1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. 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 Laboratory. 13 * 14 * %sccs.include.redist.c% 15 * 16 * @(#)machdep.c 8.1 (Berkeley) 06/11/93 17 * 18 * from: $Header: machdep.c,v 1.41 93/05/27 04:39:05 torek Exp $ 19 */ 20 21 #include <sys/param.h> 22 #include <sys/proc.h> 23 #include <sys/user.h> 24 #include <sys/map.h> 25 #include <sys/buf.h> 26 #include <sys/device.h> 27 #include <sys/reboot.h> 28 #include <sys/systm.h> 29 #include <sys/conf.h> 30 #include <sys/file.h> 31 #include <sys/clist.h> 32 #include <sys/callout.h> 33 #include <sys/malloc.h> 34 #include <sys/mbuf.h> 35 #include <sys/mount.h> 36 #include <sys/msgbuf.h> 37 #ifdef SYSVSHM 38 #include <sys/shm.h> 39 #endif 40 #include <sys/exec.h> 41 #include <sys/sysctl.h> 42 43 #include <machine/autoconf.h> 44 #include <machine/frame.h> 45 #include <machine/cpu.h> 46 47 #include <vm/vm_kern.h> 48 #include <vm/vm_page.h> 49 50 #include <sparc/sparc/asm.h> 51 #include <sparc/sparc/cache.h> 52 #include <sparc/sparc/vaddrs.h> 53 54 vm_map_t buffer_map; 55 extern vm_offset_t avail_end; 56 57 /* 58 * Declare these as initialized data so we can patch them. 59 */ 60 int nswbuf = 0; 61 #ifdef NBUF 62 int nbuf = NBUF; 63 #else 64 int nbuf = 0; 65 #endif 66 #ifdef BUFPAGES 67 int bufpages = BUFPAGES; 68 #else 69 int bufpages = 0; 70 #endif 71 72 int physmem; 73 74 extern struct msgbuf msgbuf; 75 struct msgbuf *msgbufp = &msgbuf; 76 int msgbufmapped = 1; /* message buffer is always mapped */ 77 78 /* 79 * safepri is a safe priority for sleep to set for a spin-wait 80 * during autoconfiguration or after a panic. 81 */ 82 int safepri = 0; 83 84 caddr_t allocsys(); 85 86 /* 87 * Machine-dependent startup code 88 */ 89 cpu_startup() 90 { 91 register unsigned i; 92 register caddr_t v; 93 register int sz; 94 int base, residual; 95 #ifdef DEBUG 96 extern int pmapdebug; 97 int opmapdebug = pmapdebug; 98 #endif 99 vm_offset_t minaddr, maxaddr; 100 vm_size_t size; 101 102 #ifdef DEBUG 103 pmapdebug = 0; 104 #endif 105 106 /* 107 * Good {morning,afternoon,evening,night}. 108 */ 109 printf(version); 110 /*identifycpu();*/ 111 physmem = btoc(avail_end); 112 printf("real mem = %d\n", avail_end); 113 114 /* 115 * Find out how much space we need, allocate it, 116 * and then give everything true virtual addresses. 117 */ 118 sz = (int)allocsys((caddr_t)0); 119 if ((v = (caddr_t)kmem_alloc(kernel_map, round_page(sz))) == 0) 120 panic("startup: no room for tables"); 121 if (allocsys(v) - v != sz) 122 panic("startup: table size inconsistency"); 123 124 /* 125 * Now allocate buffers proper. They are different than the above 126 * in that they usually occupy more virtual memory than physical. 127 */ 128 size = MAXBSIZE * nbuf; 129 buffer_map = kmem_suballoc(kernel_map, (vm_offset_t *)&buffers, 130 &maxaddr, size, FALSE); 131 minaddr = (vm_offset_t)buffers; 132 if (vm_map_find(buffer_map, vm_object_allocate(size), (vm_offset_t)0, 133 &minaddr, size, FALSE) != KERN_SUCCESS) 134 panic("startup: cannot allocate buffers"); 135 base = bufpages / nbuf; 136 residual = bufpages % nbuf; 137 for (i = 0; i < nbuf; i++) { 138 vm_size_t curbufsize; 139 vm_offset_t curbuf; 140 141 /* 142 * First <residual> buffers get (base+1) physical pages 143 * allocated for them. The rest get (base) physical pages. 