machdep.c revision 1.13.10.3
1 /* $NetBSD: machdep.c,v 1.13.10.3 2010/01/10 02:48:45 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 1.13.10.3 2010/01/10 02:48:45 matt Exp $"); 151 152 #include "opt_ddb.h" 153 #include "opt_kgdb.h" 154 155 #include <sys/param.h> 156 #include <sys/systm.h> 157 #include <sys/kernel.h> 158 #include <sys/buf.h> 159 #include <sys/reboot.h> 160 #include <sys/user.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> 166 167 #include <uvm/uvm_extern.h> 168 169 #include <dev/cons.h> 170 171 #include "ksyms.h" 172 173 #if NKSYMS || defined(DDB) || defined(LKM) 174 #include <machine/db_machdep.h> 175 #include <ddb/db_extern.h> 176 #endif 177 178 #include <mips/cache.h> 179 #include <mips/locore.h> 180 #include <mips/cpuregs.h> 181 182 #include <mips/atheros/include/ar531xvar.h> 183 #include <mips/atheros/include/arbusvar.h> 184 185 /* Maps for VM objects. */ 186 struct vm_map *mb_map = NULL; 187 struct vm_map *phys_map = NULL; 188 189 int physmem; /* # pages of physical memory */ 190 int maxmem; /* max memory per process */ 191 192 int mem_cluster_cnt; 193 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 194 195 void mach_init(void); /* XXX */ 196 197 static void 198 cal_timer(void) 199 { 200 uint32_t cntfreq; 201 202 cntfreq = curcpu()->ci_cpu_freq = ar531x_cpu_freq(); 203 204 /* MIPS 4Kc CP0 counts every other clock */ 205 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 206 cntfreq /= 2; 207 208 curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz; 209 210 /* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */ 211 curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000); 212 } 213 214 void 215 mach_init(void) 216 { 217 void *kernend; 218 uint32_t memsize; 219 220 extern char edata[], end[]; /* XXX */ 221 222 /* clear the BSS segment */ 223 kernend = (void *)mips_round_page(end); 224 225 memset(edata, 0, (char *)kernend - edata); 226 227 /* setup early console */ 228 ar531x_early_console(); 229 230 /* set CPU model info for sysctl_hw */ 231 snprintf(cpu_model, 64, "%s", ar531x_cpuname()); 232 233 /* 234 * Set up the exception vectors and CPU-specific function 235 * vectors early on. We need the wbflush() vector set up 236 * before comcnattach() is called (or at least before the 237 * first printf() after that is called). 238 * Sets up mips_cpu_flags that may be queried by other 239 * functions called during startup. 240 * Also clears the I+D caches. 241 */ 242 mips_vector_init(); 243 244 /* 245 * Calibrate timers. 246 */ 247 cal_timer(); 248 249 /* 250 * Set the VM page size. 251 */ 252 uvm_setpagesize(); 253 254 /* 255 * Look at arguments passed to us and compute boothowto. 256 */ 257 boothowto = RB_AUTOBOOT; 258 #ifdef KADB 259 boothowto |= RB_KDB; 260 #endif 261 262 /* 263 * This would be a good place to parse a boot command line, if 264 * we got one from the bootloader. Right now we have no way to 265 * get one from e.g. vxworks. 266 */ 267 268 /* 269 * Determine the memory size. 270 * 271 * Note: Reserve the first page! That's where the trap 272 * vectors are located. 273 */ 274 memsize = ar531x_memsize(); 275 276 printf("Memory size: 0x%08x\n", memsize); 277 physmem = btoc(memsize); 278 279 mem_clusters[mem_cluster_cnt].start = PAGE_SIZE; 280 mem_clusters[mem_cluster_cnt].size = 281 memsize - mem_clusters[mem_cluster_cnt].start; 282 mem_cluster_cnt++; 283 284 /* 285 * Load the available pages into the VM system. 286 */ 287 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 288 mem_clusters, mem_cluster_cnt, NULL, 0); 289 290 /* 291 * Initialize message buffer (at end of core). 292 */ 293 mips_init_msgbuf(); 294 295 /* 296 * Initialize the virtual memory system. 297 */ 298 pmap_bootstrap(); 299 300 /* 301 * Init mapping for u page(s) for proc0. 