machdep.c revision 1.37
1 /* $NetBSD: machdep.c,v 1.37 2004/02/13 11:36:14 wiz 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 1.37 2004/02/13 11:36:14 wiz Exp $"); 42 43 #include "opt_ddb.h" 44 #include "opt_kgdb.h" 45 #include "opt_compat_sunos.h" 46 #include "opt_panicbutton.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/proc.h> 52 #include <sys/buf.h> 53 #include <sys/reboot.h> 54 #include <sys/conf.h> 55 #include <sys/file.h> 56 #include <sys/device.h> 57 #include <sys/malloc.h> 58 #include <sys/mbuf.h> 59 #include <sys/msgbuf.h> 60 #include <sys/ioctl.h> 61 #include <sys/tty.h> 62 #include <sys/mount.h> 63 #include <sys/user.h> 64 #include <sys/exec.h> 65 #include <sys/core.h> 66 #include <sys/kcore.h> 67 #include <sys/vnode.h> 68 #include <sys/sa.h> 69 #include <sys/syscallargs.h> 70 #include <sys/ksyms.h> 71 #ifdef KGDB 72 #include <sys/kgdb.h> 73 #endif 74 #include <sys/boot_flag.h> 75 76 #include <uvm/uvm_extern.h> 77 78 #include <sys/sysctl.h> 79 80 #include <machine/cpu.h> 81 #include <machine/reg.h> 82 #include <machine/psl.h> 83 #include <machine/pte.h> 84 #include <machine/kcore.h> /* XXX should be pulled in by sys/kcore.h */ 85 86 #include <dev/cons.h> 87 88 #if defined(DDB) 89 #include <machine/db_machdep.h> 90 #include <ddb/db_sym.h> 91 #include <ddb/db_extern.h> 92 #endif 93 94 #include "ksyms.h" 95 96 /* 97 * Info for CTL_HW 98 */ 99 char machine[] = MACHINE; 100 char cpu_model[60]; 101 102 /* Our exported CPU info; we can have only one. */ 103 struct cpu_info cpu_info_store; 104 105 extern char kernel_text[]; 106 extern char etext[]; 107 108 struct vm_map *exec_map = NULL; 109 struct vm_map *mb_map = NULL; 110 struct vm_map *phys_map = NULL; 111 112 caddr_t msgbufaddr; 113 int maxmem; /* max memory per process */ 114 int physmem; /* set by locore */ 115 /* 116 * safepri is a safe priority for sleep to set for a spin-wait 117 * during autoconfiguration or after a panic. 118 */ 119 int safepri = PSL_LOWIPL; 120 121 void luna68k_init __P((void)); 122 void identifycpu __P((void)); 123 void dumpsys __P((void)); 124 125 void straytrap __P((int, u_short)); 126 void nmihand __P((struct frame)); 127 128 int cpu_dumpsize __P((void)); 129 int cpu_dump __P((int (*)(dev_t, daddr_t, caddr_t, size_t), daddr_t *)); 130 void cpu_init_kcore_hdr __P((void)); 131 132 /* 133 * Machine-independent crash dump header info. 134 */ 135 cpu_kcore_hdr_t cpu_kcore_hdr; 136 137 int machtype; /* model: 1 for LUNA-1, 2 for LUNA-2 */ 138 int sysconsole; /* console: 0 for ttya, 1 for video */ 139 140 extern struct consdev syscons; 141 extern void omfb_cnattach __P((void)); 142 extern void ws_cnattach __P((void)); 143 extern void syscnattach __P((int)); 144 145 /* 146 * On the 68020/68030, the value of delay_divisor is roughly 147 * 2048 / cpuspeed (where cpuspeed is in MHz). 148 * 149 * On the 68040/68060(?), the value of delay_divisor is roughly 150 * 759 / cpuspeed (where cpuspeed is in MHz). 151 * XXX -- is the above formula correct? 152 */ 153 int cpuspeed = 25; /* only used for printing later */ 154 int delay_divisor = 300; /* for delay() loop count */ 155 156 /* 157 * Early initialization, before main() is called. 158 */ 159 void 160 luna68k_init() 161 { 162 volatile unsigned char *pio0 = (void *)0x49000000; 163 int sw1, i; 164 char *cp; 165 extern char bootarg[64]; 166 167 extern paddr_t avail_start, avail_end; 168 169 /* 170 * Tell the VM system about available physical memory. The 171 * luna68k only has one segment. 