LXR linux/include/asm-x86/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 _ASM_X86_MTRR_H
  24#define _ASM_X86_MTRR_H
  25
  26#include <linux/ioctl.h>
  27#include <linux/errno.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
  38/* Warning: this structure has a different order from i386
  39   on x86-64. The 32bit emulation code takes care of that.
  40   But you need to use this for 64bit, otherwise your X server
  41   will break. */
  42
  43#ifdef __i386__
  44struct mtrr_gentry
  45{
  46    unsigned int regnum;   /*  Register number  */
  47    unsigned long base;    /*  Base address     */
  48    unsigned int size;    /*  Size of region   */
  49    unsigned int type;     /*  Type of region   */
  50};
  51
  52#else /* __i386__ */
  53
  54struct mtrr_gentry
  55{
  56    unsigned long base;    /*  Base address     */
  57    unsigned int size;    /*  Size of region   */
  58    unsigned int regnum;   /*  Register number  */
  59    unsigned int type;     /*  Type of region   */
  60};
  61#endif /* !__i386__ */
  62
  63/*  These are the various ioctls  */
  64#define MTRRIOC_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry)
  65#define MTRRIOC_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry)
  66#define MTRRIOC_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry)
  67#define MTRRIOC_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
  68#define MTRRIOC_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry)
  69#define MTRRIOC_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry)
  70#define MTRRIOC_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry)
  71#define MTRRIOC_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry)
  72#define MTRRIOC_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
  73#define MTRRIOC_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry)
  74
  75/*  These are the region types  */
  76#define MTRR_TYPE_UNCACHABLE 0
  77#define MTRR_TYPE_WRCOMB     1
  78/*#define MTRR_TYPE_         2*/
  79/*#define MTRR_TYPE_         3*/
  80#define MTRR_TYPE_WRTHROUGH  4
  81#define MTRR_TYPE_WRPROT     5
  82#define MTRR_TYPE_WRBACK     6
  83#define MTRR_NUM_TYPES       7
  84
  85#ifdef __KERNEL__
  86
  87/*  The following functions are for use by other drivers  */
  88# ifdef CONFIG_MTRR
  89extern void mtrr_save_fixed_ranges(void *);
  90extern void mtrr_save_state(void);
  91extern int mtrr_add (unsigned long base, unsigned long size,
  92                     unsigned int type, bool increment);
  93extern int mtrr_add_page (unsigned long base, unsigned long size,
  94                     unsigned int type, bool increment);
  95extern int mtrr_del (int reg, unsigned long base, unsigned long size);
  96extern int mtrr_del_page (int reg, unsigned long base, unsigned long size);
  97extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
  98extern void mtrr_ap_init(void);
  99extern void mtrr_bp_init(void);
 100extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
 101#  else
 102#define mtrr_save_fixed_ranges(arg) do {} while (0)
 103#define mtrr_save_state() do {} while (0)
 104static __inline__ int mtrr_add (unsigned long base, unsigned long size,
 105                                unsigned int type, bool increment)
 106{
 107    return -ENODEV;
 108}
 109static __inline__ int mtrr_add_page (unsigned long base, unsigned long size,
 110                                unsigned int type, bool increment)
 111{
 112    return -ENODEV;
 113}
 114static __inline__ int mtrr_del (int reg, unsigned long base,
 115                                unsigned long size)
 116{
 117    return -ENODEV;
 118}
 119static __inline__ int mtrr_del_page (int reg, unsigned long base,
 120                                unsigned long size)
 121{
 122    return -ENODEV;
 123}
 124static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
 125{
 126        return 0;
 127}
 128static __inline__ void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) {;}
 129
 130#define mtrr_ap_init() do {} while (0)
 131#define mtrr_bp_init() do {} while (0)
 132#  endif
 133
 134#ifdef CONFIG_COMPAT
 135#include <linux/compat.h>
 136
 137struct mtrr_sentry32
 138{
 139    compat_ulong_t base;    /*  Base address     */
 140    compat_uint_t size;    /*  Size of region   */
 141    compat_uint_t type;     /*  Type of region   */
 142};
 143
 144struct mtrr_gentry32
 145{
 146    compat_ulong_t regnum;   /*  Register number  */
 147    compat_uint_t base;    /*  Base address     */
 148    compat_uint_t size;    /*  Size of region   */
 149    compat_uint_t type;     /*  Type of region   */
 150};
 151
 152#define MTRR_IOCTL_BASE 'M'
 153
 154#define MTRRIOC32_ADD_ENTRY        _IOW(MTRR_IOCTL_BASE,  0, struct mtrr_sentry32)
 155#define MTRRIOC32_SET_ENTRY        _IOW(MTRR_IOCTL_BASE,  1, struct mtrr_sentry32)
 156#define MTRRIOC32_DEL_ENTRY        _IOW(MTRR_IOCTL_BASE,  2, struct mtrr_sentry32)
 157#define MTRRIOC32_GET_ENTRY        _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
 158#define MTRRIOC32_KILL_ENTRY       _IOW(MTRR_IOCTL_BASE,  4, struct mtrr_sentry32)
 159#define MTRRIOC32_ADD_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  5, struct mtrr_sentry32)
 160#define MTRRIOC32_SET_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  6, struct mtrr_sentry32)
 161#define MTRRIOC32_DEL_PAGE_ENTRY   _IOW(MTRR_IOCTL_BASE,  7, struct mtrr_sentry32)
 162#define MTRRIOC32_GET_PAGE_ENTRY   _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
 163#define MTRRIOC32_KILL_PAGE_ENTRY  _IOW(MTRR_IOCTL_BASE,  9, struct mtrr_sentry32)
 164#endif /* CONFIG_COMPAT */
 165
 166#endif /* __KERNEL__ */
 167
 168#endif  /*  _ASM_X86_MTRR_H  */
 169