1 /* $NetBSD: machdep.c,v 1.72 2012/01/27 18:53:03 para Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: Utah Hdr: machdep.c 1.74 92/12/20 36 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 37 */ 38 39 /* 40 * Copyright (c) 2001 Matthew Fredette. 41 * Copyright (c) 1994, 1995 Gordon W. Ross 42 * Copyright (c) 1993 Adam Glass 43 * Copyright (c) 1988 University of Utah. 44 * 45 * This code is derived from software contributed to Berkeley by 46 * the Systems Programming Group of the University of Utah Computer 47 * Science Department. 48 * 49 * Redistribution and use in source and binary forms, with or without 50 * modification, are permitted provided that the following conditions 51 * are met: 52 * 1. Redistributions of source code must retain the above copyright 53 * notice, this list of conditions and the following disclaimer. 54 * 2. Redistributions in binary form must reproduce the above copyright 55 * notice, this list of conditions and the following disclaimer in the 56 * documentation and/or other materials provided with the distribution. 57 * 3. All advertising materials mentioning features or use of this software 58 * must display the following acknowledgement: 59 * This product includes software developed by the University of 60 * California, Berkeley and its contributors. 61 * 4. Neither the name of the University nor the names of its contributors 62 * may be used to endorse or promote products derived from this software 63 * without specific prior written permission. 64 * 65 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 66 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 67 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 68 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 69 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 70 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 71 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 72 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 73 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 74 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 75 * SUCH DAMAGE. 76 * 77 * from: Utah Hdr: machdep.c 1.74 92/12/20 78 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 79 */ 80 81 /*- 82 * Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc. 83 * All rights reserved. 84 * 85 * This code is derived from software contributed to The NetBSD Foundation 86 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 87 * NASA Ames Research Center. 88 * 89 * Redistribution and use in source and binary forms, with or without 90 * modification, are permitted provided that the following conditions 91 * are met: 92 * 1. Redistributions of source code must retain the above copyright 93 * notice, this list of conditions and the following disclaimer. 94 * 2. Redistributions in binary form must reproduce the above copyright 95 * notice, this list of conditions and the following disclaimer in the 96 * documentation and/or other materials provided with the distribution. 97 * 98 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 99 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 100 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 101 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 102 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 103 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 104 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 105 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 106 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 107 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 108 * POSSIBILITY OF SUCH DAMAGE. 109 */ 110 111 /* 112 * Copyright (c) 1992, 1993 113 * The Regents of the University of California. All rights reserved. 114 * 115 * This software was developed by the Computer Systems Engineering group 116 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 117 * contributed to Berkeley. 