machdep.c revision 1.99
1 /* $NetBSD: machdep.c,v 1.99 2015/08/21 10:48:06 christos 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 33 34 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.99 2015/08/21 10:48:06 christos Exp $"); 35 36 #include "opt_ddb.h" 37 #include "opt_kgdb.h" 38 #include "opt_compat_sunos.h" 39 #include "opt_modular.h" 40 #include "opt_panicbutton.h" 41 #include "opt_m68k_arch.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/proc.h> 47 #include <sys/buf.h> 48 #include <sys/reboot.h> 49 #include <sys/conf.h> 50 #include <sys/file.h> 51 #include <sys/device.h> 52 #include <sys/malloc.h> 53 #include <sys/mbuf.h> 54 #include <sys/msgbuf.h> 55 #include <sys/ioctl.h> 56 #include <sys/tty.h> 57 #include <sys/mount.h> 58 #include <sys/exec.h> 59 #include <sys/exec_aout.h> /* for MID_* */ 60 #include <sys/core.h> 61 #include <sys/kauth.h> 62 #include <sys/kcore.h> 63 #include <sys/vnode.h> 64 #include <sys/syscallargs.h> 65 #include <sys/ksyms.h> 66 #include <sys/module.h> 67 #ifdef KGDB 68 #include <sys/kgdb.h> 69 #endif 70 #include <sys/boot_flag.h> 71 #define ELFSIZE 32 72 #include <sys/exec_elf.h> 73 #include <sys/cpu.h> 74 75 #include <uvm/uvm_extern.h> 76 77 #include <sys/sysctl.h> 78 79 #include <machine/bootinfo.h> 80 #include <machine/cpu.h> 81 #include <machine/reg.h> 82 #include <machine/pcb.h> 83 #include <machine/psl.h> 84 #include <machine/pte.h> 85 #include <machine/kcore.h> /* XXX should be pulled in by sys/kcore.h */ 86 87 #include <luna68k/dev/syscn.h> 88 89 #include <dev/cons.h> 90 #include <dev/mm.h> 91 92 #if defined(DDB) 93 #include <machine/db_machdep.h> 94 #include <ddb/db_sym.h> 95 #include <ddb/db_extern.h> 96 #endif 97 98 #include "ksyms.h" 99 100 /* 101 * Info for CTL_HW 102 */ 103 char machine[] = MACHINE; 104 105 /* Our exported CPU info; we can have only one. */ 106 struct cpu_info cpu_info_store; 107 108 struct vm_map *phys_map = NULL; 109 110 int maxmem; /* max memory per process */ 111 112 extern u_int lowram; 113 114 void luna68k_init(void); 115 void identifycpu(void); 116 void dumpsys(void); 117 118 void straytrap(int, u_short); 119 void nmihand(struct frame); 120 121 int cpu_dumpsize(void); 122 int cpu_dump(int (*)(dev_t, daddr_t, void *, size_t), daddr_t *); 123 void cpu_init_kcore_hdr(void); 124 125 #if NKSYMS || defined(DDB) || defined(MODULAR) 126 vsize_t symtab_size(vaddr_t); 127 #endif 128 extern char end[]; 129 extern void *esym; 130 131 /* 132 * Machine-independent crash dump header info. 133 */ 134 cpu_kcore_hdr_t cpu_kcore_hdr; 135 136 int machtype; /* model: 1 for LUNA-1, 2 for LUNA-2 */ 137 int sysconsole; /* console: 0 for ttya, 1 for video */ 138 139 extern struct consdev syscons; 140 extern void omfb_cnattach(void); 141 extern void ws_cnattach(void); 142 143 /* 144 * On the 68020/68030, the value of delay_divisor is roughly 145 * 2048 / cpuspeed (where cpuspeed is in MHz). 146 * 147 * On the 68040/68060(?), the value of delay_divisor is roughly 148 * 759 / cpuspeed (where cpuspeed is in MHz). 149 * XXX -- is the above formula correct? 150 */ 151 int cpuspeed = 25; /* only used for printing later */ 152 int delay_divisor = 30; /* for delay() loop count */ 153 154 /* 155 * Early initialization, before main() is called. 