cpu.c revision 1.2.2.4
1 1.2.2.4 jdolecek /* $NetBSD: cpu.c,v 1.2.2.4 2002/09/06 08:39:02 jdolecek Exp $ */ 2 1.2.2.2 jdolecek 3 1.2.2.2 jdolecek /* 4 1.2.2.2 jdolecek * Copyright 2001 Wasabi Systems, Inc. 5 1.2.2.2 jdolecek * All rights reserved. 6 1.2.2.2 jdolecek * 7 1.2.2.2 jdolecek * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. 8 1.2.2.2 jdolecek * 9 1.2.2.2 jdolecek * Redistribution and use in source and binary forms, with or without 10 1.2.2.2 jdolecek * modification, are permitted provided that the following conditions 11 1.2.2.2 jdolecek * are met: 12 1.2.2.2 jdolecek * 1. Redistributions of source code must retain the above copyright 13 1.2.2.2 jdolecek * notice, this list of conditions and the following disclaimer. 14 1.2.2.2 jdolecek * 2. Redistributions in binary form must reproduce the above copyright 15 1.2.2.2 jdolecek * notice, this list of conditions and the following disclaimer in the 16 1.2.2.2 jdolecek * documentation and/or other materials provided with the distribution. 17 1.2.2.2 jdolecek * 3. All advertising materials mentioning features or use of this software 18 1.2.2.2 jdolecek * must display the following acknowledgement: 19 1.2.2.2 jdolecek * This product includes software developed for the NetBSD Project by 20 1.2.2.2 jdolecek * Wasabi Systems, Inc. 21 1.2.2.2 jdolecek * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 1.2.2.2 jdolecek * or promote products derived from this software without specific prior 23 1.2.2.2 jdolecek * written permission. 24 1.2.2.2 jdolecek * 25 1.2.2.2 jdolecek * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 1.2.2.2 jdolecek * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 1.2.2.2 jdolecek * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 1.2.2.2 jdolecek * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 1.2.2.2 jdolecek * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 1.2.2.2 jdolecek * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 1.2.2.2 jdolecek * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 1.2.2.2 jdolecek * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 1.2.2.2 jdolecek * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 1.2.2.2 jdolecek * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 1.2.2.2 jdolecek * POSSIBILITY OF SUCH DAMAGE. 36 1.2.2.2 jdolecek */ 37 1.2.2.2 jdolecek 38 1.2.2.2 jdolecek #include <sys/param.h> 39 1.2.2.2 jdolecek #include <sys/systm.h> 40 1.2.2.2 jdolecek #include <sys/device.h> 41 1.2.2.3 jdolecek #include <sys/properties.h> 42 1.2.2.2 jdolecek 43 1.2.2.3 jdolecek #include <machine/cpu.h> 44 1.2.2.4 jdolecek #include <powerpc/ibm4xx/dev/plbvar.h> 45 1.2.2.2 jdolecek 46 1.2.2.2 jdolecek struct cputab { 47 1.2.2.2 jdolecek int version; 48 1.2.2.2 jdolecek char *name; 49 1.2.2.2 jdolecek }; 50 1.2.2.2 jdolecek static struct cputab models[] = { 51 1.2.2.2 jdolecek { PVR_401A1 >> 16, "401A1" }, 52 1.2.2.2 jdolecek { PVR_401B2 >> 16, "401B21" }, 53 1.2.2.2 jdolecek { PVR_401C2 >> 16, "401C2" }, 54 1.2.2.2 jdolecek { PVR_401D2 >> 16, "401D2" }, 55 1.2.2.2 jdolecek { PVR_401E2 >> 16, "401E2" }, 56 1.2.2.2 jdolecek { PVR_401F2 >> 16, "401F2" }, 57 1.2.2.2 jdolecek { PVR_401G2 >> 16, "401G2" }, 58 1.2.2.2 jdolecek { PVR_403 >> 16, "403" }, 59 1.2.2.2 jdolecek { PVR_405GP >> 16, "405GP" }, 60 1.2.2.2 jdolecek { 0, NULL } 61 1.2.2.2 jdolecek }; 