1 /* $NetBSD: cpu.c,v 1.55 2004/02/13 11:36:10 wiz Exp $ */ 2 3 /*- 4 * Copyright (c) 1995 Mark Brinicombe. 5 * Copyright (c) 1995 Brini. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Brini. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * RiscBSD kernel project 36 * 37 * cpu.c 38 * 39 * Probing and configuration for the master CPU 40 * 41 * Created : 10/10/95 42 */ 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/conf.h> 49 #include <sys/kernel.h> 50 #include <sys/sysctl.h> 51 #include <machine/cpu.h> 52 #include <machine/md_var.h> 53 54 char machine[] = "arm"; 55 56 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD | CTLFLAG_CAPRD, 57 machine, 0, "Machine class"); 58 59 static char cpu_model[64]; 60 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, 61 cpu_model, sizeof(cpu_model), "Machine model"); 62 63 static char hw_buf[81]; 64 static int hw_buf_idx; 65 static bool hw_buf_newline; 66 67 enum cpu_class cpu_class = CPU_CLASS_NONE; 68 69 static struct { 70 int implementer; 71 int part_number; 72 char *impl_name; 73 char *core_name; 74 enum cpu_class cpu_class; 75 } cpu_names[] = { 76 {CPU_IMPLEMENTER_ARM, CPU_ARCH_ARM1176, "ARM", "ARM1176", 77 CPU_CLASS_ARM11J}, 78 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A5 , "ARM", "Cortex-A5", 79 CPU_CLASS_CORTEXA}, 80 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A7 , "ARM", "Cortex-A7", 81 CPU_CLASS_CORTEXA}, 82 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A8 , "ARM", "Cortex-A8", 83 CPU_CLASS_CORTEXA}, 84 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A9 , "ARM", "Cortex-A9", 85 CPU_CLASS_CORTEXA}, 86 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A12, "ARM", "Cortex-A12", 87 CPU_CLASS_CORTEXA}, 88 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A15, "ARM", "Cortex-A15", 89 CPU_CLASS_CORTEXA}, 90 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A17, "ARM", "Cortex-A17", 91 CPU_CLASS_CORTEXA}, 92 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A53, "ARM", "Cortex-A53", 93 CPU_CLASS_CORTEXA}, 94 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A57, "ARM", "Cortex-A57", 95 CPU_CLASS_CORTEXA}, 96 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A72, "ARM", "Cortex-A72", 97 CPU_CLASS_CORTEXA}, 98 {CPU_IMPLEMENTER_ARM, CPU_ARCH_CORTEX_A73, "ARM", "Cortex-A73", 99 CPU_CLASS_CORTEXA}, 100 101 {CPU_IMPLEMENTER_MRVL, CPU_ARCH_SHEEVA_581, "Marvell", "PJ4 v7", 102 CPU_CLASS_MARVELL}, 103 {CPU_IMPLEMENTER_MRVL, CPU_ARCH_SHEEVA_584, "Marvell", "PJ4MP v7", 104 CPU_CLASS_MARVELL}, 105 106 {CPU_IMPLEMENTER_QCOM, CPU_ARCH_KRAIT_300, "Qualcomm", "Krait 300", 107 CPU_CLASS_KRAIT}, 108 }; 109 110 static void 111 print_v5_cache(void) 112 { 113 uint32_t isize, dsize; 114 uint32_t multiplier; 115 int pcache_type; 116 int pcache_unified; 117 int picache_size; 118 int picache_line_size; 119 int picache_ways; 120 int pdcache_size; 121 int pdcache_line_size; 122 int pdcache_ways; 123 124 pcache_unified = 0; 125 picache_size = 0 ; 126 picache_line_size = 0 ; 127 picache_ways = 0 ; 128 pdcache_size = 0; 129 pdcache_line_size = 0; 130 pdcache_ways = 0; 131 132 if ((cpuinfo.ctr & CPU_CT_S) == 0) 133 pcache_unified = 1; 134 135 /* 136 * If you want to know how this code works, go read the ARM ARM. 137 */ 138 pcache_type = CPU_CT_CTYPE(cpuinfo.ctr); 139 140 if (pcache_unified == 0) { 141 isize = CPU_CT_ISIZE(cpuinfo.ctr); 142 multiplier = (isize & CPU_CT_xSIZE_M) ? 