1 /* $NetBSD: machdep.c,v 1.66 2011/01/17 14:36:33 tsutsui 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 1.66 2011/01/17 14:36:33 tsutsui 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/pcb.h> 203 #include <machine/psl.h> 204 #include <machine/pte.h> 205 #define _SUN68K_BUS_DMA_PRIVATE 206 #include <machine/autoconf.h> 207 #include <machine/bus.h> 208 #include <machine/intr.h> 209 #include <machine/pmap.h> 210 211 #if defined(DDB) 212 #include <machine/db_machdep.h> 213 #include <ddb/db_sym.h> 214 #include <ddb/db_extern.h> 215 #endif 216 217 #include <dev/vme/vmereg.h> 218 #include <dev/vme/vmevar.h> 219 220 #include <sun2/sun2/control.h> 221 #include <sun2/sun2/enable.h> 222 #include <sun2/sun2/machdep.h> 223 224 #include <sun68k/sun68k/vme_sun68k.h> 225 226 #include "ksyms.h" 227 228 /* Defined in locore.s */ 229 extern char kernel_text[]; 230 /* Defined by the linker */ 231 extern char etext[]; 232 /* Defined in vfs_bio.c */ 233 extern u_int bufpages; 234 235 /* Our exported CPU info; we can have only one. */ 236 struct cpu_info cpu_info_store; 237 238 struct vm_map *phys_map = NULL; 239 240 int physmem; 241 int fputype; 242 void * msgbufaddr; 243 244 /* Virtual page frame for /dev/mem (see mem.c) */ 245 vaddr_t vmmap; 246 247 /* 248 * safepri is a safe priority for sleep to set for a spin-wait 249 * during autoconfiguration or after a panic. 250 */ 251 int safepri = PSL_LOWIPL; 252 253 /* Soft copy of the enable register. */ 254 volatile u_short enable_reg_soft = ENABLE_REG_SOFT_UNDEF; 255 256 /* 257 * Our no-fault fault handler. 258 */ 259 label_t *nofault; 260 261 /* 262 * dvmamap is used to manage DVMA memory. 263 */ 264 static struct extent *dvmamap; 265 266 /* Our private scratch page for dumping the MMU. */ 267 static vaddr_t dumppage; 268 269 static void identifycpu(void); 270 static void initcpu(void); 271 272 /* 273 * cpu_startup: allocate memory for variable-sized tables, 274 * initialize CPU, and do autoconfiguration. 275 * 276 * This is called early in init_main.c:main(), after the 277 * kernel memory allocator is ready for use, but before 278 * the creation of processes 1,2, and mountroot, etc. 279 */ 280 void 281 cpu_startup(void) 282 { 283 void *v; 284 vaddr_t minaddr, maxaddr; 285 char pbuf[9]; 286 287 /* 288 * Initialize message buffer (for kernel printf). 289 * This is put in physical pages four through seven 290 * so it will always be in the same place after a 291 * reboot. (physical pages 0-3 are reserved by the PROM 292 * for its vector table and other stuff.) 293 * Its mapping was prepared in pmap_bootstrap(). 294 * Also, offset some to avoid PROM scribbles. 295 */ 296 v = (void *) (PAGE_SIZE * 4); 297 msgbufaddr = (void *)((char *)v + MSGBUFOFF); 298 initmsgbuf(msgbufaddr, MSGBUFSIZE); 299 300 #if NKSYMS || defined(DDB) || defined(MODULAR) 301 { 302 extern int nsym; 303 extern char *ssym, *esym; 304 305 ksyms_addsyms_elf(nsym, ssym, esym); 306 } 307 #endif /* DDB */ 308 309 /* 310 * Good {morning,afternoon,evening,night}. 