LXR linux/include/asm-i386/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
  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 int regnum;   /*  Register number  */
  41    unsigned long base;    /*  Base address     */
  42    unsigned int size;    /*  Size of region   */
  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 __KERNEL__
  69
  70/*  The following functions are for use by other drivers  */
  71# ifdef CONFIG_MTRR
  72extern int mtrr_add (unsigned long base, unsigned long size,
  73                     unsigned int type, char increment);
  74extern int mtrr_add_page (unsigned long base, unsigned long size,
  75                     unsigned int type, char increment);
  76extern int mtrr_del (int reg, unsigned long base, unsigned long size);
  77extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
  78extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
  79#  else
  80static __inline__ int mtrr_add (unsigned long base, unsigned long size,
  81                                unsigned int type, char increment)
  82{
  83    return -ENODEV;
  84}
  85static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
  86                                unsigned int type, char increment)
  87{
  88    return -ENODEV;
  89}
  90static __inline__ int mtrr_del (int reg, unsigned long base,
  91                                unsigned long size)
  92{
  93    return -ENODEV;
  94}
  95static __inline__ int mtrr_del_page (int reg, unsigned long base,
  96                                unsigned long size)
  97{
  98    return -ENODEV;
  99}
 100
 101static __inline__ void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) {;}
 102
 103#  endif
 104
 105#endif
 106
 107#endif  /*  _LINUX_MTRR_H  */
 108