machdep.c revision 1.31
1 /* $NetBSD: machdep.c,v 1.31 2003/06/23 11:01:25 martin 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 1.31 2003/06/23 11:01:25 martin Exp $"); 42 43 #include "opt_ddb.h" 44 #include "opt_kgdb.h" 45 #include "opt_compat_sunos.h" 46 #include "opt_panicbutton.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/proc.h> 52 #include <sys/buf.h> 53 #include <sys/reboot.h> 54 #include <sys/conf.h> 55 #include <sys/file.h> 56 #include <sys/device.h> 57 #include <sys/malloc.h> 58 #include <sys/mbuf.h> 59 #include <sys/msgbuf.h> 60 #include <sys/ioctl.h> 61 #include <sys/tty.h> 62 #include <sys/mount.h> 63 #include <sys/user.h> 64 #include <sys/exec.h> 65 #include <sys/core.h> 66 #include <sys/kcore.h> 67 #include <sys/vnode.h> 68 #include <sys/sa.h> 69 #include <sys/syscallargs.h> 70 #include <sys/ksyms.h> 71 #ifdef KGDB 72 #include <sys/kgdb.h> 73 #endif 74 #include <sys/boot_flag.h> 75 76 #include <uvm/uvm_extern.h> 77 78 #include <sys/sysctl.h> 79 80 #include <machine/cpu.h> 81 #include <machine/reg.h> 82 #include <machine/psl.h> 83 #include <machine/pte.h> 84 #include <machine/kcore.h> /* XXX should be pulled in by sys/kcore.h */ 85 86 #include <dev/cons.h> 87 88 #if defined(DDB) 89 #include <machine/db_machdep.h> 90 #include <ddb/db_sym.h> 91 #include <ddb/db_extern.h> 92 #endif 93 94 #include "ksyms.h" 95 96 /* 97 * Info for CTL_HW 98 */ 99 char machine[] = MACHINE; 100 char cpu_model[60]; 101 102 /* Our exported CPU info; we can have only one. */ 103 struct cpu_info cpu_info_store; 104 105 extern char kernel_text[]; 106 extern char etext[]; 107 108 struct vm_map *exec_map = NULL; 109 struct vm_map *mb_map = NULL; 110 struct vm_map *phys_map = NULL; 111 112 caddr_t msgbufaddr; 113 int maxmem; /* max memory per process */ 114 int physmem; /* set by locore */ 115 /* 116 * safepri is a safe priority for sleep to set for a spin-wait 117 * during autoconfiguration or after a panic. 118 */ 119 int safepri = PSL_LOWIPL; 120 121 void luna68k_init __P((void)); 122 void identifycpu __P((void)); 123 void dumpsys __P((void)); 124 125 void straytrap __P((int, u_short)); 126 void nmihand __P((struct frame)); 127 128 int cpu_dumpsize __P((void)); 129 int cpu_dump __P((int (*)(dev_t, daddr_t, caddr_t, size_t), daddr_t *)); 130 void cpu_init_kcore_hdr __P((void)); 131 132 /* 133 * Machine-independent crash dump header info. 134 */ 135 cpu_kcore_hdr_t cpu_kcore_hdr; 136 137 int machtype; /* model: 1 for LUNA-1, 2 for LUNA-2 */ 138 int sysconsole; /* console: 0 for ttya, 1 for video */ 139 140 extern struct consdev syscons; 141 extern void omfb_cnattach __P((void)); 142 extern void ws_cnattach __P((void)); 143 extern void syscnattach __P((int)); 144 145 /* 146 * On the 68020/68030, the value of delay_divisor is roughly 147 * 2048 / cpuspeed (where cpuspeed is in MHz). 148 * 149 * On the 68040/68060(?), the value of delay_divisor is roughly 150 * 759 / cpuspeed (where cpuspeed is in MHz). 151 * XXX -- is the above formula correct? 