144 * 145 * The rest of each buffer occupies virtual space, 146 * but has no physical memory allocated for it. 147 */ 148 curbuf = (vm_offset_t)buffers + i * MAXBSIZE; 149 curbufsize = CLBYTES * (i < residual ? base+1 : base); 150 vm_map_pageable(buffer_map, curbuf, curbuf+curbufsize, FALSE); 151 vm_map_simplify(buffer_map, curbuf); 152 } 153 /* 154 * Allocate a submap for exec arguments. This map effectively 155 * limits the number of processes exec'ing at any time. 156 */ 157 exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 158 16*NCARGS, TRUE); 159 /* 160 * Allocate a map for physio. Others use a submap of the kernel 161 * map, but we want one completely separate, even though it uses 162 * the same pmap. 163 */ 164 phys_map = vm_map_create(kernel_pmap, DVMA_BASE, DVMA_END, 1); 165 if (phys_map == NULL) 166 panic("unable to create DVMA map"); 167 168 /* 169 * Finally, allocate mbuf pool. Since mclrefcnt is an off-size 170 * we use the more space efficient malloc in place of kmem_alloc. 171 */ 172 mclrefcnt = (char *)malloc(NMBCLUSTERS+CLBYTES/MCLBYTES, 173 M_MBUF, M_NOWAIT); 174 bzero(mclrefcnt, NMBCLUSTERS+CLBYTES/MCLBYTES); 175 mb_map = kmem_suballoc(kernel_map, (vm_offset_t *)&mbutl, &maxaddr, 176 VM_MBUF_SIZE, FALSE); 177 /* 178 * Initialize callouts 179 */ 180 callfree = callout; 181 for (i = 1; i < ncallout; i++) 182 callout[i-1].c_next = &callout[i]; 183 callout[i-1].c_next = NULL; 184 185 #ifdef DEBUG 186 pmapdebug = opmapdebug; 187 #endif 188 printf("avail mem = %d\n", ptoa(cnt.v_free_count)); 189 printf("using %d buffers containing %d bytes of memory\n", 190 nbuf, bufpages * CLBYTES); 191 192 /* 193 * Set up buffers, so they can be used to read disk labels. 194 */ 195 bufinit(); 196 197 /* 198 * Configure the system. 199 */ 200 configure(); 201 202 /* 203 * Turn on the cache (do after configuration due to a bug in 204 * some versions of the SPARC chips -- this info from Gilmore). 205 */ 206 cache_enable(); 207 } 208 209 /* 210 * Allocate space for system data structures. We are given 211 * a starting virtual address and we return a final virtual 212 * address; along the way we set each data structure pointer. 213 * 214 * You call allocsys() with 0 to find out how much space we want, 215 * allocate that much and fill it with zeroes, and then call 216 * allocsys() again with the correct base virtual address. 217 */ 218 caddr_t 219 allocsys(v) 220 register caddr_t v; 221 { 222 223 #define valloc(name, type, num) \ 224 v = (caddr_t)(((name) = (type *)v) + (num)) 225 valloc(cfree, struct cblock, nclist); 226 valloc(callout, struct callout, ncallout); 227 valloc(swapmap, struct map, nswapmap = maxproc * 2); 228 #ifdef SYSVSHM 229 valloc(shmsegs, struct shmid_ds, shminfo.shmmni); 230 #endif 231 232 /* 233 * Determine how many buffers to allocate (enough to 234 * hold 5% of total physical memory, but at least 16). 235 * Allocate 1/2 as many swap buffer headers as file i/o buffers. 