1 /* $NetBSD: machdep.c,v 1.57 2008/11/30 18:21:36 martin 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 1.57 2008/11/30 18:21:36 martin Exp $"); 157 158 #include "opt_ddb.h" 159 #include "opt_kgdb.h" 160 #include "opt_fpu_emulate.h" 161 162 #include <sys/param.h> 163 #include <sys/systm.h> 164 #include <sys/kernel.h> 165 #include <sys/proc.h> 166 #include <sys/buf.h> 167 #include <sys/reboot.h> 168 #include <sys/conf.h> 169 #include <sys/file.h> 170 #include <sys/device.h> 171 #include <sys/malloc.h> 172 #include <sys/extent.h> 173 #include <sys/mbuf.h> 174 #include <sys/msgbuf.h> 175 #include <sys/ioctl.h> 176 #include <sys/tty.h> 177 #include <sys/mount.h> 178 #include <sys/user.h> 179 #include <sys/exec.h> 180 #include <sys/core.h> 181 #include <sys/kcore.h> 182 #include <sys/vnode.h> 183 #include <sys/syscallargs.h> 184 #include <sys/ksyms.h> 185 #ifdef KGDB 186 #include <sys/kgdb.h> 187 #endif 188 189 #include <uvm/uvm.h> /* XXX: not _extern ... need vm_map_create */ 190 191 #include <sys/sysctl.h> 192 193 #include <dev/cons.h> 194 195 #include <machine/promlib.h> 196 #include <machine/cpu.h> 197 #include <machine/dvma.h> 198 #include <machine/idprom.h> 199 #include <machine/kcore.h> 200 #include <machine/reg.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 *mb_map = NULL; 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 /* 348 * Finally, allocate mbuf cluster submap. 349 */ 350 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 351 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 352 false, NULL); 353 354 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 355 printf("avail memory = %s\n", pbuf); 356 357 /* 358 * Allocate a virtual page (for use by /dev/mem) 359 * This page is handed to pmap_enter() therefore 360 * it has to be in the normal kernel VA range. 361 */ 362 vmmap = uvm_km_alloc(kernel_map, PAGE_SIZE, 0, 363 UVM_KMF_VAONLY | UVM_KMF_WAITVA); 364 365 /* 366 * Allocate DMA map for devices on the bus. 367 */ 368 dvmamap = extent_create("dvmamap", 369 DVMA_MAP_BASE, DVMA_MAP_BASE + DVMA_MAP_AVAIL, 370 M_DEVBUF, 0, 0, EX_NOWAIT); 371 if (dvmamap == NULL) 372 panic("unable to allocate DVMA map"); 373 374 /* 375 * Set up CPU-specific registers, cache, etc. 376 */ 377 initcpu(); 378 } 379 380 /* 381 * Set registers on exec. 382 */ 383 void 384 setregs(struct lwp *l, struct exec_package *pack, u_long stack) 385 { 386 struct trapframe *tf = (struct trapframe *)l->l_md.md_regs; 387 388 tf->tf_sr = PSL_USERSET; 389 tf->tf_pc = pack->ep_entry & ~1; 390 tf->tf_regs[D0] = 0; 391 tf->tf_regs[D1] = 0; 392 tf->tf_regs[D2] = 0; 393 tf->tf_regs[D3] = 0; 394 tf->tf_regs[D4] = 0; 395 tf->tf_regs[D5] = 0; 396 tf->tf_regs[D6] = 0; 397 tf->tf_regs[D7] = 0; 398 tf->tf_regs[A0] = 0; 399 tf->tf_regs[A1] = 0; 400 tf->tf_regs[A2] = (int)l->l_proc->p_psstr; 401 tf->tf_regs[A3] = 0; 402 tf->tf_regs[A4] = 0; 403 tf->tf_regs[A5] = 0; 404 tf->tf_regs[A6] = 0; 405 tf->tf_regs[SP] = stack; 406 407 /* restore a null state frame */ 408 l->l_addr->u_pcb.pcb_fpregs.fpf_null = 0; 409 410 l->l_md.md_flags = 0; 411 } 412 413 /* 414 * Info for CTL_HW 415 */ 416 char machine[16] = MACHINE; /* from <machine/param.h> */ 417 char