152 */ 153 int cpuspeed = 25; /* only used for printing later */ 154 int delay_divisor = 300; /* for delay() loop count */ 155 156 /* 157 * Early initialization, before main() is called. 158 */ 159 void 160 luna68k_init() 161 { 162 volatile unsigned char *pio0 = (void *)0x49000000; 163 int sw1, i; 164 char *cp; 165 extern char bootarg[64]; 166 167 extern paddr_t avail_start, avail_end; 168 169 /* 170 * Tell the VM system about available physical memory. The 171 * luna68k only has one segment. 172 */ 173 uvm_page_physload(atop(avail_start), atop(avail_end), 174 atop(avail_start), atop(avail_end), VM_FREELIST_DEFAULT); 175 176 /* 177 * Initialize error message buffer (at end of core). 178 * avail_end was pre-decremented in pmap_bootstrap to compensate. 179 */ 180 for (i = 0; i < btoc(MSGBUFSIZE); i++) 181 pmap_enter(pmap_kernel(), (vaddr_t)msgbufaddr + i * PAGE_SIZE, 182 avail_end + i * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 183 VM_PROT_READ|VM_PROT_WRITE|PMAP_WIRED); 184 pmap_update(pmap_kernel()); 185 initmsgbuf(msgbufaddr, m68k_round_page(MSGBUFSIZE)); 186 187 188 pio0[3] = 0xb6; 189 pio0[2] = 1 << 6; /* enable parity check */ 190 pio0[3] = 0xb6; 191 sw1 = pio0[0]; /* dipssw1 value */ 192 sw1 ^= 0xff; 193 sysconsole = !(sw1 & 0x2); /* console selection */ 194 195 boothowto = 0; 196 i = 0; 197 /* 198 * 'bootarg' has; 199 * "<args of x command> ENADDR=<addr> HOST=<host> SERVER=<name>" 200 * where <addr> is MAC address of which network loader used (not 201 * necessarily same as one at 0x4101.FFE0), <host> and <name> 202 * are the values of HOST and SERVER environment variables, 203 * 204 * NetBSD/luna68k cares only the first argment; any of "sda". 205 */ 206 for (cp = bootarg; *cp != ' '; cp++) { 207 BOOT_FLAG(*cp, boothowto); 208 if (i++ >= sizeof(bootarg)) 209 break; 210 } 211 #if 0 /* overload 1:sw1, which now means 'go ROM monitor' after poweron */ 212 if (boothowto == 0) 213 boothowto = (sw1 & 0x1) ? RB_SINGLE : 0; 214 #endif 215 } 216 217 /* 218 * Console initialization: called early on from main, 219 */ 220 void 221 consinit() 222 { 223 if (sysconsole == 0) 224 syscnattach(0); 225 else { 226 omfb_cnattach(); 227 ws_cnattach(); 228 } 229 230 #if NKSYMS || defined(DDB) || defined(LKM) 231 { 232 extern int end; 233 extern int *esym; 234 235 ksyms_init(*(int *)&end, ((int *)&end) + 1, esym); 236 } 237 #endif 238 #ifdef DDB 239 if (boothowto & RB_KDB) 240 cpu_Debugger(); 241 #endif 242 } 243 244 /* 245 * cpu_startup: allocate memory for variable-sized tables. 246 */ 247 void 248 cpu_startup() 249 { 250 caddr_t v; 251 u_int i, base, residual; 252 vaddr_t minaddr, maxaddr; 253 vsize_t size; 254 char pbuf[9]; 255 extern void greeting __P((void)); 256 257 if (fputype != FPU_NONE) 258 m68k_make_fpu_idle_frame(); 259 260 /* 261 * Initialize the kernel crash dump header. 262 */ 263 cpu_init_kcore_hdr(); 264 265 /* 266 * Good {morning,afternoon,evening,night}. 