machdep.c revision 1.51
1 /* $NetBSD: machdep.c,v 1.51 1999/05/26 19:16:35 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah Hdr: machdep.c 1.74 92/12/20 41 * from: @(#)machdep.c 8.10 (Berkeley) 4/20/94 42 */ 43 44 #include "opt_ddb.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/map.h> 50 #include <sys/proc.h> 51 #include <sys/buf.h> 52 #include <sys/reboot.h> 53 #include <sys/conf.h> 54 #include <sys/file.h> 55 #include <sys/clist.h> 56 #include <sys/callout.h> 57 #include <sys/device.h> 58 #include <sys/malloc.h> 59 #include <sys/mbuf.h> 60 #include <sys/msgbuf.h> 61 #include <sys/ioctl.h> 62 #include <sys/tty.h> 63 #include <sys/mount.h> 64 #include <sys/user.h> 65 #include <sys/exec.h> 66 #include <sys/core.h> 67 #include <sys/kcore.h> 68 #include <sys/vnode.h> 69 #include <sys/syscallargs.h> 70 #ifdef KGDB 71 #include <sys/kgdb.h> 72 #endif 73 74 #include <vm/vm.h> 75 #include <vm/vm_map.h> 76 #include <vm/vm_kern.h> 77 #include <vm/vm_page.h> 78 79 #include <uvm/uvm_extern.h> 80 81 #include <sys/sysctl.h> 82 83 #include <dev/cons.h> 84 85 #include <machine/cpu.h> 86 #include <machine/dvma.h> 87 #include <machine/idprom.h> 88 #include <machine/kcore.h> 89 #include <machine/reg.h> 90 #include <machine/psl.h> 91 #include <machine/pte.h> 92 93 #if defined(DDB) 94 #include <machine/db_machdep.h> 95 #include <ddb/db_sym.h> 96 #include <ddb/db_extern.h> 97 #endif 98 99 #include <sun3/sun3/machdep.h> 100 101 /* Defined in locore.s */ 102 extern char kernel_text[]; 103 /* Defined by the linker */ 104 extern char etext[]; 105 106 vm_map_t exec_map = NULL; 107 vm_map_t mb_map = NULL; 108 vm_map_t phys_map = NULL; 109 110 int physmem; 111 int fputype; 112 caddr_t msgbufaddr; 113 114 /* Virtual page frame for /dev/mem (see mem.c) */ 115 vm_offset_t vmmap; 116 117 /* 118 * safepri is a safe priority for sleep to set for a spin-wait 119 * during autoconfiguration or after a panic. 120 */ 121 int safepri = PSL_LOWIPL; 122 123 u_char cpu_machine_id = 0; 124 char *cpu_string = NULL; 125 int cpu_has_vme = 0; 126 int has_iocache = 0; 127 128 static void identifycpu __P((void)); 129 static void initcpu __P((void)); 130 131 /* 132 * Console initialization: called early on from main, 133 * before vm init or cpu_startup. This system is able 134 * to use the console for output immediately (via PROM) 135 * but can not use it for input until after this point. 136 */ 137 void 138 consinit() 139 { 140 141 /* 142 * Switch from the PROM console (output only) 143 * to our own console driver. 144 */ 145 cninit(); 146 147 #ifdef DDB 148 db_machine_init(); 149 { 150 extern int end[]; 151 extern char *esym; 152 153 /* symsize, symstart, symend */ 154 ddb_init(end[0], end + 1, (int*)esym); 155 } 156 #endif DDB 157 158 /* 159 * Now that the console can do input as well as 160 * output, consider stopping for a debugger. 161 */ 162 if (boothowto & RB_KDB) { 163 #ifdef KGDB 164 /* XXX - Ask on console for kgdb_dev? */ 165 /* Note: this will just return if kgdb_dev==NODEV */ 166 kgdb_connect(1); 167 #else /* KGDB */ 168 /* Either DDB or no debugger (just PROM). */ 169 Debugger(); 170 #endif /* KGDB */ 171 } 172 } 173 174 /* 175 * cpu_startup: allocate memory for variable-sized tables, 176 * initialize cpu, and do autoconfiguration. 