ofwoea_machdep.c revision 1.55
1 /* $NetBSD: ofwoea_machdep.c,v 1.55 2021/02/27 01:22:18 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tim Rightnour 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: ofwoea_machdep.c,v 1.55 2021/02/27 01:22:18 thorpej Exp $"); 34 35 #include "ksyms.h" 36 #include "wsdisplay.h" 37 38 #ifdef _KERNEL_OPT 39 #include "opt_ddb.h" 40 #include "opt_kgdb.h" 41 #include "opt_modular.h" 42 #include "opt_multiprocessor.h" 43 #include "opt_oea.h" 44 #include "opt_ofwoea.h" 45 #include "opt_ppcarch.h" 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/buf.h> 50 #include <sys/boot_flag.h> 51 #include <sys/extent.h> 52 #include <sys/kernel.h> 53 #include <sys/ksyms.h> 54 #include <uvm/uvm_extern.h> 55 56 #include <dev/ofw/openfirm.h> 57 #include <dev/wscons/wsconsio.h> 58 #include <dev/wscons/wsdisplayvar.h> 59 #include <dev/rasops/rasops.h> 60 #include <dev/wscons/wsdisplay_vconsvar.h> 61 #include <machine/pmap.h> 62 #include <machine/powerpc.h> 63 #include <machine/trap.h> 64 #include <machine/vmparam.h> 65 #include <machine/autoconf.h> 66 #include <sys/bus.h> 67 #include <powerpc/oea/bat.h> 68 #include <powerpc/oea/ofw_rasconsvar.h> 69 #include <powerpc/oea/cpufeat.h> 70 #include <powerpc/include/oea/spr.h> 71 #include <powerpc/ofw_cons.h> 72 #include <powerpc/ofw_machdep.h> 73 #include <powerpc/spr.h> 74 #include <powerpc/pic/picvar.h> 75 76 #ifdef DDB 77 #include <machine/db_machdep.h> 78 #include <ddb/db_extern.h> 79 #endif 80 81 #ifdef KGDB 82 #include <sys/kgdb.h> 83 #endif 84 85 #ifdef ofppc 86 extern struct model_data modeldata; 87 #endif 88 89 #ifdef OFWOEA_DEBUG 90 #define DPRINTF printf 91 #else 92 #define DPRINTF while (0) printf 93 #endif 94 95 typedef struct _rangemap { 96 u_int32_t addr; 97 u_int32_t size; 98 int type; 99 } rangemap_t; 100 101 struct OF_translation ofw_translations[OFW_MAX_TRANSLATIONS]; 102 103 /* 104 * Data structures holding OpenFirmware's translations when running 105 * in virtual-mode. 106 * 107 * When we call into OpenFirmware, we point the calling CPU's 108 * cpu_info::ci_battable at ofw_battable[]. For now, this table 109 * is empty, which will ensure that any DSI exceptions that occur 110 * during the firmware call will not erroneously load kernel BAT 111 * mappings that could clobber the firmware's translations. 112 */ 113 struct pmap ofw_pmap; 114 struct bat ofw_battable[BAT_VA2IDX(0xffffffff)+1]; 115 116 char bootpath[256]; 117 char model_name[64]; 118 #if NKSYMS || defined(DDB) || defined(MODULAR) 119 void *startsym, *endsym; 120 #endif 121 122 #if PPC_OEA601 123 #define TIMEBASE_FREQ (1000000000) /* RTC register */ 124 #endif 125 126 #ifdef TIMEBASE_FREQ 127 u_int timebase_freq = TIMEBASE_FREQ; 128 #else 129 u_int timebase_freq = 0; 130 #endif 131 132 int ofw_quiesce; 133 134 extern int ofwmsr; 135 extern uint32_t ticks_per_sec; 136 extern uint32_t ns_per_tick; 137 extern uint32_t ticks_per_intr; 138 139 static void restore_ofmap(void); 140 static void set_timebase(void); 141 142 extern void cpu_spinstart(u_int); 143 extern volatile u_int cpu_spinstart_ack; 144 145 void 146 ofwoea_initppc(u_int startkernel, u_int endkernel, char *args) 