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 _LINUX_MTRR_H 24#define _LINUX_MTRR_H 25 26#include <linux/ioctl.h> 27 28#define MTRR_IOCTL_BASE 'M' 29 30struct mtrr_sentry 31{ 32 unsigned long base; /* Base address */ 33 unsigned int size; /* Size of region */ 34 unsigned int type; /* Type of region */ 35}; 36 37/* Warning: this structure has a different order from i386 38 on x86-64. The 32bit emulation code takes care of that. 39 But you need to use this for 64bit, otherwise your X server 40 will break. */ 41struct mtrr_gentry 42{ 43 unsigned long base; /* Base address */ 44 unsigned int size; /* Size of region */ 45 unsigned int regnum; /* Register number */ 46 unsigned int type; /* Type of region */ 47}; 48 49/* These are the various ioctls */ 50#define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry) 51#define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry) 52#define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry) 53#define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry) 54#define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry) 55#define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry) 56#define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry) 57#define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry) 58#define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) 59#define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) 60 61/* These are the region types */ 62#define MTRR_TYPE_UNCACHABLE 0 63#define MTRR_TYPE_WRCOMB 1 64/*#define MTRR_TYPE_ 2*/ 65/*#define MTRR_TYPE_ 3*/ 66#define MTRR_TYPE_WRTHROUGH 4 67#define MTRR_TYPE_WRPROT 5 68#define MTRR_TYPE_WRBACK 6 69#define MTRR_NUM_TYPES 7 70 71#ifdef __KERNEL__ 72 73/* The following functions are for use by other drivers */ 74# ifdef CONFIG_MTRR 75extern int mtrr_add (unsigned long base, unsigned long size, 76 unsigned int type, char increment); 77extern int mtrr_add_page (unsigned long base, unsigned long size, 78 unsigned int type, char increment); 79extern int mtrr_del (int reg, unsigned long base, unsigned long size); 80extern int mtrr_del_page (int reg, unsigned long base, unsigned long size); 81# else 82static __inline__ int mtrr_add (unsigned long base, unsigned long size, 83 unsigned int type, char increment) 84{ 85 return -ENODEV; 86} 87static __inline__ int mtrr_add_page (unsigned long base, unsigned long size, 88 unsigned int type, char increment) 89{ 90 return -ENODEV; 91} 92static __inline__ int mtrr_del (int reg, unsigned long base, 93 unsigned long size) 94{ 95 return -ENODEV; 96} 97static __inline__ int mtrr_del_page (int reg, unsigned long base, 98 unsigned long size) 99{ 100 return -ENODEV; 101} 102 103#endif /* CONFIG_MTRR */ 104 105#ifdef CONFIG_COMPAT 106#include <linux/compat.h> 107 108struct mtrr_sentry32 109{ 110 compat_ulong_t base; /* Base address */ 111 compat_uint_t size; /* Size of region */ 112 compat_uint_t type; /* Type of region */ 113}; 114 115struct mtrr_gentry32 116{ 117 compat_ulong_t regnum; /* Register number */ 118 compat_uint_t base; /* Base address */ 119 compat_uint_t size; /* Size of region */ 120 compat_uint_t type; /* Type of region */ 121}; 122 123#define MTRR_IOCTL_BASE 'M' 124 125#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32) 126#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32) 127#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32) 128#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32) 129#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32) 130#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32) 131#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32) 132#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32) 133#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32) 134#define MTRRIOC32_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) 135 136#endif /* CONFIG_COMPAT */ 137 138#ifdef CONFIG_MTRR 139extern void mtrr_ap_init(void); 140extern void mtrr_bp_init(void); 141extern void mtrr_save_fixed_ranges(void *); 142extern void mtrr_save_state(void); 143#else 144#define mtrr_ap_init() do {} while (0) 145#define mtrr_bp_init() do {} while (0) 146#define mtrr_save_fixed_ranges(arg) do {} while (0) 147#define mtrr_save_state() do {} while (0) 148#endif 149 150#endif /* __KERNEL__ */ 151 152#endif /* _LINUX_MTRR_H */ 153