1 /* $NetBSD: machdep.c,v 1.42 2012/03/02 16:20:55 matt 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) 1988 University of Utah. 40 * Copyright (c) 1992, 1993 41 * The Regents of the University of California. All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * the Systems Programming Group of the University of Utah Computer 45 * Science Department, The Mach Operating System project at 46 * Carnegie-Mellon University and Ralph Campbell. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 73 * from: Utah Hdr: machdep.c 1.63 91/04/24 74 */ 75 76 #include <sys/cdefs.h> 77 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.42 2012/03/02 16:20:55 matt Exp $"); 78 79 #include "opt_ddb.h" 80 #include "opt_execfmt.h" 81 #include "opt_modular.h" 82 83 #include <sys/param.h> 84 #include <sys/boot_flag.h> 85 #include <sys/buf.h> 86 #include <sys/cpu.h> 87 #include <sys/device.h> 88 #include <sys/kcore.h> 89 #include <sys/kernel.h> 90 #include <sys/ksyms.h> 91 #include <sys/mount.h> 92 #include <sys/reboot.h> 93 #include <sys/systm.h> 94 #include <sys/termios.h> 95 96 #include <uvm/uvm_extern.h> 97 98 #include <dev/cons.h> 99 100 #include "ksyms.h" 101 102 #if NKSYMS || defined(DDB) || defined(MODULAR) 103 #include <mips/db_machdep.h> 104 #include <ddb/db_extern.h> 105 #endif 106 107 #include <machine/yamon.h> 108 109 #include <mips/locore.h> 110 #include <mips/psl.h> 111 112 #include <evbmips/malta/autoconf.h> 113 #include <evbmips/malta/maltareg.h> 114 #include <evbmips/malta/maltavar.h> 115 116 #include "com.h" 117 #if NCOM > 0 118 #include <dev/ic/comreg.h> 119 #include <dev/ic/comvar.h> 120 121 int comcnrate = 38400; /* XXX should be config option */ 122 #endif /* NCOM > 0 */ 123 124 125 #define REGVAL(x) *((volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x)))) 126 127 struct malta_config malta_configuration; 128 129 /* For sysctl_hw. */ 130 extern char cpu_model[]; 131 132 /* Maps for VM objects. */ 133 struct vm_map *phys_map = NULL; 134 135 int netboot; /* Are we netbooting? */ 136 137 yamon_env_var *yamon_envp; 138 139 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 140 int mem_cluster_cnt; 141 142 void configure(void); 143 void mach_init(int, char **, yamon_env_var *, u_long); 144 145 /* 146 * Do all the stuff that locore normally does before calling main(). 147 */ 148 void 149 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 150 { 151 struct malta_config *mcp = &malta_configuration; 152 uint8_t * const brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); 153 bus_space_handle_t sh; 154 void *kernend; 155 int freqok; 156 157 extern char edata[], end[]; 158 159 CTASSERT((intptr_t)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES) < 0); 160 161 *brkres = 0; /* Disable BREAK==reset on console */ 162 163 /* Get the propaganda in early! */ 164 led_display_str("NetBSD"); 165 166 /* 167 * Clear the BSS segment. 168 */ 169 kernend = (void *)mips_round_page(end); 170 memset(edata, 0, (char *)kernend - edata); 171 172 /* save the yamon environment pointer */ 173 yamon_envp = envp; 174 175 /* Use YAMON callbacks for early console I/O */ 176 cn_tab = &yamon_promcd; 177 178 /* 179 * Set up the exception vectors and CPU-specific function 180 * vectors early on. We need the wbflush() vector set up 181 * before comcnattach() is called (or at least before the 182 * first printf() after that is called). 183 * Also clears the I+D caches. 184 */ 185 mips_vector_init(NULL, false); 186 187 /* set the VM page size */ 188 uvm_setpagesize(); 189 190 physmem = btoc(memsize); 191 192 /* 193 * Use YAMON's CPU frequency if available. 194 */ 195 freqok = yamon_setcpufreq(1); 196 197 gt_pci_init(&mcp->mc_pc, &mcp->mc_gt); 198 malta_bus_io_init(&mcp->mc_iot, mcp); 199 malta_bus_mem_init(&mcp->mc_memt, mcp); 200 malta_dma_init(mcp); 201 202 /* 203 * Calibrate the timer if YAMON failed to tell us. 204 */ 205 if (!freqok) { 206 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh); 207 malta_cal_timer(&mcp->mc_iot, sh); 208 bus_space_unmap(&mcp->mc_iot, sh, 2); 209 } 210 211 #if NCOM > 0 212 /* 213 * Delay to allow firmware putchars to complete. 