machdep.c revision 1.27.6.1
1 /* $NetBSD: machdep.c,v 1.27.6.1 2012/03/04 00:46:04 mrg 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 1.27.6.1 2012/03/04 00:46:04 mrg 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/boot_flag.h> 121 #include <sys/device.h> 122 #include <sys/kernel.h> 123 #include <sys/kcore.h> 124 #include <sys/ksyms.h> 125 #include <sys/mount.h> 126 #include <sys/reboot.h> 127 128 #include <uvm/uvm_extern.h> 129 130 #include <dev/cons.h> 131 132 #include "ksyms.h" 133 134 #if NKSYMS || defined(DDB) || defined(MODULAR) 135 #include <mips/db_machdep.h> 136 #include <ddb/db_extern.h> 137 #endif 138 139 #include <mips/cache.h> 140 #include <mips/locore.h> 141 #include <mips/cpuregs.h> 142 143 #include <mips/atheros/include/platform.h> 144 #include <mips/atheros/include/arbusvar.h> 145 146 /* Maps for VM objects. */ 147 struct vm_map *phys_map = NULL; 148 149 int maxmem; /* max memory per process */ 150 151 int mem_cluster_cnt; 152 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 153 154 void mach_init(void); /* XXX */ 155 156 static void 157 cal_timer(void) 158 { 159 uint32_t cntfreq; 160 161 cntfreq = curcpu()->ci_cpu_freq = atheros_get_cpu_freq(); 162 163 /* MIPS 4Kc CP0 counts every other clock */ 164 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 165 cntfreq /= 2; 166 167 curcpu()->ci_cctr_freq = cntfreq; 168 curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz; 169 170 /* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */ 171 curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000); 172 } 173 174 void 175 mach_init(void) 176 { 177 void *kernend; 178 uint32_t memsize; 179 180 extern char edata[], end[]; /* XXX */ 181 182 /* clear the BSS segment */ 183 kernend = (void *)mips_round_page(end); 184 185 memset(edata, 0, (char *)kernend - edata); 186 187 /* setup early console */ 188 atheros_set_platformsw(); 189 190 /* set CPU model info for sysctl_hw */ 191 snprintf(cpu_model, 64, "Atheros %s", atheros_get_cpuname()); 192 193 /* 194 * Set up the exception vectors and CPU-specific function 195 * vectors early on. We need the wbflush() vector set up 196 * before comcnattach() is called (or at least before the 197 * first printf() after that is called). 198 * Sets up mips_cpu_flags that may be queried by other 199 * functions called during startup. 200 * Also clears the I+D caches. 201 */ 202 mips_vector_init(NULL, false); 203 204 /* 205 * Calibrate timers. 206 */ 207 cal_timer(); 208 209 /* 210 * Set the VM page size. 211 */ 212 uvm_setpagesize(); 213 214 /* 215 * Look at arguments passed to us and compute boothowto. 216 */ 217 boothowto = RB_AUTOBOOT; 218 #ifdef KADB 219 boothowto |= RB_KDB; 220 #endif 221 222 /* 223 * This would be a good place to parse a boot command line, if 224 * we got one from the bootloader. Right now we have no way to 225 * get one from e.g. vxworks. 226 */ 227 228 /* 229 * Determine the memory size. 230 * 231 * Note: Reserve the first page! That's where the trap 232 * vectors are located. 233 */ 234 memsize = atheros_get_memsize(); 235 236 printf("Memory size: 0x%08x\n", memsize); 237 physmem = btoc(memsize); 238 239 mem_clusters[mem_cluster_cnt].start = PAGE_SIZE; 240 mem_clusters[mem_cluster_cnt].size = 241 memsize - mem_clusters[mem_cluster_cnt].start; 242 mem_cluster_cnt++; 243 244 /* 245 * Load the available pages into the VM system. 246 */ 247 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 248 mem_clusters, mem_cluster_cnt, NULL, 0); 249 250 /* 251 * Initialize message buffer (at end of core). 252 */ 253 mips_init_msgbuf(); 254 255 /* 256 * Initialize the virtual memory system. 