1 /* $NetBSD: machdep.c,v 1.65 2010/02/08 19:02:32 joerg 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. All advertising materials mentioning features or use of this software 133 * must display the following acknowledgement: 134 * This product includes software developed by the University of 135 * California, Berkeley and its contributors. 136 * 4. Neither the name of the University nor the names of its contributors 137 * may be used to endorse or promote products derived from this software 138 * without specific prior written permission. 139 * 140 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 141 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 142 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 143 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 144 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 145 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 146 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 147 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 148 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 149 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 150 * SUCH DAMAGE. 151 * 152 * @(#)machdep.c 8.6 (Berkeley) 1/14/94 153 */ 154 155 #include <sys/cdefs.h> 156 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.65 2010/02/08 19:02:32 joerg Exp $"); 157 158 #include "opt_ddb.h" 159 #include "opt_kgdb.h" 160 #include "opt_fpu_emulate.h" 161 #include "opt_modular.h" 162 163 #include <sys/param.h> 164 #include <sys/systm.h> 165 #include <sys/kernel.h> 166 #include <sys/proc.h> 167 #include <sys/buf.h> 168 #include <sys/reboot.h> 169 #include <sys/conf.h> 170 #include <sys/file.h> 171 #include <sys/device.h> 172 #include <sys/malloc.h> 173 #include <sys/extent.h> 174 #include <sys/mbuf.h> 175 #include <sys/msgbuf.h> 176 #include <sys/ioctl.h> 177 #include <sys/tty.h> 178 #include <sys/mount.h> 179 #include <sys/exec.h> 180 #include <sys/exec_aout.h> /* for MID_* */ 181 #include <sys/core.h> 182 #include <sys/kcore.h> 183 #include <sys/vnode.h> 184 #include <sys/syscallargs.h> 185 #include <sys/ksyms.h> 186 #ifdef KGDB 187 #include <sys/kgdb.h> 188 #endif 189 190 #include <uvm/uvm.h> /* XXX: not _extern ... need vm_map_create */ 191 192 #include <sys/sysctl.h> 193 194 #include <dev/cons.h> 195 196 #include <machine/promlib.h> 197 #include <machine/cpu.h> 198 #include <machine/dvma.h> 199 #include <machine/idprom.h> 200 #include <machine/kcore.h> 201 #include <machine/reg.h> 202 #include <machine/psl.h> 203 #include <machine/pte.h> 204 #define _SUN68K_BUS_DMA_PRIVATE 205 #include <machine/autoconf.h> 206 #include <machine/bus.h> 207 #include <machine/intr.h> 208 #include <machine/pmap.h> 209 210 #if defined(DDB) 211 #include <machine/db_machdep.h> 212 #include <ddb/db_sym.h> 213 #include <ddb/db_extern.h> 214 #endif 215 216 #include <dev/vme/vmereg.h> 217 #include <dev/vme/vmevar.h> 218 219 #include <sun2/sun2/control.h> 220 #include <sun2/sun2/enable.h> 221 #include <sun2/sun2/machdep.h> 222 223 #include <sun68k/sun68k/vme_sun68k.h> 224 225 #include "ksyms.h" 226 227 /* Defined in locore.s */ 228 extern char kernel_text[]; 229 /* Defined by the linker */ 230 extern char etext[]; 231 /* Defined in vfs_bio.c */ 232 extern u_int bufpages; 233 234 /* Our exported CPU info; we can have only one. */ 235 struct cpu_info cpu_info_store; 236 237 struct vm_map *phys_map = NULL; 238 239 int physmem; 240 int fputype; 241 void * msgbufaddr; 242 243 /* Virtual page frame for /dev/mem (see mem.c) */ 244 vaddr_t vmmap; 245 246 /* 247 * safepri is a safe priority for sleep to set for a spin-wait 248 * during autoconfiguration or after a panic. 