1 /* $NetBSD: cache.h,v 1.4 2002/11/09 19:34:40 thorpej Exp $ */ 2 3 /* 4 * Copyright 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Cache operations. 40 * 41 * We define the following primitives: 42 * 43 * --- Instruction cache synchronization (mandatory): 44 * 45 * icache_sync_all Synchronize I-cache 46 * 47 * icache_sync_range Synchronize I-cache range 48 * 49 * icache_sync_range_index (index ops) 50 * 51 * --- Primary data cache (mandatory): 52 * 53 * pdcache_wbinv_all Write-back Invalidate primary D-cache 54 * 55 * pdcache_wbinv_range Write-back Invalidate primary D-cache range 56 * 57 * pdcache_wbinv_range_index (index ops) 58 * 59 * pdcache_inv_range Invalidate primary D-cache range 60 * 61 * pdcache_wb_range Write-back primary D-cache range 62 * 63 * --- Secondary data cache (optional): 64 * 65 * sdcache_wbinv_all Write-back Invalidate secondary D-cache 66 * 67 * sdcache_wbinv_range Write-back Invalidate secondary D-cache range 68 * 69 * sdcache_wbinv_range_index (index ops) 70 * 71 * sdcache_inv_range Invalidate secondary D-cache range 72 * 73 * sdcache_wb_range Write-back secondary D-cache range 74 * 75 * There are some rules that must be followed: 76 * 77 * I-cache Synch (all or range): 78 * The goal is to synchronize the instruction stream, 79 * so you may need to write-back dirty data cache 80 * blocks first. If a range is requested, and you 81 * can't synchronize just a range, you have to hit 82 * the whole thing. 83 * 84 * D-cache Write-back Invalidate range: 85 * If you can't WB-Inv a range, you must WB-Inv the 86 * entire D-cache. 87 * 88 * D-cache Invalidate: 89 * If you can't Inv the D-cache without doing a 90 * Write-back, YOU MUST PANIC. This is to catch 91 * errors in calling code. Callers must be aware 92 * of this scenario, and must handle it appropriately 93 * (consider the bus_dma(9) operations). 94 * 95 * D-cache Write-back: 96 * If you can't Write-back without doing an invalidate, 97 * that's fine. Then treat this as a WB-Inv. Skipping 98 * the invalidate is merely an optimization. 99 * 100 * All operations: 101 * Valid virtual addresses must be passed to the 102 * cache operation. 103 * 104 * Finally, these primitives are grouped together in reasonable 105 * ways. For all operations described here, first the primary 106 * cache is frobbed, then the secondary cache frobbed, if the 107 * operation for the secondary cache exists. 108 * 109 * mips_icache_sync_all Synchronize I-cache 110 * 111 * mips_icache_sync_range Synchronize I-cache range 112 * 113 * mips_icache_sync_range_index (index ops) 114 * 115 * mips_dcache_wbinv_all Write-back Invalidate D-cache 116 * 117 * mips_dcache_wbinv_range Write-back Invalidate D-cache range 118 * 119 * mips_dcache_wbinv_range_index (index ops) 120 * 121 * mips_dcache_inv_range Invalidate D-cache range 122 * 123 * mips_dcache_wb_range Write-back D-cache range 124 */ 125 126 struct mips_cache_ops { 127 void (*mco_icache_sync_all)(void); 128 void (*mco_icache_sync_range)(vaddr_t, vsize_t); 129 void (*mco_icache_sync_range_index)(vaddr_t, vsize_t); 130 131 void (*mco_pdcache_wbinv_all)(void); 132 void (*mco_pdcache_wbinv_range)(vaddr_t, vsize_t); 133 void (*mco_pdcache_wbinv_range_index)(vaddr_t, vsize_t); 134 void (*mco_pdcache_inv_range)(vaddr_t, vsize_t); 135 void (*mco_pdcache_wb_range)(vaddr_t, vsize_t); 136 137 void (*mco_sdcache_wbinv_all)(void); 138 void (*mco_sdcache_wbinv_range)(vaddr_t, vsize_t); 139 void (*mco_sdcache_wbinv_range_index)(vaddr_t, vsize_t); 140 void (*mco_sdcache_inv_range)(vaddr_t, vsize_t); 141 void (*mco_sdcache_wb_range)(vaddr_t, vsize_t); 142 }; 143 144 #ifdef _KERNEL 145 extern struct mips_cache_ops mips_cache_ops; 146 147 /* PRIMARY CACHE VARIABLES */ 148 extern u_int mips_picache_size; 149 extern u_int mips_picache_line_size; 150 extern u_int mips_picache_ways; 151 extern u_int mips_picache_way_size; 152 extern u_int mips_picache_way_mask; 153 154 extern u_int mips_pdcache_size; /* and unified */ 155 extern u_int mips_pdcache_line_size; 156 extern u_int mips_pdcache_ways; 157 extern u_int mips_pdcache_way_size; 158 extern u_int mips_pdcache_way_mask; 159 extern int mips_pdcache_write_through; 160 161 extern int mips_pcache_unified; 162 163 /* SECONDARY CACHE VARIABLES */ 164 extern u_int mips_sicache_size; 165 extern u_int mips_sicache_line_size; 166 extern u_int mips_sicache_ways; 167 extern u_int mips_sicache_way_size; 168 extern u_int mips_sicache_way_mask; 169 170 extern u_int mips_sdcache_size; /* and unified */ 171 extern u_int mips_sdcache_line_size; 172 extern u_int mips_sdcache_ways; 173 extern u_int mips_sdcache_way_size; 174 extern u_int mips_sdcache_way_mask; 175 extern int mips_sdcache_write_through; 176 177 extern int mips_scache_unified; 178 179 /* TERTIARY CACHE VARIABLES */ 180 extern u_int mips_tcache_size; /* always unified */ 181 extern u_int mips_tcache_line_size; 182 extern u_int mips_tcache_ways; 183 extern u_int mips_tcache_way_size; 184 extern u_int mips_tcache_way_mask; 185 extern int mips_tcache_write_through; 186 187 extern u_int mips_dcache_align; 188 extern u_int mips_dcache_align_mask; 189 190 extern u_int mips_cache_alias_mask; 191 extern u_int mips_cache_prefer_mask; 192 193 /* 194 * XXX XXX XXX THIS SHOULD NOT EXIST XXX XXX XXX 195 */ 196 #define mips_cache_indexof(x) (((vaddr_t)(x)) & mips_cache_alias_mask) 197 198 #define __mco_noargs(x) \ 199 do { \ 200 (*mips_cache_ops.mco_p ## x )(); \ 201 if (*mips_cache_ops.mco_s ## x ) \ 202 (*mips_cache_ops.mco_s ## x )(); \ 203 } while (/*CONSTCOND*/0) 204 205 #define __mco_2args(x, a, b) \ 206 do { \ 207 (*mips_cache_ops.mco_p ## x )((a), (b)); \ 208 if (*mips_cache_ops.mco_s ## x ) \ 209 (*mips_cache_ops.mco_s ## x )((a), (b)); \ 210 } while (/*CONSTCOND*/0) 211 212 #define mips_icache_sync_all() \ 213 (*mips_cache_ops.mco_icache_sync_all)() 214 215 #define mips_icache_sync_range(v, s) \ 216 (*mips_cache_ops.mco_icache_sync_range)((v), (s)) 217 218 #define mips_icache_sync_range_index(v, s) \ 219 (*mips_cache_ops.mco_icache_sync_range_index)((v), (s)) 220 221 #define mips_dcache_wbinv_all() \ 222 __mco_noargs(dcache_wbinv_all) 223 224 #define mips_dcache_wbinv_range(v, s) \ 225 __mco_2args(dcache_wbinv_range, (v), (s)) 226 227 #define mips_dcache_wbinv_range_index(v, s) \ 228 __mco_2args(dcache_wbinv_range_index, (v), (s)) 229 230 #define mips_dcache_inv_range(v, s) \ 231 __mco_2args(dcache_inv_range, (v), (s)) 232 233 #define mips_dcache_wb_range(v, s) \ 234 __mco_2args(dcache_wb_range, (v), (s)) 235 236 void mips_config_cache(void); 237 void mips_dcache_compute_align(void); 238 239 #endif /* _KERNEL */ 240