machdep.c revision 1.22
1 /* $NetBSD: machdep.c,v 1.22 2002/08/25 20:21:38 thorpej 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 1.22 2002/08/25 20:21:38 thorpej Exp $"); 42 43 #include "opt_ddb.h" 44 #include "opt_kgdb.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/map.h> 50 #include <sys/proc.h> 51 #include <sys/buf.h> 52 #include <sys/reboot.h> 53 #include <sys/conf.h> 54 #include <sys/file.h> 55 #include <sys/clist.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/syscallargs.h> 69 #ifdef KGDB 70 #include <sys/kgdb.h> 71 #endif 72 #include <sys/boot_flag.h> 73 74 #include <uvm/uvm_extern.h> 75 76 #include <sys/sysctl.h> 77 78 #include <machine/cpu.h> 79 #include <machine/reg.h> 80 #include <machine/psl.h> 81 #include <machine/pte.h> 82 #include <machine/kcore.h> /* XXX should be pulled in by sys/kcore.h */ 83 84 #include <dev/cons.h> 85 86 #if defined(DDB) 87 #include <machine/db_machdep.h> 88 #include <ddb/db_sym.h> 89 #include <ddb/db_extern.h> 90 #endif 91 92 /* 93 * Info for CTL_HW 94 */ 95 char machine[] = MACHINE; 96 char cpu_model[60]; 97 98 /* Our exported CPU info; we can have only one. */ 99 struct cpu_info cpu_info_store; 100 101 extern char kernel_text[]; 102 extern char etext[]; 103 104 struct vm_map *exec_map = NULL; 105 struct vm_map *mb_map = NULL; 106 struct vm_map *phys_map = NULL; 107 108 caddr_t msgbufaddr; 109 int maxmem; /* max memory per process */ 110 int physmem; /* set by locore */ 111 /* 112 * safepri is a safe priority for sleep to set for a spin-wait 113 * during autoconfiguration or after a panic. 114 */ 115 int safepri = PSL_LOWIPL; 116 117 void luna68k_init __P((void)); 118 void identifycpu __P((void)); 119 void dumpsys __P((void)); 120 121 void straytrap __P((int, u_short)); 122 void nmihand __P((struct frame)); 123 124 int cpu_dumpsize __P((void)); 125 int cpu_dump __P((int (*)(dev_t, daddr_t, caddr_t, size_t), daddr_t *)); 126 void cpu_init_kcore_hdr __P((void)); 127 128 /* 129 * Machine-independent crash dump header info. 130 */ 131 cpu_kcore_hdr_t cpu_kcore_hdr; 132 133 int machtype; /* model: 1 for LUNA-1, 2 for LUNA-2 */ 134 int sysconsole; /* console: 0 for ttya, 1 for video */ 135 136 extern struct consdev syscons; 137 extern void omfb_cnattach __P((void)); 138 extern void ws_cnattach __P((void)); 139 extern void syscnattach __P((int)); 140 141 /* 142 * On the 68020/68030, the value of delay_divisor is roughly 143 * 2048 / cpuspeed (where cpuspeed is in MHz). 144 * 145 * On the 68040/68060(?), the value of delay_divisor is roughly 146 * 759 / cpuspeed (where cpuspeed is in MHz). 147 * XXX -- is the above formula correct? 148 */ 149 int cpuspeed = 25; /* only used for printing later */ 150 int delay_divisor = 300; /* for delay() loop count */ 151 152 /* 153 * Early initialization, before main() is called. 154 */ 155 void 156 luna68k_init() 157 { 158 volatile unsigned char *pio0 = (void *)0x49000000; 159 int sw1, i; 160 char *cp; 161 extern char bootarg[64]; 162 163 extern paddr_t avail_start, avail_end; 164 165 /* 166 * Tell the VM system about available physical memory. The 167 * luna68k only has one segment. 168 */ 169 uvm_page_physload(atop(avail_start), atop(avail_end), 170 atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT); 171 172 /* 173 * Initialize error message buffer (at end of core). 174 * avail_end was pre-decremented in pmap_bootstrap to compensate. 175 */ 176 for (i = 0; i < btoc(MSGBUFSIZE); i++) 177 pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * NBPG, 178 avail_end + i * NBPG, VM_PROT_READ|VM_PROT_WRITE, 179 VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED); 180 pmap_update(pmap_kernel()); 181 initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE)); 182 183 184 pio0[3] = 0xb6; 185 pio0[2] = 1 << 6; /* enable parity check */ 186 pio0[3] = 0xb6; 187 sw1 = pio0[0]; /* dipssw1 value */ 188 sw1 ^= 0xff; 189 sysconsole = !(sw1 & 0x2); /* console selection */ 190 191 boothowto = 0; 192 i = 0; 193 /* 194 * 'bootarg' has; 195 * "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>" 196 * where <addr> is MAC address of which network loader used (not 197 * necessarily same as one at 0x4101.FFE0), <host> and <name> 198 * are the values of HOST and SERVER environment variables, 199 * 200 * NetBSD/luna68k cares only the first argment; any of "sda". 