249 */ 250 int safepri = PSL_LOWIPL; 251 252 /* Soft copy of the enable register. */ 253 volatile u_short enable_reg_soft = ENABLE_REG_SOFT_UNDEF; 254 255 /* 256 * Our no-fault fault handler. 257 */ 258 label_t *nofault; 259 260 /* 261 * dvmamap is used to manage DVMA memory. 262 */ 263 static struct extent *dvmamap; 264 265 /* Our private scratch page for dumping the MMU. */ 266 static vaddr_t dumppage; 267 268 static void identifycpu(void); 269 static void initcpu(void); 270 271 /* 272 * cpu_startup: allocate memory for variable-sized tables, 273 * initialize CPU, and do autoconfiguration. 274 * 275 * This is called early in init_main.c:main(), after the 276 * kernel memory allocator is ready for use, but before 277 * the creation of processes 1,2, and mountroot, etc. 278 */ 279 void 280 cpu_startup(void) 281 { 282 void *v; 283 vaddr_t minaddr, maxaddr; 284 char pbuf[9]; 285 286 /* 287 * Initialize message buffer (for kernel printf). 288 * This is put in physical pages four through seven 289 * so it will always be in the same place after a 290 * reboot. (physical pages 0-3 are reserved by the PROM 291 * for its vector table and other stuff.) 292 * Its mapping was prepared in pmap_bootstrap(). 293 * Also, offset some to avoid PROM scribbles. 294 */ 295 v = (void *) (PAGE_SIZE * 4); 296 msgbufaddr = (void *)((char *)v + MSGBUFOFF); 297 initmsgbuf(msgbufaddr, MSGBUFSIZE); 298 299 #if NKSYMS || defined(DDB) || defined(MODULAR) 300 { 301 extern int nsym; 302 extern char *ssym, *esym; 303 304 ksyms_addsyms_elf(nsym, ssym, esym); 305 } 306 #endif /* DDB */ 307 308 /* 309 * Good {morning,afternoon,evening,night}. 310 */ 311 printf("%s%s", copyright, version); 312 identifycpu(); 313 fputype = FPU_NONE; 314 #ifdef FPU_EMULATE 315 printf("fpu: emulator\n"); 316 #else 317 printf("fpu: no math support\n"); 318 #endif 319 320 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 321 printf("total memory = %s\n", pbuf); 322 323 /* 324 * XXX fredette - we force a small number of buffers 325 * to help me debug this on my low-memory machine. 326 * this should go away at some point, allowing the 327 * normal automatic buffer-sizing to happen. 328 */ 329 bufpages = 37; 330 331 /* 332 * Get scratch page for dumpsys(). 333 */ 334 if ((dumppage = uvm_km_alloc(kernel_map, PAGE_SIZE,0, UVM_KMF_WIRED)) 335 == 0) 336 panic("startup: alloc dumppage"); 337 338 339 minaddr = 0; 340 341 /* 342 * Allocate a submap for physio 343 */ 344 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 345 VM_PHYS_SIZE, 0, false, NULL); 346 347 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 348 printf("avail memory = %s\n", pbuf); 349 350 /* 351 * Allocate a virtual page (for use by /dev/mem) 352 * This page is handed to pmap_enter() therefore 353 * it has to be in the normal kernel VA range. 