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 _UAPI_ASM_X86_MTRR_H 24 #define _UAPI_ASM_X86_MTRR_H 25 26 #include <linux/types.h> 27 #include <linux/ioctl.h> 28 #include <linux/errno.h> 29 30 #define MTRR_IOCTL_BASE 'M' 31 32 /* Warning: this structure has a different order from i386 33 on x86-64. The 32bit emulation code takes care of that. 34 But you need to use this for 64bit, otherwise your X server 35 will break. */ 36 37 #ifdef __i386__ 38 struct mtrr_sentry { 39 unsigned long base; /* Base address */ 40 unsigned int size; /* Size of region */ 41 unsigned int type; /* Type of region */ 42 }; 43 44 struct mtrr_gentry { 45 unsigned int regnum; /* Register number */ 46 unsigned long base; /* Base address */ 47 unsigned int size; /* Size of region */ 48 unsigned int type; /* Type of region */ 49 }; 50 51 #else /* __i386__ */ 52 53 struct mtrr_sentry { 54 __u64 base; /* Base address */ 55 __u32 size; /* Size of region */ 56 __u32 type; /* Type of region */ 57 }; 58 59 struct mtrr_gentry { 60 __u64 base; /* Base address */ 61 __u32 size; /* Size of region */ 62 __u32 regnum; /* Register number */ 63 __u32 type; /* Type of region */ 64 __u32 _pad; /* Unused */ 65 }; 66 67 #endif /* !__i386__ */ 68 69 struct mtrr_var_range { 70 __u32 base_lo; 71 __u32 base_hi; 72 __u32 mask_lo; 73 __u32 mask_hi; 74 }; 75 76 /* In the Intel processor's MTRR interface, the MTRR type is always held in 77 an 8 bit field: */ 78 typedef __u8 mtrr_type; 79 80 #define MTRR_NUM_FIXED_RANGES 88 81 #define MTRR_MAX_VAR_RANGES 256 82 83 struct mtrr_state_type { 84 struct mtrr_var_range var_ranges[MTRR_MAX_VAR_RANGES]; 85 mtrr_type fixed_ranges[MTRR_NUM_FIXED_RANGES]; 86 unsigned char enabled; 87 unsigned char have_fixed; 88 mtrr_type def_type; 89 }; 90 91 #define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg)) 92 #define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1) 93 94 /* These are the various ioctls */ 95 #define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) 96 #define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) 97 #define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) 98 #define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) 99 #define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) 100 #define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) 101 #define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) 102 #define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) 103 #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) 104 #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) 105 106 /* These are the region types */ 107 #define MTRR_TYPE_UNCACHABLE 0 108 #define MTRR_TYPE_WRCOMB 1 109 /*#define MTRR_TYPE_ 2*/ 110 /*#define MTRR_TYPE_ 3*/ 111 #define MTRR_TYPE_WRTHROUGH 4 112 #define MTRR_TYPE_WRPROT 5 113 #define MTRR_TYPE_WRBACK 6 114 #define MTRR_NUM_TYPES 7 115 116 117 #endif /* _UAPI_ASM_X86_MTRR_H */ 118