201 */ 202 for (cp = bootarg; *cp != ' '; cp++) { 203 BOOT_FLAG(*cp, boothowto); 204 if (i++ >= sizeof(bootarg)) 205 break; 206 } 207 #if 0 /* overload 1:sw1, which now means 'go ROM monitor' after poweron */ 208 if (boothowto == 0) 209 boothowto = (sw1 & 0x1) ? RB_SINGLE : 0; 210 #endif 211 } 212 213 /* 214 * Console initialization: called early on from main, 215 */ 216 void 217 consinit() 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 caddr_t v; 245 u_int i, base, residual; 246 vaddr_t minaddr, maxaddr; 247 vsize_t size; 248 char pbuf[9]; 249 extern void greeting __P((void)); 250 251 /* 252 * Initialize the kernel crash dump header. 253 */ 254 cpu_init_kcore_hdr(); 255 256 /* 257 * Good {morning,afternoon,evening,night}. 258 */ 259 printf(version); 260 identifycpu(); 261 262 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 263 printf("total memory = %s\n", pbuf); 264 265 /* 266 * Find out how much space we need, allocate it, 267 * and then give everything true virtual addresses. 268 */ 269 size = (int)allocsys(NULL, NULL); 270 if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(size))) == 0) 271 panic("startup: no room for tables"); 272 if (allocsys(v, NULL) - v != size) 273 panic("startup: table size inconsistency"); 274 275 /* 276 * Now allocate buffers proper. They are different than the above 277 * in that they usually occupy more virtual memory than physical. 278 */ 279 size = MAXBSIZE * nbuf; 280 if (uvm_map(kernel_map, (vaddr_t *) &buffers, round_page(size), 281 NULL, UVM_UNKNOWN_OFFSET, 0, 282 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 283 UVM_ADV_NORMAL, 0)) != 0) 284 panic("startup: cannot allocate VM for buffers"); 285 minaddr = (vaddr_t)buffers; 286 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 287 /* don't want to alloc more physical mem than needed */ 288 bufpages = btoc(MAXBSIZE) * nbuf; 289 } 290 base = bufpages / nbuf; 291 residual = bufpages % nbuf; 292 for (i = 0; i < nbuf; i++) { 293 vsize_t curbufsize; 294 vaddr_t curbuf; 295 struct vm_page *pg; 296 297 /* 298 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 299 * that MAXBSIZE space, we allocate and map (base+1) pages 300 * for the first "residual" buffers, and then we allocate 301 * "base" pages for the rest. 302 */ 303 curbuf = (vsize_t) buffers + (i * MAXBSIZE); 304 curbufsize = NBPG * ((i < residual) ? (base+1) : base); 305 306 while (curbufsize) { 307 pg = uvm_pagealloc(NULL, 0, NULL, 0); 308 if (pg == NULL) 309 panic("cpu_startup: not enough memory for " 310 "buffer cache"); 311 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 312 VM_PROT_READ|VM_PROT_WRITE); 313 curbuf += PAGE_SIZE; 314 curbufsize -= PAGE_SIZE; 315 } 316 } 317 pmap_update(pmap_kernel()); 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 %u 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) != 0) 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 != 0) 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)p->p_psstr; 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 #if defined(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_int32_t 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 pmap_update(pmap_kernel()); 742 error = (*dump)(dumpdev, blkno, vmmap, NBPG); 743 bad: 744 switch (error) { 745 case 0: 746 maddr += NBPG; 747 blkno += btodb(NBPG); 748 break; 749 750 case ENXIO: 751 printf("device bad\n"); 752 return; 753 754 case EFAULT: 755 printf("device not ready\n"); 756 return; 757 758 case EINVAL: 759 printf("area improper\n"); 760 return; 761 762 case EIO: 763 printf("i/o error\n"); 764 return; 765 766 case EINTR: 767 printf("aborted from console\n"); 768 return; 769 770 default: 771 printf("error %d\n", error); 772 return; 773 } 774 } 775 printf("succeeded\n"); 776 } 777 778 void 779 straytrap(pc, evec) 780 int pc; 781 u_short evec; 782 { 783 printf("unexpected trap (vector offset %x) from %x\n", 784 evec & 0xFFF, pc); 785 } 786 787 int *nofault; 788 789 int 790 badaddr(addr, nbytes) 791 register caddr_t addr; 792 int nbytes; 793 { 794 register int i; 795 label_t faultbuf; 796 797 #ifdef lint 798 i = *addr; if (i) return (0); 799 #endif 800 801 nofault = (int *) &faultbuf; 802 if (setjmp((label_t *)nofault)) { 803 nofault = (int *) 0; 804 return(1); 805 } 806 807 switch (nbytes) { 808 case 1: 809 i = *(volatile char *)addr; 810 break; 811 812 case 2: 813 i = *(volatile short *)addr; 814 break; 815 816 case 4: 817 i = *(volatile int *)addr; 818 break; 819 820 default: 821 panic("badaddr: bad request"); 822 } 823 nofault = (int *) 0; 824 return (0); 825 } 826 827 void luna68k_abort __P((char *)); 828 829 static int innmihand; /* simple mutex */ 830 831 /* 832 * Level 7 interrupts are caused by e.g. the ABORT switch. 