machdep.c revision 1.9
1 /* $NetBSD: machdep.c,v 1.9 2009/11/26 00:19:16 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 1.9 2009/11/26 00:19:16 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 /* 190 * For some reason, PMON doesn't assign a real address to the Ralink's BAR. 191 * So we have to do it. 192 */ 193 static void 194 gdium_pci_attach_hook(device_t parent, device_t self, 195 struct pcibus_attach_args *pba) 196 { 197 const pcitag_t high_dev = pci_make_tag(pba->pba_pc, 0, 17, 1); 198 const pcitag_t ralink_dev = pci_make_tag(pba->pba_pc, 0, 13, 0); 199 bus_size_t high_size, ralink_size; 200 pcireg_t v; 201 202 /* 203 * Get the highest PCI addr used from the last PCI dev. 204 */ 205 v = pci_conf_read(pba->pba_pc, high_dev, PCI_MAPREG_START); 206 v &= PCI_MAPREG_MEM_ADDR_MASK; 207 208 /* 209 * Get the sizes of the map registers. 210 */ 211 pci_mapreg_info(pba->pba_pc, high_dev, PCI_MAPREG_START, 212 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &high_size, NULL); 213 pci_mapreg_info(pba->pba_pc, ralink_dev, PCI_MAPREG_START, 214 PCI_MAPREG_MEM_TYPE_32BIT, NULL, &ralink_size, NULL); 215 216 /* 217 * Position the ralink register space after the last device. 218 */ 219 v = (v + high_size + ralink_size - 1) & ~(ralink_size - 1); 220 221 /* 222 * Set the mapreg. 223 */ 224 pci_conf_write(pba->pba_pc, ralink_dev, PCI_MAPREG_START, v); 225 226 #if 0 227 /* 228 * Why does linux do this? 229 */ 230 for (int dev = 15; dev <= 17; dev +=2) { 231 for (int func = 0; func <= 1; func++) { 232 pcitag_t usb_dev = pci_make_tag(pba->pba_pc, 0, dev, func); 233 v = pci_conf_read(pba->pba_pc, usb_dev, 0xe0); 234 v |= 3; 235 pci_conf_write(pba->pba_pc, usb_dev, 0xe0, v); 236 } 237 } 238 #endif 239 } 240 241 /* 242 * Do all the stuff that locore normally does before calling main(). 243 */ 244 void 245 mach_init(int argc, char **argv, char **envp, void *callvec) 246 { 247 struct gdium_config *gc = &gdium_configuration; 248 void *kernend, *v; 249 u_long first, last; 250 #ifdef NOTYET 251 char *cp; 252 int howto; 253 #endif 254 int i; 255 psize_t memsize; 256 257 extern char edata[], end[]; 258 259 /* 260 * Clear the BSS segment. 261 */ 262 kernend = (void *)mips_round_page(end); 263 memset(edata, 0, (char *)kernend - edata); 264 265 /* 266 * Set up the exception vectors and CPU-specific function 267 * vectors early on. We need the wbflush() vector set up 268 * before comcnattach() is called (or at least before the 269 * first printf() after that is called). 270 * Also clears the I+D caches. 271 */ 272 mips_vector_init(); 273 274 /* set the VM page size */ 275 uvm_setpagesize(); 276 277 memsize = 256*1024*1024; 278 physmem = btoc(memsize); 279 280 bonito_pci_init(&gc->gc_pc, &gc->gc_bonito); 281 /* 282 * Override the null bonito_pci_attach_hook with our own to we can 283 * fix the ralink (device 13). 284 */ 285 gc->gc_pc.pc_attach_hook = gdium_pci_attach_hook; 286 gdium_bus_io_init(&gc->gc_iot, gc); 287 gdium_bus_mem_init(&gc->gc_memt, gc); 288 gdium_dma_init(gc); 289 gdium_cnattach(gc); 290 291 /* 292 * Disable the 2nd PCI window since we don't need it. 293 */ 294 mips3_sd((uint64_t *)MIPS_PHYS_TO_KSEG1(BONITO_REGBASE + 0x158), 0xe); 295 pci_conf_write(&gc->gc_pc, pci_make_tag(&gc->gc_pc, 0, 0, 0), 18, 0); 296 297 /* 298 * Get the timer from PMON. 299 */ 300 for (i = 0; envp[i] != NULL; i++) { 301 if (!strncmp(envp[i], "cpuclock=", 9)) { 302 curcpu()->ci_cpu_freq = 303 strtoul(&envp[i][9], NULL, 10); 304 break; 305 } 306 } 307 308 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 309 curcpu()->ci_cpu_freq /= 2; 310 311 /* Compute the number of ticks for hz. */ 312 curcpu()->ci_cycles_per_hz = (curcpu()->ci_cpu_freq + hz / 2) / hz; 313 314 /* Compute the delay divisor. */ 315 curcpu()->ci_divisor_delay = 316 ((curcpu()->ci_cpu_freq + 500000) / 1000000); 317 318 /* 319 * Get correct cpu frequency if the CPU runs at twice the 320 * external/cp0-count frequency. 321 */ 322 if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT) 323 curcpu()->ci_cpu_freq *= 2; 324 325 #ifdef DEBUG 326 printf("Timer calibration: %lu cycles/sec\n", 327 curcpu()->ci_cpu_freq); 328 #endif 329 330 #if NCOM > 0 331 /* 332 * Delay to allow firmware putchars to complete. 