kernel_arch[16] = "sun2"; /* XXX needs a sysctl node */ 418 char cpu_model[120]; 419 420 /* 421 * Determine which Sun2 model we are running on. 422 */ 423 void 424 identifycpu(void) 425 { 426 extern char *cpu_string; /* XXX */ 427 428 /* Other stuff? (VAC, mc6888x version, etc.) */ 429 /* Note: miniroot cares about the kernel_arch part. */ 430 sprintf(cpu_model, "%s %s", kernel_arch, cpu_string); 431 432 printf("Model: %s\n", cpu_model); 433 } 434 435 /* 436 * machine dependent system variables. 437 */ 438 #if 0 /* XXX - Not yet... */ 439 static int 440 sysctl_machdep_root_device(SYSCTLFN_ARGS) 441 { 442 struct sysctlnode node = *rnode; 443 444 node.sysctl_data = some permutation on root_device; 445 node.sysctl_size = strlen(root_device) + 1; 446 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 447 } 448 #endif 449 450 static int 451 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 452 { 453 struct sysctlnode node = *rnode; 454 char *cp; 455 456 cp = prom_getbootfile(); 457 if (cp == NULL || cp[0] == '\0') 458 return (ENOENT); 459 460 node.sysctl_data = cp; 461 node.sysctl_size = strlen(cp) + 1; 462 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 463 } 464 465 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 466 { 467 468 sysctl_createv(clog, 0, NULL, NULL, 469 CTLFLAG_PERMANENT, 470 CTLTYPE_NODE, "machdep", NULL, 471 NULL, 0, NULL, 0, 472 CTL_MACHDEP, CTL_EOL); 473 474 sysctl_createv(clog, 0, NULL, NULL, 475 CTLFLAG_PERMANENT, 476 CTLTYPE_STRUCT, "console_device", NULL, 477 sysctl_consdev, 0, NULL, sizeof(dev_t), 478 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 479 #if 0 /* XXX - Not yet... */ 480 sysctl_createv(clog, 0, NULL, NULL, 481 CTLFLAG_PERMANENT, 482 CTLTYPE_STRING, "root_device", NULL, 483 sysctl_machdep_root_device, 0, NULL, 0, 484 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 485 #endif 486 sysctl_createv(clog, 0, NULL, NULL, 487 CTLFLAG_PERMANENT, 488 CTLTYPE_STRING, "booted_kernel", NULL, 489 sysctl_machdep_booted_kernel, 0, NULL, 0, 490 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 491 } 492 493 /* See: sig_machdep.c */ 494 495 /* 496 * Do a sync in preparation for a reboot. 497 * XXX - This could probably be common code. 498 * XXX - And now, most of it is in vfs_shutdown() 499 * XXX - Put waittime checks in there too? 500 */ 501 int waittime = -1; /* XXX - Who else looks at this? -gwr */ 502 static void 503 reboot_sync(void) 504 { 505 506 /* Check waittime here to localize its use to this function. */ 507 if (waittime >= 0) 508 return; 509 waittime = 0; 510 vfs_shutdown(); 511 } 512 513 /* 514 * Common part of the BSD and SunOS reboot system calls. 515 */ 516 __dead void 517 cpu_reboot(int howto, char *user_boot_string) 518 { 519 char *bs, *p; 520 char default_boot_string[8]; 521 522 /* If system is cold, just halt. (early panic?) */ 523 if (cold) 524 goto haltsys; 525 526 /* Un-blank the screen if appropriate. */ 527 cnpollc(1); 528 529 if ((howto & RB_NOSYNC) == 0) { 530 reboot_sync(); 531 /* 532 * If we've been adjusting the clock, the todr 533 * will be out of synch; adjust it now. 534 * 535 * XXX - However, if the kernel has been sitting in ddb, 536 * the time will be way off, so don't set the HW clock! 