machdep.c revision 1.26
1 /* $NetBSD: machdep.c,v 1.26 2006/02/13 02:37:05 gdamore Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Itronix Inc. 5 * All rights reserved. 6 * 7 * Portions written by Garrett D'Amore for Itronix 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. The name of Itronix Inc. may not be used to endorse 18 * or promote products derived from this software without specific 19 * prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 28 * ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 /* 34 * Copyright (c) 1992, 1993 35 * The Regents of the University of California. All rights reserved. 36 * 37 * This code is derived from software contributed to Berkeley by 38 * the Systems Programming Group of the University of Utah Computer 39 * Science Department, The Mach Operating System project at 40 * Carnegie-Mellon University and Ralph Campbell. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 67 * from: Utah Hdr: machdep.c 1.63 91/04/24 68 */ 69 /* 70 * Copyright (c) 1988 University of Utah. 71 * 72 * This code is derived from software contributed to Berkeley by 73 * the Systems Programming Group of the University of Utah Computer 74 * Science Department, The Mach Operating System project at 75 * Carnegie-Mellon University and Ralph Campbell. 76 * 77 * Redistribution and use in source and binary forms, with or without 78 * modification, are permitted provided that the following conditions 79 * are met: 80 * 1. Redistributions of source code must retain the above copyright 81 * notice, this list of conditions and the following disclaimer. 82 * 2. Redistributions in binary form must reproduce the above copyright 83 * notice, this list of conditions and the following disclaimer in the 84 * documentation and/or other materials provided with the distribution. 85 * 3. All advertising materials mentioning features or use of this software 86 * must display the following acknowledgement: 87 * This product includes software developed by the University of 88 * California, Berkeley and its contributors. 89 * 4. Neither the name of the University nor the names of its contributors 90 * may be used to endorse or promote products derived from this software 91 * without specific prior written permission. 92 * 93 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 94 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 95 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 96 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 97 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 98 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 99 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 101 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 102 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 103 * SUCH DAMAGE. 104 * 105 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 106 * from: Utah Hdr: machdep.c 1.63 91/04/24 107 */ 108 109 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 110 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.26 2006/02/13 02:37:05 gdamore Exp $"); 111 112 #include "opt_ddb.h" 113 #include "opt_kgdb.h" 114 115 #include "opt_memsize.h" 116 #include "opt_ethaddr.h" 117 118 #include <sys/param.h> 119 #include <sys/systm.h> 120 #include <sys/kernel.h> 121 #include <sys/buf.h> 122 #include <sys/reboot.h> 123 #include <sys/user.h> 124 #include <sys/mount.h> 125 #include <sys/kcore.h> 126 #include <sys/boot_flag.h> 127 #include <sys/termios.h> 128 #include <sys/ksyms.h> 129 130 #include <net/if.h> 131 #include <net/if_ether.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 <mips/cache.h> 145 #include <mips/locore.h> 146 #include <machine/yamon.h> 147 148 #include <evbmips/alchemy/board.h> 149 #include <mips/alchemy/dev/aupcivar.h> 150 #include <mips/alchemy/include/aureg.h> 151 #include <mips/alchemy/include/auvar.h> 152 #include <mips/alchemy/include/aubusvar.h> 153 154 #include "aucom.h" 155 #if NAUCOM > 0 156 #include <mips/alchemy/dev/aucomvar.h> 157 158 int aucomcnrate = 0; 159 #endif /* NAUCOM > 0 */ 160 161 #include "ohci.h" 162 163 /* The following are used externally (sysctl_hw). */ 164 extern char cpu_model[]; 165 166 struct user *proc0paddr; 167 168 /* Our exported CPU info; we can have only one. */ 169 struct cpu_info cpu_info_store; 170 171 /* Maps for VM objects. */ 172 struct vm_map *exec_map = NULL; 173 struct vm_map *mb_map = NULL; 174 struct vm_map *phys_map = NULL; 175 176 int physmem; /* # pages of physical memory */ 177 int maxmem; /* max memory per process */ 178 179 int mem_cluster_cnt; 180 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 181 182 yamon_env_var *yamon_envp; 183 struct mips_bus_space alchemy_cpuregt; 184 185 void