Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [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 | */ |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 23 | #ifndef _ASM_X86_MTRR_H |
| 24 | #define _ASM_X86_MTRR_H |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 25 | |
David Howells | af170c5 | 2012-12-14 22:37:13 +0000 | [diff] [blame] | 26 | #include <uapi/asm/mtrr.h> |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 27 | |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 28 | |
Andy Lutomirski | d0d98ee | 2013-05-13 23:58:40 +0000 | [diff] [blame] | 29 | /* |
| 30 | * The following functions are for use by other drivers that cannot use |
| 31 | * arch_phys_wc_add and arch_phys_wc_del. |
| 32 | */ |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 33 | # ifdef CONFIG_MTRR |
Toshi Kani | b73522e | 2015-05-26 10:28:10 +0200 | [diff] [blame] | 34 | extern u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform); |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 35 | extern void mtrr_save_fixed_ranges(void *); |
| 36 | extern void mtrr_save_state(void); |
Joe Perches | 9969b44 | 2008-03-23 01:02:52 -0700 | [diff] [blame] | 37 | extern int mtrr_add(unsigned long base, unsigned long size, |
| 38 | unsigned int type, bool increment); |
| 39 | extern int mtrr_add_page(unsigned long base, unsigned long size, |
| 40 | unsigned int type, bool increment); |
| 41 | extern int mtrr_del(int reg, unsigned long base, unsigned long size); |
| 42 | extern int mtrr_del_page(int reg, unsigned long base, unsigned long size); |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 43 | extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi); |
| 44 | extern void mtrr_ap_init(void); |
| 45 | extern void mtrr_bp_init(void); |
Suresh Siddha | d0af9ee | 2009-08-19 18:05:36 -0700 | [diff] [blame] | 46 | extern void set_mtrr_aps_delayed_init(void); |
| 47 | extern void mtrr_aps_init(void); |
| 48 | extern void mtrr_bp_restore(void); |
Jesse Barnes | 99fc8d4 | 2008-01-30 13:33:18 +0100 | [diff] [blame] | 49 | extern int mtrr_trim_uncached_memory(unsigned long end_pfn); |
Yinghai Lu | 35605a1 | 2008-03-24 16:02:01 -0700 | [diff] [blame] | 50 | extern int amd_special_default_mtrr(void); |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 51 | # else |
Toshi Kani | b73522e | 2015-05-26 10:28:10 +0200 | [diff] [blame] | 52 | static inline u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform) |
Ingo Molnar | 52783fa | 2008-03-21 15:42:28 +0100 | [diff] [blame] | 53 | { |
| 54 | /* |
| 55 | * Return no-MTRRs: |
| 56 | */ |
Toshi Kani | 3d3ca41 | 2015-05-26 10:28:07 +0200 | [diff] [blame] | 57 | return MTRR_TYPE_INVALID; |
Ingo Molnar | 52783fa | 2008-03-21 15:42:28 +0100 | [diff] [blame] | 58 | } |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 59 | #define mtrr_save_fixed_ranges(arg) do {} while (0) |
| 60 | #define mtrr_save_state() do {} while (0) |
Joe Perches | 9969b44 | 2008-03-23 01:02:52 -0700 | [diff] [blame] | 61 | static inline int mtrr_add(unsigned long base, unsigned long size, |
| 62 | unsigned int type, bool increment) |
| 63 | { |
| 64 | return -ENODEV; |
| 65 | } |
| 66 | static inline int mtrr_add_page(unsigned long base, unsigned long size, |
Paul Jimenez | 2d2ee8d | 2008-01-30 13:30:31 +0100 | [diff] [blame] | 67 | unsigned int type, bool increment) |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 68 | { |
| 69 | return -ENODEV; |
| 70 | } |
Joe Perches | 9969b44 | 2008-03-23 01:02:52 -0700 | [diff] [blame] | 71 | static inline int mtrr_del(int reg, unsigned long base, unsigned long size) |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 72 | { |
| 73 | return -ENODEV; |
| 74 | } |
Joe Perches | 9969b44 | 2008-03-23 01:02:52 -0700 | [diff] [blame] | 75 | static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size) |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 76 | { |
| 77 | return -ENODEV; |
| 78 | } |
Jesse Barnes | 99fc8d4 | 2008-01-30 13:33:18 +0100 | [diff] [blame] | 79 | static inline int mtrr_trim_uncached_memory(unsigned long end_pfn) |
| 80 | { |
| 81 | return 0; |
| 82 | } |
Joe Perches | 9969b44 | 2008-03-23 01:02:52 -0700 | [diff] [blame] | 83 | static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) |
| 84 | { |
| 85 | } |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 86 | |
| 87 | #define mtrr_ap_init() do {} while (0) |
| 88 | #define mtrr_bp_init() do {} while (0) |
Suresh Siddha | d0af9ee | 2009-08-19 18:05:36 -0700 | [diff] [blame] | 89 | #define set_mtrr_aps_delayed_init() do {} while (0) |
| 90 | #define mtrr_aps_init() do {} while (0) |
| 91 | #define mtrr_bp_restore() do {} while (0) |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 92 | # endif |
| 93 | |
| 94 | #ifdef CONFIG_COMPAT |
| 95 | #include <linux/compat.h> |
| 96 | |
Joe Perches | 9969b44 | 2008-03-23 01:02:52 -0700 | [diff] [blame] | 97 | struct mtrr_sentry32 { |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 98 | compat_ulong_t base; /* Base address */ |
| 99 | compat_uint_t size; /* Size of region */ |
| 100 | compat_uint_t type; /* Type of region */ |
| 101 | }; |
| 102 | |
Joe Perches | 9969b44 | 2008-03-23 01:02:52 -0700 | [diff] [blame] | 103 | struct mtrr_gentry32 { |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 104 | compat_ulong_t regnum; /* Register number */ |
| 105 | compat_uint_t base; /* Base address */ |
| 106 | compat_uint_t size; /* Size of region */ |
| 107 | compat_uint_t type; /* Type of region */ |
| 108 | }; |
| 109 | |
| 110 | #define MTRR_IOCTL_BASE 'M' |
| 111 | |
Joe Perches | 9969b44 | 2008-03-23 01:02:52 -0700 | [diff] [blame] | 112 | #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) |
| 113 | #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) |
| 114 | #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) |
| 115 | #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) |
| 116 | #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) |
| 117 | #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) |
| 118 | #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) |
| 119 | #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) |
| 120 | #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) |
| 121 | #define MTRRIOC32_KILL_PAGE_ENTRY \ |
| 122 | _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) |
Thomas Gleixner | 297a99e | 2007-10-23 22:37:24 +0200 | [diff] [blame] | 123 | #endif /* CONFIG_COMPAT */ |
| 124 | |
Toshi Kani | 9b3aca6 | 2015-05-26 10:28:06 +0200 | [diff] [blame] | 125 | /* Bit fields for enabled in struct mtrr_state_type */ |
| 126 | #define MTRR_STATE_MTRR_FIXED_ENABLED 0x01 |
| 127 | #define MTRR_STATE_MTRR_ENABLED 0x02 |
| 128 | |
H. Peter Anvin | 1965aae | 2008-10-22 22:26:29 -0700 | [diff] [blame] | 129 | #endif /* _ASM_X86_MTRR_H */ |