machdep.c revision 1.107
1 /* $NetBSD: machdep.c,v 1.107 2021/09/25 15:18:38 tsutsui 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 1.107 2021/09/25 15:18:38 tsutsui 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 #include <sys/exec_elf.h> 72 #include <sys/cpu.h> 73 74 #include <uvm/uvm_extern.h> 75 76 #include <sys/sysctl.h> 77 78 #include <machine/bootinfo.h> 79 #include <machine/board.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/siottyvar.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 void omfb_cnattach(void); 140 extern void ws_cnattach(void); 141 142 /* 143 * On the 68020/68030, the value of delay_divisor is roughly 144 * 2048 / cpuspeed (where cpuspeed is in MHz). 145 * 146 * On the 68040/68060(?), the value of delay_divisor is roughly 147 * 759 / cpuspeed (where cpuspeed is in MHz). 148 * XXX -- is the above formula correct? 149 */ 150 int cpuspeed = 25; /* only used for printing later */ 151 int delay_divisor = 30; /* for delay() loop count */ 152 153 /* 154 * Early initialization, before main() is called. 155 */ 156 void 157 luna68k_init(void) 158 { 159 volatile uint8_t *pio0 = (void *)OBIO_PIO0_BASE; 160 int sw1, i; 161 char *cp; 162 extern char bootarg[64]; 163 164 extern paddr_t avail_start, avail_end; 165 166 /* initialize cn_tab for early console */ 167 #if 1 168 cn_tab = &siottycons; 169 #else 170 cn_tab = &romcons; 171 #endif 172 173 /* 174 * Tell the VM system about available physical memory. The 175 * luna68k only has one segment. 176 */ 177 uvm_page_physload(atop(avail_start), atop(avail_end), 178 atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT); 179 180 /* 181 * Initialize error message buffer (at end of core). 182 * avail_end was pre-decremented in pmap_bootstrap to compensate. 183 */ 184 for (i = 0; i < btoc(MSGBUFSIZE); i++) 185 pmap_kenter_pa((vaddr_t)msgbufaddr + i * PAGE_SIZE, 186 avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 0); 187 pmap_update(pmap_kernel()); 188 initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE)); 189 190 191 pio0[3] = 0xb6; 192 pio0[2] = 1 << 6; /* enable parity check */ 193 pio0[3] = 0xb6; 194 sw1 = pio0[0]; /* dip sw1 value */ 195 sw1 ^= 0xff; 196 sysconsole = !(sw1 & 0x2); /* console selection */ 197 198 /* 199 * Check if boothowto and bootdev values are passed by our bootloader. 200 */ 201 if ((bootdev & B_MAGICMASK) == B_DEVMAGIC) { 202 /* Valid value is set; no need to parse bootarg. */ 203 return; 204 } 205 206 /* 207 * No valid bootdev value is set. 208 * Assume we are booted by ROM monitor directly using a.out kernel 209 * and we have to parse bootarg passed from the monitor to set 210 * proper boothowto and check netboot. 211 */ 212 213 /* set default to "sd0a" with no howto flags */ 214 bootdev = MAKEBOOTDEV(0, LUNA68K_BOOTADPT_SPC, 0, 0, 0); 215 boothowto = 0; 216 217 /* 218 * 'bootarg' on LUNA has: 219 * "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>" 220 * where <addr> is MAC address of which network loader used (not 221 * necessarily same as one at 0x4101.FFE0), <host> and <name> 222 * are the values of HOST and SERVER environment variables. 223 * 224 * 'bootarg' on LUNA-II has "<args of x command>" only. 225 * 226 * NetBSD/luna68k cares only the first argment; any of "sda". 