1 /* autoconf.c 4.34 82/03/31 */ 2 3 /* 4 * Setup the system to run on the current machine. 5 * 6 * Configure() is called at boot time and initializes the uba and mba 7 * device tables and the memory controller monitoring. Available 8 * devices are determined (from possibilities mentioned in ioconf.c), 9 * and the drivers are initialized. 10 * 11 * N.B.: A lot of the conditionals based on processor type say 12 * #if VAX780 13 * and 14 * #if VAX750 15 * which may be incorrect after more processors are introduced if they 16 * are like either of these machines. 17 * 18 * TODO: 19 * use pcpu info about whether a ubasr exists 20 */ 21 22 #include "mba.h" 23 24 #include "../h/param.h" 25 #include "../h/systm.h" 26 #include "../h/map.h" 27 #include "../h/nexus.h" 28 #include "../h/pte.h" 29 #include "../h/buf.h" 30 #include "../h/mbareg.h" 31 #include "../h/mbavar.h" 32 #include "../h/dk.h" 33 #include "../h/vm.h" 34 #include "../h/ubareg.h" 35 #include "../h/ubavar.h" 36 #include "../h/mtpr.h" 37 #include "../h/cpu.h" 38 #include "../h/scb.h" 39 #include "../h/mem.h" 40 41 /* 42 * The following several variables are related to 43 * the configuration process, and are used in initializing 44 * the machine. 45 */ 46 int cold; /* if 1, still working on cold-start */ 47 int nexnum; /* current nexus number */ 48 int dkn; /* number of iostat dk numbers assigned so far */ 49 50 /* 51 * Addresses of the (locore) routines which bootstrap us from 52 * hardware traps to C code. Filled into the system control block 53 * as necessary. 54 */ 55 #if NMBA > 0 56 int (*mbaintv[4])() = { Xmba0int, Xmba1int, Xmba2int, Xmba3int }; 57 #endif 58 #if VAX780 59 int (*ubaintv[4])() = { Xua0int, Xua1int, Xua2int, Xua3int }; 60 #endif 61 62 /* 63 * This allocates the space for the per-uba information, 64 * such as buffered data path usage. 65 */ 66 struct uba_hd uba_hd[MAXNUBA]; 67 68 /* 69 * Determine mass storage and memory configuration for a machine. 70 * Get cpu type, and then switch out to machine specific procedures 71 * which will probe adaptors to see what is out there. 72 */ 73 configure() 74 { 75 union cpusid cpusid; 76 register struct percpu *ocp; 77 register int *ip; 78 extern char Sysbase[]; 79 80 cpusid.cpusid = mfpr(SID); 81 for (ocp = percpu; ocp->pc_cputype; ocp++) 82 if (ocp->pc_cputype == cpusid.cpuany.cp_type) { 83 probenexus(ocp); 84 /* 85 * Write protect the scb. It is strange 86 * that this code is here, but this is as soon 87 * as we are done mucking with it, and the 88 * write-enable was done in assembly language 89 * to which we will never return. 90 */ 91 ip = (int *)Sysmap; *ip &= ~PG_PROT; *ip |= PG_KR; 92 mtpr(TBIS, Sysbase); 93 #if GENERIC 94 setconf(); 95 #endif 96 cold = 0; 97 memenable(); 98 return; 99 } 100 printf("cpu type %d not configured\n", cpusid.cpuany.cp_type); 101 asm("halt"); 102 } 103 104 /* 105 * Probe nexus space, finding the interconnects 106 * and setting up and probing mba's and uba's for devices. 