537 * XXX - Should do sanity check against HW clock. -gwr 538 */ 539 /* resettodr(); */ 540 } 541 542 /* Disable interrupts. */ 543 splhigh(); 544 545 /* Write out a crash dump if asked. */ 546 if (howto & RB_DUMP) 547 dumpsys(); 548 549 /* run any shutdown hooks */ 550 doshutdownhooks(); 551 552 pmf_system_shutdown(boothowto); 553 554 if (howto & RB_HALT) { 555 haltsys: 556 printf("halted.\n"); 557 prom_halt(); 558 } 559 560 /* 561 * Automatic reboot. 562 */ 563 bs = user_boot_string; 564 if (bs == NULL) { 565 /* 566 * Build our own boot string with an empty 567 * boot device/file and (maybe) some flags. 568 * The PROM will supply the device/file name. 569 */ 570 bs = default_boot_string; 571 *bs = '\0'; 572 if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) { 573 /* Append the boot flags. */ 574 p = bs; 575 *p++ = ' '; 576 *p++ = '-'; 577 if (howto & RB_KDB) 578 *p++ = 'd'; 579 if (howto & RB_ASKNAME) 580 *p++ = 'a'; 581 if (howto & RB_SINGLE) 582 *p++ = 's'; 583 *p = '\0'; 584 } 585 } 586 printf("rebooting...\n"); 587 prom_boot(bs); 588 for (;;) ; 589 /*NOTREACHED*/ 590 } 591 592 /* 593 * These variables are needed by /sbin/savecore 594 */ 595 uint32_t dumpmag = 0x8fca0101; /* magic number */ 596 int dumpsize = 0; /* pages */ 597 long dumplo = 0; /* blocks */ 598 599 #define DUMP_EXTRA 3 /* CPU-dependent extra pages */ 600 601 /* 602 * This is called by main to set dumplo, dumpsize. 603 * Dumps always skip the first PAGE_SIZE of disk space 604 * in case there might be a disk label stored there. 605 * If there is extra space, put dump at the end to 606 * reduce the chance that swapping trashes it. 607 */ 608 void 609 cpu_dumpconf(void) 610 { 611 const struct bdevsw *bdev; 612 int devblks; /* size of dump device in blocks */ 613 int dumpblks; /* size of dump image in blocks */ 614 int (*getsize)(dev_t); 615 616 if (dumpdev == NODEV) 617 return; 618 619 bdev = bdevsw_lookup(dumpdev); 620 if (bdev == NULL) { 621 dumpdev = NODEV; 622 return; 623 } 624 getsize = bdev->d_psize; 625 if (getsize == NULL) 626 return; 627 devblks = (*getsize)(dumpdev); 628 if (devblks <= ctod(1)) 629 return; 630 devblks &= ~(ctod(1)-1); 631 632 /* 633 * Note: savecore expects dumpsize to be the 634 * number of pages AFTER the dump header. 635 */ 636 dumpsize = physmem; 637 638 /* Position dump image near end of space, page aligned. */ 639 dumpblks = ctod(physmem + DUMP_EXTRA); 640 dumplo = devblks - dumpblks; 641 642 /* If it does not fit, truncate it by moving dumplo. */ 643 /* Note: Must force signed comparison. */ 644 if (dumplo < ((long)ctod(1))) { 645 dumplo = ctod(1); 646 dumpsize = dtoc(devblks - dumplo) - DUMP_EXTRA; 647 } 648 } 649 650 /* Note: gdb looks for "dumppcb" in a kernel crash dump. */ 651 struct pcb dumppcb; 652 extern paddr_t avail_start; 653 654 /* 655 * Write a crash dump. The format while in swap is: 656 * kcore_seg_t cpu_hdr; 657 * cpu_kcore_hdr_t cpu_data; 658 * padding (PAGE_SIZE-sizeof(kcore_seg_t)) 659 * pagemap (2*PAGE_SIZE) 660 * physical memory... 