302 */ 303 mips_init_lwp0_uarea(); 304 305 /* 306 * Initialize busses. 307 */ 308 ar531x_businit(); 309 310 /* 311 * Turn off (ignore) the hardware watchdog. If we got this 312 * far, then we shouldn't need it anymore. 313 */ 314 ar531x_wdog(0); 315 316 /* 317 * Turn off watchpoint that may have been enabled by the 318 * PROM. VxWorks bootloader seems to leave one set. 319 */ 320 __asm volatile ( 321 "mtc0 $0, $%0\n\t" 322 "nop\n\t" 323 "nop\n\t" :: "n"(MIPS_COP_0_WATCH_LO)); 324 325 /* 326 * Initialize debuggers, and break into them, if appropriate. 327 */ 328 #if NKSYMS || defined(DDB) || defined(LKM) 329 ksyms_init(0, 0, 0); 330 #endif 331 332 #ifdef DDB 333 if (boothowto & RB_KDB) 334 Debugger(); 335 #endif 336 } 337 338 void 339 consinit(void) 340 { 341 342 /* 343 * Everything related to console initialization is done 344 * in mach_init(). 345 */ 346 ar531x_consinit(); 347 } 348 349 void 350 cpu_startup(void) 351 { 352 char pbuf[9]; 353 vaddr_t minaddr, maxaddr; 354 #ifdef DEBUG 355 extern int pmapdebug; /* XXX */ 356 int opmapdebug = pmapdebug; 357 358 pmapdebug = 0; /* Shut up pmap debug during bootstrap */ 359 #endif 360 361 /* 362 * Good {morning,afternoon,evening,night}. 363 */ 364 printf("%s%s", copyright, version); 365 printf("%s\n", cpu_model); 366 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 367 printf("total memory = %s\n", pbuf); 368 369 minaddr = 0; 370 /* 371 * Allocate a submap for physio 372 */ 373 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 374 VM_PHYS_SIZE, 0, FALSE, NULL); 375 376 /* 377 * No need to allocate an mbuf cluster submap. Mbuf clusters 378 * are allocated via the pool allocator, and we use KSEG to 379 * map those pages. 380 */ 381 382 #ifdef DEBUG 383 pmapdebug = opmapdebug; 384 #endif 385 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 386 printf("avail memory = %s\n", pbuf); 387 } 388 389 void 390 cpu_reboot(int howto, char *bootstr) 391 { 392 static int waittime = -1; 393 394 /* Take a snapshot before clobbering any registers. */ 395 if (curproc) 396 savectx((struct user *)curpcb); 397 398 /* If "always halt" was specified as a boot flag, obey. */ 399 if (boothowto & RB_HALT) 400 howto |= RB_HALT; 401 402 boothowto = howto; 403 404 /* If system is cold, just halt. */ 405 if (cold) { 406 boothowto |= RB_HALT; 407 goto haltsys; 408 } 409 410 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 411 waittime = 0; 412 413 /* 414 * Synchronize the disks.... 415 */ 416 vfs_shutdown(); 417 418 /* 419 * If we've been adjusting the clock, the todr 420 * will be out of synch; adjust it now. 421 */ 422 resettodr(); 423 } 424 425 /* Disable interrupts. */ 426 splhigh(); 427 428 if (boothowto & RB_DUMP) 429 dumpsys(); 430 431 haltsys: 432 /* Run any shutdown hooks. */ 433 doshutdownhooks(); 434 435 #if 0 436 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN) 437 if (board && board->ab_poweroff) 438 board->ab_poweroff(); 439 #endif 440 441 /* 442 * Firmware may autoboot (depending on settings), and we cannot pass 443 * flags to it (at least I haven't figured out how to yet), so 444 * we "pseudo-halt" now. 445 */ 446 if (boothowto & RB_HALT) { 447 printf("\n"); 448 printf("The operating system has halted.\n"); 449 printf("Please press any key to reboot.\n\n"); 450 cnpollc(1); /* For proper keyboard command handling */ 451 cngetc(); 452 cnpollc(0); 453 } 454 455 printf("reseting board...\n\n"); 456 mips_icache_sync_all(); 457 mips_dcache_wbinv_all(); 458 __asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC)); 459 printf("Oops, back from reset\n\nSpinning..."); 460 for (;;) 461 /* spin forever */ ; /* XXX */ 462 /*NOTREACHED*/ 463 } 464
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