107 */ 108 /*ARGSUSED*/ 109 probenexus(pcpu) 110 register struct percpu *pcpu; 111 { 112 register struct nexus *nxv; 113 struct nexus *nxp = pcpu->pc_nexbase; 114 union nexcsr nexcsr; 115 int i; 116 117 nexnum = 0, nxv = nexus; 118 for (; nexnum < pcpu->pc_nnexus; nexnum++, nxp++, nxv++) { 119 nxaccess(nxp, Nexmap[nexnum]); 120 if (badaddr((caddr_t)nxv, 4)) 121 continue; 122 if (pcpu->pc_nextype && pcpu->pc_nextype[nexnum] != NEX_ANY) 123 nexcsr.nex_csr = pcpu->pc_nextype[nexnum]; 124 else 125 nexcsr = nxv->nexcsr; 126 if (nexcsr.nex_csr&NEX_APD) 127 continue; 128 switch (nexcsr.nex_type) { 129 130 case NEX_MBA: 131 printf("mba%d at tr%d\n", nummba, nexnum); 132 if (nummba >= NMBA) { 133 printf("%d mba's", nummba); 134 goto unconfig; 135 } 136 #if NMBA > 0 137 mbafind(nxv, nxp); 138 nummba++; 139 #endif 140 break; 141 142 case NEX_UBA0: 143 case NEX_UBA1: 144 case NEX_UBA2: 145 case NEX_UBA3: 146 printf("uba%d at tr%d\n", numuba, nexnum); 147 if (numuba >= 4) { 148 printf("5 uba's"); 149 goto unsupp; 150 } 151 #if VAX780 152 if (cpu == VAX_780) 153 setscbnex(ubaintv[numuba]); 154 #endif 155 i = nexcsr.nex_type - NEX_UBA0; 156 unifind((struct uba_regs *)nxv, (struct uba_regs *)nxp, 157 umem[i], pcpu->pc_umaddr[i], UMEMmap[i]); 158 #if VAX780 159 if (cpu == VAX_780) 160 ((struct uba_regs *)nxv)->uba_cr = 161 UBACR_IFS|UBACR_BRIE| 162 UBACR_USEFIE|UBACR_SUEFIE; 163 #endif 164 numuba++; 165 break; 166 167 case NEX_DR32: 168 /* there can be more than one... are there other codes??? */ 169 printf("dr32"); 170 goto unsupp; 171 172 case NEX_MEM4: 173 case NEX_MEM4I: 174 case NEX_MEM16: 175 case NEX_MEM16I: 176 printf("mcr%d at tr%d\n", nmcr, nexnum); 177 if (nmcr >= 4) { 178 printf("5 mcr's"); 179 goto unsupp; 180 } 181 mcraddr[nmcr++] = (struct mcr *)nxv; 182 break; 183 184 case NEX_MPM0: 185 case NEX_MPM1: 186 case NEX_MPM2: 187 case NEX_MPM3: 188 printf("mpm"); 189 goto unsupp; 190 191 default: 192 printf("nexus type %x", nexcsr.nex_type); 193 unsupp: 194 printf(" unsupported (at tr %d)\n", nexnum); 195 continue; 196 unconfig: 197 printf(" not configured\n"); 198 continue; 199 } 200 } 201 #if VAX780 202 if (cpu == VAX_780) 203 { int ubawatch(); timeout(ubawatch, (caddr_t)0, hz); } 204 #endif 205 } 206 207 #if NMBA > 0 208 struct mba_device *mbaconfig(); 209 /* 210 * Find devices attached to a particular mba 211 * and look for each device found in the massbus 212 * initialization tables. 213 */ 214 mbafind(nxv, nxp) 215 struct nexus *nxv, *nxp; 216 { 217 register struct mba_regs *mdp; 218 register struct mba_drv *mbd; 219 register struct mba_device *mi; 220 register struct mba_slave *ms; 221 int dn, dt; 222 struct mba_device fnd; 223 224 mdp = (struct mba_regs *)nxv; 225 mba_hd[nummba].mh_mba = mdp; 226 mba_hd[nummba].mh_physmba = (struct mba_regs *)nxp; 227 setscbnex(mbaintv[nummba]); 228 fnd.mi_mba = mdp; 229 fnd.mi_mbanum = nummba; 230 for (mbd = mdp->mba_drv, dn = 0; mbd < &mdp->mba_drv[8]; mbd++, dn++) { 231 if ((mbd->mbd_ds&MBDS_DPR) == 0) 232 continue; 233 dt = mbd->mbd_dt & 0xffff; 234 if (dt == 0) 235 continue; 236 if (dt == MBDT_MOH) 237 continue; 238 fnd.mi_drive = dn; 239 if ((mi = mbaconfig(&fnd, dt)) && (dt & MBDT_TAP)) { 240 for (ms = mbsinit; ms->ms_driver; ms++) 241 if (ms->ms_driver == mi->mi_driver && ms->ms_alive == 0 && 242 (ms->ms_ctlr == mi->mi_unit || ms->ms_ctlr=='?')) { 243 if ((*ms->ms_driver->md_slave)(mi, ms)) { 244 printf("%s%d at %s%d slave %d\n", 245 ms->ms_driver->md_sname, 246 ms->ms_unit, 247 mi->mi_driver->md_dname, 248 mi->mi_unit, 249 ms->ms_slave); 250 ms->ms_alive = 1; 251 ms->ms_ctlr = mi->mi_unit; 252 } 253 } 254 } 255 } 256 mdp->mba_cr = MBCR_INIT; 257 mdp->mba_cr = MBCR_IE; 258 } 259 260 /* 261 * Have found a massbus device; 262 * see if it is in the configuration table. 263 * If so, fill in its data. 264 */ 265 struct mba_device * 266 mbaconfig(ni, type) 267 register struct mba_device *ni; 268 register int type; 269 { 270 register struct mba_device *mi; 271 register short *tp; 272 register struct mba_hd *mh; 273 274 for (mi = mbdinit; mi->mi_driver; mi++) { 275 if (mi->mi_alive) 276 continue; 277 tp = mi->mi_driver->md_type; 278 for (mi->mi_type = 0; *tp; tp++, mi->mi_type++) 279 if (*tp == (type&MBDT_TYPE)) 280 goto found; 281 continue; 282 found: 283 #define match(fld) (ni->fld == mi->fld || mi->fld == '?') 284 if (!match(mi_drive) || !match(mi_mbanum)) 285 continue; 286 printf("%s%d at mba%d drive %d", 287 mi->mi_driver->md_dname, mi->mi_unit, 288 ni->mi_mbanum, ni->mi_drive); 289 printf("\n"); 290 mi->mi_alive = 1; 291 mh = &mba_hd[ni->mi_mbanum]; 292 mi->mi_hd = mh; 293 mh->mh_mbip[ni->mi_drive] = mi; 294 mh->mh_ndrive++; 295 mi->mi_mba = ni->mi_mba; 296 mi->mi_drv = &mi->mi_mba->mba_drv[ni->mi_drive]; 297 mi->mi_driver->md_info[mi->mi_unit] = mi; 298 mi->mi_mbanum = ni->mi_mbanum; 299 mi->mi_drive = ni->mi_drive; 300 if (mi->mi_dk && dkn < DK_NDRIVE) 301 mi->mi_dk = dkn++; 302 else 303 mi->mi_dk = -1; 304 (*mi->mi_driver->md_attach)(mi); 305 return (mi); 306 } 307 return (0); 308 } 309 #endif 310 311 /* 312 * Fixctlrmask fixes the masks of the driver ctlr routines 313 * which otherwise save r10 and r11 where the interrupt and br 314 * level are passed through. 315 */ 316 fixctlrmask() 317 { 318 register struct uba_ctlr *um; 319 register struct uba_device *ui; 320 register struct uba_driver *ud; 321 #define phys(a,b) ((b)(((int)(a))&0x7fffffff)) 322 323 for (um = ubminit; ud = phys(um->um_driver, struct uba_driver *); um++) 324 *phys(ud->ud_probe, short *) &= ~0xc00; 325 for (ui = ubdinit; ud = phys(ui->ui_driver, struct uba_driver *); ui++) 326 *phys(ud->ud_probe, short *) &= ~0xc00; 327 } 328 329 /* 330 * Find devices on a UNIBUS. 331 * Uses per-driver routine to set <br,cvec> into <r11,r10>, 332 * and then fills in the tables, with help from a per-driver 333 * slave initialization routine. 334 */ 335 unifind(vubp, pubp, vumem, pumem, memmap) 336 struct uba_regs *vubp, *pubp; 337 caddr_t vumem, pumem; 338 struct pte *memmap; 339 { 340 #ifndef lint 341 register int br, cvec; /* MUST BE r11, r10 */ 342 #else 343 /* 344 * Lint doesn't realize that these 345 * can be initialized asynchronously 346 * when devices interrupt. 