machdep.c revision 1.24
1 /* $NetBSD: machdep.c,v 1.24 2011/02/08 20:20:12 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 1.24 2011/02/08 20:20:12 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/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 /* Our exported CPU info; we can have only one. */ 150 struct cpu_info cpu_info_store; 151 152 /* Maps for VM objects. */ 153 struct vm_map *phys_map = NULL; 154 155 int maxmem; /* max memory per process */ 156 157 int mem_cluster_cnt; 158 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 159 160 void mach_init(void); /* XXX */ 161 162 static void 163 cal_timer(void) 164 { 165 uint32_t cntfreq; 166 167 cntfreq = curcpu()->ci_cpu_freq = ar531x_cpu_freq(); 168 169 /* MIPS 4Kc CP0 counts every other clock */ 170 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 171 cntfreq /= 2; 172 173 curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz; 174 175 /* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */ 176 curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000); 177 } 178 179 void 180 mach_init(void) 181 { 182 void *kernend; 183 u_long first, last; 184 uint32_t memsize; 185 186 extern char edata[], end[]; /* XXX */ 187 188 /* clear the BSS segment */ 189 kernend = (void *)mips_round_page(end); 190 191 memset(edata, 0, (char *)kernend - edata); 192 193 /* setup early console */ 194 ar531x_early_console(); 195 196 /* set CPU model info for sysctl_hw */ 197 snprintf(cpu_model, 64, "%s", ar531x_cpuname()); 198 199 /* 200 * Set up the exception vectors and CPU-specific function 201 * vectors early on. We need the wbflush() vector set up 202 * before comcnattach() is called (or at least before the 203 * first printf() after that is called). 204 * Sets up mips_cpu_flags that may be queried by other 205 * functions called during startup. 206 * Also clears the I+D caches. 207 */ 208 mips_vector_init(); 209 210 /* 211 * Calibrate timers. 212 */ 213 cal_timer(); 214 215 /* 216 * Set the VM page size. 217 */ 218 uvm_setpagesize(); 219 220 /* 221 * Look at arguments passed to us and compute boothowto. 222 */ 223 boothowto = RB_AUTOBOOT; 224 #ifdef KADB 225 boothowto |= RB_KDB; 226 #endif 227 228 /* 229 * This would be a good place to parse a boot command line, if 230 * we got one from the bootloader. Right now we have no way to 231 * get one from e.g. vxworks. 232 */ 233 234 /* 235 * Determine the memory size. 236 * 237 * Note: Reserve the first page! That's where the trap 238 * vectors are located. 239 */ 240 memsize = ar531x_memsize(); 241 242 printf("Memory size: 0x%08x\n", memsize); 243 physmem = btoc(memsize); 244 245 mem_clusters[mem_cluster_cnt].start = PAGE_SIZE; 246 mem_clusters[mem_cluster_cnt].size = 247 memsize - mem_clusters[mem_cluster_cnt].start; 248 mem_cluster_cnt++; 249 250 /* 251 * Load the rest of the available pages into the VM system. 252 */ 253 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 254 last = mem_clusters[0].start + mem_clusters[0].size; 255 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 256 VM_FREELIST_DEFAULT); 257 258 /* 259 * Initialize message buffer (at end of core). 260 */ 261 mips_init_msgbuf(); 262 263 /* 264 * Initialize the virtual memory system. 265 */ 266 pmap_bootstrap(); 267 268 /* 269 * Allocate uarea page for lwp0 and set it. 270 */ 271 mips_init_lwp0_uarea(); 272 273 /* 274 * Initialize busses. 275 */ 276 ar531x_businit(); 277 278 /* 279 * Turn off (ignore) the hardware watchdog. If we got this 280 * far, then we shouldn't need it anymore. 