311 */ 312 printf("%s%s", copyright, version); 313 identifycpu(); 314 fputype = FPU_NONE; 315 #ifdef FPU_EMULATE 316 printf("fpu: emulator\n"); 317 #else 318 printf("fpu: no math support\n"); 319 #endif 320 321 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 322 printf("total memory = %s\n", pbuf); 323 324 /* 325 * XXX fredette - we force a small number of buffers 326 * to help me debug this on my low-memory machine. 327 * this should go away at some point, allowing the 328 * normal automatic buffer-sizing to happen. 329 */ 330 bufpages = 37; 331 332 /* 333 * Get scratch page for dumpsys(). 334 */ 335 if ((dumppage = uvm_km_alloc(kernel_map, PAGE_SIZE,0, UVM_KMF_WIRED)) 336 == 0) 337 panic("startup: alloc dumppage"); 338 339 340 minaddr = 0; 341 342 /* 343 * Allocate a submap for physio 344 */ 345 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 346 VM_PHYS_SIZE, 0, false, NULL); 347 348 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 349 printf("avail memory = %s\n", pbuf); 350 351 /* 352 * Allocate a virtual page (for use by /dev/mem) 353 * This page is handed to pmap_enter() therefore 354 * it has to be in the normal kernel VA range. 355 */ 356 vmmap = uvm_km_alloc(kernel_map, PAGE_SIZE, 0, 357 UVM_KMF_VAONLY | UVM_KMF_WAITVA); 358 359 /* 360 * Allocate DMA map for devices on the bus. 361 */ 362 dvmamap = extent_create("dvmamap", 363 DVMA_MAP_BASE, DVMA_MAP_BASE + DVMA_MAP_AVAIL, 364 M_DEVBUF, 0, 0, EX_NOWAIT); 365 if (dvmamap == NULL) 366 panic("unable to allocate DVMA map"); 367 368 /* 369 * Set up CPU-specific registers, cache, etc. 370 */ 371 initcpu(); 372 } 373 374 /* 375 * Set registers on exec. 376 */ 377 void 378 setregs(struct lwp *l, struct exec_package *pack, vaddr_t stack) 379 { 380 struct trapframe *tf = (struct trapframe *)l->l_md.md_regs; 381 struct pcb *pcb = lwp_getpcb(l); 382 383 tf->tf_sr = PSL_USERSET; 384 tf->tf_pc = pack->ep_entry & ~1; 385 tf->tf_regs[D0] = 0; 386 tf->tf_regs[D1] = 0; 387 tf->tf_regs[D2] = 0; 388 tf->tf_regs[D3] = 0; 389 tf->tf_regs[D4] = 0; 390 tf->tf_regs[D5] = 0; 391 tf->tf_regs[D6] = 0; 392 tf->tf_regs[D7] = 0; 393 tf->tf_regs[A0] = 0; 394 tf->tf_regs[A1] = 0; 395 tf->tf_regs[A2] = (int)l->l_proc->p_psstr; 396 tf->tf_regs[A3] = 0; 397 tf->tf_regs[A4] = 0; 398 tf->tf_regs[A5] = 0; 399 tf->tf_regs[A6] = 0; 400 tf->tf_regs[SP] = stack; 401 402 /* restore a null state frame */ 403 pcb->pcb_fpregs.fpf_null = 0; 404 405 l->l_md.md_flags = 0; 406 } 407 408 /* 409 * Info for CTL_HW 410 */ 411 char machine[16] = MACHINE; /* from <machine/param.h> */ 412 char kernel_arch[16] = "sun2"; /* XXX needs a sysctl node */ 413 char cpu_model[120]; 414 415 /* 416 * Determine which Sun2 model we are running on. 417 */ 418 void 419 identifycpu(void) 420 { 421 extern char *cpu_string; /* XXX */ 422 423 /* Other stuff? (VAC, mc6888x version, etc.) */ 424 /* Note: miniroot cares about the kernel_arch part. */ 425 sprintf(cpu_model, "%s %s", kernel_arch, cpu_string); 426 427 printf("Model: %s\n", cpu_model); 428 } 429 430 /* 431 * machine dependent system variables. 