62 1.2.2.2 jdolecek 63 1.2.2.2 jdolecek static int cpumatch(struct device *, struct cfdata *, void *); 64 1.2.2.2 jdolecek static void cpuattach(struct device *, struct device *, void *); 65 1.2.2.2 jdolecek 66 1.2.2.2 jdolecek struct cfattach cpu_ca = { 67 1.2.2.2 jdolecek sizeof(struct device), cpumatch, cpuattach 68 1.2.2.2 jdolecek }; 69 1.2.2.2 jdolecek 70 1.2.2.2 jdolecek int ncpus; 71 1.2.2.2 jdolecek 72 1.2.2.2 jdolecek struct cpu_info cpu_info_store; 73 1.2.2.2 jdolecek 74 1.2.2.2 jdolecek int cpufound = 0; 75 1.2.2.2 jdolecek 76 1.2.2.2 jdolecek static int 77 1.2.2.2 jdolecek cpumatch(struct device *parent, struct cfdata *cf, void *aux) 78 1.2.2.2 jdolecek { 79 1.2.2.4 jdolecek struct plb_attach_args *paa = aux; 80 1.2.2.2 jdolecek 81 1.2.2.2 jdolecek /* make sure that we're looking for a CPU */ 82 1.2.2.4 jdolecek if (strcmp(paa->plb_name, cf->cf_driver->cd_name) != 0) 83 1.2.2.4 jdolecek return (0); 84 1.2.2.2 jdolecek 85 1.2.2.2 jdolecek return !cpufound; 86 1.2.2.2 jdolecek } 87 1.2.2.2 jdolecek 88 1.2.2.2 jdolecek static void 89 1.2.2.2 jdolecek cpuattach(struct device *parent, struct device *self, void *aux) 90 1.2.2.2 jdolecek { 91 1.2.2.2 jdolecek int pvr, cpu; 92 1.2.2.2 jdolecek int own, pcf, cas, pcl, aid; 93 1.2.2.2 jdolecek struct cputab *cp = models; 94 1.2.2.3 jdolecek unsigned int processor_freq; 95 1.2.2.3 jdolecek 96 1.2.2.4 jdolecek if (board_info_get("processor-frequency", 97 1.2.2.3 jdolecek &processor_freq, sizeof(processor_freq)) == -1) 98 1.2.2.3 jdolecek panic("no processor-frequency"); 99 1.2.2.2 jdolecek 100 1.2.2.2 jdolecek cpufound++; 101 1.2.2.2 jdolecek ncpus++; 102 1.2.2.2 jdolecek 103 1.2.2.2 jdolecek asm ("mfpvr %0" : "=r"(pvr)); 104 1.2.2.2 jdolecek cpu = pvr >> 16; 105 1.2.2.2 jdolecek 106 1.2.2.2 jdolecek /* Break PVR up into separate fields and print them out. */ 107 1.2.2.2 jdolecek own = (pvr >> 20) & 0xfff; 108 1.2.2.2 jdolecek pcf = (pvr >> 16) & 0xf; 109 1.2.2.2 jdolecek cas = (pvr >> 10) & 0x3f; 110 1.2.2.2 jdolecek pcl = (pvr >> 6) & 0xf; 111 1.2.2.2 jdolecek aid = pvr & 0x3f; 112 1.2.2.2 jdolecek 113 1.2.2.2 jdolecek while (cp->name) { 114 1.2.2.2 jdolecek if (cp->version == cpu) 115 1.2.2.2 jdolecek break; 116 1.2.2.2 jdolecek cp++; 117 1.2.2.2 jdolecek } 118 1.2.2.2 jdolecek if (cp->name) 119 1.2.2.2 jdolecek strcpy(cpu_model, cp->name); 120 1.2.2.2 jdolecek else 121 1.2.2.2 jdolecek sprintf(cpu_model, "Version 0x%x", cpu); 122 1.2.2.2 jdolecek sprintf(cpu_model + strlen(cpu_model), " (Revision %d.%d)", 123 1.2.2.2 jdolecek (pvr >> 8) & 0xff, pvr & 0xff); 124 1.2.2.2 jdolecek 125 1.2.2.2 jdolecek #if 1 126 1.2.2.3 jdolecek printf(": %dMHz %s\n", processor_freq / 1000 / 1000, 127 1.2.2.2 jdolecek cpu_model); 128 1.2.2.2 jdolecek #endif 129 1.2.2.2 jdolecek 130 1.2.2.2 jdolecek cpu_probe_cache(); 131 1.2.2.2 jdolecek 132 1.2.2.4 jdolecek printf("Instruction cache size %d line size %d\n", 133 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size, curcpu()->ci_ci.icache_line_size); 134 1.2.2.4 jdolecek printf("Data cache size %d line size %d\n", 135 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size, curcpu()->ci_ci.dcache_line_size); 136 1.2.2.2 jdolecek 137 1.2.2.2 jdolecek #ifdef DEBUG 138 1.2.2.2 jdolecek /* It sux that the cache info here is useless. */ 139 1.2.2.2 jdolecek printf("PVR: owner %x core family %x cache %x