machdep.c revision 1.21
1 /* $NetBSD: machdep.c,v 1.21 2002/03/20 17:59:23 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 * 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 1.21 2002/03/20 17:59:23 christos 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 int i; 245 caddr_t v; 246 int base, residual; 247 vaddr_t minaddr, maxaddr; 248 vsize_t size; 249 char pbuf[9]; 250 extern void greeting __P((void)); 251 252 /* 253 * Initialize the kernel crash dump header. 254 */ 255 cpu_init_kcore_hdr(); 256 257 /* 258 * Good {morning,afternoon,evening,night}. 259 */ 260 printf(version); 261 identifycpu(); 262 263 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 264 printf("total memory = %s\n", pbuf); 265 266 /* 267 * Find out how much space we need, allocate it, 268 * and then give everything true virtual addresses. 269 */ 270 size = (int)allocsys(NULL, NULL); 271 if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(size))) == 0) 272 panic("startup: no room for tables"); 273 if (allocsys(v, NULL) - v != size) 274 panic("startup: table size inconsistency"); 275 276 /* 277 * Now allocate buffers proper. They are different than the above 278 * in that they usually occupy more virtual memory than physical. 279 */ 280 size = MAXBSIZE * nbuf; 281 if (uvm_map(kernel_map, (vaddr_t *) &buffers, round_page(size), 282 NULL, UVM_UNKNOWN_OFFSET, 0, 283 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 284 UVM_ADV_NORMAL, 0)) != 0) 285 panic("startup: cannot allocate VM for buffers"); 286 minaddr = (vaddr_t)buffers; 287 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 288 /* don't want to alloc more physical mem than needed */ 289 bufpages = btoc(MAXBSIZE) * nbuf; 290 } 291 base = bufpages / nbuf; 292 residual = bufpages % nbuf; 293 for (i = 0; i < nbuf; i++) { 294 vsize_t curbufsize; 295 vaddr_t curbuf; 296 struct vm_page *pg; 297 298 /* 299 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 300 * that MAXBSIZE space, we allocate and map (base+1) pages 301 * for the first "residual" buffers, and then we allocate 302 * "base" pages for the rest. 303 */ 304 curbuf = (vsize_t) buffers + (i * MAXBSIZE); 305 curbufsize = NBPG * ((i < residual) ? (base+1) : base); 306 307 while (curbufsize) { 308 pg = uvm_pagealloc(NULL, 0, NULL, 0); 309 if (pg == NULL) 310 panic("cpu_startup: not enough memory for " 311 "buffer cache"); 312 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 313 VM_PROT_READ|VM_PROT_WRITE); 314 curbuf += PAGE_SIZE; 315 curbufsize -= PAGE_SIZE; 316 } 317 } 318 pmap_update(pmap_kernel()); 319 320 /* 321 * Allocate a submap for exec arguments. This map effectively 322 * limits the number of processes exec'ing at any time. 323 */ 324 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 325 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 326 327 /* 328 * Allocate a submap for physio 329 */ 330 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 331 VM_PHYS_SIZE, 0, FALSE, NULL); 332 333 /* 334 * Finally, allocate mbuf cluster submap. 335 */ 336 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 337 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 338 FALSE, NULL); 339 340 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 341 printf("avail memory = %s\n", pbuf); 342 format_bytes(pbuf, sizeof(pbuf), bufpages * NBPG); 343 printf("using %d buffers containing %s of memory\n", nbuf, pbuf); 344 345 /* 346 * Tell the VM system that the area before the text segment 347 * is invalid. 348 * 349 * XXX Should just change KERNBASE and VM_MIN_KERNEL_ADDRESS, 350 * XXX but not right now. 351 */ 352 if (uvm_map_protect(kernel_map, 0, round_page((vaddr_t)&kernel_text), 353 UVM_PROT_NONE, TRUE) != 0) 354 panic("can't mark pre-text pages off-limits"); 355 356 /* 357 * Tell the VM system that writing to kernel text isn't allowed. 