machdep.c revision 1.12
1 /* $NetBSD: machdep.c,v 1.12 2000/09/24 12:32:35 jdolecek Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tohru Nishimura. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 40 41 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.12 2000/09/24 12:32:35 jdolecek Exp $"); 42 43 #include "opt_ddb.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/map.h> 49 #include <sys/proc.h> 50 #include <sys/buf.h> 51 #include <sys/reboot.h> 52 #include <sys/conf.h> 53 #include <sys/file.h> 54 #include <sys/clist.h> 55 #include <sys/device.h> 56 #include <sys/malloc.h> 57 #include <sys/mbuf.h> 58 #include <sys/msgbuf.h> 59 #include <sys/ioctl.h> 60 #include <sys/tty.h> 61 #include <sys/mount.h> 62 #include <sys/user.h> 63 #include <sys/exec.h> 64 #include <sys/core.h> 65 #include <sys/kcore.h> 66 #include <sys/vnode.h> 67 #include <sys/syscallargs.h> 68 #ifdef KGDB 69 #include <sys/kgdb.h> 70 #endif 71 #include <sys/boot_flag.h> 72 73 #include <uvm/uvm_extern.h> 74 75 #include <sys/sysctl.h> 76 77 #include <machine/cpu.h> 78 #include <machine/reg.h> 79 #include <machine/psl.h> 80 #include <machine/pte.h> 81 #include <machine/kcore.h> /* XXX should be pulled in by sys/kcore.h */ 82 83 #include <dev/cons.h> 84 85 #if defined(DDB) 86 #include <machine/db_machdep.h> 87 #include <ddb/db_sym.h> 88 #include <ddb/db_extern.h> 89 #endif 90 91 /* 92 * Info for CTL_HW 93 */ 94 char machine[] = MACHINE; 95 char cpu_model[60]; 96 97 /* Our exported CPU info; we can have only one. */ 98 struct cpu_info cpu_info_store; 99 100 extern char kernel_text[]; 101 extern char etext[]; 102 103 vm_map_t exec_map = NULL; 104 vm_map_t mb_map = NULL; 105 vm_map_t phys_map = NULL; 106 107 caddr_t msgbufaddr; 108 int maxmem; /* max memory per process */ 109 int physmem; /* set by locore */ 110 /* 111 * safepri is a safe priority for sleep to set for a spin-wait 112 * during autoconfiguration or after a panic. 113 */ 114 int safepri = PSL_LOWIPL; 115 116 void luna68k_init __P((void)); 117 void identifycpu __P((void)); 118 void dumpsys __P((void)); 119 120 void straytrap __P((int, u_short)); 121 void nmihand __P((struct frame)); 122 123 int cpu_dumpsize __P((void)); 124 int cpu_dump __P((int (*)(dev_t, daddr_t, caddr_t, size_t), daddr_t *)); 125 void cpu_init_kcore_hdr __P((void)); 126 127 /* 128 * Machine-independent crash dump header info. 129 */ 130 cpu_kcore_hdr_t cpu_kcore_hdr; 131 132 int machtype; /* model: 1 for LUNA-1, 2 for LUNA-2 */ 133 int sysconsole; /* console: 0 for ttya, 1 for video */ 134 135 extern struct consdev syscons; 136 extern void omfb_cnattach __P((void)); 137 extern void ws_cnattach __P((void)); 138 extern void syscnattach __P((int)); 139 140 /* 141 * On the 68020/68030, the value of delay_divisor is roughly 142 * 2048 / cpuspeed (where cpuspeed is in MHz). 143 * 144 * On the 68040/68060(?), the value of delay_divisor is roughly 145 * 759 / cpuspeed (where cpuspeed is in MHz). 146 * XXX -- is the above formula correct? 147 */ 148 int cpuspeed = 25; /* only used for printing later */ 149 int delay_divisor = 300; /* for delay() loop count */ 150 151 /* 152 * Early initialization, before main() is called. 153 */ 154 void 155 luna68k_init() 156 { 157 int i; 158 159 extern paddr_t avail_start, avail_end; 160 161 /* 162 * Tell the VM system about available physical memory. The 163 * luna68k only has one segment. 