machdep.c revision 1.28.4.1
1 /* $NetBSD: machdep.c,v 1.28.4.1 2014/05/18 17:45:06 rmind 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 1.28.4.1 2014/05/18 17:45:06 rmind 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 #include <sys/cpu.h> 128 129 #include <uvm/uvm_extern.h> 130 131 #include <dev/cons.h> 132 133 #include "ksyms.h" 134 135 #if NKSYMS || defined(DDB) || defined(MODULAR) 136 #include <mips/db_machdep.h> 137 #include <ddb/db_extern.h> 138 #endif 139 140 #include <mips/cache.h> 141 #include <mips/locore.h> 142 #include <mips/cpuregs.h> 143 144 #include <mips/atheros/include/platform.h> 145 #include <mips/atheros/include/arbusvar.h> 146 147 /* Maps for VM objects. */ 148 struct vm_map *phys_map = NULL; 149 150 int maxmem; /* max memory per process */ 151 152 int mem_cluster_cnt; 153 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 154 155 void mach_init(void); /* XXX */ 156 157 static void 158 cal_timer(void) 159 { 160 uint32_t cntfreq; 161 162 cntfreq = curcpu()->ci_cpu_freq = atheros_get_cpu_freq(); 163 164 /* MIPS 4Kc CP0 counts every other clock */ 165 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 166 cntfreq /= 2; 167 168 curcpu()->ci_cctr_freq = cntfreq; 169 curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz; 170 171 /* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */ 172 curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000); 173 } 174 175 void 176 mach_init(void) 177 { 178 void *kernend; 179 uint32_t memsize; 180 181 extern char edata[], end[]; /* XXX */ 182 183 /* clear the BSS segment */ 184 kernend = (void *)mips_round_page(end); 185 186 memset(edata, 0, (char *)kernend - edata); 187 188 /* setup early console */ 189 atheros_set_platformsw(); 190 191 /* set CPU model info for sysctl_hw */ 192 cpu_setmodel("Atheros %s", atheros_get_cpuname()); 193 194 /* 195 * Set up the exception vectors and CPU-specific function 196 * vectors early on. We need the wbflush() vector set up 197 * before comcnattach() is called (or at least before the 198 * first printf() after that is called). 199 * Sets up mips_cpu_flags that may be queried by other 200 * functions called during startup. 201 * Also clears the I+D caches. 202 */ 203 mips_vector_init(NULL, false); 204 205 /* 206 * Calibrate timers. 207 */ 208 cal_timer(); 209 210 /* 211 * Set the VM page size. 212 */ 213 uvm_setpagesize(); 214 215 /* 216 * Look at arguments passed to us and compute boothowto. 217 */ 218 boothowto = RB_AUTOBOOT; 219 #ifdef KADB 220 boothowto |= RB_KDB; 221 #endif 222 223 /* 224 * This would be a good place to parse a boot command line, if 225 * we got one from the bootloader. Right now we have no way to 226 * get one from e.g. vxworks. 227 */ 228 229 /* 230 * Determine the memory size. 231 * 232 * Note: Reserve the first page! That's where the trap 233 * vectors are located. 234 */ 235 memsize = atheros_get_memsize(); 236 237 printf("Memory size: 0x%08x\n", memsize); 238 physmem = btoc(memsize); 239 240 mem_clusters[mem_cluster_cnt].start = PAGE_SIZE; 241 mem_clusters[mem_cluster_cnt].size = 242 memsize - mem_clusters[mem_cluster_cnt].start; 243 mem_cluster_cnt++; 244 245 /* 246 * Load the available pages into the VM system. 247 */ 248 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 249 mem_clusters, mem_cluster_cnt, NULL, 0); 250 251 /* 252 * Initialize message buffer (at end of core). 253 */ 254 mips_init_msgbuf(); 255 256 /* 257 * Initialize the virtual memory system. 258 */ 259 pmap_bootstrap(); 260 261 /* 262 * Allocate uarea page for lwp0 and set it. 263 */ 264 mips_init_lwp0_uarea(); 265 266 /* 267 * Initialize busses. 