358 * If we don't, we might end up COW'ing the text segment! 359 */ 360 if (uvm_map_protect(kernel_map, trunc_page((vaddr_t)&kernel_text), 361 trunc_page((vaddr_t)&etext), UVM_PROT_READ|UVM_PROT_EXEC, TRUE) 362 != 0) 363 panic("can't protect kernel text"); 364 365 /* 366 * Set up buffers, so they can be used to read disk labels. 367 */ 368 bufinit(); 369 370 /* 371 * Say "Hi" to the world 372 */ 373 greeting(); 374 } 375 376 /* 377 * Set registers on exec. 378 */ 379 void 380 setregs(p, pack, stack) 381 register struct proc *p; 382 struct exec_package *pack; 383 u_long stack; 384 { 385 struct frame *frame = (struct frame *)p->p_md.md_regs; 386 extern int fputype; 387 388 frame->f_sr = PSL_USERSET; 389 frame->f_pc = pack->ep_entry & ~1; 390 frame->f_regs[D0] = 0; 391 frame->f_regs[D1] = 0; 392 frame->f_regs[D2] = 0; 393 frame->f_regs[D3] = 0; 394 frame->f_regs[D4] = 0; 395 frame->f_regs[D5] = 0; 396 frame->f_regs[D6] = 0; 397 frame->f_regs[D7] = 0; 398 frame->f_regs[A0] = 0; 399 frame->f_regs[A1] = 0; 400 frame->f_regs[A2] = (int)p->p_psstr; 401 frame->f_regs[A3] = 0; 402 frame->f_regs[A4] = 0; 403 frame->f_regs[A5] = 0; 404 frame->f_regs[A6] = 0; 405 frame->f_regs[SP] = stack; 406 407 /* restore a null state frame */ 408 p->p_addr->u_pcb.pcb_fpregs.fpf_null = 0; 409 if (fputype) 410 m68881_restore(&p->p_addr->u_pcb.pcb_fpregs); 411 } 412 413 void 414 identifycpu() 415 { 416 extern int cputype; 417 char *cpu; 418 419 bzero(cpu_model, sizeof(cpu_model)); 420 switch (cputype) { 421 case CPU_68030: 422 cpu = "MC68030 CPU+MMU, MC68882 FPU"; 423 machtype = LUNA_I; 424 cpuspeed = 20; delay_divisor = 102; /* 20MHz 68030 */ 425 hz = 60; 426 break; 427 #if defined(M68040) 428 case CPU_68040: 429 cpu = "MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches"; 430 machtype = LUNA_II; 431 cpuspeed = 25; delay_divisor = 300; /* 25MHz 68040 */ 432 break; 433 #endif 434 default: 435 panic("unknown CPU type"); 436 } 437 strcpy(cpu_model, cpu); 438 printf("%s\n", cpu_model); 439 } 440 441 /* 442 * machine dependent system variables. 443 */ 444 int 445 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 446 int *name; 447 u_int namelen; 448 void *oldp; 449 size_t *oldlenp; 450 void *newp; 451 size_t newlen; 452 struct proc *p; 453 { 454 dev_t consdev; 455 456 /* all sysctl names at this level are terminal */ 457 if (namelen != 1) 458 return (ENOTDIR); /* overloaded */ 459 460 switch (name[0]) { 461 case CPU_CONSDEV: 462 if (cn_tab != NULL) 463 consdev = cn_tab->cn_dev; 464 else 465 consdev = NODEV; 466 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 467 sizeof consdev)); 468 default: 469 return (EOPNOTSUPP); 470 } 471 /* NOTREACHED */ 472 } 473 474 int waittime = -1; 475 476 void 477 cpu_reboot(howto, bootstr) 478 volatile int howto; /* XXX to shutup GCC XXX */ 479 char *bootstr; 480 { 481 extern void doboot __P((void)); 482 483 /* take a snap shot before clobbering any registers */ 484 if (curproc && curproc->p_addr) 485 savectx(&curproc->p_addr->u_pcb); 486 487 /* If system is hold, just halt. */ 488 if (cold) { 489 howto |= RB_HALT; 490 goto haltsys; 491 } 492 493 boothowto = howto; 494 if ((howto & RB_NOSYNC) == 0 && waittime < 0) { 495 waittime = 0; 496 vfs_shutdown(); 497 /* 498 * If we've been adjusting the clock, the todr 499 * will be out of synch; adjust it now. 500 */ 501 resettodr(); 502 } 503 504 /* Disable interrupts. */ 505 splhigh(); 506 507 /* If rebooting and a dump is requested, do it. */ 508 if (howto & RB_DUMP) 509 dumpsys(); 510 511 haltsys: 512 /* Run any shutdown hooks. */ 513 doshutdownhooks(); 514 515 /* Finally, halt/reboot the system. */ 516 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 517 u_int8_t *pio = (void *)0x4d000000; 518 519 printf("power is going down.