267 */ 268 printf(version); 269 identifycpu(); 270 271 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 272 printf("total memory = %s\n", pbuf); 273 274 /* 275 * Find out how much space we need, allocate it, 276 * and then give everything true virtual addresses. 277 */ 278 size = (int)allocsys(NULL, NULL); 279 if ((v = (caddr_t)uvm_km_alloc(kernel_map, round_page(size))) == 0) 280 panic("startup: no room for tables"); 281 if (allocsys(v, NULL) - v != size) 282 panic("startup: table size inconsistency"); 283 284 /* 285 * Now allocate buffers proper. They are different than the above 286 * in that they usually occupy more virtual memory than physical. 287 */ 288 size = MAXBSIZE * nbuf; 289 if (uvm_map(kernel_map, (vaddr_t *) &buffers, round_page(size), 290 NULL, UVM_UNKNOWN_OFFSET, 0, 291 UVM_MAPFLAG(UVM_PROT_NONE, UVM_PROT_NONE, UVM_INH_NONE, 292 UVM_ADV_NORMAL, 0)) != 0) 293 panic("startup: cannot allocate VM for buffers"); 294 minaddr = (vaddr_t)buffers; 295 if ((bufpages / nbuf) >= btoc(MAXBSIZE)) { 296 /* don't want to alloc more physical mem than needed */ 297 bufpages = btoc(MAXBSIZE) * nbuf; 298 } 299 base = bufpages / nbuf; 300 residual = bufpages % nbuf; 301 for (i = 0; i < nbuf; i++) { 302 vsize_t curbufsize; 303 vaddr_t curbuf; 304 struct vm_page *pg; 305 306 /* 307 * Each buffer has MAXBSIZE bytes of VM space allocated. Of 308 * that MAXBSIZE space, we allocate and map (base+1) pages 309 * for the first "residual" buffers, and then we allocate 310 * "base" pages for the rest. 311 */ 312 curbuf = (vsize_t) buffers + (i * MAXBSIZE); 313 curbufsize = PAGE_SIZE * ((i < residual) ? (base+1) : base); 314 315 while (curbufsize) { 316 pg = uvm_pagealloc(NULL, 0, NULL, 0); 317 if (pg == NULL) 318 panic("cpu_startup: not enough memory for " 319 "buffer cache"); 320 pmap_kenter_pa(curbuf, VM_PAGE_TO_PHYS(pg), 321 VM_PROT_READ|VM_PROT_WRITE); 322 curbuf += PAGE_SIZE; 323 curbufsize -= PAGE_SIZE; 324 } 325 } 326 pmap_update(pmap_kernel()); 327 328 /* 329 * Allocate a submap for exec arguments. This map effectively 330 * limits the number of processes exec'ing at any time. 331 */ 332 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 333 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 334 335 /* 336 * Allocate a submap for physio 337 */ 338 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 339 VM_PHYS_SIZE, 0, FALSE, NULL); 340 341 /* 342 * Finally, allocate mbuf cluster submap. 343 */ 344 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 345 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 346 FALSE, NULL); 347 348 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 349 printf("avail memory = %s\n", pbuf); 350 format_bytes(pbuf, sizeof(pbuf), bufpages * PAGE_SIZE); 351 printf("using %u buffers containing %s of memory\n", nbuf, pbuf); 352 353 /* 354 * Tell the VM system that the area before the text segment 355 * is invalid. 