1 /* $NetBSD: machdep.c,v 1.77 2014/03/24 18:50:31 christos 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 1.77 2014/03/24 18:50:31 christos 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 #include <sys/cpu.h> 183 #ifdef KGDB 184 #include <sys/kgdb.h> 185 #endif 186 187 #include <uvm/uvm.h> /* XXX: not _extern ... need vm_map_create */ 188 189 #include <sys/sysctl.h> 190 191 #include <dev/cons.h> 192 #include <dev/mm.h> 193 194 #include <machine/promlib.h> 195 #include <machine/cpu.h> 196 #include <machine/dvma.h> 197 #include <machine/idprom.h> 198 #include <machine/kcore.h> 199 #include <machine/reg.h> 200 #include <machine/pcb.h> 201 #include <machine/psl.h> 202 #include <machine/pte.h> 203 #define _SUN68K_BUS_DMA_PRIVATE 204 #include <machine/autoconf.h> 205 #include <machine/bus.h> 206 #include <machine/intr.h> 207 #include <machine/pmap.h> 208 209 #if defined(DDB) 210 #include <machine/db_machdep.h> 211 #include <ddb/db_sym.h> 212 #include <ddb/db_extern.h> 213 #endif 214 215 #include <dev/vme/vmereg.h> 216 #include <dev/vme/vmevar.h> 217 218 #include <sun2/sun2/control.h> 219 #include <sun2/sun2/enable.h> 220 #include <sun2/sun2/machdep.h> 221 222 #include <sun68k/sun68k/vme_sun68k.h> 223 224 #include "ksyms.h" 225 226 /* Defined in locore.s */ 227 extern char kernel_text[]; 228 /* Defined by the linker */ 229 extern char etext[]; 230 /* Defined in vfs_bio.c */ 231 extern u_int bufpages; 232 233 /* Our exported CPU info; we can have only one. */ 234 struct cpu_info cpu_info_store; 235 236 struct vm_map *phys_map = NULL; 237 238 int fputype; 239 void * msgbufaddr; 240 241 /* Virtual page frame for /dev/mem (see mem.c) */ 242 vaddr_t vmmap; 243 244 /* Soft copy of the enable register. */ 245 volatile u_short enable_reg_soft = ENABLE_REG_SOFT_UNDEF; 246 247 /* 248 * Our no-fault fault handler. 249 */ 250 label_t *nofault; 251 252 /* 253 * dvmamap is used to manage DVMA memory. 254 */ 255 static struct extent *dvmamap; 256 257 /* Our private scratch page for dumping the MMU. */ 258 static vaddr_t dumppage; 259 260 static void identifycpu(void); 261 static void initcpu(void); 262 263 /* 264 * cpu_startup: allocate memory for variable-sized tables, 265 * initialize CPU, and do autoconfiguration. 266 * 267 * This is called early in init_main.c:main(), after the 268 * kernel memory allocator is ready for use, but before 269 * the creation of processes 1,2, and mountroot, etc. 270 */ 271 void 272 cpu_startup(void) 273 { 274 void *v; 275 vaddr_t minaddr, maxaddr; 276 char pbuf[9]; 277 278 /* 279 * Initialize message buffer (for kernel printf). 280 * This is put in physical pages four through seven 281 * so it will always be in the same place after a 282 * reboot. (physical pages 0-3 are reserved by the PROM 283 * for its vector table and other stuff.) 284 * Its mapping was prepared in pmap_bootstrap(). 285 * Also, offset some to avoid PROM scribbles. 