1 /* $NetBSD: machdep.c,v 1.59 2025/12/20 10:51:05 skrll Exp $ */ 2 3 /* 4 * Copyright 2000, 2001 5 * Broadcom Corporation. All rights reserved. 6 * 7 * This software is furnished under license and may be used and copied only 8 * in accordance with the following terms and conditions. Subject to these 9 * conditions, you may download, copy, install, use, modify and distribute 10 * modified or unmodified copies of this software in source and/or binary 11 * form. No title or ownership is transferred hereby. 12 * 13 * 1) Any source code used, modified or distributed must reproduce and 14 * retain this copyright notice and list of conditions as they appear in 15 * the source file. 16 * 17 * 2) No right is granted to use any trade name, trademark, or logo of 18 * Broadcom Corporation. The "Broadcom Corporation" name may not be 19 * used to endorse or promote products derived from this software 20 * without the prior written permission of Broadcom Corporation. 21 * 22 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED 23 * WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF 24 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR 25 * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE 26 * FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE 27 * LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 32 * OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 2000 Soren S. Jorvang. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions, and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 */ 59 60 #include <sys/cdefs.h> 61 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.59 2025/12/20 10:51:05 skrll Exp $"); 62 63 #include "opt_ddb.h" 64 #include "opt_execfmt.h" 65 #include "opt_modular.h" 66 67 #include <sys/param.h> 68 #include <sys/buf.h> 69 #include <sys/conf.h> 70 #include <sys/cpu.h> 71 #include <sys/device.h> 72 #include <sys/exec.h> 73 #include <sys/file.h> 74 #include <sys/intr.h> 75 #include <sys/kcore.h> 76 #include <sys/kernel.h> 77 #include <sys/ksyms.h> 78 #include <sys/mbuf.h> 79 #include <sys/mount.h> 80 #include <sys/msgbuf.h> 81 #include <sys/proc.h> 82 #include <sys/reboot.h> 83 #include <sys/syscallargs.h> 84 #include <sys/systm.h> 85 86 #include <uvm/uvm_extern.h> 87 88 #include <mips/locore.h> 89 #include <mips/psl.h> 90 #include <mips/pte.h> 91 #include <mips/reg.h> 92 93 #include <mips/cfe/cfe_api.h> 94 95 #include <sbmips/autoconf.h> 96 #include <sbmips/swarm.h> 97 98 #if 0 /* XXXCGD */ 99 #include <sbmips/nvram.h> 100 #endif /* XXXCGD */ 101 #include <sbmips/leds.h> 102 103 #include <mips/sibyte/dev/sbbuswatchvar.h> 104 105 #include "ksyms.h" 106 107 #if NKSYMS || defined(DDB) || defined(MODULAR) 108 #include <mips/db_machdep.h> 109 #include <ddb/db_access.h> 110 #include <ddb/db_sym.h> 111 #include <ddb/db_extern.h> 112 #include <sys/exec_elf.h> 113 #endif 114 115 #include <dev/cons.h> 116 117 #if NKSYMS || defined(DDB) || defined(MODULAR) 118 /* start and end of kernel symbol table */ 119 void *ksym_start, *ksym_end; 120 #endif 121 122 /* Maps for VM objects. */ 123 struct vm_map *phys_map = NULL; 124 125 char bootstring[512]; /* Boot command */ 126 int netboot; /* Are we netbooting? */ 127 int cfe_present; 128 129 struct bootinfo_v1 bootinfo; 130 131 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 132 int mem_cluster_cnt; 133 134 void configure(void); 135 void mach_init(long, long, long, long); 136 137 extern void *esym; 138 139 /* 140 * Do all the stuff that locore normally does before calling main(). 