214 * FIFO depth * character time. 215 * character time = (1000000 / (defaultrate / 10)) 216 */ 217 delay(160000000 / comcnrate); 218 if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, 219 COM_FREQ, COM_TYPE_NORMAL, 220 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 221 panic("malta: unable to initialize serial console"); 222 #else 223 panic("malta: not configured to use serial console"); 224 #endif /* NCOM > 0 */ 225 226 mem_clusters[0].start = 0; 227 mem_clusters[0].size = ctob(physmem); 228 mem_cluster_cnt = 1; 229 230 strcpy(cpu_model, "MIPS Malta Evaluation Board"); 231 232 /* 233 * XXX: check argv[0] - do something if "gdb"??? 234 */ 235 236 /* 237 * Look at arguments passed to us and compute boothowto. 238 */ 239 boothowto = RB_AUTOBOOT; 240 #ifndef _LP64 241 for (int i = 1; i < argc; i++) { 242 for (char *cp = argv[i]; *cp; cp++) { 243 int howto; 244 /* Ignore superfluous '-', if there is one */ 245 if (*cp == '-') 246 continue; 247 248 howto = 0; 249 BOOT_FLAG(*cp, howto); 250 if (! howto) 251 printf("bootflag '%c' not recognised\n", *cp); 252 else 253 boothowto |= howto; 254 } 255 } 256 #endif 257 258 /* 259 * Load the rest of the available pages into the VM system. 260 */ 261 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 262 mem_clusters, mem_cluster_cnt, NULL, 0); 263 264 /* 265 * Initialize error message buffer (at end of core). 266 */ 267 mips_init_msgbuf(); 268 269 pmap_bootstrap(); 270 271 /* 272 * Allocate uarea page for lwp0 and set it. 273 */ 274 mips_init_lwp0_uarea(); 275 276 /* 277 * Initialize debuggers, and break into them, if appropriate. 278 */ 279 #if defined(DDB) 280 if (boothowto & RB_KDB) 281 Debugger(); 282 #endif 283 284 #ifdef MULTIPROCESSOR 285 /* 286 * We can never be running on more than one processor but we can dream. 287 */ 288 mips_fixup_exceptions(mips_fixup_zero_relative); 289 #endif 290 } 291 292 void 293 consinit(void) 294 { 295 296 /* 297 * Everything related to console initialization is done 298 * in mach_init(). 299 */ 300 } 301 302 /* 303 * Allocate memory for variable-sized tables, 304 */ 305 void 306 cpu_startup(void) 307 { 308 /* 309 * Do the common startup items. 310 */ 311 cpu_startup_common(); 312 313 /* 314 * Virtual memory is bootstrapped -- notify the bus spaces 315 * that memory allocation is now safe. 316 */ 317 malta_configuration.mc_mallocsafe = 1; 318 } 319 320 int waittime = -1; 321 322 void 323 cpu_reboot(int howto, char *bootstr) 324 { 325 326 /* Take a snapshot before clobbering any registers. */ 327 savectx(curpcb); 328 329 if (cold) { 330 howto |= RB_HALT; 331 goto haltsys; 332 } 333 334 /* If "always halt" was specified as a boot flag, obey. */ 335 if (boothowto & RB_HALT) 336 howto |= RB_HALT; 337 338 boothowto = howto; 339 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 340 waittime = 0; 341 vfs_shutdown(); 342 343 /* 344 * If we've been adjusting the clock, the todr 345 * will be out of synch; adjust it now. 346 */ 347 resettodr(); 348 } 349 350 splhigh(); 351 352 if (howto & RB_DUMP) 353 dumpsys(); 354 355 haltsys: 356 doshutdownhooks(); 357 358 pmf_system_shutdown(boothowto); 359 360 if (howto & RB_HALT) { 361 printf("\n"); 362 printf("The operating system has halted.\n"); 363 printf("Please press any key to reboot.\n\n"); 364 cnpollc(1); /* For proper keyboard command handling */ 365 cngetc(); 366 cnpollc(0); 367 } 368 369 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 370 yamon_exit(boothowto); 371 printf("Oops, back from yamon_exit()\n\nResetting..."); 372 373 REGVAL(MALTA_SOFTRES) = MALTA_GORESET; 374 375 /* 376 * Need a small delay here, otherwise we see the first few characters of 377 * the warning below. 378 */ 379 delay(80000); 380 381 printf("WARNING: reset failed!\nSpinning..."); 382 383 for (;;) 384 /* spin forever */ ; /* XXX */ 385 } 386