1 /* 2 * Common boot and setup code for both 32-bit and 64-bit. 3 * Extracted from arch/powerpc/kernel/setup_64.c. 4 * 5 * Copyright (C) 2001 PPC64 Team, IBM Corp 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 */ 12 13 #undef DEBUG 14 15 #include <linux/export.h> 16 #include <linux/string.h> 17 #include <linux/sched.h> 18 #include <linux/init.h> 19 #include <linux/kernel.h> 20 #include <linux/reboot.h> 21 #include <linux/delay.h> 22 #include <linux/initrd.h> 23 #include <linux/platform_device.h> 24 #include <linux/seq_file.h> 25 #include <linux/ioport.h> 26 #include <linux/console.h> 27 #include <linux/screen_info.h> 28 #include <linux/root_dev.h> 29 #include <linux/notifier.h> 30 #include <linux/cpu.h> 31 #include <linux/unistd.h> 32 #include <linux/serial.h> 33 #include <linux/serial_8250.h> 34 #include <linux/debugfs.h> 35 #include <linux/percpu.h> 36 #include <linux/memblock.h> 37 #include <linux/of_platform.h> 38 #include <asm/io.h> 39 #include <asm/paca.h> 40 #include <asm/prom.h> 41 #include <asm/processor.h> 42 #include <asm/vdso_datapage.h> 43 #include <asm/pgtable.h> 44 #include <asm/smp.h> 45 #include <asm/elf.h> 46 #include <asm/machdep.h> 47 #include <asm/time.h> 48 #include <asm/cputable.h> 49 #include <asm/sections.h> 50 #include <asm/firmware.h> 51 #include <asm/btext.h> 52 #include <asm/nvram.h> 53 #include <asm/setup.h> 54 #include <asm/rtas.h> 55 #include <asm/iommu.h> 56 #include <asm/serial.h> 57 #include <asm/cache.h> 58 #include <asm/page.h> 59 #include <asm/mmu.h> 60 #include <asm/xmon.h> 61 #include <asm/cputhreads.h> 62 #include <mm/mmu_decl.h> 63 #include <asm/fadump.h> 64 65 #ifdef DEBUG 66 #include <asm/udbg.h> 67 #define DBG(fmt...) udbg_printf(fmt) 68 #else 69 #define DBG(fmt...) 70 #endif 71 72 /* The main machine-dep calls structure 73 */ 74 struct machdep_calls ppc_md; 75 EXPORT_SYMBOL(ppc_md); 76 struct machdep_calls *machine_id; 77 EXPORT_SYMBOL(machine_id); 78 79 int boot_cpuid = -1; 80 EXPORT_SYMBOL_GPL(boot_cpuid); 81 82 unsigned long klimit = (unsigned long) _end; 83 84 /* 85 * This still seems to be needed... -- paulus 86 */ 87 struct screen_info screen_info = { 88 .orig_x = 0, 89 .orig_y = 25, 90 .orig_video_cols = 80, 91 .orig_video_lines = 25, 92 .orig_video_isVGA = 1, 93 .orig_video_points = 16 94 }; 95 #if defined(CONFIG_FB_VGA16_MODULE) 96 EXPORT_SYMBOL(screen_info); 97 #endif 98 99 /* Variables required to store legacy IO irq routing */ 100 int of_i8042_kbd_irq; 101 EXPORT_SYMBOL_GPL(of_i8042_kbd_irq); 102 int of_i8042_aux_irq; 103 EXPORT_SYMBOL_GPL(of_i8042_aux_irq); 104 105 #ifdef __DO_IRQ_CANON 106 /* XXX should go elsewhere eventually */ 107 int ppc_do_canonicalize_irqs; 108 EXPORT_SYMBOL(ppc_do_canonicalize_irqs); 109 #endif 110 111 /* also used by kexec */ 112 void machine_shutdown(void) 113 { 114 #ifdef CONFIG_FA_DUMP 115 /* 116 * if fadump is active, cleanup the fadump registration before we 117 * shutdown. 