118 * 119 * All advertising materials mentioning features or use of this software 120 * must display the following acknowledgement: 121 * This product includes software developed by the University of 122 * California, Lawrence Berkeley Laboratory. 123 * 124 * Redistribution and use in source and binary forms, with or without 125 * modification, are permitted provided that the following conditions 126 * are met: 127 * 1. Redistributions of source code must retain the above copyright 128 * notice, this list of conditions and the following disclaimer. 129 * 2. Redistributions in binary form must reproduce the above copyright 130 * notice, this list of conditions and the following disclaimer in the 131 * documentation and/or other materials provided with the distribution. 132 * 3. Neither the name of the University nor the names of its contributors 133 * may be used to endorse or promote products derived from this software 134 * without specific prior written permission. 135 * 136 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 137 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 138 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 139 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 140 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 141 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 142 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 143 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 144 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 145 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 146 * SUCH DAMAGE. 147 * 148 * @(#)machdep.c 8.6 (Berkeley) 1/14/94 149 */ 150 151 #include <sys/cdefs.h> 152 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.72 2012/01/27 18:53:03 para Exp $"); 153 154 #include "opt_ddb.h" 155 #include "opt_kgdb.h" 156 #include "opt_fpu_emulate.h" 157 #include "opt_modular.h" 158 159 #include <sys/param.h> 160 #include <sys/systm.h> 161 #include <sys/kernel.h> 162 #include <sys/proc.h> 163 #include <sys/buf.h> 164 #include <sys/reboot.h> 165 #include <sys/conf.h> 166 #include <sys/file.h> 167 #include <sys/device.h> 168 #include <sys/malloc.h> 169 #include <sys/extent.h> 170 #include <sys/mbuf.h> 171 #include <sys/msgbuf.h> 172 #include <sys/ioctl.h> 173 #include <sys/tty.h> 174 #include <sys/mount.h> 175 #include <sys/exec.h> 176 #include <sys/exec_aout.h> /* for MID_* */ 177 #include <sys/core.h> 178 #include <sys/kcore.h> 179 #include <sys/vnode.h> 180 #include <sys/syscallargs.h> 181 #include <sys/ksyms.h> 182 #ifdef KGDB 183 #include <sys/kgdb.h> 184 #endif 185 186 #include <uvm/uvm.h> /* XXX: not _extern ... need vm_map_create */ 187 188 #include <sys/sysctl.h> 189 190 #include <dev/cons.h> 191 #include <dev/mm.h> 192 193 #include <machine/promlib.h> 194 #include <machine/cpu.h> 195 #include <machine/dvma.h> 196 #include <machine/idprom.h> 197 #include <machine/kcore.h> 198 #include <machine/reg.h> 199 #include <machine/pcb.h> 200 #include <machine/psl.h> 201 #include <machine/pte.h> 202 #define _SUN68K_BUS_DMA_PRIVATE 203 #include <machine/autoconf.h> 204 #include <machine/bus.h> 205 #include <machine/intr.h> 206 #include <machine/pmap.h> 207 208 #if defined(DDB) 209 #include <machine/db_machdep.h> 210 #include <ddb/db_sym.h> 211 #include <ddb/db_extern.h> 212 #endif 213 214 #include <dev/vme/vmereg.h> 215 #include <dev/vme/vmevar.h> 216 217 #include <sun2/sun2/control.h> 218 #include <sun2/sun2/enable.h> 219 #include <sun2/sun2/machdep.h> 220 221 #include <sun68k/sun68k/vme_sun68k.h> 222 223 #include "ksyms.h" 224 225 /* Defined in locore.s */ 226 extern char kernel_text[]; 227 /* Defined by the linker */ 228 extern char etext[]; 229 /* Defined in vfs_bio.c */ 230 extern u_int bufpages; 231 232 /* Our exported CPU info; we can have only one. */ 233 struct cpu_info cpu_info_store; 234 235 struct vm_map *phys_map = NULL; 236 237 int physmem; 238 int fputype; 239 void * msgbufaddr; 240 241 /* Virtual page frame for /dev/mem (see mem.c) */ 242 vaddr_t vmmap; 243 244 /* 245 * safepri is a safe priority for sleep to set for a spin-wait 246 * during autoconfiguration or after a panic. 