281 */ 282 ar531x_wdog(0); 283 284 /* 285 * Turn off watchpoint that may have been enabled by the 286 * PROM. VxWorks bootloader seems to leave one set. 287 */ 288 __asm volatile ( 289 "mtc0 $0, $" ___STRING(MIPS_COP_0_WATCH_LO) " \n\t" 290 "nop\n\t" 291 "nop\n\t"); 292 293 /* 294 * Initialize debuggers, and break into them, if appropriate. 295 */ 296 #ifdef DDB 297 if (boothowto & RB_KDB) 298 Debugger(); 299 #endif 300 } 301 302 void 303 consinit(void) 304 { 305 306 /* 307 * Everything related to console initialization is done 308 * in mach_init(). 309 */ 310 ar531x_consinit(); 311 } 312 313 void 314 cpu_startup(void) 315 { 316 char pbuf[9]; 317 vaddr_t minaddr, maxaddr; 318 #ifdef DEBUG 319 extern int pmapdebug; /* XXX */ 320 int opmapdebug = pmapdebug; 321 322 pmapdebug = 0; /* Shut up pmap debug during bootstrap */ 323 #endif 324 325 /* 326 * Good {morning,afternoon,evening,night}. 327 */ 328 printf("%s%s", copyright, version); 329 printf("%s\n", cpu_model); 330 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 331 printf("total memory = %s\n", pbuf); 332 333 minaddr = 0; 334 /* 335 * Allocate a submap for physio 336 */ 337 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 338 VM_PHYS_SIZE, 0, FALSE, NULL); 339 340 /* 341 * No need to allocate an mbuf cluster submap. Mbuf clusters 342 * are allocated via the pool allocator, and we use KSEG to 343 * map those pages. 344 */ 345 346 #ifdef DEBUG 347 pmapdebug = opmapdebug; 348 #endif 349 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 350 printf("avail memory = %s\n", pbuf); 351 } 352 353 void 354 cpu_reboot(int howto, char *bootstr) 355 { 356 static int waittime = -1; 357 358 /* Take a snapshot before clobbering any registers. */ 359 if (curproc) 360 savectx(curpcb); 361 362 /* If "always halt" was specified as a boot flag, obey. */ 363 if (boothowto & RB_HALT) 364 howto |= RB_HALT; 365 366 boothowto = howto; 367 368 /* If system is cold, just halt. */ 369 if (cold) { 370 boothowto |= RB_HALT; 371 goto haltsys; 372 } 373 374 if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) { 375 waittime = 0; 376 377 /* 378 * Synchronize the disks.... 379 */ 380 vfs_shutdown(); 381 382 /* 383 * If we've been adjusting the clock, the todr 384 * will be out of synch; adjust it now. 385 */ 386 resettodr(); 387 } 388 389 /* Disable interrupts. */ 390 splhigh(); 391 392 if (boothowto & RB_DUMP) 393 dumpsys(); 394 395 haltsys: 396 /* Run any shutdown hooks. */ 397 doshutdownhooks(); 398 399 pmf_system_shutdown(boothowto); 400 401 #if 0 402 if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN) 403 if (board && board->ab_poweroff) 404 board->ab_poweroff(); 405 #endif 406 407 /* 408 * Firmware may autoboot (depending on settings), and we cannot pass 409 * flags to it (at least I haven't figured out how to yet), so 410 * we "pseudo-halt" now. 411 */ 412 if (boothowto & RB_HALT) { 413 printf("\n"); 414 printf("The operating system has halted.\n"); 415 printf("Please press any key to reboot.\n\n"); 416 cnpollc(1); /* For proper keyboard command handling */ 417 cngetc(); 418 cnpollc(0); 419 } 420 421 printf("reseting board...\n\n"); 422 mips_icache_sync_all(); 423 mips_dcache_wbinv_all(); 424 __asm volatile("jr %0" :: "r"(MIPS_RESET_EXC_VEC)); 425 printf("Oops, back from reset\n\nSpinning..."); 426 for (;;) 427 /* spin forever */ ; /* XXX */ 428 /*NOTREACHED*/ 429 } 430
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