661 */ 662 void 663 dumpsys(void) 664 { 665 const struct bdevsw *dsw; 666 kcore_seg_t *kseg_p; 667 cpu_kcore_hdr_t *chdr_p; 668 struct sun2_kcore_hdr *sh; 669 char *vaddr; 670 paddr_t paddr; 671 int psize, todo, chunk; 672 daddr_t blkno; 673 int error = 0; 674 675 if (dumpdev == NODEV) 676 return; 677 dsw = bdevsw_lookup(dumpdev); 678 if (dsw == NULL || dsw->d_psize == NULL) 679 return; 680 if (dumppage == 0) 681 return; 682 683 /* 684 * For dumps during autoconfiguration, 685 * if dump device has already configured... 686 */ 687 if (dumpsize == 0) 688 cpu_dumpconf(); 689 if (dumplo <= 0) { 690 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 691 minor(dumpdev)); 692 return; 693 } 694 savectx(&dumppcb); 695 696 psize = (*(dsw->d_psize))(dumpdev); 697 if (psize == -1) { 698 printf("dump area unavailable\n"); 699 return; 700 } 701 702 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 703 minor(dumpdev), dumplo); 704 705 /* 706 * Prepare the dump header, including MMU state. 707 */ 708 blkno = dumplo; 709 todo = dumpsize; /* pages */ 710 vaddr = (char*)dumppage; 711 memset(vaddr, 0, PAGE_SIZE); 712 713 /* Set pointers to all three parts. */ 714 kseg_p = (kcore_seg_t *)vaddr; 715 chdr_p = (cpu_kcore_hdr_t *) (kseg_p + 1); 716 sh = &chdr_p->un._sun2; 717 718 /* Fill in kcore_seg_t part. */ 719 CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 720 kseg_p->c_size = (ctob(DUMP_EXTRA) - sizeof(*kseg_p)); 721 722 /* Fill in cpu_kcore_hdr_t part. */ 723 strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name)); 724 chdr_p->page_size = PAGE_SIZE; 725 chdr_p->kernbase = KERNBASE; 726 727 /* Fill in the sun2_kcore_hdr part (MMU state). */ 728 pmap_kcore_hdr(sh); 729 730 /* Write out the dump header. */ 731 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 732 if (error) 733 goto fail; 734 blkno += btodb(PAGE_SIZE); 735 736 /* translation RAM (pages zero through seven) */ 737 for(chunk = 0; chunk < (PAGE_SIZE * 8); chunk += PAGE_SIZE) { 738 pmap_get_pagemap((int*)vaddr, chunk); 739 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 740 if (error) 741 goto fail; 742 blkno += btodb(PAGE_SIZE); 743 } 744 745 /* 746 * Now dump physical memory. Have to do it in two chunks. 747 * The first chunk is "unmanaged" (by the VM code) and its 748 * range of physical addresses is not allow in pmap_enter. 749 * However, that segment is mapped linearly, so we can just 750 * use the virtual mappings already in place. The second 751 * chunk is done the normal way, using pmap_enter. 752 * 753 * Note that vaddr==(paddr+KERNBASE) for paddr=0 through etext. 754 */ 755 756 /* Do the first chunk (0 <= PA < avail_start) */ 757 paddr = 0; 758 chunk = btoc(avail_start); 759 if (chunk > todo) 760 chunk = todo; 761 do { 762 if ((todo & 0xf) == 0) 763 printf_nolog("\r%4d", todo); 764 vaddr = (char*)(paddr + KERNBASE); 765 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 766 if (error) 767 goto fail; 768 paddr += PAGE_SIZE; 769 blkno += btodb(PAGE_SIZE); 770 --todo; 771 } while (--chunk > 0); 772 773 /* Do the second chunk (avail_start <= PA < dumpsize) */ 774 vaddr = (char*)vmmap; /* Borrow /dev/mem VA */ 775 do { 776 if ((todo & 0xf) == 0) 777 printf_nolog("\r%4d", todo); 778 pmap_kenter_pa(vmmap, paddr | PMAP_NC, VM_PROT_READ); 779 pmap_update(pmap_kernel()); 780 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 781 