1 /* 2 * Copyright (c) 1992 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratories. 13 * 14 * %sccs.include.redist.c% 15 * 16 * @(#)machdep.c 7.2 (Berkeley) 07/21/92 17 * 18 * from: $Header: machdep.c,v 1.32 92/07/13 01:41:14 torek Exp $ 19 */ 20 21 #include "param.h" 22 #include "proc.h" 23 #include "user.h" 24 #include "map.h" 25 #include "buf.h" 26 #include "device.h" 27 #include "reboot.h" 28 #include "systm.h" 29 #include "conf.h" 30 #include "file.h" 31 #include "clist.h" 32 #include "callout.h" 33 #include "malloc.h" 34 #include "mbuf.h" 35 #include "mount.h" 36 #include "msgbuf.h" 37 #ifdef SYSVSHM 38 #include "shm.h" 39 #endif 40 #include "exec.h" 41 42 #include "machine/autoconf.h" 43 #include "machine/frame.h" 44 #include "machine/cpu.h" 45 46 #include "vm/vm_kern.h" 47 #include "vm/vm_page.h" 48 49 #include "asm.h" 50 #include "cache.h" 51 #include "vaddrs.h" 52 53 vm_map_t buffer_map; 54 extern vm_offset_t avail_end; 55 56 /* 57 * Declare these as initialized data so we can patch them. 58 */ 59 int nswbuf = 0; 60 #ifdef NBUF 61 int nbuf = NBUF; 62 #else 63 int nbuf = 0; 64 #endif 65 #ifdef BUFPAGES 66 int bufpages = BUFPAGES; 67 #else 68 int bufpages = 0; 69 #endif 70 71 int physmem; 72 73 extern struct msgbuf msgbuf; 74 struct msgbuf *msgbufp = &msgbuf; 75 int msgbufmapped = 1; /* message buffer is always mapped */ 76 77 /* 78 * safepri is a safe priority for sleep to set for a spin-wait 79 * during autoconfiguration or after a panic. 80 */ 81 int safepri = 0; 82 83 caddr_t allocsys(); 84 85 /* 86 * Machine-dependent startup code 87 */ 88 cpu_startup() 89 { 90 register unsigned i; 91 register caddr_t v; 92 register int sz; 93 int base, residual; 94 #ifdef DEBUG 95 extern int pmapdebug; 96 int opmapdebug = pmapdebug; 97 #endif 98 vm_offset_t minaddr, maxaddr; 99 vm_size_t size; 100 101 #ifdef DEBUG 102 pmapdebug = 0; 103 #endif 104 105 /* 106 * Good {morning,afternoon,evening,night}. 107 */ 108 printf(version); 109 /*identifycpu();*/ 110 physmem = btoc(avail_end); 111 printf("real mem = %d\n", avail_end); 112 113 /* 114 * Find out how much space we need, allocate it, 115 * and then give everything true virtual addresses. 116 */ 117 sz = (int)allocsys((caddr_t)0); 118 if ((v = (caddr_t)kmem_alloc(kernel_map, round_page(sz))) == 0) 119 panic("startup: no room for tables"); 120 if (allocsys(v) - v != sz) 121 panic("startup: table size inconsistency"); 122 123 /* 124 * Now allocate buffers proper. They are different than the above 125 * in that they usually occupy more virtual memory than physical. 126 */ 127 size = MAXBSIZE * nbuf; 128 buffer_map = kmem_suballoc(kernel_map, (vm_offset_t *)&buffers, 129 &maxaddr, size, FALSE); 130 minaddr = (vm_offset_t)buffers; 131 if (vm_map_find(buffer_map, vm_object_allocate(size), (vm_offset_t)0, 132 &minaddr, size, FALSE) != KERN_SUCCESS) 133 panic("startup: cannot allocate buffers"); 134 base = bufpages / nbuf; 135 residual = bufpages % nbuf; 136 for (i = 0; i < nbuf; i++) { 137 vm_size_t curbufsize; 138 vm_offset_t curbuf; 139 140 /* 141 * First <residual> buffers get (base+1) physical pages 142 * allocated for them. The rest get (base) physical pages. 