machdep.c revision 1.27.22.1
1 /* $NetBSD: machdep.c,v 1.27.22.1 2008/09/18 04:33:24 wrstuden Exp $ */ 2 3 /* 4 * Copyright 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1992, 1993 40 * The Regents of the University of California. All rights reserved. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department, The Mach Operating System project at 45 * Carnegie-Mellon University and Ralph Campbell. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 72 * from: Utah Hdr: machdep.c 1.63 91/04/24 73 */ 74 /* 75 * Copyright (c) 1988 University of Utah. 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. All advertising materials mentioning features or use of this software 91 * must display the following acknowledgement: 92 * This product includes software developed by the University of 93 * California, Berkeley and its contributors. 94 * 4. Neither the name of the University nor the names of its contributors 95 * may be used to endorse or promote products derived from this software 96 * without specific prior written permission. 97 * 98 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 99 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 100 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 101 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 102 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 103 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 104 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 105 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 106 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 107 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 108 * SUCH DAMAGE. 109 * 110 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 111 * from: Utah Hdr: machdep.c 1.63 91/04/24 112 */ 113 114 #include <sys/cdefs.h> 115 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.27.22.1 2008/09/18 04:33:24 wrstuden Exp $"); 116 117 #include "opt_ddb.h" 118 #include "opt_execfmt.h" 119 120 #include <sys/param.h> 121 #include <sys/systm.h> 122 #include <sys/kernel.h> 123 #include <sys/buf.h> 124 #include <sys/reboot.h> 125 #include <sys/user.h> 126 #include <sys/mount.h> 127 #include <sys/kcore.h> 128 #include <sys/boot_flag.h> 129 #include <sys/termios.h> 130 #include <sys/ksyms.h> 131 132 #include <uvm/uvm_extern.h> 133 134 #include <dev/cons.h> 135 136 #include "ksyms.h" 137 138 #if NKSYMS || defined(DDB) || defined(LKM) 139 #include <machine/db_machdep.h> 140 #include <ddb/db_extern.h> 141 #endif 142 143 #include <machine/cpu.h> 144 #include <machine/psl.h> 145 #include <machine/yamon.h> 146 147 #include <evbmips/malta/autoconf.h> 148 #include <evbmips/malta/maltareg.h> 149 #include <evbmips/malta/maltavar.h> 150 151 #include "com.h" 152 #if NCOM > 0 153 #include <dev/ic/comreg.h> 154 #include <dev/ic/comvar.h> 155 156 int comcnrate = 38400; /* XXX should be config option */ 157 #endif /* NCOM > 0 */ 158 159 160 #define REGVAL(x) *((volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x)))) 161 162 struct malta_config malta_configuration; 163 164 /* For sysctl_hw. */ 165 extern char cpu_model[]; 166 167 /* Our exported CPU info; we can have only one. */ 168 struct cpu_info cpu_info_store; 169 170 /* Maps for VM objects. */ 171 struct vm_map *mb_map = NULL; 172 struct vm_map *phys_map = NULL; 173 174 int physmem; /* Total physical memory */ 175 176 int netboot; /* Are we netbooting? */ 177 178 yamon_env_var *yamon_envp; 179 180 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 181 int mem_cluster_cnt; 182 183 void configure(void); 184 void mach_init(int, char **, yamon_env_var *, u_long); 185 186 /* 187 * safepri is a safe priority for sleep to set for a spin-wait during 188 * autoconfiguration or after a panic. Used as an argument to splx(). 189 */ 190 int safepri = MIPS1_PSL_LOWIPL; 191 192 extern struct user *proc0paddr; 193 194 /* 195 * Do all the stuff that locore normally does before calling main(). 196 */ 197 void 198 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 199 { 200 struct malta_config *mcp = &malta_configuration; 201 bus_space_handle_t sh; 202 void *kernend, *v; 203 u_long first, last; 204 char *cp; 205 int freqok, i, howto; 206 uint8_t *brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); 207 208 extern char edata[], end[]; 209 210 *brkres = 0; /* Disable BREAK==reset on console */ 211 212 /* Get the propaganda in early! */ 213 led_display_str("NetBSD"); 214 215 /* 216 * Clear the BSS segment. 217 */ 218 kernend = (void *)mips_round_page(end); 219 memset(edata, 0, (char *)kernend - edata); 220 221 /* save the yamon environment pointer */ 222 yamon_envp = envp; 223 224 /* Use YAMON callbacks for early console I/O */ 225 cn_tab = &yamon_promcd; 226 227 /* 228 * Set up the exception vectors and CPU-specific function 229 * vectors early on. We need the wbflush() vector set up 230 * before comcnattach() is called (or at least before the 231 * first printf() after that is called). 232 * Also clears the I+D caches. 233 */ 234 mips_vector_init(); 235 236 /* set the VM page size */ 237 uvm_setpagesize(); 238 239 physmem = btoc(memsize); 240 241 /* 242 * Use YAMON's CPU frequency if available. 