347 */ 348 register int br = 0, cvec = 0; 349 #endif 350 register struct uba_device *ui; 351 register struct uba_ctlr *um; 352 u_short *reg, addr; 353 struct uba_hd *uhp; 354 struct uba_driver *udp; 355 int i, (**ivec)(), haveubasr = 0; 356 357 /* 358 * Initialize the UNIBUS, by freeing the map 359 * registers and the buffered data path registers 360 */ 361 uhp = &uba_hd[numuba]; 362 uhp->uh_map = (struct map *)calloc(UAMSIZ * sizeof (struct map)); 363 rminit(uhp->uh_map, NUBMREG, 1, "uba", UAMSIZ); 364 switch (cpu) { 365 #if VAX780 366 case VAX_780: 367 uhp->uh_bdpfree = (1<<NBDP780) - 1; 368 haveubasr = 1; 369 break; 370 #endif 371 #if VAX750 372 case VAX_750: 373 uhp->uh_bdpfree = (1<<NBDP750) - 1; 374 break; 375 #endif 376 #if VAX7ZZ 377 case VAX_7ZZ: 378 break; 379 #endif 380 } 381 382 /* 383 * Save virtual and physical addresses 384 * of adaptor, and allocate and initialize 385 * the UNIBUS interrupt vector. 386 */ 387 uhp->uh_uba = vubp; 388 uhp->uh_physuba = pubp; 389 /* HAVE TO DO SOMETHING SPECIAL FOR SECOND UNIBUS ON COMETS HERE */ 390 if (numuba == 0) 391 uhp->uh_vec = UNIvec; 392 else 393 uhp->uh_vec = (int(**)())calloc(512); 394 for (i = 0; i < 128; i++) 395 uhp->uh_vec[i] = 396 scbentry(&catcher[i*2], SCB_ISTACK); 397 /* 398 * Set last free interrupt vector for devices with 399 * programmable interrupt vectors. Use is to decrement 400 * this number and use result as interrupt vector. 401 */ 402 uhp->uh_lastiv = 0x200; 403 404 /* THIS IS A CHEAT: USING THE FACT THAT UMEM and NEXI ARE SAME SIZE */ 405 nxaccess((struct nexus *)pumem, memmap); 406 #if VAX780 407 if (haveubasr) { 408 vubp->uba_sr = vubp->uba_sr; 409 vubp->uba_cr = UBACR_IFS|UBACR_BRIE; 410 } 411 #endif 412 /* 413 * Map the first page of UNIBUS i/o 414 * space to the first page of memory 415 * for devices which will need to dma 416 * output to produce an interrupt. 417 */ 418 *(int *)(&vubp->uba_map[0]) = UBAMR_MRV; 419 420 #define ubaddr(off) (u_short *)((int)vumem + ((off)&0x1fff)) 421 /* 422 * Check each unibus mass storage controller. 423 * For each one which is potentially on this uba, 424 * see if it is really there, and if it is record it and 425 * then go looking for slaves. 426 */ 427 for (um = ubminit; udp = um->um_driver; um++) { 428 if (um->um_ubanum != numuba && um->um_ubanum != '?') 429 continue; 430 addr = (u_short)um->um_addr; 431 reg = ubaddr(addr); 432 if (badaddr((caddr_t)reg, 2)) 433 continue; 434 #if VAX780 435 if (haveubasr && vubp->uba_sr) { 436 vubp->uba_sr = vubp->uba_sr; 437 continue; 438 } 439 #endif 440 cvec = 0x200; 441 i = (*udp->ud_probe)(reg); 442 #if VAX780 443 if (haveubasr && vubp->uba_sr) { 444 vubp->uba_sr = vubp->uba_sr; 445 continue; 446 } 447 #endif 448 if (i == 0) 449 continue; 450 printf("%s%d at uba%d csr %o ", 451 udp->ud_mname, um->um_ctlr, numuba, addr); 452 if (cvec == 0) { 453 printf("zero vector\n"); 454 continue; 455 } 456 if (cvec == 0x200) { 457 printf("didn't interrupt\n"); 458 continue; 459 } 460 printf("vec %o, ipl %x\n", cvec, br); 461 um->um_alive = 1; 462 um->um_ubanum = numuba; 463 um->um_hd = &uba_hd[numuba]; 464 um->um_addr = (caddr_t)reg; 465 udp->ud_minfo[um->um_ctlr] = um; 466 for (ivec = um->um_intr; *ivec; ivec++) { 467 um->um_hd->uh_vec[cvec/4] = 468 scbentry(*ivec, SCB_ISTACK); 469 cvec += 4; 470 } 471 for (ui = ubdinit; ui->ui_driver; ui++) { 472 if (ui->ui_driver != udp || ui->ui_alive || 473 ui->ui_ctlr != um->um_ctlr && ui->ui_ctlr != '?' || 474 ui->ui_ubanum != numuba && ui->ui_ubanum != '?') 