version %x asic %x\n", 140 1.2.2.2 jdolecek own, pcf, cas, pcl, aid); 141 1.2.2.2 jdolecek #endif 142 1.2.2.2 jdolecek } 143 1.2.2.2 jdolecek 144 1.2.2.2 jdolecek /* 145 1.2.2.4 jdolecek * This routine must be explicitly called to initialize the 146 1.2.2.4 jdolecek * CPU cache information so cache flushe and memcpy operation 147 1.2.2.2 jdolecek * work. 148 1.2.2.2 jdolecek */ 149 1.2.2.2 jdolecek void 150 1.2.2.2 jdolecek cpu_probe_cache() 151 1.2.2.2 jdolecek { 152 1.2.2.2 jdolecek int version; 153 1.2.2.2 jdolecek 154 1.2.2.2 jdolecek /* 155 1.2.2.4 jdolecek * First we need to identify the cpu and determine the 156 1.2.2.2 jdolecek * cache line size, or things like memset/memcpy may lose 157 1.2.2.2 jdolecek * badly. 158 1.2.2.2 jdolecek */ 159 1.2.2.2 jdolecek __asm __volatile("mfpvr %0" : "=r" (version)); 160 1.2.2.2 jdolecek switch (version & 0xffff0000) { 161 1.2.2.2 jdolecek case PVR_401A1: 162 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size = 1024; 163 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 16; 164 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size = 2848; 165 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 16; 166 1.2.2.2 jdolecek break; 167 1.2.2.2 jdolecek case PVR_401B2: 168 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size = 8192; 169 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 16; 170 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size = 16384; 171 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 16; 172 1.2.2.2 jdolecek break; 173 1.2.2.2 jdolecek case PVR_401C2: 174 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size = 8192; 175 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 16; 176 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size = 0; 177 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 16; 178 1.2.2.2 jdolecek break; 179 1.2.2.2 jdolecek case PVR_401D2: 180 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size = 2848; 181 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 16; 182 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size = 4096; 183 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 16; 184 1.2.2.2 jdolecek break; 185 1.2.2.2 jdolecek case PVR_401E2: 186 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size = 0; 187 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 16; 188 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size = 0; 189 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 16; 190 1.2.2.2 jdolecek break; 191 1.2.2.2 jdolecek case PVR_401F2: 192 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size = 2048; 193 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 16; 194 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size = 2848; 195 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 16; 196 1.2.2.2 jdolecek break; 197 1.2.2.2 jdolecek case PVR_401G2: 198 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size = 2848; 199 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 16; 200 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size = 8192; 201 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 16; 202 1.2.2.2 jdolecek break; 203 1.2.2.2 jdolecek case PVR_403: 204 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 16; 205 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 16; 206 1.2.2.2 jdolecek break; 