text: /*  Generic MTRR (Memory Type Range Register) ioctls.
  
      Copyright (C) 1997-1999  Richard Gooch
  
      This library is free software; you can redistribute it and/or
      modify it under the terms of the GNU Library General Public
      License as published by the Free Software Foundation; either
      version 2 of the License, or (at your option) any later version.
  
      This library is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      Library General Public License for more details.
  
      You should have received a copy of the GNU Library General Public
      License along with this library; if not, write to the Free
      Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  
      Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
      The postal address is:
        Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
  */
  #ifndef _LINUX_MTRR_H
  #define _LINUX_MTRR_H
  
  #include <linux/config.h>
  #include <linux/ioctl.h>
  #include <linux/compat.h>
  
  #define	MTRR_IOCTL_BASE	'M'
  
  struct mtrr_sentry
  {
      unsigned long base;    /*  Base address     */
      unsigned int size;    /*  Size of region   */
      unsigned int type;     /*  Type of region   */
  };
  
  /* Warning: this structure has a different order from i386
     on x86-64. The 32bit emulation code takes care of that.
     But you need to use this for 64bit, otherwise your X server
     will break. */
  struct mtrr_gentry
  {
      unsigned long base;    /*  Base address     */
      unsigned int size;    /*  Size of region   */
      unsigned int regnum;   /*  Register number  */
      unsigned int type;     /*  Type of region   */
  };
  
  /*  These are the various ioctls  */
  #define MTRRIOC_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry)
  #define MTRRIOC_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry)
  #define MTRRIOC_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry)
  #define MTRRIOC_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
  #define MTRRIOC_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry)
  #define MTRRIOC_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry)
  #define MTRRIOC_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry)
  #define MTRRIOC_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry)
  #define MTRRIOC_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
  #define MTRRIOC_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry)
  
  /*  These are the region types  */
  #define MTRR_TYPE_UNCACHABLE 0
  #define MTRR_TYPE_WRCOMB     1
  /*#define MTRR_TYPE_         2*/
  /*#define MTRR_TYPE_         3*/
  #define MTRR_TYPE_WRTHROUGH  4
  #define MTRR_TYPE_WRPROT     5
  #define MTRR_TYPE_WRBACK     6
  #define MTRR_NUM_TYPES       7
  
  #ifdef __KERNEL__
  
  /*  The following functions are for use by other drivers  */
  # ifdef CONFIG_MTRR
  extern int mtrr_add (unsigned long base, unsigned long size,
  		     unsigned int type, char increment);
  extern int mtrr_add_page (unsigned long base, unsigned long size,
  		     unsigned int type, char increment);
  extern int mtrr_del (int reg, unsigned long base, unsigned long size);
  extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
  #  else
  static __inline__ int mtrr_add (unsigned long base, unsigned long size,
  				unsigned int type, char increment)
  {
      return -ENODEV;
  }
  static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
  				unsigned int type, char increment)
  {
      return -ENODEV;
  }
  static __inline__ int mtrr_del (int reg, unsigned long base,
  				unsigned long size)
  {
      return -ENODEV;
  }
  static __inline__ int mtrr_del_page (int reg, unsigned long base,
  				unsigned long size)
  {
      return -ENODEV;
  }
  
  #  endif
  
  #endif
  
  #ifdef CONFIG_COMPAT
  
  struct mtrr_sentry32
  {
      compat_ulong_t base;    /*  Base address     */
      compat_uint_t size;    /*  Size of region   */
      compat_uint_t type;     /*  Type of region   */
  };
  
  struct mtrr_gentry32
  {
      compat_ulong_t regnum;   /*  Register number  */
      compat_uint_t base;    /*  Base address     */
      compat_uint_t size;    /*  Size of region   */
      compat_uint_t type;     /*  Type of region   */
  };
  
  #define MTRR_IOCTL_BASE 'M'
  
  #define MTRRIOC32_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry32)
  #define MTRRIOC32_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry32)
  #define MTRRIOC32_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry32)
  #define MTRRIOC32_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
  #define MTRRIOC32_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry32)
  #define MTRRIOC32_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry32)
  #define MTRRIOC32_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry32)
  #define MTRRIOC32_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry32)
  #define MTRRIOC32_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
  #define MTRRIOC32_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry32)
  
  #endif /* CONFIG_COMPAT */
  
  #endif  /*  _LINUX_MTRR_H  */
  