147 { 148 int node, l; 149 register_t scratch; 150 151 #if defined(MULTIPROCESSOR) && defined(ofppc) 152 char cpupath[32]; 153 int i; 154 #endif 155 156 /* initialze bats */ 157 if ((oeacpufeat & OEACPU_NOBAT) == 0) 158 ofwoea_batinit(); 159 160 #if NKSYMS || defined(DDB) || defined(MODULAR) 161 /* get info of kernel symbol table from bootloader */ 162 memcpy(&startsym, args + strlen(args) + 1, sizeof(startsym)); 163 memcpy(&endsym, args + strlen(args) + 1 + sizeof(startsym), 164 sizeof(endsym)); 165 if (startsym == NULL || endsym == NULL) 166 startsym = endsym = NULL; 167 #endif 168 169 /* get model name and perform model-specific actions */ 170 memset(model_name, 0, sizeof(model_name)); 171 node = OF_finddevice("/"); 172 if (node != -1) { 173 l = OF_getprop(node, "model", model_name, sizeof(model_name)); 174 if (l == -1) 175 OF_getprop(node, "name", model_name, 176 sizeof(model_name)); 177 model_init(); 178 } 179 180 if (strncmp(model_name, "PowerMac11,2", 12) == 0 || 181 strncmp(model_name, "PowerMac12,1", 12) == 0) 182 ofw_quiesce = 1; 183 184 /* switch CPUs to full speed */ 185 if (strncmp(model_name, "PowerMac7,", 10) == 0) { 186 int clock_ih = OF_open("/u3/i2c/i2c-hwclock"); 187 if (clock_ih != 0) { 188 OF_call_method_1("slew-high", clock_ih, 0); 189 } 190 } 191 192 /* Initialize bus_space */ 193 ofwoea_bus_space_init(); 194 195 ofwoea_consinit(); 196 197 if (ofw_quiesce) 198 OF_quiesce(); 199 200 #if defined(MULTIPROCESSOR) && defined(ofppc) 201 for (i=1; i < CPU_MAXNUM; i++) { 202 snprintf(cpupath, sizeof(cpupath), "/cpus/@%x", i); 203 node = OF_finddevice(cpupath); 204 if (node <= 0) 205 continue; 206 aprint_verbose("Starting up CPU %d %s\n", i, cpupath); 207 OF_start_cpu(node, (u_int)cpu_spinstart, i); 208 for (l=0; l < 100000000; l++) { 209 if (cpu_spinstart_ack == i) { 210 aprint_verbose("CPU %d spun up.\n", i); 211 break; 212 } 213 __asm volatile ("sync"); 214 } 215 } 216 #endif 217 218 /* Parse the args string */ 219 if (args) { 220 strcpy(bootpath, args); 221 args = bootpath; 222 while (*++args && *args != ' '); 223 if (*args) { 224 *args++ = 0; 225 while (*args) 226 BOOT_FLAG(*args++, boothowto); 227 } 228 } else { 229 int chs = OF_finddevice("/chosen"); 230 int len; 231 232 len = OF_getprop(chs, "bootpath", bootpath, sizeof(bootpath) - 1); 233 if (len > -1) 234 bootpath[len] = 0; 235 } 236 237 oea_init(pic_ext_intr); 238 239 /* 240 * Now that we've installed our own exception vectors, 241 * ensure that exceptions that happen while running 242 * firmware code fall into ours. 243 */ 244 ofwmsr &= ~PSL_IP; 245 246 uvm_md_init(); 247 248 pmap_bootstrap(startkernel, endkernel); 249 250 /* as far as I can tell, the pmap_setup_seg0 stuff is horribly broken */ 251 #if defined(PPC_OEA64) || defined (PPC_OEA64_BRIDGE) 252 #if defined (PMAC_G5) 253 /* Mapin 1st 256MB segment 1:1, also map in mem needed to access OFW*/ 254 if (oeacpufeat & OEACPU_64_BRIDGE) { 255 vaddr_t va; 256 paddr_t pa; 257 vsize_t size; 258 int i; 259 260 pmap_setup_segment0_map(0, msgbuf_paddr, msgbuf_paddr, 261 round_page(MSGBUFSIZE), 0x0); 262 263 /* Map OFW code+data */ 264 265 for (i = 0; i < __arraycount(ofw_translations); i++) { 266 