machdep.c revision 1.16
1 /* $NetBSD: machdep.c,v 1.16 2011/08/24 19:03:02 macallan 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 1.16 2011/08/24 19:03:02 macallan 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 extern char cpu_model[]; 129 130 /* Maps for VM objects. */ 131 struct vm_map *phys_map = NULL; 132 133 int netboot; /* Are we netbooting? */ 134 135 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 136 int mem_cluster_cnt; 137 138 void configure(void); 139 void mach_init(int, char **, char **, void *); 140 141 /* 142 * For some reason, PMON doesn't assign a real address to the Ralink's BAR. 143 * So we have to do it. 144 */ 145 static void 146 gdium_pci_attach_hook(device_t parent, device_t self, 147 struct pcibus_attach_args *pba) 148 { 149 const pcitag_t high_dev = pci_make_tag(pba->pba_pc, 0, 17, 1); 150 const pcitag_t ralink_dev = pci_make_tag(pba->pba_pc, 0, 13, 0); 151 bus_size_t high_size, ralink_size; 152 pcireg_t v; 153 154 /* 155 * Get the highest PCI addr used from the last PCI dev. 156 */ 157 v = pci_conf_read(pba->pba_pc, high_dev, PCI_MAPREG_START); 158 v &= PCI_MAPREG_MEM_ADDR_MASK; 159 160 /* 161 * Get the sizes of the map registers. 162 */ 163 pci_mapreg_info(pba->pba_pc, high_dev, PCI_MAPREG_START, 164 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &high_size, NULL); 165 pci_mapreg_info(pba->pba_pc, ralink_dev, PCI_MAPREG_START, 166 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &ralink_size, NULL); 167 168 /* 169 * Position the ralink register space after the last device. 170 */ 171 v = (v + high_size + ralink_size - 1) & ~(ralink_size - 1); 172 173 /* 174 * Set the mapreg. 175 */ 176 pci_conf_write(pba->pba_pc, ralink_dev, PCI_MAPREG_START, v); 177 178 #if 0 179 /* 180 * Why does linux do this? 181 */ 182 for (int dev = 15; dev <= 17; dev +=2) { 183 for (int func = 0; func <= 1; func++) { 184 pcitag_t usb_dev = pci_make_tag(pba->pba_pc, 0, dev, func); 185 v = pci_conf_read(pba->pba_pc, usb_dev, 0xe0); 186 v |= 3; 187 pci_conf_write(pba->pba_pc, usb_dev, 0xe0, v); 188 } 189 } 190 #endif 191 } 192 193 /* 194 * Do all the stuff that locore normally does before calling main(). 195 */ 196 void 197 mach_init(int argc, char **argv, char **envp32, void *callvec) 198 { 199 struct gdium_config *gc = &gdium_configuration; 200 void *kernend; 201 #ifdef NOTYET 202 char *cp; 203 int howto; 204 #endif 205 int i; 206 psize_t memsize; 207 char *envp[128]; 208 int32_t *eptrs = (int32_t *)envp32; 209 extern char edata[], end[]; 210 211 /* 212 * Clear the BSS segment. 213 */ 214 kernend = (void *)mips_round_page(end); 215 memset(edata, 0, (char *)kernend - edata); 216 217 /* 218 * the pointer array in envp32 is 32bit - we need to sign extend them 219 * and put them into a list of actual pointers 220 * Only strictly necessary on LP64 but it doesn't hurt in LP32, runs only 221 * once at startup and I'd rather not pollute this file with another 222 * #ifdef orgy 223 */ 224 i = 0; 225 while ((eptrs[i] != 0) && (i < 128)) { 226 envp[i] = (char *)(intptr_t)eptrs[i]; /* sign extend */ 227 i++; 228 } 229 230 /* 231 * Set up the exception vectors and CPU-specific function 232 * vectors early on. We need the wbflush() vector set up 233 * before comcnattach() is called (or at least before the 234 * first printf() after that is called). 235 * Also clears the I+D caches. 236 */ 237 mips_vector_init(NULL, false); 238 239 /* set the VM page size */ 240 uvm_setpagesize(); 241 242 memsize = 256*1024*1024; 243 physmem = btoc(memsize); 244 245 bonito_pci_init(&gc->gc_pc, &gc->gc_bonito); 246 /* 247 * Override the null bonito_pci_attach_hook with our own to we can 248 * fix the ralink (device 13). 249 */ 250 gc->gc_pc.pc_attach_hook = gdium_pci_attach_hook; 251 gdium_bus_io_init(&gc->gc_iot, gc); 252 gdium_bus_mem_init(&gc->gc_memt, gc); 253 gdium_dma_init(gc); 254 gdium_cnattach(gc); 255 256 /* 257 * Disable the 2nd PCI window since we don't need it. 258 */ 259 mips3_sd((uint64_t *)MIPS_PHYS_TO_KSEG1(BONITO_REGBASE + 0x158), 0xe); 260 pci_conf_write(&gc->gc_pc, pci_make_tag(&gc->gc_pc, 0, 0, 0), 18, 0); 261 262 /* 263 * Get the timer from PMON. 264 */ 265 for (i = 0; envp[i] != NULL; i++) { 266 if (!strncmp(envp[i], "cpuclock=", 9)) { 267 curcpu()->ci_cpu_freq = 268 strtoul(&envp[i][9], NULL, 10); 269 break; 270 } 271 } 272 273 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 274 curcpu()->ci_cpu_freq /= 2; 275 276 /* Compute the number of ticks for hz. */ 277 curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz; 278 279 /* Compute the delay divisor. */ 280 curcpu()->ci_divisor_delay = 281 ((curcpu()->ci_cpu_freq + 500000) / 1000000); 282 283 /* 284 * Get correct cpu frequency if the CPU runs at twice the 285 * external/cp0-count frequency. 