machdep.c revision 1.17
1 /* $NetBSD: machdep.c,v 1.17 2014/03/24 20:06:31 christos 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 1.17 2014/03/24 20:06:31 christos 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 <mips/locore.h> 108 #include <mips/psl.h> 109 110 #include <mips/bonito/bonitoreg.h> 111 #include <evbmips/gdium/gdiumvar.h> 112 113 #include "com.h" 114 #if NCOM > 0 115 #include <dev/ic/comreg.h> 116 #include <dev/ic/comvar.h> 117 118 int comcnrate = 38400; /* XXX should be config option */ 119 #endif /* NCOM > 0 */ 120 121 struct gdium_config gdium_configuration = { 122 .gc_bonito = { 123 .bc_adbase = 11, /* magic */ 124 }, 125 }; 126 127 /* For sysctl_hw. */ 128 129 /* Maps for VM objects. */ 130 struct vm_map *phys_map = NULL; 131 132 int netboot; /* Are we netbooting? */ 133 134 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 135 int mem_cluster_cnt; 136 137 void configure(void); 138 void mach_init(int, char **, char **, void *); 139 140 /* 141 * For some reason, PMON doesn't assign a real address to the Ralink's BAR. 142 * So we have to do it. 143 */ 144 static void 145 gdium_pci_attach_hook(device_t parent, device_t self, 146 struct pcibus_attach_args *pba) 147 { 148 const pcitag_t high_dev = pci_make_tag(pba->pba_pc, 0, 17, 1); 149 const pcitag_t ralink_dev = pci_make_tag(pba->pba_pc, 0, 13, 0); 150 bus_size_t high_size, ralink_size; 151 pcireg_t v; 152 153 /* 154 * Get the highest PCI addr used from the last PCI dev. 155 */ 156 v = pci_conf_read(pba->pba_pc, high_dev, PCI_MAPREG_START); 157 v &= PCI_MAPREG_MEM_ADDR_MASK; 158 159 /* 160 * Get the sizes of the map registers. 161 */ 162 pci_mapreg_info(pba->pba_pc, high_dev, PCI_MAPREG_START, 163 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &high_size, NULL); 164 pci_mapreg_info(pba->pba_pc, ralink_dev, PCI_MAPREG_START, 165 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &ralink_size, NULL); 166 167 /* 168 * Position the ralink register space after the last device. 169 */ 170 v = (v + high_size + ralink_size - 1) & ~(ralink_size - 1); 171 172 /* 173 * Set the mapreg. 174 */ 175 pci_conf_write(pba->pba_pc, ralink_dev, PCI_MAPREG_START, v); 176 177 #if 0 178 /* 179 * Why does linux do this? 180 */ 181 for (int dev = 15; dev <= 17; dev +=2) { 182 for (int func = 0; func <= 1; func++) { 183 pcitag_t usb_dev = pci_make_tag(pba->pba_pc, 0, dev, func); 184 v = pci_conf_read(pba->pba_pc, usb_dev, 0xe0); 185 v |= 3; 186 pci_conf_write(pba->pba_pc, usb_dev, 0xe0, v); 187 } 188 } 189 #endif 190 } 191 192 /* 193 * Do all the stuff that locore normally does before calling main(). 194 */ 195 void 196 mach_init(int argc, char **argv, char **envp32, void *callvec) 197 { 198 struct gdium_config *gc = &gdium_configuration; 199 void *kernend; 200 #ifdef NOTYET 201 char *cp; 202 int howto; 203 #endif 204 int i; 205 psize_t memsize; 206 char *envp[128]; 207 int32_t *eptrs = (int32_t *)envp32; 208 extern char edata[], end[]; 209 210 /* 211 * Clear the BSS segment. 212 */ 213 kernend = (void *)mips_round_page(end); 214 memset(edata, 0, (char *)kernend - edata); 215 216 /* 217 * the pointer array in envp32 is 32bit - we need to sign extend them 218 * and put them into a list of actual pointers 219 * Only strictly necessary on LP64 but it doesn't hurt in LP32, runs only 220 * once at startup and I'd rather not pollute this file with another 221 * #ifdef orgy 222 */ 223 i = 0; 224 while ((eptrs[i] != 0) && (i < 128)) { 225 envp[i] = (char *)(intptr_t)eptrs[i]; /* sign extend */ 226 i++; 227 } 228 229 /* 230 * Set up the exception vectors and CPU-specific function 231 * vectors early on. We need the wbflush() vector set up 232 * before comcnattach() is called (or at least before the 233 * first printf() after that is called). 234 * Also clears the I+D caches. 235 */ 236 mips_vector_init(NULL, false); 237 238 /* set the VM page size */ 239 uvm_setpagesize(); 240 241 memsize = 256*1024*1024; 242 physmem = btoc(memsize); 243 244 bonito_pci_init(&gc->gc_pc, &gc->gc_bonito); 245 /* 246 * Override the null bonito_pci_attach_hook with our own to we can 247 * fix the ralink (device 13). 