va = ofw_translations[i].virt; 267 size = ofw_translations[i].size; 268 pa = ofw_translations[i].phys; 269 /* XXX mode */ 270 271 if (size == 0) { 272 /* No more, all done! */ 273 break; 274 } 275 276 if (va < 0xff800000) 277 continue; 278 279 280 for (; va < (ofw_translations[i].virt + size); 281 va += PAGE_SIZE, pa += PAGE_SIZE) { 282 pmap_enter(pmap_kernel(), va, pa, VM_PROT_ALL, 283 VM_PROT_ALL | PMAP_WIRED); 284 } 285 } 286 287 #if NWSDISPLAY > 0 288 /* Map video frame buffer */ 289 290 struct rasops_info *ri = &rascons_console_screen.scr_ri; 291 292 if (ri->ri_bits != NULL) { 293 for (va = (vaddr_t) ri->ri_bits; 294 va < round_page((vaddr_t) ri->ri_bits + 295 ri->ri_height * ri->ri_stride); 296 va += PAGE_SIZE) { 297 pmap_enter(pmap_kernel(), va, va, 298 VM_PROT_READ | VM_PROT_WRITE, 299 PMAP_NOCACHE | PMAP_WIRED); 300 } 301 } 302 #endif 303 } 304 #elif defined (MAMBO) 305 /* Mapin 1st 256MB segment 1:1, also map in mem needed to access OFW*/ 306 if (oeacpufeat & OEACPU_64_BRIDGE) 307 pmap_setup_segment0_map(0, 0xf4000000, 0xf4000000, 0x1000, 0x0); 308 #endif /* PMAC_G5 */ 309 #endif /* PPC_OEA64 || PPC_OEA64_BRIDGE */ 310 311 /* Now enable translation (and machine checks/recoverable interrupts) */ 312 __asm __volatile ("sync; mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" 313 : "=r"(scratch) 314 : "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI)); 315 316 restore_ofmap(); 317 318 rascons_finalize(); 319 320 #if NKSYMS || defined(DDB) || defined(MODULAR) 321 ksyms_addsyms_elf((int)((uintptr_t)endsym - (uintptr_t)startsym), startsym, endsym); 322 #endif 323 324 /* CPU clock stuff */ 325 set_timebase(); 326 327 #ifdef DDB 328 if (boothowto & RB_KDB) 329 Debugger(); 330 #endif 331 } 332 333 void 334 set_timebase(void) 335 { 336 int qhandle, phandle, msr, scratch, node; 337 char type[32]; 338 339 if (timebase_freq != 0) { 340 ticks_per_sec = timebase_freq; 341 goto found; 342 } 343 344 node = OF_finddevice("/cpus/@0"); 345 if (node != -1 && 346 OF_getprop(node, "timebase-frequency", &ticks_per_sec, 347 sizeof ticks_per_sec) > 0) { 348 goto found; 349 } 350 351 node = OF_finddevice("/"); 352 for (qhandle = node; qhandle; qhandle = phandle) { 353 if (OF_getprop(qhandle, "device_type", type, sizeof type) > 0 354 && strcmp(type, "cpu") == 0 355 && OF_getprop(qhandle, "timebase-frequency", 356 &ticks_per_sec, sizeof ticks_per_sec) > 0) { 357 goto found; 358 } 359 if ((phandle = OF_child(qhandle))) 360 continue; 361 while (qhandle) { 362 if ((phandle = OF_peer(qhandle))) 363 break; 364 qhandle = OF_parent(qhandle); 365 } 366 } 367 panic("no cpu node"); 368 369 found: 370 __asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" 371 : "=r"(msr), "=r"(scratch) : "K"((u_short)~PSL_EE)); 372 ns_per_tick = 1000000000 / ticks_per_sec; 373 ticks_per_intr = ticks_per_sec / hz; 374 cpu_timebase = ticks_per_sec; 375 376 #ifdef PPC_OEA601 377 if ((mfpvr() >> 16) == MPC601) 378 curcpu()->ci_lasttb = rtc_nanosecs(); 379 else 380 #endif 381 curcpu()->ci_lasttb = mftbl(); 382 383 mtspr(SPR_DEC, ticks_per_intr); 384 mtmsr(msr); 385 } 386 387 void 388 restore_ofmap(void) 389 { 390 vaddr_t va, size; 391 paddr_t pa; 392 int