247 */ 248 int safepri = PSL_LOWIPL; 249 250 /* Soft copy of the enable register. */ 251 volatile u_short enable_reg_soft = ENABLE_REG_SOFT_UNDEF; 252 253 /* 254 * Our no-fault fault handler. 255 */ 256 label_t *nofault; 257 258 /* 259 * dvmamap is used to manage DVMA memory. 260 */ 261 static struct extent *dvmamap; 262 263 /* Our private scratch page for dumping the MMU. */ 264 static vaddr_t dumppage; 265 266 static void identifycpu(void); 267 static void initcpu(void); 268 269 /* 270 * cpu_startup: allocate memory for variable-sized tables, 271 * initialize CPU, and do autoconfiguration. 272 * 273 * This is called early in init_main.c:main(), after the 274 * kernel memory allocator is ready for use, but before 275 * the creation of processes 1,2, and mountroot, etc. 276 */ 277 void 278 cpu_startup(void) 279 { 280 void *v; 281 vaddr_t minaddr, maxaddr; 282 char pbuf[9]; 283 284 /* 285 * Initialize message buffer (for kernel printf). 286 * This is put in physical pages four through seven 287 * so it will always be in the same place after a 288 * reboot. (physical pages 0-3 are reserved by the PROM 289 * for its vector table and other stuff.) 290 * Its mapping was prepared in pmap_bootstrap(). 291 * Also, offset some to avoid PROM scribbles. 292 */ 293 v = (void *) (PAGE_SIZE * 4); 294 msgbufaddr = (void *)((char *)v + MSGBUFOFF); 295 initmsgbuf(msgbufaddr, MSGBUFSIZE); 296 297 #if NKSYMS || defined(DDB) || defined(MODULAR) 298 { 299 extern int nsym; 300 extern char *ssym, *esym; 301 302 ksyms_addsyms_elf(nsym, ssym, esym); 303 } 304 #endif /* DDB */ 305 306 /* 307 * Good {morning,afternoon,evening,night}. 308 */ 309 printf("%s%s", copyright, version); 310 identifycpu(); 311 fputype = FPU_NONE; 312 #ifdef FPU_EMULATE 313 printf("fpu: emulator\n"); 314 #else 315 printf("fpu: no math support\n"); 316 #endif 317 318 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 319 printf("total memory = %s\n", pbuf); 320 321 /* 322 * XXX fredette - we force a small number of buffers 323 * to help me debug this on my low-memory machine. 324 * this should go away at some point, allowing the 325 * normal automatic buffer-sizing to happen. 326 */ 327 bufpages = 37; 328 329 /* 330 * Get scratch page for dumpsys(). 331 */ 332 if ((dumppage = uvm_km_alloc(kernel_map, PAGE_SIZE,0, UVM_KMF_WIRED)) 333 == 0) 334 panic("startup: alloc dumppage"); 335 336 337 minaddr = 0; 338 339 /* 340 * Allocate a submap for physio 341 */ 342 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 343 VM_PHYS_SIZE, 0, false, NULL); 344 345 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 346 printf("avail memory = %s\n", pbuf); 347 348 /* 349 * Allocate a virtual page (for use by /dev/mem) 350 * This page is handed to pmap_enter() therefore 351 * it has to be in the normal kernel VA range. 352 */ 353 vmmap = uvm_km_alloc(kernel_map, PAGE_SIZE, 0, 354 UVM_KMF_VAONLY | UVM_KMF_WAITVA); 355 356 /* 357 * Allocate DMA map for devices on the bus. 358 */ 359 dvmamap = extent_create("dvmamap", 360 DVMA_MAP_BASE, DVMA_MAP_BASE + DVMA_MAP_AVAIL, 361 0, 0, EX_NOWAIT); 362 if (dvmamap == NULL) 363 panic("unable to allocate DVMA map"); 364 365 /* 366 * Set up CPU-specific registers, cache, etc. 367 */ 368 initcpu(); 369 } 370 371 /* 372 * Info for CTL_HW 373 */ 374 char machine[16] = MACHINE; /* from <machine/param.h> */ 375 char kernel_arch[16] = "sun2"; /* XXX needs a sysctl node */ 376 char cpu_model[120]; 377 378 /* 379 * Determine which Sun2 model we are running on. 380 */ 381 void 382 identifycpu(void) 383 { 384 extern char *cpu_string; /* XXX */ 385 386 /* Other stuff? (VAC, mc6888x version, etc.) */ 387 /* Note: miniroot cares about the kernel_arch part. */ 388 sprintf(cpu_model, "%s %s", kernel_arch, cpu_string); 389 390 printf("Model: %s\n", cpu_model); 391 } 392 393 /* 394 * machine dependent system variables. 