236 */ 237 if (bufpages == 0) 238 bufpages = (physmem / 20) / CLSIZE; 239 if (nbuf == 0) { 240 nbuf = bufpages; 241 if (nbuf < 16) 242 nbuf = 16; 243 } 244 if (nswbuf == 0) { 245 nswbuf = (nbuf / 2) &~ 1; /* force even */ 246 if (nswbuf > 256) 247 nswbuf = 256; /* sanity */ 248 } 249 valloc(swbuf, struct buf, nswbuf); 250 valloc(buf, struct buf, nbuf); 251 return (v); 252 } 253 254 /* 255 * Set up registers on exec. 256 * 257 * XXX this entire mess must be fixed 258 */ 259 /* ARGSUSED */ 260 setregs(p, entry, retval) 261 register struct proc *p; 262 u_long entry; 263 int retval[2]; 264 { 265 register struct trapframe *tf = p->p_md.md_tf; 266 register struct fpstate *fs; 267 register int psr, sp; 268 269 /* 270 * The syscall will ``return'' to npc or %g7 or %g2; set them all. 271 * Set the rest of the registers to 0 except for %o6 (stack pointer, 272 * built in exec()) and psr (retain CWP and PSR_S bits). 273 */ 274 psr = tf->tf_psr & (PSR_S | PSR_CWP); 275 sp = tf->tf_out[6]; 276 if ((fs = p->p_md.md_fpstate) != NULL) { 277 /* 278 * We hold an FPU state. If we own *the* FPU chip state 279 * we must get rid of it, and the only way to do that is 280 * to save it. In any case, get rid of our FPU state. 281 */ 282 if (p == fpproc) { 283 savefpstate(fs); 284 fpproc = NULL; 285 } 286 free((void *)fs, M_SUBPROC); 287 p->p_md.md_fpstate = NULL; 288 } 289 bzero((caddr_t)tf, sizeof *tf); 290 tf->tf_psr = psr; 291 tf->tf_global[2] = tf->tf_global[7] = tf->tf_npc = entry & ~3; 292 tf->tf_out[6] = sp; 293 retval[1] = 0; 294 } 295 296 #ifdef DEBUG 297 int sigdebug = 0; 298 int sigpid = 0; 299 #define SDB_FOLLOW 0x01 300 #define SDB_KSTACK 0x02 301 #define SDB_FPSTATE 0x04 302 #endif 303 304 struct sigframe { 305 int sf_signo; /* signal number */ 306 int sf_code; /* code */ 307 #ifdef COMPAT_SUNOS 308 struct sigcontext *sf_scp; /* points to user addr of sigcontext */ 309 #else 310 int sf_xxx; /* placeholder */ 311 #endif 312 int sf_addr; /* SunOS compat, always 0 for now */ 313 struct sigcontext sf_sc; /* actual sigcontext */ 314 }; 315 316 /* 317 * machine dependent system variables. 318 */ 319 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 320 int *name; 321 u_int namelen; 322 void *oldp; 323 size_t *oldlenp; 324 void *newp; 325 size_t newlen; 326 struct proc *p; 327 { 328 329 /* all sysctl names are this level are terminal */ 330 if (namelen != 1) 331 return (ENOTDIR); /* overloaded */ 332 333 switch (name[0]) { 334 default: 335 return (EOPNOTSUPP); 336 } 337 /* NOTREACHED */ 338 } 339 340 /* 341 * Send an interrupt to process. 342 */ 343 void 344 sendsig(catcher, sig, mask, code) 345 sig_t catcher; 346 int sig, mask; 347 unsigned code; 348 { 349 register struct proc *p = curproc; 350 register struct sigacts *psp = p->p_sigacts; 351 register struct sigframe *fp; 352 register struct trapframe *tf; 353 register int addr, oonstack, oldsp, newsp; 354 struct sigframe sf; 355 extern char sigcode[], esigcode[]; 356 #define szsigcode (esigcode - sigcode) 357 358 tf = p->p_md.md_tf; 359 oldsp = tf->tf_out[6]; 360 oonstack = psp->ps_sigstk.ss_flags & SA_ONSTACK; 361 /* 362 * Compute new user stack addresses, subtract off 363 * one signal frame, and align. 