118 */ 119 fadump_cleanup(); 120 #endif 121 122 if (ppc_md.machine_shutdown) 123 ppc_md.machine_shutdown(); 124 } 125 126 void machine_restart(char *cmd) 127 { 128 machine_shutdown(); 129 if (ppc_md.restart) 130 ppc_md.restart(cmd); 131 smp_send_stop(); 132 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 133 local_irq_disable(); 134 while (1) ; 135 } 136 137 void machine_power_off(void) 138 { 139 machine_shutdown(); 140 if (pm_power_off) 141 pm_power_off(); 142 smp_send_stop(); 143 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 144 local_irq_disable(); 145 while (1) ; 146 } 147 /* Used by the G5 thermal driver */ 148 EXPORT_SYMBOL_GPL(machine_power_off); 149 150 void (*pm_power_off)(void); 151 EXPORT_SYMBOL_GPL(pm_power_off); 152 153 void machine_halt(void) 154 { 155 machine_shutdown(); 156 if (ppc_md.halt) 157 ppc_md.halt(); 158 smp_send_stop(); 159 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 160 local_irq_disable(); 161 while (1) ; 162 } 163 164 165 #ifdef CONFIG_TAU 166 extern u32 cpu_temp(unsigned long cpu); 167 extern u32 cpu_temp_both(unsigned long cpu); 168 #endif /* CONFIG_TAU */ 169 170 #ifdef CONFIG_SMP 171 DEFINE_PER_CPU(unsigned int, cpu_pvr); 172 #endif 173 174 static void show_cpuinfo_summary(struct seq_file *m) 175 { 176 struct device_node *root; 177 const char *model = NULL; 178 #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) 179 unsigned long bogosum = 0; 180 int i; 181 for_each_online_cpu(i) 182 bogosum += loops_per_jiffy; 183 seq_printf(m, "total bogomips\t: %lu.%02lu\n", 184 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); 185 #endif /* CONFIG_SMP && CONFIG_PPC32 */ 186 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); 187 if (ppc_md.name) 188 seq_printf(m, "platform\t: %s\n", ppc_md.name); 189 root = of_find_node_by_path("/"); 190 if (root) 191 model = of_get_property(root, "model", NULL); 192 if (model) 193 seq_printf(m, "model\t\t: %s\n", model); 194 of_node_put(root); 195 196 if (ppc_md.show_cpuinfo != NULL) 197 ppc_md.show_cpuinfo(m); 198 199 #ifdef CONFIG_PPC32 200 /* Display the amount of memory */ 201 seq_printf(m, "Memory\t\t: %d MB\n", 202 (unsigned int)(total_memory / (1024 * 1024))); 203 #endif 204 } 205 206 static int show_cpuinfo(struct seq_file *m, void *v) 207 { 208 unsigned long cpu_id = (unsigned long)v - 1; 209 unsigned int pvr; 210 unsigned long proc_freq; 211 unsigned short maj; 212 unsigned short min; 213 214 /* We only show online cpus: disable preempt (overzealous, I 215 * knew) to prevent cpu going down. */ 216 preempt_disable(); 217 if (!cpu_online(cpu_id)) { 218 preempt_enable(); 219 return 0; 220 } 221 222 #ifdef CONFIG_SMP 223 pvr = per_cpu(cpu_pvr, cpu_id); 224 #else 225 pvr = mfspr(SPRN_PVR); 226 #endif 227 maj = (pvr >> 8) & 0xFF; 228 min = pvr & 0xFF; 229 230 seq_printf(m, "processor\t: %lu\n", cpu_id); 231 seq_printf(m, "cpu\t\t: "); 232 233 if (cur_cpu_spec->pvr_mask) 234 seq_printf(m, "%s", cur_cpu_spec->cpu_name); 235 else 236 seq_printf(m, "unknown (%08x)", pvr); 237 238 #ifdef CONFIG_ALTIVEC 239 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 240 seq_printf(m, ", altivec supported"); 241 #endif /* CONFIG_ALTIVEC */ 242 243 seq_printf(m, "\n"); 244 245 #ifdef CONFIG_TAU 246 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { 247 #ifdef CONFIG_TAU_AVERAGE 248 /* more straightforward, but potentially misleading */ 249 seq_printf(m, "temperature \t: %u C (uncalibrated)\n", 250 cpu_temp(cpu_id)); 251 #else 252 /* show the actual temp sensor range */ 253 u32 temp; 254 temp = cpu_temp_both(cpu_id); 255 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", 256 temp & 0xff, temp >> 16); 257 #endif 258 } 259 #endif /* CONFIG_TAU */ 260 261 /* 262 * Platforms that have variable clock rates, should implement 263 * the method ppc_md.get_proc_freq() that reports the