395 */ 396 #if 0 /* XXX - Not yet... */ 397 static int 398 sysctl_machdep_root_device(SYSCTLFN_ARGS) 399 { 400 struct sysctlnode node = *rnode; 401 402 node.sysctl_data = some permutation on root_device; 403 node.sysctl_size = strlen(root_device) + 1; 404 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 405 } 406 #endif 407 408 static int 409 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 410 { 411 struct sysctlnode node = *rnode; 412 char *cp; 413 414 cp = prom_getbootfile(); 415 if (cp == NULL || cp[0] == '\0') 416 return (ENOENT); 417 418 node.sysctl_data = cp; 419 node.sysctl_size = strlen(cp) + 1; 420 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 421 } 422 423 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 424 { 425 426 sysctl_createv(clog, 0, NULL, NULL, 427 CTLFLAG_PERMANENT, 428 CTLTYPE_NODE, "machdep", NULL, 429 NULL, 0, NULL, 0, 430 CTL_MACHDEP, CTL_EOL); 431 432 sysctl_createv(clog, 0, NULL, NULL, 433 CTLFLAG_PERMANENT, 434 CTLTYPE_STRUCT, "console_device", NULL, 435 sysctl_consdev, 0, NULL, sizeof(dev_t), 436 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 437 #if 0 /* XXX - Not yet... */ 438 sysctl_createv(clog, 0, NULL, NULL, 439 CTLFLAG_PERMANENT, 440 CTLTYPE_STRING, "root_device", NULL, 441 sysctl_machdep_root_device, 0, NULL, 0, 442 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 443 #endif 444 sysctl_createv(clog, 0, NULL, NULL, 445 CTLFLAG_PERMANENT, 446 CTLTYPE_STRING, "booted_kernel", NULL, 447 sysctl_machdep_booted_kernel, 0, NULL, 0, 448 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 449 } 450 451 /* See: sig_machdep.c */ 452 453 /* 454 * Do a sync in preparation for a reboot. 455 * XXX - This could probably be common code. 456 * XXX - And now, most of it is in vfs_shutdown() 457 * XXX - Put waittime checks in there too? 458 */ 459 int waittime = -1; /* XXX - Who else looks at this? -gwr */ 460 static void 461 reboot_sync(void) 462 { 463 464 /* Check waittime here to localize its use to this function. */ 465 if (waittime >= 0) 466 return; 467 waittime = 0; 468 vfs_shutdown(); 469 } 470 471 /* 472 * Common part of the BSD and SunOS reboot system calls. 473 */ 474 __dead void 475 cpu_reboot(int howto, char *user_boot_string) 476 { 477 char *bs, *p; 478 char default_boot_string[8]; 479 480 /* If system is cold, just halt. (early panic?) */ 481 if (cold) 482 goto haltsys; 483 484 /* Un-blank the screen if appropriate. */ 485 cnpollc(1); 486 487 if ((howto & RB_NOSYNC) == 0) { 488 reboot_sync(); 489 /* 490 * If we've been adjusting the clock, the todr 491 * will be out of synch; adjust it now. 492 * 493 * XXX - However, if the kernel has been sitting in ddb, 494 * the time will be way off, so don't set the HW clock! 495 * XXX - Should do sanity check against HW clock. -gwr 496 */ 497 /* resettodr(); */ 498 } 499 500 /* Disable interrupts. */ 501 splhigh(); 502 503 /* Write out a crash dump if asked. */ 504 if (howto & RB_DUMP) 505 dumpsys(); 506 507 /* run any shutdown hooks */ 508 doshutdownhooks(); 509 510 pmf_system_shutdown(boothowto); 511 512 if (howto & RB_HALT) { 513 haltsys: 514 printf("halted.\n"); 515 prom_halt(); 516 } 517 518 /* 519 * Automatic reboot. 520 */ 521 bs = user_boot_string; 522 if (bs == NULL) { 523 /* 524 * Build our own boot string with an empty 525 * boot device/file and (maybe) some flags. 526 * The PROM will supply the device/file name. 527 */ 528 bs = default_boot_string; 529 *bs = '\0'; 530 if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) { 531 /* Append the boot flags. */ 532 p = bs; 533 *p++ = ' '; 534 *p++ = '-'; 535 if (howto & RB_KDB) 536 *p++ = 'd'; 537 if (howto & RB_ASKNAME) 538 *p++ = 'a'; 539 if (howto & RB_SINGLE) 540 *p++ = 's'; 541 *p = '\0'; 542 } 543 } 544 printf("rebooting...