286 */ 287 v = (void *) (PAGE_SIZE * 4); 288 msgbufaddr = (void *)((char *)v + MSGBUFOFF); 289 initmsgbuf(msgbufaddr, MSGBUFSIZE); 290 291 #if NKSYMS || defined(DDB) || defined(MODULAR) 292 { 293 extern int nsym; 294 extern char *ssym, *esym; 295 296 ksyms_addsyms_elf(nsym, ssym, esym); 297 } 298 #endif /* DDB */ 299 300 /* 301 * Good {morning,afternoon,evening,night}. 302 */ 303 printf("%s%s", copyright, version); 304 identifycpu(); 305 fputype = FPU_NONE; 306 #ifdef FPU_EMULATE 307 printf("fpu: emulator\n"); 308 #else 309 printf("fpu: no math support\n"); 310 #endif 311 312 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 313 printf("total memory = %s\n", pbuf); 314 315 /* 316 * XXX fredette - we force a small number of buffers 317 * to help me debug this on my low-memory machine. 318 * this should go away at some point, allowing the 319 * normal automatic buffer-sizing to happen. 320 */ 321 bufpages = 37; 322 323 /* 324 * Get scratch page for dumpsys(). 325 */ 326 if ((dumppage = uvm_km_alloc(kernel_map, PAGE_SIZE,0, UVM_KMF_WIRED)) 327 == 0) 328 panic("startup: alloc dumppage"); 329 330 331 minaddr = 0; 332 333 /* 334 * Allocate a submap for physio 335 */ 336 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 337 VM_PHYS_SIZE, 0, false, NULL); 338 339 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 340 printf("avail memory = %s\n", pbuf); 341 342 /* 343 * Allocate a virtual page (for use by /dev/mem) 344 * This page is handed to pmap_enter() therefore 345 * it has to be in the normal kernel VA range. 346 */ 347 vmmap = uvm_km_alloc(kernel_map, PAGE_SIZE, 0, 348 UVM_KMF_VAONLY | UVM_KMF_WAITVA); 349 350 /* 351 * Allocate DMA map for devices on the bus. 352 */ 353 dvmamap = extent_create("dvmamap", 354 DVMA_MAP_BASE, DVMA_MAP_BASE + DVMA_MAP_AVAIL, 355 0, 0, EX_NOWAIT); 356 if (dvmamap == NULL) 357 panic("unable to allocate DVMA map"); 358 359 /* 360 * Set up CPU-specific registers, cache, etc. 361 */ 362 initcpu(); 363 } 364 365 /* 366 * Info for CTL_HW 367 */ 368 char machine[16] = MACHINE; /* from <machine/param.h> */ 369 char kernel_arch[16] = "sun2"; /* XXX needs a sysctl node */ 370 371 /* 372 * Determine which Sun2 model we are running on. 373 */ 374 void 375 identifycpu(void) 376 { 377 extern char *cpu_string; /* XXX */ 378 379 /* Other stuff? (VAC, mc6888x version, etc.) */ 380 /* Note: miniroot cares about the kernel_arch part. */ 381 cpu_setmodel("%s %s", kernel_arch, cpu_string); 382 383 printf("Model: %s\n", cpu_getmodel()); 384 } 385 386 /* 387 * machine dependent system variables. 388 */ 389 #if 0 /* XXX - Not yet... */ 390 static int 391 sysctl_machdep_root_device(SYSCTLFN_ARGS) 392 { 393 struct sysctlnode node = *rnode; 394 395 node.sysctl_data = some permutation on root_device; 396 node.sysctl_size = strlen(root_device) + 1; 397 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 398 } 399 #endif 400 401 static int 402 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 403 { 404 struct sysctlnode node = *rnode; 405 char *cp; 406 407 cp = prom_getbootfile(); 408 if (cp == NULL || cp[0] == '\0') 409 return (ENOENT); 410 411 node.sysctl_data = cp; 412 node.sysctl_size = strlen(cp) + 1; 413 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 414 } 415 416 