1 /* $NetBSD: machdep.c,v 1.47 2024/03/05 14:15:30 thorpej 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 1.47 2024/03/05 14:15:30 thorpej 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 /* Maps for VM objects. */ 130 struct vm_map *phys_map = NULL; 131 132 int netboot; /* Are we netbooting? */ 133 134 yamon_env_var *yamon_envp; 135 136 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 137 int mem_cluster_cnt; 138 139 void configure(void); 140 void mach_init(int, char **, yamon_env_var *, u_long); 141 142 /* 143 * Do all the stuff that locore normally does before calling main(). 144 */ 145 void 146 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize) 147 { 148 struct malta_config *mcp = &malta_configuration; 149 uint8_t * const brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES); 150 bus_space_handle_t sh; 151 void *kernend; 152 int freqok; 153 154 extern char edata[], end[]; 155 156 CTASSERT((intptr_t)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES) < 0); 157 158 *brkres = 0; /* Disable BREAK==reset on console */ 159 160 /* Get the propaganda in early! */ 161 led_display_str("NetBSD"); 162 163 /* 164 * Clear the BSS segment. 165 */ 166 kernend = (void *)mips_round_page(end); 167 memset(edata, 0, (char *)kernend - edata); 168 169 /* save the yamon environment pointer */ 170 yamon_envp = envp; 171 172 /* Use YAMON callbacks for early console I/O */ 173 cn_tab = &yamon_promcd; 174 175 /* 176 * Set up the exception vectors and CPU-specific function 177 * vectors early on. We need the wbflush() vector set up 178 * before comcnattach() is called (or at least before the 179 * first printf() after that is called). 180 * Also clears the I+D caches. 181 */ 182 mips_vector_init(NULL, false); 183 184 uvm_md_init(); 185 186 physmem = btoc(memsize); 187 188 /* 189 * Use YAMON's CPU frequency if available. 190 */ 191 freqok = yamon_setcpufreq(1); 192 193 gt_pci_init(&mcp->mc_pc, &mcp->mc_gt); 194 malta_bus_io_init(&mcp->mc_iot, mcp); 195 malta_bus_mem_init(&mcp->mc_memt, mcp); 196 malta_dma_init(mcp); 197 198 /* 199 * Calibrate the timer if YAMON failed to tell us. 200 */ 201 if (!freqok) { 202 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh); 203 malta_cal_timer(&mcp->mc_iot, sh); 204 bus_space_unmap(&mcp->mc_iot, sh, 2); 205 } 206 207 #if NCOM > 0 208 /* 209 * Delay to allow firmware putchars to complete. 210 * FIFO depth * character time. 211 * character time = (1000000 / (defaultrate / 10)) 212 */ 213 delay(160000000 / comcnrate); 214 if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate, 215 COM_FREQ, COM_TYPE_NORMAL, 216 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 217 panic("malta: unable to initialize serial console"); 218 #else 219 panic("malta: not configured to use serial console"); 220 #endif /* NCOM > 0 */ 221 222 mem_clusters[0].start = 0; 223 mem_clusters[0].size = ctob(physmem); 224 mem_cluster_cnt = 1; 225 226 cpu_setmodel("MIPS Malta Evaluation Board"); 227 228 /* 229 * XXX: check argv[0] - do something if "gdb"??? 230 */ 231 232 /* 233 * Look at arguments passed to us and compute boothowto. 234 */ 235 boothowto = RB_AUTOBOOT; 236 #ifndef _LP64 237 for (int i = 1; i < argc; i++) { 238 for (char *cp = argv[i]; *cp; cp++) { 239 int howto; 240 /* Ignore superfluous '-', if there is one */ 241 if (*cp == '-') 242 continue; 243 244 howto = 0; 245 BOOT_FLAG(*cp, howto); 246 if (! howto) 247 printf("bootflag '%c' not recognised\n", *cp); 248 else 249 boothowto |= howto; 250 } 251 } 252 #endif 253 254 /* 255 * Load the rest of the available pages into the VM system. 256 */ 257 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 258 mem_clusters, mem_cluster_cnt, NULL, 0); 259 260 /* 261 * Initialize error message buffer (at end of core). 262 */ 263 mips_init_msgbuf(); 264 265 pmap_bootstrap(); 266 267 /* 268 * Allocate uarea page for lwp0 and set it. 269 */ 270 mips_init_lwp0_uarea(); 271 272 /* 273 * Initialize debuggers, and break into them, if appropriate. 274 */ 275 #if defined(DDB) 276 if (boothowto & RB_KDB) 277 Debugger(); 278 #endif 279 280 #if defined(MULTIPROCESSOR) && 0 281 /* 282 * We can never be running on more than one processor but we can dream. 283 */ 284 mips_fixup_exceptions(mips_fixup_zero_relative, NULL); 285 #endif 286 } 287 288 void 289 consinit(void) 290 { 291 292 /* 293 * Everything related to console initialization is done 294 * in mach_init(). 295 */ 296 } 297 298 /* 299 * Allocate memory for variable-sized tables, 300 */ 301 void 302 cpu_startup(void) 303 { 304 /* 305 * Do the common startup items. 306 */ 307 cpu_startup_common(); 308 309 /* 310 * Virtual memory is bootstrapped -- notify the bus spaces 311 * that memory allocation is now safe. 312 */ 313 malta_configuration.mc_mallocsafe = 1; 314 } 315 316 int waittime = -1; 317 318 void 319 cpu_reboot(int howto, char *bootstr) 320 { 321 322 /* Take a snapshot before clobbering any registers. */ 323 savectx(curpcb); 324 325 if (cold) { 326 howto |= RB_HALT; 327 goto haltsys; 328 } 329 330 /* If "always halt" was specified as a boot flag, obey. */ 331 if (boothowto & RB_HALT) 332 howto |= RB_HALT; 333 334 boothowto = howto; 335 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 336 waittime = 0; 337 vfs_shutdown(); 338 } 339 340 splhigh(); 341 342 if (howto & RB_DUMP) 343 dumpsys(); 344 345 haltsys: 346 doshutdownhooks(); 347 348 pmf_system_shutdown(boothowto); 349 350 if (howto & RB_HALT) { 351 printf("\n"); 352 printf("The operating system has halted.\n"); 353 printf("Please press any key to reboot.\n\n"); 354 cnpollc(1); /* For proper keyboard command handling */ 355 cngetc(); 356 cnpollc(0); 357 } 358 359 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 360 yamon_exit(boothowto); 361 printf("Oops, back from yamon_exit()\n\nResetting..."); 362 363 REGVAL(MALTA_SOFTRES) = MALTA_GORESET; 364 365 /* 366 * Need a small delay here, otherwise we see the first few characters of 367 * the warning below. 368 */ 369 delay(80000); 370 371 printf("WARNING: reset failed!\nSpinning..."); 372 373 for (;;) 374 /* spin forever */ ; /* XXX */ 375 } 376
Indexes created Tue Sep 30 06:09:59 GMT 2025