\n"); 545 prom_boot(bs); 546 for (;;) ; 547 /*NOTREACHED*/ 548 } 549 550 /* 551 * These variables are needed by /sbin/savecore 552 */ 553 uint32_t dumpmag = 0x8fca0101; /* magic number */ 554 int dumpsize = 0; /* pages */ 555 long dumplo = 0; /* blocks */ 556 557 #define DUMP_EXTRA 3 /* CPU-dependent extra pages */ 558 559 /* 560 * This is called by main to set dumplo, dumpsize. 561 * Dumps always skip the first PAGE_SIZE of disk space 562 * in case there might be a disk label stored there. 563 * If there is extra space, put dump at the end to 564 * reduce the chance that swapping trashes it. 565 */ 566 void 567 cpu_dumpconf(void) 568 { 569 int devblks; /* size of dump device in blocks */ 570 int dumpblks; /* size of dump image in blocks */ 571 572 if (dumpdev == NODEV) 573 return; 574 575 devblks = bdev_size(dumpdev); 576 if (devblks <= ctod(1)) 577 return; 578 devblks &= ~(ctod(1)-1); 579 580 /* 581 * Note: savecore expects dumpsize to be the 582 * number of pages AFTER the dump header. 583 */ 584 dumpsize = physmem; 585 586 /* Position dump image near end of space, page aligned. */ 587 dumpblks = ctod(physmem + DUMP_EXTRA); 588 dumplo = devblks - dumpblks; 589 590 /* If it does not fit, truncate it by moving dumplo. */ 591 /* Note: Must force signed comparison. */ 592 if (dumplo < ((long)ctod(1))) { 593 dumplo = ctod(1); 594 dumpsize = dtoc(devblks - dumplo) - DUMP_EXTRA; 595 } 596 } 597 598 /* Note: gdb looks for "dumppcb" in a kernel crash dump. */ 599 struct pcb dumppcb; 600 extern paddr_t avail_start; 601 602 /* 603 * Write a crash dump. The format while in swap is: 604 * kcore_seg_t cpu_hdr; 605 * cpu_kcore_hdr_t cpu_data; 606 * padding (PAGE_SIZE-sizeof(kcore_seg_t)) 607 * pagemap (2*PAGE_SIZE) 608 * physical memory... 609 */ 610 void 611 dumpsys(void) 612 { 613 const struct bdevsw *dsw; 614 kcore_seg_t *kseg_p; 615 cpu_kcore_hdr_t *chdr_p; 616 struct sun2_kcore_hdr *sh; 617 char *vaddr; 618 paddr_t paddr; 619 int psize, todo, chunk; 620 daddr_t blkno; 621 int error = 0; 622 623 if (dumpdev == NODEV) 624 return; 625 dsw = bdevsw_lookup(dumpdev); 626 if (dsw == NULL || dsw->d_psize == NULL) 627 return; 628 if (dumppage == 0) 629 return; 630 631 /* 632 * For dumps during autoconfiguration, 633 * if dump device has already configured... 634 */ 635 if (dumpsize == 0) 636 cpu_dumpconf(); 637 if (dumplo <= 0) { 638 printf("\ndump to dev %u,%u not possible\n", 639 major(dumpdev), minor(dumpdev)); 640 return; 641 } 642 savectx(&dumppcb); 643 644 psize = bdev_size(dumpdev); 645 if (psize == -1) { 646 printf("dump area unavailable\n"); 647 return; 648 } 649 650 printf("\ndumping to dev %u,%u offset %ld\n", 651 major(dumpdev), minor(dumpdev), dumplo); 652 653 /* 654 * Prepare the dump header, including MMU state. 655 */ 656 blkno = dumplo; 657 todo = dumpsize; /* pages */ 658 vaddr = (char*)dumppage; 659 memset(vaddr, 0, PAGE_SIZE); 660 661 /* Set pointers to all three parts. */ 662 kseg_p = (kcore_seg_t *)vaddr; 663 chdr_p = (cpu_kcore_hdr_t *) (kseg_p + 1); 664 sh = &chdr_p->un._sun2; 665 666 /* Fill in kcore_seg_t part. */ 667 CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 668 kseg_p->c_size = (ctob(DUMP_EXTRA) - sizeof(*kseg_p)); 669 670 /* Fill in cpu_kcore_hdr_t part. */ 671 strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name)); 672 chdr_p->page_size = PAGE_SIZE; 673 chdr_p->kernbase = KERNBASE; 674 675 /* Fill in the sun2_kcore_hdr part (MMU state). */ 676 pmap_kcore_hdr(sh); 677 678 /* Write out the dump header. */ 679 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 680 if (error) 681 goto fail; 682 blkno += btodb(PAGE_SIZE); 683 684 /* translation RAM (pages zero through seven) */ 685 for(chunk = 0; chunk < (PAGE_SIZE * 8); chunk += PAGE_SIZE) { 686 pmap_get_pagemap((int*)vaddr, chunk); 687 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 688 if (error) 689 goto fail; 690 blkno += btodb(PAGE_SIZE); 691 } 692 693 /* 694 * Now dump physical memory. Have to do it in two chunks. 