COMPAT
 110
 111 struct mtrr_sentry32
 112 {
 113     compat_ulong_t base;    /*  Base address     */
 114     compat_uint_t size;    /*  Size of region   */
 115     compat_uint_t type;     /*  Type of region   */
 116 };
 117
 118 struct mtrr_gentry32
 119 {
 120     compat_ulong_t regnum;   /*  Register number  */
 121     compat_uint_t base;    /*  Base address     */
 122     compat_uint_t size;    /*  Size of region   */
 123     compat_uint_t type;     /*  Type of region   */
 124 };
 125
 126 #define MTRR_IOCTL_BASE 'M'
 127
 128 #define MTRRIOC32_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry32)
 129 #define MTRRIOC32_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry32)
 130 #define MTRRIOC32_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry32)
 131 #define MTRRIOC32_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
 132 #define MTRRIOC32_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry32)
 133 #define MTRRIOC32_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry32)
 134 #define MTRRIOC32_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry32)
 135 #define MTRRIOC32_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry32)
 136 #define MTRRIOC32_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
 137 #define MTRRIOC32_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry32)
 138
 139 #endif /* CONFIG_COMPAT */
 140
 141 #endif  /*  _LINUX_MTRR_H  */