268 */ 269 atheros_bus_init(); 270 271 /* 272 * Turn off (ignore) the hardware watchdog. If we got this 273 * far, then we shouldn't need it anymore. 274 */ 275 atheros_wdog_reload(0); 276 277 /* 278 * Turn off watchpoint that may have been enabled by the 279 * PROM. VxWorks bootloader seems to leave one set. 280 */ 281 __asm volatile ( 282 "mtc0 $0, $%0\n\t" 283 "nop\n\t" 284 "nop\n\t" :: "n"(MIPS_COP_0_WATCH_LO)); 285 286 /* 287 * Initialize debuggers, and break into them, if appropriate. 288 */ 289 #ifdef DDB 290 if (boothowto & RB_KDB) 291 Debugger(); 292 #endif 293 } 294 295 void 296 consinit(void) 297 { 298 299 /* 300 * Everything related to console initialization is done 301 * in mach_init(). 302 */ 303 atheros_consinit(); 304 } 305 306 void 307 cpu_startup(void) 308 { 309 char pbuf[9]; 310 vaddr_t minaddr, maxaddr; 311 #ifdef DEBUG 312 extern int pmapdebug; /* XXX */ 313 int opmapdebug = pmapdebug; 314 315 pmapdebug = 0; /* Shut up pmap debug during bootstrap */ 316 #endif 317 318 /* 319 * Good {morning,afternoon,evening,night}. 320 */ 321 printf("%s%s", copyright, version); 322 printf("%s\n", cpu_getmodel()); 323 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 324 printf("total memory = %s\n", pbuf); 325 326 minaddr = 0; 327 /* 328 * Allocate a submap for physio 329 */ 330 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 331 VM_PHYS_SIZE, 0, FALSE, NULL); 332 333 /* 334 * No need to allocate an mbuf cluster submap. Mbuf clusters 335 * are allocated via the pool allocator, and we use KSEG to 336 * map those pages. 337 */ 338 339 #ifdef DEBUG 340 pmapdebug = opmapdebug; 341 #endif 342 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 343 printf("avail memory = %s\n", pbuf); 344 } 345 346 void 347 cpu_reboot(int howto, char *bootstr) 348 { 349 static int waittime = -1; 350 351 /* Take a snapshot before clobbering any registers. */ 352 savectx(curpcb); 353 354 /* If "always halt" was specified as a boot flag, obey. */ 355 if (boothowto & RB_HALT) 356 howto |= RB_HALT; 357 358 boothowto = howto; 359 360 /* If system is cold, just halt. */ 361 if (cold) { 362 boothowto |= RB_HALT; 363 goto haltsys; 364 } 365 366 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 367 waittime = 0; 368 369 /* 370 * Synchronize the disks.... 371 */ 372 vfs_shutdown(); 373 374 /* 375 * If we've been adjusting the clock, the todr 376 * will be out of synch; adjust it now. 377 */ 378 resettodr(); 379 } 380 381 /* Disable interrupts. */ 382 splhigh(); 383 384 if (boothowto & RB_DUMP) 385 dumpsys(); 386 387 haltsys: 388 /* Run any shutdown hooks. */ 389 doshutdownhooks(); 390 391 pmf_system_shutdown(boothowto); 392 393 #if 0 394 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN) 395 if (board && board->ab_poweroff) 396 board->ab_poweroff(); 397 #endif 398 399 /* 400 * Firmware may autoboot (depending on settings), and we cannot pass 401 * flags to it (at least I haven't figured out how to yet), so 402 * we "pseudo-halt" now. 403 */ 404 if (boothowto & RB_HALT) { 405 printf("\n"); 406 printf("The operating system has halted.\n"); 407 printf("Please press any key to reboot.\n\n"); 408 cnpollc(1); /* For proper keyboard command handling */ 409 cngetc(); 410 cnpollc(0); 411 } 412 413 printf("reseting board...\n\n"); 414 mips_icache_sync_all(); 415 mips_dcache_wbinv_all(); 416 atheros_reset(); 417 __asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC)); 418 printf("Oops, back from reset\n\nSpinning..."); 419 for (;;) 420 /* spin forever */ ; /* XXX */ 421 /*NOTREACHED*/ 422 } 423
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