354 */ 355 vmmap = uvm_km_alloc(kernel_map, PAGE_SIZE, 0, 356 UVM_KMF_VAONLY | UVM_KMF_WAITVA); 357 358 /* 359 * Allocate DMA map for devices on the bus. 360 */ 361 dvmamap = extent_create("dvmamap", 362 DVMA_MAP_BASE, DVMA_MAP_BASE + DVMA_MAP_AVAIL, 363 M_DEVBUF, 0, 0, EX_NOWAIT); 364 if (dvmamap == NULL) 365 panic("unable to allocate DVMA map"); 366 367 /* 368 * Set up CPU-specific registers, cache, etc. 369 */ 370 initcpu(); 371 } 372 373 /* 374 * Set registers on exec. 375 */ 376 void 377 setregs(struct lwp *l, struct exec_package *pack, vaddr_t stack) 378 { 379 struct trapframe *tf = (struct trapframe *)l->l_md.md_regs; 380 struct pcb *pcb = lwp_getpcb(l); 381 382 tf->tf_sr = PSL_USERSET; 383 tf->tf_pc = pack->ep_entry & ~1; 384 tf->tf_regs[D0] = 0; 385 tf->tf_regs[D1] = 0; 386 tf->tf_regs[D2] = 0; 387 tf->tf_regs[D3] = 0; 388 tf->tf_regs[D4] = 0; 389 tf->tf_regs[D5] = 0; 390 tf->tf_regs[D6] = 0; 391 tf->tf_regs[D7] = 0; 392 tf->tf_regs[A0] = 0; 393 tf->tf_regs[A1] = 0; 394 tf->tf_regs[A2] = (int)l->l_proc->p_psstr; 395 tf->tf_regs[A3] = 0; 396 tf->tf_regs[A4] = 0; 397 tf->tf_regs[A5] = 0; 398 tf->tf_regs[A6] = 0; 399 tf->tf_regs[SP] = stack; 400 401 /* restore a null state frame */ 402 pcb->pcb_fpregs.fpf_null = 0; 403 404 l->l_md.md_flags = 0; 405 } 406 407 /* 408 * Info for CTL_HW 409 */ 410 char machine[16] = MACHINE; /* from <machine/param.h> */ 411 char kernel_arch[16] = "sun2"; /* XXX needs a sysctl node */ 412 char cpu_model[120]; 413 414 /* 415 * Determine which Sun2 model we are running on. 416 */ 417 void 418 identifycpu(void) 419 { 420 extern char *cpu_string; /* XXX */ 421 422 /* Other stuff? (VAC, mc6888x version, etc.) */ 423 /* Note: miniroot cares about the kernel_arch part. */ 424 sprintf(cpu_model, "%s %s", kernel_arch, cpu_string); 425 426 printf("Model: %s\n", cpu_model); 427 } 428 429 /* 430 * machine dependent system variables. 431 */ 432 #if 0 /* XXX - Not yet... */ 433 static int 434 sysctl_machdep_root_device(SYSCTLFN_ARGS) 435 { 436 struct sysctlnode node = *rnode; 437 438 node.sysctl_data = some permutation on root_device; 439 node.sysctl_size = strlen(root_device) + 1; 440 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 441 } 442 #endif 443 444 static int 445 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 446 { 447 struct sysctlnode node = *rnode; 448 char *cp; 449 450 cp = prom_getbootfile(); 451 if (cp == NULL || cp[0] == '\0') 452 return (ENOENT); 453 454 node.sysctl_data = cp; 455 node.sysctl_size = strlen(cp) + 1; 456 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 457 } 458 459 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 460 { 461 462 sysctl_createv(clog, 0, NULL, NULL, 463 CTLFLAG_PERMANENT, 464 CTLTYPE_NODE, "machdep", NULL, 465 NULL, 0, NULL, 0, 466 CTL_MACHDEP, CTL_EOL); 467 468 sysctl_createv(clog, 0, NULL, NULL, 469 CTLFLAG_PERMANENT, 470 CTLTYPE_STRUCT, "console_device", NULL, 471 sysctl_consdev, 0, NULL, sizeof(dev_t), 472 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 473 #if 0 /* XXX - Not yet... */ 474 sysctl_createv(clog, 0, NULL, NULL, 475 CTLFLAG_PERMANENT, 476 CTLTYPE_STRING, "root_device", NULL, 477 sysctl_machdep_root_device, 0, NULL, 0, 478 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 479 #endif 480 sysctl_createv(clog, 0, NULL, NULL, 481 CTLFLAG_PERMANENT, 482 CTLTYPE_STRING, "booted_kernel", NULL, 483 sysctl_machdep_booted_kernel, 0, NULL, 0, 484 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 485 } 486 487 /* See: sig_machdep.c */ 488 489 /* 490 * Do a sync in preparation for a reboot. 