pmap_kremove(vmmap, PAGE_SIZE); 782 pmap_update(pmap_kernel()); 783 if (error) 784 goto fail; 785 paddr += PAGE_SIZE; 786 blkno += btodb(PAGE_SIZE); 787 } while (--todo > 0); 788 789 printf("\rdump succeeded\n"); 790 return; 791 fail: 792 printf(" dump error=%d\n", error); 793 } 794 795 static void 796 initcpu(void) 797 { 798 /* XXX: Enable RAM parity/ECC checking? */ 799 /* XXX: parityenable(); */ 800 801 } 802 803 /* straptrap() in trap.c */ 804 805 /* from hp300: badaddr() */ 806 807 /* XXX: parityenable() ? */ 808 /* regdump() moved to regdump.c */ 809 810 /* 811 * cpu_exec_aout_makecmds(): 812 * CPU-dependent a.out format hook for execve(). 813 * 814 * Determine if the given exec package refers to something which we 815 * understand and, if so, set up the vmcmds for it. 816 */ 817 int 818 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp) 819 { 820 return ENOEXEC; 821 } 822 823 #if 0 824 /* 825 * Soft interrupt support. 826 */ 827 void 828 isr_soft_request(int level) 829 { 830 u_char bit; 831 832 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 833 return; 834 835 bit = 1 << level; 836 enable_reg_or(bit); 837 } 838 839 void 840 isr_soft_clear(int level) 841 { 842 u_char bit; 843 844 if ((level < _IPL_SOFT_LEVEL_MIN) || (level > _IPL_SOFT_LEVEL_MAX)) 845 return; 846 847 bit = 1 << level; 848 enable_reg_and(~bit); 849 } 850 #endif 851 852 /* 853 * Like _bus_dmamap_load(), but for raw memory allocated with 854 * bus_dmamem_alloc(). 855 */ 856 int 857 _bus_dmamap_load_raw(bus_dma_tag_t t, bus_dmamap_t map, bus_dma_segment_t *segs, 858 int nsegs, bus_size_t size, int flags) 859 { 860 struct vm_page *m; 861 paddr_t pa; 862 bus_addr_t dva; 863 bus_size_t sgsize; 864 struct pglist *mlist; 865 int pagesz = PAGE_SIZE; 866 int error; 867 868 /* 869 * Make sure that on error condition we return "no valid mappings". 870 */ 871 map->dm_nsegs = 0; 872 map->dm_mapsize = 0; 873 874 /* Allocate DVMA addresses */ 875 sgsize = (size + pagesz - 1) & -pagesz; 876 877 /* 878 * If the device can see our entire 24-bit address space, 879 * we can use any properly aligned virtual addresses. 880 */ 881 if ((map->_dm_flags & BUS_DMA_24BIT) != 0) { 882 dva = _bus_dma_valloc_skewed(sgsize, map->_dm_boundary, 883 pagesz, 0); 884 if (dva == 0) 885 return (ENOMEM); 886 } 887 888 /* 889 * Otherwise, we need virtual addresses in DVMA space. 890 */ 891 else { 892 error = extent_alloc(dvmamap, sgsize, pagesz, 893 map->_dm_boundary, 894 (flags & BUS_DMA_NOWAIT) == 0 895 ? EX_WAITOK : EX_NOWAIT, 896 (u_long *)&dva); 897 if (error) 898 return (error); 899 } 900 901 /* Fill in the segment. */ 902 map->dm_segs[0].ds_addr = dva; 903 map->dm_segs[0].ds_len = size; 904 map->dm_segs[0]._ds_va = dva; 905 map->dm_segs[0]._ds_sgsize = sgsize; 906 907 /* Map physical pages into MMU */ 908 mlist = segs[0]._ds_mlist; 909 for (m = TAILQ_FIRST(mlist); m != NULL; m = TAILQ_NEXT(m,pageq.queue)) { 910 if (sgsize == 0) 911 panic("_bus_dmamap_load_raw: size botch"); 912 pa = VM_PAGE_TO_PHYS(m); 913 pmap_enter(pmap_kernel(), dva, 914 (pa & -pagesz) | PMAP_NC, 915 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 916 917 dva += pagesz; 918 sgsize -= pagesz; 919 } 920 pmap_update(pmap_kernel()); 921 922 /* Make the map truly valid. */ 923 map->dm_nsegs = 1; 924 map->dm_mapsize = size; 925 926 return (0); 927 } 928 929 /* 930 * load DMA map with a linear buffer. 