227 */ 228 bootarg[63] = '\0'; 229 for (cp = bootarg; *cp != '\0'; cp++) { 230 if (*cp == '-') { 231 char c; 232 while ((c = *cp) != '\0' && c != ' ') { 233 BOOT_FLAG(c, boothowto); 234 cp++; 235 } 236 } else if (*cp == 'E' && memcmp("ENADDR=", cp, 7) == 0) { 237 bootdev = 238 MAKEBOOTDEV(0, LUNA68K_BOOTADPT_LANCE, 0, 0, 0); 239 } 240 } 241 } 242 243 /* 244 * Console initialization: called early on from main, 245 */ 246 void 247 consinit(void) 248 { 249 250 if (sysconsole == 0) { 251 cn_tab = &siottycons; 252 (*cn_tab->cn_init)(cn_tab); 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 = uimax(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]; 322 323 if (fputype != FPU_NONE) 324 m68k_make_fpu_idle_frame(); 325 326 /* 327 * Initialize the kernel crash dump header. 328 */ 329 cpu_init_kcore_hdr(); 330 331 /* 332 * Good {morning,afternoon,evening,night}. 333 */ 334 printf("%s%s", copyright, version); 335 identifycpu(); 336 337 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 338 printf("total memory = %s\n", pbuf); 339 340 minaddr = 0; 341 342 /* 343 * Allocate a submap for physio 344 */ 345 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 346 VM_PHYS_SIZE, 0, false, NULL); 347 348 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false))); 349 printf("avail memory = %s\n", pbuf); 350 } 351 352 void 353 identifycpu(void) 354 { 355 extern int cputype; 356 const char *model, *fpu; 357 358 switch (cputype) { 359 case CPU_68030: 360 model ="LUNA-I"; 361 switch (fputype) { 362 case FPU_68881: 363 fpu = "MC68881"; 364 break; 365 case FPU_68882: 366 fpu = "MC68882"; 367 break; 368 case FPU_NONE: 369 fpu = "no"; 370 break; 371 default: 372 fpu = "unknown"; 373 break; 374 } 375 cpu_setmodel("%s (MC68030 CPU+MMU, %s FPU)", model, fpu); 376 machtype = LUNA_I; 377 /* 20MHz 68030 */ 378 cpuspeed = 20; 379 delay_divisor = 102; 380 hz = 60; 381 break; 382 #if defined(M68040) 383 case CPU_68040: 384 model ="LUNA-II"; 385 cpu_setmodel( 386 "%s (MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches)", 387 model); 388 machtype = LUNA_II; 389 /* 25MHz 68040 */ 390 cpuspeed = 25; 391 delay_divisor = 30; 392 /* hz = 100 on LUNA-II */ 393 break; 394 #endif 395 default: 396 panic("unknown CPU type"); 397 } 398 printf("%s\n", cpu_getmodel()); 399 } 400 401 /* 402 * machine dependent system variables. 403 */ 404 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 405 { 406 407 sysctl_createv(clog, 0, NULL, NULL, 408 CTLFLAG_PERMANENT, 409 CTLTYPE_NODE, "machdep", NULL, 410 NULL, 0, NULL, 0, 411 CTL_MACHDEP, CTL_EOL); 412 413 sysctl_createv(clog, 0, NULL, NULL, 414 CTLFLAG_PERMANENT, 415 CTLTYPE_STRUCT, "console_device", NULL, 416 sysctl_consdev, 0, NULL, sizeof(dev_t), 417 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 418 } 419 420 int waittime = -1; 421 422 void 423 cpu_reboot(int howto, char *bootstr) 424 { 425 struct pcb *pcb = lwp_getpcb(curlwp); 426 extern void doboot(void); 427 428 /* take a snap shot before clobbering any registers */ 429 if (pcb != NULL) 430 savectx(pcb); 431 432 /* If system is hold, just halt. */ 433 if (cold) { 434 howto |= RB_HALT; 435 goto haltsys; 436 } 437 438 boothowto = howto; 439 if ((howto & RB_NOSYNC) == 0 && waittime < 0) { 440 waittime = 0; 441 vfs_shutdown(); 442 /* 443 * If we've been adjusting the clock, the todr 444 * will be out of synch; adjust it now. 445 */ 446 resettodr(); 447 } 448 449 /* Disable interrupts. */ 450 splhigh(); 451 452 /* If rebooting and a dump is requested, do it. */ 453 if (howto & RB_DUMP) 454 dumpsys(); 455 456 haltsys: 457 /* Run any shutdown hooks. */ 458 doshutdownhooks(); 459 460 pmf_system_shutdown(boothowto); 461 462 /* Finally, halt/reboot the system. */ 463 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 464 volatile uint8_t *pio = (void *)OBIO_PIO1_BASE; 465 466 printf("power is going down.