mach_init(int, char **, yamon_env_var *, u_long); /* XXX */ 186 187 void 188 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 189 { 190 bus_space_handle_t sh; 191 caddr_t kernend; 192 const char *cp; 193 u_long first, last; 194 caddr_t v; 195 int freqok, howto, i; 196 const struct alchemy_board *board; 197 198 extern char edata[], end[]; /* XXX */ 199 200 board = board_info(); 201 KASSERT(board != NULL); 202 203 /* clear the BSS segment */ 204 kernend = (caddr_t)mips_round_page(end); 205 memset(edata, 0, kernend - (caddr_t)edata); 206 207 /* set CPU model info for sysctl_hw */ 208 strcpy(cpu_model, board->ab_name); 209 210 /* save the yamon environment pointer */ 211 yamon_envp = envp; 212 213 /* Use YAMON callbacks for early console I/O */ 214 cn_tab = &yamon_promcd; 215 216 /* 217 * Set up the exception vectors and CPU-specific function 218 * vectors early on. We need the wbflush() vector set up 219 * before comcnattach() is called (or at least before the 220 * first printf() after that is called). 221 * Sets up mips_cpu_flags that may be queried by other 222 * functions called during startup. 223 * Also clears the I+D caches. 224 */ 225 mips_vector_init(); 226 227 /* 228 * Set the VM page size. 229 */ 230 uvm_setpagesize(); 231 232 /* 233 * Use YAMON's CPU frequency if available. 234 */ 235 freqok = yamon_setcpufreq(1); 236 237 /* 238 * Initialize bus space tags. 239 */ 240 au_cpureg_bus_mem_init(&alchemy_cpuregt, &alchemy_cpuregt); 241 aubus_st = &alchemy_cpuregt; 242 243 /* 244 * Calibrate the timer if YAMON failed to tell us. 245 */ 246 if (!freqok) { 247 bus_space_map(aubus_st, PC_BASE, PC_SIZE, 0, &sh); 248 au_cal_timers(aubus_st, sh); 249 bus_space_unmap(aubus_st, sh, PC_SIZE); 250 } 251 252 /* 253 * Perform board-specific initialization. 254 */ 255 board->ab_init(); 256 257 /* 258 * Bring up the console. 259 */ 260 #if NAUCOM > 0 261 #ifdef CONSPEED 262 if (aucomcnrate == 0) 263 aucomcnrate = CONSPEED; 264 #else /* !CONSPEED */ 265 /* 266 * Learn default console speed. We use the YAMON environment, 267 * though we could probably also figure it out by checking the 268 * aucom registers directly. 269 */ 270 if ((aucomcnrate == 0) && ((cp = yamon_getenv("modetty0")) != NULL)) 271 aucomcnrate = strtoul(cp, NULL, 0); 272 273 if (aucomcnrate == 0) { 274 printf("FATAL: `modetty0' YAMON variable not set. Set it\n"); 275 printf(" to the speed of the console and try again.\n"); 276 printf(" Or, build a kernel with the `CONSPEED' " 277 "option.\n"); 278 panic("mach_init"); 279 } 280 #endif /* CONSPEED */ 281 282 /* 283 * Delay to allow firmware putchars to complete. 284 * FIFO depth * character time. 285 * character time = (1000000 / (defaultrate / 10)) 286 */ 287 delay(160000000 / aucomcnrate); 288 if (aucomcnattach(aubus_st, UART0_BASE, aucomcnrate, 289 curcpu()->ci_cpu_freq / 4, COM_TYPE_AU1x00, 290 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 291 panic("mach_init: unable to initialize serial console"); 292 #else 293 panic("mach_init: not configured to use serial console"); 294 #endif /* NAUCOM > 0 */ 295 296 /* 297 * Look at arguments passed to us and compute boothowto. 298 */ 299 boothowto = RB_AUTOBOOT; 300 #ifdef KADB 301 boothowto |= RB_KDB; 302 #endif 303 for (i = 1; i < argc; i++) { 304 for (cp = argv[i]; *cp; cp++) { 305 /* Ignore superfluous '-', if there is one */ 306 if (*cp == '-') 307 continue; 308 309 howto = 0; 310 BOOT_FLAG(*cp, howto); 311 if (! howto) 312 printf("bootflag '%c' not recognised\n", *cp); 313 else 314 boothowto |= howto; 315 } 316 } 317 318 /* 319 * Determine the memory size. Use the `memsize' PMON 320 * variable. If that's not available, panic. 321 * 322 * Note: Reserve the first page! That's where the trap 323 * vectors are located. 324 */ 325 326 #if defined(MEMSIZE) 327 memsize = MEMSIZE; 328 #else 329 if (memsize == 0) { 330 if ((cp = yamon_getenv("memsize")) != NULL) 331 memsize = strtoul(cp, NULL, 0); 332 else { 333 printf("FATAL: `memsize' YAMON variable not set. Set it to\n"); 334 printf(" the amount of memory (in MB) and try again.\n"); 335 printf(" Or, build a kernel with the `MEMSIZE' " 336 "option.\n"); 337 panic("mach_init"); 338 } 339 } 340 #endif /* MEMSIZE */ 341 printf("Memory size: 0x%08lx\n", memsize); 342 physmem = btoc(memsize); 343 344 mem_clusters[mem_cluster_cnt].start = PAGE_SIZE; 345 mem_clusters[mem_cluster_cnt].size = 346 memsize - mem_clusters[mem_cluster_cnt].start; 347 mem_cluster_cnt++; 348 349 /* 350 * Load the rest of the available pages into the VM system. 351 */ 352 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 353 last = mem_clusters[0].start + mem_clusters[0].size; 354 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 355 VM_FREELIST_DEFAULT); 356 357 /* 358 * Initialize message buffer (at end of core). 