machdep.c revision 1.93
1 /* $NetBSD: machdep.c,v 1.93 2003/12/04 19:38:22 atatat 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 * Copyright (c) 1988 University of Utah. 40 * 41 * This code is derived from software contributed to Berkeley by 42 * the Systems Programming Group of the University of Utah Computer 43 * Science Department. 44 * 45 * Redistribution and use in source and binary forms, with or without 46 * modification, are permitted provided that the following conditions 47 * are met: 48 * 1. Redistributions of source code must retain the above copyright 49 * notice, this list of conditions and the following disclaimer. 50 * 2. Redistributions in binary form must reproduce the above copyright 51 * notice, this list of conditions and the following disclaimer in the 52 * documentation and/or other materials provided with the distribution. 53 * 3. All advertising materials mentioning features or use of this software 54 * must display the following acknowledgement: 55 * This product includes software developed by the University of 56 * California, Berkeley and its contributors. 57 * 4. Neither the name of the University nor the names of its contributors 58 * may be used to endorse or promote products derived from this software 59 * without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 62 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 63 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 64 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 65 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 66 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 67 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 68 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 69 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 70 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 71 * SUCH DAMAGE. 72 * 73 * from: Utah Hdr: machdep.c 1.74 92/12/20 74 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 75 */ 76 77 #include <sys/cdefs.h> 78 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.93 2003/12/04 19:38:22 atatat Exp $"); 79 80 #include "opt_ddb.h" 81 #include "opt_kgdb.h" 82 83 #include <sys/param.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/proc.h> 87 #include <sys/buf.h> 88 #include <sys/reboot.h> 89 #include <sys/conf.h> 90 #include <sys/file.h> 91 #include <sys/device.h> 92 #include <sys/malloc.h> 93 #include <sys/mbuf.h> 94 #include <sys/msgbuf.h> 95 #include <sys/ioctl.h> 96 #include <sys/tty.h> 97 #include <sys/mount.h> 98 #include <sys/user.h> 99 #include <sys/exec.h> 100 #include <sys/core.h> 101 #include <sys/kcore.h> 102 #include <sys/vnode.h> 103 #include <sys/sa.h> 104 #include <sys/syscallargs.h> 105 #include <sys/ksyms.h> 106 #ifdef KGDB 107 #include <sys/kgdb.h> 108 #endif 109 110 #include <uvm/uvm_extern.h> 111 112 #include <sys/sysctl.h> 113 114 #include <dev/cons.h> 115 116 #include <machine/cpu.h> 117 #include <machine/dvma.h> 118 #include <machine/idprom.h> 119 #include <machine/kcore.h> 120 #include <machine/reg.h> 121 #include <machine/psl.h> 122 #include <machine/pte.h> 123 124 #if defined(DDB) 125 #include <machine/db_machdep.h> 126 #include <ddb/db_sym.h> 127 #include <ddb/db_extern.h> 128 #endif 129 130 #include <sun3/sun3/machdep.h> 131 132 #include "ksyms.h" 133 134 /* Defined in locore.s */ 135 extern char kernel_text[]; 136 /* Defined by the linker */ 137 extern char etext[]; 138 139 /* Our exported CPU info; we can have only one. */ 140 struct cpu_info cpu_info_store; 141 142 struct vm_map *exec_map = NULL; 143 struct vm_map *mb_map = NULL; 144 struct vm_map *phys_map = NULL; 145 146 int physmem; 147 int fputype; 148 caddr_t msgbufaddr; 149 150 /* Virtual page frame for /dev/mem (see mem.c) */ 151 vaddr_t vmmap; 152 153 union sun3sir sun3sir; 154 155 /* 156 * safepri is a safe priority for sleep to set for a spin-wait 157 * during autoconfiguration or after a panic. 