\n"); 467 DELAY(100000); 468 pio[3] = 0x94; 469 pio[2] = 0 << 4; 470 for (;;) 471 /* NOP */; 472 } 473 if (howto & RB_HALT) { 474 printf("System halted. Hit any key to reboot.\n\n"); 475 (void)cngetc(); 476 } 477 478 printf("rebooting...\n"); 479 DELAY(100000); 480 doboot(); 481 /*NOTREACHED*/ 482 for (;;) 483 ; 484 } 485 486 /* 487 * Initialize the kernel crash dump header. 488 */ 489 void 490 cpu_init_kcore_hdr(void) 491 { 492 cpu_kcore_hdr_t *h = &cpu_kcore_hdr; 493 struct m68k_kcore_hdr *m = &h->un._m68k; 494 495 memset(&cpu_kcore_hdr, 0, sizeof(cpu_kcore_hdr)); 496 497 /* 498 * Initialize the `dispatcher' portion of the header. 499 */ 500 strcpy(h->name, machine); 501 h->page_size = PAGE_SIZE; 502 h->kernbase = KERNBASE; 503 504 /* 505 * Fill in information about our MMU configuration. 506 */ 507 m->mmutype = mmutype; 508 m->sg_v = SG_V; 509 m->sg_frame = SG_FRAME; 510 m->sg_ishift = SG_ISHIFT; 511 m->sg_pmask = SG_PMASK; 512 m->sg40_shift1 = SG4_SHIFT1; 513 m->sg40_mask2 = SG4_MASK2; 514 m->sg40_shift2 = SG4_SHIFT2; 515 m->sg40_mask3 = SG4_MASK3; 516 m->sg40_shift3 = SG4_SHIFT3; 517 m->sg40_addr1 = SG4_ADDR1; 518 m->sg40_addr2 = SG4_ADDR2; 519 m->pg_v = PG_V; 520 m->pg_frame = PG_FRAME; 521 522 /* 523 * Initialize pointer to kernel segment table. 524 */ 525 m->sysseg_pa = (uint32_t)(pmap_kernel()->pm_stpa); 526 527 /* 528 * Initialize relocation value such that: 529 * 530 * pa = (va - KERNBASE) + reloc 531 * 532 * Since we're linked and loaded at the same place, 533 * and the kernel is mapped va == pa, this is 0. 534 */ 535 m->reloc = 0; 536 537 /* 538 * Define the end of the relocatable range. 539 */ 540 m->relocend = (uint32_t)end; 541 542 /* 543 * The luna68k has one contiguous memory segment. 544 */ 545 m->ram_segs[0].start = 0 /* lowram */; 546 m->ram_segs[0].size = ctob(physmem); 547 } 548 549 /* 550 * Compute the size of the machine-dependent crash dump header. 551 * Returns size in disk blocks. 552 */ 553 554 #define CHDRSIZE (ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t))) 555 #define MDHDRSIZE roundup(CHDRSIZE, dbtob(1)) 556 557 int 558 cpu_dumpsize(void) 559 { 560 561 return btodb(MDHDRSIZE); 562 } 563 564 /* 565 * Called by dumpsys() to dump the machine-dependent header. 566 */ 567 int 568 cpu_dump(int (*dump)(dev_t, daddr_t, void *, size_t), daddr_t *blknop) 569 { 570 int buf[MDHDRSIZE / sizeof(int)]; 571 cpu_kcore_hdr_t *chdr; 572 kcore_seg_t *kseg; 573 int error; 574 575 kseg = (kcore_seg_t *)buf; 576 chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) / 577 sizeof(int)]; 578 579 /* Create the segment header. */ 580 CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 581 kseg->c_size = MDHDRSIZE - ALIGN(sizeof(kcore_seg_t)); 582 583 memcpy(chdr, &cpu_kcore_hdr, sizeof(cpu_kcore_hdr_t)); 584 error = (*dump)(dumpdev, *blknop, (void *)buf, sizeof(buf)); 585 *blknop += btodb(sizeof(buf)); 586 return error; 587 } 588 589 /* 590 * These variables are needed by /sbin/savecore 591 */ 592 uint32_t dumpmag = 0x8fca0101; /* magic number */ 593 int dumpsize = 0; /* pages */ 594 long dumplo = 0; /* blocks */ 595 596 /* 597 * This is called by main to set dumplo and dumpsize. 