1 /* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1992 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department, The Mach Operating System project at 9 * Carnegie-Mellon University and Ralph Campbell. 10 * 11 * %sccs.include.redist.c% 12 * 13 * @(#)machdep.c 7.5 (Berkeley) 03/22/92 14 */ 15 16 /* from: Utah $Hdr: machdep.c 1.63 91/04/24$ */ 17 18 #include "param.h" 19 #include "systm.h" 20 #include "signalvar.h" 21 #include "kernel.h" 22 #include "map.h" 23 #include "proc.h" 24 #include "buf.h" 25 #include "reboot.h" 26 #include "conf.h" 27 #include "file.h" 28 #include "clist.h" 29 #include "callout.h" 30 #include "malloc.h" 31 #include "mbuf.h" 32 #include "msgbuf.h" 33 #include "user.h" 34 #ifdef SYSVSHM 35 #include "shm.h" 36 #endif 37 38 #include "vm/vm.h" 39 #include "vm/vm_kern.h" 40 #include "vm/vm_page.h" 41 42 #include "../include/cpu.h" 43 #include "../include/reg.h" 44 #include "../include/psl.h" 45 #include "../include/machMon.h" 46 #include "../include/pte.h" 47 48 #include "../dev/device.h" 49 50 #include "clockreg.h" 51 52 vm_map_t buffer_map; 53 54 /* 55 * Declare these as initialized data so we can patch them. 56 */ 57 int nswbuf = 0; 58 #ifdef NBUF 59 int nbuf = NBUF; 60 #else 61 int nbuf = 0; 62 #endif 63 #ifdef BUFPAGES 64 int bufpages = BUFPAGES; 65 #else 66 int bufpages = 0; 67 #endif 68 int msgbufmapped; /* set when safe to use msgbuf */ 69 int maxmem; /* max memory per process */ 70 int physmem; /* max supported memory, changes to actual */ 71 /* 72 * safepri is a safe priority for sleep to set for a spin-wait 73 * during autoconfiguration or after a panic. 74 */ 75 int safepri = PSL_LOWIPL; 76 77 struct user *proc0paddr; 78 struct proc nullproc; /* for use by swtch_exit() */ 79 80 /* 81 * Do all the stuff that locore normally does before calling main(). 82 * Process arguments passed to us by the prom monitor. 83 * Return the first page address following the system. 84 */ 85 mach_init(argc, argv) 86 int argc; 87 char *argv[]; 88 { 89 register char *cp; 90 register int i; 91 register unsigned firstaddr; 92 register caddr_t v; 93 caddr_t start; 94 extern char edata[], end[]; 95 extern char MachUTLBMiss[], MachUTLBMissEnd[]; 96 extern char MachException[], MachExceptionEnd[]; 97 #ifdef ATTR 98 extern char *pmap_attributes; 99 #endif 100 101 /* clear the BSS segment */ 102 v = (caddr_t)pmax_round_page(end); 103 bzero(edata, v - edata); 104 105 #ifdef DS5000 106 /* check for direct boot from DS5000 PROM */ 107 if (argc > 0 && strcmp(argv[0], "boot") == 0) { 108 argc--; 109 argv++; 110 } 111 #endif 112 113 /* look at argv[0] and compute bootdev */ 114 makebootdev(argv[0]); 115 116 /* 117 * Look at arguments passed to us and compute boothowto. 118 */ 119 #ifdef GENERIC 120 boothowto = RB_SINGLE | RB_ASKNAME; 121 #else 122 boothowto = RB_SINGLE; 123 #endif 124 #ifdef KADB 125 boothowto |= RB_KDB; 126 #endif 127 if (argc > 1) { 128 for (i = 1; i < argc; i++) { 129 for (cp = argv[i]; *cp; cp++) { 130 switch (*cp) { 131 case 'a': /* autoboot */ 132 boothowto &= ~RB_SINGLE; 133 break; 134 135 case 'd': /* use compiled in default root */ 136 boothowto |= RB_DFLTROOT; 137 break; 138 139 case 'm': /* mini root present in memory */ 140 boothowto |= RB_MINIROOT; 141 break; 142 143 case 'n': /* ask for names */ 144 boothowto |= RB_ASKNAME; 145 break; 146 147 case 'N': /* don't ask for names */ 148 boothowto &= ~RB_ASKNAME; 149 } 150 } 151 } 152 } 153 154 #ifdef MFS 155 /* 156 * Check to see if a mini-root was loaded into memory. It resides 157 * at the start of the next page just after the end of BSS. 158 */ 159 if (boothowto & RB_MINIROOT) 160 v += mfs_initminiroot(v); 161 #endif 162 163 /* 164 * Init mapping for u page(s) for proc[0], pm_tlbpid 1. 165 */ 166 start = v; 167 curproc->p_addr = proc0paddr = (struct user *)v; 168 curproc->p_md.md_regs = proc0paddr->u_pcb.pcb_regs; 169 firstaddr = MACH_CACHED_TO_PHYS(v); 170 for (i = 0; i < UPAGES; i++) { 171 MachTLBWriteIndexed(i, 172 (UADDR + (i << PGSHIFT)) | (1 << VMMACH_TLB_PID_SHIFT), 173 curproc->p_md.md_upte[i] = firstaddr | PG_V | PG_M); 174 firstaddr += NBPG; 175 } 176 v += UPAGES * NBPG; 177 MachSetPID(1); 178 179 /* 180 * init nullproc for swtch_exit(). 