432 */ 433 #if 0 /* XXX - Not yet... */ 434 static int 435 sysctl_machdep_root_device(SYSCTLFN_ARGS) 436 { 437 struct sysctlnode node = *rnode; 438 439 node.sysctl_data = some permutation on root_device; 440 node.sysctl_size = strlen(root_device) + 1; 441 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 442 } 443 #endif 444 445 static int 446 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 447 { 448 struct sysctlnode node = *rnode; 449 char *cp; 450 451 cp = prom_getbootfile(); 452 if (cp == NULL || cp[0] == '\0') 453 return (ENOENT); 454 455 node.sysctl_data = cp; 456 node.sysctl_size = strlen(cp) + 1; 457 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 458 } 459 460 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 461 { 462 463 sysctl_createv(clog, 0, NULL, NULL, 464 CTLFLAG_PERMANENT, 465 CTLTYPE_NODE, "machdep", NULL, 466 NULL, 0, NULL, 0, 467 CTL_MACHDEP, CTL_EOL); 468 469 sysctl_createv(clog, 0, NULL, NULL, 470 CTLFLAG_PERMANENT, 471 CTLTYPE_STRUCT, "console_device", NULL, 472 sysctl_consdev, 0, NULL, sizeof(dev_t), 473 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 474 #if 0 /* XXX - Not yet... */ 475 sysctl_createv(clog, 0, NULL, NULL, 476 CTLFLAG_PERMANENT, 477 CTLTYPE_STRING, "root_device", NULL, 478 sysctl_machdep_root_device, 0, NULL, 0, 479 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 480 #endif 481 sysctl_createv(clog, 0, NULL, NULL, 482 CTLFLAG_PERMANENT, 483 CTLTYPE_STRING, "booted_kernel", NULL, 484 sysctl_machdep_booted_kernel, 0, NULL, 0, 485 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 486 } 487 488 /* See: sig_machdep.c */ 489 490 /* 491 * Do a sync in preparation for a reboot. 492 * XXX - This could probably be common code. 493 * XXX - And now, most of it is in vfs_shutdown() 494 * XXX - Put waittime checks in there too? 495 */ 496 int waittime = -1; /* XXX - Who else looks at this? -gwr */ 497 static void 498 reboot_sync(void) 499 { 500 501 /* Check waittime here to localize its use to this function. */ 502 if (waittime >= 0) 503 return; 504 waittime = 0; 505 vfs_shutdown(); 506 } 507 508 /* 509 * Common part of the BSD and SunOS reboot system calls. 510 */ 511 __dead void 512 cpu_reboot(int howto, char *user_boot_string) 513 { 514 char *bs, *p; 515 char default_boot_string[8]; 516 517 /* If system is cold, just halt. (early panic?) */ 518 if (cold) 519 goto haltsys; 520 521 /* Un-blank the screen if appropriate. */ 522 cnpollc(1); 523 524 if ((howto & RB_NOSYNC) == 0) { 525 reboot_sync(); 526 /* 527 * If we've been adjusting the clock, the todr 528 * will be out of synch; adjust it now. 529 * 530 * XXX - However, if the kernel has been sitting in ddb, 531 * the time will be way off, so don't set the HW clock! 532 * XXX - Should do sanity check against HW clock. -gwr 533 */ 534 /* resettodr(); */ 535 } 536 537 /* Disable interrupts. */ 538 splhigh(); 539 540 /* Write out a crash dump if asked. */ 541 if (howto & RB_DUMP) 542 dumpsys(); 543 544 /* run any shutdown hooks */ 545 doshutdownhooks(); 546 547 pmf_system_shutdown(boothowto); 548 549 if (howto & RB_HALT) { 550 haltsys: 551 printf("halted.\n"); 552 prom_halt(); 553 } 554 555 /* 556 * Automatic reboot. 