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 417 { 418 419 sysctl_createv(clog, 0, NULL, NULL, 420 CTLFLAG_PERMANENT, 421 CTLTYPE_NODE, "machdep", NULL, 422 NULL, 0, NULL, 0, 423 CTL_MACHDEP, CTL_EOL); 424 425 sysctl_createv(clog, 0, NULL, NULL, 426 CTLFLAG_PERMANENT, 427 CTLTYPE_STRUCT, "console_device", NULL, 428 sysctl_consdev, 0, NULL, sizeof(dev_t), 429 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 430 #if 0 /* XXX - Not yet... */ 431 sysctl_createv(clog, 0, NULL, NULL, 432 CTLFLAG_PERMANENT, 433 CTLTYPE_STRING, "root_device", NULL, 434 sysctl_machdep_root_device, 0, NULL, 0, 435 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 436 #endif 437 sysctl_createv(clog, 0, NULL, NULL, 438 CTLFLAG_PERMANENT, 439 CTLTYPE_STRING, "booted_kernel", NULL, 440 sysctl_machdep_booted_kernel, 0, NULL, 0, 441 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 442 } 443 444 /* See: sig_machdep.c */ 445 446 /* 447 * Do a sync in preparation for a reboot. 448 * XXX - This could probably be common code. 449 * XXX - And now, most of it is in vfs_shutdown() 450 * XXX - Put waittime checks in there too? 451 */ 452 int waittime = -1; /* XXX - Who else looks at this? -gwr */ 453 static void 454 reboot_sync(void) 455 { 456 457 /* Check waittime here to localize its use to this function. */ 458 if (waittime >= 0) 459 return; 460 waittime = 0; 461 vfs_shutdown(); 462 } 463 464 /* 465 * Common part of the BSD and SunOS reboot system calls. 466 */ 467 __dead void 468 cpu_reboot(int howto, char *user_boot_string) 469 { 470 char *bs, *p; 471 char default_boot_string[8]; 472 473 /* If system is cold, just halt. (early panic?) */ 474 if (cold) 475 goto haltsys; 476 477 /* Un-blank the screen if appropriate. */ 478 cnpollc(1); 479 480 if ((howto & RB_NOSYNC) == 0) { 481 reboot_sync(); 482 /* 483 * If we've been adjusting the clock, the todr 484 * will be out of synch; adjust it now. 485 * 486 * XXX - However, if the kernel has been sitting in ddb, 487 * the time will be way off, so don't set the HW clock! 488 * XXX - Should do sanity check against HW clock. -gwr 489 */ 490 /* resettodr(); */ 491 } 492 493 /* Disable interrupts. */ 494 splhigh(); 495 496 /* Write out a crash dump if asked. */ 497 if (howto & RB_DUMP) 498 dumpsys(); 499 500 /* run any shutdown hooks */ 501 doshutdownhooks(); 502 503 pmf_system_shutdown(boothowto); 504 505 if (howto & RB_HALT) { 506 haltsys: 507 printf("halted.\n"); 508 prom_halt(); 509 } 510 511 /* 512 * Automatic reboot. 513 */ 514 bs = user_boot_string; 515 if (bs == NULL) { 516 /* 517 * Build our own boot string with an empty 518 * boot device/file and (maybe) some flags. 519 * The PROM will supply the device/file name. 520 */ 521 bs = default_boot_string; 522 *bs = '\0'; 523 if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) { 524 /* Append the boot flags. */ 525 p = bs; 526 *p++ = ' '; 527 *p++ = '-'; 528 if (howto & RB_KDB) 529 *p++ = 'd'; 530 if (howto & RB_ASKNAME) 531 *p++ = 'a'; 532 if (howto & RB_SINGLE) 533 *p++ = 's'; 534 *p = '\0'; 535 } 536 } 537 printf("rebooting...