3 : 2; 143 picache_line_size = 1U << (CPU_CT_xSIZE_LEN(isize) + 3); 144 if (CPU_CT_xSIZE_ASSOC(isize) == 0) { 145 if (isize & CPU_CT_xSIZE_M) 146 picache_line_size = 0; /* not present */ 147 else 148 picache_ways = 1; 149 } else { 150 picache_ways = multiplier << 151 (CPU_CT_xSIZE_ASSOC(isize) - 1); 152 } 153 picache_size = multiplier << (CPU_CT_xSIZE_SIZE(isize) + 8); 154 } 155 156 dsize = CPU_CT_DSIZE(cpuinfo.ctr); 157 multiplier = (dsize & CPU_CT_xSIZE_M) ? 3 : 2; 158 pdcache_line_size = 1U << (CPU_CT_xSIZE_LEN(dsize) + 3); 159 if (CPU_CT_xSIZE_ASSOC(dsize) == 0) { 160 if (dsize & CPU_CT_xSIZE_M) 161 pdcache_line_size = 0; /* not present */ 162 else 163 pdcache_ways = 1; 164 } else { 165 pdcache_ways = multiplier << 166 (CPU_CT_xSIZE_ASSOC(dsize) - 1); 167 } 168 pdcache_size = multiplier << (CPU_CT_xSIZE_SIZE(dsize) + 8); 169 170 /* Print cache info. */ 171 if (picache_line_size == 0 && pdcache_line_size == 0) 172 return; 173 174 if (pcache_unified) { 175 printf(" %dKB/%dB %d-way %s unified cache\n", 176 pdcache_size / 1024, 177 pdcache_line_size, pdcache_ways, 178 pcache_type == 0 ? "WT" : "WB"); 179 } else { 180 printf(" %dKB/%dB %d-way instruction cache\n", 181 picache_size / 1024, 182 picache_line_size, picache_ways); 183 printf(" %dKB/%dB %d-way %s data cache\n", 184 pdcache_size / 1024, 185 pdcache_line_size, pdcache_ways, 186 pcache_type == 0 ? "WT" : "WB"); 187 } 188 } 189 190 static void 191 print_v7_cache(void ) 192 { 193 uint32_t type, val, size, sets, ways, linesize; 194 int i; 195 196 printf("LoUU:%d LoC:%d LoUIS:%d \n", 197 CPU_CLIDR_LOUU(cpuinfo.clidr) + 1, 198 CPU_CLIDR_LOC(cpuinfo.clidr) + 1, 199 CPU_CLIDR_LOUIS(cpuinfo.clidr) + 1); 200 201 for (i = 0; i < 7; i++) { 202 type = CPU_CLIDR_CTYPE(cpuinfo.clidr, i); 203 if (type == 0) 204 break; 205 printf("Cache level %d:\n", i + 1); 206 if (type == CACHE_DCACHE || type == CACHE_UNI_CACHE || 207 type == CACHE_SEP_CACHE) { 208 cp15_csselr_set(i << 1); 209 val = cp15_ccsidr_get(); 210 ways = CPUV7_CT_xSIZE_ASSOC(val) + 1; 211 sets = CPUV7_CT_xSIZE_SET(val) + 1; 212 linesize = 1 << (CPUV7_CT_xSIZE_LEN(val) + 4); 213 size = (ways * sets * linesize) / 1024; 214 215 if (type == CACHE_UNI_CACHE) 216 printf(" %dKB/%dB %d-way unified cache", 217 size, linesize,ways); 218 else 219 printf(" %dKB/%dB %d-way data cache", 220 size, linesize, ways); 221 if (val & CPUV7_CT_CTYPE_WT) 222 printf(" WT"); 223 if (val & CPUV7_CT_CTYPE_WB) 224 printf(" WB"); 225 if (val & CPUV7_CT_CTYPE_RA) 226 printf(" Read-Alloc"); 227 if (val & CPUV7_CT_CTYPE_WA) 228 printf(" Write-Alloc"); 229 printf("\n"); 230 } 231 232 if (type == CACHE_ICACHE || type == CACHE_SEP_CACHE) { 233 cp15_csselr_set(i << 1 | 1); 234 val = cp15_ccsidr_get(); 235 ways = CPUV7_CT_xSIZE_ASSOC(val) + 1; 236 sets = CPUV7_CT_xSIZE_SET(val) + 1; 237 linesize = 1 << (CPUV7_CT_xSIZE_LEN(val) + 4); 238 size = (ways * sets * linesize) / 1024; 239 printf(" %dKB/%dB %d-way instruction cache", 240 size, linesize, ways); 241 if (val & CPUV7_CT_CTYPE_WT) 