machdep.c revision 1.25
1 /* $NetBSD: machdep.c,v 1.25 2011/02/20 07:48:33 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 /* 75 * Copyright (c) 1988 University of Utah. 76 * Copyright (c) 1992, 1993 77 * The Regents of the University of California. All rights reserved. 78 * 79 * This code is derived from software contributed to Berkeley by 80 * the Systems Programming Group of the University of Utah Computer 81 * Science Department, The Mach Operating System project at 82 * Carnegie-Mellon University and Ralph Campbell. 83 * 84 * Redistribution and use in source and binary forms, with or without 85 * modification, are permitted provided that the following conditions 86 * are met: 87 * 1. Redistributions of source code must retain the above copyright 88 * notice, this list of conditions and the following disclaimer. 89 * 2. Redistributions in binary form must reproduce the above copyright 90 * notice, this list of conditions and the following disclaimer in the 91 * documentation and/or other materials provided with the distribution. 92 * 3. Neither the name of the University nor the names of its contributors 93 * may be used to endorse or promote products derived from this software 94 * without specific prior written permission. 95 * 96 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 97 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 98 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 99 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 100 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 101 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 102 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 103 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 104 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 105 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 106 * SUCH DAMAGE. 107 * 108 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 109 * from: Utah Hdr: machdep.c 1.63 91/04/24 110 */ 111 112 #include <sys/cdefs.h> 113 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.25 2011/02/20 07:48:33 matt Exp $"); 114 115 #include "opt_ddb.h" 116 #include "opt_kgdb.h" 117 #include "opt_modular.h" 118 119 #include <sys/param.h> 120 #include <sys/systm.h> 121 #include <sys/kernel.h> 122 #include <sys/buf.h> 123 #include <sys/reboot.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 #include <sys/device.h> 130 131 #include <uvm/uvm_extern.h> 132 133 #include <dev/cons.h> 134 135 #include "ksyms.h" 136 137 #if NKSYMS || defined(DDB) || defined(MODULAR) 138 #include <machine/db_machdep.h> 139 #include <ddb/db_extern.h> 140 #endif 141 142 #include <mips/cache.h> 143 #include <mips/locore.h> 144 #include <mips/cpuregs.h> 145 146 #include <mips/atheros/include/ar531xvar.h> 147 #include <mips/atheros/include/arbusvar.h> 148 149 /* Maps for VM objects. */ 150 struct vm_map *phys_map = NULL; 151 152 int physmem; /* # pages of physical memory */ 153 int maxmem; /* max memory per process */ 154 155 int mem_cluster_cnt; 156 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 157 158 void mach_init(void); /* XXX */ 159 160 static void 161 cal_timer(void) 162 { 163 uint32_t cntfreq; 164 165 cntfreq = curcpu()->ci_cpu_freq = ar531x_cpu_freq(); 166 167 /* MIPS 4Kc CP0 counts every other clock */ 168 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 169 cntfreq /= 2; 170 171 curcpu()->ci_cctr_freq = cntfreq; 172 curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz; 173 174 /* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */ 175 curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000); 176 } 177 178 void 179 mach_init(void) 180 { 181 void *kernend; 182 uint32_t memsize; 183 184 extern char edata[], end[]; /* XXX */ 185 186 /* clear the BSS segment */ 187 kernend = (void *)mips_round_page(end); 188 189 memset(edata, 0, (char *)kernend - edata); 190 191 /* setup early console */ 192 ar531x_early_console(); 193 194 /* set CPU model info for sysctl_hw */ 195 snprintf(cpu_model, 64, "%s", ar531x_cpuname()); 196 197 /* 198 * Set up the exception vectors and CPU-specific function 199 * vectors early on. We need the wbflush() vector set up 200 * before comcnattach() is called (or at least before the 201 * first printf() after that is called). 202 * Sets up mips_cpu_flags that may be queried by other 203 * functions called during startup. 204 * Also clears the I+D caches. 205 */ 206 mips_vector_init(NULL, false); 207 208 /* 209 * Calibrate timers. 210 */ 211 cal_timer(); 212 213 /* 214 * Set the VM page size. 215 */ 216 uvm_setpagesize(); 217 218 /* 219 * Look at arguments passed to us and compute boothowto. 