181 * init mapping for u page(s), pm_tlbpid 0 182 * This could be used for an idle process. 183 */ 184 nullproc.p_addr = (struct user *)v; 185 nullproc.p_md.md_regs = ((struct user *)v)->u_pcb.pcb_regs; 186 for (i = 0; i < UPAGES; i++) { 187 nullproc.p_md.md_upte[i] = firstaddr | PG_V | PG_M; 188 firstaddr += NBPG; 189 } 190 v += UPAGES * NBPG; 191 192 /* clear pages for u areas */ 193 bzero(start, v - start); 194 195 /* 196 * Copy down exception vector code. 197 */ 198 if (MachUTLBMissEnd - MachUTLBMiss > 0x80) 199 panic("startup: UTLB code too large"); 200 bcopy(MachUTLBMiss, (char *)MACH_UTLB_MISS_EXC_VEC, 201 MachUTLBMissEnd - MachUTLBMiss); 202 bcopy(MachException, (char *)MACH_GEN_EXC_VEC, 203 MachExceptionEnd - MachException); 204 205 /* 206 * Clear out the I and D caches. 207 */ 208 MachConfigCache(); 209 MachFlushCache(); 210 211 /* 212 * Determine what model of computer we are running on. 213 */ 214 { 215 char *(*f)() = (char *(*)())MACH_MON_GETENV2; 216 217 if (cp = (*f)("systype")) 218 i = atoi(cp); 219 else 220 cp = ""; 221 222 /* check for MIPS based platform */ 223 if (((i >> 24) & 0xFF) != 0x82) { 224 printf("Unknown System type '%s'\n", cp); 225 boot(RB_HALT | RB_NOSYNC); 226 } 227 } 228 229 /* check what model platform we are running on */ 230 switch ((i >> 16) & 0xFF) { 231 #ifdef DS3100 232 case 1: /* DS3100 Pmax */ 233 /* 234 * Find out how much memory is available. 235 */ 236 physmem = btoc(v - KERNBASE); 237 cp = (char *)MACH_PHYS_TO_UNCACHED(physmem << PGSHIFT); 238 while (cp < (char *)MACH_MAX_MEM_ADDR) { 239 if (badaddr(cp, 4)) 240 break; 241 cp += NBPG; 242 physmem++; 243 } 244 break; 245 #endif 246 247 #ifdef DS5000 248 case 2: /* DS5000 3max */ 249 { 250 extern void tc_find_all_options(); 251 252 /* disable all TURBOchannel interrupts */ 253 i = *(volatile int *)MACH_SYS_CSR_ADDR; 254 *(volatile int *)MACH_SYS_CSR_ADDR = i & ~(MACH_CSR_MBZ | 0xFF); 255 256 /* 257 * Probe the TURBOchannel to see what controllers are present. 258 */ 259 tc_find_all_options(); 260 261 /* clear any memory errors from probes */ 262 *(unsigned *)MACH_ERROR_ADDR = 0; 263 264 /* 265 * Find out how much memory is available. 266 */ 267 physmem = btoc(v - KERNBASE); 268 cp = (char *)MACH_PHYS_TO_UNCACHED(physmem << PGSHIFT); 269 while (cp < (char *)MACH_MAX_MEM_ADDR) { 270 if (badaddr(cp, 4)) 271 break; 272 *(int *)cp = 0xa5a5a5a5; 273 /* 274 * Data will persist on the bus if we read it right 275 * away. Have to be tricky here. 276 */ 277 ((int *)cp)[4] = 0x5a5a5a5a; 278 MachEmptyWriteBuffer(); 279 if (*(int *)cp != 0xa5a5a5a5) 280 break; 281 cp += NBPG; 282 physmem++; 283 } 284 break; 285 } 286 #endif DS5000 287 288 case 5: /* DS5800 Isis */ 289 case 6: /* DS5400 MIPSfair */ 290 default: 291 printf("kernel not configured for systype 0x%x\n", i); 292 boot(RB_HALT | RB_NOSYNC); 293 } 294 295 maxmem = physmem; 296 297 /* 298 * Initialize error message buffer (at end of core). 299 */ 300 maxmem -= btoc(sizeof (struct msgbuf)); 301 msgbufp = (struct msgbuf *)(MACH_PHYS_TO_CACHED(maxmem << PGSHIFT)); 302 msgbufmapped = 1; 303 304 /* 305 * Allocate space for system data structures. 306 * The first available kernel virtual address is in "v". 307 * As pages of kernel virtual memory are allocated, "v" is incremented. 308 * 309 * These data structures are allocated here instead of cpu_startup() 310 * because physical memory is directly addressable. We don't have 311 * to map these into virtual address space. 312 */ 313 start = v; 314 315 #define valloc(name, type, num) \ 316 (name) = (type *)v; v = (caddr_t)((name)+(num)) 317 #define valloclim(name, type, num, lim) \ 318 (name) = (type *)v; v = (caddr_t)((lim) = ((name)+(num))) 319 valloc(cfree, struct cblock, nclist); 320 valloc(callout, struct callout, ncallout); 321 valloc(swapmap, struct map, nswapmap = maxproc * 2); 322 #ifdef SYSVSHM 323 valloc(shmsegs, struct shmid_ds, shminfo.shmmni); 324 #endif 325 #ifdef ATTR 326 /* this is allocated here just to save a few bytes */ 327 valloc(pmap_attributes, char, physmem); 328 #endif 329 330 /* 331 * Determine how many buffers to allocate. 