\n"); 520 DELAY(100000); 521 pio[3] = 0x94; 522 pio[2] = 0 << 4; 523 for (;;) /* NOP */; 524 } 525 if (howto & RB_HALT) { 526 printf("System halted. Hit any key to reboot.\n\n"); 527 (void)cngetc(); 528 } 529 530 printf("rebooting...\n"); 531 DELAY(100000); 532 doboot(); 533 /*NOTREACHED*/ 534 while (1) ; 535 } 536 537 /* 538 * Initialize the kernel crash dump header. 539 */ 540 void 541 cpu_init_kcore_hdr() 542 { 543 cpu_kcore_hdr_t *h = &cpu_kcore_hdr; 544 struct m68k_kcore_hdr *m = &h->un._m68k; 545 extern char end[]; 546 547 bzero(&cpu_kcore_hdr, sizeof(cpu_kcore_hdr)); 548 549 /* 550 * Initialize the `dispatcher' portion of the header. 551 */ 552 strcpy(h->name, machine); 553 h->page_size = NBPG; 554 h->kernbase = KERNBASE; 555 556 /* 557 * Fill in information about our MMU configuration. 558 */ 559 m->mmutype = mmutype; 560 m->sg_v = SG_V; 561 m->sg_frame = SG_FRAME; 562 m->sg_ishift = SG_ISHIFT; 563 m->sg_pmask = SG_PMASK; 564 m->sg40_shift1 = SG4_SHIFT1; 565 m->sg40_mask2 = SG4_MASK2; 566 m->sg40_shift2 = SG4_SHIFT2; 567 m->sg40_mask3 = SG4_MASK3; 568 m->sg40_shift3 = SG4_SHIFT3; 569 m->sg40_addr1 = SG4_ADDR1; 570 m->sg40_addr2 = SG4_ADDR2; 571 m->pg_v = PG_V; 572 m->pg_frame = PG_FRAME; 573 574 /* 575 * Initialize pointer to kernel segment table. 576 */ 577 m->sysseg_pa = (u_int32_t)(pmap_kernel()->pm_stpa); 578 579 /* 580 * Initialize relocation value such that: 581 * 582 * pa = (va - KERNBASE) + reloc 583 * 584 * Since we're linked and loaded at the same place, 585 * and the kernel is mapped va == pa, this is 0. 586 */ 587 m->reloc = 0; 588 589 /* 590 * Define the end of the relocatable range. 591 */ 592 m->relocend = (u_int32_t)end; 593 594 /* 595 * The luna68k has one contiguous memory segment. 596 */ 597 m->ram_segs[0].start = 0 /* lowram */; 598 m->ram_segs[0].size = ctob(physmem); 599 } 600 601 /* 602 * Compute the size of the machine-dependent crash dump header. 603 * Returns size in disk blocks. 604 */ 605 int 606 cpu_dumpsize() 607 { 608 int size; 609 610 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)); 611 return (btodb(roundup(size, dbtob(1)))); 612 } 613 614 /* 615 * Called by dumpsys() to dump the machine-dependent header. 616 */ 617 int 618 cpu_dump(dump, blknop) 619 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 620 daddr_t *blknop; 621 { 622 int buf[dbtob(1) / sizeof(int)]; 623 cpu_kcore_hdr_t *chdr; 624 kcore_seg_t *kseg; 625 int error; 626 627 kseg = (kcore_seg_t *)buf; 628 chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) / 629 sizeof(int)]; 630 631 /* Create the segment header. */ 632 CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 633 kseg->c_size = dbtob(1) - ALIGN(sizeof(kcore_seg_t)); 634 635 bcopy(&cpu_kcore_hdr, chdr, sizeof(cpu_kcore_hdr_t)); 636 error = (*dump)(dumpdev, *blknop, (caddr_t)buf, sizeof(buf)); 637 *blknop += btodb(sizeof(buf)); 638 return (error); 639 } 640 641 /* 642 * These variables are needed by /sbin/savecore 643 */ 644 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 645 int dumpsize = 0; /* pages */ 646 long dumplo = 0; /* blocks */ 647 648 /* 649 * This is called by main to set dumplo and dumpsize. 650 * Dumps always skip the first NBPG of disk space 651 * in case there might be a disk label stored there. 