dec_3min.c revision 1.42
1/* $NetBSD: dec_3min.c,v 1.42 2000/06/06 00:08:25 nisimura Exp $ */ 2 3/* 4 * Copyright (c) 1998 Jonathan Stone. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Jonathan Stone for 17 * the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33/* 34 * Copyright (c) 1988 University of Utah. 35 * Copyright (c) 1992, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * This code is derived from software contributed to Berkeley by 39 * the Systems Programming Group of the University of Utah Computer 40 * Science Department, The Mach Operating System project at 41 * Carnegie-Mellon University and Ralph Campbell. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 72 */ 73 74#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */ 75 76__KERNEL_RCSID(0, "$NetBSD: dec_3min.c,v 1.42 2000/06/06 00:08:25 nisimura Exp $"); 77 78#include <sys/param.h> 79#include <sys/systm.h> 80#include <sys/device.h> 81 82#include <machine/cpu.h> 83#include <machine/intr.h> 84#include <machine/sysconf.h> 85 86#include <mips/mips/mips_mcclock.h> /* mcclock CPUspeed estimation */ 87 88/* all these to get ioasic_base */ 89#include <dev/tc/tcvar.h> /* tc type definitions for.. */ 90#include <dev/tc/ioasicreg.h> /* ioasic interrrupt masks */ 91#include <dev/tc/ioasicvar.h> /* ioasic_base */ 92 93#include <pmax/pmax/machdep.h> 94#include <pmax/pmax/kmin.h> /* 3min baseboard addresses */ 95#include <pmax/pmax/memc.h> /* 3min/maxine memory errors */ 96#include <pmax/tc/sccvar.h> 97 98#include "rasterconsole.h" 99 100void dec_3min_init __P((void)); /* XXX */ 101static void dec_3min_bus_reset __P((void)); 102static void dec_3min_cons_init __P((void)); 103static void dec_3min_intr __P((unsigned, unsigned, unsigned, unsigned)); 104static void dec_3min_intr_establish __P((struct device *, void *, 105 int, int (*)(void *), void *)); 106 107static void kn02ba_wbflush __P((void)); 108static unsigned kn02ba_clkread __P((void)); 109 110 111/* 112 * Local declarations. 113 */ 114static u_int32_t kmin_tc3_imask; 115 116#ifdef MIPS3 117static unsigned latched_cycle_cnt; 118#endif 119 120 121void 122dec_3min_init() 123{ 124 platform.iobus = "tcbus"; 125 platform.bus_reset = dec_3min_bus_reset; 126 platform.cons_init = dec_3min_cons_init; 127 platform.iointr = dec_3min_intr; 128 platform.intr_establish = dec_3min_intr_establish; 129 platform.memsize = memsize_scan; 130 platform.clkread = kn02ba_clkread; 131 132 /* clear any memory errors */ 133 *(u_int32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_TIMEOUT) = 0; 134 kn02ba_wbflush(); 135 136 ioasic_base = MIPS_PHYS_TO_KSEG1(KMIN_SYS_ASIC); 137 138 /* 139 * Since all the motherboard interrupts come through the 140 * IOASIC, it has to be turned off for all the spls and 141 * since we don't know what kinds of devices are in the 142 * TURBOchannel option slots, just splhigh(). 