359 */ 360 mips_init_msgbuf(); 361 362 /* 363 * Initialize the virtual memory system. 364 */ 365 pmap_bootstrap(); 366 367 /* 368 * Init mapping for u page(s) for proc0. 369 */ 370 v = (caddr_t) uvm_pageboot_alloc(USPACE); 371 lwp0.l_addr = proc0paddr = (struct user *)v; 372 lwp0.l_md.md_regs = (struct frame *)(v + USPACE) - 1; 373 curpcb = &lwp0.l_addr->u_pcb; 374 curpcb->pcb_context[11] = MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ 375 376 /* 377 * Initialize debuggers, and break into them, if appropriate. 378 */ 379 #if NKSYMS || defined(DDB) || defined(LKM) 380 ksyms_init(0, 0, 0); 381 #endif 382 #ifdef DDB 383 if (boothowto & RB_KDB) 384 Debugger(); 385 #endif 386 } 387 388 void 389 consinit(void) 390 { 391 392 /* 393 * Everything related to console initialization is done 394 * in mach_init(). 395 */ 396 } 397 398 void 399 cpu_startup(void) 400 { 401 char pbuf[9]; 402 vaddr_t minaddr, maxaddr; 403 #ifdef DEBUG 404 extern int pmapdebug; /* XXX */ 405 int opmapdebug = pmapdebug; 406 407 pmapdebug = 0; /* Shut up pmap debug during bootstrap */ 408 #endif 409 410 /* 411 * Good {morning,afternoon,evening,night}. 412 */ 413 printf("%s%s", copyright, version); 414 printf("%s\n", cpu_model); 415 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 416 printf("total memory = %s\n", pbuf); 417 418 minaddr = 0; 419 /* 420 * Allocate a submap for exec arguments. This map effectively 421 * limits the number of processes exec'ing at any time. 422 */ 423 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 424 16 * NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 425 426 /* 427 * Allocate a submap for physio 428 */ 429 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 430 VM_PHYS_SIZE, 0, FALSE, NULL); 431 432 /* 433 * No need to allocate an mbuf cluster submap. Mbuf clusters 434 * are allocated via the pool allocator, and we use KSEG to 435 * map those pages. 436 */ 437 438 #ifdef DEBUG 439 pmapdebug = opmapdebug; 440 #endif 441 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 442 printf("avail memory = %s\n", pbuf); 443 } 444 445 void 446 cpu_reboot(int howto, char *bootstr) 447 { 448 static int waittime = -1; 449 const struct alchemy_board *board; 450 451 /* Take a snapshot before clobbering any registers. */ 452 if (curproc) 453 savectx((struct user *)curpcb); 454 455 board = board_info(); 456 KASSERT(board != NULL); 457 458 /* If "always halt" was specified as a boot flag, obey. */ 459 if (boothowto & RB_HALT) 460 howto |= RB_HALT; 461 462 boothowto = howto; 463 464 /* If system is cold, just halt. */ 465 if (cold) { 466 boothowto |= RB_HALT; 467 goto haltsys; 468 } 469 470 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 471 waittime = 0; 472 473 /* 474 * Synchronize the disks.... 475 */ 476 vfs_shutdown(); 477 478 /* 479 * If we've been adjusting the clock, the todr 480 * will be out of synch; adjust it now. 481 */ 482 resettodr(); 483 } 484 485 /* Disable interrupts. */ 486 splhigh(); 487 488 if (boothowto & RB_DUMP) 489 dumpsys(); 490 491 haltsys: 492 /* Run any shutdown hooks. */ 493 doshutdownhooks(); 494 495 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN) 496 if (board && board->ab_poweroff) 497 board->ab_poweroff(); 498 499 /* 500 * YAMON may autoboot (depending on settings), and we cannot pass 501 * flags to it (at least I haven't figured out how to yet), so 502 * we "pseudo-halt" now. 503 */ 504 if (boothowto & 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 /* 514 * Try to use board-specific reset logic, which might involve a better 515 * hardware reset. 516 */ 517 if (board->ab_reboot) 518 board->ab_reboot(); 519 520 #if 1 521 /* XXX 522 * For some reason we are leaving the ethernet MAC in a state where 523 * YAMON isn't happy with it. So just call the reset vector (grr, 524 * Alchemy YAMON doesn't have a "reset" command). 525 */ 526 printf("reseting board...\n\n"); 527 mips_icache_sync_all(); 528 mips_dcache_wbinv_all(); 529 __asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC)); 530 #else 531 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 532 yamon_exit(boothowto); 533 printf("Oops, back from yamon_exit()\n\nSpinning..."); 534 #endif 535 for (;;) 536 /* spin forever */ ; /* XXX */ 537 /*NOTREACHED*/ 538 } 539 540 /* 541 * Export our interrupt map function so aupci can find it. 542 */ 543 int 544 aupci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp) 545 { 546 const struct alchemy_board *board; 547 548 board = board_info(); 549 if (board->ab_pci_intr_map != NULL) 550 return (board->ab_pci_intr_map(pa, ihp)); 551 return 1; 552 } 553
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