172 */ 173 uvm_page_physload(atop(avail_start), atop(avail_end), 174 atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT); 175 176 /* 177 * Initialize error message buffer (at end of core). 178 * avail_end was pre-decremented in pmap_bootstrap to compensate. 179 */ 180 for (i = 0; i < btoc(MSGBUFSIZE); i++) 181 pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * PAGE_SIZE, 182 avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 183 VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED); 184 pmap_update(pmap_kernel()); 185 initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE)); 186 187 188 pio0[3] = 0xb6; 189 pio0[2] = 1 << 6; /* enable parity check */ 190 pio0[3] = 0xb6; 191 sw1 = pio0[0]; /* dipssw1 value */ 192 sw1 ^= 0xff; 193 sysconsole = !(sw1 & 0x2); /* console selection */ 194 195 boothowto = 0; 196 i = 0; 197 /* 198 * 'bootarg' has; 199 * "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>" 200 * where <addr> is MAC address of which network loader used (not 201 * necessarily same as one at 0x4101.FFE0), <host> and <name> 202 * are the values of HOST and SERVER environment variables, 203 * 204 * NetBSD/luna68k cares only the first argment; any of "sda". 205 */ 206 for (cp = bootarg; *cp != ' '; cp++) { 207 BOOT_FLAG(*cp, boothowto); 208 if (i++ >= sizeof(bootarg)) 209 break; 210 } 211 #if 0 /* overload 1:sw1, which now means 'go ROM monitor' after poweron */ 212 if (boothowto == 0) 213 boothowto = (sw1 & 0x1) ? RB_SINGLE : 0; 214 #endif 215 } 216 217 /* 218 * Console initialization: called early on from main, 219 */ 220 void 221 consinit() 222 { 223 if (sysconsole == 0) 224 syscnattach(0); 225 else { 226 omfb_cnattach(); 227 ws_cnattach(); 228 } 229 230 #if NKSYMS || defined(DDB) || defined(LKM) 231 { 232 extern int end; 233 extern int *esym; 234 235 ksyms_init(*(int *)&end, ((int *)&end) + 1, esym); 236 } 237 #endif 238 #ifdef DDB 239 if (boothowto & RB_KDB) 240 cpu_Debugger(); 241 #endif 242 } 243 244 /* 245 * cpu_startup: allocate memory for variable-sized tables. 246 */ 247 void 248 cpu_startup() 249 { 250 vaddr_t minaddr, maxaddr; 251 char pbuf[9]; 252 extern void greeting __P((void)); 253 254 if (fputype != FPU_NONE) 255 m68k_make_fpu_idle_frame(); 256 257 /* 258 * Initialize the kernel crash dump header. 259 */ 260 cpu_init_kcore_hdr(); 261 262 /* 263 * Good {morning,afternoon,evening,night}. 264 */ 265 printf(version); 266 identifycpu(); 267 268 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 269 printf("total memory = %s\n", pbuf); 270 271 minaddr = 0; 272 /* 273 * Allocate a submap for exec arguments. This map effectively 274 * limits the number of processes exec'ing at any time. 275 */ 276 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 277 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 278 279 /* 280 * Allocate a submap for physio 281 */ 282 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 283 VM_PHYS_SIZE, 0, FALSE, NULL); 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 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 293 printf("avail memory = %s\n", pbuf); 294 295 /* 296 * Tell the VM system that the area before the text segment 297 * is invalid. 298 * 299 * XXX Should just change KERNBASE and VM_MIN_KERNEL_ADDRESS, 300 * XXX but not right now. 301 */ 302 if (uvm_map_protect(kernel_map, 0, round_page((vaddr_t)&kernel_text), 303 UVM_PROT_NONE, TRUE) != 0) 304 panic("can't mark pre-text pages off-limits"); 305 306 /* 307 * Tell the VM system that writing to kernel text isn't allowed. 308 * If we don't, we might end up COW'ing the text segment! 