242 printf(" WT"); 243 if (val & CPUV7_CT_CTYPE_WB) 244 printf(" WB"); 245 if (val & CPUV7_CT_CTYPE_RA) 246 printf(" Read-Alloc"); 247 if (val & CPUV7_CT_CTYPE_WA) 248 printf(" Write-Alloc"); 249 printf("\n"); 250 } 251 } 252 cp15_csselr_set(0); 253 } 254 255 static void 256 add_cap(char *cap) 257 { 258 int len; 259 260 len = strlen(cap); 261 262 if ((hw_buf_idx + len + 2) >= 79) { 263 printf("%s,\n", hw_buf); 264 hw_buf_idx = 0; 265 hw_buf_newline = true; 266 } 267 if (hw_buf_newline) 268 hw_buf_idx += sprintf(hw_buf + hw_buf_idx, " "); 269 else 270 hw_buf_idx += sprintf(hw_buf + hw_buf_idx, ", "); 271 hw_buf_newline = false; 272 273 hw_buf_idx += sprintf(hw_buf + hw_buf_idx, "%s", cap); 274 } 275 276 void 277 identify_arm_cpu(void) 278 { 279 int i; 280 u_int val; 281 282 /* 283 * CPU 284 */ 285 for(i = 0; i < nitems(cpu_names); i++) { 286 if (cpu_names[i].implementer == cpuinfo.implementer && 287 cpu_names[i].part_number == cpuinfo.part_number) { 288 cpu_class = cpu_names[i].cpu_class; 289 snprintf(cpu_model, sizeof(cpu_model), 290 "%s %s r%dp%d (ECO: 0x%08X)", 291 cpu_names[i].impl_name, cpu_names[i].core_name, 292 cpuinfo.revision, cpuinfo.patch, 293 cpuinfo.midr != cpuinfo.revidr ? 294 cpuinfo.revidr : 0); 295 printf("CPU: %s\n", cpu_model); 296 break; 297 } 298 } 299 if (i >= nitems(cpu_names)) 300 printf("unknown CPU (ID = 0x%x)\n", cpuinfo.midr); 301 302 printf("CPU Features: \n"); 303 hw_buf_idx = 0; 304 hw_buf_newline = true; 305 306 val = (cpuinfo.mpidr >> 4)& 0xF; 307 if (cpuinfo.mpidr & (1 << 31U)) 308 add_cap("Multiprocessing"); 309 val = (cpuinfo.id_pfr0 >> 4)& 0xF; 310 if (val == 1) 311 add_cap("Thumb"); 312 else if (val == 3) 313 add_cap("Thumb2"); 314 315 val = (cpuinfo.id_pfr1 >> 4)& 0xF; 316 if (val == 1 || val == 2) 317 add_cap("Security"); 318 319 val = (cpuinfo.id_pfr1 >> 12)& 0xF; 320 if (val == 1) 321 add_cap("Virtualization"); 322 323 val = (cpuinfo.id_pfr1 >> 16)& 0xF; 324 if (val == 1) 325 add_cap("Generic Timer"); 326 327 val = (cpuinfo.id_mmfr0 >> 0)& 0xF; 328 if (val == 2) { 329 add_cap("VMSAv6"); 330 } else if (val >= 3) { 331 add_cap("VMSAv7"); 332 if (val >= 4) 333 add_cap("PXN"); 334 if (val >= 5) 335 add_cap("LPAE"); 336 } 337 338 val = (cpuinfo.id_mmfr3 >> 20)& 0xF; 339 if (val == 1) 340 add_cap("Coherent Walk"); 341 342 if (hw_buf_idx != 0) 343 printf("%s\n", hw_buf); 344 345 printf("Optional instructions: \n"); 346 hw_buf_idx = 0; 347 hw_buf_newline = true; 348 val = (cpuinfo.id_isar0 >> 24)& 0xF; 349 if (val == 1) 350 add_cap("SDIV/UDIV (Thumb)"); 351 else if (val == 2) 352 add_cap("SDIV/UDIV"); 353 354 val = (cpuinfo.id_isar2 >> 20)& 0xF; 355 if (val == 1 || val == 2) 356 add_cap("UMULL"); 357 358 val = (cpuinfo.id_isar2 >> 16)& 0xF; 359 if (val == 1 || val == 2 || val == 3) 360 add_cap("SMULL"); 361 362 val = (cpuinfo.id_isar2 >> 12)& 0xF; 363 if (val == 1) 364 add_cap("MLA"); 365 366 val = (cpuinfo.id_isar3 >> 4)& 0xF; 367 if (val == 1) 368 add_cap("SIMD"); 369 else if (val == 3) 370 add_cap("SIMD(ext)"); 371 if (hw_buf_idx != 0) 372 printf("%s\n", hw_buf); 373 374 /* 375 * Cache 376 */ 377 if (CPU_CT_FORMAT(cpuinfo.ctr) == CPU_CT_ARMV7) 378 print_v7_cache(); 379 else 380 print_v5_cache(); 381 } 382