mtrr.h
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上传日期:2013-04-10
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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 long size; /* Size of region */
- unsigned int type; /* Type of region */
- };
- struct mtrr_gentry
- {
- unsigned int regnum; /* Register number */
- unsigned long base; /* Base address */
- unsigned long 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 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__
- /* 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);
- # 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) {;}
- # 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 */