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Diffstat (limited to 'include/asm-x86_64/mtrr.h')
| -rw-r--r-- | include/asm-x86_64/mtrr.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/include/asm-x86_64/mtrr.h b/include/asm-x86_64/mtrr.h new file mode 100644 index 000000000000..c5959d6418bb --- /dev/null +++ b/include/asm-x86_64/mtrr.h @@ -0,0 +1,108 @@ +/* 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 int size; /* Size of region */ + unsigned int type; /* Type of region */ +}; + +/* Warning: this structure has a different order from i386 + on x86-64. The 32bit emulation code takes care of that. + But you need to use this for 64bit, otherwise your X server + will break. */ +struct mtrr_gentry +{ + unsigned long base; /* Base address */ + unsigned int size; /* Size of region */ + unsigned int regnum; /* Register number */ + 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); +# 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; +} + +# endif + +#endif + +#endif /* _LINUX_MTRR_H */ |