332 * We allocate more buffer space than the BSD standard of 333 * using 10% of memory for the first 2 Meg, 5% of remaining. 334 * We just allocate a flat 10%. Insure a minimum of 16 buffers. 335 * We allocate 1/2 as many swap buffer headers as file i/o buffers. 336 */ 337 if (bufpages == 0) 338 bufpages = physmem / 10 / CLSIZE; 339 if (nbuf == 0) { 340 nbuf = bufpages; 341 if (nbuf < 16) 342 nbuf = 16; 343 } 344 if (nswbuf == 0) { 345 nswbuf = (nbuf / 2) &~ 1; /* force even */ 346 if (nswbuf > 256) 347 nswbuf = 256; /* sanity */ 348 } 349 valloc(swbuf, struct buf, nswbuf); 350 valloc(buf, struct buf, nbuf); 351 352 /* 353 * Clear allocated memory. 354 */ 355 v = (caddr_t)pmax_round_page(v); 356 bzero(start, v - start); 357 358 /* 359 * Initialize the virtual memory system. 360 */ 361 pmap_bootstrap((vm_offset_t)MACH_CACHED_TO_PHYS(v)); 362 } 363 364 /* 365 * Console initialization: called early on from main, 366 * before vm init or startup. Do enough configuration 367 * to choose and initialize a console. 368 * XXX need something better here. 369 */ 370 consinit() 371 { 372 373 #include "pm.h" 374 #if NPM > 0 375 if (pminit()) 376 return; 377 #endif 378 379 #include "cfb.h" 380 #if NCFB > 0 381 { 382 register struct pmax_ctlr *cp; 383 register struct driver *drp; 384 385 for (cp = pmax_cinit; drp = cp->pmax_driver; cp++) { 386 if (strcmp(drp->d_name, "cfb")) 387 continue; 388 if (cfb_init(cp)) 389 return; 390 } 391 } 392 #endif 393 } 394 395 /* 396 * cpu_startup: allocate memory for variable-sized tables, 397 * initialize cpu, and do autoconfiguration. 398 */ 399 cpu_startup() 400 { 401 register unsigned i; 402 register caddr_t v; 403 int base, residual; 404 extern long Usrptsize; 405 extern struct map *useriomap; 406 #ifdef DEBUG 407 extern int pmapdebug; 408 int opmapdebug = pmapdebug; 409 #endif 410 vm_offset_t minaddr, maxaddr; 411 vm_size_t size; 412 413 #ifdef DEBUG 414 pmapdebug = 0; 415 #endif 416 417 /* 418 * Good {morning,afternoon,evening,night}. 419 */ 420 printf(version); 421 printf("real mem = %d\n", ctob(physmem)); 422 423 /* 424 * Allocate virtual address space for file I/O buffers. 425 * Note they are different than the array of headers, 'buf', 426 * and usually occupy more virtual memory than physical. 427 */ 428 size = MAXBSIZE * nbuf; 429 buffer_map = kmem_suballoc(kernel_map, (vm_offset_t)&buffers, 430 &maxaddr, size, FALSE); 431 minaddr = (vm_offset_t)buffers; 432 if (vm_map_find(buffer_map, vm_object_allocate(size), (vm_offset_t)0, 433 &minaddr, size, FALSE) != KERN_SUCCESS) 434 panic("startup: cannot allocate buffers"); 435 base = bufpages / nbuf; 436 residual = bufpages % nbuf; 437 for (i = 0; i < nbuf; i++) { 438 vm_size_t curbufsize; 439 vm_offset_t curbuf; 440 441 /* 442 * First <residual> buffers get (base+1) physical pages 443 * allocated for them. The rest get (base) physical pages. 444 * 445 * The rest of each buffer occupies virtual space, 446 * but has no physical memory allocated for it. 447 */ 448 curbuf = (vm_offset_t)buffers + i * MAXBSIZE; 449 curbufsize = CLBYTES * (i < residual ? base+1 : base); 450 vm_map_pageable(buffer_map, curbuf, curbuf+curbufsize, FALSE); 451 vm_map_simplify(buffer_map, curbuf); 452 } 453 /* 454 * Allocate a submap for exec arguments. This map effectively 455 * limits the number of processes exec'ing at any time. 456 */ 457 exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 458 16*NCARGS, TRUE); 459 /* 460 * Allocate a submap for physio 461 */ 462 phys_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 463 VM_PHYS_SIZE, TRUE); 464 465 /* 466 * Finally, allocate mbuf pool. Since mclrefcnt is an off-size 467 * we use the more space efficient malloc in place of kmem_alloc. 