491 * XXX - This could probably be common code. 492 * XXX - And now, most of it is in vfs_shutdown() 493 * XXX - Put waittime checks in there too? 494 */ 495 int waittime = -1; /* XXX - Who else looks at this? -gwr */ 496 static void 497 reboot_sync(void) 498 { 499 500 /* Check waittime here to localize its use to this function. */ 501 if (waittime >= 0) 502 return; 503 waittime = 0; 504 vfs_shutdown(); 505 } 506 507 /* 508 * Common part of the BSD and SunOS reboot system calls. 509 */ 510 __dead void 511 cpu_reboot(int howto, char *user_boot_string) 512 { 513 char *bs, *p; 514 char default_boot_string[8]; 515 516 /* If system is cold, just halt. (early panic?) */ 517 if (cold) 518 goto haltsys; 519 520 /* Un-blank the screen if appropriate. */ 521 cnpollc(1); 522 523 if ((howto & RB_NOSYNC) == 0) { 524 reboot_sync(); 525 /* 526 * If we've been adjusting the clock, the todr 527 * will be out of synch; adjust it now. 528 * 529 * XXX - However, if the kernel has been sitting in ddb, 530 * the time will be way off, so don't set the HW clock! 531 * XXX - Should do sanity check against HW clock. -gwr 532 */ 533 /* resettodr(); */ 534 } 535 536 /* Disable interrupts. */ 537 splhigh(); 538 539 /* Write out a crash dump if asked. */ 540 if (howto & RB_DUMP) 541 dumpsys(); 542 543 /* run any shutdown hooks */ 544 doshutdownhooks(); 545 546 pmf_system_shutdown(boothowto); 547 548 if (howto & RB_HALT) { 549 haltsys: 550 printf("halted.\n"); 551 prom_halt(); 552 } 553 554 /* 555 * Automatic reboot. 556 */ 557 bs = user_boot_string; 558 if (bs == NULL) { 559 /* 560 * Build our own boot string with an empty 561 * boot device/file and (maybe) some flags. 562 * The PROM will supply the device/file name. 563 */ 564 bs = default_boot_string; 565 *bs = '\0'; 566 if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) { 567 /* Append the boot flags. */ 568 p = bs; 569 *p++ = ' '; 570 *p++ = '-'; 571 if (howto & RB_KDB) 572 *p++ = 'd'; 573 if (howto & RB_ASKNAME) 574 *p++ = 'a'; 575 if (howto & RB_SINGLE) 576 *p++ = 's'; 577 *p = '\0'; 578 } 579 } 580 printf("rebooting...\n"); 581 prom_boot(bs); 582 for (;;) ; 583 /*NOTREACHED*/ 584 } 585 586 /* 587 * These variables are needed by /sbin/savecore 588 */ 589 uint32_t dumpmag = 0x8fca0101; /* magic number */ 590 int dumpsize = 0; /* pages */ 591 long dumplo = 0; /* blocks */ 592 593 #define DUMP_EXTRA 3 /* CPU-dependent extra pages */ 594 595 /* 596 * This is called by main to set dumplo, dumpsize. 597 * Dumps always skip the first PAGE_SIZE of disk space 598 * in case there might be a disk label stored there. 599 * If there is extra space, put dump at the end to 600 * reduce the chance that swapping trashes it. 601 */ 602 void 603 cpu_dumpconf(void) 604 { 605 const struct bdevsw *bdev; 606 int devblks; /* size of dump device in blocks */ 607 int dumpblks; /* size of dump image in blocks */ 608 int (*getsize)(dev_t); 609 610 if (dumpdev == NODEV) 611 return; 612 613 bdev = bdevsw_lookup(dumpdev); 614 if (bdev == NULL) { 615 dumpdev = NODEV; 616 return; 617 } 618 getsize = bdev->d_psize; 619 if (getsize == NULL) 620 return; 621 devblks = (*getsize)(dumpdev); 622 if (devblks <= ctod(1)) 623 return; 624 devblks &= ~(ctod(1)-1); 625 626 /* 627 * Note: savecore expects dumpsize to be the 628 * number of pages AFTER the dump header. 