364 */ 365 if ((psp->ps_flags & SAS_ALTSTACK) && !oonstack && 366 (psp->ps_sigonstack & sigmask(sig))) { 367 fp = (struct sigframe *)(psp->ps_sigstk.ss_base + 368 psp->ps_sigstk.ss_size); 369 psp->ps_sigstk.ss_flags |= SA_ONSTACK; 370 } else 371 fp = (struct sigframe *)oldsp; 372 fp = (struct sigframe *)((int)(fp - 1) & ~7); 373 374 #ifdef DEBUG 375 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 376 printf("sendsig: %s[%d] sig %d newusp %x scp %x\n", 377 p->p_comm, p->p_pid, sig, fp, &fp->sf_sc); 378 #endif 379 /* 380 * Now set up the signal frame. We build it in kernel space 381 * and then copy it out. We probably ought to just build it 382 * directly in user space.... 383 */ 384 sf.sf_signo = sig; 385 sf.sf_code = code; 386 #ifdef COMPAT_SUNOS 387 sf.sf_scp = &fp->sf_sc; 388 #endif 389 sf.sf_addr = 0; /* XXX */ 390 391 /* 392 * Build the signal context to be used by sigreturn. 393 */ 394 sf.sf_sc.sc_onstack = oonstack; 395 sf.sf_sc.sc_mask = mask; 396 sf.sf_sc.sc_sp = oldsp; 397 sf.sf_sc.sc_pc = tf->tf_pc; 398 sf.sf_sc.sc_npc = tf->tf_npc; 399 sf.sf_sc.sc_psr = tf->tf_psr; 400 sf.sf_sc.sc_g1 = tf->tf_global[1]; 401 sf.sf_sc.sc_o0 = tf->tf_out[0]; 402 403 /* 404 * Put the stack in a consistent state before we whack away 405 * at it. Note that write_user_windows may just dump the 406 * registers into the pcb; we need them in the process's memory. 407 * We also need to make sure that when we start the signal handler, 408 * its %i6 (%fp), which is loaded from the newly allocated stack area, 409 * joins seamlessly with the frame it was in when the signal occurred, 410 * so that the debugger and _longjmp code can back up through it. 411 */ 412 newsp = (int)fp - sizeof(struct rwindow); 413 write_user_windows(); 414 if (rwindow_save(p) || copyout((caddr_t)&sf, (caddr_t)fp, sizeof sf) || 415 suword(&((struct rwindow *)newsp)->rw_in[6], oldsp)) { 416 /* 417 * Process has trashed its stack; give it an illegal 418 * instruction to halt it in its tracks. 419 */ 420 #ifdef DEBUG 421 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 422 printf("sendsig: window save or copyout error\n"); 423 #endif 424 sigexit(p, SIGILL); 425 /* NOTREACHED */ 426 } 427 #ifdef DEBUG 428 if (sigdebug & SDB_FOLLOW) 429 printf("sendsig: %s[%d] sig %d scp %x\n", 430 p->p_comm, p->p_pid, sig, &fp->sf_sc); 431 #endif 432 /* 433 * Arrange to continue execution at the code copied out in exec(). 434 * It needs the function to call in %g1, and a new stack pointer. 435 */ 436 #ifdef COMPAT_SUNOS 437 if (psp->ps_usertramp & sigmask(sig)) { 438 addr = (int)catcher; /* user does his own trampolining */ 439 } else 440 #endif 441 { 442 addr = USRSTACK - sizeof(struct ps_strings) - szsigcode; 443 tf->tf_global[1] = (int)catcher; 444 } 445 tf->tf_pc = addr; 446 tf->tf_npc = addr + 4; 447 tf->tf_out[6] = newsp; 448 #ifdef DEBUG 449 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 450 printf("sendsig: about to return to catcher\n"); 451 #endif 452 } 453 454 /* 455 * System call to cleanup state after a signal 456 * has been taken. Reset signal mask and 457 * stack state from context left by sendsig (above), 458 * and return to the given trap frame (if there is one). 459 * Check carefully to make sure that the user has not 460 * modified the state to gain improper privileges or to cause 461 * a machine fault. 