356 * 357 * XXX Should just change KERNBASE and VM_MIN_KERNEL_ADDRESS, 358 * XXX but not right now. 359 */ 360 if (uvm_map_protect(kernel_map, 0, round_page((vaddr_t)&kernel_text), 361 UVM_PROT_NONE, TRUE) != 0) 362 panic("can't mark pre-text pages off-limits"); 363 364 /* 365 * Tell the VM system that writing to kernel text isn't allowed. 366 * If we don't, we might end up COW'ing the text segment! 367 */ 368 if (uvm_map_protect(kernel_map, trunc_page((vaddr_t)&kernel_text), 369 trunc_page((vaddr_t)&etext), UVM_PROT_READ|UVM_PROT_EXEC, TRUE) 370 != 0) 371 panic("can't protect kernel text"); 372 373 /* 374 * Set up buffers, so they can be used to read disk labels. 375 */ 376 bufinit(); 377 378 /* 379 * Say "Hi" to the world 380 */ 381 greeting(); 382 } 383 384 /* 385 * Set registers on exec. 386 */ 387 void 388 setregs(l, pack, stack) 389 struct lwp *l; 390 struct exec_package *pack; 391 u_long stack; 392 { 393 struct frame *frame = (struct frame *)l->l_md.md_regs; 394 extern int fputype; 395 396 frame->f_sr = PSL_USERSET; 397 frame->f_pc = pack->ep_entry & ~1; 398 frame->f_regs[D0] = 0; 399 frame->f_regs[D1] = 0; 400 frame->f_regs[D2] = 0; 401 frame->f_regs[D3] = 0; 402 frame->f_regs[D4] = 0; 403 frame->f_regs[D5] = 0; 404 frame->f_regs[D6] = 0; 405 frame->f_regs[D7] = 0; 406 frame->f_regs[A0] = 0; 407 frame->f_regs[A1] = 0; 408 frame->f_regs[A2] = (int)l->l_proc->p_psstr; 409 frame->f_regs[A3] = 0; 410 frame->f_regs[A4] = 0; 411 frame->f_regs[A5] = 0; 412 frame->f_regs[A6] = 0; 413 frame->f_regs[SP] = stack; 414 415 /* restore a null state frame */ 416 l->l_addr->u_pcb.pcb_fpregs.fpf_null = 0; 417 if (fputype) 418 m68881_restore(&l->l_addr->u_pcb.pcb_fpregs); 419 } 420 421 void 422 identifycpu() 423 { 424 extern int cputype; 425 char *cpu; 426 427 bzero(cpu_model, sizeof(cpu_model)); 428 switch (cputype) { 429 case CPU_68030: 430 cpu = "MC68030 CPU+MMU, MC68882 FPU"; 431 machtype = LUNA_I; 432 cpuspeed = 20; delay_divisor = 102; /* 20MHz 68030 */ 433 hz = 60; 434 break; 435 #if defined(M68040) 436 case CPU_68040: 437 cpu = "MC68040 CPU+MMU+FPU, 4k on-chip physical I/D caches"; 438 machtype = LUNA_II; 439 cpuspeed = 25; delay_divisor = 300; /* 25MHz 68040 */ 440 break; 441 #endif 442 default: 443 panic("unknown CPU type"); 444 } 445 strcpy(cpu_model, cpu); 446 printf("%s\n", cpu_model); 447 } 448 449 /* 450 * machine dependent system variables. 451 */ 452 int 453 cpu_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 454 int *name; 455 u_int namelen; 456 void *oldp; 457 size_t *oldlenp; 458 void *newp; 459 size_t newlen; 460 struct proc *p; 461 { 462 dev_t consdev; 463 464 /* all sysctl names at this level are terminal */ 465 if (namelen != 1) 466 return (ENOTDIR); /* overloaded */ 467 468 switch (name[0]) { 469 case CPU_CONSDEV: 470 if (cn_tab != NULL) 471 consdev = cn_tab->cn_dev; 472 else 473 consdev = NODEV; 474 return (sysctl_rdstruct(oldp, oldlenp, newp, &consdev, 475 sizeof consdev)); 476 default: 477 return (EOPNOTSUPP); 478 } 479 /* NOTREACHED */ 480 } 481 482 int waittime = -1; 483 484 void 485 cpu_reboot(howto, bootstr) 486 volatile