629 */ 630 dumpsize = physmem; 631 632 /* Position dump image near end of space, page aligned. */ 633 dumpblks = ctod(physmem + DUMP_EXTRA); 634 dumplo = devblks - dumpblks; 635 636 /* If it does not fit, truncate it by moving dumplo. */ 637 /* Note: Must force signed comparison. */ 638 if (dumplo < ((long)ctod(1))) { 639 dumplo = ctod(1); 640 dumpsize = dtoc(devblks - dumplo) - DUMP_EXTRA; 641 } 642 } 643 644 /* Note: gdb looks for "dumppcb" in a kernel crash dump. */ 645 struct pcb dumppcb; 646 extern paddr_t avail_start; 647 648 /* 649 * Write a crash dump. The format while in swap is: 650 * kcore_seg_t cpu_hdr; 651 * cpu_kcore_hdr_t cpu_data; 652 * padding (PAGE_SIZE-sizeof(kcore_seg_t)) 653 * pagemap (2*PAGE_SIZE) 654 * physical memory... 655 */ 656 void 657 dumpsys(void) 658 { 659 const struct bdevsw *dsw; 660 kcore_seg_t *kseg_p; 661 cpu_kcore_hdr_t *chdr_p; 662 struct sun2_kcore_hdr *sh; 663 char *vaddr; 664 paddr_t paddr; 665 int psize, todo, chunk; 666 daddr_t blkno; 667 int error = 0; 668 669 if (dumpdev == NODEV) 670 return; 671 dsw = bdevsw_lookup(dumpdev); 672 if (dsw == NULL || dsw->d_psize == NULL) 673 return; 674 if (dumppage == 0) 675 return; 676 677 /* 678 * For dumps during autoconfiguration, 679 * if dump device has already configured... 680 */ 681 if (dumpsize == 0) 682 cpu_dumpconf(); 683 if (dumplo <= 0) { 684 printf("\ndump to dev %u,%u not possible\n", 685 major(dumpdev), minor(dumpdev)); 686 return; 687 } 688 savectx(&dumppcb); 689 690 psize = (*(dsw->d_psize))(dumpdev); 691 if (psize == -1) { 692 printf("dump area unavailable\n"); 693 return; 694 } 695 696 printf("\ndumping to dev %u,%u offset %ld\n", 697 major(dumpdev), minor(dumpdev), dumplo); 698 699 /* 700 * Prepare the dump header, including MMU state. 701 */ 702 blkno = dumplo; 703 todo = dumpsize; /* pages */ 704 vaddr = (char*)dumppage; 705 memset(vaddr, 0, PAGE_SIZE); 706 707 /* Set pointers to all three parts. */ 708 kseg_p = (kcore_seg_t *)vaddr; 709 chdr_p = (cpu_kcore_hdr_t *) (kseg_p + 1); 710 sh = &chdr_p->un._sun2; 711 712 /* Fill in kcore_seg_t part. */ 713 CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 714 kseg_p->c_size = (ctob(DUMP_EXTRA) - sizeof(*kseg_p)); 715 716 /* Fill in cpu_kcore_hdr_t part. */ 717 strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name)); 718 chdr_p->page_size = PAGE_SIZE; 719 chdr_p->kernbase = KERNBASE; 720 721 /* Fill in the sun2_kcore_hdr part (MMU state). */ 722 pmap_kcore_hdr(sh); 723 724 /* Write out the dump header. */ 725 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 726 if (error) 727 goto fail; 728 blkno += btodb(PAGE_SIZE); 729 730 /* translation RAM (pages zero through seven) */ 731 for(chunk = 0; chunk < (PAGE_SIZE * 8); chunk += PAGE_SIZE) { 732 pmap_get_pagemap((int*)vaddr, chunk); 733 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 734 if (error) 735 goto fail; 736 blkno += btodb(PAGE_SIZE); 737 } 738 739 /* 740 * Now dump physical memory. Have to do it in two chunks. 741 * The first chunk is "unmanaged" (by the VM code) and its 742 * range of physical addresses is not allow in pmap_enter. 743 * However, that segment is mapped linearly, so we can just 744 * use the virtual mappings already in place. The second 745 * chunk is done the normal way, using pmap_enter. 746 * 747 * Note that vaddr==(paddr+KERNBASE) for paddr=0 through etext. 