177 * 178 * This is called early in init_main.c:main(), after the 179 * kernel memory allocator is ready for use, but before 180 * the creation of processes 1,2, and mountroot, etc. 181 */ 182 void 183 cpu_startup() 184 { 185 caddr_t v; 186 int sz, i; 187 vm_size_t size; 188 int base, residual; 189 vm_offset_t minaddr, maxaddr; 190 char pbuf[9]; 191 192 /* 193 * Initialize message buffer (for kernel printf). 194 * This is put in physical page zero so it will 195 * always be in the same place after a reboot. 196 * Its mapping was prepared in pmap_bootstrap(). 197 * Also, offset some to avoid PROM scribbles. 198 */ 199 v = (caddr_t) KERNBASE; 200 msgbufaddr = (caddr_t)(v + MSGBUFOFF); 201 initmsgbuf(msgbufaddr, MSGBUFSIZE); 202 203 /* 204 * Good {morning,afternoon,evening,night}. 205 */ 206 printf(version); 207 identifycpu(); 208 initfpu(); /* also prints FPU type */ 209 210 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 211 printf("total memory = %s\n", pbuf); 212 213 /* 214 * Find out how much space we need, allocate it, 215 * and then give everything true virtual addresses. 216 */ 217 sz = (int)allocsys(NULL, NULL); 218 if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(sz))) == 0) 219 panic("startup: no room for tables"); 220 if (allocsys(v, NULL) - v != sz) 221 panic("startup: table size inconsistency"); 222 223 /* 224 * Now allocate buffers proper. They are different than the above 225 * in that they usually occupy more virtual memory than physical. 226 */ 227 size = MAXBSIZE * nbuf; 228 if (uvm_map(kernel_map, (vm_offset_t *) &buffers, round_page(size), 229 NULL, UVM_UNKNOWN_OFFSET, 230 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 231 UVM_ADV_NORMAL, 0)) != KERN_SUCCESS) 232 panic("startup: cannot allocate VM for buffers"); 233 minaddr = (vm_offset_t)buffers; 234 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 235 /* don't want to alloc more physical mem than needed */ 236 bufpages = btoc(MAXBSIZE) * nbuf; 237 } 238 base = bufpages / nbuf; 239 residual = bufpages % nbuf; 240 for (i = 0; i < nbuf; i++) { 241 vm_size_t curbufsize; 242 vm_offset_t curbuf; 243 struct vm_page *pg; 244 245 /* 246 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 247 * that MAXBSIZE space, we allocate and map (base+1) pages 248 * for the first "residual" buffers, and then we allocate 249 * "base" pages for the rest. 250 */ 251 curbuf = (vm_offset_t) buffers + (i * MAXBSIZE); 252 curbufsize = CLBYTES * ((i < residual) ? (base+1) : base); 253 254 while (curbufsize) { 255 pg = uvm_pagealloc(NULL, 0, NULL, 0); 256 if (pg == NULL) 257 panic("cpu_startup: not enough memory for " 258 "buffer cache"); 259 #if defined(PMAP_NEW) 260 pmap_kenter_pgs(curbuf, &pg, 1); 261 #else 262 pmap_enter(kernel_map->pmap, curbuf, 263 VM_PAGE_TO_PHYS(pg), VM_PROT_READ|VM_PROT_WRITE, 264 TRUE, VM_PROT_READ|VM_PROT_WRITE); 265 #endif 266 curbuf += PAGE_SIZE; 267 curbufsize -= PAGE_SIZE; 268 } 269 } 270 271 /* 272 * Allocate a submap for exec arguments. This map effectively 273 * limits the number of processes exec'ing at any time. 274 */ 275 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 276 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 277 278 /* 279 * We don't use a submap for physio, and use a separate map 280 * for DVMA allocations. Our vmapbuf just maps pages into 281 * the kernel map (any kernel mapping is OK) and then the 282 * device drivers clone the kernel mappings into DVMA space. 