int howto; /* XXX to shutup GCC XXX */ 487 char *bootstr; 488 { 489 extern void doboot __P((void)); 490 491 /* take a snap shot before clobbering any registers */ 492 if (curlwp && curlwp->l_addr) 493 savectx(&curlwp->l_addr->u_pcb); 494 495 /* If system is hold, just halt. */ 496 if (cold) { 497 howto |= RB_HALT; 498 goto haltsys; 499 } 500 501 boothowto = howto; 502 if ((howto & RB_NOSYNC) == 0 && waittime < 0) { 503 waittime = 0; 504 vfs_shutdown(); 505 /* 506 * If we've been adjusting the clock, the todr 507 * will be out of synch; adjust it now. 508 */ 509 resettodr(); 510 } 511 512 /* Disable interrupts. */ 513 splhigh(); 514 515 /* If rebooting and a dump is requested, do it. */ 516 if (howto & RB_DUMP) 517 dumpsys(); 518 519 haltsys: 520 /* Run any shutdown hooks. */ 521 doshutdownhooks(); 522 523 /* Finally, halt/reboot the system. */ 524 if ((howto & RB_POWERDOWN) == RB_POWERDOWN) { 525 u_int8_t *pio = (void *)0x4d000000; 526 527 printf("power is going down.\n"); 528 DELAY(100000); 529 pio[3] = 0x94; 530 pio[2] = 0 << 4; 531 for (;;) /* NOP */; 532 } 533 if (howto & RB_HALT) { 534 printf("System halted. Hit any key to reboot.\n\n"); 535 (void)cngetc(); 536 } 537 538 printf("rebooting...\n"); 539 DELAY(100000); 540 doboot(); 541 /*NOTREACHED*/ 542 while (1) ; 543 } 544 545 /* 546 * Initialize the kernel crash dump header. 547 */ 548 void 549 cpu_init_kcore_hdr() 550 { 551 cpu_kcore_hdr_t *h = &cpu_kcore_hdr; 552 struct m68k_kcore_hdr *m = &h->un._m68k; 553 extern char end[]; 554 555 bzero(&cpu_kcore_hdr, sizeof(cpu_kcore_hdr)); 556 557 /* 558 * Initialize the `dispatcher' portion of the header. 559 */ 560 strcpy(h->name, machine); 561 h->page_size = PAGE_SIZE; 562 h->kernbase = KERNBASE; 563 564 /* 565 * Fill in information about our MMU configuration. 566 */ 567 m->mmutype = mmutype; 568 m->sg_v = SG_V; 569 m->sg_frame = SG_FRAME; 570 m->sg_ishift = SG_ISHIFT; 571 m->sg_pmask = SG_PMASK; 572 m->sg40_shift1 = SG4_SHIFT1; 573 m->sg40_mask2 = SG4_MASK2; 574 m->sg40_shift2 = SG4_SHIFT2; 575 m->sg40_mask3 = SG4_MASK3; 576 m->sg40_shift3 = SG4_SHIFT3; 577 m->sg40_addr1 = SG4_ADDR1; 578 m->sg40_addr2 = SG4_ADDR2; 579 m->pg_v = PG_V; 580 m->pg_frame = PG_FRAME; 581 582 /* 583 * Initialize pointer to kernel segment table. 584 */ 585 m->sysseg_pa = (u_int32_t)(pmap_kernel()->pm_stpa); 586 587 /* 588 * Initialize relocation value such that: 589 * 590 * pa = (va - KERNBASE) + reloc 591 * 592 * Since we're linked and loaded at the same place, 593 * and the kernel is mapped va == pa, this is 0. 594 */ 595 m->reloc = 0; 596 597 /* 598 * Define the end of the relocatable range. 599 */ 600 m->relocend = (u_int32_t)end; 601 602 /* 603 * The luna68k has one contiguous memory segment. 604 */ 605 m->ram_segs[0].start = 0 /* lowram */; 606 m->ram_segs[0].size = ctob(physmem); 607 } 608 609 /* 610 * Compute the size of the machine-dependent crash dump header. 611 * Returns size in disk blocks. 