748 */ 749 750 /* Do the first chunk (0 <= PA < avail_start) */ 751 paddr = 0; 752 chunk = btoc(avail_start); 753 if (chunk > todo) 754 chunk = todo; 755 do { 756 if ((todo & 0xf) == 0) 757 printf_nolog("\r%4d", todo); 758 vaddr = (char*)(paddr + KERNBASE); 759 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 760 if (error) 761 goto fail; 762 paddr += PAGE_SIZE; 763 blkno += btodb(PAGE_SIZE); 764 --todo; 765 } while (--chunk > 0); 766 767 /* Do the second chunk (avail_start <= PA < dumpsize) */ 768 vaddr = (char*)vmmap; /* Borrow /dev/mem VA */ 769 do { 770 if ((todo & 0xf) == 0) 771 printf_nolog("\r%4d", todo); 772 pmap_kenter_pa(vmmap, paddr | PMAP_NC, VM_PROT_READ, 0); 773 pmap_update(pmap_kernel()); 774 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 775 pmap_kremove(vmmap, PAGE_SIZE); 776 pmap_update(pmap_kernel()); 777 if (error) 778 goto fail; 779 paddr += PAGE_SIZE; 780 blkno += btodb(PAGE_SIZE); 781 } while (--todo > 0); 782 783 printf("\rdump succeeded\n"); 784 return; 785 fail: 786 printf(" dump error=%d\n", error); 787 } 788 789 static void 790 initcpu(void) 791 { 792 /* XXX: Enable RAM parity/ECC checking? */ 793 /* XXX: parityenable(); */ 794 795 } 796 797 /* straptrap() in trap.c */ 798 799 /* from hp300: badaddr() */ 800 801 /* XXX: parityenable() ? */ 802 /* regdump() moved to regdump.c */ 803 804 /* 805 * cpu_exec_aout_makecmds(): 806 * CPU-dependent a.out format hook for execve(). 807 * 808 * Determine if the given exec package refers to something which we 809 * understand and, if so, set up the vmcmds for it. 810 */ 811 int 812 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp) 813 { 814 return ENOEXEC; 815 } 816 817 #if 0 818 /* 819 * Soft interrupt support. 820 */ 821 void 822 isr_soft_request(int level) 823 { 824 u_char bit; 825 826 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 827 return; 828 829 bit = 1 << level; 830 enable_reg_or(bit); 831 } 832 833 void 834 isr_soft_clear(int level) 835 { 836 u_char bit; 837 838 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 839 return; 840 841 bit = 1 << level; 842 enable_reg_and(~bit); 843 } 844 #endif 845 846 /* 847 * Like _bus_dmamap_load(), but for raw memory allocated with 848 * bus_dmamem_alloc(). 849 */ 850 int 851 _bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, 852 int nsegs, bus_size_t size, int flags) 853 { 854 struct vm_page *m; 855 paddr_t pa; 856 bus_addr_t dva; 857 bus_size_t sgsize; 858 struct pglist *mlist; 859 int pagesz = PAGE_SIZE; 860 int error; 861 862 /* 863 * Make sure that on error condition we return "no valid mappings". 864 */ 865 map->dm_nsegs = 0; 866 map->dm_mapsize = 0; 867 868 /* Allocate DVMA addresses */ 869 sgsize = (size + pagesz - 1) & -pagesz; 870 871 /* 872 * If the device can see our entire 24-bit address space, 873 * we can use any properly aligned virtual addresses. 874 */ 875 if ((map->_dm_flags & BUS_DMA_24BIT) != 0) { 876 dva = _bus_dma_valloc_skewed(sgsize, map->_dm_boundary, 877 pagesz, 0); 878 if (dva == 0) 879 return (ENOMEM); 880 } 881 882 /* 883 * Otherwise, we need virtual addresses in DVMA space. 