283 */ 284 285 /* 286 * Finally, allocate mbuf cluster submap. 287 */ 288 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 289 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 290 FALSE, NULL); 291 292 /* 293 * Initialize callouts 294 */ 295 callfree = callout; 296 for (i = 1; i < ncallout; i++) 297 callout[i-1].c_next = &callout[i]; 298 callout[i-1].c_next = NULL; 299 300 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 301 printf("avail memory = %s\n", pbuf); 302 format_bytes(pbuf, sizeof(pbuf), bufpages * CLBYTES); 303 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 304 305 /* 306 * Tell the VM system that writing to kernel text isn't allowed. 307 * If we don't, we might end up COW'ing the text segment! 308 */ 309 if (uvm_map_protect(kernel_map, (vm_offset_t) kernel_text, 310 m68k_trunc_page((vm_offset_t) etext), 311 UVM_PROT_READ|UVM_PROT_EXEC, TRUE) != KERN_SUCCESS) 312 panic("can't protect kernel text"); 313 314 /* 315 * Allocate a virtual page (for use by /dev/mem) 316 * This page is handed to pmap_enter() therefore 317 * it has to be in the normal kernel VA range. 318 */ 319 vmmap = uvm_km_valloc_wait(kernel_map, NBPG); 320 321 /* 322 * Create the DVMA maps. 323 */ 324 dvma_init(); 325 326 /* 327 * Set up CPU-specific registers, cache, etc. 328 */ 329 initcpu(); 330 331 /* 332 * Set up buffers, so they can be used to read disk labels. 333 */ 334 bufinit(); 335 } 336 337 /* 338 * Set registers on exec. 339 */ 340 void 341 setregs(p, pack, stack) 342 struct proc *p; 343 struct exec_package *pack; 344 u_long stack; 345 { 346 struct trapframe *tf = (struct trapframe *)p->p_md.md_regs; 347 348 tf->tf_sr = PSL_USERSET; 349 tf->tf_pc = pack->ep_entry & ~1; 350 tf->tf_regs[D0] = 0; 351 tf->tf_regs[D1] = 0; 352 tf->tf_regs[D2] = 0; 353 tf->tf_regs[D3] = 0; 354 tf->tf_regs[D4] = 0; 355 tf->tf_regs[D5] = 0; 356 tf->tf_regs[D6] = 0; 357 tf->tf_regs[D7] = 0; 358 tf->tf_regs[A0] = 0; 359 tf->tf_regs[A1] = 0; 360 tf->tf_regs[A2] = (int)PS_STRINGS; 361 tf->tf_regs[A3] = 0; 362 tf->tf_regs[A4] = 0; 363 tf->tf_regs[A5] = 0; 364 tf->tf_regs[A6] = 0; 365 tf->tf_regs[SP] = stack; 366 367 /* restore a null state frame */ 368 p->p_addr->u_pcb.pcb_fpregs.fpf_null = 0; 369 if (fputype) 370 m68881_restore(&p->p_addr->u_pcb.pcb_fpregs); 371 372 p->p_md.md_flags = 0; 373 } 374 375 /* 376 * Info for CTL_HW 377 */ 378 char machine[16] = MACHINE; /* from <machine/param.h> */ 379 char kernel_arch[16] = "sun3x"; /* XXX needs a sysctl node */ 380 char cpu_model[120]; 381 382 /* 383 * XXX - Should empirically estimate the divisor... 384 * Note that the value of delay_divisor is roughly 385 * 2048 / cpuclock (where cpuclock is in MHz). 386 */ 387 int delay_divisor = 62; /* assume the fastest (33 MHz) */ 388 389 void 390 identifycpu() 391 { 392 u_char machtype; 393 394 machtype = identity_prom.idp_machtype; 395 if ((machtype & IDM_ARCH_MASK) != IDM_ARCH_SUN3X) { 396 printf("Bad IDPROM arch!