164 */ 165 uvm_page_physload(atop(avail_start), atop(avail_end), 166 atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT); 167 168 /* 169 * Initialize error message buffer (at end of core). 170 * avail_end was pre-decremented in pmap_bootstrap to compensate. 171 */ 172 for (i = 0; i < btoc(MSGBUFSIZE); i++) 173 pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * NBPG, 174 avail_end + i * NBPG, VM_PROT_READ|VM_PROT_WRITE, 175 VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED); 176 initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE)); 177 } 178 179 /* 180 * Console initialization: called early on from main, 181 */ 182 void 183 consinit() 184 { 185 volatile unsigned char *pio0 = (void *)0x49000000; 186 int sw1, i; 187 char *cp; 188 extern char bootarg[64]; 189 190 pio0[3] = 0xb6; 191 pio0[2] = 1 << 6; /* enable parity check */ 192 193 pio0[3] = 0xb6; 194 sw1 = pio0[0]; /* dipssw1 value */ 195 sw1 ^= 0xff; 196 sysconsole = !(sw1 & 0x2); /* console selection */ 197 198 boothowto = 0; 199 i = 0; 200 /* 201 * 'bootarg' has; 202 * "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>" 203 * where <addr> is MAC address of which network loader used (not 204 * necessarily same as one at 0x4101.FFE0), <host> and <name> 205 * are the values of HOST and SERVER environment variables, 206 * 207 * NetBSD/luna68k cares only the first argment; any of "sda". 208 */ 209 for (cp = bootarg; *cp != ' '; cp++) { 210 BOOT_FLAG(*cp, boothowto); 211 if (i++ >= sizeof(bootarg)) 212 break; 213 } 214 #if 0 /* overload 1:sw1, which now means 'go ROM monitor' after poweron */ 215 if (boothowto == 0) 216 boothowto = (sw1 & 0x1) ? RB_SINGLE : 0; 217 #endif 218 219 if (sysconsole == 0) 220 syscnattach(0); 221 else { 222 omfb_cnattach(); 223 ws_cnattach(); 224 } 225 226 #ifdef DDB 227 { 228 extern int end; 229 extern int *esym; 230 231 ddb_init(*(int *)&end, ((int *)&end) + 1, esym); 232 } 233 if (boothowto & RB_KDB) 234 cpu_Debugger(); 235 #endif 236 } 237 238 /* 239 * cpu_startup: allocate memory for variable-sized tables. 240 */ 241 void 242 cpu_startup() 243 { 244 int i; 245 caddr_t v; 246 int base, residual; 247 vaddr_t minaddr, maxaddr; 248 vsize_t size; 249 char pbuf[9]; 250 extern void greeting __P((void)); 251 252 /* 253 * Initialize the kernel crash dump header. 254 */ 255 cpu_init_kcore_hdr(); 256 257 /* 258 * Good {morning,afternoon,evening,night}. 259 */ 260 printf(version); 261 identifycpu(); 262 263 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 264 printf("total memory = %s\n", pbuf); 265 266 /* 267 * Find out how much space we need, allocate it, 268 * and then give everything true virtual addresses. 269 */ 270 size = (int)allocsys(NULL, NULL); 271 if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(size))) == 0) 272 panic("startup: no room for tables"); 273 if (allocsys(v, NULL) - v != size) 274 panic("startup: table size inconsistency"); 275 276 /* 277 * Now allocate buffers proper. They are different than the above 278 * in that they usually occupy more virtual memory than physical. 