141 */ 142 void 143 mach_init(long fwhandle, long magic, long bootdata, long reserved) 144 { 145 void *kernend; 146 extern char edata[], end[]; 147 uint32_t config; 148 149 /* XXX this code must run on the target CPU */ 150 config = mips3_cp0_config_read(); 151 config &= ~MIPS3_CONFIG_K0_MASK; 152 config |= 0x05; /* XXX. cacheable coherent */ 153 mips3_cp0_config_write(config); 154 155 /* Zero BSS. XXXCGD: uh, is this really necessary still? */ 156 memset(edata, 0, end - edata); 157 158 /* 159 * Copy the bootinfo structure from the boot loader. 160 * this has to be done before mips_vector_init is 161 * called because we may need CFE's TLB handler 162 */ 163 164 if (magic == BOOTINFO_MAGIC) 165 memcpy(&bootinfo, (struct bootinfo_v1 *)bootdata, 166 sizeof bootinfo); 167 else if (reserved == CFE_EPTSEAL) { 168 magic = BOOTINFO_MAGIC; 169 memset(&bootinfo, 0, sizeof bootinfo); 170 bootinfo.version = BOOTINFO_VERSION; 171 bootinfo.fwhandle = fwhandle; 172 bootinfo.fwentry = bootdata; 173 bootinfo.ssym = (vaddr_t)end; 174 bootinfo.esym = (vaddr_t)end; 175 } 176 177 kernend = (void *)mips_round_page(end); 178 #if NKSYMS || defined(DDB) || defined(MODULAR) 179 if (magic == BOOTINFO_MAGIC) { 180 ksym_start = (void *)(intptr_t)bootinfo.ssym; 181 ksym_end = (void *)(intptr_t)bootinfo.esym; 182 kernend = (void *)mips_round_page((vaddr_t)ksym_end); 183 } 184 #endif 185 186 consinit(); 187 188 uvm_md_init(); 189 190 /* 191 * Copy exception-dispatch code down to exception vector. 192 * Initialize locore-function vector. 193 * Clear out the I and D caches. 194 */ 195 #ifdef MULTIPROCESSOR 196 mips_vector_init(NULL, true); 197 #else 198 mips_vector_init(NULL, false); 199 #endif 200 201 mips_locoresw.lsw_bus_error = sibyte_bus_watch_check; 202 203 sb1250_ipl_map_init(); 204 205 #ifdef DEBUG 206 printf("fwhandle=%08X magic=%08X bootdata=%08X reserved=%08X\n", 207 (u_int)fwhandle, (u_int)magic, (u_int)bootdata, (u_int)reserved); 208 #endif 209 210 cpu_setmodel("sb1250"); 211 212 if (magic == BOOTINFO_MAGIC) { 213 int idx; 214 int added; 215 uint64_t start, len, type; 216 217 cfe_init(bootinfo.fwhandle, bootinfo.fwentry); 218 cfe_present = 1; 219 220 idx = 0; 221 physmem = 0; 222 mem_cluster_cnt = 0; 223 while (cfe_enummem(idx, 0, &start, &len, &type) == 0) { 224 added = 0; 225 printf("Memory Block #%d start %08"PRIx64"X len %08"PRIx64"X: %s: ", 226 idx, start, len, (type == CFE_MI_AVAILABLE) ? 227 "Available" : "Reserved"); 228 if ((type == CFE_MI_AVAILABLE) && 229 (mem_cluster_cnt < VM_PHYSSEG_MAX)) { 230 /* 231 * XXX Ignore memory above 256MB for now, it 232 * XXX needs special handling. 233 */ 234 if (start < (256*1024*1024)) { 235 physmem += btoc(((int) len)); 236 mem_clusters[mem_cluster_cnt].start = 237 (long) start; 238 mem_clusters[mem_cluster_cnt].size = 239 (long) len; 240 mem_cluster_cnt++; 241 added = 1; 242 } 243 } 244 if (added) 245 printf("added to map\n"); 246 else 247 printf("not added to map\n"); 248 idx++; 249 } 250 251 } else { 252 /* 253 * Handle the case of not being called from the firmware. 254 */ 255 /* XXX hardwire to 32MB; should be kernel config option */ 256 physmem = 32 * 1024 * 1024 / 4096; 257 mem_clusters[0].start = 0; 258 mem_clusters[0].size = ctob(physmem); 259 mem_cluster_cnt = 1; 260 } 261 262 263 for (u_int i = 0; i < sizeof(bootinfo.boot_flags); i++) { 264 switch (bootinfo.boot_flags[i]) { 265 case '\0': 266 break; 267 case ' ': 268 continue; 269 case '-': 270 while (bootinfo.boot_flags[i] != ' ' && 271 bootinfo.boot_flags[i] != '\0') { 272 switch (bootinfo.boot_flags[i]) { 273 case 'a': 274 boothowto |= RB_ASKNAME; 275 break; 276 case 'd': 277 boothowto |= RB_KDB; 278 break; 279 case 's': 280 boothowto |= RB_SINGLE; 281 break; 282 } 283 i++; 284 } 285 } 286 } 287 288 /* 289 * Load the rest of the available pages into the VM system. 