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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | /* Generic MTRR (Memory Type Range Register) ioctls. Copyright (C) 1997-1998 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) /* 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 */ # if defined(CONFIG_MTRR) || defined(CONFIG_MTRR_MODULE) extern int mtrr_add (unsigned long base, unsigned long size, unsigned int type, char increment); extern int mtrr_del (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_del (int reg, unsigned long base, unsigned long size) { return -ENODEV; } # endif /* The following functions are for initialisation: don't use them! */ extern int mtrr_init (void); # if defined(__SMP__) && defined(CONFIG_MTRR) extern void mtrr_init_boot_cpu (void); extern void mtrr_init_secondary_cpu (void); # endif #endif #endif /* _LINUX_MTRR_H */ |