279 */ 280 size = MAXBSIZE * nbuf; 281 if (uvm_map(kernel_map, (vaddr_t *) &buffers, round_page(size), 282 NULL, UVM_UNKNOWN_OFFSET, 0, 283 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 284 UVM_ADV_NORMAL, 0)) != KERN_SUCCESS) 285 panic("startup: cannot allocate VM for buffers"); 286 minaddr = (vaddr_t)buffers; 287 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 288 /* don't want to alloc more physical mem than needed */ 289 bufpages = btoc(MAXBSIZE) * nbuf; 290 } 291 base = bufpages / nbuf; 292 residual = bufpages % nbuf; 293 for (i = 0; i < nbuf; i++) { 294 vsize_t curbufsize; 295 vaddr_t curbuf; 296 struct vm_page *pg; 297 298 /* 299 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 300 * that MAXBSIZE space, we allocate and map (base+1) pages 301 * for the first "residual" buffers, and then we allocate 302 * "base" pages for the rest. 303 */ 304 curbuf = (vsize_t) buffers + (i * MAXBSIZE); 305 curbufsize = NBPG * ((i < residual) ? (base+1) : base); 306 307 while (curbufsize) { 308 pg = uvm_pagealloc(NULL, 0, NULL, 0); 309 if (pg == NULL) 310 panic("cpu_startup: not enough memory for " 311 "buffer cache"); 312 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 313 VM_PROT_READ|VM_PROT_WRITE); 314 curbuf += PAGE_SIZE; 315 curbufsize -= PAGE_SIZE; 316 } 317 } 318 319 /* 320 * Allocate a submap for exec arguments. This map effectively 321 * limits the number of processes exec'ing at any time. 322 */ 323 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 324 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 325 326 /* 327 * Allocate a submap for physio 328 */ 329 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 330 VM_PHYS_SIZE, 0, FALSE, NULL); 331 332 /* 333 * Finally, allocate mbuf cluster submap. 334 */ 335 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 336 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 337 FALSE, NULL); 338 339 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 340 printf("avail memory = %s\n", pbuf); 341 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 342 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 343 344 /* 345 * Tell the VM system that the area before the text segment 346 * is invalid. 347 * 348 * XXX Should just change KERNBASE and VM_MIN_KERNEL_ADDRESS, 349 * XXX but not right now. 350 */ 351 if (uvm_map_protect(kernel_map, 0, round_page((vaddr_t)&kernel_text), 352 UVM_PROT_NONE, TRUE) != KERN_SUCCESS) 353 panic("can't mark pre-text pages off-limits"); 354 355 /* 356 * Tell the VM system that writing to kernel text isn't allowed. 357 * If we don't, we might end up COW'ing the text segment! 358 */ 359 if (uvm_map_protect(kernel_map, trunc_page((vaddr_t)&kernel_text), 360 trunc_page((vaddr_t)&etext), UVM_PROT_READ|UVM_PROT_EXEC, TRUE) 361 != KERN_SUCCESS) 362 panic("can't protect kernel text"); 363 364 /* 365 * Set up buffers, so they can be used to read disk labels. 366 */ 367 bufinit(); 368 369 /* 370 * Say "Hi" to the world 371 */ 372 greeting(); 373 } 374 375 /* 376 * Set registers on exec. 377 */ 378 void 379 setregs(p, pack, stack) 380 register struct proc *p; 381 struct exec_package *pack; 382 u_long stack; 383 { 384 struct frame *frame = (struct frame *)p->p_md.md_regs; 385 extern int fputype; 386 387 frame->f_sr = PSL_USERSET; 388 frame->f_pc = pack->ep_entry & ~1; 389 frame->f_regs[D0] = 0; 390 frame->f_regs[D1] = 0; 391 frame->f_regs[D2] = 0; 392 frame->f_regs[D3] = 0; 393 frame->f_regs[D4] = 0; 394 frame->f_regs[D5] = 0; 395 frame->f_regs[D6] = 0; 396 frame->f_regs[D7] = 0; 397 frame->f_regs[A0] = 0; 398 frame->f_regs[A1] = 0; 399 frame->f_regs[A2] = (int)PS_STRINGS; 400 