i; 393 394 pmap_pinit(&ofw_pmap); 395 396 #ifndef _LP64 397 ofw_pmap.pm_sr[0] = KERNELN_SEGMENT(0)|SR_PRKEY; 398 ofw_pmap.pm_sr[KERNEL_SR] = KERNEL_SEGMENT|SR_SUKEY|SR_PRKEY; 399 400 #ifdef KERNEL2_SR 401 ofw_pmap.pm_sr[KERNEL2_SR] = KERNEL2_SEGMENT|SR_SUKEY|SR_PRKEY; 402 #endif 403 #endif 404 405 for (i = 0; i < __arraycount(ofw_translations); i++) { 406 va = ofw_translations[i].virt; 407 size = ofw_translations[i].size; 408 pa = ofw_translations[i].phys; 409 /* XXX mode */ 410 411 if (size == 0) { 412 /* No more, all done! */ 413 break; 414 } 415 416 if (va < 0xf0000000) /* XXX */ 417 continue; 418 419 while (size > 0) { 420 pmap_enter(&ofw_pmap, va, pa, VM_PROT_ALL, 421 VM_PROT_ALL|PMAP_WIRED); 422 pa += PAGE_SIZE; 423 va += PAGE_SIZE; 424 size -= PAGE_SIZE; 425 } 426 } 427 pmap_update(&ofw_pmap); 428 } 429 430 431 432 /* 433 * Scan the device tree for ranges, and return them as bitmap 0..15 434 */ 435 #if !defined(macppc) && defined(PPC_OEA) 436 static u_int16_t 437 ranges_bitmap(int node, u_int16_t bitmap) 438 { 439 int child, mlen, acells, scells, reclen, i, j; 440 u_int32_t addr, len, map[160]; 441 442 for (child = OF_child(node); child; child = OF_peer(child)) { 443 mlen = OF_getprop(child, "ranges", map, sizeof(map)); 444 if (mlen == -1) 445 goto noranges; 446 447 j = OF_getprop(child, "#address-cells", &acells, 448 sizeof(acells)); 449 if (j == -1) 450 goto noranges; 451 452 j = OF_getprop(child, "#size-cells", &scells, 453 sizeof(scells)); 454 if (j == -1) 455 goto noranges; 456 457 #ifdef ofppc 458 reclen = acells + modeldata.ranges_offset + scells; 459 #else 460 reclen = acells + 1 + scells; 461 #endif 462 463 for (i=0; i < (mlen/4)/reclen; i++) { 464 addr = map[reclen * i + acells]; 465 len = map[reclen * i + reclen - 1]; 466 for (j = 0; j < len / 0x10000000; j++) 467 bitmap |= 1 << ((addr+j*0x10000000) >>28); 468 bitmap |= 1 << (addr >> 28); 469 } 470 noranges: 471 bitmap |= ranges_bitmap(child, bitmap); 472 continue; 473 } 474 return bitmap; 475 } 476 #endif /* !macppc && PPC_OEA */ 477 478 void 479 ofwoea_batinit(void) 480 { 481 #if defined (PPC_OEA) 482 483 #ifdef macppc 484 /* 485 * cover PCI and register space but not the firmware ROM 486 */ 487 #ifdef PPC_OEA601 488 489 /* 490 * use segment registers for the 601 491 */ 492 if ((mfpvr() >> 16 ) == MPC601) 493 oea_batinit( 494 0x80000000, BAT_BL_256M, 495 0x90000000, BAT_BL_256M, 496 0xa0000000, BAT_BL_256M, 497 0xb0000000, BAT_BL_256M, 498 0xf0000000, BAT_BL_256M, 499 0); 500 else 501 #endif /* PPC_OEA601 */ 502 /* 503 * map to bats 504 */ 505 oea_batinit(0x80000000, BAT_BL_1G, 506 0xf0000000, BAT_BL_128M, 507 0xf8000000, BAT_BL_64M, 508 0xfe000000, BAT_BL_8M, /* Grackle IO */ 509 0); 510 #else /* ! macppc */ 511 uint16_t bitmap; 512 int node, i; 513 514 node = OF_finddevice("/"); 515 516 bitmap = ranges_bitmap(node, 0); 517 oea_batinit(0); 518 519 for (i=1; i < 0x10; i++) { 520 /* skip the three vital SR regions */ 521 if (i == USER_SR || i == KERNEL_SR || i == KERNEL2_SR) 522 continue; 523 if (bitmap & (1 << i)) { 524 oea_iobat_add(0x10000000 * i, BAT_BL_256M); 525 DPRINTF("Batmapped 256M at 0x%x\n", 0x10000000 * i); 526 } 527 } 528 #endif /* macppc */ 529 #endif /* OEA */ 530 } 531 532 533 /* we define these partially, as we will fill the rest in later */ 534 struct powerpc_bus_space genppc_isa_io_space_tag = { 535 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE, 536 .pbs_base = 0x00000000, 537 }; 538 539 struct powerpc_bus_space genppc_isa_mem_space_tag = { 540 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE, 541 .pbs_base = 0x00000000, 542 }; 543 544 /* This gives us a maximum of 6 PCI busses, assuming both io/mem on each. 545 * Increase if necc. 546 */ 547 static char ex_storage[EXSTORAGE_MAX][EXTENT_FIXED_STORAGE_SIZE(EXTMAP_RANGES)] 548 __attribute__((aligned(8))); 549 550 551 static void 552 find_ranges(int base, rangemap_t *regions, int *cur, int type) 553 { 554 int node, i, len, reclen; 555 u_int32_t parent_acells, acells, scells, map[160]; 556 char tmp[32]; 557 558 node = base; 559 if (OF_getprop(node, "device_type", tmp, sizeof(tmp)) == -1) 560 goto rec; 561 if ((type == RANGE_TYPE_PCI || type == RANGE_TYPE_FIRSTPCI) && 562 strcmp("pci", tmp) != 0) 563 goto rec; 564 if (type == RANGE_TYPE_ISA && strcmp("isa", tmp) != 0) 565 goto rec; 566 if (type == RANGE_TYPE_MACIO && strcmp("memory-controller", tmp) == 0) { 567 len = OF_getprop(node, "reg", map, sizeof(map)); 568 acells = 1; 569 scells = 1; 570 } else { 571 len = OF_getprop(node, "ranges", map, sizeof(map)); 572 } 573 if (len == -1) 574 goto rec; 575 if (OF_getprop(OF_parent(node), "#address-cells", &parent_acells, 576 sizeof(parent_acells)) != sizeof(parent_acells)) 577 parent_acells = 1; 578 if (OF_getprop(node, "#address-cells", &acells, 579 sizeof(acells)) != sizeof(acells)) 580 acells = 3; 581 if (OF_getprop(node, "#size-cells", &scells, 582 sizeof(scells)) != sizeof(scells)) 583 scells = 2; 584 #ifdef ofppc 585 if (modeldata.ranges_offset == 0) 586 scells -= 1; 587 #endif 588 if (type == RANGE_TYPE_ISA) 589 reclen = 6; 590 else 591 reclen = parent_acells + acells + scells; 592 /* 593 * There exist ISA buses with empty ranges properties. This is 594 * known to occur on the Pegasos II machine, and likely others. 595 * According to them, that means that the isa bus is a fake bus, and 596 * the real maps are the PCI maps of the preceeding bus. To deal 597 * with this, we will set cur to -1 and return. 598 */ 599 if (type == RANGE_TYPE_ISA && strcmp("isa", tmp) == 0 && len == 0) { 600 *cur = -1; 601 DPRINTF("Found empty range in isa bus\n"); 602 return; 603 } 604 605 DPRINTF("found a map reclen=%d cur=%d len=%d\n", reclen, *cur, len); 606 switch (type) { 607 case RANGE_TYPE_PCI: 608 case RANGE_TYPE_FIRSTPCI: 609 for (i=0; i < len/(4*reclen); i++) { 610 DPRINTF("FOUND PCI RANGE\n"); 611 regions[*cur].size = 612 map[i*reclen + parent_acells + acells + scells - 1]; 613 /* skip ranges of size==0 */ 614 if (regions[*cur].size == 0) 615 continue; 616 regions[*cur].type = (map[i*reclen] >> 24) & 0x3; 617 regions[*cur].addr = map[i*reclen + parent_acells + acells - 1]; 618 (*cur)++; 619 } 620 break; 621 case RANGE_TYPE_ISA: 622 for (i=0; i < len/(4*reclen); i++) { 623 if (map[i*reclen] == 1) 624 regions[*cur].type = RANGE_IO; 625 else 626 regions[*cur].type = RANGE_MEM; 627 DPRINTF("FOUND