257 */ 258 pmap_bootstrap(); 259 260 /* 261 * Allocate uarea page for lwp0 and set it. 262 */ 263 mips_init_lwp0_uarea(); 264 265 /* 266 * Initialize busses. 267 */ 268 atheros_bus_init(); 269 270 /* 271 * Turn off (ignore) the hardware watchdog. If we got this 272 * far, then we shouldn't need it anymore. 273 */ 274 atheros_wdog_reload(0); 275 276 /* 277 * Turn off watchpoint that may have been enabled by the 278 * PROM. VxWorks bootloader seems to leave one set. 279 */ 280 __asm volatile ( 281 "mtc0 $0, $%0\n\t" 282 "nop\n\t" 283 "nop\n\t" :: "n"(MIPS_COP_0_WATCH_LO)); 284 285 /* 286 * Initialize debuggers, and break into them, if appropriate. 287 */ 288 #ifdef DDB 289 if (boothowto & RB_KDB) 290 Debugger(); 291 #endif 292 } 293 294 void 295 consinit(void) 296 { 297 298 /* 299 * Everything related to console initialization is done 300 * in mach_init(). 301 */ 302 atheros_consinit(); 303 } 304 305 void 306 cpu_startup(void) 307 { 308 char pbuf[9]; 309 vaddr_t minaddr, maxaddr; 310 #ifdef DEBUG 311 extern int pmapdebug; /* XXX */ 312 int opmapdebug = pmapdebug; 313 314 pmapdebug = 0; /* Shut up pmap debug during bootstrap */ 315 #endif 316 317 /* 318 * Good {morning,afternoon,evening,night}. 319 */ 320 printf("%s%s", copyright, version); 321 printf("%s\n", cpu_model); 322 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 323 printf("total memory = %s\n", pbuf); 324 325 minaddr = 0; 326 /* 327 * Allocate a submap for physio 328 */ 329 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 330 VM_PHYS_SIZE, 0, FALSE, NULL); 331 332 /* 333 * No need to allocate an mbuf cluster submap. Mbuf clusters 334 * are allocated via the pool allocator, and we use KSEG to 335 * map those pages. 336 */ 337 338 #ifdef DEBUG 339 pmapdebug = opmapdebug; 340 #endif 341 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 342 printf("avail memory = %s\n", pbuf); 343 } 344 345 void 346 cpu_reboot(int howto, char *bootstr) 347 { 348 static int waittime = -1; 349 350 /* Take a snapshot before clobbering any registers. */ 351 savectx(curpcb); 352 353 /* If "always halt" was specified as a boot flag, obey. */ 354 if (boothowto & RB_HALT) 355 howto |= RB_HALT; 356 357 boothowto = howto; 358 359 /* If system is cold, just halt. */ 360 if (cold) { 361 boothowto |= RB_HALT; 362 goto haltsys; 363 } 364 365 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 366 waittime = 0; 367 368 /* 369 * Synchronize the disks.... 370 */ 371 vfs_shutdown(); 372 373 /* 374 * If we've been adjusting the clock, the todr 375 * will be out of synch; adjust it now. 376 */ 377 resettodr(); 378 } 379 380 /* Disable interrupts. */ 381 splhigh(); 382 383 if (boothowto & RB_DUMP) 384 dumpsys(); 385 386 haltsys: 387 /* Run any shutdown hooks. */ 388 doshutdownhooks(); 389 390 pmf_system_shutdown(boothowto); 391 392 #if 0 393 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN) 394 if (board && board->ab_poweroff) 395 board->ab_poweroff(); 396 #endif 397 398 /* 399 * Firmware may autoboot (depending on settings), and we cannot pass 400 * flags to it (at least I haven't figured out how to yet), so 401 * we "pseudo-halt" now. 402 */ 403 if (boothowto & RB_HALT) { 404 printf("\n"); 405 printf("The operating system has halted.\n"); 406 printf("Please press any key to reboot.\n\n"); 407 cnpollc(1); /* For proper keyboard command handling */ 408 cngetc(); 409 cnpollc(0); 410 } 411 412 printf("reseting board...\n\n"); 413 mips_icache_sync_all(); 414 mips_dcache_wbinv_all(); 415 atheros_reset(); 416 __asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC)); 417 printf("Oops, back from reset\n\nSpinning..."); 418 for (;;) 419 /* spin forever */ ; /* XXX */ 420 /*NOTREACHED*/ 421 } 422
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