158 */ 159 int safepri = PSL_LOWIPL; 160 161 u_char cpu_machine_id = 0; 162 char *cpu_string = NULL; 163 int cpu_has_vme = 0; 164 int has_iocache = 0; 165 166 vaddr_t dumppage; 167 168 static void identifycpu __P((void)); 169 static void initcpu __P((void)); 170 171 /* 172 * Console initialization: called early on from main, 173 * before vm init or cpu_startup. This system is able 174 * to use the console for output immediately (via PROM) 175 * but can not use it for input until after this point. 176 */ 177 void 178 consinit() 179 { 180 181 /* 182 * Switch from the PROM console (output only) 183 * to our own console driver. 184 */ 185 cninit(); 186 187 #if NKSYMS || defined(DDB) || defined(LKM) 188 { 189 extern int nsym; 190 extern char *ssym, *esym; 191 192 ksyms_init(nsym, ssym, esym); 193 } 194 #endif /* DDB */ 195 196 /* 197 * Now that the console can do input as well as 198 * output, consider stopping for a debugger. 199 */ 200 if (boothowto & RB_KDB) { 201 #ifdef KGDB 202 /* XXX - Ask on console for kgdb_dev? */ 203 /* Note: this will just return if kgdb_dev==NODEV */ 204 kgdb_connect(1); 205 #else /* KGDB */ 206 /* Either DDB or no debugger (just PROM). */ 207 Debugger(); 208 #endif /* KGDB */ 209 } 210 } 211 212 /* 213 * cpu_startup: allocate memory for variable-sized tables, 214 * initialize cpu, and do autoconfiguration. 215 * 216 * This is called early in init_main.c:main(), after the 217 * kernel memory allocator is ready for use, but before 218 * the creation of processes 1,2, and mountroot, etc. 219 */ 220 void 221 cpu_startup() 222 { 223 caddr_t v; 224 vsize_t size; 225 int sz, i, base, residual; 226 vaddr_t minaddr, maxaddr; 227 char pbuf[9]; 228 229 if (fputype != FPU_NONE) 230 m68k_make_fpu_idle_frame(); 231 232 /* 233 * Initialize message buffer (for kernel printf). 234 * This is put in physical page zero so it will 235 * always be in the same place after a reboot. 236 * Its mapping was prepared in pmap_bootstrap(). 237 * Also, offset some to avoid PROM scribbles. 238 */ 239 v = (caddr_t) KERNBASE; 240 msgbufaddr = (caddr_t)(v + MSGBUFOFF); 241 initmsgbuf(msgbufaddr, MSGBUFSIZE); 242 243 /* 244 * Good {morning,afternoon,evening,night}. 245 */ 246 printf(version); 247 identifycpu(); 248 initfpu(); /* also prints FPU type */ 249 250 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 251 printf("total memory = %s\n", pbuf); 252 253 /* 254 * Get scratch page for dumpsys(). 255 */ 256 if ((dumppage = uvm_km_alloc(kernel_map, PAGE_SIZE)) == 0) 257 panic("startup: alloc dumppage"); 258 259 /* 260 * Find out how much space we need, allocate it, 261 * and then give everything true virtual addresses. 262 */ 263 sz = (u_int)allocsys(NULL, NULL); 264 if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(sz))) == 0) 265 panic("startup: no room for tables"); 266 if (allocsys(v, NULL) - v != sz) 267 panic("startup: table size inconsistency"); 268 269 /* 270 * Now allocate buffers proper. They are different than the above 271 * in that they usually occupy more virtual memory than physical. 