309 */ 310 if (uvm_map_protect(kernel_map, trunc_page((vaddr_t)&kernel_text), 311 trunc_page((vaddr_t)&etext), UVM_PROT_READ|UVM_PROT_EXEC, TRUE) 312 != 0) 313 panic("can't protect kernel text"); 314 315 /* 316 * Say "Hi" to the world 317 */ 318 greeting(); 319 } 320 321 /* 322 * Set registers on exec. 323 */ 324 void 325 setregs(l, pack, stack) 326 struct lwp *l; 327 struct exec_package *pack; 328 u_long stack; 329 { 330 struct frame *frame = (struct frame *)l->l_md.md_regs; 331 extern int fputype; 332 333 frame->f_sr = PSL_USERSET; 334 frame->f_pc = pack->ep_entry & ~1; 335 frame->f_regs[D0] = 0; 336 frame->f_regs[D1] = 0; 337 frame->f_regs[D2] = 0; 338 frame->f_regs[D3] = 0; 339 frame->f_regs[D4] = 0; 340 frame->f_regs[D5] = 0; 341 frame->f_regs[D6] = 0; 342 frame->f_regs[D7] = 0; 343 frame->f_regs[A0] = 0; 344 frame->f_regs[A1] = 0; 345 frame->f_regs[A2] = (int)l->l_proc->p_psstr; 346 frame->f_regs[A3] = 0; 347 frame->f_regs[A4] = 0; 348 frame->f_regs[A5] = 0; 349 frame->f_regs[A6] = 0; 350 frame->f_regs[SP] = stack; 351 352 /* restore a null state frame */ 353 l->l_addr->u_pcb.pcb_fpregs.fpf_null = 0; 354 if (fputype) 355 m68881_restore(&l->l_addr->u_pcb.pcb_fpregs); 356 } 357 358 void 359 identifycpu() 360 { 361 extern int cputype; 362 char *cpu; 363 364 bzero(cpu_model, sizeof(cpu_model)); 365 switch (cputype) { 366 case CPU_68030: 367 cpu = "MC68030 CPU+MMU, MC68882 FPU"; 368 machtype = LUNA_I; 369 cpuspeed = 20; delay_divisor = 102; /* 20MHz 68030 */ 370 hz = 60; 371 break; 372 #if defined(M68040) 373 case CPU_68040: 374 cpu = "MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches"; 375 machtype = LUNA_II; 376 cpuspeed = 25; delay_divisor = 300; /* 25MHz 68040 */ 377 break; 378 #endif 379 default: 380 panic("unknown CPU type"); 381 } 382 strcpy(cpu_model, cpu); 383 printf("%s\n", cpu_model); 384 } 385 386 /* 387 * machine dependent system variables. 388 */ 389 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 390 { 391 392 sysctl_createv(SYSCTL_PERMANENT, 393 CTLTYPE_NODE, "machdep", NULL, 394 NULL, 0, NULL, 0, 395 CTL_MACHDEP, CTL_EOL); 396 397 sysctl_createv(SYSCTL_PERMANENT, 398 CTLTYPE_STRUCT, "console_device", NULL, 399 sysctl_consdev, 0, NULL, sizeof(dev_t), 400 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 401 } 402 403 int waittime = -1; 404 405 void 406 cpu_reboot(howto, bootstr) 407 volatile int howto; /* XXX to shutup GCC XXX */ 408 char *bootstr; 409 { 410 extern void doboot __P((void)); 411 412 /* take a snap shot before clobbering any registers */ 413 if (curlwp && curlwp->l_addr) 414 savectx(&curlwp->l_addr->u_pcb); 415 416 /* If system is hold, just halt. */ 417 if (cold) { 418 howto |= RB_HALT; 419 goto haltsys; 420 } 421 422 boothowto = howto; 423 if ((howto & RB_NOSYNC) == 0 && waittime < 0) { 424 waittime = 0; 425 vfs_shutdown(); 426 /* 427 * If we've been adjusting the clock, the todr 428 * will be out of synch; adjust it now. 429 */ 430 resettodr(); 431 } 432 433 /* Disable interrupts. */ 434 splhigh(); 435 436 /* If rebooting and a dump is requested, do it. */ 437 if (howto & RB_DUMP) 438 dumpsys(); 439 440 haltsys: 441 /* Run any shutdown hooks. */ 442 doshutdownhooks(); 443 444 /* Finally, halt/reboot the system. */ 445 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 446 u_int8_t *pio = (void *)0x4d000000; 447 448 printf("power is going down.\n"); 449 DELAY(100000); 450 pio[3] = 0x94; 451 pio[2] = 0 << 4; 452 for (;;) /* NOP */; 453 } 454 if (howto & RB_HALT) { 455 printf("System halted. Hit any key to reboot.\n\n"); 456 (void)cngetc(); 457 } 458 459 printf("rebooting...