884 */ 885 else { 886 error = extent_alloc(dvmamap, sgsize, pagesz, 887 map->_dm_boundary, 888 (flags & BUS_DMA_NOWAIT) == 0 889 ? EX_WAITOK : EX_NOWAIT, 890 (u_long *)&dva); 891 if (error) 892 return (error); 893 } 894 895 /* Fill in the segment. */ 896 map->dm_segs[0].ds_addr = dva; 897 map->dm_segs[0].ds_len = size; 898 map->dm_segs[0]._ds_va = dva; 899 map->dm_segs[0]._ds_sgsize = sgsize; 900 901 /* Map physical pages into MMU */ 902 mlist = segs[0]._ds_mlist; 903 for (m = TAILQ_FIRST(mlist); m != NULL; m = TAILQ_NEXT(m,pageq.queue)) { 904 if (sgsize == 0) 905 panic("_bus_dmamap_load_raw: size botch"); 906 pa = VM_PAGE_TO_PHYS(m); 907 pmap_enter(pmap_kernel(), dva, 908 (pa & -pagesz) | PMAP_NC, 909 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 910 911 dva += pagesz; 912 sgsize -= pagesz; 913 } 914 pmap_update(pmap_kernel()); 915 916 /* Make the map truly valid. */ 917 map->dm_nsegs = 1; 918 map->dm_mapsize = size; 919 920 return (0); 921 } 922 923 /* 924 * load DMA map with a linear buffer. 925 */ 926 int 927 _bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 928 bus_size_t buflen, struct proc *p, int flags) 929 { 930 bus_size_t sgsize; 931 vaddr_t va = (vaddr_t)buf; 932 int pagesz = PAGE_SIZE; 933 bus_addr_t dva; 934 pmap_t pmap; 935 int rv; 936 937 /* 938 * Make sure that on error condition we return "no valid mappings". 939 */ 940 map->dm_nsegs = 0; 941 map->dm_mapsize = 0; 942 943 if (buflen > map->_dm_size) 944 return (EINVAL); 945 946 /* 947 * A 24-bit device can see all of our kernel address space, so 948 * if we have KVAs, we can just load them as-is, no mapping 949 * necessary. 950 */ 951 if ((map->_dm_flags & BUS_DMA_24BIT) != 0 && p == NULL) { 952 /* 953 * XXX Need to implement "don't DMA across this boundry". 954 */ 955 if (map->_dm_boundary != 0) 956 panic("bus_dmamap_load: boundaries not implemented"); 957 map->dm_mapsize = buflen; 958 map->dm_nsegs = 1; 959 map->dm_segs[0].ds_addr = (bus_addr_t)va; 960 map->dm_segs[0].ds_len = buflen; 961 map->_dm_flags |= _BUS_DMA_DIRECTMAP; 962 return (0); 963 } 964 965 /* 966 * Allocate a region in DVMA space. 967 */ 968 sgsize = m68k_round_page(buflen + (va & (pagesz - 1))); 969 970 if (extent_alloc(dvmamap, sgsize, pagesz, map->_dm_boundary, 971 (flags & BUS_DMA_NOWAIT) == 0 ? EX_WAITOK : EX_NOWAIT, 972 (u_long *)&dva) != 0) { 973 return (ENOMEM); 974 } 975 976 /* Fill in the segment. */ 977 map->dm_segs[0].ds_addr = dva + (va & (pagesz - 1)); 978 map->dm_segs[0].ds_len = buflen; 979 map->dm_segs[0]._ds_va = dva; 980 map->dm_segs[0]._ds_sgsize = sgsize; 981 982 /* 983 * Now map the DVMA addresses we allocated to point to the 984 * pages of the caller's buffer. 985 */ 986 if (p != NULL) 987 pmap = p->p_vmspace->vm_map.pmap; 988 else 989 pmap = pmap_kernel(); 990 991 for (; buflen > 0; ) { 992 paddr_t pa; 993 /* 994 * Get the physical address for this page. 995 */ 996 rv = pmap_extract(pmap, va, &pa); 997 #ifdef DIAGNOSTIC 998 if (!rv) 999 panic("_bus_dmamap_load: no page"); 1000 #endif /* DIAGNOSTIC */ 1001 1002 /* 1003 * Compute the segment size, and adjust counts. 1004 */ 1005 sgsize = pagesz - (va & (pagesz - 1)); 1006 if (buflen < sgsize) 1007 sgsize = buflen; 1008 1009 pmap_enter(pmap_kernel(), dva, 1010 (pa & -pagesz) | PMAP_NC, 1011 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 1012 1013 dva += pagesz; 1014 va += sgsize; 1015 buflen -= sgsize; 1016 } 1017 pmap_update(pmap_kernel()); 1018 1019 /* Make the map truly valid. */ 1020 map->dm_nsegs = 1; 1021 map->dm_mapsize = map->dm_segs[0].ds_len; 1022 1023 return (0); 1024 } 1025 1026 /* 1027 * unload a DMA map. 1028 */ 1029 void 1030 _bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 1031 { 1032 bus_dma_segment_t *segs = map->dm_segs; 1033 int nsegs = map->dm_nsegs; 1034 int flags = map->_dm_flags; 1035 bus_addr_t dva; 1036 bus_size_t len; 1037 int s, error; 1038 1039 if (nsegs != 1) 1040 panic("_bus_dmamem_unload: nsegs = %d", nsegs); 1041 1042 /* 1043 * _BUS_DMA_DIRECTMAP is set iff this map was loaded using 1044 * _bus_dmamap_load for a 24-bit device. 