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422 giacomo 1
/*  Generic MTRR (Memory Type Range Register) ioctls.
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    Copyright (C) 1997-1999  Richard Gooch
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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    Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
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    The postal address is:
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      Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
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*/
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#ifndef _LINUX_MTRR_H
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#define _LINUX_MTRR_H
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#include <linux/config.h>
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#include <linux/ioctl.h>
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#define MTRR_IOCTL_BASE 'M'
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struct mtrr_sentry
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{
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    unsigned long base;    /*  Base address     */
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    unsigned int size;    /*  Size of region   */
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    unsigned int type;     /*  Type of region   */
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};
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struct mtrr_gentry
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{
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    unsigned int regnum;   /*  Register number  */
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    unsigned long base;    /*  Base address     */
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    unsigned int size;    /*  Size of region   */
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    unsigned int type;     /*  Type of region   */
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};
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/*  These are the various ioctls  */
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#define MTRRIOC_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry)
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#define MTRRIOC_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry)
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#define MTRRIOC_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry)
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#define MTRRIOC_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
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#define MTRRIOC_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry)
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#define MTRRIOC_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry)
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#define MTRRIOC_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry)
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#define MTRRIOC_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry)
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#define MTRRIOC_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
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#define MTRRIOC_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry)
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/*  These are the region types  */
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#define MTRR_TYPE_UNCACHABLE 0
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#define MTRR_TYPE_WRCOMB     1
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/*#define MTRR_TYPE_         2*/
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/*#define MTRR_TYPE_         3*/
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#define MTRR_TYPE_WRTHROUGH  4
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#define MTRR_TYPE_WRPROT     5
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#define MTRR_TYPE_WRBACK     6
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#define MTRR_NUM_TYPES       7
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#ifdef __KERNEL__
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extern char *mtrr_strings[];
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/*  The following functions are for use by other drivers  */
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# ifdef CONFIG_MTRR
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extern int mtrr_add (unsigned long base, unsigned long size,
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                     unsigned int type, char increment);
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extern int mtrr_add_page (unsigned long base, unsigned long size,
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                     unsigned int type, char increment);
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extern int mtrr_del (int reg, unsigned long base, unsigned long size);
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extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
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extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
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#  else
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static __inline__ int mtrr_add (unsigned long base, unsigned long size,
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                                unsigned int type, char increment)
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{
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    return -ENODEV;
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}
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static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
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                                unsigned int type, char increment)
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{
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    return -ENODEV;
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}
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static __inline__ int mtrr_del (int reg, unsigned long base,
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                                unsigned long size)
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{
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    return -ENODEV;
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}
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static __inline__ int mtrr_del_page (int reg, unsigned long base,
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                                unsigned long size)
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{
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    return -ENODEV;
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}
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static __inline__ void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) {;}
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#  endif
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#endif
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#endif  /*  _LINUX_MTRR_H  */