557 */ 558 bs = user_boot_string; 559 if (bs == NULL) { 560 /* 561 * Build our own boot string with an empty 562 * boot device/file and (maybe) some flags. 563 * The PROM will supply the device/file name. 564 */ 565 bs = default_boot_string; 566 *bs = '\0'; 567 if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) { 568 /* Append the boot flags. */ 569 p = bs; 570 *p++ = ' '; 571 *p++ = '-'; 572 if (howto & RB_KDB) 573 *p++ = 'd'; 574 if (howto & RB_ASKNAME) 575 *p++ = 'a'; 576 if (howto & RB_SINGLE) 577 *p++ = 's'; 578 *p = '\0'; 579 } 580 } 581 printf("rebooting...\n"); 582 prom_boot(bs); 583 for (;;) ; 584 /*NOTREACHED*/ 585 } 586 587 /* 588 * These variables are needed by /sbin/savecore 589 */ 590 uint32_t dumpmag = 0x8fca0101; /* magic number */ 591 int dumpsize = 0; /* pages */ 592 long dumplo = 0; /* blocks */ 593 594 #define DUMP_EXTRA 3 /* CPU-dependent extra pages */ 595 596 /* 597 * This is called by main to set dumplo, dumpsize. 598 * Dumps always skip the first PAGE_SIZE of disk space 599 * in case there might be a disk label stored there. 600 * If there is extra space, put dump at the end to 601 * reduce the chance that swapping trashes it. 602 */ 603 void 604 cpu_dumpconf(void) 605 { 606 const struct bdevsw *bdev; 607 int devblks; /* size of dump device in blocks */ 608 int dumpblks; /* size of dump image in blocks */ 609 int (*getsize)(dev_t); 610 611 if (dumpdev == NODEV) 612 return; 613 614 bdev = bdevsw_lookup(dumpdev); 615 if (bdev == NULL) { 616 dumpdev = NODEV; 617 return; 618 } 619 getsize = bdev->d_psize; 620 if (getsize == NULL) 621 return; 622 devblks = (*getsize)(dumpdev); 623 if (devblks <= ctod(1)) 624 return; 625 devblks &= ~(ctod(1)-1); 626 627 /* 628 * Note: savecore expects dumpsize to be the 629 * number of pages AFTER the dump header. 630 */ 631 dumpsize = physmem; 632 633 /* Position dump image near end of space, page aligned. */ 634 dumpblks = ctod(physmem + DUMP_EXTRA); 635 dumplo = devblks - dumpblks; 636 637 /* If it does not fit, truncate it by moving dumplo. */ 638 /* Note: Must force signed comparison. */ 639 if (dumplo < ((long)ctod(1))) { 640 dumplo = ctod(1); 641 dumpsize = dtoc(devblks - dumplo) - DUMP_EXTRA; 642 } 643 } 644 645 /* Note: gdb looks for "dumppcb" in a kernel crash dump. */ 646 struct pcb dumppcb; 647 extern paddr_t avail_start; 648 649 /* 650 * Write a crash dump. The format while in swap is: 651 * kcore_seg_t cpu_hdr; 652 * cpu_kcore_hdr_t cpu_data; 653 * padding (PAGE_SIZE-sizeof(kcore_seg_t)) 654 * pagemap (2*PAGE_SIZE) 655 * physical memory... 656 */ 657 void 658 dumpsys(void) 659 { 660 const struct bdevsw *dsw; 661 kcore_seg_t *kseg_p; 662 cpu_kcore_hdr_t *chdr_p; 663 struct sun2_kcore_hdr *sh; 664 char *vaddr; 665 paddr_t paddr; 666 int psize, todo, chunk; 667 daddr_t blkno; 668 int error = 0; 669 670 if (dumpdev == NODEV) 671 return; 672 dsw = bdevsw_lookup(dumpdev); 673 if (dsw == NULL || dsw->d_psize == NULL) 674 return; 675 if (dumppage == 0) 676 return; 677 678 /* 679 * For dumps during autoconfiguration, 680 * if dump device has already configured... 