143 * 144 * The rest of each buffer occupies virtual space, 145 * but has no physical memory allocated for it. 146 */ 147 curbuf = (vm_offset_t)buffers + i * MAXBSIZE; 148 curbufsize = CLBYTES * (i < residual ? base+1 : base); 149 vm_map_pageable(buffer_map, curbuf, curbuf+curbufsize, FALSE); 150 vm_map_simplify(buffer_map, curbuf); 151 } 152 /* 153 * Allocate a submap for exec arguments. This map effectively 154 * limits the number of processes exec'ing at any time. 155 */ 156 exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 157 16*NCARGS, TRUE); 158 /* 159 * Allocate a map for physio. Others use a submap of the kernel 160 * map, but we want one completely separate, even though it uses 161 * the same pmap. 162 */ 163 phys_map = vm_map_create(kernel_pmap, DVMA_BASE, DVMA_END, 1); 164 if (phys_map == NULL) 165 panic("unable to create DVMA map"); 166 167 /* 168 * Finally, allocate mbuf pool. Since mclrefcnt is an off-size 169 * we use the more space efficient malloc in place of kmem_alloc. 170 */ 171 mclrefcnt = (char *)malloc(NMBCLUSTERS+CLBYTES/MCLBYTES, 172 M_MBUF, M_NOWAIT); 173 bzero(mclrefcnt, NMBCLUSTERS+CLBYTES/MCLBYTES); 174 mb_map = kmem_suballoc(kernel_map, (vm_offset_t *)&mbutl, &maxaddr, 175 VM_MBUF_SIZE, FALSE); 176 /* 177 * Initialize callouts 178 */ 179 callfree = callout; 180 for (i = 1; i < ncallout; i++) 181 callout[i-1].c_next = &callout[i]; 182 callout[i-1].c_next = NULL; 183 184 #ifdef DEBUG 185 pmapdebug = opmapdebug; 186 #endif 187 printf("avail mem = %d\n", ptoa(cnt.v_free_count)); 188 printf("using %d buffers containing %d bytes of memory\n", 189 nbuf, bufpages * CLBYTES); 190 191 /* 192 * Set up buffers, so they can be used to read disk labels. 193 */ 194 bufinit(); 195 196 /* 197 * Configure the system. 198 */ 199 configure(); 200 201 /* 202 * Turn on the cache (do after configuration due to a bug in 203 * some versions of the SPARC chips -- this info from Gilmore). 204 */ 205 cache_enable(); 206 } 207 208 /* 209 * Allocate space for system data structures. We are given 210 * a starting virtual address and we return a final virtual 211 * address; along the way we set each data structure pointer. 212 * 213 * You call allocsys() with 0 to find out how much space we want, 214 * allocate that much and fill it with zeroes, and then call 215 * allocsys() again with the correct base virtual address. 216 */ 217 caddr_t 218 allocsys(v) 219 register caddr_t v; 220 { 221 222 #define valloc(name, type, num) \ 223 v = (caddr_t)(((name) = (type *)v) + (num)) 224 valloc(cfree, struct cblock, nclist); 225 valloc(callout, struct callout, ncallout); 226 valloc(swapmap, struct map, nswapmap = maxproc * 2); 227 #ifdef SYSVSHM 228 valloc(shmsegs, struct shmid_ds, shminfo.shmmni); 229 #endif 230 231 /* 232 * Determine how many buffers to allocate (enough to 233 * hold 5% of total physical memory, but at least 16). 234 * Allocate 1/2 as many swap buffer headers as file i/o buffers. 