\n"); 397 sunmon_abort(); 398 } 399 400 cpu_machine_id = machtype; 401 switch (cpu_machine_id) { 402 403 case SUN3X_MACH_80: 404 cpu_string = "80"; /* Hydra */ 405 delay_divisor = 102; /* 20 MHz */ 406 cpu_has_vme = FALSE; 407 break; 408 409 case SUN3X_MACH_470: 410 cpu_string = "470"; /* Pegasus */ 411 delay_divisor = 62; /* 33 MHz */ 412 cpu_has_vme = TRUE; 413 break; 414 415 default: 416 printf("unknown sun3x model\n"); 417 sunmon_abort(); 418 } 419 420 /* Other stuff? (VAC, mc6888x version, etc.) */ 421 /* Note: miniroot cares about the kernel_arch part. */ 422 sprintf(cpu_model, "%s %s", kernel_arch, cpu_string); 423 424 printf("Model: %s\n", cpu_model); 425 } 426 427 /* 428 * machine dependent system variables. 429 */ 430 int 431 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 432 int *name; 433 u_int namelen; 434 void *oldp; 435 size_t *oldlenp; 436 void *newp; 437 size_t newlen; 438 struct proc *p; 439 { 440 int error; 441 dev_t consdev; 442 443 /* all sysctl names at this level are terminal */ 444 if (namelen != 1) 445 return (ENOTDIR); /* overloaded */ 446 447 switch (name[0]) { 448 case CPU_CONSDEV: 449 if (cn_tab != NULL) 450 consdev = cn_tab->cn_dev; 451 else 452 consdev = NODEV; 453 error = sysctl_rdstruct(oldp, oldlenp, newp, 454 &consdev, sizeof consdev); 455 break; 456 457 #if 0 /* XXX - Not yet... */ 458 case CPU_ROOT_DEVICE: 459 error = sysctl_rdstring(oldp, oldlenp, newp, root_device); 460 break; 461 462 case CPU_BOOTED_KERNEL: 463 error = sysctl_rdstring(oldp, oldlenp, newp, booted_kernel); 464 break; 465 #endif 466 467 default: 468 error = EOPNOTSUPP; 469 } 470 return (error); 471 } 472 473 /* See: sig_machdep.c */ 474 475 /* 476 * Do a sync in preparation for a reboot. 477 * XXX - This could probably be common code. 478 * XXX - And now, most of it is in vfs_shutdown() 479 * XXX - Put waittime checks in there too? 480 */ 481 int waittime = -1; /* XXX - Who else looks at this? -gwr */ 482 static void 483 reboot_sync __P((void)) 484 { 485 486 /* Check waittime here to localize its use to this function. */ 487 if (waittime >= 0) 488 return; 489 waittime = 0; 490 vfs_shutdown(); 491 } 492 493 /* 494 * Common part of the BSD and SunOS reboot system calls. 495 */ 496 __dead void 497 cpu_reboot(howto, user_boot_string) 498 int howto; 499 char *user_boot_string; 500 { 501 /* Note: this string MUST be static! */ 502 static char bootstr[128]; 503 char *p; 504 505 /* If system is cold, just halt. (early panic?) */ 506 if (cold) 507 goto haltsys; 508 509 /* Un-blank the screen if appropriate. */ 510 cnpollc(1); 511 512 if ((howto & RB_NOSYNC) == 0) { 513 reboot_sync(); 514 /* 515 * If we've been adjusting the clock, the todr 516 * will be out of synch; adjust it now. 517 * 518 * XXX - However, if the kernel has been sitting in ddb, 519 * the time will be way off, so don't set the HW clock! 520 * XXX - Should do sanity check against HW clock. -gwr 521 */ 522 /* resettodr(); */ 523 } 524 525 /* Disable interrupts. */ 526 splhigh(); 527 528 /* Write out a crash dump if asked. */ 529 if (howto & RB_DUMP) 530 dumpsys(); 531 532 /* run any shutdown hooks */ 533 doshutdownhooks(); 534 535 if (howto & RB_HALT) { 536 haltsys: 537 printf("Kernel halted.\n"); 538 #if 0 539 /* 540 * This calls the PROM monitor "exit_to_mon" function 541 * which appears to have problems... SunOS uses the 542 * "abort" function when you halt (bug work-around?) 