833 * 834 * If we have DDB, then break into DDB on ABORT. In a production 835 * environment, bumping the ABORT switch would be bad, so we enable 836 * panic'ing on ABORT with the kernel option "PANICBUTTON". 837 */ 838 void 839 nmihand(frame) 840 struct frame frame; 841 { 842 /* Prevent unwanted recursion */ 843 if (innmihand) 844 return; 845 innmihand = 1; 846 847 luna68k_abort("ABORT SWITCH"); 848 } 849 850 /* 851 * Common code for handling ABORT signals from buttons, switches, 852 * serial lines, etc. 853 */ 854 void 855 luna68k_abort(cp) 856 char *cp; 857 { 858 #ifdef DDB 859 printf("%s\n", cp); 860 cpu_Debugger(); 861 #else 862 #ifdef PANICBUTTON 863 panic(cp); 864 #else 865 printf("%s ignored\n", cp); 866 #endif /* PANICBUTTON */ 867 #endif /* DDB */ 868 } 869 870 /* 871 * cpu_exec_aout_makecmds(): 872 * cpu-dependent a.out format hook for execve(). 873 * 874 * Determine of the given exec package refers to something which we 875 * understand and, if so, set up the vmcmds for it. 876 */ 877 int 878 cpu_exec_aout_makecmds(p, epp) 879 struct proc *p; 880 struct exec_package *epp; 881 { 882 int error = ENOEXEC; 883 #ifdef COMPAT_SUNOS 884 extern sunos_exec_aout_makecmds 885 __P((struct proc *, struct exec_package *)); 886 if ((error = sunos_exec_aout_makecmds(p, epp)) == 0) 887 return 0; 888 #endif 889 return error; 890 } 891 892 /* 893 * Return the best possible estimate of the time in the timeval 894 * to which tvp points. Unfortunately, we can't read the hardware registers. 895 * We guarantee that the time will be greater than the value obtained by a 896 * previous call. 897 */ 898 void 899 microtime(tvp) 900 register struct timeval *tvp; 901 { 902 int s = splclock(); 903 static struct timeval lasttime; 904 905 *tvp = time; 906 #ifdef notdef 907 tvp->tv_usec += clkread(); 908 while (tvp->tv_usec >= 1000000) { 909 tvp->tv_sec++; 910 tvp->tv_usec -= 1000000; 911 } 912 #endif 913 if (tvp->tv_sec == lasttime.tv_sec && 914 tvp->tv_usec <= lasttime.tv_usec && 915 (tvp->tv_usec = lasttime.tv_usec + 1) >= 1000000) { 916 tvp->tv_sec++; 917 tvp->tv_usec -= 1000000; 918 } 919 lasttime = *tvp; 920 splx(s); 921 } 922 923 #if 1 924 925 struct consdev *cn_tab = &syscons; 926 927 #else 928 929 /* 930 * romcons is useful until m68k TC register is initialized. 931 */ 932 int romcngetc __P((dev_t)); 933 void romcnputc __P((dev_t, int)); 934 935 struct consdev romcons = { 936 NULL, 937 NULL, 938 romcngetc, 939 romcnputc, 940 nullcnpollc, 941 makedev(7, 0), /* XXX */ 942 CN_DEAD, 943 }; 944 struct consdev *cn_tab = &romcons; 945 946 #define __ ((int **)0x41000000) 947 #define GETC() (*(int (*)())__[6])() 948 #define PUTC(x) (*(void (*)())__[7])(x) 949 950 #define ROMPUTC(x) \ 951 ({ \ 952 register _r; \ 953 asm volatile (" \ 954 movc %%vbr,%0 ; \ 955 movel %0,%%sp@- ; \ 956 clrl %0 ; \ 957 movc %0,%%vbr" \ 958 : "=r" (_r)); \ 959 PUTC(x); \ 960 asm volatile (" \ 961 movel %%sp@+,%0 ; \ 962 movc %0,%%vbr" \ 963 : "=r" (_r)); \ 964 }) 965 966 #define ROMGETC() \ 967 ({ \ 968 register _r, _c; \ 969 asm volatile (" \ 970 movc %%vbr,%0 ; \ 971 movel %0,%%sp@- ; \ 972 clrl %0 ; \ 973 movc %0,%%vbr" \ 974 : "=r" (_r)); \ 975 _c = GETC(); \ 976 asm volatile (" \ 977 movel %%sp@+,%0 ; \ 978 movc %0,%%vbr" \ 979 : "=r" (_r)); \ 980 _c; \ 981 }) 982 983 void 984 romcnputc(dev, c) 985 dev_t dev; 986 int c; 987 { 988 int s; 989 990 s = splhigh(); 991 ROMPUTC(c); 992 splx(s); 993 } 994 995 int 996 romcngetc(dev) 997 dev_t dev; 998 { 999 int s, c; 1000 1001 do { 1002 s = splhigh(); 1003 c = ROMGETC(); 1004 splx(s); 1005 } while (c == -1); 1006 return c; 1007 } 1008 #endif 1009
Indexes created Tue Sep 30 11:09:46 GMT 2025