156 */ 157 void 158 luna68k_init(void) 159 { 160 volatile uint8_t *pio0 = (void *)0x49000000; 161 int sw1, i; 162 char *cp; 163 extern char bootarg[64]; 164 165 extern paddr_t avail_start, avail_end; 166 167 /* initialize cn_tab for early console */ 168 #if 1 169 cn_tab = &syscons; 170 #else 171 cn_tab = &romcons; 172 #endif 173 174 /* 175 * Tell the VM system about available physical memory. The 176 * luna68k only has one segment. 177 */ 178 uvm_page_physload(atop(avail_start), atop(avail_end), 179 atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT); 180 181 /* 182 * Initialize error message buffer (at end of core). 183 * avail_end was pre-decremented in pmap_bootstrap to compensate. 184 */ 185 for (i = 0; i < btoc(MSGBUFSIZE); i++) 186 pmap_kenter_pa((vaddr_t)msgbufaddr + i * PAGE_SIZE, 187 avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0); 188 pmap_update(pmap_kernel()); 189 initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE)); 190 191 192 pio0[3] = 0xb6; 193 pio0[2] = 1 << 6; /* enable parity check */ 194 pio0[3] = 0xb6; 195 sw1 = pio0[0]; /* dip sw1 value */ 196 sw1 ^= 0xff; 197 sysconsole = !(sw1 & 0x2); /* console selection */ 198 199 /* 200 * Check if boothowto and bootdev values are passed by our bootloader. 201 */ 202 if ((bootdev & B_MAGICMASK) == B_DEVMAGIC) { 203 /* Valid value is set; no need to parse bootarg. */ 204 return; 205 } 206 207 /* 208 * No valid bootdev value is set. 209 * Assume we are booted by ROM monitor directly using a.out kernel 210 * and we have to parse bootarg passed from the monitor to set 211 * proper boothowto and check netboot. 212 */ 213 214 /* set default to "sd0a" with no howto flags */ 215 bootdev = MAKEBOOTDEV(0, LUNA68K_BOOTADPT_SPC, 0, 0, 0); 216 boothowto = 0; 217 218 /* 219 * 'bootarg' on LUNA has: 220 * "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>" 221 * where <addr> is MAC address of which network loader used (not 222 * necessarily same as one at 0x4101.FFE0), <host> and <name> 223 * are the values of HOST and SERVER environment variables. 224 * 225 * 'bootarg' on LUNA-II has "<args of x command>" only. 226 * 227 * NetBSD/luna68k cares only the first argment; any of "sda". 228 */ 229 bootarg[63] = '\0'; 230 for (cp = bootarg; *cp != '\0'; cp++) { 231 if (*cp == '-') { 232 char c; 233 while ((c = *cp) != '\0' && c != ' ') { 234 BOOT_FLAG(c, boothowto); 235 cp++; 236 } 237 } else if (*cp == 'E' && memcmp("ENADDR=", cp, 7) == 0) { 238 bootdev = 239 MAKEBOOTDEV(0, LUNA68K_BOOTADPT_LANCE, 0, 0, 0); 240 } 241 } 242 } 243 244 /* 245 * Console initialization: called early on from main, 246 */ 247 void 248 consinit(void) 249 { 250 251 if (sysconsole == 0) 252 syscninit(0); 253 else { 254 omfb_cnattach(); 255 ws_cnattach(); 256 } 257 258 #if NKSYMS || defined(DDB) || defined(MODULAR) 259 ksyms_addsyms_elf((esym != NULL) ? 1 : 0, (void *)&end, esym); 260 #endif 261 #ifdef DDB 262 if (boothowto & RB_KDB) 263 cpu_Debugger(); 264 #endif 265 } 266 267 #if NKSYMS || defined(DDB) || defined(MODULAR) 268 269 /* 270 * Check and compute size of DDB symbols and strings. 271 * 272 * Note this function could be called from locore.s before MMU is turned on 273 * so we should avoid global variables and function calls. 274 */ 275 vsize_t 276 symtab_size(vaddr_t hdr) 277 { 278 int i; 279 Elf_Ehdr *ehdr; 280 Elf_Shdr *shp; 281 vaddr_t maxsym; 282 283 /* 284 * Check the ELF headers. 285 */ 286 287 ehdr = (void *)hdr; 288 if (ehdr->e_ident[EI_MAG0] != ELFMAG0 || 289 ehdr->e_ident[EI_MAG1] != ELFMAG1 || 290 ehdr->e_ident[EI_MAG2] != ELFMAG2 || 291 ehdr->e_ident[EI_MAG3] != ELFMAG3 || 292 ehdr->e_ident[EI_CLASS] != ELFCLASS32) { 293 return 0; 294 } 295 296 /* 297 * Find the end of the symbols and strings. 