695 * The first chunk is "unmanaged" (by the VM code) and its 696 * range of physical addresses is not allow in pmap_enter. 697 * However, that segment is mapped linearly, so we can just 698 * use the virtual mappings already in place. The second 699 * chunk is done the normal way, using pmap_enter. 700 * 701 * Note that vaddr==(paddr+KERNBASE) for paddr=0 through etext. 702 */ 703 704 /* Do the first chunk (0 <= PA < avail_start) */ 705 paddr = 0; 706 chunk = btoc(avail_start); 707 if (chunk > todo) 708 chunk = todo; 709 do { 710 if ((todo & 0xf) == 0) 711 printf_nolog("\r%4d", todo); 712 vaddr = (char*)(paddr + KERNBASE); 713 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 714 if (error) 715 goto fail; 716 paddr += PAGE_SIZE; 717 blkno += btodb(PAGE_SIZE); 718 --todo; 719 } while (--chunk > 0); 720 721 /* Do the second chunk (avail_start <= PA < dumpsize) */ 722 vaddr = (char*)vmmap; /* Borrow /dev/mem VA */ 723 do { 724 if ((todo & 0xf) == 0) 725 printf_nolog("\r%4d", todo); 726 pmap_kenter_pa(vmmap, paddr | PMAP_NC, VM_PROT_READ, 0); 727 pmap_update(pmap_kernel()); 728 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 729 pmap_kremove(vmmap, PAGE_SIZE); 730 pmap_update(pmap_kernel()); 731 if (error) 732 goto fail; 733 paddr += PAGE_SIZE; 734 blkno += btodb(PAGE_SIZE); 735 } while (--todo > 0); 736 737 printf("\rdump succeeded\n"); 738 return; 739 fail: 740 printf(" dump error=%d\n", error); 741 } 742 743 static void 744 initcpu(void) 745 { 746 /* XXX: Enable RAM parity/ECC checking? */ 747 /* XXX: parityenable(); */ 748 749 } 750 751 /* straptrap() in trap.c */ 752 753 /* from hp300: badaddr() */ 754 755 /* XXX: parityenable() ? */ 756 /* regdump() moved to regdump.c */ 757 758 /* 759 * cpu_exec_aout_makecmds(): 760 * CPU-dependent a.out format hook for execve(). 761 * 762 * Determine if the given exec package refers to something which we 763 * understand and, if so, set up the vmcmds for it. 764 */ 765 int 766 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp) 767 { 768 return ENOEXEC; 769 } 770 771 #if 0 772 /* 773 * Soft interrupt support. 774 */ 775 void 776 isr_soft_request(int level) 777 { 778 u_char bit; 779 780 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 781 return; 782 783 bit = 1 << level; 784 enable_reg_or(bit); 785 } 786 787 void 788 isr_soft_clear(int level) 789 { 790 u_char bit; 791 792 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 793 return; 794 795 bit = 1 << level; 796 enable_reg_and(~bit); 797 } 798 #endif 799 800 /* 801 * Like _bus_dmamap_load(), but for raw memory allocated with 802 * bus_dmamem_alloc(). 803 */ 804 int 805 _bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, 806 int nsegs, bus_size_t size, int flags) 807 { 808 struct vm_page *m; 809 paddr_t pa; 810 bus_addr_t dva; 811 bus_size_t sgsize; 812 struct pglist *mlist; 813 int pagesz = PAGE_SIZE; 814 int error; 815 816 /* 817 * Make sure that on error condition we return "no valid mappings". 818 */ 819 map->dm_nsegs = 0; 820 map->dm_mapsize = 0; 821 822 /* Allocate DVMA addresses */ 823 sgsize = (size + pagesz - 1) & -pagesz; 824 825 /* 826 * If the device can see our entire 24-bit address space, 827 * we can use any properly aligned virtual addresses. 828 */ 829 if ((map->_dm_flags & BUS_DMA_24BIT) != 0) { 830 dva = _bus_dma_valloc_skewed(sgsize, map->_dm_boundary, 831 pagesz, 0); 832 if (dva == 0) 833 return (ENOMEM); 834 } 835 836 /* 837 * Otherwise, we need virtual addresses in DVMA space. 