ISA RANGE TYPE=%d\n", 628 regions[*cur].type); 629 regions[*cur].size = 630 map[i*reclen + acells + scells]; 631 (*cur)++; 632 } 633 break; 634 case RANGE_TYPE_MACIO: 635 regions[*cur].type = RANGE_MEM; 636 if (len == 8) { 637 regions[*cur].size = map[1]; 638 regions[*cur].addr = map[0]; 639 } else { 640 regions[*cur].size = map[2]; 641 regions[*cur].addr = map[1]; 642 } 643 (*cur)++; 644 break; 645 } 646 DPRINTF("returning with CUR=%d\n", *cur); 647 return; 648 rec: 649 for (node = OF_child(base); node; node = OF_peer(node)) { 650 DPRINTF("RECURSE 1 STEP\n"); 651 find_ranges(node, regions, cur, type); 652 if (*cur == -1) 653 return; 654 } 655 } 656 657 static int 658 find_lowest_range(rangemap_t *ranges, int nrof, int type) 659 { 660 int i, low = 0; 661 u_int32_t addr = 0xffffffff; 662 663 for (i=0; i < nrof; i++) { 664 if (ranges[i].type == type && ranges[i].addr != 0 && 665 ranges[i].addr < addr) { 666 low = i; 667 addr = ranges[i].addr; 668 } 669 } 670 if (addr == 0xffffffff) 671 return -1; 672 return low; 673 } 674 675 /* 676 * Find a region of memory, and create a bus_space_tag for it. 677 * Notes: 678 * For ISA node is ignored. 679 * node is the starting node. if -1, we start at / and map everything. 680 */ 681 682 int 683 ofwoea_map_space(int rangetype, int iomem, int node, 684 struct powerpc_bus_space *tag, const char *name) 685 { 686 int i, cur, range, nrofholes, error; 687 static int exmap=0; 688 rangemap_t region, holes[32], list[32]; 689 690 memset(list, 0, sizeof(list)); 691 memset(®ion, 0, sizeof(region)); 692 cur = 0; 693 if (rangetype == RANGE_TYPE_ISA || node == -1) 694 node = OF_finddevice("/"); 695 if (rangetype == RANGE_TYPE_ISA) { 696 u_int32_t size = 0; 697 rangemap_t regions[32]; 698 699 DPRINTF("LOOKING FOR FIRSTPCI\n"); 700 find_ranges(node, list, &cur, RANGE_TYPE_FIRSTPCI); 701 range = 0; 702 DPRINTF("LOOKING FOR ISA\n"); 703 find_ranges(node, regions, &range, RANGE_TYPE_ISA); 704 if (range == 0 || cur == 0) 705 return -1; /* no isa stuff found */ 706 /* 707 * This may be confusing to some. The ISA ranges property 708 * is supposed to be a set of IO ranges for the ISA bus, but 709 * generally, it's just a set of pci devfunc lists that tell 710 * you to go look at the parent PCI device for the actual 711 * ranges. 712 */ 713 if (range == -1) { 714 /* we found a rangeless isa bus */ 715 if (iomem == RANGE_IO) 716 size = 0x10000; 717 else 718 size = 0x1000000; 719 } 720 DPRINTF("found isa stuff\n"); 721 for (i=0; i < range; i++) 722 if (regions[i].type == iomem) 723 size = regions[i].size; 724 if (iomem == RANGE_IO) { 725 /* the first io range is the one */ 726 for (i=0; i < cur; i++) 727 if (list[i].type == RANGE_IO && size) { 728 DPRINTF("found IO\n"); 729 tag->pbs_offset = list[i].addr; 730 tag->pbs_limit = size; 731 error = bus_space_init(tag, name, 732 ex_storage[exmap], 733 sizeof(ex_storage[exmap])); 734 exmap++; 735 return error; 736 } 737 } else { 738 for (i=0; i < cur; i++) 739 if (list[i].type == RANGE_MEM && 740 list[i].size == size) { 741 DPRINTF("found mem\n"); 742 tag->pbs_offset = list[i].addr; 743 tag->pbs_limit = size; 744 error = bus_space_init(tag, name, 745 ex_storage[exmap], 