298 */ 299 300 maxsym = 0; 301 shp = (Elf_Shdr *)(hdr + ehdr->e_shoff); 302 for (i = 0; i < ehdr->e_shnum; i++) { 303 if (shp[i].sh_type != SHT_SYMTAB && 304 shp[i].sh_type != SHT_STRTAB) { 305 continue; 306 } 307 maxsym = max(maxsym, shp[i].sh_offset + shp[i].sh_size); 308 } 309 310 return maxsym; 311 } 312 #endif /* NKSYMS || defined(DDB) || defined(MODULAR) */ 313 314 /* 315 * cpu_startup: allocate memory for variable-sized tables. 316 */ 317 void 318 cpu_startup(void) 319 { 320 vaddr_t minaddr, maxaddr; 321 char pbuf[9]; 322 extern void greeting(void); 323 324 if (fputype != FPU_NONE) 325 m68k_make_fpu_idle_frame(); 326 327 /* 328 * Initialize the kernel crash dump header. 329 */ 330 cpu_init_kcore_hdr(); 331 332 /* 333 * Good {morning,afternoon,evening,night}. 334 */ 335 printf("%s%s", copyright, version); 336 identifycpu(); 337 338 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 339 printf("total memory = %s\n", pbuf); 340 341 minaddr = 0; 342 343 /* 344 * Allocate a submap for physio 345 */ 346 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 347 VM_PHYS_SIZE, 0, false, NULL); 348 349 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 350 printf("avail memory = %s\n", pbuf); 351 352 /* 353 * Say "Hi" to the world 354 */ 355 greeting(); 356 } 357 358 void 359 identifycpu(void) 360 { 361 extern int cputype; 362 const char *model, *fpu; 363 364 switch (cputype) { 365 case CPU_68030: 366 model ="LUNA-I"; 367 switch (fputype) { 368 case FPU_68881: 369 fpu = "MC68881"; 370 break; 371 case FPU_68882: 372 fpu = "MC68882"; 373 break; 374 case FPU_NONE: 375 fpu = "no"; 376 break; 377 default: 378 fpu = "unknown"; 379 break; 380 } 381 cpu_setmodel("%s (MC68030 CPU+MMU, %s FPU)", model, fpu); 382 machtype = LUNA_I; 383 /* 20MHz 68030 */ 384 cpuspeed = 20; 385 delay_divisor = 102; 386 hz = 60; 387 break; 388 #if defined(M68040) 389 case CPU_68040: 390 model ="LUNA-II"; 391 cpu_setmodel( 392 "%s (MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches)", 393 model); 394 machtype = LUNA_II; 395 /* 25MHz 68040 */ 396 cpuspeed = 25; 397 delay_divisor = 30; 398 /* hz = 100 on LUNA-II */ 399 break; 400 #endif 401 default: 402 panic("unknown CPU type"); 403 } 404 printf("%s\n", cpu_getmodel()); 405 } 406 407 /* 408 * machine dependent system variables. 409 */ 410 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 411 { 412 413 sysctl_createv(clog, 0, NULL, NULL, 414 CTLFLAG_PERMANENT, 415 CTLTYPE_NODE, "machdep", NULL, 416 NULL, 0, NULL, 0, 417 CTL_MACHDEP, CTL_EOL); 418 419 sysctl_createv(clog, 0, NULL, NULL, 420 CTLFLAG_PERMANENT, 421 CTLTYPE_STRUCT, "console_device", NULL, 422 sysctl_consdev, 0, NULL, sizeof(dev_t), 423 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 424 } 425 426 int waittime = -1; 427 428 void 429 cpu_reboot(int howto, char *bootstr) 430 { 431 struct pcb *pcb = lwp_getpcb(curlwp); 432 extern void doboot(void); 433 434 /* take a snap shot before clobbering any registers */ 435 if (pcb != NULL) 436 savectx(pcb); 437 438 /* If system is hold, just halt. */ 439 if (cold) { 440 howto |= RB_HALT; 441 goto haltsys; 442 } 443 444 boothowto = howto; 445 if ((howto & RB_NOSYNC) == 0 && waittime < 0) { 446 waittime = 0; 447 vfs_shutdown(); 448 /* 449 * If we've been adjusting the clock, the todr 450 * will be out of synch; adjust it now. 451 */ 452 resettodr(); 453 } 454 455 /* Disable interrupts. */ 456 splhigh(); 457 458 /* If rebooting and a dump is requested, do it. */ 459 if (howto & RB_DUMP) 460 dumpsys(); 461 462 haltsys: 463 /* Run any shutdown hooks. */ 464 doshutdownhooks(); 465 466 pmf_system_shutdown(boothowto); 467 468 /* Finally, halt/reboot the system. */ 469 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 470 volatile uint8_t *pio = (void *)0x4d000000; 471 472 printf("power is going down.