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#include <asm/memtype.h> 28 29 30/* 31 * The following functions are for use by other drivers that cannot use 32 * arch_phys_wc_add and arch_phys_wc_del. 33 */ 34# ifdef CONFIG_MTRR 35extern u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform); 36extern void mtrr_save_fixed_ranges(void *); 37extern void mtrr_save_state(void); 38extern int mtrr_add(unsigned long base, unsigned long size, 39 unsigned int type, bool increment); 40extern int mtrr_add_page(unsigned long base, unsigned long size, 41 unsigned int type, bool increment); 42extern int mtrr_del(int reg, unsigned long base, unsigned long size); 43extern int mtrr_del_page(int reg, unsigned long base, unsigned long size); 44extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi); 45extern void mtrr_ap_init(void); 46extern void mtrr_bp_init(void); 47extern void set_mtrr_aps_delayed_init(void); 48extern void mtrr_aps_init(void); 49extern void mtrr_bp_restore(void); 50extern int mtrr_trim_uncached_memory(unsigned long end_pfn); 51extern int amd_special_default_mtrr(void); 52# else 53static inline u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform) 54{ 55 /* 56 * Return no-MTRRs: 57 */ 58 return MTRR_TYPE_INVALID; 59} 60#define mtrr_save_fixed_ranges(arg) do {} while (0) 61#define mtrr_save_state() do {} while (0) 62static inline int mtrr_add(unsigned long base, unsigned long size, 63 unsigned int type, bool increment) 64{ 65 return -ENODEV; 66} 67static inline int mtrr_add_page(unsigned long base, unsigned long size, 68 unsigned int type, bool increment) 69{ 70 return -ENODEV; 71} 72static inline int mtrr_del(int reg, unsigned long base, unsigned long size) 73{ 74 return -ENODEV; 75} 76static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size) 77{ 78 return -ENODEV; 79} 80static inline int mtrr_trim_uncached_memory(unsigned long end_pfn) 81{ 82 return 0; 83} 84static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) 85{ 86} 87static inline void mtrr_bp_init(void) 88{ 89 pat_disable("PAT support disabled because CONFIG_MTRR is disabled in the kernel."); 90} 91 92#define mtrr_ap_init() do {} while (0) 93#define set_mtrr_aps_delayed_init() do {} while (0) 94#define mtrr_aps_init() do {} while (0) 95#define mtrr_bp_restore() do {} while (0) 96# endif 97 98#ifdef CONFIG_COMPAT 99#include <linux/compat.h> 100 101struct mtrr_sentry32 { 102 compat_ulong_t base; /* Base address */ 103 compat_uint_t size; /* Size of region */ 104 compat_uint_t type; /* Type of region */ 105}; 106 107struct mtrr_gentry32 { 108 compat_ulong_t regnum; /* Register number */ 109 compat_uint_t base; /* Base address */ 110 compat_uint_t size; /* Size of region */ 111 compat_uint_t type; /* Type of region */ 112}; 113 114#define MTRR_IOCTL_BASE 'M' 115 116#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) 117#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) 118#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) 119#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) 120#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) 121#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) 122#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) 123#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) 124#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) 125#define MTRRIOC32_KILL_PAGE_ENTRY \ 126 _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) 127#endif /* CONFIG_COMPAT */ 128 129/* Bit fields for enabled in struct mtrr_state_type */ 130#define MTRR_STATE_MTRR_FIXED_ENABLED 0x01 131#define MTRR_STATE_MTRR_ENABLED 0x02 132 133#endif /* _ASM_X86_MTRR_H */ 134