462 */ 463 /* ARGSUSED */ 464 struct sigreturn_args { 465 struct sigcontext *scp; 466 }; 467 sigreturn(p, uap, retval) 468 register struct proc *p; 469 struct sigreturn_args *uap; 470 int *retval; 471 { 472 register struct sigcontext *scp; 473 register struct trapframe *tf; 474 475 /* First ensure consistent stack state (see sendsig). */ 476 write_user_windows(); 477 if (rwindow_save(p)) 478 sigexit(p, SIGILL); 479 #ifdef DEBUG 480 if (sigdebug & SDB_FOLLOW) 481 printf("sigreturn: %s[%d], scp %x\n", 482 p->p_comm, p->p_pid, uap->scp); 483 #endif 484 scp = uap->scp; 485 if ((int)scp & 3 || useracc((caddr_t)scp, sizeof *scp, B_WRITE) == 0) 486 return (EINVAL); 487 tf = p->p_md.md_tf; 488 /* 489 * Only the icc bits in the psr are used, so it need not be 490 * verified. pc and npc must be multiples of 4. This is all 491 * that is required; if it holds, just do it. 492 */ 493 if (((scp->sc_pc | scp->sc_npc) & 3) != 0) 494 return (EINVAL); 495 /* take only psr ICC field */ 496 tf->tf_psr = (tf->tf_psr & ~PSR_ICC) | (scp->sc_psr & PSR_ICC); 497 tf->tf_pc = scp->sc_pc; 498 tf->tf_npc = scp->sc_npc; 499 tf->tf_global[1] = scp->sc_g1; 500 tf->tf_out[0] = scp->sc_o0; 501 tf->tf_out[6] = scp->sc_sp; 502 if (scp->sc_onstack & 1) 503 p->p_sigacts->ps_sigstk.ss_flags |= SA_ONSTACK; 504 else 505 p->p_sigacts->ps_sigstk.ss_flags &= ~SA_ONSTACK; 506 p->p_sigmask = scp->sc_mask & ~sigcantmask; 507 return (EJUSTRETURN); 508 } 509 510 int waittime = -1; 511 512 boot(howto) 513 register int howto; 514 { 515 int i; 516 static char str[4]; /* room for "-sd\0" */ 517 extern volatile void romhalt(void); 518 extern volatile void romboot(char *); 519 520 fb_unblank(); 521 boothowto = howto; 522 if ((howto & RB_NOSYNC) == 0 && waittime < 0 && rootfs) { 523 register struct buf *bp; 524 int iter, nbusy; 525 #if 1 526 extern struct proc proc0; 527 528 /* protect against curproc->p_stats.foo refs in sync() XXX */ 529 if (curproc == NULL) 530 curproc = &proc0; 531 #endif 532 waittime = 0; 533 (void) spl0(); 534 printf("syncing disks... "); 535 /* 536 * Release vnodes held by texts before sync. 537 */ 538 if (panicstr == 0) 539 vnode_pager_umount((struct mount *)NULL); 540 sync(&proc0, (void *)NULL, (int *)NULL); 541 542 for (iter = 0; iter < 20; iter++) { 543 nbusy = 0; 544 for (bp = &buf[nbuf]; --bp >= buf; ) 545 if ((bp->b_flags & (B_BUSY|B_INVAL)) == B_BUSY) 546 nbusy++; 547 if (nbusy == 0) 548 break; 549 printf("%d ", nbusy); 550 DELAY(40000 * iter); 551 } 552 if (nbusy) 553 printf("giving up\n"); 554 else 555 printf("done\n"); 556 /* 557 * If we've been adjusting the clock, the todr 558 * will be out of synch; adjust it now. 559 */ 560 resettodr(); 561 } 562 (void) splhigh(); /* ??? */ 563 if (howto & RB_HALT) { 564 printf("halted\n\n"); 565 romhalt(); 566 } 567 if (howto & RB_DUMP) 568 dumpsys(); 569 printf("rebooting\n\n"); 570 i = 1; 571 if (howto & RB_SINGLE) 572 str[i++] = 's'; 573 if (howto & RB_KDB) 574 str[i++] = 'd'; 575 if (i > 1) { 576 str[0] = '-'; 577 str[i] = 0; 578 } else 579 str[0] = 0; 580 romboot(str); 581 /*NOTREACHED*/ 582 } 583 584 int dumpmag = 0x8fca0101; /* magic number for savecore */ 585 int dumpsize = 0; /* also for savecore */ 586 long dumplo = 0; 587 588 dumpconf() 589 { 590 int nblks; 591 592 dumpsize = physmem; 593 #define DUMPMMU 594 #ifdef DUMPMMU 595 #define NPMEG 128 596 /* 597 * savecore views the image in units of pages (i.e., dumpsize is in 598 * pages) so we round the two mmu entities into page-sized chunks. 