746 sizeof(ex_storage[exmap])); 747 exmap++; 748 return error; 749 } 750 } 751 return -1; /* NO ISA FOUND */ 752 } 753 find_ranges(node, list, &cur, rangetype); 754 755 DPRINTF("cur == %d\n", cur); 756 /* now list should contain a list of memory regions */ 757 for (i=0; i < cur; i++) 758 DPRINTF("addr=0x%x size=0x%x type=%d\n", list[i].addr, 759 list[i].size, list[i].type); 760 761 range = find_lowest_range(list, cur, iomem); 762 i = 0; 763 nrofholes = 0; 764 while (range != -1) { 765 DPRINTF("range==%d\n", range); 766 DPRINTF("i==%d\n", i); 767 if (i == 0) { 768 memcpy(®ion, &list[range], sizeof(rangemap_t)); 769 list[range].addr = 0; 770 i++; 771 range = find_lowest_range(list, cur, iomem); 772 continue; 773 } 774 if (region.addr + region.size < list[range].addr) { 775 /* allocate a hole */ 776 holes[nrofholes].type = iomem; 777 holes[nrofholes].addr = region.size + region.addr; 778 holes[nrofholes].size = list[range].addr - 779 holes[nrofholes].addr - 1; 780 nrofholes++; 781 } 782 region.size = list[range].size + list[range].addr - 783 region.addr; 784 list[range].addr = 0; 785 range = find_lowest_range(list, cur, iomem); 786 } 787 DPRINTF("RANGE iomem=%d FOUND\n", iomem); 788 DPRINTF("addr=0x%x size=0x%x type=%d\n", region.addr, 789 region.size, region.type); 790 DPRINTF("HOLES FOUND\n"); 791 for (i=0; i < nrofholes; i++) 792 DPRINTF("addr=0x%x size=0x%x type=%d\n", holes[i].addr, 793 holes[i].size, holes[i].type); 794 /* AT THIS POINT WE MAP IT */ 795 796 if ((rangetype == RANGE_TYPE_PCI) || (rangetype == RANGE_TYPE_MACIO)) { 797 if (exmap == EXSTORAGE_MAX) 798 panic("Not enough ex_storage space. " 799 "Increase EXSTORAGE_MAX"); 800 801 /* XXX doing this in here might be wrong */ 802 if (iomem == 1) { 803 /* we map an IO region */ 804 tag->pbs_offset = region.addr; 805 tag->pbs_base = 0; 806 tag->pbs_limit = region.size; 807 } else { 808 /* ... or a memory region */ 809 tag->pbs_offset = 0; 810 tag->pbs_base = region.addr; 811 tag->pbs_limit = region.size + region.addr; 812 } 813 814 error = bus_space_init(tag, name, ex_storage[exmap], 815 sizeof(ex_storage[exmap])); 816 exmap++; 817 if (error) 818 panic("ofwoea_bus_space_init: can't init tag %s", name); 819 for (i=0; i < nrofholes; i++) { 820 if (holes[i].type == RANGE_IO) { 821 error = extent_alloc_region(tag->pbs_extent, 822 holes[i].addr - tag->pbs_offset, 823 holes[i].size, EX_NOWAIT); 824 } else { 825 error = extent_alloc_region(tag->pbs_extent, 826 holes[i].addr, holes[i].size, EX_NOWAIT); 827 } 828 if (error) 829 panic("ofwoea_bus_space_init: can't block out" 830 " reserved space 0x%x-0x%x: error=%d", 831 holes[i].addr, holes[i].addr+holes[i].size, 832 error); 833 } 834 return error; 835 } 836 return -1; 837 } 838 839 void 840 ofwoea_bus_space_init(void) 841 { 842 int error; 843 844 error = ofwoea_map_space(RANGE_TYPE_ISA, RANGE_IO, -1, 845 &genppc_isa_io_space_tag, "isa-ioport"); 846 if (error > 0) 847 panic("Could not map ISA IO"); 848 849 error = ofwoea_map_space(RANGE_TYPE_ISA, RANGE_MEM, -1, 850 &genppc_isa_mem_space_tag, "isa-iomem"); 851 if (error > 0) 852 panic("Could not map ISA MEM"); 853 } 854
Indexes created Tue Sep 30 17:09:57 GMT 2025