1 /* $NetBSD: mtrr.h,v 1.6 2020/01/31 08:21:11 maxv 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _X86_MTRR_H_ 33 #define _X86_MTRR_H_ 34 35 #define MTRR_I686_FIXED_IDX64K 0 36 #define MTRR_I686_FIXED_IDX16K 1 37 #define MTRR_I686_FIXED_IDX4K 3 38 39 #define MTRR_I686_NVAR_MAX 16 /* could be upto 255? */ 40 41 #define MTRR_I686_64K_START 0x00000 42 #define MTRR_I686_16K_START 0x80000 43 #define MTRR_I686_4K_START 0xc0000 44 45 #define MTRR_I686_NFIXED_64K 1 46 #define MTRR_I686_NFIXED_16K 2 47 #define MTRR_I686_NFIXED_4K 8 48 #define MTRR_I686_NFIXED 11 49 #define MTRR_I686_NFIXED_SOFT_64K (MTRR_I686_NFIXED_64K * 8) 50 #define MTRR_I686_NFIXED_SOFT_16K (MTRR_I686_NFIXED_16K * 8) 51 #define MTRR_I686_NFIXED_SOFT_4K (MTRR_I686_NFIXED_4K * 8) 52 #define MTRR_I686_NFIXED_SOFT (MTRR_I686_NFIXED * 8) 53 54 #define MTRR_I686_ENABLE_MASK 0x0800 55 #define MTRR_I686_FIXED_ENABLE_MASK 0x0400 56 57 #define MTRR_I686_CAP_VCNT_MASK 0x00ff 58 #define MTRR_I686_CAP_FIX_MASK 0x0100 59 #define MTRR_I686_CAP_WC_MASK 0x0400 60 61 #define MTRR_TYPE_UC 0 62 #define MTRR_TYPE_WC 1 63 #define MTRR_TYPE_UNDEF1 2 64 #define MTRR_TYPE_UNDEF2 3 65 #define MTRR_TYPE_WT 4 66 #define MTRR_TYPE_WP 5 67 #define MTRR_TYPE_WB 6 68 69 struct mtrr_state { 70 uint32_t msraddr; 71 uint64_t msrval; 72 }; 73 74 #define MTRR_PRIVATE 0x0001 /* 'own' range, reset at exit */ 75 #define MTRR_FIXED 0x0002 /* use fixed range mtrr */ 76 #define MTRR_VALID 0x0004 /* entry is valid */ 77 78 #define MTRR_CANTSET MTRR_FIXED 79 80 #define MTRR_I686_MASK_VALID (1 << 11) 81 82 /* 83 * AMD K6 MTRRs. 84 * 85 * There are two of these MTRR-like registers in the UWCRR. 86 */ 87 88 #define MTRR_K6_ADDR_SHIFT 17 89 #define MTRR_K6_ADDR (0x7fffU << MTRR_K6_ADDR_SHIFT) 90 #define MTRR_K6_MASK_SHIFT 2 91 #define MTRR_K6_MASK (0x7fffU << MTRR_K6_MASK_SHIFT) 92 #define MTRR_K6_WC (1U << 1) /* write-combine */ 93 #define MTRR_K6_UC (1U << 0) /* uncached */ 94 95 #define MTRR_K6_NVAR 2 96 97 #ifdef _KERNEL 98 99 #define mtrr_base_value(mtrrp) \ 100 (((uint64_t)(mtrrp)->base) | ((uint64_t)(mtrrp)->type)) 101 #define mtrr_mask_value(mtrrp) \ 102 ((~((mtrrp)->len - 1) & 0x0000000ffffff000LL)) 103 104 105 #define mtrr_len(val) \ 106 ((~((val) & 0x0000000ffffff000LL)+1) & 0x0000000ffffff000LL) 107 #define mtrr_base(val) ((val) & 0x0000000ffffff000LL) 108 #define mtrr_type(val) ((uint8_t)((val) & 0x00000000000000ffLL)) 109 #define mtrr_valid(val) (((val) & MTRR_I686_MASK_VALID) != 0) 110 111 struct proc; 112 struct mtrr; 113 114 void i686_mtrr_init_first(void); 115 void k6_mtrr_init_first(void); 116 117 struct mtrr_funcs { 118 void (*init_cpu)(struct cpu_info *ci); 119 void (*reload_cpu)(struct cpu_info *ci); 120 void (*clean)(struct proc *p); 121 int (*set)(struct mtrr *, int *n, struct proc *p, int flags); 122 int (*get)(struct mtrr *, int *n, struct proc *p, int flags); 123 void (*commit)(void); 124 void (*dump)(const char *tag); 125 }; 126 127 extern const struct mtrr_funcs i686_mtrr_funcs; 128 extern const struct mtrr_funcs k6_mtrr_funcs; 129 extern const struct mtrr_funcs *mtrr_funcs; 130 131 #define mtrr_init_cpu(ci) mtrr_funcs->init_cpu(ci) 132 #define mtrr_reload_cpu(ci) mtrr_funcs->reload_cpu(ci) 133 #define mtrr_clean(p) mtrr_funcs->clean(p) 134 #define mtrr_set(mp,n,p,f) mtrr_funcs->set(mp,n,p,f) 135 #define mtrr_get(mp,n,p,f) mtrr_funcs->get(mp,n,p,f) 136 #define mtrr_dump(s) mtrr_funcs->dump(s) 137 #define mtrr_commit() mtrr_funcs->commit() 138 139 #define MTRR_GETSET_USER 0x0001 140 #define MTRR_GETSET_KERNEL 0x0002 141 142 #endif /* _KERNEL */ 143 144 struct mtrr { 145 uint64_t base; /* physical base address */ 146 uint64_t len; 147 uint8_t type; 148 int flags; 149 pid_t owner; /* valid if MTRR_PRIVATE set in flags */ 150 }; 151 152 #endif /* _X86_MTRR_H_ */ 153