/*  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/ioctl.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 /* CONFIG_MTRR */

#ifdef CONFIG_COMPAT

#include <linux/compat.h>

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 /* __KERNEL__ */

#endif  /*  _LINUX_MTRR_H  */