598 * Dumps always skip the first PAGE_SIZE of disk space 599 * in case there might be a disk label stored there. 600 * If there is extra space, put dump at the end to 601 * reduce the chance that swapping trashes it. 602 */ 603 void 604 cpu_dumpconf(void) 605 { 606 int chdrsize; /* size of dump header */ 607 int nblks; /* size of dump area */ 608 609 if (dumpdev == NODEV) 610 return; 611 nblks = bdev_size(dumpdev); 612 chdrsize = cpu_dumpsize(); 613 614 dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size); 615 616 /* 617 * Check do see if we will fit. Note we always skip the 618 * first PAGE_SIZE in case there is a disk label there. 619 */ 620 if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) { 621 dumpsize = 0; 622 dumplo = -1; 623 return; 624 } 625 626 /* 627 * Put dump at the end of the partition. 628 */ 629 dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize; 630 } 631 632 /* 633 * Dump physical memory onto the dump device. Called by cpu_reboot(). 634 */ 635 void 636 dumpsys(void) 637 { 638 const struct bdevsw *bdev; 639 daddr_t blkno; /* current block to write */ 640 /* dump routine */ 641 int (*dump)(dev_t, daddr_t, void *, size_t); 642 int pg; /* page being dumped */ 643 paddr_t maddr; /* PA being dumped */ 644 int error; /* error code from (*dump)() */ 645 646 /* XXX initialized here because of gcc lossage */ 647 maddr = 0 /* lowram */; 648 pg = 0; 649 650 /* Make sure dump device is valid. */ 651 if (dumpdev == NODEV) 652 return; 653 bdev = bdevsw_lookup(dumpdev); 654 if (bdev == NULL) 655 return; 656 if (dumpsize == 0) { 657 cpu_dumpconf(); 658 if (dumpsize == 0) 659 return; 660 } 661 if (dumplo <= 0) { 662 printf("\ndump to dev %u,%u not possible\n", 663 major(dumpdev), minor(dumpdev)); 664 return; 665 } 666 dump = bdev->d_dump; 667 blkno = dumplo; 668 669 printf("\ndumping to dev %u,%u offset %ld\n", 670 major(dumpdev), minor(dumpdev), dumplo); 671 672 printf("dump "); 673 674 /* Write the dump header. */ 675 error = cpu_dump(dump, &blkno); 676 if (error) 677 goto bad; 678 679 for (pg = 0; pg < dumpsize; pg++) { 680 #define NPGMB (1024*1024/PAGE_SIZE) 681 /* print out how many MBs we have dumped */ 682 if (pg && (pg % NPGMB) == 0) 683 printf("%d ", pg / NPGMB); 684 #undef NPGMB 685 pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr, 686 VM_PROT_READ, VM_PROT_READ|PMAP_WIRED); 687 688 pmap_update(pmap_kernel()); 689 error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE); 690 bad: 691 switch (error) { 692 case 0: 693 maddr += PAGE_SIZE; 694 blkno += btodb(PAGE_SIZE); 695 break; 696 697 case ENXIO: 698 printf("device bad\n"); 699 return; 700 701 case EFAULT: 702 printf("device not ready\n"); 703 return; 704 705 case EINVAL: 706 printf("area improper\n"); 707 return; 708 709 case EIO: 710 printf("i/o error\n"); 711 return; 712 713 case EINTR: 714 printf("aborted from console\n"); 715 return; 716 717 default: 718 printf("error %d\n", error); 719 return; 720 } 721 } 722 printf("succeeded\n"); 723 } 724 725 void 726 straytrap(int pc, u_short evec) 727 { 728 729 printf("unexpected trap (vector offset %x) from %x\n", 730 evec & 0xFFF, pc); 731 } 732 733 int *nofault; 734 735 int 736 badaddr(register void *addr, int nbytes) 737 { 738 int i; 739 label_t faultbuf; 740 741 nofault = (int *)&faultbuf; 742 if (setjmp((label_t *)nofault)) { 743 nofault = (int *)0; 744 return 1; 745 } 746 747 switch (nbytes) { 748 case 1: 749 i = *(volatile int8_t *)addr; 750 break; 751 752 case 2: 753 i = *(volatile int16_t *)addr; 754 break; 755 756 case 4: 757 i = *(volatile int32_t *)addr; 758 break; 759 760 default: 761 panic("badaddr: bad request"); 762 } 763 __USE(i); 764 nofault = (int *)0; 765 return 0; 766 } 767 768 void luna68k_abort(const char *); 769 770 static int innmihand; /* simple mutex */ 771 772 /* 773 * Level 7 interrupts are caused by e.g. the ABORT switch. 