931 */ 932 int 933 _bus_dmamap_load(bus_dma_tag_t t, bus_dmamap_t map, void *buf, 934 bus_size_t buflen, struct proc *p, int flags) 935 { 936 bus_size_t sgsize; 937 vaddr_t va = (vaddr_t)buf; 938 int pagesz = PAGE_SIZE; 939 bus_addr_t dva; 940 pmap_t pmap; 941 int rv; 942 943 /* 944 * Make sure that on error condition we return "no valid mappings". 945 */ 946 map->dm_nsegs = 0; 947 map->dm_mapsize = 0; 948 949 if (buflen > map->_dm_size) 950 return (EINVAL); 951 952 /* 953 * A 24-bit device can see all of our kernel address space, so 954 * if we have KVAs, we can just load them as-is, no mapping 955 * necessary. 956 */ 957 if ((map->_dm_flags & BUS_DMA_24BIT) != 0 && p == NULL) { 958 /* 959 * XXX Need to implement "don't DMA across this boundry". 960 */ 961 if (map->_dm_boundary != 0) 962 panic("bus_dmamap_load: boundaries not implemented"); 963 map->dm_mapsize = buflen; 964 map->dm_nsegs = 1; 965 map->dm_segs[0].ds_addr = (bus_addr_t)va; 966 map->dm_segs[0].ds_len = buflen; 967 map->_dm_flags |= _BUS_DMA_DIRECTMAP; 968 return (0); 969 } 970 971 /* 972 * Allocate a region in DVMA space. 973 */ 974 sgsize = m68k_round_page(buflen + (va & (pagesz - 1))); 975 976 if (extent_alloc(dvmamap, sgsize, pagesz, map->_dm_boundary, 977 (flags & BUS_DMA_NOWAIT) == 0 ? EX_WAITOK : EX_NOWAIT, 978 (u_long *)&dva) != 0) { 979 return (ENOMEM); 980 } 981 982 /* Fill in the segment. */ 983 map->dm_segs[0].ds_addr = dva + (va & (pagesz - 1)); 984 map->dm_segs[0].ds_len = buflen; 985 map->dm_segs[0]._ds_va = dva; 986 map->dm_segs[0]._ds_sgsize = sgsize; 987 988 /* 989 * Now map the DVMA addresses we allocated to point to the 990 * pages of the caller's buffer. 991 */ 992 if (p != NULL) 993 pmap = p->p_vmspace->vm_map.pmap; 994 else 995 pmap = pmap_kernel(); 996 997 for (; buflen > 0; ) { 998 paddr_t pa; 999 /* 1000 * Get the physical address for this page. 1001 */ 1002 rv = pmap_extract(pmap, va, &pa); 1003 #ifdef DIAGNOSTIC 1004 if (!rv) 1005 panic("_bus_dmamap_load: no page"); 1006 #endif /* DIAGNOSTIC */ 1007 1008 /* 1009 * Compute the segment size, and adjust counts. 1010 */ 1011 sgsize = pagesz - (va & (pagesz - 1)); 1012 if (buflen < sgsize) 1013 sgsize = buflen; 1014 1015 pmap_enter(pmap_kernel(), dva, 1016 (pa & -pagesz) | PMAP_NC, 1017 VM_PROT_READ|VM_PROT_WRITE, PMAP_WIRED); 1018 1019 dva += pagesz; 1020 va += sgsize; 1021 buflen -= sgsize; 1022 } 1023 pmap_update(pmap_kernel()); 1024 1025 /* Make the map truly valid. */ 1026 map->dm_nsegs = 1; 1027 map->dm_mapsize = map->dm_segs[0].ds_len; 1028 1029 return (0); 1030 } 1031 1032 /* 1033 * unload a DMA map. 1034 */ 1035 void 1036 _bus_dmamap_unload(bus_dma_tag_t t, bus_dmamap_t map) 1037 { 1038 bus_dma_segment_t *segs = map->dm_segs; 1039 int nsegs = map->dm_nsegs; 1040 int flags = map->_dm_flags; 1041 bus_addr_t dva; 1042 bus_size_t len; 1043 int s, error; 1044 1045 if (nsegs != 1) 1046 panic("_bus_dmamem_unload: nsegs = %d", nsegs); 1047 1048 /* 1049 * _BUS_DMA_DIRECTMAP is set iff this map was loaded using 1050 * _bus_dmamap_load for a 24-bit device. 