290 */ 291 mips_page_physload(MIPS_KSEG0_START, (vaddr_t) kernend, 292 mem_clusters, mem_cluster_cnt, NULL, 0); 293 294 /* 295 * Initialize error message buffer (at end of core). 296 */ 297 mips_init_msgbuf(); 298 299 pmap_bootstrap(); 300 301 /* 302 * Allocate uarea for lwp0 and set it. 303 */ 304 mips_init_lwp0_uarea(); 305 306 /* 307 * Initialize debuggers, and break into them, if appropriate. 308 */ 309 #if NKSYMS || defined(DDB) || defined(MODULAR) 310 ksyms_addsyms_elf(((uintptr_t)ksym_end - (uintptr_t)ksym_start), 311 ksym_start, ksym_end); 312 #endif 313 314 if (boothowto & RB_KDB) { 315 #if defined(DDB) 316 Debugger(); 317 #endif 318 } 319 320 #ifdef MULTIPROCESSOR 321 mips_fixup_exceptions(mips_fixup_zero_relative, NULL); 322 #endif 323 } 324 325 /* 326 * Allocate memory for variable-sized tables, 327 */ 328 void 329 cpu_startup(void) 330 { 331 /* 332 * Just do the common stuff. 333 */ 334 cpu_startup_common(); 335 } 336 337 int waittime = -1; 338 339 void 340 cpu_reboot(int howto, char *bootstr) 341 { 342 343 /* Take a snapshot before clobbering any registers. */ 344 savectx(curpcb); 345 346 if (cold) { 347 howto |= RB_HALT; 348 goto haltsys; 349 } 350 351 /* If "always halt" was specified as a boot flag, obey. */ 352 if (boothowto & RB_HALT) 353 howto |= RB_HALT; 354 355 boothowto = howto; 356 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 357 waittime = 0; 358 vfs_shutdown(); 359 } 360 361 splhigh(); 362 363 if (howto & RB_DUMP) 364 dumpsys(); 365 366 haltsys: 367 doshutdownhooks(); 368 369 pmf_system_shutdown(boothowto); 370 371 if (howto & RB_HALT) { 372 printf("\n"); 373 printf("The operating system has halted.\n"); 374 printf("Please press any key to reboot.\n\n"); 375 cnpollc(true); /* For proper keyboard command handling */ 376 cngetc(); 377 cnpollc(false); 378 } 379 380 printf("rebooting...\n\n"); 381 382 if (cfe_present) { 383 /* 384 * XXX 385 * For some reason we can't return to CFE with 386 * and do a warm start. Need to look into this... 387 */ 388 cfe_exit(0, (howto & RB_DUMP) ? 1 : 0); 389 printf("cfe_exit didn't!\n"); 390 } 391 392 printf("WARNING: reboot failed!\n"); 393 394 for (;;); 395 } 396 397 static void 398 cswarm_setled(u_int index, char c) 399 { 400 volatile u_char *led_ptr = 401 (void *)MIPS_PHYS_TO_KSEG1(SWARM_LEDS_PHYS); 402 403 if (index < 4) 404 led_ptr[0x20 + ((3 - index) << 3)] = c; 405 } 406 407 void 408 cswarm_setleds(const char *str) 409 { 410 int i; 411 412 for (i = 0; i < 4 && str[i]; i++) 413 cswarm_setled(i, str[i]); 414 for (; i < 4; i++) 415 cswarm_setled(' ', str[i]); 416 } 417 418 int 419 sbmips_cca_for_pa(paddr_t pa) 420 { 421 int rv; 422 423 rv = 2; /* Uncached. */ 424 425 /* Check each DRAM region. */ 426 if ((pa >= 0x0000000000 && pa <= 0x000fffffff) || /* DRAM 0 */ 427 (pa >= 0x0080000000 && pa <= 0x008fffffff) || /* DRAM 1 */ 428 (pa >= 0x0090000000 && pa <= 0x009fffffff) || /* DRAM 2 */ 429 (pa >= 0x00c0000000 && pa <= 0x00cfffffff) || /* DRAM 3 */ 430 #ifdef _MIPS_PADDR_T_64BIT 431 (pa >= 0x0100000000LL && pa <= 0x07ffffffffLL) || /* DRAM exp */ 432 #endif 433 0) { 434 rv = 5; /* Cacheable coherent. */ 435 } 436 437 return (rv); 438 } 439
Indexes created Sun Oct 25 00:26:45 UTC 2026