\n"); 538 prom_boot(bs); 539 for (;;) ; 540 /*NOTREACHED*/ 541 } 542 543 /* 544 * These variables are needed by /sbin/savecore 545 */ 546 uint32_t dumpmag = 0x8fca0101; /* magic number */ 547 int dumpsize = 0; /* pages */ 548 long dumplo = 0; /* blocks */ 549 550 #define DUMP_EXTRA 3 /* CPU-dependent extra pages */ 551 552 /* 553 * This is called by main to set dumplo, dumpsize. 554 * Dumps always skip the first PAGE_SIZE of disk space 555 * in case there might be a disk label stored there. 556 * If there is extra space, put dump at the end to 557 * reduce the chance that swapping trashes it. 558 */ 559 void 560 cpu_dumpconf(void) 561 { 562 int devblks; /* size of dump device in blocks */ 563 int dumpblks; /* size of dump image in blocks */ 564 565 if (dumpdev == NODEV) 566 return; 567 568 devblks = bdev_size(dumpdev); 569 if (devblks <= ctod(1)) 570 return; 571 devblks &= ~(ctod(1)-1); 572 573 /* 574 * Note: savecore expects dumpsize to be the 575 * number of pages AFTER the dump header. 576 */ 577 dumpsize = physmem; 578 579 /* Position dump image near end of space, page aligned. */ 580 dumpblks = ctod(physmem + DUMP_EXTRA); 581 dumplo = devblks - dumpblks; 582 583 /* If it does not fit, truncate it by moving dumplo. */ 584 /* Note: Must force signed comparison. */ 585 if (dumplo < ((long)ctod(1))) { 586 dumplo = ctod(1); 587 dumpsize = dtoc(devblks - dumplo) - DUMP_EXTRA; 588 } 589 } 590 591 /* Note: gdb looks for "dumppcb" in a kernel crash dump. */ 592 struct pcb dumppcb; 593 extern paddr_t avail_start; 594 595 /* 596 * Write a crash dump. The format while in swap is: 597 * kcore_seg_t cpu_hdr; 598 * cpu_kcore_hdr_t cpu_data; 599 * padding (PAGE_SIZE-sizeof(kcore_seg_t)) 600 * pagemap (2*PAGE_SIZE) 601 * physical memory... 602 */ 603 void 604 dumpsys(void) 605 { 606 const struct bdevsw *dsw; 607 kcore_seg_t *kseg_p; 608 cpu_kcore_hdr_t *chdr_p; 609 struct sun2_kcore_hdr *sh; 610 char *vaddr; 611 paddr_t paddr; 612 int psize, todo, chunk; 613 daddr_t blkno; 614 int error = 0; 615 616 if (dumpdev == NODEV) 617 return; 618 dsw = bdevsw_lookup(dumpdev); 619 if (dsw == NULL || dsw->d_psize == NULL) 620 return; 621 if (dumppage == 0) 622 return; 623 624 /* 625 * For dumps during autoconfiguration, 626 * if dump device has already configured... 627 */ 628 if (dumpsize == 0) 629 cpu_dumpconf(); 630 if (dumplo <= 0) { 631 printf("\ndump to dev %u,%u not possible\n", 632 major(dumpdev), minor(dumpdev)); 633 return; 634 } 635 savectx(&dumppcb); 636 637 psize = bdev_size(dumpdev); 638 if (psize == -1) { 639 printf("dump area unavailable\n"); 640 return; 641 } 642 643 printf("\ndumping to dev %u,%u offset %ld\n", 644 major(dumpdev), minor(dumpdev), dumplo); 645 646 /* 647 * Prepare the dump header, including MMU state. 