681 */ 682 if (dumpsize == 0) 683 cpu_dumpconf(); 684 if (dumplo <= 0) { 685 printf("\ndump to dev %u,%u not possible\n", 686 major(dumpdev), minor(dumpdev)); 687 return; 688 } 689 savectx(&dumppcb); 690 691 psize = (*(dsw->d_psize))(dumpdev); 692 if (psize == -1) { 693 printf("dump area unavailable\n"); 694 return; 695 } 696 697 printf("\ndumping to dev %u,%u offset %ld\n", 698 major(dumpdev), minor(dumpdev), dumplo); 699 700 /* 701 * Prepare the dump header, including MMU state. 702 */ 703 blkno = dumplo; 704 todo = dumpsize; /* pages */ 705 vaddr = (char*)dumppage; 706 memset(vaddr, 0, PAGE_SIZE); 707 708 /* Set pointers to all three parts. */ 709 kseg_p = (kcore_seg_t *)vaddr; 710 chdr_p = (cpu_kcore_hdr_t *) (kseg_p + 1); 711 sh = &chdr_p->un._sun2; 712 713 /* Fill in kcore_seg_t part. */ 714 CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 715 kseg_p->c_size = (ctob(DUMP_EXTRA) - sizeof(*kseg_p)); 716 717 /* Fill in cpu_kcore_hdr_t part. */ 718 strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name)); 719 chdr_p->page_size = PAGE_SIZE; 720 chdr_p->kernbase = KERNBASE; 721 722 /* Fill in the sun2_kcore_hdr part (MMU state). */ 723 pmap_kcore_hdr(sh); 724 725 /* Write out the dump header. */ 726 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 727 if (error) 728 goto fail; 729 blkno += btodb(PAGE_SIZE); 730 731 /* translation RAM (pages zero through seven) */ 732 for(chunk = 0; chunk < (PAGE_SIZE * 8); chunk += PAGE_SIZE) { 733 pmap_get_pagemap((int*)vaddr, chunk); 734 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 735 if (error) 736 goto fail; 737 blkno += btodb(PAGE_SIZE); 738 } 739 740 /* 741 * Now dump physical memory. Have to do it in two chunks. 742 * The first chunk is "unmanaged" (by the VM code) and its 743 * range of physical addresses is not allow in pmap_enter. 744 * However, that segment is mapped linearly, so we can just 745 * use the virtual mappings already in place. The second 746 * chunk is done the normal way, using pmap_enter. 747 * 748 * Note that vaddr==(paddr+KERNBASE) for paddr=0 through etext. 749 */ 750 751 /* Do the first chunk (0 <= PA < avail_start) */ 752 paddr = 0; 753 chunk = btoc(avail_start); 754 if (chunk > todo) 755 chunk = todo; 756 do { 757 if ((todo & 0xf) == 0) 758 printf_nolog("\r%4d", todo); 759 vaddr = (char*)(paddr + KERNBASE); 760 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 761 if (error) 762 goto fail; 763 paddr += PAGE_SIZE; 764 blkno += btodb(PAGE_SIZE); 765 --todo; 766 } while (--chunk > 0); 767 768 /* Do the second chunk (avail_start <= PA < dumpsize) */ 769 vaddr = (char*)vmmap; /* Borrow /dev/mem VA */ 770 do { 771 if ((todo & 0xf) == 0) 772 printf_nolog("\r%4d", todo); 773 pmap_kenter_pa(vmmap, paddr | PMAP_NC, VM_PROT_READ, 0); 774 pmap_update(pmap_kernel()); 775 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 776 pmap_kremove(vmmap, PAGE_SIZE); 777 pmap_update(pmap_kernel()); 778 if (error) 779 goto fail; 780 paddr += PAGE_SIZE; 781 blkno += btodb(PAGE_SIZE); 782 } while (--todo > 0); 783 784 printf("\rdump succeeded\n"); 785 return; 786 fail: 787 printf(" dump error=%d\n", error); 788 } 789 790 static void 791 initcpu(void) 792 { 793 /* XXX: Enable RAM parity/ECC checking? */ 794 /* XXX: parityenable(); */ 795 796 } 797 798 /* straptrap() in trap.c */ 799 800 /* from hp300: badaddr() */ 801 802 /* XXX: parityenable() ? */ 803 /* regdump() moved to regdump.c */ 804 805 /* 806 * cpu_exec_aout_makecmds(): 807 * CPU-dependent a.out format hook for execve(). 