235 */ 236 if (bufpages == 0) 237 bufpages = (physmem / 20) / CLSIZE; 238 if (nbuf == 0) { 239 nbuf = bufpages; 240 if (nbuf < 16) 241 nbuf = 16; 242 } 243 if (nswbuf == 0) { 244 nswbuf = (nbuf / 2) &~ 1; /* force even */ 245 if (nswbuf > 256) 246 nswbuf = 256; /* sanity */ 247 } 248 valloc(swbuf, struct buf, nswbuf); 249 valloc(buf, struct buf, nbuf); 250 return (v); 251 } 252 253 /* 254 * Set up registers on exec. 255 * 256 * XXX this entire mess must be fixed 257 */ 258 /* ARGSUSED */ 259 setregs(p, entry, retval) 260 register struct proc *p; 261 u_long entry; 262 int retval[2]; 263 { 264 register struct trapframe *tf = p->p_md.md_tf; 265 register struct fpstate *fs; 266 register int psr, sp; 267 268 /* 269 * The syscall will ``return'' to npc or %g7 or %g2; set them all. 270 * Set the rest of the registers to 0 except for %o6 (stack pointer, 271 * built in exec()) and psr (retain CWP and PSR_S bits). 272 */ 273 psr = tf->tf_psr & (PSR_S | PSR_CWP); 274 sp = tf->tf_out[6]; 275 if ((fs = p->p_md.md_fpstate) != NULL) { 276 /* 277 * We hold an FPU state. If we own *the* FPU chip state 278 * we must get rid of it, and the only way to do that is 279 * to save it. In any case, get rid of our FPU state. 280 */ 281 if (p == fpproc) { 282 savefpstate(fs); 283 fpproc = NULL; 284 } 285 free((void *)fs, M_SUBPROC); 286 p->p_md.md_fpstate = NULL; 287 } 288 bzero((caddr_t)tf, sizeof *tf); 289 tf->tf_psr = psr; 290 tf->tf_global[2] = tf->tf_global[7] = tf->tf_npc = entry & ~3; 291 tf->tf_out[6] = sp; 292 retval[1] = 0; 293 } 294 295 #ifdef DEBUG 296 int sigdebug = 0; 297 int sigpid = 0; 298 #define SDB_FOLLOW 0x01 299 #define SDB_KSTACK 0x02 300 #define SDB_FPSTATE 0x04 301 #endif 302 303 struct sigframe { 304 int sf_signo; /* signal number */ 305 int sf_code; /* code */ 306 #ifdef COMPAT_SUNOS 307 struct sigcontext *sf_scp; /* points to user addr of sigcontext */ 308 #else 309 int sf_xxx; /* placeholder */ 310 #endif 311 int sf_addr; /* SunOS compat, always 0 for now */ 312 struct sigcontext sf_sc; /* actual sigcontext */ 313 }; 314 315 /* 316 * Send an interrupt to process. 317 */ 318 void 319 sendsig(catcher, sig, mask, code) 320 sig_t catcher; 321 int sig, mask; 322 unsigned code; 323 { 324 register struct proc *p = curproc; 325 register struct sigacts *psp = p->p_sigacts; 326 register struct sigframe *fp; 327 register struct trapframe *tf; 328 register int addr, oonstack; 329 struct sigframe sf; 330 extern char sigcode[], esigcode[]; 331 #define szsigcode (esigcode - sigcode) 332 333 tf = p->p_md.md_tf; 334 oonstack = psp->ps_sigstk.ss_flags & SA_ONSTACK; 335 /* 336 * Compute new user stack addresses, subtract off 337 * one signal frame, and align. 338 */ 339 if ((psp->ps_flags & SAS_ALTSTACK) && !oonstack && 340 (psp->ps_sigonstack & sigmask(sig))) { 341 fp = (struct sigframe *)(psp->ps_sigstk.ss_base + 342 psp->ps_sigstk.ss_size); 343 psp->ps_sigstk.ss_flags |= SA_ONSTACK; 344 } else 345 fp = (struct sigframe *)tf->tf_out[6]; 346 fp = (struct sigframe *)((int)(fp - 1) & ~7); 347 348 #ifdef DEBUG 349 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 350 printf("sendsig: %s[%d] sig %d newusp %x scp %x\n", 351 p->p_comm, p->p_pid, sig, fp, &fp->sf_sc); 352 #endif 353 /* 354 * Now set up the signal frame. We build it in kernel space 355 * and then copy it out. We probably ought to just build it 356 * directly in user space.... 