machdep.c revision 1.7
1 /* $NetBSD: machdep.c,v 1.7 2009/08/11 04:46:21 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) 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 1.7 2009/08/11 04:46:21 matt Exp $"); 116 117 #include "opt_ddb.h" 118 #include "opt_execfmt.h" 119 #include "opt_modular.h" 120 121 #include <sys/param.h> 122 #include <sys/systm.h> 123 #include <sys/kernel.h> 124 #include <sys/buf.h> 125 #include <sys/reboot.h> 126 #include <sys/user.h> 127 #include <sys/mount.h> 128 #include <sys/kcore.h> 129 #include <sys/boot_flag.h> 130 #include <sys/termios.h> 131 #include <sys/ksyms.h> 132 #include <sys/device.h> 133 134 #include <uvm/uvm_extern.h> 135 136 #include <dev/cons.h> 137 138 #include "ksyms.h" 139 140 #if NKSYMS || defined(DDB) || defined(MODULAR) 141 #include <machine/db_machdep.h> 142 #include <ddb/db_extern.h> 143 #endif 144 145 #include <machine/cpu.h> 146 #include <machine/psl.h> 147 148 #include <mips/bonito/bonitoreg.h> 149 #include <evbmips/gdium/gdiumvar.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 struct gdium_config gdium_configuration = { 160 .gc_bonito = { 161 .bc_adbase = 11, /* magic */ 162 }, 163 }; 164 165 /* For sysctl_hw. */ 166 extern char cpu_model[]; 167 168 /* Our exported CPU info; we can have only one. */ 169 struct cpu_info cpu_info_store; 170 171 /* Maps for VM objects. */ 172 struct vm_map *mb_map = NULL; 173 struct vm_map *phys_map = NULL; 174 175 int netboot; /* Are we netbooting? */ 176 177 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX]; 178 int mem_cluster_cnt; 179 180 void configure(void); 181 void mach_init(int, char **, char **, void *); 182 183 /* 184 * safepri is a safe priority for sleep to set for a spin-wait during 185 * autoconfiguration or after a panic. Used as an argument to splx(). 186 */ 187 int safepri = MIPS1_PSL_LOWIPL; 188 189 extern struct user *proc0paddr; 190 191 /* 192 * For some reason, PMON doesn't assign a real address to the Ralink's BAR. 193 * So we have to do it. 194 */ 195 static void 196 gdium_pci_attach_hook(device_t parent, device_t self, 197 struct pcibus_attach_args *pba) 198 { 199 const pcitag_t high_dev = pci_make_tag(pba->pba_pc, 0, 17, 1); 200 const pcitag_t ralink_dev = pci_make_tag(pba->pba_pc, 0, 13, 0); 201 bus_size_t high_size, ralink_size; 202 pcireg_t v; 203 204 /* 205 * Get the highest PCI addr used from the last PCI dev. 206 */ 207 v = pci_conf_read(pba->pba_pc, high_dev, PCI_MAPREG_START); 208 v &= PCI_MAPREG_MEM_ADDR_MASK; 209 210 /* 211 * Get the sizes of the map registers. 212 */ 213 pci_mapreg_info(pba->pba_pc, high_dev, PCI_MAPREG_START, 214 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &high_size, NULL); 215 pci_mapreg_info(pba->pba_pc, ralink_dev, PCI_MAPREG_START, 216 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &ralink_size, NULL); 217 218 /* 219 * Position the ralink register space after the last device. 220 */ 221 v = (v + high_size + ralink_size - 1) & ~(ralink_size - 1); 222 223 /* 224 * Set the mapreg. 225 */ 226 pci_conf_write(pba->pba_pc, ralink_dev, PCI_MAPREG_START, v); 227 228 #if 0 229 /* 230 * Why does linux do this? 231 */ 232 for (int dev = 15; dev <= 17; dev +=2) { 233 for (int func = 0; func <= 1; func++) { 234 pcitag_t usb_dev = pci_make_tag(pba->pba_pc, 0, dev, func); 235 v = pci_conf_read(pba->pba_pc, usb_dev, 0xe0); 236 v |= 3; 237 pci_conf_write(pba->pba_pc, usb_dev, 0xe0, v); 238 } 239 } 240 #endif 241 } 242 243 /* 244 * Do all the stuff that locore normally does before calling main(). 