112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
/* 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>
|
|
#include <linux/errno.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 int regnum; /* Register number */
|
|
unsigned long base; /* Base address */
|
|
unsigned int size; /* Size of region */
|
|
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);
|
|
extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
|
|
extern void mtrr_ap_init(void);
|
|
extern void mtrr_bp_init(void);
|
|
# 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;
|
|
}
|
|
|
|
static __inline__ void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) {;}
|
|
|
|
#define mtrr_ap_init() do {} while (0)
|
|
#define mtrr_bp_init() do {} while (0)
|
|
# endif
|
|
|
|
#endif
|
|
|
|
#endif /* _LINUX_MTRR_H */
|