648 */ 649 blkno = dumplo; 650 todo = dumpsize; /* pages */ 651 vaddr = (char*)dumppage; 652 memset(vaddr, 0, PAGE_SIZE); 653 654 /* Set pointers to all three parts. */ 655 kseg_p = (kcore_seg_t *)vaddr; 656 chdr_p = (cpu_kcore_hdr_t *) (kseg_p + 1); 657 sh = &chdr_p->un._sun2; 658 659 /* Fill in kcore_seg_t part. */ 660 CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 661 kseg_p->c_size = (ctob(DUMP_EXTRA) - sizeof(*kseg_p)); 662 663 /* Fill in cpu_kcore_hdr_t part. */ 664 strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name)); 665 chdr_p->page_size = PAGE_SIZE; 666 chdr_p->kernbase = KERNBASE; 667 668 /* Fill in the sun2_kcore_hdr part (MMU state). */ 669 pmap_kcore_hdr(sh); 670 671 /* Write out the dump header. */ 672 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 673 if (error) 674 goto fail; 675 blkno += btodb(PAGE_SIZE); 676 677 /* translation RAM (pages zero through seven) */ 678 for(chunk = 0; chunk < (PAGE_SIZE * 8); chunk += PAGE_SIZE) { 679 pmap_get_pagemap((int*)vaddr, chunk); 680 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 681 if (error) 682 goto fail; 683 blkno += btodb(PAGE_SIZE); 684 } 685 686 /* 687 * Now dump physical memory. Have to do it in two chunks. 688 * The first chunk is "unmanaged" (by the VM code) and its 689 * range of physical addresses is not allow in pmap_enter. 690 * However, that segment is mapped linearly, so we can just 691 * use the virtual mappings already in place. The second 692 * chunk is done the normal way, using pmap_enter. 693 * 694 * Note that vaddr==(paddr+KERNBASE) for paddr=0 through etext. 695 */ 696 697 /* Do the first chunk (0 <= PA < avail_start) */ 698 paddr = 0; 699 chunk = btoc(avail_start); 700 if (chunk > todo) 701 chunk = todo; 702 do { 703 if ((todo & 0xf) == 0) 704 printf_nolog("\r%4d", todo); 705 vaddr = (char*)(paddr + KERNBASE); 706 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 707 if (error) 708 goto fail; 709 paddr += PAGE_SIZE; 710 blkno += btodb(PAGE_SIZE); 711 --todo; 712 } while (--chunk > 0); 713 714 /* Do the second chunk (avail_start <= PA < dumpsize) */ 715 vaddr = (char*)vmmap; /* Borrow /dev/mem VA */ 716 do { 717 if ((todo & 0xf) == 0) 718 printf_nolog("\r%4d", todo); 719 pmap_kenter_pa(vmmap, paddr | PMAP_NC, VM_PROT_READ, 0); 720 pmap_update(pmap_kernel()); 721 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 722 pmap_kremove(vmmap, PAGE_SIZE); 723 pmap_update(pmap_kernel()); 724 if (error) 725 goto fail; 726 paddr += PAGE_SIZE; 727 blkno += btodb(PAGE_SIZE); 728 } while (--todo > 0); 729 730 printf("\rdump succeeded\n"); 731 return; 732 fail: 733 printf(" dump error=%d\n", error); 734 } 735 736 static void 737 initcpu(void) 738 { 739 /* XXX: Enable RAM parity/ECC checking? */ 740 /* XXX: parityenable(); */ 741 742 } 743 744 /* straptrap() in trap.c */ 745 746 /* from hp300: badaddr() */ 747 748 /* XXX: parityenable() ? */ 749 /* regdump() moved to regdump.c */ 750 751 /* 752 * cpu_exec_aout_makecmds(): 753 * CPU-dependent a.out format hook for execve(). 754 * 755 * Determine if the given exec package refers to something which we 756 * understand and, if so, set up the vmcmds for it. 757 */ 758 int 759 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp) 760 { 761 return ENOEXEC; 762 } 763 764 #if 0 765 /* 766 * Soft interrupt support. 