David Howells | af170c5 | 2012-12-14 22:37:13 +0000 | [diff] [blame] | 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 */ |