frame->f_regs[A3] = 0; 401 frame->f_regs[A4] = 0; 402 frame->f_regs[A5] = 0; 403 frame->f_regs[A6] = 0; 404 frame->f_regs[SP] = stack; 405 406 /* restore a null state frame */ 407 p->p_addr->u_pcb.pcb_fpregs.fpf_null = 0; 408 if (fputype) 409 m68881_restore(&p->p_addr->u_pcb.pcb_fpregs); 410 } 411 412 void 413 identifycpu() 414 { 415 extern int cputype; 416 char *cpu; 417 418 bzero(cpu_model, sizeof(cpu_model)); 419 switch (cputype) { 420 case CPU_68030: 421 cpu = "MC68030 CPU+MMU, MC68882 FPU"; 422 machtype = LUNA_I; 423 cpuspeed = 20; delay_divisor = 102; /* 20MHz 68030 */ 424 hz = 60; 425 break; 426 #ifdef M68040 427 case CPU_68040: 428 cpu = "MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches"; 429 machtype = LUNA_II; 430 cpuspeed = 25; delay_divisor = 300; /* 25MHz 68040 */ 431 break; 432 #endif 433 default: 434 panic("unknown CPU type"); 435 } 436 strcpy(cpu_model, cpu); 437 printf("%s\n", cpu_model); 438 } 439 440 /* 441 * machine dependent system variables. 442 */ 443 int 444 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 445 int *name; 446 u_int namelen; 447 void *oldp; 448 size_t *oldlenp; 449 void *newp; 450 size_t newlen; 451 struct proc *p; 452 { 453 dev_t consdev; 454 455 /* all sysctl names at this level are terminal */ 456 if (namelen != 1) 457 return (ENOTDIR); /* overloaded */ 458 459 switch (name[0]) { 460 case CPU_CONSDEV: 461 if (cn_tab != NULL) 462 consdev = cn_tab->cn_dev; 463 else 464 consdev = NODEV; 465 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 466 sizeof consdev)); 467 default: 468 return (EOPNOTSUPP); 469 } 470 /* NOTREACHED */ 471 } 472 473 int waittime = -1; 474 475 void 476 cpu_reboot(howto, bootstr) 477 volatile int howto; /* XXX to shutup GCC XXX */ 478 char *bootstr; 479 { 480 extern void doboot __P((void)); 481 482 /* take a snap shot before clobbering any registers */ 483 if (curproc && curproc->p_addr) 484 savectx(&curproc->p_addr->u_pcb); 485 486 /* If system is hold, just halt. */ 487 if (cold) { 488 howto |= RB_HALT; 489 goto haltsys; 490 } 491 492 boothowto = howto; 493 if ((howto & RB_NOSYNC) == 0 && waittime < 0) { 494 waittime = 0; 495 vfs_shutdown(); 496 /* 497 * If we've been adjusting the clock, the todr 498 * will be out of synch; adjust it now. 499 */ 500 resettodr(); 501 } 502 503 /* Disable interrupts. */ 504 splhigh(); 505 506 /* If rebooting and a dump is requested, do it. */ 507 if (howto & RB_DUMP) 508 dumpsys(); 509 510 haltsys: 511 /* Run any shutdown hooks. */ 512 doshutdownhooks(); 513 514 /* Finally, halt/reboot the system. */ 515 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 516 u_int8_t *pio = (void *)0x4d000000; 517 518 printf("power is going down.\n"); 519 DELAY(100000); 520 pio[3] = 0x94; 521 pio[2] = 0 << 4; 522 for (;;) /* NOP */; 523 } 524 if (howto & RB_HALT) { 525 printf("System halted. Hit any key to reboot.\n\n"); 526 (void)cngetc(); 527 } 528 529 printf("rebooting...\n"); 530 DELAY(100000); 531 doboot(); 532 /*NOTREACHED*/ 533 while (1) ; 534 } 535 536 /* 537 * Initialize the kernel crash dump header. 538 */ 539 void 540 cpu_init_kcore_hdr() 541 { 542 cpu_kcore_hdr_t *h = &cpu_kcore_hdr; 543 struct m68k_kcore_hdr *m = &h->un._m68k; 544 extern char end[]; 545 546 bzero(&cpu_kcore_hdr, sizeof(cpu_kcore_hdr)); 547 548 /* 549 * Initialize the `dispatcher' portion of the header. 