LXR linux-old/include/asm-x86

   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
  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
  38struct mtrr_gentry
  39{
  40    unsigned long base;    /*  Base address     */
  41    unsigned int size;    /*  Size of region   */
  42    unsigned int regnum;   /*  Register number  */
  43    unsigned int type;     /*  Type of region   */
  44};
  45
  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)
  57
  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
  67
  68#ifdef MTRR_NEED_STRINGS
  69static 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
  80
  81#ifdef __KERNEL__
  82#include <linux/types.h>
  83
  84/*  The following functions are for use by other drivers  */
  85#ifdef CONFIG_MTRR
  86extern int mtrr_add (__u64 base, __u32 size, unsigned int type, char increment);
  87extern int mtrr_add_page (__u64 base, __u32 size, unsigned int type, char increment);
  88extern int mtrr_del (int reg, __u64 base, __u32 size);
  89extern int mtrr_del_page (int reg, __u64 base, __u32 size);
  90#else
  91static __inline__ int mtrr_add (__u64 base, __u32 size,
  92                                unsigned int type, char increment)
  93{
  94    return -ENODEV;
  95}
  96static __inline__ int mtrr_add_page (__u64 base, __u32 size,
  97                                unsigned int type, char increment)
  98{
  99    return -ENODEV;
 100}
 101static __inline__ int mtrr_del (int reg, __u64 base, __u32 size)
 102{
 103    return -ENODEV;
 104}
 105static __inline__ int mtrr_del_page (int reg, __u64 base, __u32 size)
 106{
 107    return -ENODEV;
 108}
 109#endif
 110
 111/*  The following functions are for initialisation: don't use them!  */
 112extern int mtrr_init (void);
 113#if defined(CONFIG_SMP) && defined(CONFIG_MTRR)
 114extern void mtrr_init_boot_cpu (void);
 115extern void mtrr_init_secondary_cpu (void);
 116#endif
 117
 118#endif
 119
 120#endif  /*  _LINUX_MTRR_H  */
 121