468 */ 469 mclrefcnt = (char *)malloc(NMBCLUSTERS+CLBYTES/MCLBYTES, 470 M_MBUF, M_NOWAIT); 471 bzero(mclrefcnt, NMBCLUSTERS+CLBYTES/MCLBYTES); 472 mb_map = kmem_suballoc(kernel_map, (vm_offset_t)&mbutl, &maxaddr, 473 VM_MBUF_SIZE, FALSE); 474 /* 475 * Initialize callouts 476 */ 477 callfree = callout; 478 for (i = 1; i < ncallout; i++) 479 callout[i-1].c_next = &callout[i]; 480 481 #ifdef DEBUG 482 pmapdebug = opmapdebug; 483 #endif 484 printf("avail mem = %d\n", ptoa(cnt.v_free_count)); 485 printf("using %d buffers containing %d bytes of memory\n", 486 nbuf, bufpages * CLBYTES); 487 /* 488 * Set up CPU-specific registers, cache, etc. 489 */ 490 initcpu(); 491 492 /* 493 * Set up buffers, so they can be used to read disk labels. 494 */ 495 bufinit(); 496 497 /* 498 * Configure the system. 499 */ 500 configure(); 501 } 502 503 /* 504 * Set registers on exec. 505 * Clear all registers except sp, pc. 506 */ 507 setregs(p, entry, retval) 508 register struct proc *p; 509 u_long entry; 510 int retval[2]; 511 { 512 int sp = p->p_md.md_regs[SP]; 513 extern struct proc *machFPCurProcPtr; 514 515 bzero((caddr_t)p->p_md.md_regs, (FSR + 1) * sizeof(int)); 516 p->p_md.md_regs[SP] = sp; 517 p->p_md.md_regs[PC] = entry; 518 p->p_md.md_regs[PS] = PSL_USERSET; 519 p->p_md.md_flags & ~MDP_FPUSED; 520 if (machFPCurProcPtr == p) 521 machFPCurProcPtr = (struct proc *)0; 522 } 523 524 /* 525 * WARNING: code in locore.s assumes the layout shown for sf_signum 526 * thru sf_handler so... don't screw with them! 527 */ 528 struct sigframe { 529 int sf_signum; /* signo for handler */ 530 int sf_code; /* additional info for handler */ 531 struct sigcontext *sf_scp; /* context ptr for handler */ 532 sig_t sf_handler; /* handler addr for u_sigc */ 533 }; 534 535 #ifdef DEBUG 536 int sigdebug = 0; 537 int sigpid = 0; 538 #define SDB_FOLLOW 0x01 539 #define SDB_KSTACK 0x02 540 #define SDB_FPSTATE 0x04 541 #endif 542 543 /* 544 * Send an interrupt to process. 545 */ 546 void 547 sendsig(catcher, sig, mask, code) 548 sig_t catcher; 549 int sig, mask; 550 unsigned code; 551 { 552 register struct proc *p = curproc; 553 register struct sigframe *fp; 554 register struct sigacts *ps = p->p_sigacts; 555 register struct sigcontext *scp; 556 register int *regs; 557 int oonstack, fsize; 558 struct sigcontext ksc; 559 560 regs = p->p_md.md_regs; 561 oonstack = ps->ps_onstack; 562 /* 563 * Allocate and validate space for the signal handler 564 * context. Note that if the stack is in data space, the 565 * call to grow() is a nop, and the copyout() 566 * will fail if the process has not already allocated 567 * the space with a `brk'. 568 */ 569 if (!ps->ps_onstack && (ps->ps_sigonstack & sigmask(sig))) { 570 scp = (struct sigcontext *)ps->ps_sigsp - 1; 571 ps->ps_onstack = 1; 572 } else 573 scp = (struct sigcontext *)regs[SP] - 1; 574 fp = (struct sigframe *)scp - 1; 575 if ((unsigned)fp <= USRSTACK - ctob(p->p_vmspace->vm_ssize)) 576 (void)grow(p, (unsigned)fp); 577 /* 578 * Build the signal context to be used by sigreturn. 579 */ 580 ksc.sc_onstack = oonstack; 581 ksc.sc_mask = mask; 582 ksc.sc_pc = regs[PC]; 583 ksc.sc_regs[ZERO] = 0xACEDBADE; /* magic number */ 584 bcopy((caddr_t)®s[1], (caddr_t)&ksc.sc_regs[1], 585 sizeof(ksc.sc_regs) - sizeof(int)); 586 ksc.sc_fpused = p->p_md.md_flags & MDP_FPUSED; 587 if (ksc.sc_fpused) { 588 extern struct proc *machFPCurProcPtr; 589 590 /* if FPU has current state, save it first */ 591 if (p == machFPCurProcPtr) 592 MachSaveCurFPState(p); 593 bcopy((caddr_t)&p->p_md.md_regs[F0], (caddr_t)ksc.sc_fpregs, 594 sizeof(ksc.sc_fpregs)); 595 } 596 if (copyout((caddr_t)&ksc, (caddr_t)scp, sizeof(ksc))) { 597 /* 598 * Process has trashed its stack; give it an illegal 599 * instruction to halt it in its tracks. 600 */ 601 SIGACTION(p, SIGILL) = SIG_DFL; 602 sig = sigmask(SIGILL); 603 p->p_sigignore &= ~sig; 604 p->p_sigcatch &= ~sig; 605 p->p_sigmask &= ~sig; 606 psignal(p, SIGILL); 607 return; 608 } 609 /* 610 * Build the argument list for the signal handler. 