550 */ 551 strcpy(h->name, machine); 552 h->page_size = NBPG; 553 h->kernbase = KERNBASE; 554 555 /* 556 * Fill in information about our MMU configuration. 557 */ 558 m->mmutype = mmutype; 559 m->sg_v = SG_V; 560 m->sg_frame = SG_FRAME; 561 m->sg_ishift = SG_ISHIFT; 562 m->sg_pmask = SG_PMASK; 563 m->sg40_shift1 = SG4_SHIFT1; 564 m->sg40_mask2 = SG4_MASK2; 565 m->sg40_shift2 = SG4_SHIFT2; 566 m->sg40_mask3 = SG4_MASK3; 567 m->sg40_shift3 = SG4_SHIFT3; 568 m->sg40_addr1 = SG4_ADDR1; 569 m->sg40_addr2 = SG4_ADDR2; 570 m->pg_v = PG_V; 571 m->pg_frame = PG_FRAME; 572 573 /* 574 * Initialize pointer to kernel segment table. 575 */ 576 m->sysseg_pa = (u_int32_t)(pmap_kernel()->pm_stpa); 577 578 /* 579 * Initialize relocation value such that: 580 * 581 * pa = (va - KERNBASE) + reloc 582 * 583 * Since we're linked and loaded at the same place, 584 * and the kernel is mapped va == pa, this is 0. 585 */ 586 m->reloc = 0; 587 588 /* 589 * Define the end of the relocatable range. 590 */ 591 m->relocend = (u_int32_t)end; 592 593 /* 594 * The luna68k has one contiguous memory segment. 595 */ 596 m->ram_segs[0].start = 0 /* lowram */; 597 m->ram_segs[0].size = ctob(physmem); 598 } 599 600 /* 601 * Compute the size of the machine-dependent crash dump header. 602 * Returns size in disk blocks. 603 */ 604 int 605 cpu_dumpsize() 606 { 607 int size; 608 609 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)); 610 return (btodb(roundup(size, dbtob(1)))); 611 } 612 613 /* 614 * Called by dumpsys() to dump the machine-dependent header. 615 */ 616 int 617 cpu_dump(dump, blknop) 618 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 619 daddr_t *blknop; 620 { 621 int buf[dbtob(1) / sizeof(int)]; 622 cpu_kcore_hdr_t *chdr; 623 kcore_seg_t *kseg; 624 int error; 625 626 kseg = (kcore_seg_t *)buf; 627 chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) / 628 sizeof(int)]; 629 630 /* Create the segment header. */ 631 CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 632 kseg->c_size = dbtob(1) - ALIGN(sizeof(kcore_seg_t)); 633 634 bcopy(&cpu_kcore_hdr, chdr, sizeof(cpu_kcore_hdr_t)); 635 error = (*dump)(dumpdev, *blknop, (caddr_t)buf, sizeof(buf)); 636 *blknop += btodb(sizeof(buf)); 637 return (error); 638 } 639 640 /* 641 * These variables are needed by /sbin/savecore 642 */ 643 u_long dumpmag = 0x8fca0101; /* magic number */ 644 int dumpsize = 0; /* pages */ 645 long dumplo = 0; /* blocks */ 646 647 /* 648 * This is called by main to set dumplo and dumpsize. 649 * Dumps always skip the first NBPG of disk space 650 * in case there might be a disk label stored there. 651 * If there is extra space, put dump at the end to 652 * reduce the chance that swapping trashes it. 653 */ 654 void 655 cpu_dumpconf() 656 { 657 int chdrsize; /* size of dump header */ 658 int nblks; /* size of dump area */ 659 int maj; 660 661 if (dumpdev == NODEV) 662 return; 663 maj = major(dumpdev); 664 if (maj < 0 || maj >= nblkdev) 665 panic("dumpconf: bad dumpdev=0x%x", dumpdev); 666 if (bdevsw[maj].d_psize == NULL) 667 return; 668 nblks = (*bdevsw[maj].d_psize)(dumpdev); 669 chdrsize = cpu_dumpsize(); 670 671 dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size); 672 673 /* 674 * Check do see if we will fit. Note we always skip the 675 * first NBPG in case there is a disk label there. 