243 */ 244 freqok = yamon_setcpufreq(1); 245 246 gt_pci_init(&mcp->mc_pc, &mcp->mc_gt); 247 malta_bus_io_init(&mcp->mc_iot, mcp); 248 malta_bus_mem_init(&mcp->mc_memt, mcp); 249 malta_dma_init(mcp); 250 251 /* 252 * Calibrate the timer if YAMON failed to tell us. 253 */ 254 if (!freqok) { 255 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh); 256 malta_cal_timer(&mcp->mc_iot, sh); 257 bus_space_unmap(&mcp->mc_iot, sh, 2); 258 } 259 260 #if NCOM > 0 261 /* 262 * Delay to allow firmware putchars to complete. 263 * FIFO depth * character time. 264 * character time = (1000000 / (defaultrate / 10)) 265 */ 266 delay(160000000 / comcnrate); 267 if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, 268 COM_FREQ, COM_TYPE_NORMAL, 269 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 270 panic("malta: unable to initialize serial console"); 271 #else 272 panic("malta: not configured to use serial console"); 273 #endif /* NCOM > 0 */ 274 275 mem_clusters[0].start = 0; 276 mem_clusters[0].size = ctob(physmem); 277 mem_cluster_cnt = 1; 278 279 strcpy(cpu_model, "MIPS Malta Evaluation Board"); 280 281 /* 282 * XXX: check argv[0] - do something if "gdb"??? 283 */ 284 285 /* 286 * Look at arguments passed to us and compute boothowto. 287 */ 288 boothowto = RB_AUTOBOOT; 289 for (i = 1; i < argc; i++) { 290 for (cp = argv[i]; *cp; cp++) { 291 /* Ignore superfluous '-', if there is one */ 292 if (*cp == '-') 293 continue; 294 295 howto = 0; 296 BOOT_FLAG(*cp, howto); 297 if (! howto) 298 printf("bootflag '%c' not recognised\n", *cp); 299 else 300 boothowto |= howto; 301 } 302 } 303 304 /* 305 * Load the rest of the available pages into the VM system. 306 */ 307 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 308 last = mem_clusters[0].start + mem_clusters[0].size; 309 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 310 VM_FREELIST_DEFAULT); 311 312 /* 313 * Initialize error message buffer (at end of core). 314 */ 315 mips_init_msgbuf(); 316 317 pmap_bootstrap(); 318 319 /* 320 * Allocate space for proc0's USPACE. 321 */ 322 v = (void *)uvm_pageboot_alloc(USPACE); 323 lwp0.l_addr = proc0paddr = (struct user *)v; 324 lwp0.l_md.md_regs = (struct frame *)((char *)v + USPACE) - 1; 325 proc0paddr->u_pcb.pcb_context[11] = 326 MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ 327 328 /* 329 * Initialize debuggers, and break into them, if appropriate. 330 */ 331 #if NKSYMS || defined(DDB) || defined(LKM) 332 ksyms_init(0, 0, 0); 333 #endif 334 335 #if defined(DDB) 336 if (boothowto & RB_KDB) 337 Debugger(); 338 #endif 339 } 340 341 void 342 consinit(void) 343 { 344 345 /* 346 * Everything related to console initialization is done 347 * in mach_init(). 348 */ 349 } 350 351 /* 352 * Allocate memory for variable-sized tables, 353 */ 354 void 355 cpu_startup() 356 { 357 vaddr_t minaddr, maxaddr; 358 char pbuf[9]; 359 360 /* 361 * Good {morning,afternoon,evening,night}. 362 */ 363 printf("%s%s", copyright, version); 364 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 365 printf("total memory = %s\n", pbuf); 366 367 /* 368 * Virtual memory is bootstrapped -- notify the bus spaces 369 * that memory allocation is now safe. 370 */ 371 malta_configuration.mc_mallocsafe = 1; 372 373 minaddr = 0; 374 /* 375 * Allocate a submap for physio. 376 */ 377 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 378 VM_PHYS_SIZE, 0, FALSE, NULL); 379 380 /* 381 * (No need to allocate an mbuf cluster submap. Mbuf clusters 382 * are allocated via the pool allocator, and we use KSEG to 383 * map those pages.) 384 */ 385 386 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 387 printf("avail memory = %s\n", pbuf); 388 } 389 390 int waittime = -1; 391 392 void 393 cpu_reboot(howto, bootstr) 394 int howto; 395 char *bootstr; 396 { 397 398 /* Take a snapshot before clobbering any registers. */ 399 if (curproc) 400 savectx((struct user *)curpcb); 401 402 if (cold) { 403 howto |= RB_HALT; 404 goto haltsys; 405 } 406 407 /* If "always halt" was specified as a boot flag, obey. */ 408 if (boothowto & RB_HALT) 409 howto |= RB_HALT; 410 411 boothowto = howto; 412 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 413 waittime = 0; 414 vfs_shutdown(); 415 416 /* 417 * If we've been adjusting the clock, the todr 418 * will be out of synch; adjust it now. 419 */ 420 resettodr(); 421 } 422 423 splhigh(); 424 425 if (howto & RB_DUMP) 426 dumpsys(); 427 428 haltsys: 429 doshutdownhooks(); 430 431 if (howto & RB_HALT) { 432 printf("\n"); 433 printf("The operating system has halted.\n"); 434 printf("Please press any key to reboot.\n\n"); 435 cnpollc(1); /* For proper keyboard command handling */ 436 cngetc(); 437 cnpollc(0); 438 } 439 440 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 441 yamon_exit(boothowto); 442 printf("Oops, back from yamon_exit()\n\nResetting..."); 443 444 REGVAL(MALTA_SOFTRES) = MALTA_GORESET; 445 446 /* 447 * Need a small delay here, otherwise we see the first few characters of 448 * the warning below. 449 */ 450 delay(80000); 451 452 printf("WARNING: reset failed!\nSpinning..."); 453 454 for (;;) 455 /* spin forever */ ; /* XXX */ 456 } 457
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