808 * 809 * Determine if the given exec package refers to something which we 810 * understand and, if so, set up the vmcmds for it. 811 */ 812 int 813 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp) 814 { 815 return ENOEXEC; 816 } 817 818 #if 0 819 /* 820 * Soft interrupt support. 821 */ 822 void 823 isr_soft_request(int level) 824 { 825 u_char bit; 826 827 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 828 return; 829 830 bit = 1 << level; 831 enable_reg_or(bit); 832 } 833 834 void 835 isr_soft_clear(int level) 836 { 837 u_char bit; 838 839 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 840 return; 841 842 bit = 1 << level; 843 enable_reg_and(~bit); 844 } 845 #endif 846 847 /* 848 * Like _bus_dmamap_load(), but for raw memory allocated with 849 * bus_dmamem_alloc(). 850 */ 851 int 852 _bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, 853 int nsegs, bus_size_t size, int flags) 854 { 855 struct vm_page *m; 856 paddr_t pa; 857 bus_addr_t dva; 858 bus_size_t sgsize; 859 struct pglist *mlist; 860 int pagesz = PAGE_SIZE; 861 int error; 862 863 /* 864 * Make sure that on error condition we return "no valid mappings". 865 */ 866 map->dm_nsegs = 0; 867 map->dm_mapsize = 0; 868 869 /* Allocate DVMA addresses */ 870 sgsize = (size + pagesz - 1) & -pagesz; 871 872 /* 873 * If the device can see our entire 24-bit address space, 874 * we can use any properly aligned virtual addresses. 875 */ 876 if ((map->_dm_flags & BUS_DMA_24BIT) != 0) { 877 dva = _bus_dma_valloc_skewed(sgsize, map->_dm_boundary, 878 pagesz, 0); 879 if (dva == 0) 880 return (ENOMEM); 881 } 882 883 /* 884 * Otherwise, we need virtual addresses in DVMA space. 885 */ 886 else { 887 error = extent_alloc(dvmamap, sgsize, pagesz, 888 map->_dm_boundary, 889 (flags & BUS_DMA_NOWAIT) == 0 890 ? EX_WAITOK : EX_NOWAIT, 891 (u_long *)&dva); 892 if (error) 893 return (error); 894 } 895 896 /* Fill in the segment. */ 897 map->dm_segs[0].ds_addr = dva; 898 map->dm_segs[0].ds_len = size; 899 map->dm_segs[0]._ds_va = dva; 900 map->dm_segs[0]._ds_sgsize = sgsize; 901 902 /* Map physical pages into MMU */ 903 mlist = segs[0]._ds_mlist; 904 for (m = TAILQ_FIRST(mlist); m != NULL; m = TAILQ_NEXT(m,pageq.queue)) { 905 if (sgsize == 0) 906 panic("_bus_dmamap_load_raw: size botch"); 907 pa = VM_PAGE_TO_PHYS(m); 908 pmap_enter(pmap_kernel(), dva, 909 (pa & -pagesz) | PMAP_NC, 910 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 911 912 dva += pagesz; 913 sgsize -= pagesz; 914 } 915 pmap_update(pmap_kernel()); 916 917 /* Make the map truly valid. */ 918 map->dm_nsegs = 1; 919 map->dm_mapsize = size; 920 921 return (0); 922 } 923 924 /* 925 * load DMA map with a linear buffer. 