599 * The PMEGs (32kB) and the segment table (512 bytes plus padding) 600 * are appending to the end of the crash dump. 601 */ 602 dumpsize += btoc(sizeof(((struct kpmap *)0)->pm_rsegmap)) + 603 btoc(NPMEG * NPTESG * sizeof(int)); 604 #endif 605 if (dumpdev != NODEV && bdevsw[major(dumpdev)].d_psize) { 606 nblks = (*bdevsw[major(dumpdev)].d_psize)(dumpdev); 607 /* 608 * Don't dump on the first CLBYTES (why CLBYTES?) 609 * in case the dump device includes a disk label. 610 */ 611 if (dumplo < btodb(CLBYTES)) 612 dumplo = btodb(CLBYTES); 613 614 /* 615 * If dumpsize is too big for the partition, truncate it. 616 * Otherwise, put the dump at the end of the partition 617 * by making dumplo as large as possible. 618 */ 619 if (dumpsize > btoc(dbtob(nblks - dumplo))) 620 dumpsize = btoc(dbtob(nblks - dumplo)); 621 else if (dumplo + ctod(dumpsize) > nblks) 622 dumplo = nblks - ctod(dumpsize); 623 } 624 } 625 626 #ifdef DUMPMMU 627 /* XXX */ 628 #include <machine/ctlreg.h> 629 #define getpte(va) lda(va, ASI_PTE) 630 #define setsegmap(va, pmeg) stba(va, ASI_SEGMAP, pmeg) 631 632 /* 633 * Write the mmu contents to the dump device. 634 * This gets appended to the end of a crash dump since 635 * there is no in-core copy of kernel memory mappings. 636 */ 637 int 638 dumpmmu(blkno) 639 register daddr_t blkno; 640 { 641 register int (*dump)(/*dev_t, daddr_t, caddr_t, int*/); 642 register int pmeg; 643 register int addr; /* unused kernel virtual address */ 644 register int i; 645 register int *pte, *ptend; 646 register int error; 647 register struct kpmap *kpmap = &kernel_pmap_store; 648 int buffer[dbtob(1) / sizeof(int)]; 649 extern int seginval; /* from pmap.c */ 650 651 652 dump = bdevsw[major(dumpdev)].d_dump; 653 654 /* 655 * dump page table entries 656 * 657 * We dump each pmeg in order (by segment number). Since the MMU 658 * automatically maps the given virtual segment to a pmeg we must 659 * iterate over the segments by incrementing an unused segment slot 660 * in the MMU. This fixed segment number is used in the virtual 661 * address argument to getpte(). 662 */ 663 664 /* First find an unused virtual segment. */ 665 i = NKSEG; 666 while (kpmap->pm_rsegmap[--i] != seginval) 667 if (i <= 0) 668 return (-1); 669 /* 670 * Compute the base address corresponding to the unused segment. 671 * Note that the kernel segments start after all the user segments 672 * so we must account for this offset. 673 */ 674 addr = VSTOVA(i + NUSEG); 675 /* 676 * Go through the pmegs and dump each one. 677 */ 678 pte = buffer; 679 ptend = &buffer[sizeof(buffer) / sizeof(buffer[0])]; 680 for (pmeg = 0; pmeg < NPMEG; ++pmeg) { 681 register int va = addr; 682 683 setsegmap(addr, pmeg); 684 i = NPTESG; 685 do { 686 *pte++ = getpte(va); 687 if (pte >= ptend) { 688 /* 689 * Note that we'll dump the last block 690 * the last time through the loops because 691 * all the PMEGs occupy 32KB which is 692 * a multiple of the block size. 693 */ 694 error = (*dump)(dumpdev, blkno, 695 (caddr_t)buffer, 696 dbtob(1)); 697 if (error != 0) 698 return (error); 699 ++blkno; 700 pte = buffer; 701 } 702 va += NBPG; 703 } while (--i > 0); 704 } 705 setsegmap(addr, seginval); 706 707 /* 708 * dump (512 byte) segment map 709 * XXX assume it's a multiple of the block size 710 */ 711 error = (*dump)(dumpdev, blkno, (caddr_t)kpmap->pm_rsegmap, 712 sizeof(kpmap->pm_rsegmap)); 713 return (error); 714 } 715 #endif 716 717 #define BYTES_PER_DUMP (32 * 1024) /* must be a multiple of pagesize */ 718 static vm_offset_t dumpspace; 719 720 caddr_t 721 reserve_dumppages(p) 722 caddr_t p; 723 { 724 725 dumpspace = (vm_offset_t)p; 726 return (p + BYTES_PER_DUMP); 727 } 728 729 /* 730 * Write a crash dump. 731 */ 732 dumpsys() 733 { 734 register unsigned bytes, i, n; 735 register int maddr, psize; 736 register daddr_t blkno; 737 register int (*dump)(/*dev_t, daddr_t, caddr_t, int, int*/); 738 int error = 0; 739 740 if (dumpdev == NODEV) 741 return; 742 /* copy registers to memory */ 743 snapshot(cpcb); 744 /* 745 * For dumps during autoconfiguration, 746 * if dump device has already configured... 747 */ 748 if (dumpsize == 0) 749 dumpconf(); 750 if (dumplo < 0) 751 return; 752 printf("\ndumping to dev %x, offset %d\n", dumpdev, dumplo); 753 754 psize = (*bdevsw[major(dumpdev)].d_psize)(dumpdev); 755 printf("dump "); 756 if (psize == -1) { 757 printf("area unavailable\n"); 758 return; 759 } 760 bytes = physmem << PGSHIFT; 761 maddr = 0; 762 blkno = dumplo; 763 dump = bdevsw[major(dumpdev)].d_dump; 764 for (i = 0; i < bytes; i += n) { 765 n = bytes - i; 766 if (n > BYTES_PER_DUMP) 767 n = BYTES_PER_DUMP; 768 #ifdef DEBUG 769 /* print out how many MBs we have dumped */ 770 if (i && (i % (1024*1024)) == 0) 771 printf("%d ", i / (1024*1024)); 772 #endif 773 (void) pmap_map(dumpspace, maddr, maddr + n, VM_PROT_READ); 774 error = (*dump)(dumpdev, blkno, (caddr_t)dumpspace, (int)n); 775 if (error) 776 break; 777 maddr += n; 778 blkno += btodb(n); 779 } 780 #ifdef DUMPMMU 781 if (!error) 782 error = dumpmmu(blkno); 783 #endif 784 switch (error) { 785 786 case ENXIO: 787 printf("device bad\n"); 788 break; 789 790 case EFAULT: 791 printf("device not ready\n"); 792 break; 793 794 case EINVAL: 795 printf("area improper\n"); 796 break; 797 798 case EIO: 799 printf("i/o error\n"); 800 break; 801 802 case 0: 803 printf("succeeded\n"); 804 break; 805 806 default: 807 printf("error %d\n", error); 808 break; 809 } 810 } 811 812 /* 813 * Map an I/O device given physical address and size in bytes, e.g., 814 * 815 * mydev = (struct mydev *)mapdev(myioaddr, 0, sizeof(struct mydev)); 816 * 817 * See also machine/autoconf.h. 818 */ 819 void * 820 mapdev(phys, virt, size) 821 register void *phys; 822 register int virt, size; 823 { 824 register vm_offset_t v; 825 register void *ret; 826 static vm_offset_t iobase = IODEV_BASE; 827 828 size = round_page(size); 829 if (virt) 830 v = trunc_page(virt); 831 else { 832 v = iobase; 833 iobase += size; 834 if (iobase > IODEV_END) /* unlikely */ 835 panic("mapiodev"); 836 } 837 ret = (void *)v; 838 phys = (void *)trunc_page(phys); 839 do { 840 pmap_enter(kernel_pmap, v, 841 (vm_offset_t)phys | PMAP_OBIO | PMAP_NC, 842 VM_PROT_READ | VM_PROT_WRITE, 1); 843 v += PAGE_SIZE; 844 phys += PAGE_SIZE; 845 } while ((size -= PAGE_SIZE) > 0); 846 return (ret); 847 } 848