676 */ 677 if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) { 678 dumpsize = 0; 679 dumplo = -1; 680 return; 681 } 682 683 /* 684 * Put dump at the end of the partition. 685 */ 686 dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize; 687 } 688 689 /* 690 * Dump physical memory onto the dump device. Called by cpu_reboot(). 691 */ 692 void 693 dumpsys() 694 { 695 daddr_t blkno; /* current block to write */ 696 /* dump routine */ 697 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 698 int pg; /* page being dumped */ 699 paddr_t maddr; /* PA being dumped */ 700 int error; /* error code from (*dump)() */ 701 702 /* XXX initialized here because of gcc lossage */ 703 maddr = 0 /* lowram */; 704 pg = 0; 705 706 /* Make sure dump device is valid. */ 707 if (dumpdev == NODEV) 708 return; 709 if (dumpsize == 0) { 710 cpu_dumpconf(); 711 if (dumpsize == 0) 712 return; 713 } 714 if (dumplo <= 0) { 715 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 716 minor(dumpdev)); 717 return; 718 } 719 dump = bdevsw[major(dumpdev)].d_dump; 720 blkno = dumplo; 721 722 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 723 minor(dumpdev), dumplo); 724 725 printf("dump "); 726 727 /* Write the dump header. */ 728 error = cpu_dump(dump, &blkno); 729 if (error) 730 goto bad; 731 732 for (pg = 0; pg < dumpsize; pg++) { 733 #define NPGMB (1024*1024/NBPG) 734 /* print out how many MBs we have dumped */ 735 if (pg && (pg % NPGMB) == 0) 736 printf("%d ", pg / NPGMB); 737 #undef NPGMB 738 pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr, 739 VM_PROT_READ, VM_PROT_READ|PMAP_WIRED); 740 741 error = (*dump)(dumpdev, blkno, vmmap, NBPG); 742 bad: 743 switch (error) { 744 case 0: 745 maddr += NBPG; 746 blkno += btodb(NBPG); 747 break; 748 749 case ENXIO: 750 printf("device bad\n"); 751 return; 752 753 case EFAULT: 754 printf("device not ready\n"); 755 return; 756 757 case EINVAL: 758 printf("area improper\n"); 759 return; 760 761 case EIO: 762 printf("i/o error\n"); 763 return; 764 765 case EINTR: 766 printf("aborted from console\n"); 767 return; 768 769 default: 770 printf("error %d\n", error); 771 return; 772 } 773 } 774 printf("succeeded\n"); 775 } 776 777 void 778 straytrap(pc, evec) 779 int pc; 780 u_short evec; 781 { 782 printf("unexpected trap (vector offset %x) from %x\n", 783 evec & 0xFFF, pc); 784 } 785 786 int *nofault; 787 788 int 789 badaddr(addr, nbytes) 790 register caddr_t addr; 791 int nbytes; 792 { 793 register int i; 794 label_t faultbuf; 795 796 #ifdef lint 797 i = *addr; if (i) return (0); 798 #endif 799 800 nofault = (int *) &faultbuf; 801 if (setjmp((label_t *)nofault)) { 802 nofault = (int *) 0; 803 return(1); 804 } 805 806 switch (nbytes) { 807 case 1: 808 i = *(volatile char *)addr; 809 break; 810 811 case 2: 812 i = *(volatile short *)addr; 813 break; 814 815 case 4: 816 i = *(volatile int *)addr; 817 break; 818 819 default: 820 panic("badaddr: bad request"); 821 } 822 nofault = (int *) 0; 823 return (0); 824 } 825 826 void luna68k_abort __P((char *)); 827 828 static int innmihand; /* simple mutex */ 829 830 /* 831 * Level 7 interrupts are caused by e.g. the ABORT switch. 832 * 833 * If we have DDB, then break into DDB on ABORT. In a production 834 * environment, bumping the ABORT switch would be bad, so we enable 835 * panic'ing on ABORT with the kernel option "PANICBUTTON". 