272 */ 273 size = MAXBSIZE * nbuf; 274 if (uvm_map(kernel_map, (vaddr_t *)(void *)&buffers, round_page(size), 275 NULL, UVM_UNKNOWN_OFFSET, 0, 276 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 277 UVM_ADV_NORMAL, 0)) != 0) 278 panic("startup: cannot allocate VM for buffers"); 279 minaddr = (vaddr_t)buffers; 280 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 281 /* don't want to alloc more physical mem than needed */ 282 bufpages = btoc(MAXBSIZE) * nbuf; 283 } 284 base = bufpages / nbuf; 285 residual = bufpages % nbuf; 286 for (i = 0; i < nbuf; i++) { 287 vsize_t curbufsize; 288 vaddr_t curbuf; 289 struct vm_page *pg; 290 291 /* 292 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 293 * that MAXBSIZE space, we allocate and map (base+1) pages 294 * for the first "residual" buffers, and then we allocate 295 * "base" pages for the rest. 296 */ 297 curbuf = (vaddr_t) buffers + (i * MAXBSIZE); 298 curbufsize = PAGE_SIZE * ((i < residual) ? (base+1) : base); 299 300 while (curbufsize) { 301 pg = uvm_pagealloc(NULL, 0, NULL, 0); 302 if (pg == NULL) 303 panic("cpu_startup: not enough memory for " 304 "buffer cache"); 305 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 306 VM_PROT_READ|VM_PROT_WRITE); 307 curbuf += PAGE_SIZE; 308 curbufsize -= PAGE_SIZE; 309 } 310 } 311 pmap_update(pmap_kernel()); 312 313 /* 314 * Allocate a submap for exec arguments. This map effectively 315 * limits the number of processes exec'ing at any time. 316 */ 317 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 318 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 319 320 /* 321 * Allocate a submap for physio 322 */ 323 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 324 VM_PHYS_SIZE, 0, FALSE, NULL); 325 326 /* 327 * Finally, allocate mbuf cluster submap. 328 */ 329 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 330 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 331 FALSE, NULL); 332 333 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 334 printf("avail memory = %s\n", pbuf); 335 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 336 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 337 338 /* 339 * Allocate a virtual page (for use by /dev/mem) 340 * This page is handed to pmap_enter() therefore 341 * it has to be in the normal kernel VA range. 342 */ 343 vmmap = uvm_km_valloc_wait(kernel_map, PAGE_SIZE); 344 345 /* 346 * Create the DVMA maps. 347 */ 348 dvma_init(); 349 350 /* 351 * Set up CPU-specific registers, cache, etc. 352 */ 353 initcpu(); 354 355 /* 356 * Set up buffers, so they can be used to read disk labels. 357 */ 358 bufinit(); 359 } 360 361 /* 362 * Set registers on exec. 363 */ 364 void 365 setregs(l, pack, stack) 366 struct lwp *l; 367 struct exec_package *pack; 368 u_long stack; 369 { 370 struct trapframe *tf = (struct trapframe *)l->l_md.md_regs; 371 372 tf->tf_sr = PSL_USERSET; 373 tf->tf_pc = pack->ep_entry & ~1; 374 tf->tf_regs[D0] = 0; 375 tf->tf_regs[D1] = 0; 376 tf->tf_regs[D2] = 0; 377 tf->tf_regs[D3] = 0; 378 tf->tf_regs[D4] = 0; 379 tf->tf_regs[D5] = 0; 380 tf->tf_regs[D6] = 0; 381 tf->tf_regs[D7] = 0; 382 tf->tf_regs[A0] = 0; 383 tf->tf_regs[A1] = 0; 384 tf->tf_regs[A2] = (int)l->l_proc->p_psstr; 385 tf->tf_regs[A3] = 0; 386 tf->tf_regs[A4] = 0; 387 tf->tf_regs[A5] = 0; 388 tf->tf_regs[A6] = 0; 389 tf->tf_regs[SP] = stack; 390 391 /* restore a null state frame */ 392 l->l_addr->u_pcb.pcb_fpregs.fpf_null = 0; 393 if (fputype) 394 m68881_restore(&l->l_addr->u_pcb.pcb_fpregs); 395 396 l->l_md.md_flags = 0; 397 } 398 399 /* 400 * Info for CTL_HW 401 */ 402 char machine[16] = MACHINE; /* from <machine/param.h> */ 403 char kernel_arch[16] = "sun3x"; /* XXX needs a sysctl node */ 404 char cpu_model[120]; 405 406 /* 407 * XXX - Should empirically estimate the divisor... 