machdep.c revision 1.16
1 /* $NetBSD: machdep.c,v 1.16 2003/10/27 23:47:00 simonb 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 1.16 2003/10/27 23:47:00 simonb 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> 131 132 #include <uvm/uvm_extern.h> 133 134 #include <dev/cons.h> 135 136 #include "ksyms.h" 137 138 #if NKSYMS || defined(DDB) || defined(LKM) 139 #include <machine/db_machdep.h> 140 #include <ddb/db_extern.h> 141 #endif 142 143 #include <machine/cpu.h> 144 #include <machine/psl.h> 145 #include <machine/yamon.h> 146 147 #include <evbmips/malta/autoconf.h> 148 #include <evbmips/malta/maltareg.h> 149 #include <evbmips/malta/maltavar.h> 150 151 #include "com.h" 152 #if NCOM > 0 153 #include <dev/ic/comreg.h> 154 #include <dev/ic/comvar.h> 155 156 int comcnrate = 38400; /* XXX should be config option */ 157 #endif /* NCOM > 0 */ 158 159 160 #define REGVAL(x) *((__volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x)))) 161 162 struct malta_config malta_configuration; 163 164 /* For sysctl_hw. */ 165 extern char cpu_model[]; 166 167 /* Our exported CPU info; we can have only one. */ 168 struct cpu_info cpu_info_store; 169 170 /* Maps for VM objects. */ 171 struct vm_map *exec_map = NULL; 172 struct vm_map *mb_map = NULL; 173 struct vm_map *phys_map = NULL; 174 175 int physmem; /* Total physical memory */ 176 177 int netboot; /* Are we netbooting? */ 178 179 yamon_env_var *yamon_envp; 180 181 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 182 int mem_cluster_cnt; 183 184 void configure(void); 185 void mach_init(int, char **, yamon_env_var *, u_long); 186 187 /* 188 * safepri is a safe priority for sleep to set for a spin-wait during 189 * autoconfiguration or after a panic. Used as an argument to splx(). 190 */ 191 int safepri = MIPS1_PSL_LOWIPL; 192 193 extern struct user *proc0paddr; 194 195 /* 196 * Do all the stuff that locore normally does before calling main(). 197 */ 198 void 199 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 200 { 201 struct malta_config *mcp = &malta_configuration; 202 bus_space_handle_t sh; 203 caddr_t kernend, v; 204 u_long first, last; 205 vsize_t size; 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 = (caddr_t)mips_round_page(end); 221 memset(edata, 0, 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 /* 320 * Compute the size of system data structures. pmap_bootstrap() 321 * needs some of this information. 322 */ 323 size = (vsize_t)allocsys(NULL, NULL); 324 325 pmap_bootstrap(); 326 327 /* 328 * Allocate space for proc0's USPACE. 329 */ 330 v = (caddr_t)uvm_pageboot_alloc(USPACE); 331 lwp0.l_addr = proc0paddr = (struct user *)v; 332 lwp0.l_md.md_regs = (struct frame *)(v + USPACE) - 1; 333 curpcb = &lwp0.l_addr->u_pcb; 334 curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ 335 336 /* 337 * Allocate space for system data structures. These data structures 338 * are allocated here instead of cpu_startup() because physical 339 * memory is directly addressable. We don't have to map these into 340 * the virtual address space. 341 */ 342 v = (caddr_t)uvm_pageboot_alloc(size); 343 if ((allocsys(v, NULL) - v) != size) 344 panic("mach_init: table size inconsistency"); 345 346 /* 347 * Initialize debuggers, and break into them, if appropriate. 348 */ 349 #if NKSYMS || defined(DDB) || defined(LKM) 350 ksyms_init(0, 0, 0); 351 #endif 352 353 #if defined(DDB) 354 if (boothowto & RB_KDB) 355 Debugger(); 356 #endif 357 } 358 359 void 360 consinit(void) 361 { 362 363 /* 364 * Everything related to console initialization is done 365 * in mach_init(). 366 */ 367 } 368 369 /* 370 * Allocate memory for variable-sized tables, 371 */ 372 void 373 cpu_startup() 374 { 375 u_int i, base, residual; 376 vaddr_t minaddr, maxaddr; 377 vsize_t size; 378 char pbuf[9]; 379 380 /* 381 * Good {morning,afternoon,evening,night}. 