\n"); 460 DELAY(100000); 461 doboot(); 462 /*NOTREACHED*/ 463 while (1) ; 464 } 465 466 /* 467 * Initialize the kernel crash dump header. 468 */ 469 void 470 cpu_init_kcore_hdr() 471 { 472 cpu_kcore_hdr_t *h = &cpu_kcore_hdr; 473 struct m68k_kcore_hdr *m = &h->un._m68k; 474 extern char end[]; 475 476 bzero(&cpu_kcore_hdr, sizeof(cpu_kcore_hdr)); 477 478 /* 479 * Initialize the `dispatcher' portion of the header. 480 */ 481 strcpy(h->name, machine); 482 h->page_size = PAGE_SIZE; 483 h->kernbase = KERNBASE; 484 485 /* 486 * Fill in information about our MMU configuration. 487 */ 488 m->mmutype = mmutype; 489 m->sg_v = SG_V; 490 m->sg_frame = SG_FRAME; 491 m->sg_ishift = SG_ISHIFT; 492 m->sg_pmask = SG_PMASK; 493 m->sg40_shift1 = SG4_SHIFT1; 494 m->sg40_mask2 = SG4_MASK2; 495 m->sg40_shift2 = SG4_SHIFT2; 496 m->sg40_mask3 = SG4_MASK3; 497 m->sg40_shift3 = SG4_SHIFT3; 498 m->sg40_addr1 = SG4_ADDR1; 499 m->sg40_addr2 = SG4_ADDR2; 500 m->pg_v = PG_V; 501 m->pg_frame = PG_FRAME; 502 503 /* 504 * Initialize pointer to kernel segment table. 505 */ 506 m->sysseg_pa = (u_int32_t)(pmap_kernel()->pm_stpa); 507 508 /* 509 * Initialize relocation value such that: 510 * 511 * pa = (va - KERNBASE) + reloc 512 * 513 * Since we're linked and loaded at the same place, 514 * and the kernel is mapped va == pa, this is 0. 515 */ 516 m->reloc = 0; 517 518 /* 519 * Define the end of the relocatable range. 520 */ 521 m->relocend = (u_int32_t)end; 522 523 /* 524 * The luna68k has one contiguous memory segment. 525 */ 526 m->ram_segs[0].start = 0 /* lowram */; 527 m->ram_segs[0].size = ctob(physmem); 528 } 529 530 /* 531 * Compute the size of the machine-dependent crash dump header. 532 * Returns size in disk blocks. 533 */ 534 int 535 cpu_dumpsize() 536 { 537 int size; 538 539 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)); 540 return (btodb(roundup(size, dbtob(1)))); 541 } 542 543 /* 544 * Called by dumpsys() to dump the machine-dependent header. 545 */ 546 int 547 cpu_dump(dump, blknop) 548 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 549 daddr_t *blknop; 550 { 551 int buf[dbtob(1) / sizeof(int)]; 552 cpu_kcore_hdr_t *chdr; 553 kcore_seg_t *kseg; 554 int error; 555 556 kseg = (kcore_seg_t *)buf; 557 chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) / 558 sizeof(int)]; 559 560 /* Create the segment header. */ 561 CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 562 kseg->c_size = dbtob(1) - ALIGN(sizeof(kcore_seg_t)); 563 564 bcopy(&cpu_kcore_hdr, chdr, sizeof(cpu_kcore_hdr_t)); 565 error = (*dump)(dumpdev, *blknop, (caddr_t)buf, sizeof(buf)); 566 *blknop += btodb(sizeof(buf)); 567 return (error); 568 } 569 570 /* 571 * These variables are needed by /sbin/savecore 572 */ 573 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 574 int dumpsize = 0; /* pages */ 575 long dumplo = 0; /* blocks */ 576 577 /* 578 * This is called by main to set dumplo and dumpsize. 579 * Dumps always skip the first PAGE_SIZE of disk space 580 * in case there might be a disk label stored there. 581 * If there is extra space, put dump at the end to 582 * reduce the chance that swapping trashes it. 583 */ 584 void 585 cpu_dumpconf() 586 { 587 const struct bdevsw *bdev; 588 int chdrsize; /* size of dump header */ 589 int nblks; /* size of dump area */ 590 591 if (dumpdev == NODEV) 592 return; 593 bdev = bdevsw_lookup(dumpdev); 594 if (bdev == NULL) 595 panic("dumpconf: bad dumpdev=0x%x", dumpdev); 596 if (bdev->d_psize == NULL) 597 return; 598 nblks = (*bdev->d_psize)(dumpdev); 599 chdrsize = cpu_dumpsize(); 600 601 dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size); 602 603 /* 604 * Check do see if we will fit. Note we always skip the 605 * first PAGE_SIZE in case there is a disk label there. 