clock 264 * rate of a given cpu. The rest can use ppc_proc_freq to 265 * report the clock rate that is same across all cpus. 266 */ 267 if (ppc_md.get_proc_freq) 268 proc_freq = ppc_md.get_proc_freq(cpu_id); 269 else 270 proc_freq = ppc_proc_freq; 271 272 if (proc_freq) 273 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", 274 proc_freq / 1000000, proc_freq % 1000000); 275 276 if (ppc_md.show_percpuinfo != NULL) 277 ppc_md.show_percpuinfo(m, cpu_id); 278 279 /* If we are a Freescale core do a simple check so 280 * we dont have to keep adding cases in the future */ 281 if (PVR_VER(pvr) & 0x8000) { 282 switch (PVR_VER(pvr)) { 283 case 0x8000: /* 7441/7450/7451, Voyager */ 284 case 0x8001: /* 7445/7455, Apollo 6 */ 285 case 0x8002: /* 7447/7457, Apollo 7 */ 286 case 0x8003: /* 7447A, Apollo 7 PM */ 287 case 0x8004: /* 7448, Apollo 8 */ 288 case 0x800c: /* 7410, Nitro */ 289 maj = ((pvr >> 8) & 0xF); 290 min = PVR_MIN(pvr); 291 break; 292 default: /* e500/book-e */ 293 maj = PVR_MAJ(pvr); 294 min = PVR_MIN(pvr); 295 break; 296 } 297 } else { 298 switch (PVR_VER(pvr)) { 299 case 0x0020: /* 403 family */ 300 maj = PVR_MAJ(pvr) + 1; 301 min = PVR_MIN(pvr); 302 break; 303 case 0x1008: /* 740P/750P ?? */ 304 maj = ((pvr >> 8) & 0xFF) - 1; 305 min = pvr & 0xFF; 306 break; 307 default: 308 maj = (pvr >> 8) & 0xFF; 309 min = pvr & 0xFF; 310 break; 311 } 312 } 313 314 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", 315 maj, min, PVR_VER(pvr), PVR_REV(pvr)); 316 317 #ifdef CONFIG_PPC32 318 seq_printf(m, "bogomips\t: %lu.%02lu\n", 319 loops_per_jiffy / (500000/HZ), 320 (loops_per_jiffy / (5000/HZ)) % 100); 321 #endif 322 323 #ifdef CONFIG_SMP 324 seq_printf(m, "\n"); 325 #endif 326 327 preempt_enable(); 328 329 /* If this is the last cpu, print the summary */ 330 if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) 331 show_cpuinfo_summary(m); 332 333 return 0; 334 } 335 336 static void *c_start(struct seq_file *m, loff_t *pos) 337 { 338 if (*pos == 0) /* just in case, cpu 0 is not the first */ 339 *pos = cpumask_first(cpu_online_mask); 340 else 341 *pos = cpumask_next(*pos - 1, cpu_online_mask); 342 if ((*pos) < nr_cpu_ids) 343 return (void *)(unsigned long)(*pos + 1); 344 return NULL; 345 } 346 347 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 348 { 349 (*pos)++; 350 return c_start(m, pos); 351 } 352 353 static void c_stop(struct seq_file *m, void *v) 354 { 355 } 356 357 const struct seq_operations cpuinfo_op = { 358 .start =c_start, 359 .next = c_next, 360 .stop = c_stop, 361 .show = show_cpuinfo, 362 }; 363 364 void __init check_for_initrd(void) 365 { 366 #ifdef CONFIG_BLK_DEV_INITRD 367 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", 368 initrd_start, initrd_end); 369 370 /* If we were passed an initrd, set the ROOT_DEV properly if the values 371 * look sensible. If not, clear initrd reference. 372 */ 373 if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && 374 initrd_end > initrd_start) 375 ROOT_DEV = Root_RAM0; 376 else 377 initrd_start = initrd_end = 0; 378 379 if (initrd_start) 380 pr_info("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 381 382 DBG(" <- check_for_initrd()\n"); 383 #endif /* CONFIG_BLK_DEV_INITRD */ 384 } 385 386 #ifdef CONFIG_SMP 387 388 int threads_per_core, threads_per_subcore, threads_shift; 389 cpumask_t threads_core_mask; 390 EXPORT_SYMBOL_GPL(threads_per_core); 