1051 */ 1052 if ((flags & _BUS_DMA_DIRECTMAP) != 0) { 1053 /* Nothing to release */ 1054 map->_dm_flags &= ~_BUS_DMA_DIRECTMAP; 1055 } 1056 1057 /* 1058 * Otherwise, this map was loaded using _bus_dmamap_load for a 1059 * non-24-bit device, or using _bus_dmamap_load_raw. 1060 */ 1061 else { 1062 dva = segs[0]._ds_va & -PAGE_SIZE; 1063 len = segs[0]._ds_sgsize; 1064 1065 /* 1066 * Unmap the DVMA addresses. 1067 */ 1068 pmap_remove(pmap_kernel(), dva, dva + len); 1069 pmap_update(pmap_kernel()); 1070 1071 /* 1072 * Free the DVMA addresses. 1073 */ 1074 if ((flags & BUS_DMA_24BIT) != 0) { 1075 /* 1076 * This map was loaded using _bus_dmamap_load_raw 1077 * for a 24-bit device. 1078 */ 1079 uvm_unmap(kernel_map, dva, dva + len); 1080 } else { 1081 /* 1082 * This map was loaded using _bus_dmamap_load or 1083 * _bus_dmamap_load_raw for a non-24-bit device. 1084 */ 1085 s = splhigh(); 1086 error = extent_free(dvmamap, dva, len, EX_NOWAIT); 1087 splx(s); 1088 if (error != 0) 1089 printf("warning: %ld of DVMA space lost\n", len); 1090 } 1091 } 1092 1093 /* Mark the mappings as invalid. */ 1094 map->dm_mapsize = 0; 1095 map->dm_nsegs = 0; 1096 } 1097 1098 /* 1099 * Translate a VME address and address modifier 1100 * into a CPU physical address and page type. 1101 */ 1102 int 1103 vmebus_translate(vme_am_t mod, vme_addr_t addr, bus_type_t *btp, 1104 bus_addr_t *bap) 1105 { 1106 bus_addr_t base; 1107 1108 switch(mod) { 1109 #define _DS (VME_AM_MBO | VME_AM_SUPER | VME_AM_DATA) 1110 1111 case (VME_AM_A16|_DS): 1112 base = 0x00ff0000; 1113 break; 1114 1115 case (VME_AM_A24|_DS): 1116 base = 0; 1117 break; 1118 1119 default: 1120 return (ENOENT); 1121 #undef _DS 1122 } 1123 1124 *bap = base | addr; 1125 *btp = (*bap & 0x800000 ? PMAP_VME8 : PMAP_VME0); 1126 return (0); 1127 } 1128 1129 /* 1130 * If we can find a mapping that was established by the PROM, use it. 1131 */ 1132 int 1133 find_prom_map(paddr_t pa, bus_type_t iospace, int len, vaddr_t *vap) 1134 { 1135 u_long pf; 1136 int pgtype; 1137 vaddr_t va, eva; 1138 int sme; 1139 u_long pte; 1140 int saved_ctx; 1141 1142 /* 1143 * The mapping must fit entirely within one page. 1144 */ 1145 if ((((u_long)pa & PGOFSET) + len) > PAGE_SIZE) 1146 return EINVAL; 1147 1148 pf = PA_PGNUM(pa); 1149 pgtype = iospace << PG_MOD_SHIFT; 1150 saved_ctx = kernel_context(); 1151 1152 /* 1153 * Walk the PROM address space, looking for a page with the 1154 * mapping we want. 1155 */ 1156 for (va = SUN_MONSTART; va < SUN_MONEND; ) { 1157 1158 /* 1159 * Make sure this segment is mapped. 1160 */ 1161 sme = get_segmap(va); 1162 if (sme == SEGINV) { 1163 va += NBSG; 1164 continue; /* next segment */ 1165 } 1166 1167 /* 1168 * Walk the pages of this segment. 1169 */ 1170 for(eva = va + NBSG; va < eva; va += PAGE_SIZE) { 1171 pte = get_pte(va); 1172 1173 if ((pte & (PG_VALID | PG_TYPE)) == 1174 (PG_VALID | pgtype) && 1175 PG_PFNUM(pte) == pf) 1176 { 1177 /* 1178 * Found the PROM mapping. 1179 * note: preserve page offset 1180 */ 1181 *vap = (va | ((vaddr_t)pa & PGOFSET)); 1182 restore_context(saved_ctx); 1183 return 0; 1184 } 1185 } 1186 } 1187 restore_context(saved_ctx); 1188 return ENOENT; 1189 } 1190