143 */ 144 splvec.splbio = MIPS_SPL_0_1_2_3; 145 splvec.splnet = MIPS_SPL_0_1_2_3; 146 splvec.spltty = MIPS_SPL_0_1_2_3; 147 splvec.splimp = MIPS_SPL_0_1_2_3; 148 splvec.splclock = MIPS_SPL_0_1_2_3; 149 splvec.splstatclock = MIPS_SPL_0_1_2_3; 150 151 /* enable posting of MIPS_INT_MASK_3 to CAUSE register */ 152 *(u_int32_t *)(ioasic_base + IOASIC_IMSK) = KMIN_INTR_CLOCK; 153 /* calibrate cpu_mhz value */ 154 mc_cpuspeed(ioasic_base+IOASIC_SLOT_8_START, MIPS_INT_MASK_3); 155 156 *(u_int32_t *)(ioasic_base + IOASIC_LANCE_DECODE) = 0x3; 157 *(u_int32_t *)(ioasic_base + IOASIC_SCSI_DECODE) = 0xe; 158#if 0 159 *(u_int32_t *)(ioasic_base + IOASIC_SCC0_DECODE) = (0x10|4); 160 *(u_int32_t *)(ioasic_base + IOASIC_SCC1_DECODE) = (0x10|6); 161 *(u_int32_t *)(ioasic_base + IOASIC_CSR) = 0x00000f00; 162#endif 163 164 /* sanitize interrupt mask */ 165 kmin_tc3_imask = (KMIN_INTR_CLOCK|KMIN_INTR_PSWARN|KMIN_INTR_TIMEOUT); 166 *(u_int32_t *)(ioasic_base + IOASIC_INTR) = 0; 167 *(u_int32_t *)(ioasic_base + IOASIC_IMSK) = kmin_tc3_imask; 168 169 /* 170 * The kmin memory hardware seems to wrap memory addresses 171 * with 4Mbyte SIMMs, which causes the physmem computation 172 * to lose. Find out how big the SIMMS are and set 173 * max_ physmem accordingly. 174 * XXX Do MAXINEs lose the same way? 175 */ 176 physmem_boardmax = KMIN_PHYS_MEMORY_END + 1; 177 if ((KMIN_MSR_SIZE_16Mb & *(int *)MIPS_PHYS_TO_KSEG1(KMIN_REG_MSR)) 178 == 0) 179 physmem_boardmax = physmem_boardmax >> 2; 180 physmem_boardmax = MIPS_PHYS_TO_KSEG1(physmem_boardmax); 181 182 sprintf(cpu_model, "DECstation 5000/1%d (3MIN)", cpu_mhz); 183} 184 185/* 186 * Initalize the memory system and I/O buses. 187 */ 188static void 189dec_3min_bus_reset() 190{ 191 192 /* 193 * Reset interrupts, clear any errors from newconf probes 194 */ 195 196 *(u_int32_t *)MIPS_PHYS_TO_KSEG1(KMIN_REG_TIMEOUT) = 0; 197 kn02ba_wbflush(); 198 199 *(u_int32_t *)(ioasic_base + IOASIC_INTR) = 0; 200 kn02ba_wbflush(); 201} 202 203static void 204dec_3min_cons_init() 205{ 206 int kbd, crt, screen; 207 extern int tcfb_cnattach __P((int)); /* XXX */ 208 209 kbd = crt = screen = 0; 210 prom_findcons(&kbd, &crt, &screen); 211 212 if (screen > 0) { 213#if NRASTERCONSOLE > 0 214 if (tcfb_cnattach(crt) > 0) { 215 scc_lk201_cnattach(ioasic_base, 0x180000); 216 return; 217 } 218#endif 219 printf("No framebuffer device configured for slot %d: ", crt); 220 printf("using serial console\n"); 221 } 222 /* 223 * Delay to allow PROM putchars to complete. 224 * FIFO depth * character time, 225 * character time = (1000000 / (defaultrate / 10)) 226 */ 227 DELAY(160000000 / 9600); /* XXX */ 228 229 scc_cnattach(ioasic_base, 0x180000); 230} 231 232static void 233dec_3min_intr_establish(dev, cookie, level, handler, arg) 234 struct device *dev; 235 void *cookie; 236 int level; 237 int (*handler) __P((void *)); 238 void *arg; 239{ 240 unsigned mask; 241 242 switch ((int)cookie) { 243 /* slots 0-2 don't interrupt through the IOASIC. */ 244 case SYS_DEV_OPT0: 245 mask = MIPS_INT_MASK_0; 246 break; 247 case SYS_DEV_OPT1: 248 mask = MIPS_INT_MASK_1; 249 break; 250 case SYS_DEV_OPT2: 251 mask = MIPS_INT_MASK_2; 252 break; 253 254 case SYS_DEV_SCSI: 255 