926 */ 927 int 928 _bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 929 bus_size_t buflen, struct proc *p, int flags) 930 { 931 bus_size_t sgsize; 932 vaddr_t va = (vaddr_t)buf; 933 int pagesz = PAGE_SIZE; 934 bus_addr_t dva; 935 pmap_t pmap; 936 int rv; 937 938 /* 939 * Make sure that on error condition we return "no valid mappings". 940 */ 941 map->dm_nsegs = 0; 942 map->dm_mapsize = 0; 943 944 if (buflen > map->_dm_size) 945 return (EINVAL); 946 947 /* 948 * A 24-bit device can see all of our kernel address space, so 949 * if we have KVAs, we can just load them as-is, no mapping 950 * necessary. 951 */ 952 if ((map->_dm_flags & BUS_DMA_24BIT) != 0 && p == NULL) { 953 /* 954 * XXX Need to implement "don't DMA across this boundry". 955 */ 956 if (map->_dm_boundary != 0) 957 panic("bus_dmamap_load: boundaries not implemented"); 958 map->dm_mapsize = buflen; 959 map->dm_nsegs = 1; 960 map->dm_segs[0].ds_addr = (bus_addr_t)va; 961 map->dm_segs[0].ds_len = buflen; 962 map->_dm_flags |= _BUS_DMA_DIRECTMAP; 963 return (0); 964 } 965 966 /* 967 * Allocate a region in DVMA space. 968 */ 969 sgsize = m68k_round_page(buflen + (va & (pagesz - 1))); 970 971 if (extent_alloc(dvmamap, sgsize, pagesz, map->_dm_boundary, 972 (flags & BUS_DMA_NOWAIT) == 0 ? EX_WAITOK : EX_NOWAIT, 973 (u_long *)&dva) != 0) { 974 return (ENOMEM); 975 } 976 977 /* Fill in the segment. */ 978 map->dm_segs[0].ds_addr = dva + (va & (pagesz - 1)); 979 map->dm_segs[0].ds_len = buflen; 980 map->dm_segs[0]._ds_va = dva; 981 map->dm_segs[0]._ds_sgsize = sgsize; 982 983 /* 984 * Now map the DVMA addresses we allocated to point to the 985 * pages of the caller's buffer. 986 */ 987 if (p != NULL) 988 pmap = p->p_vmspace->vm_map.pmap; 989 else 990 pmap = pmap_kernel(); 991 992 for (; buflen > 0; ) { 993 paddr_t pa; 994 /* 995 * Get the physical address for this page. 996 */ 997 rv = pmap_extract(pmap, va, &pa); 998 #ifdef DIAGNOSTIC 999 if (!rv) 1000 panic("_bus_dmamap_load: no page"); 1001 #endif /* DIAGNOSTIC */ 1002 1003 /* 1004 * Compute the segment size, and adjust counts. 1005 */ 1006 sgsize = pagesz - (va & (pagesz - 1)); 1007 if (buflen < sgsize) 1008 sgsize = buflen; 1009 1010 pmap_enter(pmap_kernel(), dva, 1011 (pa & -pagesz) | PMAP_NC, 1012 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 1013 1014 dva += pagesz; 1015 va += sgsize; 1016 buflen -= sgsize; 1017 } 1018 pmap_update(pmap_kernel()); 1019 1020 /* Make the map truly valid. */ 1021 map->dm_nsegs = 1; 1022 map->dm_mapsize = map->dm_segs[0].ds_len; 1023 1024 return (0); 1025 } 1026 1027 /* 1028 * unload a DMA map. 1029 */ 1030 void 1031 _bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 1032 { 1033 bus_dma_segment_t *segs = map->dm_segs; 1034 int nsegs = map->dm_nsegs; 1035 int flags = map->_dm_flags; 1036 bus_addr_t dva; 1037 bus_size_t len; 1038 int s, error; 1039 1040 if (nsegs != 1) 1041 panic("_bus_dmamem_unload: nsegs = %d", nsegs); 1042 1043 /* 1044 * _BUS_DMA_DIRECTMAP is set iff this map was loaded using 1045 * _bus_dmamap_load for a 24-bit device. 