220 */ 221 boothowto = RB_AUTOBOOT; 222 #ifdef KADB 223 boothowto |= RB_KDB; 224 #endif 225 226 /* 227 * This would be a good place to parse a boot command line, if 228 * we got one from the bootloader. Right now we have no way to 229 * get one from e.g. vxworks. 230 */ 231 232 /* 233 * Determine the memory size. 234 * 235 * Note: Reserve the first page! That's where the trap 236 * vectors are located. 237 */ 238 memsize = ar531x_memsize(); 239 240 printf("Memory size: 0x%08x\n", memsize); 241 physmem = btoc(memsize); 242 243 mem_clusters[mem_cluster_cnt].start = PAGE_SIZE; 244 mem_clusters[mem_cluster_cnt].size = 245 memsize - mem_clusters[mem_cluster_cnt].start; 246 mem_cluster_cnt++; 247 248 /* 249 * Load the available pages into the VM system. 250 */ 251 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 252 mem_clusters, mem_cluster_cnt, NULL, 0); 253 254 /* 255 * Initialize message buffer (at end of core). 256 */ 257 mips_init_msgbuf(); 258 259 /* 260 * Initialize the virtual memory system. 261 */ 262 pmap_bootstrap(); 263 264 /* 265 * Allocate uarea page for lwp0 and set it. 266 */ 267 mips_init_lwp0_uarea(); 268 269 /* 270 * Initialize busses. 271 */ 272 ar531x_businit(); 273 274 /* 275 * Turn off (ignore) the hardware watchdog. If we got this 276 * far, then we shouldn't need it anymore. 277 */ 278 ar531x_wdog(0); 279 280 /* 281 * Turn off watchpoint that may have been enabled by the 282 * PROM. VxWorks bootloader seems to leave one set. 283 */ 284 __asm volatile ( 285 "mtc0 $0, $%0\n\t" 286 "nop\n\t" 287 "nop\n\t" :: "n"(MIPS_COP_0_WATCH_LO)); 288 289 /* 290 * Initialize debuggers, and break into them, if appropriate. 291 */ 292 #ifdef DDB 293 if (boothowto & RB_KDB) 294 Debugger(); 295 #endif 296 } 297 298 void 299 consinit(void) 300 { 301 302 /* 303 * Everything related to console initialization is done 304 * in mach_init(). 305 */ 306 ar531x_consinit(); 307 } 308 309 void 310 cpu_startup(void) 311 { 312 char pbuf[9]; 313 vaddr_t minaddr, maxaddr; 314 #ifdef DEBUG 315 extern int pmapdebug; /* XXX */ 316 int opmapdebug = pmapdebug; 317 318 pmapdebug = 0; /* Shut up pmap debug during bootstrap */ 319 #endif 320 321 /* 322 * Good {morning,afternoon,evening,night}. 323 */ 324 printf("%s%s", copyright, version); 325 printf("%s\n", cpu_model); 326 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 327 printf("total memory = %s\n", pbuf); 328 329 minaddr = 0; 330 /* 331 * Allocate a submap for physio 332 */ 333 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 334 VM_PHYS_SIZE, 0, FALSE, NULL); 335 336 /* 337 * No need to allocate an mbuf cluster submap. Mbuf clusters 338 * are allocated via the pool allocator, and we use KSEG to 339 * map those pages. 340 */ 341 342 #ifdef DEBUG 343 pmapdebug = opmapdebug; 344 #endif 345 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 346 printf("avail memory = %s\n", pbuf); 347 } 348 349 void 350 cpu_reboot(int howto, char *bootstr) 351 { 352 static int waittime = -1; 353 354 /* Take a snapshot before clobbering any registers. */ 355 savectx(curpcb); 356 357 /* If "always halt" was specified as a boot flag, obey. */ 358 if (boothowto & RB_HALT) 359 howto |= RB_HALT; 360 361 boothowto = howto; 362 363 /* If system is cold, just halt. */ 364 if (cold) { 365 boothowto |= RB_HALT; 366 goto haltsys; 367 } 368 369 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 370 waittime = 0; 371 372 /* 373 * Synchronize the disks.... 374 */ 375 vfs_shutdown(); 376 377 /* 378 * If we've been adjusting the clock, the todr 379 * will be out of synch; adjust it now. 380 */ 381 resettodr(); 382 } 383 384 /* Disable interrupts. */ 385 splhigh(); 386 387 if (boothowto & RB_DUMP) 388 dumpsys(); 389 390 haltsys: 391 /* Run any shutdown hooks. */ 392 doshutdownhooks(); 393 394 pmf_system_shutdown(boothowto); 395 396 #if 0 397 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN) 398 if (board && board->ab_poweroff) 399 board->ab_poweroff(); 400 #endif 401 402 /* 403 * Firmware may autoboot (depending on settings), and we cannot pass 404 * flags to it (at least I haven't figured out how to yet), so 405 * we "pseudo-halt" now. 406 */ 407 if (boothowto & RB_HALT) { 408 printf("\n"); 409 printf("The operating system has halted.\n"); 410 printf("Please press any key to reboot.\n\n"); 411 cnpollc(1); /* For proper keyboard command handling */ 412 cngetc(); 413 cnpollc(0); 414 } 415 416 printf("reseting board...\n\n"); 417 mips_icache_sync_all(); 418 mips_dcache_wbinv_all(); 419 __asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC)); 420 printf("Oops, back from reset\n\nSpinning..."); 421 for (;;) 422 /* spin forever */ ; /* XXX */ 423 /*NOTREACHED*/ 424 } 425
Indexes created Mon Oct 27 17:09:47 GMT 2025