543 * so we might as well do the same. 544 */ 545 sunmon_halt(); /* provokes PROM monitor bug */ 546 #else 547 sunmon_abort(); 548 #endif 549 } 550 551 /* 552 * Automatic reboot. 553 */ 554 if (user_boot_string) 555 strncpy(bootstr, user_boot_string, sizeof(bootstr)); 556 else { 557 /* 558 * Build our own boot string with an empty 559 * boot device/file and (maybe) some flags. 560 * The PROM will supply the device/file name. 561 */ 562 p = bootstr; 563 *p = '\0'; 564 if (howto & (RB_KDB|RB_ASKNAME|RB_SINGLE)) { 565 /* Append the boot flags. */ 566 *p++ = ' '; 567 *p++ = '-'; 568 if (howto & RB_KDB) 569 *p++ = 'd'; 570 if (howto & RB_ASKNAME) 571 *p++ = 'a'; 572 if (howto & RB_SINGLE) 573 *p++ = 's'; 574 *p = '\0'; 575 } 576 } 577 printf("Kernel rebooting...\n"); 578 sunmon_reboot(bootstr); 579 for (;;) ; 580 /*NOTREACHED*/ 581 } 582 583 /* 584 * These variables are needed by /sbin/savecore 585 */ 586 u_long dumpmag = 0x8fca0101; /* magic number */ 587 int dumpsize = 0; /* pages */ 588 long dumplo = 0; /* blocks */ 589 590 /* 591 * This is called by main to set dumplo, dumpsize. 592 * Dumps always skip the first CLBYTES of disk space 593 * in case there might be a disk label stored there. 594 * If there is extra space, put dump at the end to 595 * reduce the chance that swapping trashes it. 596 */ 597 void 598 cpu_dumpconf() 599 { 600 int nblks; /* size of dump area */ 601 int maj; 602 int (*getsize)__P((dev_t)); 603 604 /* Validate space in page zero for the kcore header. */ 605 if (MSGBUFOFF < (sizeof(kcore_seg_t) + sizeof(cpu_kcore_hdr_t))) 606 panic("cpu_dumpconf: MSGBUFOFF too small"); 607 608 if (dumpdev == NODEV) 609 return; 610 611 maj = major(dumpdev); 612 if (maj < 0 || maj >= nblkdev) 613 panic("dumpconf: bad dumpdev=0x%x", dumpdev); 614 getsize = bdevsw[maj].d_psize; 615 if (getsize == NULL) 616 return; 617 nblks = (*getsize)(dumpdev); 618 if (nblks <= ctod(1)) 619 return; 620 621 /* Position dump image near end of space, page aligned. */ 622 dumpsize = physmem; /* pages */ 623 dumplo = nblks - ctod(dumpsize); 624 dumplo &= ~(ctod(1)-1); 625 626 /* If it does not fit, truncate it by moving dumplo. */ 627 /* Note: Must force signed comparison. */ 628 if (dumplo < ((long)ctod(1))) { 629 dumplo = ctod(1); 630 dumpsize = dtoc(nblks - dumplo); 631 } 632 } 633 634 /* Note: gdb looks for "dumppcb" in a kernel crash dump. */ 635 struct pcb dumppcb; 636 637 /* 638 * Write a crash dump. The format while in swap is: 639 * kcore_seg_t cpu_hdr; 640 * cpu_kcore_hdr_t cpu_data; 641 * padding (NBPG-sizeof(kcore_seg_t)) 642 * pagemap (2*NBPG) 643 * physical memory... 644 */ 645 void 646 dumpsys() 647 { 648 struct bdevsw *dsw; 649 kcore_seg_t *kseg_p; 650 cpu_kcore_hdr_t *chdr_p; 651 struct sun3x_kcore_hdr *sh; 652 phys_ram_seg_t *crs_p; 653 char *vaddr; 654 vm_offset_t paddr; 655 int psize, todo, seg, segsz; 656 daddr_t blkno; 657 int error = 0; 658 659 msgbufenabled = 0; 660 if (dumpdev == NODEV) 661 return; 662 663 /* 664 * For dumps during autoconfiguration, 665 * if dump device has already configured... 