606 */ 607 if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) { 608 dumpsize = 0; 609 dumplo = -1; 610 return; 611 } 612 613 /* 614 * Put dump at the end of the partition. 615 */ 616 dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize; 617 } 618 619 /* 620 * Dump physical memory onto the dump device. Called by cpu_reboot(). 621 */ 622 void 623 dumpsys() 624 { 625 const struct bdevsw *bdev; 626 daddr_t blkno; /* current block to write */ 627 /* dump routine */ 628 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 629 int pg; /* page being dumped */ 630 paddr_t maddr; /* PA being dumped */ 631 int error; /* error code from (*dump)() */ 632 633 /* XXX initialized here because of gcc lossage */ 634 maddr = 0 /* lowram */; 635 pg = 0; 636 637 /* Make sure dump device is valid. */ 638 if (dumpdev == NODEV) 639 return; 640 bdev = bdevsw_lookup(dumpdev); 641 if (bdev == NULL) 642 return; 643 if (dumpsize == 0) { 644 cpu_dumpconf(); 645 if (dumpsize == 0) 646 return; 647 } 648 if (dumplo <= 0) { 649 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 650 minor(dumpdev)); 651 return; 652 } 653 dump = bdev->d_dump; 654 blkno = dumplo; 655 656 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 657 minor(dumpdev), dumplo); 658 659 printf("dump "); 660 661 /* Write the dump header. */ 662 error = cpu_dump(dump, &blkno); 663 if (error) 664 goto bad; 665 666 for (pg = 0; pg < dumpsize; pg++) { 667 #define NPGMB (1024*1024/PAGE_SIZE) 668 /* print out how many MBs we have dumped */ 669 if (pg && (pg % NPGMB) == 0) 670 printf("%d ", pg / NPGMB); 671 #undef NPGMB 672 pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr, 673 VM_PROT_READ, VM_PROT_READ|PMAP_WIRED); 674 675 pmap_update(pmap_kernel()); 676 error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE); 677 bad: 678 switch (error) { 679 case 0: 680 maddr += PAGE_SIZE; 681 blkno += btodb(PAGE_SIZE); 682 break; 683 684 case ENXIO: 685 printf("device bad\n"); 686 return; 687 688 case EFAULT: 689 printf("device not ready\n"); 690 return; 691 692 case EINVAL: 693 printf("area improper\n"); 694 return; 695 696 case EIO: 697 printf("i/o error\n"); 698 return; 699 700 case EINTR: 701 printf("aborted from console\n"); 702 return; 703 704 default: 705 printf("error %d\n", error); 706 return; 707 } 708 } 709 printf("succeeded\n"); 710 } 711 712 void 713 straytrap(pc, evec) 714 int pc; 715 u_short evec; 716 { 717 printf("unexpected trap (vector offset %x) from %x\n", 718 evec & 0xFFF, pc); 719 } 720 721 int *nofault; 722 723 int 724 badaddr(addr, nbytes) 725 register caddr_t addr; 726 int nbytes; 727 { 728 register int i; 729 label_t faultbuf; 730 731 #ifdef lint 732 i = *addr; if (i) return (0); 733 #endif 734 735 nofault = (int *) &faultbuf; 736 if (setjmp((label_t *)nofault)) { 737 nofault = (int *) 0; 738 return(1); 739 } 740 741 switch (nbytes) { 742 case 1: 743 i = *(volatile char *)addr; 744 break; 745 746 case 2: 747 i = *(volatile short *)addr; 748 break; 749 750 case 4: 751 i = *(volatile int *)addr; 752 break; 753 754 default: 755 panic("badaddr: bad request"); 756 } 757 nofault = (int *) 0; 758 return (0); 759 } 760 761 void luna68k_abort __P((char *)); 762 763 static int innmihand; /* simple mutex */ 764 765 /* 766 * Level 7 interrupts are caused by e.g. the ABORT switch. 