\n"); 473 DELAY(100000); 474 pio[3] = 0x94; 475 pio[2] = 0 << 4; 476 for (;;) 477 /* NOP */; 478 } 479 if (howto & RB_HALT) { 480 printf("System halted. Hit any key to reboot.\n\n"); 481 (void)cngetc(); 482 } 483 484 printf("rebooting...\n"); 485 DELAY(100000); 486 doboot(); 487 /*NOTREACHED*/ 488 for (;;) 489 ; 490 } 491 492 /* 493 * Initialize the kernel crash dump header. 494 */ 495 void 496 cpu_init_kcore_hdr(void) 497 { 498 cpu_kcore_hdr_t *h = &cpu_kcore_hdr; 499 struct m68k_kcore_hdr *m = &h->un._m68k; 500 501 memset(&cpu_kcore_hdr, 0, sizeof(cpu_kcore_hdr)); 502 503 /* 504 * Initialize the `dispatcher' portion of the header. 505 */ 506 strcpy(h->name, machine); 507 h->page_size = PAGE_SIZE; 508 h->kernbase = KERNBASE; 509 510 /* 511 * Fill in information about our MMU configuration. 512 */ 513 m->mmutype = mmutype; 514 m->sg_v = SG_V; 515 m->sg_frame = SG_FRAME; 516 m->sg_ishift = SG_ISHIFT; 517 m->sg_pmask = SG_PMASK; 518 m->sg40_shift1 = SG4_SHIFT1; 519 m->sg40_mask2 = SG4_MASK2; 520 m->sg40_shift2 = SG4_SHIFT2; 521 m->sg40_mask3 = SG4_MASK3; 522 m->sg40_shift3 = SG4_SHIFT3; 523 m->sg40_addr1 = SG4_ADDR1; 524 m->sg40_addr2 = SG4_ADDR2; 525 m->pg_v = PG_V; 526 m->pg_frame = PG_FRAME; 527 528 /* 529 * Initialize pointer to kernel segment table. 530 */ 531 m->sysseg_pa = (uint32_t)(pmap_kernel()->pm_stpa); 532 533 /* 534 * Initialize relocation value such that: 535 * 536 * pa = (va - KERNBASE) + reloc 537 * 538 * Since we're linked and loaded at the same place, 539 * and the kernel is mapped va == pa, this is 0. 540 */ 541 m->reloc = 0; 542 543 /* 544 * Define the end of the relocatable range. 545 */ 546 m->relocend = (uint32_t)end; 547 548 /* 549 * The luna68k has one contiguous memory segment. 550 */ 551 m->ram_segs[0].start = 0 /* lowram */; 552 m->ram_segs[0].size = ctob(physmem); 553 } 554 555 /* 556 * Compute the size of the machine-dependent crash dump header. 557 * Returns size in disk blocks. 558 */ 559 560 #define CHDRSIZE (ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t))) 561 #define MDHDRSIZE roundup(CHDRSIZE, dbtob(1)) 562 563 int 564 cpu_dumpsize(void) 565 { 566 567 return btodb(MDHDRSIZE); 568 } 569 570 /* 571 * Called by dumpsys() to dump the machine-dependent header. 572 */ 573 int 574 cpu_dump(int (*dump)(dev_t, daddr_t, void *, size_t), daddr_t *blknop) 575 { 576 int buf[MDHDRSIZE / sizeof(int)]; 577 cpu_kcore_hdr_t *chdr; 578 kcore_seg_t *kseg; 579 int error; 580 581 kseg = (kcore_seg_t *)buf; 582 chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) / 583 sizeof(int)]; 584 585 /* Create the segment header. */ 586 CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 587 kseg->c_size = MDHDRSIZE - ALIGN(sizeof(kcore_seg_t)); 588 589 memcpy(chdr, &cpu_kcore_hdr, sizeof(cpu_kcore_hdr_t)); 590 error = (*dump)(dumpdev, *blknop, (void *)buf, sizeof(buf)); 591 *blknop += btodb(sizeof(buf)); 592 return error; 593 } 594 595 /* 596 * These variables are needed by /sbin/savecore 597 */ 598 uint32_t dumpmag = 0x8fca0101; /* magic number */ 599 int dumpsize = 0; /* pages */ 600 long dumplo = 0; /* blocks */ 601 602 /* 603 * This is called by main to set dumplo and dumpsize. 