1045 */ 1046 if ((flags & _BUS_DMA_DIRECTMAP) != 0) { 1047 /* Nothing to release */ 1048 map->_dm_flags &= ~_BUS_DMA_DIRECTMAP; 1049 } 1050 1051 /* 1052 * Otherwise, this map was loaded using _bus_dmamap_load for a 1053 * non-24-bit device, or using _bus_dmamap_load_raw. 1054 */ 1055 else { 1056 dva = segs[0]._ds_va & -PAGE_SIZE; 1057 len = segs[0]._ds_sgsize; 1058 1059 /* 1060 * Unmap the DVMA addresses. 1061 */ 1062 pmap_remove(pmap_kernel(), dva, dva + len); 1063 pmap_update(pmap_kernel()); 1064 1065 /* 1066 * Free the DVMA addresses. 1067 */ 1068 if ((flags & BUS_DMA_24BIT) != 0) { 1069 /* 1070 * This map was loaded using _bus_dmamap_load_raw 1071 * for a 24-bit device. 1072 */ 1073 uvm_unmap(kernel_map, dva, dva + len); 1074 } else { 1075 /* 1076 * This map was loaded using _bus_dmamap_load or 1077 * _bus_dmamap_load_raw for a non-24-bit device. 1078 */ 1079 s = splhigh(); 1080 error = extent_free(dvmamap, dva, len, EX_NOWAIT); 1081 splx(s); 1082 if (error != 0) 1083 printf("warning: %ld of DVMA space lost\n", len); 1084 } 1085 } 1086 1087 /* Mark the mappings as invalid. */ 1088 map->dm_mapsize = 0; 1089 map->dm_nsegs = 0; 1090 } 1091 1092 /* 1093 * Translate a VME address and address modifier 1094 * into a CPU physical address and page type. 1095 */ 1096 int 1097 vmebus_translate(vme_am_t mod, vme_addr_t addr, bus_type_t *btp, 1098 bus_addr_t *bap) 1099 { 1100 bus_addr_t base; 1101 1102 switch(mod) { 1103 #define _DS (VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA) 1104 1105 case (VME_AM_A16|_DS): 1106 base = 0x00ff0000; 1107 break; 1108 1109 case (VME_AM_A24|_DS): 1110 base = 0; 1111 break; 1112 1113 default: 1114 return (ENOENT); 1115 #undef _DS 1116 } 1117 1118 *bap = base | addr; 1119 *btp = (*bap & 0x800000 ? PMAP_VME8 : PMAP_VME0); 1120 return (0); 1121 } 1122 1123 /* 1124 * If we can find a mapping that was established by the PROM, use it. 1125 */ 1126 int 1127 find_prom_map(paddr_t pa, bus_type_t iospace, int len, vaddr_t *vap) 1128 { 1129 u_long pf; 1130 int pgtype; 1131 vaddr_t va, eva; 1132 int sme; 1133 u_long pte; 1134 int saved_ctx; 1135 1136 /* 1137 * The mapping must fit entirely within one page. 1138 */ 1139 if ((((u_long)pa & PGOFSET) + len) > PAGE_SIZE) 1140 return EINVAL; 1141 1142 pf = PA_PGNUM(pa); 1143 pgtype = iospace << PG_MOD_SHIFT; 1144 saved_ctx = kernel_context(); 1145 1146 /* 1147 * Walk the PROM address space, looking for a page with the 1148 * mapping we want. 1149 */ 1150 for (va = SUN_MONSTART; va < SUN_MONEND; ) { 1151 1152 /* 1153 * Make sure this segment is mapped. 1154 */ 1155 sme = get_segmap(va); 1156 if (sme == SEGINV) { 1157 va += NBSG; 1158 continue; /* next segment */ 1159 } 1160 1161 /* 1162 * Walk the pages of this segment. 1163 */ 1164 for(eva = va + NBSG; va < eva; va += PAGE_SIZE) { 1165 pte = get_pte(va); 1166 1167 if ((pte & (PG_VALID | PG_TYPE)) == 1168 (PG_VALID | pgtype) && 1169 PG_PFNUM(pte) == pf) 1170 { 1171 /* 1172 * Found the PROM mapping. 1173 * note: preserve page offset 1174 */ 1175 *vap = (va | ((vaddr_t)pa & PGOFSET)); 1176 restore_context(saved_ctx); 1177 return 0; 1178 } 1179 } 1180 } 1181 restore_context(saved_ctx); 1182 return ENOENT; 1183 } 1184