machdep.c revision 1.23
1 /* $NetBSD: machdep.c,v 1.23 2010/12/15 00:04:51 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Urbana-Champaign Independent Media Center. 5 * Copyright (c) 2006 Garrett D'Amore. 6 * All rights reserved. 7 * 8 * Portions of this code were written by Garrett D'Amore for the 9 * Champaign-Urbana Community Wireless Network Project. 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer in the documentation and/or other materials provided 19 * with the distribution. 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgements: 22 * This product includes software developed by the Urbana-Champaign 23 * Independent Media Center. 24 * This product includes software developed by Garrett D'Amore. 25 * 4. Urbana-Champaign Independent Media Center's name and Garrett 26 * D'Amore's name may not be used to endorse or promote products 27 * derived from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT 30 * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR 31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 32 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT 34 * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT, 35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 */ 43 /*- 44 * Copyright (c) 2006 Itronix Inc. 45 * All rights reserved. 46 * 47 * Portions written by Garrett D'Amore for Itronix Inc. 48 * 49 * Redistribution and use in source and binary forms, with or without 50 * modification, are permitted provided that the following conditions 51 * are met: 52 * 1. Redistributions of source code must retain the above copyright 53 * notice, this list of conditions and the following disclaimer. 54 * 2. Redistributions in binary form must reproduce the above copyright 55 * notice, this list of conditions and the following disclaimer in the 56 * documentation and/or other materials provided with the distribution. 57 * 3. The name of Itronix Inc. may not be used to endorse 58 * or promote products derived from this software without specific 59 * prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 63 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 64 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY 65 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 66 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 67 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 68 * ON ANY THEORY OF LIABILITY, WHETHER IN 69 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 70 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 71 * POSSIBILITY OF SUCH DAMAGE. 72 */ 73 /* 74 * Copyright (c) 1992, 1993 75 * The Regents of the University of California. All rights reserved. 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. Neither the name of the University nor the names of its contributors 91 * may be used to endorse or promote products derived from this software 92 * without specific prior written permission. 93 * 94 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 95 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 96 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 97 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 98 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 99 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 100 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 101 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 102 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 103 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 104 * SUCH DAMAGE. 105 * 106 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 107 * from: Utah Hdr: machdep.c 1.63 91/04/24 108 */ 109 /* 110 * Copyright (c) 1988 University of Utah. 111 * 112 * This code is derived from software contributed to Berkeley by 113 * the Systems Programming Group of the University of Utah Computer 114 * Science Department, The Mach Operating System project at 115 * Carnegie-Mellon University and Ralph Campbell. 116 * 117 * Redistribution and use in source and binary forms, with or without 118 * modification, are permitted provided that the following conditions 119 * are met: 120 * 1. Redistributions of source code must retain the above copyright 121 * notice, this list of conditions and the following disclaimer. 122 * 2. Redistributions in binary form must reproduce the above copyright 123 * notice, this list of conditions and the following disclaimer in the 124 * documentation and/or other materials provided with the distribution. 