357 */ 358 sf.sf_signo = sig; 359 sf.sf_code = code; 360 #ifdef COMPAT_SUNOS 361 sf.sf_scp = &fp->sf_sc; 362 #endif 363 sf.sf_addr = 0; /* XXX */ 364 365 /* 366 * Build the signal context to be used by sigreturn. 367 */ 368 sf.sf_sc.sc_onstack = oonstack; 369 sf.sf_sc.sc_mask = mask; 370 sf.sf_sc.sc_sp = tf->tf_out[6]; 371 sf.sf_sc.sc_pc = tf->tf_pc; 372 sf.sf_sc.sc_npc = tf->tf_npc; 373 sf.sf_sc.sc_psr = tf->tf_psr; 374 sf.sf_sc.sc_g1 = tf->tf_global[1]; 375 sf.sf_sc.sc_o0 = tf->tf_out[0]; 376 377 /* 378 * Put the stack in a consistent state before we whack away 379 * at it. Note that write_user_windows may just dump the 380 * registers into the pcb; we need them in the process's memory. 381 */ 382 write_user_windows(); 383 if (rwindow_save(p) || copyout((caddr_t)&sf, (caddr_t)fp, sizeof sf)) { 384 /* 385 * Process has trashed its stack; give it an illegal 386 * instruction to halt it in its tracks. 387 */ 388 #ifdef DEBUG 389 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 390 printf("sendsig: window save or copyout error\n"); 391 #endif 392 sigexit(p, SIGILL); 393 /* NOTREACHED */ 394 } 395 #ifdef DEBUG 396 if (sigdebug & SDB_FOLLOW) 397 printf("sendsig: %s[%d] sig %d scp %x\n", 398 p->p_comm, p->p_pid, sig, &fp->sf_sc); 399 #endif 400 /* 401 * Arrange to continue execution at the code copied out in exec(). 402 * It needs the function to call in %g1, and a new stack pointer. 403 */ 404 #ifdef COMPAT_SUNOS 405 if (psp->ps_usertramp & sigmask(sig)) { 406 addr = (int)catcher; /* user does his own trampolining */ 407 } else 408 #endif 409 { 410 addr = USRSTACK - sizeof(struct ps_strings) - szsigcode; 411 tf->tf_global[1] = (int)catcher; 412 } 413 tf->tf_pc = addr; 414 tf->tf_npc = addr + 4; 415 tf->tf_out[6] = (int)fp - sizeof(struct rwindow); 416 #ifdef DEBUG 417 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 418 printf("sendsig: about to return to catcher\n"); 419 #endif 420 } 421 422 /* 423 * System call to cleanup state after a signal 424 * has been taken. Reset signal mask and 425 * stack state from context left by sendsig (above), 426 * and return to the given trap frame (if there is one). 427 * Check carefully to make sure that the user has not 428 * modified the state to gain improper privileges or to cause 429 * a machine fault. 430 */ 431 /* ARGSUSED */ 432 struct sigreturn_args { 433 struct sigcontext *scp; 434 }; 435 sigreturn(p, uap, retval) 436 register struct proc *p; 437 struct sigreturn_args *uap; 438 int *retval; 439 { 440 register struct sigcontext *scp; 441 register struct trapframe *tf; 442 443 /* First ensure consistent stack state (see sendsig). */ 444 write_user_windows(); 445 if (rwindow_save(p)) 446 sigexit(p, SIGILL); 447 #ifdef DEBUG 448 if (sigdebug & SDB_FOLLOW) 449 printf("sigreturn: %s[%d], scp %x\n", 450 p->p_comm, p->p_pid, uap->scp); 451 #endif 452 scp = uap->scp; 453 if ((int)scp & 3 || useracc((caddr_t)scp, sizeof *scp, B_WRITE) == 0) 454 return (EINVAL); 455 tf = p->p_md.md_tf; 456 /* 457 * Only the icc bits in the psr are used, so it need not be 458 * verified. pc and npc must be multiples of 4. This is all 459 * that is required; if it holds, just do it. 460 */ 461 if (((scp->sc_pc | scp->sc_npc) & 3) != 0) 462 return (EINVAL); 463 /* take only psr ICC field */ 464 tf->tf_psr = (tf->tf_psr & ~PSR_ICC) | (scp->sc_psr & PSR_ICC); 465 tf->tf_pc = scp->sc_pc; 466 tf->tf_npc = scp->sc_npc; 467 tf->tf_global[1] = scp->sc_g1; 468 tf->tf_out[0] = scp->sc_o0; 469 tf->tf_out[6] = scp->sc_sp; 470 if (scp->sc_onstack & 1) 471 p->p_sigacts->ps_sigstk.ss_flags |= SA_ONSTACK; 472 else 473 p->p_sigacts->ps_sigstk.ss_flags &= ~SA_ONSTACK; 474 p->p_sigmask = scp->sc_mask & ~sigcantmask; 475 return (EJUSTRETURN); 476 } 477 478 int waittime = -1; 479 480 boot(howto) 481 register int howto; 482 { 483 int i; 484 static char str[4]; /* room for "-sd\0" */ 485 extern volatile void romhalt(void); 486 extern volatile void romboot(char *); 487 488 fb_unblank(); 489 boothowto = howto; 490 if ((howto & RB_NOSYNC) == 0 && waittime < 0 && rootfs) { 491 register struct buf *bp; 492 int iter, nbusy; 493 #if 1 494 extern struct proc proc0; 495 496 /* protect against curproc->p_stats.foo refs in sync() XXX */ 497 if (curproc == NULL) 498 curproc = &proc0; 499 #endif 500 waittime = 0; 501 (void) spl0(); 502 printf("syncing disks... "); 503 /* 504 * Release vnodes held by texts before sync. 505 */ 506 if (panicstr == 0) 507 vnode_pager_umount((struct mount *)NULL); 508 #include "fd.h" 509 #if NFD > 0 510 fdshutdown(); 511 #endif 512 sync((struct proc *)NULL, (void *)NULL, (int *)NULL); 513 514 for (iter = 0; iter < 20; iter++) { 515 nbusy = 0; 516 for (bp = &buf[nbuf]; --bp >= buf; ) 517 if ((bp->b_flags & (B_BUSY|B_INVAL)) == B_BUSY) 518 nbusy++; 519 if (nbusy == 0) 520 break; 521 printf("%d ", nbusy); 522 DELAY(40000 * iter); 523 } 524 if (nbusy) 525 printf("giving up\n"); 526 else 527 printf("done\n"); 528 /* 529 * If we've been adjusting the clock, the todr 530 * will be out of synch; adjust it now. 531 */ 532 resettodr(); 533 } 534 (void) splhigh(); /* ??? */ 535 if (howto & RB_HALT) { 536 printf("halted\n\n"); 537 romhalt(); 538 } 539 if (howto & RB_DUMP) 540 dumpsys(); 541 printf("rebooting\n\n"); 542 i = 1; 543 if (howto & RB_SINGLE) 544 str[i++] = 's'; 545 if (howto & RB_KDB) 546 str[i++] = 'd'; 547 if (i > 1) { 548 str[0] = '-'; 549 str[i] = 0; 550 } else 551 str[0] = 0; 552 romboot(str); 553 /*NOTREACHED*/ 554 } 555 556 int dumpmag = 0x8fca0101; /* magic number for savecore */ 557 int dumpsize = 0; /* also for savecore */ 558 long dumplo = 0; 559 560 dumpconf() 561 { 562 int nblks; 563 564 dumpsize = physmem; 565 #define DUMPMMU 566 #ifdef DUMPMMU 567 #define NPMEG 128 568 /* 569 * savecore views the image in units of pages (i.e., dumpsize is in 570 * pages) so we round the two mmu entities into page-sized chunks. 