475 continue; 476 if ((*udp->ud_slave)(ui, reg)) { 477 ui->ui_alive = 1; 478 ui->ui_ctlr = um->um_ctlr; 479 ui->ui_ubanum = numuba; 480 ui->ui_hd = &uba_hd[numuba]; 481 ui->ui_addr = (caddr_t)reg; 482 ui->ui_physaddr = pumem + (addr&0x1fff); 483 if (ui->ui_dk && dkn < DK_NDRIVE) 484 ui->ui_dk = dkn++; 485 else 486 ui->ui_dk = -1; 487 ui->ui_mi = um; 488 /* ui_type comes from driver */ 489 udp->ud_dinfo[ui->ui_unit] = ui; 490 printf("%s%d at %s%d slave %d\n", 491 udp->ud_dname, ui->ui_unit, 492 udp->ud_mname, um->um_ctlr, ui->ui_slave); 493 (*udp->ud_attach)(ui); 494 } 495 } 496 } 497 /* 498 * Now look for non-mass storage peripherals. 499 */ 500 for (ui = ubdinit; udp = ui->ui_driver; ui++) { 501 if (ui->ui_ubanum != numuba && ui->ui_ubanum != '?' || 502 ui->ui_alive || ui->ui_slave != -1) 503 continue; 504 addr = (u_short)ui->ui_addr; 505 reg = ubaddr(addr); 506 if (badaddr((caddr_t)reg, 2)) 507 continue; 508 #if VAX780 509 if (haveubasr && vubp->uba_sr) { 510 vubp->uba_sr = vubp->uba_sr; 511 continue; 512 } 513 #endif 514 cvec = 0x200; 515 i = (*udp->ud_probe)(reg, um->um_ctlr); 516 #if VAX780 517 if (haveubasr && vubp->uba_sr) { 518 vubp->uba_sr = vubp->uba_sr; 519 continue; 520 } 521 #endif 522 if (i == 0) 523 continue; 524 printf("%s%d at uba%d csr %o ", 525 ui->ui_driver->ud_dname, ui->ui_unit, numuba, addr); 526 if (cvec == 0) { 527 printf("zero vector\n"); 528 continue; 529 } 530 if (cvec == 0x200) { 531 printf("didn't interrupt\n"); 532 continue; 533 } 534 printf("vec %o, ipl %x\n", cvec, br); 535 ui->ui_hd = &uba_hd[numuba]; 536 for (ivec = ui->ui_intr; *ivec; ivec++) { 537 ui->ui_hd->uh_vec[cvec/4] = 538 scbentry(*ivec, SCB_ISTACK); 539 cvec += 4; 540 } 541 ui->ui_alive = 1; 542 ui->ui_ubanum = numuba; 543 ui->ui_addr = (caddr_t)reg; 544 ui->ui_physaddr = pumem + (addr&0x1fff); 545 ui->ui_dk = -1; 546 /* ui_type comes from driver */ 547 udp->ud_dinfo[ui->ui_unit] = ui; 548 (*udp->ud_attach)(ui); 549 } 550 } 551 552 setscbnex(fn) 553 int (*fn)(); 554 { 555 register struct scb *scbp = &scb; 556 557 scbp->scb_ipl14[nexnum] = scbp->scb_ipl15[nexnum] = 558 scbp->scb_ipl16[nexnum] = scbp->scb_ipl17[nexnum] = 559 scbentry(fn, SCB_ISTACK); 560 } 561 562 /* 563 * Make a nexus accessible at physical address phys 564 * by mapping kernel ptes starting at pte. 565 * 566 * WE LEAVE ALL NEXI MAPPED; THIS IS PERHAPS UNWISE 567 * SINCE MISSING NEXI DONT RESPOND. BUT THEN AGAIN 568 * PRESENT NEXI DONT RESPOND TO ALL OF THEIR ADDRESS SPACE. 569 */ 570 nxaccess(physa, pte) 571 struct nexus *physa; 572 register struct pte *pte; 573 { 574 register int i = btop(sizeof (struct nexus)); 575 register unsigned v = btop(physa); 576 577 do 578 *(int *)pte++ = PG_V|PG_KW|v++; 579 while (--i > 0); 580 mtpr(TBIA, 0); 581 } 582