767 * 768 * If we have DDB, then break into DDB on ABORT. In a production 769 * environment, bumping the ABORT switch would be bad, so we enable 770 * panic'ing on ABORT with the kernel option "PANICBUTTON". 771 */ 772 void 773 nmihand(frame) 774 struct frame frame; 775 { 776 /* Prevent unwanted recursion */ 777 if (innmihand) 778 return; 779 innmihand = 1; 780 781 luna68k_abort("ABORT SWITCH"); 782 } 783 784 /* 785 * Common code for handling ABORT signals from buttons, switches, 786 * serial lines, etc. 787 */ 788 void 789 luna68k_abort(cp) 790 char *cp; 791 { 792 #ifdef DDB 793 printf("%s\n", cp); 794 cpu_Debugger(); 795 #else 796 #ifdef PANICBUTTON 797 panic(cp); 798 #else 799 printf("%s ignored\n", cp); 800 #endif /* PANICBUTTON */ 801 #endif /* DDB */ 802 } 803 804 /* 805 * cpu_exec_aout_makecmds(): 806 * CPU-dependent a.out format hook for execve(). 807 * 808 * Determine of the given exec package refers to something which we 809 * understand and, if so, set up the vmcmds for it. 810 */ 811 int 812 cpu_exec_aout_makecmds(p, epp) 813 struct proc *p; 814 struct exec_package *epp; 815 { 816 int error = ENOEXEC; 817 #ifdef COMPAT_SUNOS 818 extern sunos_exec_aout_makecmds 819 __P((struct proc *, struct exec_package *)); 820 if ((error = sunos_exec_aout_makecmds(p, epp)) == 0) 821 return 0; 822 #endif 823 return error; 824 } 825 826 /* 827 * Return the best possible estimate of the time in the timeval 828 * to which tvp points. Unfortunately, we can't read the hardware registers. 829 * We guarantee that the time will be greater than the value obtained by a 830 * previous call. 831 */ 832 void 833 microtime(tvp) 834 register struct timeval *tvp; 835 { 836 int s = splclock(); 837 static struct timeval lasttime; 838 839 *tvp = time; 840 #ifdef notdef 841 tvp->tv_usec += clkread(); 842 while (tvp->tv_usec >= 1000000) { 843 tvp->tv_sec++; 844 tvp->tv_usec -= 1000000; 845 } 846 #endif 847 if (tvp->tv_sec == lasttime.tv_sec && 848 tvp->tv_usec <= lasttime.tv_usec && 849 (tvp->tv_usec = lasttime.tv_usec + 1) >= 1000000) { 850 tvp->tv_sec++; 851 tvp->tv_usec -= 1000000; 852 } 853 lasttime = *tvp; 854 splx(s); 855 } 856 857 #if 1 858 859 struct consdev *cn_tab = &syscons; 860 861 #else 862 863 /* 864 * romcons is useful until m68k TC register is initialized. 865 */ 866 int romcngetc __P((dev_t)); 867 void romcnputc __P((dev_t, int)); 868 869 struct consdev romcons = { 870 NULL, 871 NULL, 872 romcngetc, 873 romcnputc, 874 nullcnpollc, 875 makedev(7, 0), /* XXX */ 876 CN_DEAD, 877 }; 878 struct consdev *cn_tab = &romcons; 879 880 #define __ ((int **)0x41000000) 881 #define GETC() (*(int (*)())__[6])() 882 #define PUTC(x) (*(void (*)())__[7])(x) 883 884 #define ROMPUTC(x) \ 885 ({ \ 886 register _r; \ 887 asm volatile (" \ 888 movc %%vbr,%0 ; \ 889 movel %0,%%sp@- ; \ 890 clrl %0 ; \ 891 movc %0,%%vbr" \ 892 : "=r" (_r)); \ 893 PUTC(x); \ 894 asm volatile (" \ 895 movel %%sp@+,%0 ; \ 896 movc %0,%%vbr" \ 897 : "=r" (_r)); \ 898 }) 899 900 #define ROMGETC() \ 901 ({ \ 902 register _r, _c; \ 903 asm volatile (" \ 904 movc %%vbr,%0 ; \ 905 movel %0,%%sp@- ; \ 906 clrl %0 ; \ 907 movc %0,%%vbr" \ 908 : "=r" (_r)); \ 909 _c = GETC(); \ 910 asm volatile (" \ 911 movel %%sp@+,%0 ; \ 912 movc %0,%%vbr" \ 913 : "=r" (_r)); \ 914 _c; \ 915 }) 916 917 void 918 romcnputc(dev, c) 919 dev_t dev; 920 int c; 921 { 922 int s; 923 924 s = splhigh(); 925 ROMPUTC(c); 926 splx(s); 927 } 928 929 int 930 romcngetc(dev) 931 dev_t dev; 932 { 933 int s, c; 934 935 do { 936 s = splhigh(); 937 c = ROMGETC(); 938 splx(s); 939 } while (c == -1); 940 return c; 941 } 942 #endif 943
Indexes created Tue Sep 30 20:09:53 GMT 2025