571 * The PMEGs (32kB) and the segment table (512 bytes plus padding) 572 * are appending to the end of the crash dump. 573 */ 574 dumpsize += btoc(sizeof(((struct kpmap *)0)->pm_rsegmap)) + 575 btoc(NPMEG * NPTESG * sizeof(int)); 576 #endif 577 if (dumpdev != NODEV && bdevsw[major(dumpdev)].d_psize) { 578 nblks = (*bdevsw[major(dumpdev)].d_psize)(dumpdev); 579 /* 580 * Don't dump on the first CLBYTES (why CLBYTES?) 581 * in case the dump device includes a disk label. 582 */ 583 if (dumplo < btodb(CLBYTES)) 584 dumplo = btodb(CLBYTES); 585 586 /* 587 * If dumpsize is too big for the partition, truncate it. 588 * Otherwise, put the dump at the end of the partition 589 * by making dumplo as large as possible. 590 */ 591 if (dumpsize > btoc(dbtob(nblks - dumplo))) 592 dumpsize = btoc(dbtob(nblks - dumplo)); 593 else if (dumplo + ctod(dumpsize) > nblks) 594 dumplo = nblks - ctod(dumpsize); 595 } 596 } 597 598 #ifdef DUMPMMU 599 /* XXX */ 600 #include "ctlreg.h" 601 #define getpte(va) lda(va, ASI_PTE) 602 #define setsegmap(va, pmeg) stba(va, ASI_SEGMAP, pmeg) 603 604 /* 605 * Write the mmu contents to the dump device. 606 * This gets appended to the end of a crash dump since 607 * there is no in-core copy of kernel memory mappings. 608 */ 609 int 610 dumpmmu(blkno) 611 register daddr_t blkno; 612 { 613 register int (*dump)(/*dev_t, daddr_t, caddr_t, int*/); 614 register int pmeg; 615 register int addr; /* unused kernel virtual address */ 616 register int i; 617 register int *pte, *ptend; 618 register int error; 619 register struct kpmap *kpmap = &kernel_pmap_store; 620 int buffer[dbtob(1) / sizeof(int)]; 621 extern int seginval; /* from pmap.c */ 622 623 624 dump = bdevsw[major(dumpdev)].d_dump; 625 626 /* 627 * dump page table entries 628 * 629 * We dump each pmeg in order (by segment number). Since the MMU 630 * automatically maps the given virtual segment to a pmeg we must 631 * iterate over the segments by incrementing an unused segment slot 632 * in the MMU. This fixed segment number is used in the virtual 633 * address argument to getpte(). 634 */ 635 636 /* First find an unused virtual segment. */ 637 i = NKSEG; 638 while (kpmap->pm_rsegmap[--i] != seginval) 639 if (i <= 0) 640 return (-1); 641 /* 642 * Compute the base address corresponding to the unused segment. 643 * Note that the kernel segments start after all the user segments 644 * so we must account for this offset. 645 */ 646 addr = VSTOVA(i + NUSEG); 647 /* 648 * Go through the pmegs and dump each one. 649 */ 650 pte = buffer; 651 ptend = &buffer[sizeof(buffer) / sizeof(buffer[0])]; 652 for (pmeg = 0; pmeg < NPMEG; ++pmeg) { 653 register int va = addr; 654 655 setsegmap(addr, pmeg); 656 i = NPTESG; 657 do { 658 *pte++ = getpte(va); 659 if (pte >= ptend) { 660 /* 661 * Note that we'll dump the last block 662 * the last time through the loops because 663 * all the PMEGs occupy 32KB which is 664 * a multiple of the block size. 665 */ 666 error = (*dump)(dumpdev, blkno, 667 (caddr_t)buffer, 668 dbtob(1)); 669 if (error != 0) 670 return (error); 671 ++blkno; 672 pte = buffer; 673 } 674 va += NBPG; 675 } while (--i > 0); 676 } 677 setsegmap(addr, seginval); 678 679 /* 680 * dump (512 byte) segment map 681 * XXX assume it's a multiple of the block size 682 */ 683 error = (*dump)(dumpdev, blkno, (caddr_t)kpmap->pm_rsegmap, 684 sizeof(kpmap->pm_rsegmap), 0); 685 return (error); 686 } 687 #endif 688 689 #define BYTES_PER_DUMP (32 * 1024) /* must be a multiple of pagesize */ 690 static vm_offset_t dumpspace; 691 692 caddr_t 693 reserve_dumppages(p) 694 caddr_t p; 695 { 696 697 dumpspace = (vm_offset_t)p; 698 return (p + BYTES_PER_DUMP); 699 } 700 701 /* 702 * Write a crash dump. 703 */ 704 dumpsys() 705 { 706 register unsigned bytes, i, n; 707 register int maddr, psize; 708 register daddr_t blkno; 709 register int (*dump)(/*dev_t, daddr_t, caddr_t, int, int*/); 710 int error = 0; 711 712 if (dumpdev == NODEV) 713 return; 714 /* copy registers to memory */ 715 snapshot(cpcb); 716 /* 717 * For dumps during autoconfiguration, 718 * if dump device has already configured... 719 */ 720 if (dumpsize == 0) 721 dumpconf(); 722 if (dumplo < 0) 723 return; 724 printf("\ndumping to dev %x, offset %d\n", dumpdev, dumplo); 725 726 psize = (*bdevsw[major(dumpdev)].d_psize)(dumpdev); 727 printf("dump "); 728 if (psize == -1) { 729 printf("area unavailable\n"); 730 return; 731 } 732 bytes = physmem << PGSHIFT; 733 maddr = 0; 734 blkno = dumplo; 735 dump = bdevsw[major(dumpdev)].d_dump; 736 for (i = 0; i < bytes; i += n) { 737 n = bytes - i; 738 if (n > BYTES_PER_DUMP) 739 n = BYTES_PER_DUMP; 740 #ifdef DEBUG 741 /* print out how many MBs we have dumped */ 742 if (i && (i % (1024*1024)) == 0) 743 printf("%d ", i / (1024*1024)); 744 #endif 745 (void) pmap_map(dumpspace, maddr, maddr + n, VM_PROT_READ); 746 error = (*dump)(dumpdev, blkno, (caddr_t)dumpspace, (int)n); 747 if (error) 748 break; 749 maddr += n; 750 blkno += btodb(n); 751 } 752 #ifdef DUMPMMU 753 if (!error) 754 error = dumpmmu(blkno); 755 #endif 756 switch (error) { 757 758 case ENXIO: 759 printf("device bad\n"); 760 break; 761 762 case EFAULT: 763 printf("device not ready\n"); 764 break; 765 766 case EINVAL: 767 printf("area improper\n"); 768 break; 769 770 case EIO: 771 printf("i/o error\n"); 772 break; 773 774 case 0: 775 printf("succeeded\n"); 776 break; 777 778 default: 779 printf("error %d\n", error); 780 break; 781 } 782 } 783 784 /* 785 * Map an I/O device given physical address and size in bytes, e.g., 786 * 787 * mydev = (struct mydev *)mapdev(myioaddr, 0, sizeof(struct mydev)); 788 * 789 * See also machine/autoconf.h. 790 */ 791 void * 792 mapdev(phys, virt, size) 793 register void *phys; 794 register int virt, size; 795 { 796 register vm_offset_t v; 797 register void *ret; 798 static vm_offset_t iobase = IODEV_BASE; 799 800 size = round_page(size); 801 if (virt) 802 v = virt; 803 else { 804 v = iobase; 805 iobase += size; 806 if (iobase > IODEV_END) /* unlikely */ 807 panic("mapiodev"); 808 } 809 ret = (void *)v; 810 do { 811 pmap_enter(kernel_pmap, v, 812 (vm_offset_t)phys | PMAP_OBIO | PMAP_NC, 813 VM_PROT_READ | VM_PROT_WRITE, 1); 814 v += PAGE_SIZE; 815 phys += PAGE_SIZE; 816 } while ((size -= PAGE_SIZE) > 0); 817 return (ret); 818 } 819