838 */ 839 else { 840 error = extent_alloc(dvmamap, sgsize, pagesz, 841 map->_dm_boundary, 842 (flags & BUS_DMA_NOWAIT) == 0 843 ? EX_WAITOK : EX_NOWAIT, 844 (u_long *)&dva); 845 if (error) 846 return (error); 847 } 848 849 /* Fill in the segment. */ 850 map->dm_segs[0].ds_addr = dva; 851 map->dm_segs[0].ds_len = size; 852 map->dm_segs[0]._ds_va = dva; 853 map->dm_segs[0]._ds_sgsize = sgsize; 854 855 /* Map physical pages into MMU */ 856 mlist = segs[0]._ds_mlist; 857 for (m = TAILQ_FIRST(mlist); m != NULL; m = TAILQ_NEXT(m,pageq.queue)) { 858 if (sgsize == 0) 859 panic("_bus_dmamap_load_raw: size botch"); 860 pa = VM_PAGE_TO_PHYS(m); 861 pmap_enter(pmap_kernel(), dva, 862 (pa & -pagesz) | PMAP_NC, 863 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 864 865 dva += pagesz; 866 sgsize -= pagesz; 867 } 868 pmap_update(pmap_kernel()); 869 870 /* Make the map truly valid. */ 871 map->dm_nsegs = 1; 872 map->dm_mapsize = size; 873 874 return (0); 875 } 876 877 /* 878 * load DMA map with a linear buffer. 879 */ 880 int 881 _bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 882 bus_size_t buflen, struct proc *p, int flags) 883 { 884 bus_size_t sgsize; 885 vaddr_t va = (vaddr_t)buf; 886 int pagesz = PAGE_SIZE; 887 bus_addr_t dva; 888 pmap_t pmap; 889 int rv; 890 891 /* 892 * Make sure that on error condition we return "no valid mappings". 893 */ 894 map->dm_nsegs = 0; 895 map->dm_mapsize = 0; 896 897 if (buflen > map->_dm_size) 898 return (EINVAL); 899 900 /* 901 * A 24-bit device can see all of our kernel address space, so 902 * if we have KVAs, we can just load them as-is, no mapping 903 * necessary. 904 */ 905 if ((map->_dm_flags & BUS_DMA_24BIT) != 0 && p == NULL) { 906 /* 907 * XXX Need to implement "don't DMA across this boundry". 908 */ 909 if (map->_dm_boundary != 0) 910 panic("bus_dmamap_load: boundaries not implemented"); 911 map->dm_mapsize = buflen; 912 map->dm_nsegs = 1; 913 map->dm_segs[0].ds_addr = (bus_addr_t)va; 914 map->dm_segs[0].ds_len = buflen; 915 map->_dm_flags |= _BUS_DMA_DIRECTMAP; 916 return (0); 917 } 918 919 /* 920 * Allocate a region in DVMA space. 921 */ 922 sgsize = m68k_round_page(buflen + (va & (pagesz - 1))); 923 924 if (extent_alloc(dvmamap, sgsize, pagesz, map->_dm_boundary, 925 (flags & BUS_DMA_NOWAIT) == 0 ? EX_WAITOK : EX_NOWAIT, 926 (u_long *)&dva) != 0) { 927 return (ENOMEM); 928 } 929 930 /* Fill in the segment. */ 931 map->dm_segs[0].ds_addr = dva + (va & (pagesz - 1)); 932 map->dm_segs[0].ds_len = buflen; 933 map->dm_segs[0]._ds_va = dva; 934 map->dm_segs[0]._ds_sgsize = sgsize; 935 936 /* 937 * Now map the DVMA addresses we allocated to point to the 938 * pages of the caller's buffer. 939 */ 940 if (p != NULL) 941 pmap = p->p_vmspace->vm_map.pmap; 942 else 943 pmap = pmap_kernel(); 944 945 for (; buflen > 0; ) { 946 paddr_t pa; 947 /* 948 * Get the physical address for this page. 949 */ 950 rv = pmap_extract(pmap, va, &pa); 951 #ifdef DIAGNOSTIC 952 if (!rv) 953 panic("_bus_dmamap_load: no page"); 954 #endif /* DIAGNOSTIC */ 955 956 /* 957 * Compute the segment size, and adjust counts. 958 */ 959 sgsize = pagesz - (va & (pagesz - 1)); 960 if (buflen < sgsize) 961 sgsize = buflen; 962 963 pmap_enter(pmap_kernel(), dva, 964 (pa & -pagesz) | PMAP_NC, 965 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 966 967 dva += pagesz; 968 va += sgsize; 969 buflen -= sgsize; 970 } 971 pmap_update(pmap_kernel()); 972 973 /* Make the map truly valid. */ 974 map->dm_nsegs = 1; 975 map->dm_mapsize = map->dm_segs[0].ds_len; 976 977 return (0); 978 } 979 980 /* 981 * unload a DMA map. 982 */ 983 void 984 _bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 985 { 986 bus_dma_segment_t *segs = map->dm_segs; 987 int nsegs = map->dm_nsegs; 988 int flags = map->_dm_flags; 989 bus_addr_t dva; 990 bus_size_t len; 991 int s, error; 992 993 if (nsegs != 1) 994 panic("_bus_dmamem_unload: nsegs = %d", nsegs); 995 996 /* 997 * _BUS_DMA_DIRECTMAP is set iff this map was loaded using 998 * _bus_dmamap_load for a 24-bit device. 