| 1 | /* $NetBSD: mtrr.h,v 1.5 2011/12/15 09:38:21 abs 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 struct mtrr_funcs i686_mtrr_funcs; |
| 128 | extern struct mtrr_funcs k6_mtrr_funcs; |
| 129 | extern 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 | |