245 */ 246 void 247 mach_init(int argc, char **argv, char **envp, void *callvec) 248 { 249 struct gdium_config *gc = &gdium_configuration; 250 void *kernend, *v; 251 u_long first, last; 252 #ifdef NOTYET 253 char *cp; 254 int howto; 255 #endif 256 int i; 257 psize_t memsize; 258 259 extern char edata[], end[]; 260 261 /* 262 * Clear the BSS segment. 263 */ 264 kernend = (void *)mips_round_page(end); 265 memset(edata, 0, (char *)kernend - edata); 266 267 /* 268 * Set up the exception vectors and CPU-specific function 269 * vectors early on. We need the wbflush() vector set up 270 * before comcnattach() is called (or at least before the 271 * first printf() after that is called). 272 * Also clears the I+D caches. 273 */ 274 mips_vector_init(); 275 276 /* set the VM page size */ 277 uvm_setpagesize(); 278 279 memsize = 256*1024*1024; 280 physmem = btoc(memsize); 281 282 bonito_pci_init(&gc->gc_pc, &gc->gc_bonito); 283 /* 284 * Override the null bonito_pci_attach_hook with our own to we can 285 * fix the ralink (device 13). 286 */ 287 gc->gc_pc.pc_attach_hook = gdium_pci_attach_hook; 288 gdium_bus_io_init(&gc->gc_iot, gc); 289 gdium_bus_mem_init(&gc->gc_memt, gc); 290 gdium_dma_init(gc); 291 gdium_cnattach(gc); 292 293 /* 294 * Disable the 2nd PCI window since we don't need it. 295 */ 296 REGVAL(BONITO_REGBASE + 0x158) = 0xe; 297 REGVAL(BONITO_REGBASE + 0x15c) = 0; 298 pci_conf_write(&gc->gc_pc, pci_make_tag(&gc->gc_pc, 0, 0, 0), 18, 0); 299 300 /* 301 * Get the timer from PMON. 302 */ 303 for (i = 0; envp[i] != NULL; i++) { 304 if (!strncmp(envp[i], "cpuclock=", 9)) { 305 curcpu()->ci_cpu_freq = 306 strtoul(&envp[i][9], NULL, 10); 307 break; 308 } 309 } 310 311 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 312 curcpu()->ci_cpu_freq /= 2; 313 314 /* Compute the number of ticks for hz. */ 315 curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz; 316 317 /* Compute the delay divisor. */ 318 curcpu()->ci_divisor_delay = 319 ((curcpu()->ci_cpu_freq + 500000) / 1000000); 320 321 /* 322 * Get correct cpu frequency if the CPU runs at twice the 323 * external/cp0-count frequency. 324 */ 325 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 326 curcpu()->ci_cpu_freq *= 2; 327 328 #ifdef DEBUG 329 printf("Timer calibration: %lu cycles/sec\n", 330 curcpu()->ci_cpu_freq); 331 #endif 332 333 #if NCOM > 0 334 /* 335 * Delay to allow firmware putchars to complete. 336 * FIFO depth * character time. 337 * character time = (1000000 / (defaultrate / 10)) 338 */ 339 delay(160000000 / comcnrate); 340 if (comcnattach(&gc->gc_iot, MALTA_UART0ADR, comcnrate, 341 COM_FREQ, COM_TYPE_NORMAL, 342 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 343 panic("malta: unable to initialize serial console"); 344 #endif /* NCOM > 0 */ 345 346 mem_clusters[0].start = 0; 347 mem_clusters[0].size = ctob(physmem); 348 mem_cluster_cnt = 1; 349 350 strcpy(cpu_model, "Gdium Liberty 1000"); 351 352 /* 353 * XXX: check argv[0] - do something if "gdb"??? 354 */ 355 356 /* 357 * Look at arguments passed to us and compute boothowto. 358 */ 359 boothowto = RB_AUTOBOOT; 360 #ifdef NOTYET 361 for (i = 1; i < argc; i++) { 362 for (cp = argv[i]; *cp; cp++) { 363 /* Ignore superfluous '-', if there is one */ 364 if (*cp == '-') 365 continue; 366 367 howto = 0; 368 BOOT_FLAG(*cp, howto); 369 if (! howto) 370 printf("bootflag '%c' not recognised\n", *cp); 371 else 372 boothowto |= howto; 373 } 374 } 375 #endif 376 377 /* 378 * Load the rest of the available pages into the VM system. 