604 * Dumps always skip the first PAGE_SIZE of disk space 605 * in case there might be a disk label stored there. 606 * If there is extra space, put dump at the end to 607 * reduce the chance that swapping trashes it. 608 */ 609 void 610 cpu_dumpconf(void) 611 { 612 int chdrsize; /* size of dump header */ 613 int nblks; /* size of dump area */ 614 615 if (dumpdev == NODEV) 616 return; 617 nblks = bdev_size(dumpdev); 618 chdrsize = cpu_dumpsize(); 619 620 dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size); 621 622 /* 623 * Check do see if we will fit. Note we always skip the 624 * first PAGE_SIZE in case there is a disk label there. 625 */ 626 if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) { 627 dumpsize = 0; 628 dumplo = -1; 629 return; 630 } 631 632 /* 633 * Put dump at the end of the partition. 634 */ 635 dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize; 636 } 637 638 /* 639 * Dump physical memory onto the dump device. Called by cpu_reboot(). 640 */ 641 void 642 dumpsys(void) 643 { 644 const struct bdevsw *bdev; 645 daddr_t blkno; /* current block to write */ 646 /* dump routine */ 647 int (*dump)(dev_t, daddr_t, void *, size_t); 648 int pg; /* page being dumped */ 649 paddr_t maddr; /* PA being dumped */ 650 int error; /* error code from (*dump)() */ 651 652 /* XXX initialized here because of gcc lossage */ 653 maddr = 0 /* lowram */; 654 pg = 0; 655 656 /* Make sure dump device is valid. */ 657 if (dumpdev == NODEV) 658 return; 659 bdev = bdevsw_lookup(dumpdev); 660 if (bdev == NULL) 661 return; 662 if (dumpsize == 0) { 663 cpu_dumpconf(); 664 if (dumpsize == 0) 665 return; 666 } 667 if (dumplo <= 0) { 668 printf("\ndump to dev %u,%u not possible\n", 669 major(dumpdev), minor(dumpdev)); 670 return; 671 } 672 dump = bdev->d_dump; 673 blkno = dumplo; 674 675 printf("\ndumping to dev %u,%u offset %ld\n", 676 major(dumpdev), minor(dumpdev), dumplo); 677 678 printf("dump "); 679 680 /* Write the dump header. */ 681 error = cpu_dump(dump, &blkno); 682 if (error) 683 goto bad; 684 685 for (pg = 0; pg < dumpsize; pg++) { 686 #define NPGMB (1024*1024/PAGE_SIZE) 687 /* print out how many MBs we have dumped */ 688 if (pg && (pg % NPGMB) == 0) 689 printf("%d ", pg / NPGMB); 690 #undef NPGMB 691 pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr, 692 VM_PROT_READ, VM_PROT_READ|PMAP_WIRED); 693 694 pmap_update(pmap_kernel()); 695 error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE); 696 bad: 697 switch (error) { 698 case 0: 699 maddr += PAGE_SIZE; 700 blkno += btodb(PAGE_SIZE); 701 break; 702 703 case ENXIO: 704 printf("device bad\n"); 705 return; 706 707 case EFAULT: 708 printf("device not ready\n"); 709 return; 710 711 case EINVAL: 712 printf("area improper\n"); 713 return; 714 715 case EIO: 716 printf("i/o error\n"); 717 return; 718 719 case EINTR: 720 printf("aborted from console\n"); 721 return; 722 723 default: 724 printf("error %d\n", error); 725 return; 726 } 727 } 728 printf("succeeded\n"); 729 } 730 731 void 732 straytrap(int pc, u_short evec) 733 { 734 735 printf("unexpected trap (vector offset %x) from %x\n", 736 evec & 0xFFF, pc); 737 } 738 739 int *nofault; 740 741 int 742 badaddr(register void *addr, int nbytes) 743 { 744 int i; 745 label_t faultbuf; 746 747 nofault = (int *)&faultbuf; 748 if (setjmp((label_t *)nofault)) { 749 nofault = (int *)0; 750 return 1; 751 } 752 753 switch (nbytes) { 754 case 1: 755 i = *(volatile int8_t *)addr; 756 break; 757 758 case 2: 759 i = *(volatile int16_t *)addr; 760 break; 761 762 case 4: 763 i = *(volatile int32_t *)addr; 764 break; 765 766 default: 767 panic("badaddr: bad request"); 768 } 769 __USE(i); 770 nofault = (int *)0; 771 return 0; 772 } 773 774 void luna68k_abort(const char *); 775 776 static int innmihand; /* simple mutex */ 777 778 /* 779 * Level 7 interrupts are caused by e.g. the ABORT switch. 