652 * If there is extra space, put dump at the end to 653 * reduce the chance that swapping trashes it. 654 */ 655 void 656 cpu_dumpconf() 657 { 658 int chdrsize; /* size of dump header */ 659 int nblks; /* size of dump area */ 660 int maj; 661 662 if (dumpdev == NODEV) 663 return; 664 maj = major(dumpdev); 665 if (maj < 0 || maj >= nblkdev) 666 panic("dumpconf: bad dumpdev=0x%x", dumpdev); 667 if (bdevsw[maj].d_psize == NULL) 668 return; 669 nblks = (*bdevsw[maj].d_psize)(dumpdev); 670 chdrsize = cpu_dumpsize(); 671 672 dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size); 673 674 /* 675 * Check do see if we will fit. Note we always skip the 676 * first NBPG in case there is a disk label there. 677 */ 678 if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) { 679 dumpsize = 0; 680 dumplo = -1; 681 return; 682 } 683 684 /* 685 * Put dump at the end of the partition. 686 */ 687 dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize; 688 } 689 690 /* 691 * Dump physical memory onto the dump device. Called by cpu_reboot(). 692 */ 693 void 694 dumpsys() 695 { 696 daddr_t blkno; /* current block to write */ 697 /* dump routine */ 698 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 699 int pg; /* page being dumped */ 700 paddr_t maddr; /* PA being dumped */ 701 int error; /* error code from (*dump)() */ 702 703 /* XXX initialized here because of gcc lossage */ 704 maddr = 0 /* lowram */; 705 pg = 0; 706 707 /* Make sure dump device is valid. */ 708 if (dumpdev == NODEV) 709 return; 710 if (dumpsize == 0) { 711 cpu_dumpconf(); 712 if (dumpsize == 0) 713 return; 714 } 715 if (dumplo <= 0) { 716 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 717 minor(dumpdev)); 718 return; 719 } 720 dump = bdevsw[major(dumpdev)].d_dump; 721 blkno = dumplo; 722 723 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 724 minor(dumpdev), dumplo); 725 726 printf("dump "); 727 728 /* Write the dump header. */ 729 error = cpu_dump(dump, &blkno); 730 if (error) 731 goto bad; 732 733 for (pg = 0; pg < dumpsize; pg++) { 734 #define NPGMB (1024*1024/NBPG) 735 /* print out how many MBs we have dumped */ 736 if (pg && (pg % NPGMB) == 0) 737 printf("%d ", pg / NPGMB); 738 #undef NPGMB 739 pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr, 740 VM_PROT_READ, VM_PROT_READ|PMAP_WIRED); 741 742 pmap_update(pmap_kernel()); 743 error = (*dump)(dumpdev, blkno, vmmap, NBPG); 744 bad: 745 switch (error) { 746 case 0: 747 maddr += NBPG; 748 blkno += btodb(NBPG); 749 break; 750 751 case ENXIO: 752 printf("device bad\n"); 753 return; 754 755 case EFAULT: 756 printf("device not ready\n"); 757 return; 758 759 case EINVAL: 760 printf("area improper\n"); 761 return; 762 763 case EIO: 764 printf("i/o error\n"); 765 return; 766 767 case EINTR: 768 printf("aborted from console\n"); 769 return; 770 771 default: 772 printf("error %d\n", error); 773 return; 774 } 775 } 776 printf("succeeded\n"); 777 } 778 779 void 780 straytrap(pc, evec) 781 int pc; 782 u_short evec; 783 { 784 printf("unexpected trap (vector offset %x) from %x\n", 785 evec & 0xFFF, pc); 786 } 787 788 int *nofault; 789 790 int 791 badaddr(addr, nbytes) 792 register caddr_t addr; 793 int nbytes; 794 { 795 register int i; 796 label_t faultbuf; 797 798 #ifdef lint 799 i = *addr; if (i) return (0); 800 #endif 801 802 nofault = (int *) &faultbuf; 803 if (setjmp((label_t *)nofault)) { 804 nofault = (int *) 0; 805 return(1); 806 } 807 808 switch (nbytes) { 809 case 1: 810 i = *(volatile char *)addr; 811 break; 812 813 case 2: 814 i = *(volatile short *)addr; 815 break; 816 817 case 4: 818 i = *(volatile int *)addr; 819 break; 820 821 default: 822 panic("badaddr: bad request"); 823 } 824 nofault = (int *) 0; 825 return (0); 826 } 827 828 void luna68k_abort __P((char *)); 829 830 static int innmihand; /* simple mutex */ 831 832 /* 833 * Level 7 interrupts are caused by e.g. the ABORT switch. 