611 */ 612 regs[A0] = sig; 613 regs[A1] = code; 614 regs[A2] = (int)scp; 615 regs[A3] = (int)catcher; 616 617 regs[PC] = (int)catcher; 618 regs[SP] = (int)fp; 619 regs[RA] = KERNBASE; /* this causes a trap which we interpret as 620 * meaning "do a sigreturn". */ 621 #ifdef DEBUG 622 if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid) 623 printf("sendsig(%d): sig %d ssp %x usp %x scp %x\n", 624 p->p_pid, sig, &oonstack, fp, fp->sf_scp); 625 #endif 626 } 627 628 /* 629 * System call to cleanup state after a signal 630 * has been taken. Reset signal mask and 631 * stack state from context left by sendsig (above). 632 * Return to previous pc and psl as specified by 633 * context left by sendsig. Check carefully to 634 * make sure that the user has not modified the 635 * psl to gain improper priviledges or to cause 636 * a machine fault. 637 */ 638 /* ARGSUSED */ 639 sigreturn(p, uap, retval) 640 struct proc *p; 641 struct args { 642 struct sigcontext *sigcntxp; 643 } *uap; 644 int *retval; 645 { 646 register struct sigcontext *scp; 647 register int *regs; 648 struct sigcontext ksc; 649 int error; 650 651 register struct frame *frame; 652 register int rf; 653 struct sigcontext tsigc; 654 int flags; 655 656 scp = uap->sigcntxp; 657 #ifdef DEBUG 658 if (sigdebug & SDB_FOLLOW) 659 printf("sigreturn: pid %d, scp %x\n", p->p_pid, scp); 660 #endif 661 regs = p->p_md.md_regs; 662 /* 663 * Test and fetch the context structure. 664 * We grab it all at once for speed. 665 */ 666 error = copyin((caddr_t)scp, (caddr_t)&ksc, sizeof(ksc)); 667 if (error != 0 || ksc.sc_regs[ZERO] != 0xACEDBADE || 668 (unsigned)ksc.sc_regs[SP] < (unsigned)regs[SP]) { 669 #ifdef DEBUG 670 if (!(sigdebug & SDB_FOLLOW)) 671 printf("sigreturn: pid %d, scp %x\n", p->p_pid, scp); 672 printf(" old sp %x ra %x pc %x\n", 673 regs[SP], regs[RA], regs[PC]); 674 printf(" new sp %x ra %x pc %x err %d z %x\n", 675 ksc.sc_regs[SP], ksc.sc_regs[RA], ksc.sc_regs[PC], 676 error, ksc.sc_regs[ZERO]); 677 #endif 678 if (regs[PC] == KERNBASE) { 679 int sig; 680 681 /* 682 * Process has trashed its stack; give it an illegal 683 * instruction to halt it in its tracks. 684 */ 685 SIGACTION(p, SIGILL) = SIG_DFL; 686 sig = sigmask(SIGILL); 687 p->p_sigignore &= ~sig; 688 p->p_sigcatch &= ~sig; 689 p->p_sigmask &= ~sig; 690 psignal(p, SIGILL); 691 } 692 return (EINVAL); 693 } 694 /* 695 * Restore the user supplied information 696 */ 697 p->p_sigacts->ps_onstack = scp->sc_onstack & 01; 698 p->p_sigmask = scp->sc_mask &~ sigcantmask; 699 regs[PC] = ksc.sc_pc; 700 bcopy((caddr_t)&ksc.sc_regs[1], (caddr_t)®s[1], 701 sizeof(ksc.sc_regs) - sizeof(int)); 702 ksc.sc_fpused = p->p_md.md_flags & MDP_FPUSED; 703 if (ksc.sc_fpused) 704 bcopy((caddr_t)ksc.sc_fpregs, (caddr_t)&p->p_md.md_regs[F0], 705 sizeof(ksc.sc_fpregs)); 706 return (EJUSTRETURN); 707 } 708 709 int waittime = -1; 710 711 boot(howto) 712 register int howto; 713 { 714 715 /* take a snap shot before clobbering any registers */ 716 if (curproc) 717 savectx(curproc->p_addr, 0); 718 719 howto |= RB_HALT; /* XXX */ 720 boothowto = howto; 721 if ((howto&RB_NOSYNC) == 0 && waittime < 0 && bfreelist[0].b_forw) { 722 register struct buf *bp; 723 int iter, nbusy; 724 725 waittime = 0; 726 (void) spl0(); 727 printf("syncing disks... "); 728 /* 729 * Release vnodes held by texts before sync. 730 */ 731 if (panicstr == 0) 732 vnode_pager_umount(NULL); 733 #ifdef notdef 734 #include "fd.h" 735 #if NFD > 0 736 fdshutdown(); 737 #endif 738 #endif 739 sync(&proc0, (void *)NULL, (int *)NULL); 740 741 for (iter = 0; iter < 20; iter++) { 742 nbusy = 0; 743 for (bp = &buf[nbuf]; --bp >= buf; ) 744 if ((bp->b_flags & (B_BUSY|B_INVAL)) == B_BUSY) 745 nbusy++; 746 if (nbusy == 0) 747 break; 748 printf("%d ", nbusy); 749 DELAY(40000 * iter); 750 } 751 if (nbusy) 752 printf("giving up\n"); 753 else 754 printf("done\n"); 755 /* 756 * If we've been adjusting the clock, the todr 757 * will be out of synch; adjust it now. 758 */ 759 resettodr(); 760 } 761 (void) splhigh(); /* extreme priority */ 762 if (howto & RB_HALT) { 763 void (*f)() = (void (*)())MACH_MON_REINIT; 764 765 (*f)(); /* jump back to prom monitor */ 766 } else { 767 void (*f)() = (void (*)())MACH_MON_AUTOBOOT; 768 769 if (howto & RB_DUMP) 770 dumpsys(); 771 (*f)(); /* jump back to prom monitor and do 'auto' cmd */ 772 /*NOTREACHED*/ 773 } 774 /*NOTREACHED*/ 775 } 776 777 int dumpmag = 0x8fca0101; /* magic number for savecore */ 778 int dumpsize = 0; /* also for savecore */ 779 long dumplo = 0; 780 781 dumpconf() 782 { 783 int nblks; 784 785 dumpsize = physmem; 786 if (dumpdev != NODEV && bdevsw[major(dumpdev)].d_psize) { 787 nblks = (*bdevsw[major(dumpdev)].d_psize)(dumpdev); 788 if (dumpsize > btoc(dbtob(nblks - dumplo))) 789 dumpsize = btoc(dbtob(nblks - dumplo)); 790 else if (dumplo == 0) 791 dumplo = nblks - btodb(ctob(physmem)); 792 } 793 /* 794 * Don't dump on the first CLBYTES (why CLBYTES?) 