109 lines
3.8 KiB
C
109 lines
3.8 KiB
C
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/* 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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/* Warning: this structure has a different order from i386
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on x86-64. The 32bit emulation code takes care of that.
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But you need to use this for 64bit, otherwise your X server
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will break. */
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struct mtrr_gentry
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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 regnum; /* Register number */
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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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/* 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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# 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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# endif
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#endif
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#endif /* _LINUX_MTRR_H */
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