767 */ 768 void 769 isr_soft_request(int level) 770 { 771 u_char bit; 772 773 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 774 return; 775 776 bit = 1 << level; 777 enable_reg_or(bit); 778 } 779 780 void 781 isr_soft_clear(int level) 782 { 783 u_char bit; 784 785 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 786 return; 787 788 bit = 1 << level; 789 enable_reg_and(~bit); 790 } 791 #endif 792 793 /* 794 * Like _bus_dmamap_load(), but for raw memory allocated with 795 * bus_dmamem_alloc(). 796 */ 797 int 798 _bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, 799 int nsegs, bus_size_t size, int flags) 800 { 801 struct vm_page *m; 802 paddr_t pa; 803 bus_addr_t dva; 804 bus_size_t sgsize; 805 struct pglist *mlist; 806 int pagesz = PAGE_SIZE; 807 int error; 808 809 /* 810 * Make sure that on error condition we return "no valid mappings". 811 */ 812 map->dm_nsegs = 0; 813 map->dm_mapsize = 0; 814 815 /* Allocate DVMA addresses */ 816 sgsize = (size + pagesz - 1) & -pagesz; 817 818 /* 819 * If the device can see our entire 24-bit address space, 820 * we can use any properly aligned virtual addresses. 821 */ 822 if ((map->_dm_flags & BUS_DMA_24BIT) != 0) { 823 dva = _bus_dma_valloc_skewed(sgsize, map->_dm_boundary, 824 pagesz, 0); 825 if (dva == 0) 826 return (ENOMEM); 827 } 828 829 /* 830 * Otherwise, we need virtual addresses in DVMA space. 831 */ 832 else { 833 error = extent_alloc(dvmamap, sgsize, pagesz, 834 map->_dm_boundary, 835 (flags & BUS_DMA_NOWAIT) == 0 836 ? EX_WAITOK : EX_NOWAIT, 837 (u_long *)&dva); 838 if (error) 839 return (error); 840 } 841 842 /* Fill in the segment. */ 843 map->dm_segs[0].ds_addr = dva; 844 map->dm_segs[0].ds_len = size; 845 map->dm_segs[0]._ds_va = dva; 846 map->dm_segs[0]._ds_sgsize = sgsize; 847 848 /* Map physical pages into MMU */ 849 mlist = segs[0]._ds_mlist; 850 for (m = TAILQ_FIRST(mlist); m != NULL; m = TAILQ_NEXT(m,pageq.queue)) { 851 if (sgsize == 0) 852 panic("_bus_dmamap_load_raw: size botch"); 853 pa = VM_PAGE_TO_PHYS(m); 854 pmap_enter(pmap_kernel(), dva, 855 (pa & -pagesz) | PMAP_NC, 856 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 857 858 dva += pagesz; 859 sgsize -= pagesz; 860 } 861 pmap_update(pmap_kernel()); 862 863 /* Make the map truly valid. */ 864 map->dm_nsegs = 1; 865 map->dm_mapsize = size; 866 867 return (0); 868 } 869 870 /* 871 * load DMA map with a linear buffer. 872 */ 873 int 874 _bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 875 bus_size_t buflen, struct proc *p, int flags) 876 { 877 bus_size_t sgsize; 878 vaddr_t va = (vaddr_t)buf; 879 int pagesz = PAGE_SIZE; 880 bus_addr_t dva; 881 pmap_t pmap; 882 int rv __diagused; 883 884 /* 885 * Make sure that on error condition we return "no valid mappings". 886 */ 887 map->dm_nsegs = 0; 888 map->dm_mapsize = 0; 889 890 if (buflen > map->_dm_size) 891 return (EINVAL); 892 893 /* 894 * A 24-bit device can see all of our kernel address space, so 895 * if we have KVAs, we can just load them as-is, no mapping 896 * necessary. 897 */ 898 if ((map->_dm_flags & BUS_DMA_24BIT) != 0 && p == NULL) { 899 /* 900 * XXX Need to implement "don't DMA across this boundry". 