795 * in case the dump device includes a disk label. 796 */ 797 if (dumplo < btodb(CLBYTES)) 798 dumplo = btodb(CLBYTES); 799 } 800 801 /* 802 * Doadump comes here after turning off memory management and 803 * getting on the dump stack, either when called above, or by 804 * the auto-restart code. 805 */ 806 dumpsys() 807 { 808 int error; 809 810 msgbufmapped = 0; 811 if (dumpdev == NODEV) 812 return; 813 /* 814 * For dumps during autoconfiguration, 815 * if dump device has already configured... 816 */ 817 if (dumpsize == 0) 818 dumpconf(); 819 if (dumplo < 0) 820 return; 821 printf("\ndumping to dev %x, offset %d\n", dumpdev, dumplo); 822 printf("dump "); 823 switch (error = (*bdevsw[major(dumpdev)].d_dump)(dumpdev)) { 824 825 case ENXIO: 826 printf("device bad\n"); 827 break; 828 829 case EFAULT: 830 printf("device not ready\n"); 831 break; 832 833 case EINVAL: 834 printf("area improper\n"); 835 break; 836 837 case EIO: 838 printf("i/o error\n"); 839 break; 840 841 default: 842 printf("error %d\n", error); 843 break; 844 845 case 0: 846 printf("succeeded\n"); 847 } 848 } 849 850 /* 851 * Return the best possible estimate of the time in the timeval 852 * to which tvp points. Unfortunately, we can't read the hardware registers. 853 * We guarantee that the time will be greater than the value obtained by a 854 * previous call. 855 */ 856 microtime(tvp) 857 register struct timeval *tvp; 858 { 859 int s = splclock(); 860 static struct timeval lasttime; 861 862 *tvp = time; 863 #ifdef notdef 864 tvp->tv_usec += clkread(); 865 while (tvp->tv_usec > 1000000) { 866 tvp->tv_sec++; 867 tvp->tv_usec -= 1000000; 868 } 869 #endif 870 if (tvp->tv_sec == lasttime.tv_sec && 871 tvp->tv_usec <= lasttime.tv_usec && 872 (tvp->tv_usec = lasttime.tv_usec + 1) > 1000000) { 873 tvp->tv_sec++; 874 tvp->tv_usec -= 1000000; 875 } 876 lasttime = *tvp; 877 splx(s); 878 } 879 880 initcpu() 881 { 882 register volatile struct chiptime *c; 883 int i; 884 885 /* disable clock interrupts (until startrtclock()) */ 886 c = (volatile struct chiptime *)MACH_CLOCK_ADDR; 887 c->regb = REGB_DATA_MODE | REGB_HOURS_FORMAT; 888 i = c->regc; 889 spl0(); /* safe to turn interrupts on now */ 890 return (i); 891 } 892 893 /* 894 * Convert an ASCII string into an integer. 895 */ 896 int 897 atoi(s) 898 char *s; 899 { 900 int c; 901 unsigned base = 10, d; 902 int neg = 0, val = 0; 903 904 if (s == 0 || (c = *s++) == 0) 905 goto out; 906 907 /* skip spaces if any */ 908 while (c == ' ' || c == '\t') 909 c = *s++; 910 911 /* parse sign, allow more than one (compat) */ 912 while (c == '-') { 913 neg = !neg; 914 c = *s++; 915 } 916 917 /* parse base specification, if any */ 918 if (c == '0') { 919 c = *s++; 920 switch (c) { 921 case 'X': 922 case 'x': 923 base = 16; 924 break; 925 case 'B': 926 case 'b': 927 base = 2; 928 break; 929 default: 930 base = 8; 931 break; 932 } 933 } 934 935 /* parse number proper */ 936 for (;;) { 937 if (c >= '0' && c <= '9') 938 d = c - '0'; 939 else if (c >= 'a' && c <= 'z') 940 d = c - 'a' + 10; 941 else if (c >= 'A' && c <= 'Z') 942 d = c - 'A' + 10; 943 else 944 break; 945 val *= base; 946 val += d; 947 c = *s++; 948 } 949 if (neg) 950 val = -val; 951 out: 952 return val; 953 } 954 955 #ifdef DS5000 956 /* 957 * Mach Operating System 958 * Copyright (c) 1991,1990,1989 Carnegie Mellon University 959 * All Rights Reserved. 