834 * 835 * If we have DDB, then break into DDB on ABORT. In a production 836 * environment, bumping the ABORT switch would be bad, so we enable 837 * panic'ing on ABORT with the kernel option "PANICBUTTON". 838 */ 839 void 840 nmihand(frame) 841 struct frame frame; 842 { 843 /* Prevent unwanted recursion */ 844 if (innmihand) 845 return; 846 innmihand = 1; 847 848 luna68k_abort("ABORT SWITCH"); 849 } 850 851 /* 852 * Common code for handling ABORT signals from buttons, switches, 853 * serial lines, etc. 854 */ 855 void 856 luna68k_abort(cp) 857 char *cp; 858 { 859 #ifdef DDB 860 printf("%s\n", cp); 861 cpu_Debugger(); 862 #else 863 #ifdef PANICBUTTON 864 panic(cp); 865 #else 866 printf("%s ignored\n", cp); 867 #endif /* PANICBUTTON */ 868 #endif /* DDB */ 869 } 870 871 /* 872 * cpu_exec_aout_makecmds(): 873 * cpu-dependent a.out format hook for execve(). 874 * 875 * Determine of the given exec package refers to something which we 876 * understand and, if so, set up the vmcmds for it. 877 */ 878 int 879 cpu_exec_aout_makecmds(p, epp) 880 struct proc *p; 881 struct exec_package *epp; 882 { 883 int error = ENOEXEC; 884 #ifdef COMPAT_SUNOS 885 extern sunos_exec_aout_makecmds 886 __P((struct proc *, struct exec_package *)); 887 if ((error = sunos_exec_aout_makecmds(p, epp)) == 0) 888 return 0; 889 #endif 890 return error; 891 } 892 893 /* 894 * Return the best possible estimate of the time in the timeval 895 * to which tvp points. Unfortunately, we can't read the hardware registers. 896 * We guarantee that the time will be greater than the value obtained by a 897 * previous call. 898 */ 899 void 900 microtime(tvp) 901 register struct timeval *tvp; 902 { 903 int s = splclock(); 904 static struct timeval lasttime; 905 906 *tvp = time; 907 #ifdef notdef 908 tvp->tv_usec += clkread(); 909 while (tvp->tv_usec >= 1000000) { 910 tvp->tv_sec++; 911 tvp->tv_usec -= 1000000; 912 } 913 #endif 914 if (tvp->tv_sec == lasttime.tv_sec && 915 tvp->tv_usec <= lasttime.tv_usec && 916 (tvp->tv_usec = lasttime.tv_usec + 1) >= 1000000) { 917 tvp->tv_sec++; 918 tvp->tv_usec -= 1000000; 919 } 920 lasttime = *tvp; 921 splx(s); 922 } 923 924 #if 1 925 926 struct consdev *cn_tab = &syscons; 927 928 #else 929 930 /* 931 * romcons is useful until m68k TC register is initialized. 932 */ 933 int romcngetc __P((dev_t)); 934 void romcnputc __P((dev_t, int)); 935 936 struct consdev romcons = { 937 NULL, 938 NULL, 939 romcngetc, 940 romcnputc, 941 nullcnpollc, 942 makedev(7, 0), /* XXX */ 943 CN_DEAD, 944 }; 945 struct consdev *cn_tab = &romcons; 946 947 #define __ ((int **)0x41000000) 948 #define GETC() (*(int (*)())__[6])() 949 #define PUTC(x) (*(void (*)())__[7])(x) 950 951 #define ROMPUTC(x) \ 952 ({ \ 953 register _r; \ 954 asm volatile (" \ 955 movc %%vbr,%0 ; \ 956 movel %0,%%sp@- ; \ 957 clrl %0 ; \ 958 movc %0,%%vbr" \ 959 : "=r" (_r)); \ 960 PUTC(x); \ 961 asm volatile (" \ 962 movel %%sp@+,%0 ; \ 963 movc %0,%%vbr" \ 964 : "=r" (_r)); \ 965 }) 966 967 #define ROMGETC() \ 968 ({ \ 969 register _r, _c; \ 970 asm volatile (" \ 971 movc %%vbr,%0 ; \ 972 movel %0,%%sp@- ; \ 973 clrl %0 ; \ 974 movc %0,%%vbr" \ 975 : "=r" (_r)); \ 976 _c = GETC(); \ 977 asm volatile (" \ 978 movel %%sp@+,%0 ; \ 979 movc %0,%%vbr" \ 980 : "=r" (_r)); \ 981 _c; \ 982 }) 983 984 void 985 romcnputc(dev, c) 986 dev_t dev; 987 int c; 988 { 989 int s; 990 991 s = splhigh(); 992 ROMPUTC(c); 993 splx(s); 994 } 995 996 int 997 romcngetc(dev) 998 dev_t dev; 999 { 1000 int s, c; 1001 1002 do { 1003 s = splhigh(); 1004 c = ROMGETC(); 1005 splx(s); 1006 } while (c == -1); 1007 return c; 1008 } 1009 #endif 1010
Indexes created Tue Sep 30 11:09:46 GMT 2025