379 */ 380 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 381 last = mem_clusters[0].start + mem_clusters[0].size; 382 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 383 VM_FREELIST_DEFAULT); 384 385 /* 386 * Initialize error message buffer (at end of core). 387 */ 388 mips_init_msgbuf(); 389 390 pmap_bootstrap(); 391 392 /* 393 * Allocate space for proc0's USPACE. 394 */ 395 v = (void *)uvm_pageboot_alloc(USPACE); 396 lwp0.l_addr = proc0paddr = (struct user *)v; 397 lwp0.l_md.md_regs = (struct frame *)((char *)v + USPACE) - 1; 398 proc0paddr->u_pcb.pcb_context[11] = 399 MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ 400 401 /* 402 * Initialize debuggers, and break into them, if appropriate. 403 */ 404 #if defined(DDB) 405 if (boothowto & RB_KDB) 406 Debugger(); 407 #endif 408 } 409 410 void 411 consinit(void) 412 { 413 414 /* 415 * Everything related to console initialization is done 416 * in mach_init(). 417 */ 418 } 419 420 /* 421 * Allocate memory for variable-sized tables, 422 */ 423 void 424 cpu_startup(void) 425 { 426 vaddr_t minaddr, maxaddr; 427 char pbuf[9]; 428 429 /* 430 * Good {morning,afternoon,evening,night}. 431 */ 432 printf("%s%s", copyright, version); 433 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 434 printf("total memory = %s\n", pbuf); 435 436 /* 437 * Virtual memory is bootstrapped -- notify the bus spaces 438 * that memory allocation is now safe. 439 */ 440 gdium_configuration.gc_mallocsafe = 1; 441 442 minaddr = 0; 443 /* 444 * Allocate a submap for physio. 445 */ 446 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 447 VM_PHYS_SIZE, 0, FALSE, NULL); 448 449 /* 450 * (No need to allocate an mbuf cluster submap. Mbuf clusters 451 * are allocated via the pool allocator, and we use KSEG to 452 * map those pages.) 453 */ 454 455 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 456 printf("avail memory = %s\n", pbuf); 457 } 458 459 int waittime = -1; 460 461 void 462 cpu_reboot(int howto, char *bootstr) 463 { 464 465 /* Take a snapshot before clobbering any registers. */ 466 if (curproc) 467 savectx((struct user *)curpcb); 468 469 if (cold) { 470 howto |= RB_HALT; 471 goto haltsys; 472 } 473 474 /* If "always halt" was specified as a boot flag, obey. */ 475 if (boothowto & RB_HALT) 476 howto |= RB_HALT; 477 478 boothowto = howto; 479 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 480 waittime = 0; 481 vfs_shutdown(); 482 483 /* 484 * If we've been adjusting the clock, the todr 485 * will be out of synch; adjust it now. 486 */ 487 resettodr(); 488 } 489 490 splhigh(); 491 492 if (howto & RB_DUMP) 493 dumpsys(); 494 495 haltsys: 496 doshutdownhooks(); 497 498 pmf_system_shutdown(boothowto); 499 500 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 501 /* 502 * Turning on GPIO1 as output will cause a powerdown. 503 */ 504 REGVAL(BONITO_GPIODATA) |= 2; 505 REGVAL(BONITO_GPIOIE) &= ~2; 506 } 507 508 if (howto & RB_HALT) { 509 printf("\n"); 510 printf("The operating system has halted.\n"); 511 printf("Please press any key to reboot.\n\n"); 512 cnpollc(1); /* For proper keyboard command handling */ 513 cngetc(); 514 cnpollc(0); 515 } 516 517 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 518 519 /* 520 * Turning off GPIO2 as output will cause a reset. 521 */ 522 REGVAL(BONITO_GPIODATA) &= ~4; 523 REGVAL(BONITO_GPIOIE) &= ~4; 524 525 __asm__ __volatile__ ( 526 "\t.long 0x3c02bfc0\n" 527 "\t.long 0x00400008\n" 528 ::: "v0"); 529 } 530
Indexes created Mon Oct 20 15:10:11 GMT 2025