960 * 961 * Permission to use, copy, modify and distribute this software and its 962 * documentation is hereby granted, provided that both the copyright 963 * notice and this permission notice appear in all copies of the 964 * software, derivative works or modified versions, and any portions 965 * thereof, and that both notices appear in supporting documentation. 966 * 967 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS 968 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 969 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 970 * 971 * Carnegie Mellon requests users of this software to return to 972 * 973 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 974 * School of Computer Science 975 * Carnegie Mellon University 976 * Pittsburgh PA 15213-3890 977 * 978 * any improvements or extensions that they make and grant Carnegie the 979 * rights to redistribute these changes. 980 */ 981 982 #include "turbochannel.h" 983 984 /* 985 * Driver map: associates a device driver to an option type. 986 * Drivers name are (arbitrarily) defined in each driver and 987 * used in the various config tables. 988 */ 989 struct drivers_map { 990 char module_name[TC_ROM_LLEN]; /* from ROM, literally! */ 991 char *driver_name; /* in bus_??_init[] tables */ 992 } tc_drivers_map[] = { 993 { "KN02 ", "dc"}, /* system board, serial I/O */ 994 { "PMAD-AA ", "le"}, /* Ether */ 995 { "PMAZ-AA ", "asc"}, /* SCSI */ 996 { "PMAG-BA ", "cfb"}, /* Color Frame Buffer */ 997 { "PMAG-CA ", "ga"}, /* 2D graphic board */ 998 { "PMAG-DA ", "gq"}, /* 3D graphic board (LM) */ 999 { "PMAG-FA ", "gq"}, /* 3D graphic board (HE) */ 1000 1001 { "", 0} /* list end */ 1002 }; 1003 1004 #ifdef DEBUG 1005 int tc_verbose = 0; 1006 #endif 1007 1008 /* 1009 * TURBOchannel autoconf procedure. Finds in one sweep what is 1010 * hanging on the bus and fills in the tc_slot_info array. 1011 * This is only the first part of the autoconf scheme, at this 1012 * time we are basically only looking for a graphics board and 1013 * serial port to use as system console (all workstations). 1014 * 1015 * XXX Someday make number of slots dynamic too. 1016 */ 1017 1018 #define KN02_TC_NSLOTS 8 1019 1020 tc_option_t tc_slot_info[KN02_TC_NSLOTS]; 1021 1022 caddr_t tc_slot_virt_addr[] = { 1023 (caddr_t)0xbe000000, /* TURBOchannel, slot 0 */ 1024 (caddr_t)0xbe400000, /* TURBOchannel, slot 1 */ 1025 (caddr_t)0xbe800000, /* TURBOchannel, slot 2 */ 1026 (caddr_t)0xbec00000, /* TURBOchannel, slot 3 */ 1027 (caddr_t)0xbf000000, /* TURBOchannel, slot 4 */ 1028 (caddr_t)0xbf400000, /* TURBOchannel, slot 5 */ 1029 (caddr_t)0xbf800000, /* TURBOchannel, slot 6 */ 1030 /* (caddr_t)0xbfc00000, TURBOchannel, slot 7 */ 1031 }; 1032 1033 void 1034 tc_find_all_options() 1035 { 1036 register int i; 1037 caddr_t addr; 1038 register tc_option_t *sl; 1039 register struct drivers_map *map; 1040 register struct pmax_ctlr *cp; 1041 register struct driver *drp; 1042 1043 /* 1044 * Look for all controllers on the bus. 1045 */ 1046 i = sizeof(tc_slot_virt_addr) / sizeof(tc_slot_virt_addr[0]) - 1; 1047 while (i >= 0) { 1048 addr = tc_slot_virt_addr[i]; 1049 if (tc_probe_slot(addr, &tc_slot_info[i])) { 1050 /* 1051 * Found a slot, make a note of it 1052 */ 1053 tc_slot_info[i].present = 1; 1054 tc_slot_info[i].module_address = addr; 1055 } 1056 1057 i -= tc_slot_info[i].slot_size; 1058 } 1059 1060 /* 1061 * Now for each slot found, see if we have a device driver that 1062 * handles it. 1063 */ 1064 for (i = 0, sl = tc_slot_info; i < KN02_TC_NSLOTS; i++, sl++) { 1065 if (!sl->present) 1066 continue; 1067 /* 1068 * Look for mapping between the module name and 1069 * the device driver name. 1070 */ 1071 for (map = tc_drivers_map; map->driver_name; map++) { 1072 if (bcmp(sl->module_name, map->module_name, TC_ROM_LLEN)) 1073 continue; 1074 goto fnd_map; 1075 } 1076 if (tc_verbose) 1077 printf("Cannot associate a device driver to %s\n", 1078 sl->module_name); 1079 sl->present = 0; 1080 continue; 1081 1082 /* 1083 * Find the device driver entry and fill in the address. 