248 */ 249 gc->gc_pc.pc_attach_hook = gdium_pci_attach_hook; 250 gdium_bus_io_init(&gc->gc_iot, gc); 251 gdium_bus_mem_init(&gc->gc_memt, gc); 252 gdium_dma_init(gc); 253 gdium_cnattach(gc); 254 255 /* 256 * Disable the 2nd PCI window since we don't need it. 257 */ 258 mips3_sd((uint64_t *)MIPS_PHYS_TO_KSEG1(BONITO_REGBASE + 0x158), 0xe); 259 pci_conf_write(&gc->gc_pc, pci_make_tag(&gc->gc_pc, 0, 0, 0), 18, 0); 260 261 /* 262 * Get the timer from PMON. 263 */ 264 for (i = 0; envp[i] != NULL; i++) { 265 if (!strncmp(envp[i], "cpuclock=", 9)) { 266 curcpu()->ci_cpu_freq = 267 strtoul(&envp[i][9], NULL, 10); 268 break; 269 } 270 } 271 272 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 273 curcpu()->ci_cpu_freq /= 2; 274 275 /* Compute the number of ticks for hz. */ 276 curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz; 277 278 /* Compute the delay divisor. */ 279 curcpu()->ci_divisor_delay = 280 ((curcpu()->ci_cpu_freq + 500000) / 1000000); 281 282 /* 283 * Get correct cpu frequency if the CPU runs at twice the 284 * external/cp0-count frequency. 285 */ 286 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 287 curcpu()->ci_cpu_freq *= 2; 288 289 #ifdef DEBUG 290 printf("Timer calibration: %lu cycles/sec\n", 291 curcpu()->ci_cpu_freq); 292 #endif 293 294 #if NCOM > 0 295 /* 296 * Delay to allow firmware putchars to complete. 297 * FIFO depth * character time. 298 * character time = (1000000 / (defaultrate / 10)) 299 */ 300 delay(160000000 / comcnrate); 301 if (comcnattach(&gc->gc_iot, MALTA_UART0ADR, comcnrate, 302 COM_FREQ, COM_TYPE_NORMAL, 303 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 304 panic("malta: unable to initialize serial console"); 305 #endif /* NCOM > 0 */ 306 307 mem_clusters[0].start = 0; 308 mem_clusters[0].size = ctob(physmem); 309 mem_cluster_cnt = 1; 310 311 cpu_setmodel("Gdium Liberty 1000"); 312 313 /* 314 * XXX: check argv[0] - do something if "gdb"??? 315 */ 316 317 /* 318 * Look at arguments passed to us and compute boothowto. 319 */ 320 boothowto = RB_AUTOBOOT; 321 #ifdef NOTYET 322 for (i = 1; i < argc; i++) { 323 for (cp = argv[i]; *cp; cp++) { 324 /* Ignore superfluous '-', if there is one */ 325 if (*cp == '-') 326 continue; 327 328 howto = 0; 329 BOOT_FLAG(*cp, howto); 330 if (! howto) 331 printf("bootflag '%c' not recognised\n", *cp); 332 else 333 boothowto |= howto; 334 } 335 } 336 #endif 337 338 /* 339 * Load the rest of the available pages into the VM system. 340 */ 341 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 342 mem_clusters, mem_cluster_cnt, NULL, 0); 343 344 /* 345 * Initialize error message buffer (at end of core). 346 */ 347 mips_init_msgbuf(); 348 349 pmap_bootstrap(); 350 351 /* 352 * Allocate uarea page for lwp0 and set it. 353 */ 354 mips_init_lwp0_uarea(); 355 356 /* 357 * Initialize debuggers, and break into them, if appropriate. 358 */ 359 #if defined(DDB) 360 if (boothowto & RB_KDB) 361 Debugger(); 362 #endif 363 } 364 365 void 366 consinit(void) 367 { 368 369 /* 370 * Everything related to console initialization is done 371 * in mach_init(). 372 */ 373 } 374 375 /* 376 * Allocate memory for variable-sized tables, 377 */ 378 void 379 cpu_startup(void) 380 { 381 /* 382 * Do the common startup items. 383 */ 384 cpu_startup_common(); 385 386 /* 387 * Virtual memory is bootstrapped -- notify the bus spaces 388 * that memory allocation is now safe. 389 */ 390 gdium_configuration.gc_mallocsafe = 1; 391 392 } 393 394 int waittime = -1; 395 396 void 397 cpu_reboot(int howto, char *bootstr) 398 { 399 400 /* Take a snapshot before clobbering any registers. */ 401 savectx(curpcb); 402 403 if (cold) { 404 howto |= RB_HALT; 405 goto haltsys; 406 } 407 408 /* If "always halt" was specified as a boot flag, obey. */ 409 if (boothowto & RB_HALT) 410 howto |= RB_HALT; 411 412 boothowto = howto; 413 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 414 waittime = 0; 415 vfs_shutdown(); 416 417 /* 418 * If we've been adjusting the clock, the todr 419 * will be out of synch; adjust it now. 420 */ 421 resettodr(); 422 } 423 424 splhigh(); 425 426 if (howto & RB_DUMP) 427 dumpsys(); 428 429 haltsys: 430 doshutdownhooks(); 431 432 pmf_system_shutdown(boothowto); 433 434 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 435 /* 436 * Turning on GPIO1 as output will cause a powerdown. 437 */ 438 REGVAL(BONITO_GPIODATA) |= 2; 439 REGVAL(BONITO_GPIOIE) &= ~2; 440 } 441 442 if (howto & RB_HALT) { 443 printf("\n"); 444 printf("The operating system has halted.\n"); 445 printf("Please press any key to reboot.\n\n"); 446 cnpollc(1); /* For proper keyboard command handling */ 447 cngetc(); 448 cnpollc(0); 449 } 450 451 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 452 453 /* 454 * Turning off GPIO2 as output will cause a reset. 455 */ 456 REGVAL(BONITO_GPIODATA) &= ~4; 457 REGVAL(BONITO_GPIOIE) &= ~4; 458 459 __asm__ __volatile__ ( 460 "\t.long 0x3c02bfc0\n" 461 "\t.long 0x00400008\n" 462 ::: "v0"); 463 } 464
Indexes created Tue Sep 30 17:09:57 GMT 2025