machdep.c revision 1.28.10.10
1 /* machdep.c,v 1.28.10.9 2011/04/29 08:26:18 matt Exp */ 2 3 /* 4 * Copyright 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe and Simon Burge 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 * Copyright (c) 1992, 1993 40 * The Regents of the University of California. All rights reserved. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department, The Mach Operating System project at 45 * Carnegie-Mellon University and Ralph Campbell. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 72 * from: Utah Hdr: machdep.c 1.63 91/04/24 73 */ 74 /* 75 * Copyright (c) 1988 University of Utah. 76 * 77 * This code is derived from software contributed to Berkeley by 78 * the Systems Programming Group of the University of Utah Computer 79 * Science Department, The Mach Operating System project at 80 * Carnegie-Mellon University and Ralph Campbell. 81 * 82 * Redistribution and use in source and binary forms, with or without 83 * modification, are permitted provided that the following conditions 84 * are met: 85 * 1. Redistributions of source code must retain the above copyright 86 * notice, this list of conditions and the following disclaimer. 87 * 2. Redistributions in binary form must reproduce the above copyright 88 * notice, this list of conditions and the following disclaimer in the 89 * documentation and/or other materials provided with the distribution. 90 * 3. All advertising materials mentioning features or use of this software 91 * must display the following acknowledgement: 92 * This product includes software developed by the University of 93 * California, Berkeley and its contributors. 94 * 4. Neither the name of the University nor the names of its contributors 95 * may be used to endorse or promote products derived from this software 96 * without specific prior written permission. 97 * 98 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 99 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 100 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 101 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 102 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 103 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 104 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 105 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 106 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 107 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 108 * SUCH DAMAGE. 109 * 110 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 111 * from: Utah Hdr: machdep.c 1.63 91/04/24 112 */ 113 114 #include <sys/cdefs.h> 115 __KERNEL_RCSID(0, "machdep.c,v 1.28.10.9 2011/04/29 08:26:18 matt Exp"); 116 117 #include "opt_ddb.h" 118 #include "opt_execfmt.h" 119 120 #include <sys/param.h> 121 #include <sys/systm.h> 122 #include <sys/kernel.h> 123 #include <sys/buf.h> 124 #include <sys/reboot.h> 125 #include <sys/user.h> 126 #include <sys/mount.h> 127 #include <sys/kcore.h> 128 #include <sys/boot_flag.h> 129 #include <sys/termios.h> 130 #include <sys/ksyms.h> 131 #include <sys/lwp.h> 132 133 #include <uvm/uvm_extern.h> 134 135 #include <dev/cons.h> 136 137 #include "ksyms.h" 138 139 #if NKSYMS || defined(DDB) || defined(LKM) 140 #include <machine/db_machdep.h> 141 #include <ddb/db_extern.h> 142 #endif 143 144 #include <machine/cpu.h> 145 #include <machine/psl.h> 146 #include <machine/yamon.h> 147 148 #include <mips/locore.h> 149 150 #include <evbmips/malta/autoconf.h> 151 #include <evbmips/malta/maltareg.h> 152 #include <evbmips/malta/maltavar.h> 153 154 #include "com.h" 155 #if NCOM > 0 156 #include <dev/ic/comreg.h> 157 #include <dev/ic/comvar.h> 158 159 int comcnrate = 38400; /* XXX should be config option */ 160 #endif /* NCOM > 0 */ 161 162 163 #define REGVAL(x) *((volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x)))) 164 165 struct malta_config malta_configuration; 166 167 /* For sysctl_hw. */ 168 extern char cpu_model[]; 169 170 /* Maps for VM objects. */ 171 struct vm_map *mb_map = NULL; 172 struct vm_map *phys_map = NULL; 173 174 int physmem; /* Total physical memory */ 175 176 int netboot; /* Are we netbooting? */ 177 178 yamon_env_var *yamon_envp; 179 180 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 181 u_int mem_cluster_cnt; 182 183 void configure(void); 184 void mach_init(int, char **, yamon_env_var *, u_long); 185 186 /* 187 * Do all the stuff that locore normally does before calling main(). 188 */ 189 void 190 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 191 { 192 struct malta_config *mcp = &malta_configuration; 193 uint8_t * const brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); 194 bus_space_handle_t sh; 195 void *kernend; 196 int freqok; 197 198 extern char edata[], end[]; 199 200 CTASSERT((intptr_t)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES) < 0); 201 202 *brkres = 0; /* Disable BREAK==reset on console */ 203 204 /* Get the propaganda in early! */ 205 led_display_str("NetBSD"); 206 207 /* 208 * Clear the BSS segment. 