125 * 3. All advertising materials mentioning features or use of this software 126 * must display the following acknowledgement: 127 * This product includes software developed by the University of 128 * California, Berkeley and its contributors. 129 * 4. Neither the name of the University nor the names of its contributors 130 * may be used to endorse or promote products derived from this software 131 * without specific prior written permission. 132 * 133 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 134 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 135 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 136 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 137 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 138 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 139 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 140 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 141 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 142 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 143 * SUCH DAMAGE. 144 * 145 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 146 * from: Utah Hdr: machdep.c 1.63 91/04/24 147 */ 148 149 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 150 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.23 2010/12/15 00:04:51 matt Exp $"); 151 152 #include "opt_ddb.h" 153 #include "opt_kgdb.h" 154 #include "opt_modular.h" 155 156 #include <sys/param.h> 157 #include <sys/systm.h> 158 #include <sys/kernel.h> 159 #include <sys/buf.h> 160 #include <sys/reboot.h> 161 #include <sys/mount.h> 162 #include <sys/kcore.h> 163 #include <sys/boot_flag.h> 164 #include <sys/termios.h> 165 #include <sys/ksyms.h> 166 #include <sys/device.h> 167 168 #include <uvm/uvm_extern.h> 169 170 #include <dev/cons.h> 171 172 #include "ksyms.h" 173 174 #if NKSYMS || defined(DDB) || defined(MODULAR) 175 #include <machine/db_machdep.h> 176 #include <ddb/db_extern.h> 177 #endif 178 179 #include <mips/cache.h> 180 #include <mips/locore.h> 181 #include <mips/cpuregs.h> 182 183 #include <mips/atheros/include/ar531xvar.h> 184 #include <mips/atheros/include/arbusvar.h> 185 186 /* Our exported CPU info; we can have only one. */ 187 struct cpu_info cpu_info_store; 188 189 /* Maps for VM objects. */ 190 struct vm_map *phys_map = NULL; 191 192 int maxmem; /* max memory per process */ 193 194 int mem_cluster_cnt; 195 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 196 197 void mach_init(void); /* XXX */ 198 199 static void 200 cal_timer(void) 201 { 202 uint32_t cntfreq; 203 204 cntfreq = curcpu()->ci_cpu_freq = ar531x_cpu_freq(); 205 206 /* MIPS 4Kc CP0 counts every other clock */ 207 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 208 cntfreq /= 2; 209 210 curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz; 211 212 /* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */ 213 curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000); 214 } 215 216 void 217 mach_init(void) 218 { 219 void *kernend; 220 u_long first, last; 221 uint32_t memsize; 222 223 extern char edata[], end[]; /* XXX */ 224 225 /* clear the BSS segment */ 226 kernend = (void *)mips_round_page(end); 227 228 memset(edata, 0, (char *)kernend - edata); 229 230 /* setup early console */ 231 ar531x_early_console(); 232 233 /* set CPU model info for sysctl_hw */ 234 snprintf(cpu_model, 64, "%s", ar531x_cpuname()); 235 236 /* 237 * Set up the exception vectors and CPU-specific function 238 * vectors early on. We need the wbflush() vector set up 239 * before comcnattach() is called (or at least before the 240 * first printf() after that is called). 241 * Sets up mips_cpu_flags that may be queried by other 242 * functions called during startup. 243 * Also clears the I+D caches. 244 */ 245 mips_vector_init(); 246 247 /* 248 * Calibrate timers. 249 */ 250 cal_timer(); 251 252 /* 253 * Set the VM page size. 254 */ 255 uvm_setpagesize(); 256 257 /* 258 * Look at arguments passed to us and compute boothowto. 259 */ 260 boothowto = RB_AUTOBOOT; 261 #ifdef KADB 262 boothowto |= RB_KDB; 263 #endif 264 265 /* 266 * This would be a good place to parse a boot command line, if 267 * we got one from the bootloader. Right now we have no way to 268 * get one from e.g. vxworks. 