999 */ 1000 if ((flags & _BUS_DMA_DIRECTMAP) != 0) { 1001 /* Nothing to release */ 1002 map->_dm_flags &= ~_BUS_DMA_DIRECTMAP; 1003 } 1004 1005 /* 1006 * Otherwise, this map was loaded using _bus_dmamap_load for a 1007 * non-24-bit device, or using _bus_dmamap_load_raw. 1008 */ 1009 else { 1010 dva = segs[0]._ds_va & -PAGE_SIZE; 1011 len = segs[0]._ds_sgsize; 1012 1013 /* 1014 * Unmap the DVMA addresses. 1015 */ 1016 pmap_remove(pmap_kernel(), dva, dva + len); 1017 pmap_update(pmap_kernel()); 1018 1019 /* 1020 * Free the DVMA addresses. 1021 */ 1022 if ((flags & BUS_DMA_24BIT) != 0) { 1023 /* 1024 * This map was loaded using _bus_dmamap_load_raw 1025 * for a 24-bit device. 1026 */ 1027 uvm_unmap(kernel_map, dva, dva + len); 1028 } else { 1029 /* 1030 * This map was loaded using _bus_dmamap_load or 1031 * _bus_dmamap_load_raw for a non-24-bit device. 1032 */ 1033 s = splhigh(); 1034 error = extent_free(dvmamap, dva, len, EX_NOWAIT); 1035 splx(s); 1036 if (error != 0) 1037 printf("warning: %ld of DVMA space lost\n", len); 1038 } 1039 } 1040 1041 /* Mark the mappings as invalid. */ 1042 map->dm_mapsize = 0; 1043 map->dm_nsegs = 0; 1044 } 1045 1046 /* 1047 * Translate a VME address and address modifier 1048 * into a CPU physical address and page type. 1049 */ 1050 int 1051 vmebus_translate(vme_am_t mod, vme_addr_t addr, bus_type_t *btp, 1052 bus_addr_t *bap) 1053 { 1054 bus_addr_t base; 1055 1056 switch(mod) { 1057 #define _DS (VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA) 1058 1059 case (VME_AM_A16|_DS): 1060 base = 0x00ff0000; 1061 break; 1062 1063 case (VME_AM_A24|_DS): 1064 base = 0; 1065 break; 1066 1067 default: 1068 return (ENOENT); 1069 #undef _DS 1070 } 1071 1072 *bap = base | addr; 1073 *btp = (*bap & 0x800000 ? PMAP_VME8 : PMAP_VME0); 1074 return (0); 1075 } 1076 1077 /* 1078 * If we can find a mapping that was established by the PROM, use it. 1079 */ 1080 int 1081 find_prom_map(paddr_t pa, bus_type_t iospace, int len, vaddr_t *vap) 1082 { 1083 u_long pf; 1084 int pgtype; 1085 vaddr_t va, eva; 1086 int sme; 1087 u_long pte; 1088 int saved_ctx; 1089 1090 /* 1091 * The mapping must fit entirely within one page. 1092 */ 1093 if ((((u_long)pa & PGOFSET) + len) > PAGE_SIZE) 1094 return EINVAL; 1095 1096 pf = PA_PGNUM(pa); 1097 pgtype = iospace << PG_MOD_SHIFT; 1098 saved_ctx = kernel_context(); 1099 1100 /* 1101 * Walk the PROM address space, looking for a page with the 1102 * mapping we want. 1103 */ 1104 for (va = SUN_MONSTART; va < SUN_MONEND; ) { 1105 1106 /* 1107 * Make sure this segment is mapped. 1108 */ 1109 sme = get_segmap(va); 1110 if (sme == SEGINV) { 1111 va += NBSG; 1112 continue; /* next segment */ 1113 } 1114 1115 /* 1116 * Walk the pages of this segment. 1117 */ 1118 for(eva = va + NBSG; va < eva; va += PAGE_SIZE) { 1119 pte = get_pte(va); 1120 1121 if ((pte & (PG_VALID | PG_TYPE)) == 1122 (PG_VALID | pgtype) && 1123 PG_PFNUM(pte) == pf) 1124 { 1125 /* 1126 * Found the PROM mapping. 1127 * note: preserve page offset 1128 */ 1129 *vap = (va | ((vaddr_t)pa & PGOFSET)); 1130 restore_context(saved_ctx); 1131 return 0; 1132 } 1133 } 1134 } 1135 restore_context(saved_ctx); 1136 return ENOENT; 1137 } 1138 1139 int 1140 mm_md_physacc(paddr_t pa, vm_prot_t prot) 1141 { 1142 1143 /* Allow access only in "managed" RAM. */ 1144 if (pa < avail_start || pa >= avail_end) 1145 return EFAULT; 1146 return 0; 1147 } 1148 1149 bool 1150 mm_md_direct_mapped_phys(paddr_t paddr, vaddr_t *vaddr) 1151 { 1152 1153 if (paddr >= avail_start) 1154 return false; 1155 *vaddr = paddr; 1156 return true; 1157 } 1158 1159 /* 1160 * Allow access to the PROM mapping similiar to uvm_kernacc(). 1161 */ 1162 int 1163 mm_md_kernacc(void *ptr, vm_prot_t prot, bool *handled) 1164 { 1165 1166 if ((vaddr_t)ptr < SUN2_PROM_BASE || (vaddr_t)ptr > SUN2_MONEND) { 1167 *handled = false; 1168 return 0; 1169 } 1170 1171 *handled = true; 1172 /* Read in the PROM itself is OK, write not. */ 1173 if ((prot & VM_PROT_WRITE) == 0) 1174 return 0; 1175 return EFAULT; 1176 } 1177