612 */ 613 int 614 cpu_dumpsize() 615 { 616 int size; 617 618 size = ALIGN(sizeof(kcore_seg_t)) + ALIGN(sizeof(cpu_kcore_hdr_t)); 619 return (btodb(roundup(size, dbtob(1)))); 620 } 621 622 /* 623 * Called by dumpsys() to dump the machine-dependent header. 624 */ 625 int 626 cpu_dump(dump, blknop) 627 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 628 daddr_t *blknop; 629 { 630 int buf[dbtob(1) / sizeof(int)]; 631 cpu_kcore_hdr_t *chdr; 632 kcore_seg_t *kseg; 633 int error; 634 635 kseg = (kcore_seg_t *)buf; 636 chdr = (cpu_kcore_hdr_t *)&buf[ALIGN(sizeof(kcore_seg_t)) / 637 sizeof(int)]; 638 639 /* Create the segment header. */ 640 CORE_SETMAGIC(*kseg, KCORE_MAGIC, MID_MACHINE, CORE_CPU); 641 kseg->c_size = dbtob(1) - ALIGN(sizeof(kcore_seg_t)); 642 643 bcopy(&cpu_kcore_hdr, chdr, sizeof(cpu_kcore_hdr_t)); 644 error = (*dump)(dumpdev, *blknop, (caddr_t)buf, sizeof(buf)); 645 *blknop += btodb(sizeof(buf)); 646 return (error); 647 } 648 649 /* 650 * These variables are needed by /sbin/savecore 651 */ 652 u_int32_t dumpmag = 0x8fca0101; /* magic number */ 653 int dumpsize = 0; /* pages */ 654 long dumplo = 0; /* blocks */ 655 656 /* 657 * This is called by main to set dumplo and dumpsize. 658 * Dumps always skip the first PAGE_SIZE of disk space 659 * in case there might be a disk label stored there. 660 * If there is extra space, put dump at the end to 661 * reduce the chance that swapping trashes it. 662 */ 663 void 664 cpu_dumpconf() 665 { 666 const struct bdevsw *bdev; 667 int chdrsize; /* size of dump header */ 668 int nblks; /* size of dump area */ 669 670 if (dumpdev == NODEV) 671 return; 672 bdev = bdevsw_lookup(dumpdev); 673 if (bdev == NULL) 674 panic("dumpconf: bad dumpdev=0x%x", dumpdev); 675 if (bdev->d_psize == NULL) 676 return; 677 nblks = (*bdev->d_psize)(dumpdev); 678 chdrsize = cpu_dumpsize(); 679 680 dumpsize = btoc(cpu_kcore_hdr.un._m68k.ram_segs[0].size); 681 682 /* 683 * Check do see if we will fit. Note we always skip the 684 * first PAGE_SIZE in case there is a disk label there. 685 */ 686 if (nblks < (ctod(dumpsize) + chdrsize + ctod(1))) { 687 dumpsize = 0; 688 dumplo = -1; 689 return; 690 } 691 692 /* 693 * Put dump at the end of the partition. 694 */ 695 dumplo = (nblks - 1) - ctod(dumpsize) - chdrsize; 696 } 697 698 /* 699 * Dump physical memory onto the dump device. Called by cpu_reboot(). 700 */ 701 void 702 dumpsys() 703 { 704 const struct bdevsw *bdev; 705 daddr_t blkno; /* current block to write */ 706 /* dump routine */ 707 int (*dump) __P((dev_t, daddr_t, caddr_t, size_t)); 708 int pg; /* page being dumped */ 709 paddr_t maddr; /* PA being dumped */ 710 int error; /* error code from (*dump)() */ 711 712 /* XXX initialized here because of gcc lossage */ 713 maddr = 0 /* lowram */; 714 pg = 0; 715 716 /* Make sure dump device is valid. */ 717 if (dumpdev == NODEV) 718 return; 719 bdev = bdevsw_lookup(dumpdev); 720 if (bdev == NULL) 721 return; 722 if (dumpsize == 0) { 723 cpu_dumpconf(); 724 if (dumpsize == 0) 725 return; 726 } 727 if (dumplo <= 0) { 728 printf("\ndump to dev %u,%u not possible\n", major(dumpdev), 729 minor(dumpdev)); 730 return; 731 } 732 dump = bdev->d_dump; 733 blkno = dumplo; 734 735 printf("\ndumping to dev %u,%u offset %ld\n", major(dumpdev), 736 minor(dumpdev), dumplo); 737 738 printf("dump "); 739 740 /* Write the dump header. */ 741 error = cpu_dump(dump, &blkno); 742 if (error) 743 goto bad; 744 745 for (pg = 0; pg < dumpsize; pg++) { 746 #define NPGMB (1024*1024/PAGE_SIZE) 747 /* print out how many MBs we have dumped */ 748 if (pg && (pg % NPGMB) == 0) 749 printf("%d ", pg / NPGMB); 750 #undef NPGMB 751 pmap_enter(pmap_kernel(), (vaddr_t)vmmap, maddr, 752 VM_PROT_READ, VM_PROT_READ|PMAP_WIRED); 753 754 pmap_update(pmap_kernel()); 755 error = (*dump)(dumpdev, blkno, vmmap, PAGE_SIZE); 756 bad: 757 switch (error) { 758 case 0: 759 maddr += PAGE_SIZE; 760 blkno += btodb(PAGE_SIZE); 761 break; 762 763 case ENXIO: 764 printf("device bad\n"); 765 return; 766 767 case EFAULT: 768 printf("device not ready\n"); 769 return; 770 771 case EINVAL: 772 printf("area improper\n"); 773 return; 774 775 case EIO: 776 printf("i/o error\n"); 777 return; 778 779 case EINTR: 780 printf("aborted from console\n"); 781 return; 782 783 default: 784 printf("error %d\n", error); 785 return; 786 } 787 } 788 printf("succeeded\n"); 789 } 790 791 void 792 straytrap(pc, evec) 793 int pc; 794 u_short evec; 795 { 796 printf("unexpected trap (vector offset %x) from %x\n", 797 evec & 0xFFF, pc); 798 } 799 800 int *nofault; 801 802 int 803 badaddr(addr, nbytes) 804 register caddr_t addr; 805 int nbytes; 806 { 807 register int i; 808 label_t faultbuf; 809 810 #ifdef lint 811 i = *addr; if (i) return (0); 812 #endif 813 814 nofault = (int *) &faultbuf; 815 if (setjmp((label_t *)nofault)) { 816 nofault = (int *) 0; 817 return(1); 818 } 819 820 switch (nbytes) { 821 case 1: 822 i = *(volatile char *)addr; 823 break; 824 825 case 2: 826 i = *(volatile short *)addr; 827 break; 828 829 case 4: 830 i = *(volatile int *)addr; 831 break; 832 833 default: 834 panic("badaddr: bad request"); 835 } 836 nofault = (int *) 0; 837 return (0); 838 } 839 840 void luna68k_abort __P((char *)); 841 842 static int innmihand; /* simple mutex */ 843 844 /* 845 * Level 7 interrupts are caused by e.g. the ABORT switch. 846 * 847 * If we have DDB, then break into DDB on ABORT. In a production 848 * environment, bumping the ABORT switch would be bad, so we enable 849 * panic'ing on ABORT with the kernel option "PANICBUTTON". 850 */ 851 void 852 nmihand(frame) 853 struct frame frame; 854 { 855 /* Prevent unwanted recursion */ 856 if (innmihand) 857 return; 858 innmihand = 1; 859 860 luna68k_abort("ABORT SWITCH"); 861 } 862 863 /* 864 * Common code for handling ABORT signals from buttons, switches, 865 * serial lines, etc. 866 */ 867 void 868 luna68k_abort(cp) 869 char *cp; 870 { 871 #ifdef DDB 872 printf("%s\n", cp); 873 cpu_Debugger(); 874 #else 875 #ifdef PANICBUTTON 876 panic(cp); 877 #else 878 printf("%s ignored\n", cp); 879 #endif /* PANICBUTTON */ 880 #endif /* DDB */ 881 } 882 883 /* 884 * cpu_exec_aout_makecmds(): 885 * cpu-dependent a.out format hook for execve(). 