382 */ 383 printf(version); 384 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 385 printf("%s memory", pbuf); 386 387 /* 388 * Virtual memory is bootstrapped -- notify the bus spaces 389 * that memory allocation is now safe. 390 */ 391 malta_configuration.mc_mallocsafe = 1; 392 393 /* 394 * Allocate virtual address space for file I/O buffers. 395 * Note they are different than the array of headers, 'buf', 396 * and usually occupy more virtual memory than physical. 397 */ 398 size = MAXBSIZE * nbuf; 399 if (uvm_map(kernel_map, (vaddr_t *)(void *)&buffers, round_page(size), 400 NULL, UVM_UNKNOWN_OFFSET, 0, 401 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 402 UVM_ADV_NORMAL, 0)) != 0) 403 panic("startup: cannot allocate VM for buffers"); 404 minaddr = (vaddr_t)buffers; 405 base = bufpages / nbuf; 406 residual = bufpages % nbuf; 407 for (i = 0; i < nbuf; i++) { 408 vsize_t curbufsize; 409 vaddr_t curbuf; 410 struct vm_page *pg; 411 412 /* 413 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 414 * that MAXBSIZE space, we allocate and map (base+1) pages 415 * for the first "residual" buffers, and then we allocate 416 * "base" pages for the rest. 417 */ 418 curbuf = (vaddr_t) buffers + (i * MAXBSIZE); 419 curbufsize = PAGE_SIZE * ((i < residual) ? (base + 1) : base); 420 421 while (curbufsize) { 422 pg = uvm_pagealloc(NULL, 0, NULL, 0); 423 if (pg == NULL) 424 panic("cpu_startup: not enough memory for " 425 "buffer cache"); 426 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 427 VM_PROT_READ|VM_PROT_WRITE); 428 curbuf += PAGE_SIZE; 429 curbufsize -= PAGE_SIZE; 430 } 431 } 432 pmap_update(pmap_kernel()); 433 434 /* 435 * Allocate a submap for exec arguments. This map effectively 436 * limits the number of processes exec'ing at any time. 437 */ 438 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 439 16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 440 /* 441 * Allocate a submap for physio. 442 */ 443 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 444 VM_PHYS_SIZE, 0, FALSE, NULL); 445 446 /* 447 * (No need to allocate an mbuf cluster submap. Mbuf clusters 448 * are allocated via the pool allocator, and we use KSEG to 449 * map those pages.) 450 */ 451 452 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 453 printf(", %s free", pbuf); 454 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 455 printf(", %s in %u buffers\n", pbuf, nbuf); 456 457 /* 458 * Set up buffers, so they can be used to read disk labels. 459 */ 460 bufinit(); 461 } 462 463 int waittime = -1; 464 465 void 466 cpu_reboot(howto, bootstr) 467 int howto; 468 char *bootstr; 469 { 470 471 /* Take a snapshot before clobbering any registers. */ 472 if (curproc) 473 savectx((struct user *)curpcb); 474 475 if (cold) { 476 howto |= RB_HALT; 477 goto haltsys; 478 } 479 480 /* If "always halt" was specified as a boot flag, obey. */ 481 if (boothowto & RB_HALT) 482 howto |= RB_HALT; 483 484 boothowto = howto; 485 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 486 waittime = 0; 487 vfs_shutdown(); 488 489 /* 490 * If we've been adjusting the clock, the todr 491 * will be out of synch; adjust it now. 492 */ 493 resettodr(); 494 } 495 496 splhigh(); 497 498 if (howto & RB_DUMP) 499 dumpsys(); 500 501 haltsys: 502 doshutdownhooks(); 503 504 if (howto & RB_HALT) { 505 printf("\n"); 506 printf("The operating system has halted.\n"); 507 printf("Please press any key to reboot.\n\n"); 508 cnpollc(1); /* For proper keyboard command handling */ 509 cngetc(); 510 cnpollc(0); 511 } 512 513 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 514 yamon_exit(boothowto); 515 printf("Oops, back from yamon_exit()\n\nResetting..."); 516 517 REGVAL(MALTA_SOFTRES) = MALTA_GORESET; 518 519 /* 520 * Need a small delay here, otherwise we see the first few characters of 521 * the warning below. 522 */ 523 delay(80000); 524 525 printf("WARNING: reset failed!\nSpinning..."); 526 527 for (;;) 528 /* spin forever */ ; /* XXX */ 529 } 530
Indexes created Thu Oct 02 14:10:14 GMT 2025