207 1.2.2.2 jdolecek case PVR_405GP: 208 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_size = 8192; 209 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 32; 210 1.2.2.2 jdolecek curcpu()->ci_ci.icache_size = 8192; 211 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 32; 212 1.2.2.2 jdolecek break; 213 1.2.2.2 jdolecek default: 214 1.2.2.4 jdolecek /* 215 1.2.2.4 jdolecek * Unknown CPU type. For safety we'll specify a 216 1.2.2.4 jdolecek * cache with a 4-byte line size. That way cache 217 1.2.2.2 jdolecek * flush routines won't miss any lines. 218 1.2.2.2 jdolecek */ 219 1.2.2.2 jdolecek curcpu()->ci_ci.dcache_line_size = 4; 220 1.2.2.2 jdolecek curcpu()->ci_ci.icache_line_size = 4; 221 1.2.2.2 jdolecek break; 222 1.2.2.2 jdolecek } 223 1.2.2.2 jdolecek 224 1.2.2.2 jdolecek } 225 1.2.2.2 jdolecek 226 1.2.2.2 jdolecek /* 227 1.2.2.2 jdolecek * These small routines may have to be replaced, 228 1.2.2.2 jdolecek * if/when we support processors other that the 604. 229 1.2.2.2 jdolecek */ 230 1.2.2.2 jdolecek 231 1.2.2.2 jdolecek void 232 1.2.2.2 jdolecek dcache_flush_page(vaddr_t va) 233 1.2.2.2 jdolecek { 234 1.2.2.2 jdolecek int i; 235 1.2.2.2 jdolecek 236 1.2.2.2 jdolecek if (curcpu()->ci_ci.dcache_line_size) 237 1.2.2.2 jdolecek for (i = 0; i < NBPG; i += curcpu()->ci_ci.dcache_line_size) 238 1.2.2.2 jdolecek asm volatile("dcbf %0,%1" : : "r" (va), "r" (i)); 239 1.2.2.2 jdolecek asm volatile("sync;isync" : : ); 240 1.2.2.2 jdolecek } 241 1.2.2.2 jdolecek 242 1.2.2.2 jdolecek void 243 1.2.2.2 jdolecek icache_flush_page(vaddr_t va) 244 1.2.2.2 jdolecek { 245 1.2.2.2 jdolecek int i; 246 1.2.2.2 jdolecek 247 1.2.2.2 jdolecek if (curcpu()->ci_ci.icache_line_size) 248 1.2.2.2 jdolecek for (i = 0; i < NBPG; i += curcpu()->ci_ci.icache_line_size) 249 1.2.2.2 jdolecek asm volatile("icbi %0,%1" : : "r" (va), "r" (i)); 250 1.2.2.2 jdolecek asm volatile("sync;isync" : : ); 251 1.2.2.2 jdolecek } 252 1.2.2.2 jdolecek 253 1.2.2.2 jdolecek void 254 1.2.2.2 jdolecek dcache_flush(vaddr_t va, vsize_t len) 255 1.2.2.2 jdolecek { 256 1.2.2.2 jdolecek int i; 257 1.2.2.2 jdolecek 258 1.2.2.2 jdolecek if (len == 0) 259 1.2.2.2 jdolecek return; 260 1.2.2.2 jdolecek 261 1.2.2.2 jdolecek /* Make sure we flush all cache lines */ 262 1.2.2.2 jdolecek len += va & (curcpu()->ci_ci.dcache_line_size-1); 263 1.2.2.2 jdolecek if (curcpu()->ci_ci.dcache_line_size) 264 1.2.2.2 jdolecek for (i = 0; i < len; i += curcpu()->ci_ci.dcache_line_size) 265 1.2.2.2 jdolecek asm volatile("dcbf %0,%1" : : "r" (va), "r" (i)); 266 1.2.2.2 jdolecek asm volatile("sync;isync" : : ); 267 1.2.2.2 jdolecek } 268 1.2.2.2 jdolecek 269 1.2.2.2 jdolecek void 270 1.2.2.2 jdolecek icache_flush(vaddr_t va, vsize_t len) 271 1.2.2.2 jdolecek { 272 1.2.2.2 jdolecek int i; 273 1.2.2.2 jdolecek 274 1.2.2.2 jdolecek if (len == 0) 275 1.2.2.2 jdolecek return; 276 1.2.2.2 jdolecek 277 1.2.2.2 jdolecek /* Make sure we flush all cache lines */ 278 1.2.2.2 jdolecek len += va & (curcpu()->ci_ci.icache_line_size-1); 279 1.2.2.2 jdolecek if (curcpu()->ci_ci.icache_line_size) 280 1.2.2.2 jdolecek for (i = 0; i < len; i += curcpu()->ci_ci.icache_line_size) 281 1.2.2.2 jdolecek asm volatile("icbi %0,%1" : : "r" (va), "r" (i)); 282 1.2.2.2 jdolecek asm volatile("sync;isync" : : ); 283 1.2.2.2 jdolecek } 284
Indexes created Tue Sep 30 20:09:53 GMT 2025