mask = (IOASIC_INTR_SCSI | IOASIC_INTR_SCSI_PTR_LOAD | 256 IOASIC_INTR_SCSI_OVRUN | IOASIC_INTR_SCSI_READ_E); 257 break; 258 case SYS_DEV_LANCE: 259 mask = KMIN_INTR_LANCE; 260 break; 261 case SYS_DEV_SCC0: 262 mask = KMIN_INTR_SCC_0; 263 break; 264 case SYS_DEV_SCC1: 265 mask = KMIN_INTR_SCC_1; 266 break; 267 default: 268#ifdef DIAGNOSTIC 269 printf("warning: enabling unknown intr %x\n", (int)cookie); 270#endif 271 return; 272 } 273 274#if defined(DEBUG) 275 printf("3MIN: imask %x, enabling slot %d, dev %p handler %p\n", 276 kmin_tc3_imask, (int)cookie, dev, handler); 277#endif 278 279 /* 280 * Enable the interrupt handler, and if it's an IOASIC 281 * slot, set the IOASIC interrupt mask. 282 * Otherwise, set the appropriate spl level in the R3000 283 * register. 284 * Be careful to set handlers before enabling, and disable 285 * interrupts before clearing handlers. 286 */ 287 288 /* Set the interrupt handler and argument ... */ 289 intrtab[(int)cookie].ih_func = handler; 290 intrtab[(int)cookie].ih_arg = arg; 291 /* ... and set the relevant mask */ 292 switch ((int)cookie) { 293 case SYS_DEV_OPT0: 294 case SYS_DEV_OPT1: 295 case SYS_DEV_OPT2: 296 /* it's an option slot */ 297 { 298 int s = splhigh(); 299 s |= mask; 300 splx(s); 301 } 302 break; 303 default: 304 /* it's a baseboard device going via the IOASIC */ 305 kmin_tc3_imask |= mask; 306 break; 307 } 308 309 *(u_int32_t *)(ioasic_base + IOASIC_IMSK) = kmin_tc3_imask; 310 kn02ba_wbflush(); 311} 312 313 314#define CHECKINTR(slot, bits) \ 315 do { \ 316 if (can_serve & (bits)) { \ 317 intrcnt[slot] += 1; \ 318 (*intrtab[slot].ih_func)(intrtab[slot].ih_arg); \ 319 } \ 320 } while (0) 321 322static void 323dec_3min_intr(status, cause, pc, ipending) 324 unsigned status; 325 unsigned cause; 326 unsigned pc; 327 unsigned ipending; 328{ 329 static int user_warned = 0; 330 static int intr_depth = 0; 331 u_int32_t old_mask; 332 333 intr_depth++; 334 old_mask = *(u_int32_t *)(ioasic_base + IOASIC_IMSK); 335 336 if (ipending & MIPS_INT_MASK_4) 337 prom_haltbutton(); 338 339 if (ipending & MIPS_INT_MASK_3) { 340 /* NB: status & MIPS_INT_MASK3 must also be set */ 341 /* masked interrupts are still observable */ 342 u_int32_t intr, imsk, can_serve, turnoff; 343 344 turnoff = 0; 345 intr = *(u_int32_t *)(ioasic_base + IOASIC_INTR); 346 imsk = *(u_int32_t *)(ioasic_base + IOASIC_IMSK); 347 can_serve = intr & imsk; 348 349 if (intr & IOASIC_INTR_SCSI_PTR_LOAD) { 350 turnoff |= IOASIC_INTR_SCSI_PTR_LOAD; 351#ifdef notdef 352 asc_dma_intr(); 353#endif 354 } 355 356 if (intr & (IOASIC_INTR_SCSI_OVRUN | IOASIC_INTR_SCSI_READ_E)) 357 turnoff |= IOASIC_INTR_SCSI_OVRUN | IOASIC_INTR_SCSI_READ_E; 358 359 if (intr & IOASIC_INTR_LANCE_READ_E) 360 turnoff |= IOASIC_INTR_LANCE_READ_E; 361 362 if (turnoff) 363 *(u_int32_t *)(ioasic_base + IOASIC_INTR) = ~turnoff; 364 365 if (intr & KMIN_INTR_TIMEOUT) 366 kn02ba_errintr(); 367 368 if (intr & KMIN_INTR_CLOCK) { 369 struct clockframe cf; 370 371 __asm __volatile("lbu $0,48(%0)" :: 372 "r"(ioasic_base + IOASIC_SLOT_8_START)); 373#ifdef MIPS3 374 if (CPUISMIPS3) { 375 latched_cycle_cnt = mips3_cycle_count(); 376 } 377#endif 378 cf.pc = pc; 379 cf.sr = status; 380 hardclock(&cf); 381 intrcnt[HARDCLOCK]++; 382 } 383 384 /* If clock interrups were enabled, re-enable them ASAP. */ 385 if (old_mask & KMIN_INTR_CLOCK) { 386 /* ioctl interrupt mask to splclock and higher */ 387 *(u_int32_t *)(ioasic_base + IOASIC_IMSK) 388 = old_mask & 389 ~(KMIN_INTR_SCC_0|KMIN_INTR_SCC_1 | 390 IOASIC_INTR_LANCE|IOASIC_INTR_SCSI); 391 kn02ba_wbflush(); 392 _splset(MIPS_SR_INT_IE | (status & MIPS_INT_MASK_3)); 393 } 394 395 if (intr_depth > 1) 396 goto done; 397 398 CHECKINTR(SYS_DEV_SCC0, IOASIC_INTR_SCC_0); 399 CHECKINTR(SYS_DEV_SCC1, IOASIC_INTR_SCC_1); 400 401#ifdef notyet /* untested */ 402 /* If tty interrupts were enabled, re-enable them ASAP. */ 403 if ((old_mask & (KMIN_INTR_SCC_1|KMIN_INTR_SCC_0)) == 404 (KMIN_INTR_SCC_1|KMIN_INTR_SCC_0)) { 405 *imaskp = old_mask & 406 ~(KMIN_INTR_SCC_0|KMIN_INTR_SCC_1 | 407 IOASIC_INTR_LANCE|IOASIC_INTR_SCSI); 408 kn02ba_wbflush(); 409 } 410 411 /* XXX until we know about SPLs of TC options. */ 412 if (intr_depth > 1) 413 goto done; 414#endif 415 CHECKINTR(SYS_DEV_LANCE, IOASIC_INTR_LANCE); 416 CHECKINTR(SYS_DEV_SCSI, IOASIC_INTR_SCSI); 417 418 if (user_warned && ((intr & KMIN_INTR_PSWARN) == 0)) { 419 printf("%s\n", "Power supply ok now."); 420 user_warned = 0; 421 } 422 if ((intr & KMIN_INTR_PSWARN) && (user_warned < 3)) { 423 user_warned++; 424 printf("%s\n", "Power supply overheating"); 425 } 426 } 427 if ((ipending & MIPS_INT_MASK_0) && intrtab[SYS_DEV_OPT0].ih_func) { 428 (*intrtab[SYS_DEV_OPT0].ih_func)(intrtab[SYS_DEV_OPT0].ih_arg); 429 intrcnt[SYS_DEV_OPT0]++; 430 } 431 432 if ((ipending & MIPS_INT_MASK_1) && intrtab[SYS_DEV_OPT1].ih_func) { 433 (*intrtab[SYS_DEV_OPT1].ih_func)(intrtab[SYS_DEV_OPT1].ih_arg); 434 intrcnt[SYS_DEV_OPT1]++; 435 } 436 if ((ipending & MIPS_INT_MASK_2) && intrtab[SYS_DEV_OPT2].ih_func) { 437 (*intrtab[SYS_DEV_OPT2].ih_func)(intrtab[SYS_DEV_OPT2].ih_arg); 438 intrcnt[SYS_DEV_OPT2]++; 439 } 440 441done: 442 /* restore entry state */ 443 splhigh(); 444 intr_depth--; 445 *(u_int32_t *)(ioasic_base + IOASIC_IMSK) = old_mask; 446 447 _splset(MIPS_SR_INT_IE | (status & ~cause & MIPS_HARD_INT_MASK)); 448} 449 450 451 452/* 453 ************************************************************************ 454 * Extra functions 455 ************************************************************************ 456 */ 457 458static void 459kn02ba_wbflush() 460{ 461 /* read twice IOASIC_IMSK */ 462 __asm __volatile("lw $0,%0; lw $0,%0" :: 463 "i"(MIPS_PHYS_TO_KSEG1(KMIN_REG_IMSK))); 464} 465 466static unsigned 467kn02ba_clkread() 468{ 469#ifdef MIPS3 470 if (CPUISMIPS3) { 471 u_int32_t mips3_cycles; 472 473 mips3_cycles = mips3_cycle_count() - latched_cycle_cnt; 474 /* XXX divides take 78 cycles: approximate with * 41/2048 */ 475 return((mips3_cycles >> 6) + (mips3_cycles >> 8) + 476 (mips3_cycles >> 11)); 477 } 478#endif 479 return 0; 480} 481