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 _ASM_X86_MTRR_H 24 #define _ASM_X86_MTRR_H 25 26 #include <uapi/asm/mtrr.h> 27 28 29 /* The following functions are for use by other drivers */ 30 # ifdef CONFIG_MTRR 31 extern u8 mtrr_type_lookup(u64 addr, u64 end); 32 extern void mtrr_save_fixed_ranges(void *); 33 extern void mtrr_save_state(void); 34 extern int mtrr_add(unsigned long base, unsigned long size, 35 unsigned int type, bool increment); 36 extern int mtrr_add_page(unsigned long base, unsigned long size, 37 unsigned int type, bool increment); 38 extern int mtrr_del(int reg, unsigned long base, unsigned long size); 39 extern int mtrr_del_page(int reg, unsigned long base, unsigned long size); 40 extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi); 41 extern void mtrr_ap_init(void); 42 extern void mtrr_bp_init(void); 43 extern void set_mtrr_aps_delayed_init(void); 44 extern void mtrr_aps_init(void); 45 extern void mtrr_bp_restore(void); 46 extern int mtrr_trim_uncached_memory(unsigned long end_pfn); 47 extern int amd_special_default_mtrr(void); 48 # else 49 static inline u8 mtrr_type_lookup(u64 addr, u64 end) 50 { 51 /* 52 * Return no-MTRRs: 53 */ 54 return 0xff; 55 } 56 #define mtrr_save_fixed_ranges(arg) do {} while (0) 57 #define mtrr_save_state() do {} while (0) 58 static inline int mtrr_add(unsigned long base, unsigned long size, 59 unsigned int type, bool increment) 60 { 61 return -ENODEV; 62 } 63 static inline int mtrr_add_page(unsigned long base, unsigned long size, 64 unsigned int type, bool increment) 65 { 66 return -ENODEV; 67 } 68 static inline int mtrr_del(int reg, unsigned long base, unsigned long size) 69 { 70 return -ENODEV; 71 } 72 static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size) 73 { 74 return -ENODEV; 75 } 76 static inline int mtrr_trim_uncached_memory(unsigned long end_pfn) 77 { 78 return 0; 79 } 80 static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) 81 { 82 } 83 84 #define mtrr_ap_init() do {} while (0) 85 #define mtrr_bp_init() do {} while (0) 86 #define set_mtrr_aps_delayed_init() do {} while (0) 87 #define mtrr_aps_init() do {} while (0) 88 #define mtrr_bp_restore() do {} while (0) 89 # endif 90 91 #ifdef CONFIG_COMPAT 92 #include <linux/compat.h> 93 94 struct mtrr_sentry32 { 95 compat_ulong_t base; /* Base address */ 96 compat_uint_t size; /* Size of region */ 97 compat_uint_t type; /* Type of region */ 98 }; 99 100 struct mtrr_gentry32 { 101 compat_ulong_t regnum; /* Register number */ 102 compat_uint_t base; /* Base address */ 103 compat_uint_t size; /* Size of region */ 104 compat_uint_t type; /* Type of region */ 105 }; 106 107 #define MTRR_IOCTL_BASE 'M' 108 109 #define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) 110 #define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) 111 #define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) 112 #define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) 113 #define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) 114 #define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) 115 #define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) 116 #define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) 117 #define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) 118 #define MTRRIOC32_KILL_PAGE_ENTRY \ 119 _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) 120 #endif /* CONFIG_COMPAT */ 121 122 #endif /* _ASM_X86_MTRR_H */ 123