780 * 781 * If we have DDB, then break into DDB on ABORT. In a production 782 * environment, bumping the ABORT switch would be bad, so we enable 783 * panic'ing on ABORT with the kernel option "PANICBUTTON". 784 */ 785 void 786 nmihand(struct frame frame) 787 { 788 789 /* Prevent unwanted recursion */ 790 if (innmihand) 791 return; 792 innmihand = 1; 793 794 luna68k_abort("ABORT SWITCH"); 795 796 innmihand = 0; 797 } 798 799 /* 800 * Common code for handling ABORT signals from buttons, switches, 801 * serial lines, etc. 802 */ 803 void 804 luna68k_abort(const char *cp) 805 { 806 807 #ifdef DDB 808 printf("%s\n", cp); 809 cpu_Debugger(); 810 #else 811 #ifdef PANICBUTTON 812 panic(cp); 813 #else 814 printf("%s ignored\n", cp); 815 #endif /* PANICBUTTON */ 816 #endif /* DDB */ 817 } 818 819 /* 820 * cpu_exec_aout_makecmds(): 821 * CPU-dependent a.out format hook for execve(). 822 * 823 * Determine of the given exec package refers to something which we 824 * understand and, if so, set up the vmcmds for it. 825 */ 826 int 827 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp) 828 { 829 int error = ENOEXEC; 830 #ifdef COMPAT_SUNOS 831 extern sunos_exec_aout_makecmds(struct proc *, struct exec_package *); 832 833 if ((error = sunos_exec_aout_makecmds(l->l_proc, epp)) == 0) 834 return 0; 835 #endif 836 return error; 837 } 838 839 #ifdef MODULAR 840 /* 841 * Push any modules loaded by the bootloader etc. 842 */ 843 void 844 module_init_md(void) 845 { 846 } 847 #endif 848 849 #ifdef notyet 850 /* 851 * romcons is useful until m68k TC register is initialized. 852 */ 853 int romcngetc(dev_t); 854 void romcnputc(dev_t, int); 855 856 struct consdev romcons = { 857 NULL, 858 NULL, 859 romcngetc, 860 romcnputc, 861 nullcnpollc, 862 makedev(7, 0), /* XXX */ 863 CN_DEAD, 864 }; 865 866 #define __ ((int **)0x41000000) 867 #define GETC() (*(int (*)())__[6])() 868 #define PUTC(x) (*(void (*)())__[7])(x) 869 870 #define ROMPUTC(x) \ 871 ({ \ 872 register _r; \ 873 __asm volatile (" \ 874 movc %%vbr,%0 ; \ 875 movel %0,%%sp@- ; \ 876 clrl %0 ; \ 877 movc %0,%%vbr" \ 878 : "=r" (_r)); \ 879 PUTC(x); \ 880 __asm volatile (" \ 881 movel %%sp@+,%0 ; \ 882 movc %0,%%vbr" \ 883 : "=r" (_r)); \ 884 }) 885 886 #define ROMGETC() \ 887 ({ \ 888 register _r, _c; \ 889 __asm volatile (" \ 890 movc %%vbr,%0 ; \ 891 movel %0,%%sp@- ; \ 892 clrl %0 ; \ 893 movc %0,%%vbr" \ 894 : "=r" (_r)); \ 895 _c = GETC(); \ 896 __asm volatile (" \ 897 movel %%sp@+,%0 ; \ 898 movc %0,%%vbr" \ 899 : "=r" (_r)); \ 900 _c; \ 901 }) 902 903 void 904 romcnputc(dev_t dev, int c) 905 { 906 int s; 907 908 s = splhigh(); 909 ROMPUTC(c); 910 splx(s); 911 } 912 913 int 914 romcngetc(dev_t dev) 915 { 916 int s, c; 917 918 do { 919 s = splhigh(); 920 c = ROMGETC(); 921 splx(s); 922 } while (c == -1); 923 return c; 924 } 925 #endif 926 927 int 928 mm_md_physacc(paddr_t pa, vm_prot_t prot) 929 { 930 931 return (pa < lowram || pa >= 0xfffffffc) ? EFAULT : 0; 932 } 933
Indexes created Wed Oct 01 15:09:59 GMT 2025