408 * Note that the value of delay_divisor is roughly 409 * 2048 / cpuclock (where cpuclock is in MHz). 410 */ 411 int delay_divisor = 62; /* assume the fastest (33 MHz) */ 412 413 void 414 identifycpu() 415 { 416 u_char machtype; 417 418 machtype = identity_prom.idp_machtype; 419 if ((machtype & IDM_ARCH_MASK) != IDM_ARCH_SUN3X) { 420 printf("Bad IDPROM arch!\n"); 421 sunmon_abort(); 422 } 423 424 cpu_machine_id = machtype; 425 switch (cpu_machine_id) { 426 427 case SUN3X_MACH_80: 428 cpu_string = "80"; /* Hydra */ 429 delay_divisor = 102; /* 20 MHz */ 430 cpu_has_vme = FALSE; 431 break; 432 433 case SUN3X_MACH_470: 434 cpu_string = "470"; /* Pegasus */ 435 delay_divisor = 62; /* 33 MHz */ 436 cpu_has_vme = TRUE; 437 break; 438 439 default: 440 printf("unknown sun3x model\n"); 441 sunmon_abort(); 442 } 443 444 /* Other stuff? (VAC, mc6888x version, etc.) */ 445 /* Note: miniroot cares about the kernel_arch part. */ 446 sprintf(cpu_model, "%s %s", kernel_arch, cpu_string); 447 448 printf("Model: %s\n", cpu_model); 449 } 450 451 /* 452 * machine dependent system variables. 453 */ 454 #if 0 /* XXX - Not yet... */ 455 static int 456 sysctl_machdep_root_device(SYSCTLFN_ARGS) 457 { 458 struct sysctlnode node = *rnode; 459 460 node.sysctl_data = some permutation on root_device; 461 node.sysctl_size = strlen(root_device) + 1; 462 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 463 } 464 465 static int 466 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 467 { 468 struct sysctlnode node = *rnode; 469 470 node.sysctl_data = some permutation on booted_kernel; 471 node.sysctl_size = strlen(booted_kernel) + 1; 472 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 473 } 474 #endif 475 476 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 477 { 478 479 sysctl_createv(SYSCTL_PERMANENT, 480 CTLTYPE_NODE, "machdep", NULL, 481 NULL, 0, NULL, 0, 482 CTL_MACHDEP, CTL_EOL); 483 484 sysctl_createv(SYSCTL_PERMANENT, 485 CTLTYPE_STRUCT, "console_device", NULL, 486 sysctl_consdev, 0, NULL, sizeof(dev_t), 487 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 488 #if 0 /* XXX - Not yet... */ 489 sysctl_createv(SYSCTL_PERMANENT, 490 CTLTYPE_STRING, "root_device", NULL, 491 sysctl_machdep_root_device, 0, NULL, 0, 492 CTL_MACHDEP, CPU_ROOT_DEVICE, CTL_EOL); 493 sysctl_createv(SYSCTL_PERMANENT, 494 CTLTYPE_STRING, "booted_kernel", NULL, 495 sysctl_machdep_booted_kernel, 0, NULL, 0, 496 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 497 #endif 498 } 499 500 /* See: sig_machdep.c */ 501 502 /* 503 * Do a sync in preparation for a reboot. 504 * XXX - This could probably be common code. 505 * XXX - And now, most of it is in vfs_shutdown() 506 * XXX - Put waittime checks in there too? 507 */ 508 int waittime = -1; /* XXX - Who else looks at this? -gwr */ 509 static void 510 reboot_sync __P((void)) 511 { 512 513 /* Check waittime here to localize its use to this function. */ 514 if (waittime >= 0) 515 return; 516 waittime = 0; 517 vfs_shutdown(); 518 } 519 520 /* 521 * Common part of the BSD and SunOS reboot system calls. 