901 */ 902 if (map->_dm_boundary != 0) 903 panic("bus_dmamap_load: boundaries not implemented"); 904 map->dm_mapsize = buflen; 905 map->dm_nsegs = 1; 906 map->dm_segs[0].ds_addr = (bus_addr_t)va; 907 map->dm_segs[0].ds_len = buflen; 908 map->_dm_flags |= _BUS_DMA_DIRECTMAP; 909 return (0); 910 } 911 912 /* 913 * Allocate a region in DVMA space. 914 */ 915 sgsize = m68k_round_page(buflen + (va & (pagesz - 1))); 916 917 if (extent_alloc(dvmamap, sgsize, pagesz, map->_dm_boundary, 918 (flags & BUS_DMA_NOWAIT) == 0 ? EX_WAITOK : EX_NOWAIT, 919 (u_long *)&dva) != 0) { 920 return (ENOMEM); 921 } 922 923 /* Fill in the segment. */ 924 map->dm_segs[0].ds_addr = dva + (va & (pagesz - 1)); 925 map->dm_segs[0].ds_len = buflen; 926 map->dm_segs[0]._ds_va = dva; 927 map->dm_segs[0]._ds_sgsize = sgsize; 928 929 /* 930 * Now map the DVMA addresses we allocated to point to the 931 * pages of the caller's buffer. 932 */ 933 if (p != NULL) 934 pmap = p->p_vmspace->vm_map.pmap; 935 else 936 pmap = pmap_kernel(); 937 938 for (; buflen > 0; ) { 939 paddr_t pa; 940 /* 941 * Get the physical address for this page. 942 */ 943 rv = pmap_extract(pmap, va, &pa); 944 #ifdef DIAGNOSTIC 945 if (!rv) 946 panic("_bus_dmamap_load: no page"); 947 #endif /* DIAGNOSTIC */ 948 949 /* 950 * Compute the segment size, and adjust counts. 951 */ 952 sgsize = pagesz - (va & (pagesz - 1)); 953 if (buflen < sgsize) 954 sgsize = buflen; 955 956 pmap_enter(pmap_kernel(), dva, 957 (pa & -pagesz) | PMAP_NC, 958 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 959 960 dva += pagesz; 961 va += sgsize; 962 buflen -= sgsize; 963 } 964 pmap_update(pmap_kernel()); 965 966 /* Make the map truly valid. */ 967 map->dm_nsegs = 1; 968 map->dm_mapsize = map->dm_segs[0].ds_len; 969 970 return (0); 971 } 972 973 /* 974 * unload a DMA map. 975 */ 976 void 977 _bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 978 { 979 bus_dma_segment_t *segs = map->dm_segs; 980 int nsegs = map->dm_nsegs; 981 int flags = map->_dm_flags; 982 bus_addr_t dva; 983 bus_size_t len; 984 int s, error; 985 986 if (nsegs != 1) 987 panic("_bus_dmamem_unload: nsegs = %d", nsegs); 988 989 /* 990 * _BUS_DMA_DIRECTMAP is set iff this map was loaded using 991 * _bus_dmamap_load for a 24-bit device. 992 */ 993 if ((flags & _BUS_DMA_DIRECTMAP) != 0) { 994 /* Nothing to release */ 995 map->_dm_flags &= ~_BUS_DMA_DIRECTMAP; 996 } 997 998 /* 999 * Otherwise, this map was loaded using _bus_dmamap_load for a 1000 * non-24-bit device, or using _bus_dmamap_load_raw. 1001 */ 1002 else { 1003 dva = segs[0]._ds_va & -PAGE_SIZE; 1004 len = segs[0]._ds_sgsize; 1005 1006 /* 1007 * Unmap the DVMA addresses. 1008 */ 1009 pmap_remove(pmap_kernel(), dva, dva + len); 1010 pmap_update(pmap_kernel()); 1011 1012 /* 1013 * Free the DVMA addresses. 1014 */ 1015 if ((flags & BUS_DMA_24BIT) != 0) { 1016 /* 1017 * This map was loaded using _bus_dmamap_load_raw 1018 * for a 24-bit device. 1019 */ 1020 uvm_unmap(kernel_map, dva, dva + len); 1021 } else { 1022 /* 1023 * This map was loaded using _bus_dmamap_load or 1024 * _bus_dmamap_load_raw for a non-24-bit device. 