333 * FIFO depth * character time. 334 * character time = (1000000 / (defaultrate / 10)) 335 */ 336 delay(160000000 / comcnrate); 337 if (comcnattach(&gc->gc_iot, MALTA_UART0ADR, comcnrate, 338 COM_FREQ, COM_TYPE_NORMAL, 339 (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) 340 panic("malta: unable to initialize serial console"); 341 #endif /* NCOM > 0 */ 342 343 mem_clusters[0].start = 0; 344 mem_clusters[0].size = ctob(physmem); 345 mem_cluster_cnt = 1; 346 347 strcpy(cpu_model, "Gdium Liberty 1000"); 348 349 /* 350 * XXX: check argv[0] - do something if "gdb"??? 351 */ 352 353 /* 354 * Look at arguments passed to us and compute boothowto. 355 */ 356 boothowto = RB_AUTOBOOT; 357 #ifdef NOTYET 358 for (i = 1; i < argc; i++) { 359 for (cp = argv[i]; *cp; cp++) { 360 /* Ignore superfluous '-', if there is one */ 361 if (*cp == '-') 362 continue; 363 364 howto = 0; 365 BOOT_FLAG(*cp, howto); 366 if (! howto) 367 printf("bootflag '%c' not recognised\n", *cp); 368 else 369 boothowto |= howto; 370 } 371 } 372 #endif 373 374 /* 375 * Load the rest of the available pages into the VM system. 376 */ 377 first = round_page(MIPS_KSEG0_TO_PHYS(kernend)); 378 last = mem_clusters[0].start + mem_clusters[0].size; 379 uvm_page_physload(atop(first), atop(last), atop(first), atop(last), 380 VM_FREELIST_DEFAULT); 381 382 /* 383 * Initialize error message buffer (at end of core). 384 */ 385 mips_init_msgbuf(); 386 387 pmap_bootstrap(); 388 389 /* 390 * Allocate space for proc0's USPACE. 391 */ 392 v = (void *)uvm_pageboot_alloc(USPACE); 393 lwp0.l_addr = (struct user *)v; 394 lwp0.l_md.md_regs = (struct frame *)((char *)v + USPACE) - 1; 395 lwp0.l_addr->u_pcb.pcb_context[11] = 396 MIPS_INT_MASK | MIPS_SR_INT_IE; /* SR */ 397 398 /* 399 * Initialize debuggers, and break into them, if appropriate. 400 */ 401 #if defined(DDB) 402 if (boothowto & RB_KDB) 403 Debugger(); 404 #endif 405 } 406 407 void 408 consinit(void) 409 { 410 411 /* 412 * Everything related to console initialization is done 413 * in mach_init(). 414 */ 415 } 416 417 /* 418 * Allocate memory for variable-sized tables, 419 */ 420 void 421 cpu_startup(void) 422 { 423 vaddr_t minaddr, maxaddr; 424 char pbuf[9]; 425 426 /* 427 * Good {morning,afternoon,evening,night}. 428 */ 429 printf("%s%s", copyright, version); 430 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 431 printf("total memory = %s\n", pbuf); 432 433 /* 434 * Virtual memory is bootstrapped -- notify the bus spaces 435 * that memory allocation is now safe. 436 */ 437 gdium_configuration.gc_mallocsafe = 1; 438 439 minaddr = 0; 440 /* 441 * Allocate a submap for physio. 442 */ 443 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 444 VM_PHYS_SIZE, 0, FALSE, NULL); 445 446 /* 447 * (No need to allocate an mbuf cluster submap. Mbuf clusters 448 * are allocated via the pool allocator, and we use KSEG to 449 * map those pages.) 450 */ 451 452 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 453 printf("avail memory = %s\n", pbuf); 454 } 455 456 int waittime = -1; 457 458 void 459 cpu_reboot(int howto, char *bootstr) 460 { 461 462 /* Take a snapshot before clobbering any registers. */ 463 if (curproc) 464 savectx((struct user *)curpcb); 465 466 if (cold) { 467 howto |= RB_HALT; 468 goto haltsys; 469 } 470 471 /* If "always halt" was specified as a boot flag, obey. */ 472 if (boothowto & RB_HALT) 473 howto |= RB_HALT; 474 475 boothowto = howto; 476 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) { 477 waittime = 0; 478 vfs_shutdown(); 479 480 /* 481 * If we've been adjusting the clock, the todr 482 * will be out of synch; adjust it now. 483 */ 484 resettodr(); 485 } 486 487 splhigh(); 488 489 if (howto & RB_DUMP) 490 dumpsys(); 491 492 haltsys: 493 doshutdownhooks(); 494 495 pmf_system_shutdown(boothowto); 496 497 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 498 /* 499 * Turning on GPIO1 as output will cause a powerdown. 500 */ 501 REGVAL(BONITO_GPIODATA) |= 2; 502 REGVAL(BONITO_GPIOIE) &= ~2; 503 } 504 505 if (howto & RB_HALT) { 506 printf("\n"); 507 printf("The operating system has halted.\n"); 508 printf("Please press any key to reboot.\n\n"); 509 cnpollc(1); /* For proper keyboard command handling */ 510 cngetc(); 511 cnpollc(0); 512 } 513 514 printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting..."); 515 516 /* 517 * Turning off GPIO2 as output will cause a reset. 518 */ 519 REGVAL(BONITO_GPIODATA) &= ~4; 520 REGVAL(BONITO_GPIOIE) &= ~4; 521 522 __asm__ __volatile__ ( 523 "\t.long 0x3c02bfc0\n" 524 "\t.long 0x00400008\n" 525 ::: "v0"); 526 } 527
Indexes created Mon Oct 20 20:10:13 GMT 2025