522 */ 523 __dead void 524 cpu_reboot(howto, user_boot_string) 525 int howto; 526 char *user_boot_string; 527 { 528 /* Note: this string MUST be static! */ 529 static char bootstr[128]; 530 char *p; 531 532 /* If system is cold, just halt. (early panic?) */ 533 if (cold) 534 goto haltsys; 535 536 /* Un-blank the screen if appropriate. */ 537 cnpollc(1); 538 539 if ((howto & RB_NOSYNC) == 0) { 540 reboot_sync(); 541 /* 542 * If we've been adjusting the clock, the todr 543 * will be out of synch; adjust it now. 544 * 545 * XXX - However, if the kernel has been sitting in ddb, 546 * the time will be way off, so don't set the HW clock! 547 * XXX - Should do sanity check against HW clock. -gwr 548 */ 549 /* resettodr(); */ 550 } 551 552 /* Disable interrupts. */ 553 splhigh(); 554 555 /* Write out a crash dump if asked. */ 556 if (howto & RB_DUMP) 557 dumpsys(); 558 559 /* run any shutdown hooks */ 560 doshutdownhooks(); 561 562 if (howto & RB_HALT) { 563 haltsys: 564 printf("halted.\n"); 565 sunmon_halt(); 566 } 567 568 /* 569 * Automatic reboot. 570 */ 571 if (user_boot_string) 572 strncpy(bootstr, user_boot_string, sizeof(bootstr)); 573 else { 574 /* 575 * Build our own boot string with an empty 576 * boot device/file and (maybe) some flags. 577 * The PROM will supply the device/file name. 578 */ 579 p = bootstr; 580 *p = '\0'; 581 if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) { 582 /* Append the boot flags. */ 583 *p++ = ' '; 584 *p++ = '-'; 585 if (howto & RB_KDB) 586 *p++ = 'd'; 587 if (howto & RB_ASKNAME) 588 *p++ = 'a'; 589 if (howto & RB_SINGLE) 590 *p++ = 's'; 591 *p = '\0'; 592 } 593 } 594 printf("rebooting...\n"); 595 sunmon_reboot(bootstr); 596 for (;;) ; 597 /*NOTREACHED*/ 598 } 599 600 /* 601 * These variables are needed by /sbin/savecore 602 */ 603 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 604 int dumpsize = 0; /* pages */ 605 long dumplo = 0; /* blocks */ 606 607 #define DUMP_EXTRA 1 /* CPU-dependent extra pages */ 608 609 /* 610 * This is called by main to set dumplo, dumpsize. 611 * Dumps always skip the first PAGE_SIZE of disk space 612 * in case there might be a disk label stored there. 613 * If there is extra space, put dump at the end to 614 * reduce the chance that swapping trashes it. 615 */ 616 void 617 cpu_dumpconf() 618 { 619 const struct bdevsw *bdev; 620 int devblks; /* size of dump device in blocks */ 621 int dumpblks; /* size of dump image in blocks */ 622 int (*getsize)__P((dev_t)); 623 624 if (dumpdev == NODEV) 625 return; 626 627 bdev = bdevsw_lookup(dumpdev); 628 if (bdev == NULL) 629 panic("dumpconf: bad dumpdev=0x%x", dumpdev); 630 getsize = bdev->d_psize; 631 if (getsize == NULL) 632 return; 633 devblks = (*getsize)(dumpdev); 634 if (devblks <= ctod(1)) 635 return; 636 devblks &= ~(ctod(1) - 1); 637 638 /* 639 * Note: savecore expects dumpsize to be the 640 * number of pages AFTER the dump header. 641 */ 642 dumpsize = physmem; /* pages */ 643 644 /* Position dump image near end of space, page aligned. */ 645 dumpblks = ctod(physmem + DUMP_EXTRA); 646 dumplo = devblks - dumpblks; 647 648 /* If it does not fit, truncate it by moving dumplo. */ 649 /* Note: Must force signed comparison. */ 650 if (dumplo < ((long)ctod(1))) { 651 dumplo = ctod(1); 652 dumpsize = dtoc(devblks - dumplo) - DUMP_EXTRA; 653 } 654 } 655 656 /* Note: gdb looks for "dumppcb" in a kernel crash dump. */ 657 struct pcb dumppcb; 658 659 /* 660 * Write a crash dump. The format while in swap is: 661 * kcore_seg_t cpu_hdr; 662 * cpu_kcore_hdr_t cpu_data; 663 * padding (PAGE_SIZE-sizeof(kcore_seg_t)) 664 * pagemap (2*PAGE_SIZE) 665 * physical memory... 