209 */ 210 kernend = (void *)mips_round_page(end); 211 memset(edata, 0, (char *)kernend - edata); 212 213 /* save the yamon environment pointer */ 214 yamon_envp = envp; 215 216 /* Use YAMON callbacks for early console I/O */ 217 cn_tab = &yamon_promcd; 218 219 /* 220 * Set up the exception vectors and CPU-specific function 221 * vectors early on. We need the wbflush() vector set up 222 * before comcnattach() is called (or at least before the 223 * first printf() after that is called). 224 * Also clears the I+D caches. 225 */ 226 mips_vector_init(NULL, false); 227 228 /* set the VM page size */ 229 uvm_setpagesize(); 230 231 physmem = btoc(memsize); 232 233 /* 234 * Use YAMON's CPU frequency if available. 235 */ 236 freqok = yamon_setcpufreq(1); 237 238 gt_pci_init(&mcp->mc_pc, &mcp->mc_gt); 239 malta_bus_io_init(&mcp->mc_iot, mcp); 240 malta_bus_mem_init(&mcp->mc_memt, mcp); 241 malta_dma_init(mcp); 242 243 /* 244 * Calibrate the timer if YAMON failed to tell us. 245 */ 246 if (!freqok) { 247 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh); 248 malta_cal_timer(&mcp->mc_iot, sh); 249 bus_space_unmap(&mcp->mc_iot, sh, 2); 250 } 251 252 #if NCOM > 0 253 /* 254 * Delay to allow firmware putchars to complete. 255 * FIFO depth * character time. 256 * character time = (1000000 / (defaultrate / 10)) 257 */ 258 delay(160000000 / comcnrate); 259 if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, 260 COM_FREQ, COM_TYPE_NORMAL, 261 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 262 panic("malta: unable to initialize serial console"); 263 #else 264 panic("malta: not configured to use serial console"); 265 #endif /* NCOM > 0 */ 266 267 mem_clusters[0].start = 0; 268 mem_clusters[0].size = ctob(physmem); 269 mem_cluster_cnt = 1; 270 271 strcpy(cpu_model, "MIPS Malta Evaluation Board"); 272 273 /* 274 * XXX: check argv[0] - do something if "gdb"??? 275 */ 276 277 /* 278 * Look at arguments passed to us and compute boothowto. 279 */ 280 boothowto = RB_AUTOBOOT; 281 #ifndef _LP64 282 for (int i = 1; i < argc; i++) { 283 for (char *cp = argv[i]; *cp; cp++) { 284 int howto; 285 /* Ignore superfluous '-', if there is one */ 286 if (*cp == '-') 287 continue; 288 289 howto = 0; 290 BOOT_FLAG(*cp, howto); 291 if (! howto) 292 printf("bootflag '%c' not recognised\n", *cp); 293 else 294 boothowto |= howto; 295 } 296 } 297 #endif 298 299 /* 300 * Load the rest of the available pages into the VM system. 301 */ 302 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 303 mem_clusters, mem_cluster_cnt, NULL, 0); 304 305 /* 306 * Initialize error message buffer (at end of core). 307 */ 308 mips_init_msgbuf(); 309 310 pmap_bootstrap(); 311 312 /* 313 * Allocate space for proc0's USPACE. 314 */ 315 mips_init_lwp0_uarea(); 316 317 /* 318 * Initialize debuggers, and break into them, if appropriate. 319 */ 320 #if NKSYMS || defined(DDB) || defined(LKM) 321 ksyms_init(0, 0, 0); 322 #endif 323 324 #if defined(DDB) 325 if (boothowto & RB_KDB) 326 Debugger(); 327 #endif 328 329 #ifdef MULTIPROCESSOR 330 /* 331 * We can never be running on more than one processor but we can dream. 332 */ 333 mips_fixup_exceptions(mips_fixup_zero_relative); 334 #endif 335 } 336 337 void 338 consinit(void) 339 { 340 341 /* 342 * Everything related to console initialization is done 343 * in mach_init(). 344 */ 345 } 346 347 /* 348 * Allocate memory for variable-sized tables, 349 */ 350 void 351 cpu_startup() 352 { 353 /* 354 * Do the common startup items. 355 */ 356 cpu_startup_common(); 357 358 /* 359 * Virtual memory is bootstrapped -- notify the bus spaces 360 * that memory allocation is now safe. 361 */ 362 malta_configuration.mc_mallocsafe = 1; 363 } 364 365 int waittime = -1; 366 367 void 368 cpu_reboot(howto, bootstr) 369 int howto; 370 char *bootstr; 371 { 372 373 /* Take a snapshot before clobbering any registers. */ 374 savectx(lwp_getpcb(curlwp)); 375 376 if (cold) { 377 howto |= RB_HALT; 378 goto haltsys; 379 } 380 381 /* If "always halt" was specified as a boot flag, obey. */ 382 if (boothowto & RB_HALT) 383 howto |= RB_HALT; 384 385 boothowto = howto; 386 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 387 waittime = 0; 388 vfs_shutdown(); 389 390 /* 391 * If we've been adjusting the clock, the todr 392 * will be out of synch; adjust it now. 393 */ 394 resettodr(); 395 } 396 397 splhigh(); 398 399 if (howto & RB_DUMP) 400 dumpsys(); 401 402 haltsys: 403 doshutdownhooks(); 404 405 if (howto & RB_HALT) { 406 printf("\n"); 407 printf("The operating system has halted.\n"); 408 printf("Please press any key to reboot.\n\n"); 409 cnpollc(1); /* For proper keyboard command handling */ 410 cngetc(); 411 cnpollc(0); 412 } 413 414 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 415 yamon_exit(boothowto); 416 printf("Oops, back from yamon_exit()\n\nResetting..."); 417 418 REGVAL(MALTA_SOFTRES) = MALTA_GORESET; 419 420 /* 421 * Need a small delay here, otherwise we see the first few characters of 422 * the warning below. 423 */ 424 delay(80000); 425 426 printf("WARNING: reset failed!\nSpinning..."); 427 428 for (;;) 429 /* spin forever */ ; /* XXX */ 430 } 431
Indexes created Thu Oct 23 22:10:10 GMT 2025