1084 */ 1085 fnd_map: 1086 for (cp = pmax_cinit; drp = cp->pmax_driver; cp++) { 1087 if (strcmp(drp->d_name, map->driver_name)) 1088 continue; 1089 if (cp->pmax_addr == (char *)QUES) { 1090 cp->pmax_addr = sl->module_address; 1091 cp->pmax_pri = i; 1092 continue; 1093 } 1094 if (cp->pmax_addr != sl->module_address) { 1095 cp->pmax_addr = (char *)QUES; 1096 printf("%s: device not at configued address (expected at %x, found at %x)\n", 1097 drp->d_name, 1098 cp->pmax_addr, sl->module_address); 1099 } 1100 } 1101 } 1102 } 1103 1104 /* 1105 * Probe a slot in the TURBOchannel. Return TRUE if a valid option 1106 * is present, FALSE otherwise. A side-effect is to fill the slot 1107 * descriptor with the size of the option, whether it is 1108 * recognized or not. 1109 */ 1110 int 1111 tc_probe_slot(addr, slot) 1112 caddr_t addr; 1113 tc_option_t *slot; 1114 { 1115 int i; 1116 static unsigned tc_offset_rom[] = { 1117 TC_OFF_PROTO_ROM, TC_OFF_ROM 1118 }; 1119 #define TC_N_OFFSETS sizeof(tc_offset_rom)/sizeof(unsigned) 1120 1121 slot->slot_size = 1; 1122 1123 for (i = 0; i < TC_N_OFFSETS; i++) { 1124 if (badaddr(addr + tc_offset_rom[i], 4)) 1125 continue; 1126 /* complain only on last chance */ 1127 if (tc_identify_option((tc_rommap_t *)(addr + tc_offset_rom[i]), 1128 slot, i == (TC_N_OFFSETS-1))) 1129 return (1); 1130 } 1131 return (0); 1132 #undef TC_N_OFFSETS 1133 } 1134 1135 /* 1136 * Identify an option on the TURBOchannel. Looks at the mandatory 1137 * info in the option's ROM and checks it. 1138 */ 1139 int 1140 tc_identify_option(addr, slot, complain) 1141 tc_rommap_t *addr; 1142 tc_option_t *slot; 1143 int complain; 1144 { 1145 register int i; 1146 unsigned char width; 1147 char firmwr[TC_ROM_LLEN+1]; 1148 char vendor[TC_ROM_LLEN+1]; 1149 char module[TC_ROM_LLEN+1]; 1150 char host_type[TC_ROM_SLEN+1]; 1151 1152 /* 1153 * We do not really use the 'width' info, but take advantage 1154 * of the restriction that the spec impose on the portion 1155 * of the ROM that maps between +0x3e0 and +0x470, which 1156 * is the only piece we need to look at. 1157 */ 1158 width = addr->rom_width.value; 1159 switch (width) { 1160 case 1: 1161 case 2: 1162 case 4: 1163 break; 1164 1165 default: 1166 if (complain) 1167 printf("Invalid ROM width (0x%x) at x%x\n", 1168 width, addr); 1169 return (0); 1170 } 1171 1172 if (addr->rom_stride.value != 4) { 1173 if (complain) 1174 printf("Invalid ROM stride (0x%x) at x%x\n", 1175 addr->rom_stride.value, addr); 1176 return (0); 1177 } 1178 1179 if (addr->test_data[0] != 0x55 || 1180 addr->test_data[4] != 0x00 || 1181 addr->test_data[8] != 0xaa || 1182 addr->test_data[12] != 0xff) { 1183 if (complain) 1184 printf("Test pattern failed, option at x%x\n", 1185 addr); 1186 return (0); 1187 } 1188 1189 for (i = 0; i < TC_ROM_LLEN; i++) { 1190 firmwr[i] = addr->firmware_rev[i].value; 1191 vendor[i] = addr->vendor_name[i].value; 1192 module[i] = addr->module_name[i].value; 1193 if (i >= TC_ROM_SLEN) 1194 continue; 1195 host_type[i] = addr->host_firmware_type[i].value; 1196 } 1197 1198 if (tc_verbose) { 1199 firmwr[TC_ROM_LLEN] = '\0'; 1200 vendor[TC_ROM_LLEN] = '\0'; 1201 module[TC_ROM_LLEN] = '\0'; 1202 host_type[TC_ROM_SLEN] = '\0'; 1203 printf("%s %s '%s' at x%x\n %s %s %s '%s'\n %s %d %s %d %s\n", 1204 "Found a", vendor, module, addr, 1205 "Firmware rev.", firmwr, 1206 "diagnostics for a", host_type, 1207 "ROM size is", addr->rom_size.value << 3, 1208 "Kbytes, uses", addr->slot_size.value, "TC slot(s)"); 1209 } 1210 1211 bcopy(module, slot->module_name, TC_ROM_LLEN); 1212 bcopy(vendor, slot->module_id, TC_ROM_LLEN); 1213 bcopy(firmwr, &slot->module_id[TC_ROM_LLEN], TC_ROM_LLEN); 1214 slot->slot_size = addr->slot_size.value; 1215 slot->rom_width = width; 1216 1217 return (1); 1218 } 1219 1220 /* 1221 * Enable/Disable interrupts for a TURBOchannel slot. 1222 */ 1223 tc_enable_interrupt(slotno, on) 1224 register int slotno; 1225 int on; 1226 { 1227 register volatile int *p_csr = (volatile int *)MACH_SYS_CSR_ADDR; 1228 int csr; 1229 int s; 1230 1231 slotno = 1 << (slotno + MACH_CSR_IOINTEN_SHIFT); 1232 s = Mach_spl0(); 1233 csr = *p_csr & ~(MACH_CSR_MBZ | 0xFF); 1234 if (on) 1235 *p_csr = csr | slotno; 1236 else 1237 *p_csr = csr & ~slotno; 1238 splx(s); 1239 } 1240 1241 #endif /* DS5000 */ 1242