666 */ 667 void 668 dumpsys() 669 { 670 const struct bdevsw *dsw; 671 kcore_seg_t *kseg_p; 672 cpu_kcore_hdr_t *chdr_p; 673 struct sun3x_kcore_hdr *sh; 674 phys_ram_seg_t *crs_p; 675 char *vaddr; 676 paddr_t paddr; 677 int psize, todo, seg, segsz; 678 daddr_t blkno; 679 int error = 0; 680 681 if (dumpdev == NODEV) 682 return; 683 dsw = bdevsw_lookup(dumpdev); 684 if (dsw == NULL || dsw->d_psize == NULL) 685 return; 686 687 /* 688 * For dumps during autoconfiguration, 689 * if dump device has already configured... 690 */ 691 if (dumpsize == 0) 692 cpu_dumpconf(); 693 if (dumplo <= 0) { 694 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 695 minor(dumpdev)); 696 return; 697 } 698 savectx(&dumppcb); 699 700 psize = (*(dsw->d_psize))(dumpdev); 701 if (psize == -1) { 702 printf("dump area unavailable\n"); 703 return; 704 } 705 706 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 707 minor(dumpdev), dumplo); 708 709 /* 710 * Prepare the dump header 711 */ 712 blkno = dumplo; 713 todo = dumpsize; /* pages */ 714 vaddr = (char *)dumppage; 715 memset(vaddr, 0, PAGE_SIZE); 716 717 /* Set pointers to all three parts. */ 718 kseg_p = (kcore_seg_t *)vaddr; 719 chdr_p = (cpu_kcore_hdr_t *)(kseg_p + 1); 720 sh = &chdr_p->un._sun3x; 721 722 /* Fill in kcore_seg_t part. */ 723 CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 724 kseg_p->c_size = (ctob(DUMP_EXTRA) - sizeof(*kseg_p)); 725 726 /* Fill in cpu_kcore_hdr_t part. */ 727 strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name)); 728 chdr_p->page_size = PAGE_SIZE; 729 chdr_p->kernbase = KERNBASE; 730 731 /* Fill in the sun3x_kcore_hdr part. */ 732 pmap_kcore_hdr(sh); 733 734 /* Write out the dump header. */ 735 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, PAGE_SIZE); 736 if (error) 737 goto fail; 738 blkno += btodb(PAGE_SIZE); 739 740 /* 741 * Now dump physical memory. Note that physical memory 742 * might NOT be congiguous, so do it by segments. 743 */ 744 745 vaddr = (char *)vmmap; /* Borrow /dev/mem VA */ 746 747 for (seg = 0; seg < SUN3X_NPHYS_RAM_SEGS; seg++) { 748 crs_p = &sh->ram_segs[seg]; 749 paddr = crs_p->start; 750 segsz = crs_p->size; 751 752 while (todo && (segsz > 0)) { 753 754 /* Print pages left after every 16. */ 755 if ((todo & 0xf) == 0) 756 printf("\r%4d", todo); 757 758 /* Make a temporary mapping for the page. */ 759 pmap_kenter_pa(vmmap, paddr | PMAP_NC, VM_PROT_READ); 760 pmap_update(pmap_kernel()); 761 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, 762 PAGE_SIZE); 763 pmap_kremove(vmmap, PAGE_SIZE); 764 pmap_update(pmap_kernel()); 765 if (error) 766 goto fail; 767 paddr += PAGE_SIZE; 768 segsz -= PAGE_SIZE; 769 blkno += btodb(PAGE_SIZE); 770 todo--; 771 } 772 } 773 printf("\rdump succeeded\n"); 774 return; 775 fail: 776 printf(" dump error=%d\n", error); 777 } 778 779 static void 780 initcpu() 781 { 782 /* XXX: Enable RAM parity/ECC checking? */ 783 /* XXX: parityenable(); */ 784 785 #ifdef HAVECACHE 786 cache_enable(); 787 #endif 788 } 789 790 /* straptrap() in trap.c */ 791 792 /* from hp300: badaddr() */ 793 /* peek_byte(), peek_word() moved to bus_subr.c */ 794 795 /* XXX: parityenable() ? */ 796 /* regdump() moved to regdump.c */ 797 798 /* 799 * cpu_exec_aout_makecmds(): 800 * cpu-dependent a.out format hook for execve(). 801 * 802 * Determine if the given exec package refers to something which we 803 * understand and, if so, set up the vmcmds for it. 804 */ 805 int 806 cpu_exec_aout_makecmds(p, epp) 807 struct proc *p; 808 struct exec_package *epp; 809 { 810 return ENOEXEC; 811 } 812
Indexes created Fri Sep 26 08:10:20 GMT 2025