1025 */ 1026 s = splhigh(); 1027 error = extent_free(dvmamap, dva, len, EX_NOWAIT); 1028 splx(s); 1029 if (error != 0) 1030 printf("warning: %ld of DVMA space lost\n", len); 1031 } 1032 } 1033 1034 /* Mark the mappings as invalid. */ 1035 map->dm_mapsize = 0; 1036 map->dm_nsegs = 0; 1037 } 1038 1039 /* 1040 * Translate a VME address and address modifier 1041 * into a CPU physical address and page type. 1042 */ 1043 int 1044 vmebus_translate(vme_am_t mod, vme_addr_t addr, bus_type_t *btp, 1045 bus_addr_t *bap) 1046 { 1047 bus_addr_t base; 1048 1049 switch(mod) { 1050 #define _DS (VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA) 1051 1052 case (VME_AM_A16|_DS): 1053 base = 0x00ff0000; 1054 break; 1055 1056 case (VME_AM_A24|_DS): 1057 base = 0; 1058 break; 1059 1060 default: 1061 return (ENOENT); 1062 #undef _DS 1063 } 1064 1065 *bap = base | addr; 1066 *btp = (*bap & 0x800000 ? PMAP_VME8 : PMAP_VME0); 1067 return (0); 1068 } 1069 1070 /* 1071 * If we can find a mapping that was established by the PROM, use it. 1072 */ 1073 int 1074 find_prom_map(paddr_t pa, bus_type_t iospace, int len, vaddr_t *vap) 1075 { 1076 u_long pf; 1077 int pgtype; 1078 vaddr_t va, eva; 1079 int sme; 1080 u_long pte; 1081 int saved_ctx; 1082 1083 /* 1084 * The mapping must fit entirely within one page. 1085 */ 1086 if ((((u_long)pa & PGOFSET) + len) > PAGE_SIZE) 1087 return EINVAL; 1088 1089 pf = PA_PGNUM(pa); 1090 pgtype = iospace << PG_MOD_SHIFT; 1091 saved_ctx = kernel_context(); 1092 1093 /* 1094 * Walk the PROM address space, looking for a page with the 1095 * mapping we want. 1096 */ 1097 for (va = SUN_MONSTART; va < SUN_MONEND; ) { 1098 1099 /* 1100 * Make sure this segment is mapped. 1101 */ 1102 sme = get_segmap(va); 1103 if (sme == SEGINV) { 1104 va += NBSG; 1105 continue; /* next segment */ 1106 } 1107 1108 /* 1109 * Walk the pages of this segment. 1110 */ 1111 for(eva = va + NBSG; va < eva; va += PAGE_SIZE) { 1112 pte = get_pte(va); 1113 1114 if ((pte & (PG_VALID | PG_TYPE)) == 1115 (PG_VALID | pgtype) && 1116 PG_PFNUM(pte) == pf) 1117 { 1118 /* 1119 * Found the PROM mapping. 1120 * note: preserve page offset 1121 */ 1122 *vap = (va | ((vaddr_t)pa & PGOFSET)); 1123 restore_context(saved_ctx); 1124 return 0; 1125 } 1126 } 1127 } 1128 restore_context(saved_ctx); 1129 return ENOENT; 1130 } 1131 1132 int 1133 mm_md_physacc(paddr_t pa, vm_prot_t prot) 1134 { 1135 1136 /* Allow access only in "managed" RAM. */ 1137 if (pa < avail_start || pa >= avail_end) 1138 return EFAULT; 1139 return 0; 1140 } 1141 1142 bool 1143 mm_md_direct_mapped_phys(paddr_t paddr, vaddr_t *vaddr) 1144 { 1145 1146 if (paddr >= avail_start) 1147 return false; 1148 *vaddr = paddr; 1149 return true; 1150 } 1151 1152 /* 1153 * Allow access to the PROM mapping similiar to uvm_kernacc(). 1154 */ 1155 int 1156 mm_md_kernacc(void *ptr, vm_prot_t prot, bool *handled) 1157 { 1158 1159 if ((vaddr_t)ptr < SUN2_PROM_BASE || (vaddr_t)ptr > SUN2_MONEND) { 1160 *handled = false; 1161 return 0; 1162 } 1163 1164 *handled = true; 1165 /* Read in the PROM itself is OK, write not. */ 1166 if ((prot & VM_PROT_WRITE) == 0) 1167 return 0; 1168 return EFAULT; 1169 } 1170