886 * 887 * Determine of the given exec package refers to something which we 888 * understand and, if so, set up the vmcmds for it. 889 */ 890 int 891 cpu_exec_aout_makecmds(p, epp) 892 struct proc *p; 893 struct exec_package *epp; 894 { 895 int error = ENOEXEC; 896 #ifdef COMPAT_SUNOS 897 extern sunos_exec_aout_makecmds 898 __P((struct proc *, struct exec_package *)); 899 if ((error = sunos_exec_aout_makecmds(p, epp)) == 0) 900 return 0; 901 #endif 902 return error; 903 } 904 905 /* 906 * Return the best possible estimate of the time in the timeval 907 * to which tvp points. Unfortunately, we can't read the hardware registers. 908 * We guarantee that the time will be greater than the value obtained by a 909 * previous call. 910 */ 911 void 912 microtime(tvp) 913 register struct timeval *tvp; 914 { 915 int s = splclock(); 916 static struct timeval lasttime; 917 918 *tvp = time; 919 #ifdef notdef 920 tvp->tv_usec += clkread(); 921 while (tvp->tv_usec >= 1000000) { 922 tvp->tv_sec++; 923 tvp->tv_usec -= 1000000; 924 } 925 #endif 926 if (tvp->tv_sec == lasttime.tv_sec && 927 tvp->tv_usec <= lasttime.tv_usec && 928 (tvp->tv_usec = lasttime.tv_usec + 1) >= 1000000) { 929 tvp->tv_sec++; 930 tvp->tv_usec -= 1000000; 931 } 932 lasttime = *tvp; 933 splx(s); 934 } 935 936 #if 1 937 938 struct consdev *cn_tab = &syscons; 939 940 #else 941 942 /* 943 * romcons is useful until m68k TC register is initialized. 944 */ 945 int romcngetc __P((dev_t)); 946 void romcnputc __P((dev_t, int)); 947 948 struct consdev romcons = { 949 NULL, 950 NULL, 951 romcngetc, 952 romcnputc, 953 nullcnpollc, 954 makedev(7, 0), /* XXX */ 955 CN_DEAD, 956 }; 957 struct consdev *cn_tab = &romcons; 958 959 #define __ ((int **)0x41000000) 960 #define GETC() (*(int (*)())__[6])() 961 #define PUTC(x) (*(void (*)())__[7])(x) 962 963 #define ROMPUTC(x) \ 964 ({ \ 965 register _r; \ 966 asm volatile (" \ 967 movc %%vbr,%0 ; \ 968 movel %0,%%sp@- ; \ 969 clrl %0 ; \ 970 movc %0,%%vbr" \ 971 : "=r" (_r)); \ 972 PUTC(x); \ 973 asm volatile (" \ 974 movel %%sp@+,%0 ; \ 975 movc %0,%%vbr" \ 976 : "=r" (_r)); \ 977 }) 978 979 #define ROMGETC() \ 980 ({ \ 981 register _r, _c; \ 982 asm volatile (" \ 983 movc %%vbr,%0 ; \ 984 movel %0,%%sp@- ; \ 985 clrl %0 ; \ 986 movc %0,%%vbr" \ 987 : "=r" (_r)); \ 988 _c = GETC(); \ 989 asm volatile (" \ 990 movel %%sp@+,%0 ; \ 991 movc %0,%%vbr" \ 992 : "=r" (_r)); \ 993 _c; \ 994 }) 995 996 void 997 romcnputc(dev, c) 998 dev_t dev; 999 int c; 1000 { 1001 int s; 1002 1003 s = splhigh(); 1004 ROMPUTC(c); 1005 splx(s); 1006 } 1007 1008 int 1009 romcngetc(dev) 1010 dev_t dev; 1011 { 1012 int s, c; 1013 1014 do { 1015 s = splhigh(); 1016 c = ROMGETC(); 1017 splx(s); 1018 } while (c == -1); 1019 return c; 1020 } 1021 #endif 1022
Indexes created Wed Oct 01 18:09:54 GMT 2025