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/*  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>

#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   */

};

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 MTRR_NEED_STRINGS

static char *mtrr_strings[MTRR_NUM_TYPES] =

{

    "uncachable",               /* 0 */

    "write-combining",          /* 1 */

    "?",                        /* 2 */

    "?",                        /* 3 */

    "write-through",            /* 4 */

    "write-protect",            /* 5 */

    "write-back",               /* 6 */

};

#endif

#ifdef __KERNEL__

#include <linux/types.h>

/*  The following functions are for use by other drivers  */

#ifdef CONFIG_MTRR

extern int mtrr_add (__u64 base, __u32 size, unsigned int type, char increment);

extern int mtrr_add_page (__u64 base, __u32 size, unsigned int type, char increment);

extern int mtrr_del (int reg, __u64 base, __u32 size);

extern int mtrr_del_page (int reg, __u64 base, __u32 size);

#else

static __inline__ int mtrr_add (__u64 base, __u32 size,

                                unsigned int type, char increment)

{

    return -ENODEV;

}

static __inline__ int mtrr_add_page (__u64 base, __u32 size,

                                unsigned int type, char increment)

{

    return -ENODEV;

}

static __inline__ int mtrr_del (int reg, __u64 base, __u32 size)

{

    return -ENODEV;

}

static __inline__ int mtrr_del_page (int reg, __u64 base, __u32 size)

{

    return -ENODEV;

}

#endif

/*  The following functions are for initialisation: don't use them!  */

extern int mtrr_init (void);

#if defined(CONFIG_SMP) && defined(CONFIG_MTRR)

extern void mtrr_init_boot_cpu (void);

extern void mtrr_init_secondary_cpu (void);

#endif

#endif

#endif  /*  _LINUX_MTRR_H  */