836 */ 837 void 838 nmihand(frame) 839 struct frame frame; 840 { 841 /* Prevent unwanted recursion */ 842 if (innmihand) 843 return; 844 innmihand = 1; 845 846 luna68k_abort("ABORT SWITCH"); 847 } 848 849 /* 850 * Common code for handling ABORT signals from buttons, switches, 851 * serial lines, etc. 852 */ 853 void 854 luna68k_abort(cp) 855 char *cp; 856 { 857 #ifdef DDB 858 printf("%s\n", cp); 859 cpu_Debugger(); 860 #else 861 #ifdef PANICBUTTON 862 panic(cp); 863 #else 864 printf("%s ignored\n", cp); 865 #endif /* PANICBUTTON */ 866 #endif /* DDB */ 867 } 868 869 /* 870 * cpu_exec_aout_makecmds(): 871 * cpu-dependent a.out format hook for execve(). 872 * 873 * Determine of the given exec package refers to something which we 874 * understand and, if so, set up the vmcmds for it. 875 */ 876 int 877 cpu_exec_aout_makecmds(p, epp) 878 struct proc *p; 879 struct exec_package *epp; 880 { 881 int error = ENOEXEC; 882 #ifdef COMPAT_SUNOS 883 extern sunos_exec_aout_makecmds 884 __P((struct proc *, struct exec_package *)); 885 if ((error = sunos_exec_aout_makecmds(p, epp)) == 0) 886 return 0; 887 #endif 888 return error; 889 } 890 891 /* 892 * Return the best possible estimate of the time in the timeval 893 * to which tvp points. Unfortunately, we can't read the hardware registers. 894 * We guarantee that the time will be greater than the value obtained by a 895 * previous call. 896 */ 897 void 898 microtime(tvp) 899 register struct timeval *tvp; 900 { 901 int s = splclock(); 902 static struct timeval lasttime; 903 904 *tvp = time; 905 #ifdef notdef 906 tvp->tv_usec += clkread(); 907 while (tvp->tv_usec >= 1000000) { 908 tvp->tv_sec++; 909 tvp->tv_usec -= 1000000; 910 } 911 #endif 912 if (tvp->tv_sec == lasttime.tv_sec && 913 tvp->tv_usec <= lasttime.tv_usec && 914 (tvp->tv_usec = lasttime.tv_usec + 1) >= 1000000) { 915 tvp->tv_sec++; 916 tvp->tv_usec -= 1000000; 917 } 918 lasttime = *tvp; 919 splx(s); 920 } 921 922 #if 1 923 924 struct consdev *cn_tab = &syscons; 925 926 #else 927 928 /* 929 * romcons is useful until m68k TC register is initialized. 930 */ 931 int romcngetc __P((dev_t)); 932 void romcnputc __P((dev_t, int)); 933 934 struct consdev romcons = { 935 NULL, 936 NULL, 937 romcngetc, 938 romcnputc, 939 nullcnpollc, 940 makedev(7, 0), /* XXX */ 941 CN_DEAD, 942 }; 943 struct consdev *cn_tab = &romcons; 944 945 #define __ ((int **)0x41000000) 946 #define GETC() (*(int (*)())__[6])() 947 #define PUTC(x) (*(void (*)())__[7])(x) 948 949 #define ROMPUTC(x) \ 950 ({ \ 951 register _r; \ 952 asm volatile (" \ 953 movc vbr,%0 ; \ 954 movel %0,sp@- ; \ 955 clrl %0 ; \ 956 movc %0,vbr" \ 957 : "=r" (_r)); \ 958 PUTC(x); \ 959 asm volatile (" \ 960 movel sp@+,%0 ; \ 961 movc %0,vbr" \ 962 : "=r" (_r)); \ 963 }) 964 965 #define ROMGETC() \ 966 ({ \ 967 register _r, _c; \ 968 asm volatile (" \ 969 movc vbr,%0 ; \ 970 movel %0,sp@- ; \ 971 clrl %0 ; \ 972 movc %0,vbr" \ 973 : "=r" (_r)); \ 974 _c = GETC(); \ 975 asm volatile (" \ 976 movel sp@+,%0 ; \ 977 movc %0,vbr" \ 978 : "=r" (_r)); \ 979 _c; \ 980 }) 981 982 void 983 romcnputc(dev, c) 984 dev_t dev; 985 int c; 986 { 987 int s; 988 989 s = splhigh(); 990 ROMPUTC(c); 991 splx(s); 992 } 993 994 int 995 romcngetc(dev) 996 dev_t dev; 997 { 998 int s, c; 999 1000 do { 1001 s = splhigh(); 1002 c = ROMGETC(); 1003 splx(s); 1004 } while (c == -1); 1005 return c; 1006 } 1007 #endif 1008
Indexes created Thu Oct 02 01:09:59 GMT 2025