286 */ 287 if (mips_options.mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 288 curcpu()->ci_cpu_freq *= 2; 289 290 #ifdef DEBUG 291 printf("Timer calibration: %lu cycles/sec\n", 292 curcpu()->ci_cpu_freq); 293 #endif 294 295 #if NCOM > 0 296 /* 297 * Delay to allow firmware putchars to complete. 298 * FIFO depth * character time. 299 * character time = (1000000 / (defaultrate / 10)) 300 */ 301 delay(160000000 / comcnrate); 302 if (comcnattach(&gc->gc_iot, MALTA_UART0ADR, comcnrate, 303 COM_FREQ, COM_TYPE_NORMAL, 304 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 305 panic("malta: unable to initialize serial console"); 306 #endif /* NCOM > 0 */ 307 308 mem_clusters[0].start = 0; 309 mem_clusters[0].size = ctob(physmem); 310 mem_cluster_cnt = 1; 311 312 strcpy(cpu_model, "Gdium Liberty 1000"); 313 314 /* 315 * XXX: check argv[0] - do something if "gdb"??? 316 */ 317 318 /* 319 * Look at arguments passed to us and compute boothowto. 320 */ 321 boothowto = RB_AUTOBOOT; 322 #ifdef NOTYET 323 for (i = 1; i < argc; i++) { 324 for (cp = argv[i]; *cp; cp++) { 325 /* Ignore superfluous '-', if there is one */ 326 if (*cp == '-') 327 continue; 328 329 howto = 0; 330 BOOT_FLAG(*cp, howto); 331 if (! howto) 332 printf("bootflag '%c' not recognised\n", *cp); 333 else 334 boothowto |= howto; 335 } 336 } 337 #endif 338 339 /* 340 * Load the rest of the available pages into the VM system. 341 */ 342 mips_page_physload(MIPS_KSEG0_START, (vaddr_t)kernend, 343 mem_clusters, mem_cluster_cnt, NULL, 0); 344 345 /* 346 * Initialize error message buffer (at end of core). 347 */ 348 mips_init_msgbuf(); 349 350 pmap_bootstrap(); 351 352 /* 353 * Allocate uarea page for lwp0 and set it. 354 */ 355 mips_init_lwp0_uarea(); 356 357 /* 358 * Initialize debuggers, and break into them, if appropriate. 359 */ 360 #if defined(DDB) 361 if (boothowto & RB_KDB) 362 Debugger(); 363 #endif 364 } 365 366 void 367 consinit(void) 368 { 369 370 /* 371 * Everything related to console initialization is done 372 * in mach_init(). 373 */ 374 } 375 376 /* 377 * Allocate memory for variable-sized tables, 378 */ 379 void 380 cpu_startup(void) 381 { 382 /* 383 * Do the common startup items. 384 */ 385 cpu_startup_common(); 386 387 /* 388 * Virtual memory is bootstrapped -- notify the bus spaces 389 * that memory allocation is now safe. 390 */ 391 gdium_configuration.gc_mallocsafe = 1; 392 393 } 394 395 int waittime = -1; 396 397 void 398 cpu_reboot(int howto, char *bootstr) 399 { 400 401 /* Take a snapshot before clobbering any registers. */ 402 savectx(curpcb); 403 404 if (cold) { 405 howto |= RB_HALT; 406 goto haltsys; 407 } 408 409 /* If "always halt" was specified as a boot flag, obey. */ 410 if (boothowto & RB_HALT) 411 howto |= RB_HALT; 412 413 boothowto = howto; 414 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 415 waittime = 0; 416 vfs_shutdown(); 417 418 /* 419 * If we've been adjusting the clock, the todr 420 * will be out of synch; adjust it now. 421 */ 422 resettodr(); 423 } 424 425 splhigh(); 426 427 if (howto & RB_DUMP) 428 dumpsys(); 429 430 haltsys: 431 doshutdownhooks(); 432 433 pmf_system_shutdown(boothowto); 434 435 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 436 /* 437 * Turning on GPIO1 as output will cause a powerdown. 438 */ 439 REGVAL(BONITO_GPIODATA) |= 2; 440 REGVAL(BONITO_GPIOIE) &= ~2; 441 } 442 443 if (howto & RB_HALT) { 444 printf("\n"); 445 printf("The operating system has halted.\n"); 446 printf("Please press any key to reboot.\n\n"); 447 cnpollc(1); /* For proper keyboard command handling */ 448 cngetc(); 449 cnpollc(0); 450 } 451 452 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 453 454 /* 455 * Turning off GPIO2 as output will cause a reset. 456 */ 457 REGVAL(BONITO_GPIODATA) &= ~4; 458 REGVAL(BONITO_GPIOIE) &= ~4; 459 460 __asm__ __volatile__ ( 461 "\t.long 0x3c02bfc0\n" 462 "\t.long 0x00400008\n" 463 ::: "v0"); 464 } 465
Indexes created Tue Sep 30 17:09:57 GMT 2025