machdep.c revision 1.32
1 /* $NetBSD: machdep.c,v 1.32 2009/02/13 22:41:01 apb 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, "$NetBSD: machdep.c,v 1.32 2009/02/13 22:41:01 apb Exp $"); 116 117 #include "opt_ddb.h" 118 #include "opt_execfmt.h" 119 #include "opt_modular.h" 120 121 #include <sys/param.h> 122 #include <sys/systm.h> 123 #include <sys/kernel.h> 124 #include <sys/buf.h> 125 #include <sys/reboot.h> 126 #include <sys/user.h> 127 #include <sys/mount.h> 128 #include <sys/kcore.h> 129 #include <sys/boot_flag.h> 130 #include <sys/termios.h> 131 #include <sys/ksyms.h> 132 #include <sys/device.h> 133 134 #include <uvm/uvm_extern.h> 135 136 #include <dev/cons.h> 137 138 #include "ksyms.h" 139 140 #if NKSYMS || defined(DDB) || defined(MODULAR) 141 #include <machine/db_machdep.h> 142 #include <ddb/db_extern.h> 143 #endif 144 145 #include <machine/cpu.h> 146 #include <machine/psl.h> 147 #include <machine/yamon.h> 148 149 #include <evbmips/malta/autoconf.h> 150 #include <evbmips/malta/maltareg.h> 151 #include <evbmips/malta/maltavar.h> 152 153 #include "com.h" 154 #if NCOM > 0 155 #include <dev/ic/comreg.h> 156 #include <dev/ic/comvar.h> 157 158 int comcnrate = 38400; /* XXX should be config option */ 159 #endif /* NCOM > 0 */ 160 161 162 #define REGVAL(x) *((volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x)))) 163 164 struct malta_config malta_configuration; 165 166 /* For sysctl_hw. */ 167 extern char cpu_model[]; 168 169 /* Our exported CPU info; we can have only one. */ 170 struct cpu_info cpu_info_store; 171 172 /* Maps for VM objects. */ 173 struct vm_map *mb_map = NULL; 174 struct vm_map *phys_map = NULL; 175 176 int physmem; /* Total physical memory */ 177 178 int netboot; /* Are we netbooting? */ 179 180 yamon_env_var *yamon_envp; 181 182 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 183 int mem_cluster_cnt; 184 185 void configure(void); 186 void mach_init(int, char **, yamon_env_var *, u_long); 187 188 /* 189 * safepri is a safe priority for sleep to set for a spin-wait during 190 * autoconfiguration or after a panic. Used as an argument to splx(). 191 */ 192 int safepri = MIPS1_PSL_LOWIPL; 193 194 extern struct user *proc0paddr; 195 196 /* 197 * Do all the stuff that locore normally does before calling main(). 198 */ 199 void 200 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 201 { 202 struct malta_config *mcp = &malta_configuration; 203 bus_space_handle_t sh; 204 void *kernend, *v; 205 u_long first, last; 206 char *cp; 207 int freqok, i, howto; 208 uint8_t *brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); 209 210 extern char edata[], end[]; 211 212 *brkres = 0; /* Disable BREAK==reset on console */ 213 214 /* Get the propaganda in early! */ 215 led_display_str("NetBSD"); 216 217 /* 218 * Clear the BSS segment. 219 */ 220 kernend = (void *)mips_round_page(end); 221 memset(edata, 0, (char *)kernend - edata); 222 223 /* save the yamon environment pointer */ 224 yamon_envp = envp; 225 226 /* Use YAMON callbacks for early console I/O */ 227 cn_tab = &yamon_promcd; 228 229 /* 230 * Set up the exception vectors and CPU-specific function 231 * vectors early on. We need the wbflush() vector set up 232 * before comcnattach() is called (or at least before the 233 * first printf() after that is called). 234 * Also clears the I+D caches. 235 */ 236 mips_vector_init(); 237 238 /* set the VM page size */ 239 uvm_setpagesize(); 240 241 physmem = btoc(memsize); 242 243 /* 244 * Use YAMON's CPU frequency if available. 245 */ 246 freqok = yamon_setcpufreq(1); 247 248 gt_pci_init(&mcp->mc_pc, &mcp->mc_gt); 249 malta_bus_io_init(&mcp->mc_iot, mcp); 250 malta_bus_mem_init(&mcp->mc_memt, mcp); 251 malta_dma_init(mcp); 252 253 /* 254 * Calibrate the timer if YAMON failed to tell us. 255 */ 256 if (!freqok) { 257 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh); 258 malta_cal_timer(&mcp->mc_iot, sh); 259 bus_space_unmap(&mcp->mc_iot, sh, 2); 260 } 261 262 #if NCOM > 0 263 /* 264 * Delay to allow firmware putchars to complete. 