1 /* $NetBSD: mtrr.h,v 1.5 2002/10/01 12:57:07 fvdl Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Bill Sommerfeld 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _I386_MTRR_H_ 40 #define _I386_MTRR_H_ 41 42 #define MTRR_I686_FIXED_IDX64K 0 43 #define MTRR_I686_FIXED_IDX16K 1 44 #define MTRR_I686_FIXED_IDX4K 3 45 46 #define MTRR_I686_NVAR 8 47 48 #define MTRR_I686_64K_START 0x00000 49 #define MTRR_I686_16K_START 0x80000 50 #define MTRR_I686_4K_START 0xc0000 51 52 #define MTRR_I686_NFIXED_64K 1 53 #define MTRR_I686_NFIXED_16K 2 54 #define MTRR_I686_NFIXED_4K 8 55 #define MTRR_I686_NFIXED 11 56 #define MTRR_I686_NFIXED_SOFT_64K (MTRR_I686_NFIXED_64K * 8) 57 #define MTRR_I686_NFIXED_SOFT_16K (MTRR_I686_NFIXED_16K * 8) 58 #define MTRR_I686_NFIXED_SOFT_4K (MTRR_I686_NFIXED_4K * 8) 59 #define MTRR_I686_NFIXED_SOFT (MTRR_I686_NFIXED * 8) 60 61 #define MTRR_I686_ENABLE_MASK 0x0800 62 #define MTRR_I686_FIXED_ENABLE_MASK 0x0400 63 64 #define MTRR_I686_CAP_VCNT_MASK 0x00ff 65 #define MTRR_I686_CAP_FIX_MASK 0x0100 66 #define MTRR_I686_CAP_WC_MASK 0x0400 67 68 #define MTRR_TYPE_UC 0 69 #define MTRR_TYPE_WC 1 70 #define MTRR_TYPE_UNDEF1 2 71 #define MTRR_TYPE_UNDEF2 3 72 #define MTRR_TYPE_WT 4 73 #define MTRR_TYPE_WP 5 74 #define MTRR_TYPE_WB 6 75 76 struct mtrr_state { 77 uint32_t msraddr; 78 uint64_t msrval; 79 }; 80 81 #define MTRR_PRIVATE 0x0001 /* 'own' range, reset at exit */ 82 #define MTRR_FIXED 0x0002 /* use fixed range mtrr */ 83 #define MTRR_VALID 0x0004 /* entry is valid */ 84 85 #define MTRR_CANTSET MTRR_FIXED 86 87 #define MTRR_I686_MASK_VALID (1 << 11) 88 89 /* 90 * AMD K6 MTRRs. 91 * 92 * There are two of these MTRR-like registers in the UWCRR. 93 */ 94 95 #define MTRR_K6_ADDR_SHIFT 17 96 #define MTRR_K6_ADDR (0x7fffU << MTRR_K6_ADDR_SHIFT) 97 #define MTRR_K6_MASK_SHIFT 2 98 #define MTRR_K6_MASK (0x7fffU << MTRR_K6_MASK_SHIFT) 99 #define MTRR_K6_WC (1U << 1) /* write-combine */ 100 #define MTRR_K6_UC (1U << 0) /* uncached */ 101 102 #define MTRR_K6_NVAR 2 103 104 #ifdef _KERNEL 105 106 #define mtrr_base_value(mtrrp) \ 107 (((uint64_t)(mtrrp)->base) | ((uint64_t)(mtrrp)->type)) 108 #define mtrr_mask_value(mtrrp) \ 109 ((~((mtrrp)->len - 1) & 0x0000000ffffff000)) 110 111 112 #define mtrr_len(val) \ 113 ((~((val) & 0x0000000ffffff000)+1) & 0x0000000ffffff000) 114 #define mtrr_base(val) ((val) & 0x0000000ffffff000) 115 #define mtrr_type(val) ((uint8_t)((val) & 0x00000000000000ff)) 116 #define mtrr_valid(val) (((val) & MTRR_I686_MASK_VALID) != 0) 117 118 struct proc; 119 struct mtrr; 120 121 void i686_mtrr_init_first(void); 122 void k6_mtrr_init_first(void); 123 124 struct mtrr_funcs { 125 void (*init_cpu)(struct cpu_info *ci); 126 void (*reload_cpu)(struct cpu_info *ci); 127 void (*clean)(struct proc *p); 128 int (*set)(struct mtrr *, int *n, struct proc *p, int flags); 129 int (*get)(struct mtrr *, int *n, struct proc *p, int flags); 130 void (*commit)(void); 131 void (*dump)(const char *tag); 132 }; 133 134 extern struct mtrr_funcs i686_mtrr_funcs; 135 extern struct mtrr_funcs k6_mtrr_funcs; 136 extern struct mtrr_funcs *mtrr_funcs; 137 138 #define mtrr_init_cpu(ci) mtrr_funcs->init_cpu(ci) 139 #define mtrr_reload_cpu(ci) mtrr_funcs->reload_cpu(ci) 140 #define mtrr_clean(p) mtrr_funcs->clean(p) 141 #define mtrr_set(mp,n,p,f) mtrr_funcs->set(mp,n,p,f) 142 #define mtrr_get(mp,n,p,f) mtrr_funcs->get(mp,n,p,f) 143 #define mtrr_dump(s) mtrr_funcs->dump(s) 144 #define mtrr_commit() mtrr_funcs->commit() 145 146 #define MTRR_GETSET_USER 0x0001 147 #define MTRR_GETSET_KERNEL 0x0002 148 149 #endif /* _KERNEL */ 150 151 struct mtrr { 152 uint64_t base; /* physical base address */ 153 uint64_t len; 154 uint8_t type; 155 int flags; 156 pid_t owner; /* valid if MTRR_PRIVATE set in flags */ 157 }; 158 159 #endif /* _I386_MTRR_H_ */ 160