774 * 775 * If we have DDB, then break into DDB on ABORT. In a production 776 * environment, bumping the ABORT switch would be bad, so we enable 777 * panic'ing on ABORT with the kernel option "PANICBUTTON". 778 */ 779 void 780 nmihand(struct frame frame) 781 { 782 783 /* Prevent unwanted recursion */ 784 if (innmihand) 785 return; 786 innmihand = 1; 787 788 luna68k_abort("ABORT SWITCH"); 789 790 innmihand = 0; 791 } 792 793 /* 794 * Common code for handling ABORT signals from buttons, switches, 795 * serial lines, etc. 796 */ 797 void 798 luna68k_abort(const char *cp) 799 { 800 801 #ifdef DDB 802 printf("%s\n", cp); 803 cpu_Debugger(); 804 #else 805 #ifdef PANICBUTTON 806 panic(cp); 807 #else 808 printf("%s ignored\n", cp); 809 #endif /* PANICBUTTON */ 810 #endif /* DDB */ 811 } 812 813 /* 814 * cpu_exec_aout_makecmds(): 815 * CPU-dependent a.out format hook for execve(). 816 * 817 * Determine of the given exec package refers to something which we 818 * understand and, if so, set up the vmcmds for it. 819 */ 820 int 821 cpu_exec_aout_makecmds(struct lwp *l, struct exec_package *epp) 822 { 823 int error = ENOEXEC; 824 #ifdef COMPAT_SUNOS 825 extern sunos_exec_aout_makecmds(struct proc *, struct exec_package *); 826 827 if ((error = sunos_exec_aout_makecmds(l->l_proc, epp)) == 0) 828 return 0; 829 #endif 830 return error; 831 } 832 833 #ifdef MODULAR 834 /* 835 * Push any modules loaded by the bootloader etc. 836 */ 837 void 838 module_init_md(void) 839 { 840 } 841 #endif 842 843 #ifdef notyet 844 /* 845 * romcons is useful until m68k TC register is initialized. 846 */ 847 int romcngetc(dev_t); 848 void romcnputc(dev_t, int); 849 850 struct consdev romcons = { 851 NULL, 852 NULL, 853 romcngetc, 854 romcnputc, 855 nullcnpollc, 856 makedev(7, 0), /* XXX */ 857 CN_DEAD, 858 }; 859 860 #define __ ((int **)PROM_ADDR) 861 #define GETC() (*(int (*)())__[6])() 862 #define PUTC(x) (*(void (*)())__[7])(x) 863 864 #define ROMPUTC(x) \ 865 ({ \ 866 register _r; \ 867 __asm volatile (" \ 868 movc %%vbr,%0 ; \ 869 movel %0,%%sp@- ; \ 870 clrl %0 ; \ 871 movc %0,%%vbr" \ 872 : "=r" (_r)); \ 873 PUTC(x); \ 874 __asm volatile (" \ 875 movel %%sp@+,%0 ; \ 876 movc %0,%%vbr" \ 877 : "=r" (_r)); \ 878 }) 879 880 #define ROMGETC() \ 881 ({ \ 882 register _r, _c; \ 883 __asm volatile (" \ 884 movc %%vbr,%0 ; \ 885 movel %0,%%sp@- ; \ 886 clrl %0 ; \ 887 movc %0,%%vbr" \ 888 : "=r" (_r)); \ 889 _c = GETC(); \ 890 __asm volatile (" \ 891 movel %%sp@+,%0 ; \ 892 movc %0,%%vbr" \ 893 : "=r" (_r)); \ 894 _c; \ 895 }) 896 897 void 898 romcnputc(dev_t dev, int c) 899 { 900 int s; 901 902 s = splhigh(); 903 ROMPUTC(c); 904 splx(s); 905 } 906 907 int 908 romcngetc(dev_t dev) 909 { 910 int s, c; 911 912 do { 913 s = splhigh(); 914 c = ROMGETC(); 915 splx(s); 916 } while (c == -1); 917 return c; 918 } 919 #endif 920 921 int 922 mm_md_physacc(paddr_t pa, vm_prot_t prot) 923 { 924 925 return (pa < lowram || pa >= 0xfffffffc) ? EFAULT : 0; 926 } 927
Indexes created Mon Sep 29 03:10:08 GMT 2025