265 * FIFO depth * character time. 266 * character time = (1000000 / (defaultrate / 10)) 267 */ 268 delay(160000000 / comcnrate); 269 if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, 270 COM_FREQ, COM_TYPE_NORMAL, 271 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 272 panic("malta: unable to initialize serial console"); 273 #else 274 panic("malta: not configured to use serial console"); 275 #endif /* NCOM > 0 */ 276 277 mem_clusters[0].start = 0; 278 mem_clusters[0].size = ctob(physmem); 279 mem_cluster_cnt = 1; 280 281 strcpy(cpu_model, "MIPS Malta Evaluation Board"); 282 283 /* 284 * XXX: check argv[0] - do something if "gdb"??? 285 */ 286 287 /* 288 * Look at arguments passed to us and compute boothowto. 289 */ 290 boothowto = RB_AUTOBOOT; 291 for (i = 1; i < argc; i++) { 292 for (cp = argv[i]; *cp; cp++) { 293 /* Ignore superfluous '-', if there is one */ 294 if (*cp == '-') 295 continue; 296 297 howto = 0; 298 BOOT_FLAG(*cp, howto); 299 if (! howto) 300 printf("bootflag '%c' not recognised\n", *cp); 301 else 302 boothowto |= howto; 303 } 304 } 305 306 /* 307 * Load the rest of the available pages into the VM system. 308 */ 309 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 310 last = mem_clusters[0].start + mem_clusters[0].size; 311 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 312 VM_FREELIST_DEFAULT); 313 314 /* 315 * Initialize error message buffer (at end of core). 316 */ 317 mips_init_msgbuf(); 318 319 pmap_bootstrap(); 320 321 /* 322 * Allocate space for proc0's USPACE. 323 */ 324 v = (void *)uvm_pageboot_alloc(USPACE); 325 lwp0.l_addr = proc0paddr = (struct user *)v; 326 lwp0.l_md.md_regs = (struct frame *)((char *)v + USPACE) - 1; 327 proc0paddr->u_pcb.pcb_context[11] = 328 MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ 329 330 /* 331 * Initialize debuggers, and break into them, if appropriate. 332 */ 333 #if defined(DDB) 334 if (boothowto & RB_KDB) 335 Debugger(); 336 #endif 337 } 338 339 void 340 consinit(void) 341 { 342 343 /* 344 * Everything related to console initialization is done 345 * in mach_init(). 346 */ 347 } 348 349 /* 350 * Allocate memory for variable-sized tables, 351 */ 352 void 353 cpu_startup() 354 { 355 vaddr_t minaddr, maxaddr; 356 char pbuf[9]; 357 358 /* 359 * Good {morning,afternoon,evening,night}. 360 */ 361 printf("%s%s", copyright, version); 362 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 363 printf("total memory = %s\n", pbuf); 364 365 /* 366 * Virtual memory is bootstrapped -- notify the bus spaces 367 * that memory allocation is now safe. 368 */ 369 malta_configuration.mc_mallocsafe = 1; 370 371 minaddr = 0; 372 /* 373 * Allocate a submap for physio. 374 */ 375 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 376 VM_PHYS_SIZE, 0, FALSE, NULL); 377 378 /* 379 * (No need to allocate an mbuf cluster submap. Mbuf clusters 380 * are allocated via the pool allocator, and we use KSEG to 381 * map those pages.) 382 */ 383 384 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 385 printf("avail memory = %s\n", pbuf); 386 } 387 388 int waittime = -1; 389 390 void 391 cpu_reboot(howto, bootstr) 392 int howto; 393 char *bootstr; 394 { 395 396 /* Take a snapshot before clobbering any registers. */ 397 if (curproc) 398 savectx((struct user *)curpcb); 399 400 if (cold) { 401 howto |= RB_HALT; 402 goto haltsys; 403 } 404 405 /* If "always halt" was specified as a boot flag, obey. */ 406 if (boothowto & RB_HALT) 407 howto |= RB_HALT; 408 409 boothowto = howto; 410 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 411 waittime = 0; 412 vfs_shutdown(); 413 414 /* 415 * If we've been adjusting the clock, the todr 416 * will be out of synch; adjust it now. 417 */ 418 resettodr(); 419 } 420 421 splhigh(); 422 423 if (howto & RB_DUMP) 424 dumpsys(); 425 426 haltsys: 427 doshutdownhooks(); 428 429 pmf_system_shutdown(boothowto); 430 431 if (howto & RB_HALT) { 432 printf("\n"); 433 printf("The operating system has halted.\n"); 434 printf("Please press any key to reboot.\n\n"); 435 cnpollc(1); /* For proper keyboard command handling */ 436 cngetc(); 437 cnpollc(0); 438 } 439 440 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 441 yamon_exit(boothowto); 442 printf("Oops, back from yamon_exit()\n\nResetting..."); 443 444 REGVAL(MALTA_SOFTRES) = MALTA_GORESET; 445 446 /* 447 * Need a small delay here, otherwise we see the first few characters of 448 * the warning below. 449 */ 450 delay(80000); 451 452 printf("WARNING: reset failed!\nSpinning..."); 453 454 for (;;) 455 /* spin forever */ ; /* XXX */ 456 } 457
Indexes created Thu Oct 02 14:10:14 GMT 2025