269 */ 270 271 /* 272 * Determine the memory size. 273 * 274 * Note: Reserve the first page! That's where the trap 275 * vectors are located. 276 */ 277 memsize = ar531x_memsize(); 278 279 printf("Memory size: 0x%08x\n", memsize); 280 physmem = btoc(memsize); 281 282 mem_clusters[mem_cluster_cnt].start = PAGE_SIZE; 283 mem_clusters[mem_cluster_cnt].size = 284 memsize - mem_clusters[mem_cluster_cnt].start; 285 mem_cluster_cnt++; 286 287 /* 288 * Load the rest of the available pages into the VM system. 289 */ 290 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 291 last = mem_clusters[0].start + mem_clusters[0].size; 292 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 293 VM_FREELIST_DEFAULT); 294 295 /* 296 * Initialize message buffer (at end of core). 297 */ 298 mips_init_msgbuf(); 299 300 /* 301 * Initialize the virtual memory system. 302 */ 303 pmap_bootstrap(); 304 305 /* 306 * Allocate uarea page for lwp0 and set it. 307 */ 308 mips_init_lwp0_uarea(); 309 310 /* 311 * Initialize busses. 312 */ 313 ar531x_businit(); 314 315 /* 316 * Turn off (ignore) the hardware watchdog. If we got this 317 * far, then we shouldn't need it anymore. 318 */ 319 ar531x_wdog(0); 320 321 /* 322 * Turn off watchpoint that may have been enabled by the 323 * PROM. VxWorks bootloader seems to leave one set. 324 */ 325 __asm volatile ( 326 "mtc0 $0, $" ___STRING(MIPS_COP_0_WATCH_LO) " \n\t" 327 "nop\n\t" 328 "nop\n\t"); 329 330 /* 331 * Initialize debuggers, and break into them, if appropriate. 332 */ 333 #ifdef 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 ar531x_consinit(); 348 } 349 350 void 351 cpu_startup(void) 352 { 353 char pbuf[9]; 354 vaddr_t minaddr, maxaddr; 355 #ifdef DEBUG 356 extern int pmapdebug; /* XXX */ 357 int opmapdebug = pmapdebug; 358 359 pmapdebug = 0; /* Shut up pmap debug during bootstrap */ 360 #endif 361 362 /* 363 * Good {morning,afternoon,evening,night}. 364 */ 365 printf("%s%s", copyright, version); 366 printf("%s\n", cpu_model); 367 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 368 printf("total memory = %s\n", pbuf); 369 370 minaddr = 0; 371 /* 372 * Allocate a submap for physio 373 */ 374 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 375 VM_PHYS_SIZE, 0, FALSE, NULL); 376 377 /* 378 * No need to allocate an mbuf cluster submap. Mbuf clusters 379 * are allocated via the pool allocator, and we use KSEG to 380 * map those pages. 381 */ 382 383 #ifdef DEBUG 384 pmapdebug = opmapdebug; 385 #endif 386 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 387 printf("avail memory = %s\n", pbuf); 388 } 389 390 void 391 cpu_reboot(int howto, char *bootstr) 392 { 393 static int waittime = -1; 394 395 /* Take a snapshot before clobbering any registers. */ 396 if (curproc) 397 savectx(curpcb); 398 399 /* If "always halt" was specified as a boot flag, obey. */ 400 if (boothowto & RB_HALT) 401 howto |= RB_HALT; 402 403 boothowto = howto; 404 405 /* If system is cold, just halt. */ 406 if (cold) { 407 boothowto |= RB_HALT; 408 goto haltsys; 409 } 410 411 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 412 waittime = 0; 413 414 /* 415 * Synchronize the disks.... 416 */ 417 vfs_shutdown(); 418 419 /* 420 * If we've been adjusting the clock, the todr 421 * will be out of synch; adjust it now. 422 */ 423 resettodr(); 424 } 425 426 /* Disable interrupts. */ 427 splhigh(); 428 429 if (boothowto & RB_DUMP) 430 dumpsys(); 431 432 haltsys: 433 /* Run any shutdown hooks. */ 434 doshutdownhooks(); 435 436 pmf_system_shutdown(boothowto); 437 438 #if 0 439 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN) 440 if (board && board->ab_poweroff) 441 board->ab_poweroff(); 442 #endif 443 444 /* 445 * Firmware may autoboot (depending on settings), and we cannot pass 446 * flags to it (at least I haven't figured out how to yet), so 447 * we "pseudo-halt" now. 448 */ 449 if (boothowto & RB_HALT) { 450 printf("\n"); 451 printf("The operating system has halted.\n"); 452 printf("Please press any key to reboot.\n\n"); 453 cnpollc(1); /* For proper keyboard command handling */ 454 cngetc(); 455 cnpollc(0); 456 } 457 458 printf("reseting board...\n\n"); 459 mips_icache_sync_all(); 460 mips_dcache_wbinv_all(); 461 __asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC)); 462 printf("Oops, back from reset\n\nSpinning..."); 463 for (;;) 464 /* spin forever */ ; /* XXX */ 465 /*NOTREACHED*/ 466 } 467
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