1046 */ 1047 if ((flags & _BUS_DMA_DIRECTMAP) != 0) { 1048 /* Nothing to release */ 1049 map->_dm_flags &= ~_BUS_DMA_DIRECTMAP; 1050 } 1051 1052 /* 1053 * Otherwise, this map was loaded using _bus_dmamap_load for a 1054 * non-24-bit device, or using _bus_dmamap_load_raw. 1055 */ 1056 else { 1057 dva = segs[0]._ds_va & -PAGE_SIZE; 1058 len = segs[0]._ds_sgsize; 1059 1060 /* 1061 * Unmap the DVMA addresses. 1062 */ 1063 pmap_remove(pmap_kernel(), dva, dva + len); 1064 pmap_update(pmap_kernel()); 1065 1066 /* 1067 * Free the DVMA addresses. 1068 */ 1069 if ((flags & BUS_DMA_24BIT) != 0) { 1070 /* 1071 * This map was loaded using _bus_dmamap_load_raw 1072 * for a 24-bit device. 1073 */ 1074 uvm_unmap(kernel_map, dva, dva + len); 1075 } else { 1076 /* 1077 * This map was loaded using _bus_dmamap_load or 1078 * _bus_dmamap_load_raw for a non-24-bit device. 1079 */ 1080 s = splhigh(); 1081 error = extent_free(dvmamap, dva, len, EX_NOWAIT); 1082 splx(s); 1083 if (error != 0) 1084 printf("warning: %ld of DVMA space lost\n", len); 1085 } 1086 } 1087 1088 /* Mark the mappings as invalid. */ 1089 map->dm_mapsize = 0; 1090 map->dm_nsegs = 0; 1091 } 1092 1093 /* 1094 * Translate a VME address and address modifier 1095 * into a CPU physical address and page type. 1096 */ 1097 int 1098 vmebus_translate(vme_am_t mod, vme_addr_t addr, bus_type_t *btp, 1099 bus_addr_t *bap) 1100 { 1101 bus_addr_t base; 1102 1103 switch(mod) { 1104 #define _DS (VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA) 1105 1106 case (VME_AM_A16|_DS): 1107 base = 0x00ff0000; 1108 break; 1109 1110 case (VME_AM_A24|_DS): 1111 base = 0; 1112 break; 1113 1114 default: 1115 return (ENOENT); 1116 #undef _DS 1117 } 1118 1119 *bap = base | addr; 1120 *btp = (*bap & 0x800000 ? PMAP_VME8 : PMAP_VME0); 1121 return (0); 1122 } 1123 1124 /* 1125 * If we can find a mapping that was established by the PROM, use it. 1126 */ 1127 int 1128 find_prom_map(paddr_t pa, bus_type_t iospace, int len, vaddr_t *vap) 1129 { 1130 u_long pf; 1131 int pgtype; 1132 vaddr_t va, eva; 1133 int sme; 1134 u_long pte; 1135 int saved_ctx; 1136 1137 /* 1138 * The mapping must fit entirely within one page. 1139 */ 1140 if ((((u_long)pa & PGOFSET) + len) > PAGE_SIZE) 1141 return EINVAL; 1142 1143 pf = PA_PGNUM(pa); 1144 pgtype = iospace << PG_MOD_SHIFT; 1145 saved_ctx = kernel_context(); 1146 1147 /* 1148 * Walk the PROM address space, looking for a page with the 1149 * mapping we want. 1150 */ 1151 for (va = SUN_MONSTART; va < SUN_MONEND; ) { 1152 1153 /* 1154 * Make sure this segment is mapped. 1155 */ 1156 sme = get_segmap(va); 1157 if (sme == SEGINV) { 1158 va += NBSG; 1159 continue; /* next segment */ 1160 } 1161 1162 /* 1163 * Walk the pages of this segment. 1164 */ 1165 for(eva = va + NBSG; va < eva; va += PAGE_SIZE) { 1166 pte = get_pte(va); 1167 1168 if ((pte & (PG_VALID | PG_TYPE)) == 1169 (PG_VALID | pgtype) && 1170 PG_PFNUM(pte) == pf) 1171 { 1172 /* 1173 * Found the PROM mapping. 1174 * note: preserve page offset 1175 */ 1176 *vap = (va | ((vaddr_t)pa & PGOFSET)); 1177 restore_context(saved_ctx); 1178 return 0; 1179 } 1180 } 1181 } 1182 restore_context(saved_ctx); 1183 return ENOENT; 1184 } 1185