projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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 _LINUX_MTRR_H | |
| 24 | #define _LINUX_MTRR_H | |
| 25 | ||
| 26 | #include <linux/config.h> | |
| 27 | #include <linux/ioctl.h> | |
| 28 | ||
| 29 | #define MTRR_IOCTL_BASE 'M' | |
| 30 | ||
| 31 | struct 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 | struct mtrr_gentry | |
| 43 | { | |
| 44 | unsigned long base; /* Base address */ | |
| 45 | unsigned int size; /* Size of region */ | |
| 46 | unsigned int regnum; /* Register number */ | |
| 47 | unsigned int type; /* Type of region */ | |
| 48 | }; | |
| 49 | ||
| 50 | /* These are the various ioctls */ | |
| 51 | #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) | |
| 52 | #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) | |
| 53 | #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) | |
| 54 | #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) | |
| 55 | #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) | |
| 56 | #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) | |
| 57 | #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) | |
| 58 | #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) | |
| 59 | #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) | |
| 60 | #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) | |
| 61 | ||
| 62 | /* These are the region types */ | |
| 63 | #define MTRR_TYPE_UNCACHABLE 0 | |
| 64 | #define MTRR_TYPE_WRCOMB 1 | |
| 65 | /*#define MTRR_TYPE_ 2*/ | |
| 66 | /*#define MTRR_TYPE_ 3*/ | |
| 67 | #define MTRR_TYPE_WRTHROUGH 4 | |
| 68 | #define MTRR_TYPE_WRPROT 5 | |
| 69 | #define MTRR_TYPE_WRBACK 6 | |
| 70 | #define MTRR_NUM_TYPES 7 | |
| 71 | ||
| 72 | #ifdef __KERNEL__ | |
| 73 | ||
| 74 | /* The following functions are for use by other drivers */ | |
| 75 | # ifdef CONFIG_MTRR | |
| 76 | extern int mtrr_add (unsigned long base, unsigned long size, | |
| 77 | unsigned int type, char increment); | |
| 78 | extern int mtrr_add_page (unsigned long base, unsigned long size, | |
| 79 | unsigned int type, char increment); | |
| 80 | extern int mtrr_del (int reg, unsigned long base, unsigned long size); | |
| 81 | extern int mtrr_del_page (int reg, unsigned long base, unsigned long size); | |
| 82 | # else | |
| 83 | static __inline__ int mtrr_add (unsigned long base, unsigned long size, | |
| 84 | unsigned int type, char increment) | |
| 85 | { | |
| 86 | return -ENODEV; | |
| 87 | } | |
| 88 | static __inline__ int mtrr_add_page (unsigned long base, unsigned long size, | |
| 89 | unsigned int type, char increment) | |
| 90 | { | |
| 91 | return -ENODEV; | |
| 92 | } | |
| 93 | static __inline__ int mtrr_del (int reg, unsigned long base, | |
| 94 | unsigned long size) | |
| 95 | { | |
| 96 | return -ENODEV; | |
| 97 | } | |
| 98 | static __inline__ int mtrr_del_page (int reg, unsigned long base, | |
| 99 | unsigned long size) | |
| 100 | { | |
| 101 | return -ENODEV; | |
| 102 | } | |
| 103 | ||
| 104 | # endif | |
| 105 | ||
| 106 | #endif | |
| 107 | ||
| 108 | #endif /* _LINUX_MTRR_H */ |