666 */ 667 if (dumpsize == 0) 668 cpu_dumpconf(); 669 if (dumplo <= 0) { 670 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 671 minor(dumpdev)); 672 return; 673 } 674 savectx(&dumppcb); 675 676 dsw = &bdevsw[major(dumpdev)]; 677 psize = (*(dsw->d_psize))(dumpdev); 678 if (psize == -1) { 679 printf("dump area unavailable\n"); 680 return; 681 } 682 683 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 684 minor(dumpdev), dumplo); 685 686 /* 687 * We put the dump header is in physical page zero, 688 * so there is no extra work here to write it out. 689 * All we do is initialize the header. 690 */ 691 692 /* Set pointers to all three parts. */ 693 kseg_p = (kcore_seg_t *)KERNBASE; 694 chdr_p = (cpu_kcore_hdr_t *) (kseg_p + 1); 695 sh = &chdr_p->un._sun3x; 696 697 /* Fill in kcore_seg_t part. */ 698 CORE_SETMAGIC(*kseg_p, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 699 kseg_p->c_size = sizeof(*chdr_p); 700 701 /* Fill in cpu_kcore_hdr_t part. */ 702 strncpy(chdr_p->name, kernel_arch, sizeof(chdr_p->name)); 703 chdr_p->page_size = NBPG; 704 chdr_p->kernbase = KERNBASE; 705 706 /* Fill in the sun3x_kcore_hdr part. */ 707 pmap_kcore_hdr(sh); 708 709 /* 710 * Now dump physical memory. Note that physical memory 711 * might NOT be congiguous, so do it by segments. 712 */ 713 714 blkno = dumplo; 715 todo = dumpsize; /* pages */ 716 vaddr = (char*)vmmap; /* Borrow /dev/mem VA */ 717 718 for (seg = 0; seg < SUN3X_NPHYS_RAM_SEGS; seg++) { 719 crs_p = &sh->ram_segs[seg]; 720 paddr = crs_p->start; 721 segsz = crs_p->size; 722 /* 723 * Our header lives in the first little bit of 724 * physical memory (not written separately), so 725 * we have to adjust the first ram segment size 726 * and start address to reflect the stolen RAM. 727 * (Nothing interesing in that RAM anyway 8^). 728 */ 729 if (seg == 0) { 730 int adj = sizeof(*kseg_p) + sizeof(*chdr_p); 731 crs_p->start += adj; 732 crs_p->size -= adj; 733 } 734 735 while (todo && (segsz > 0)) { 736 737 /* Print pages left after every 16. */ 738 if ((todo & 0xf) == 0) 739 printf("\r%4d", todo); 740 741 /* Make a temporary mapping for the page. */ 742 pmap_enter(pmap_kernel(), vmmap, paddr | PMAP_NC, 743 VM_PROT_READ, FALSE, 0); 744 error = (*dsw->d_dump)(dumpdev, blkno, vaddr, NBPG); 745 pmap_remove(pmap_kernel(), vmmap, vmmap + NBPG); 746 if (error) 747 goto fail; 748 paddr += NBPG; 749 segsz -= NBPG; 750 blkno += btodb(NBPG); 751 todo--; 752 } 753 } 754 printf("\rdump succeeded\n"); 755 return; 756 fail: 757 printf(" dump error=%d\n", error); 758 } 759 760 static void 761 initcpu() 762 { 763 /* XXX: Enable RAM parity/ECC checking? */ 764 /* XXX: parityenable(); */ 765 766 #ifdef HAVECACHE 767 cache_enable(); 768 #endif 769 } 770 771 /* straptrap() in trap.c */ 772 773 /* from hp300: badaddr() */ 774 /* peek_byte(), peek_word() moved to bus_subr.c */ 775 776 /* XXX: parityenable() ? */ 777 /* regdump() moved to regdump.c */ 778 779 /* 780 * cpu_exec_aout_makecmds(): 781 * cpu-dependent a.out format hook for execve(). 782 * 783 * Determine if the given exec package refers to something which we 784 * understand and, if so, set up the vmcmds for it. 785 */ 786 int 787 cpu_exec_aout_makecmds(p, epp) 788 struct proc *p; 789 struct exec_package *epp; 790 { 791 return ENOEXEC; 792 } 793
Indexes created Sat Sep 27 14:09:57 GMT 2025