391 EXPORT_SYMBOL_GPL(threads_per_subcore); 392 EXPORT_SYMBOL_GPL(threads_shift); 393 EXPORT_SYMBOL_GPL(threads_core_mask); 394 395 static void __init cpu_init_thread_core_maps(int tpc) 396 { 397 int i; 398 399 threads_per_core = tpc; 400 threads_per_subcore = tpc; 401 cpumask_clear(&threads_core_mask); 402 403 /* This implementation only supports power of 2 number of threads 404 * for simplicity and performance 405 */ 406 threads_shift = ilog2(tpc); 407 BUG_ON(tpc != (1 << threads_shift)); 408 409 for (i = 0; i < tpc; i++) 410 cpumask_set_cpu(i, &threads_core_mask); 411 412 printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", 413 tpc, tpc > 1 ? "s" : ""); 414 printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); 415 } 416 417 418 /** 419 * setup_cpu_maps - initialize the following cpu maps: 420 * cpu_possible_mask 421 * cpu_present_mask 422 * 423 * Having the possible map set up early allows us to restrict allocations 424 * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. 425 * 426 * We do not initialize the online map here; cpus set their own bits in 427 * cpu_online_mask as they come up. 428 * 429 * This function is valid only for Open Firmware systems. finish_device_tree 430 * must be called before using this. 431 * 432 * While we're here, we may as well set the "physical" cpu ids in the paca. 433 * 434 * NOTE: This must match the parsing done in early_init_dt_scan_cpus. 435 */ 436 void __init smp_setup_cpu_maps(void) 437 { 438 struct device_node *dn = NULL; 439 int cpu = 0; 440 int nthreads = 1; 441 442 DBG("smp_setup_cpu_maps()\n"); 443 444 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) { 445 const __be32 *intserv; 446 __be32 cpu_be; 447 int j, len; 448 449 DBG(" * %s...\n", dn->full_name); 450 451 intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", 452 &len); 453 if (intserv) { 454 DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", 455 nthreads); 456 } else { 457 DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); 458 intserv = of_get_property(dn, "reg", &len); 459 if (!intserv) { 460 cpu_be = cpu_to_be32(cpu); 461 intserv = &cpu_be; /* assume logical == phys */ 462 len = 4; 463 } 464 } 465 466 nthreads = len / sizeof(int); 467 468 for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { 469 bool avail; 470 471 DBG(" thread %d -> cpu %d (hard id %d)\n", 472 j, cpu, be32_to_cpu(intserv[j])); 473 474 avail = of_device_is_available(dn); 475 if (!avail) 476 avail = !of_property_match_string(dn, 477 "enable-method", "spin-table"); 478 479 set_cpu_present(cpu, avail); 480 set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j])); 481 set_cpu_possible(cpu, true); 482 cpu++; 483 } 484 } 485 486 /* If no SMT supported, nthreads is forced to 1 */ 487 if (!cpu_has_feature(CPU_FTR_SMT)) { 488 DBG(" SMT disabled ! nthreads forced to 1\n"); 489 nthreads = 1; 490 } 491 492 #ifdef CONFIG_PPC64 493 /* 494 * On pSeries LPAR, we need to know how many cpus 495 * could possibly be added to this partition. 496 */ 497 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && 498 (dn = of_find_node_by_path("/rtas"))) { 499 int num_addr_cell, num_size_cell, maxcpus; 500 const __be32 *ireg; 501 502 num_addr_cell = of_n_addr_cells(dn); 503 num_size_cell = of_n_size_cells(dn); 504 505 ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); 506 507 if (!ireg) 508 goto out; 509 510 maxcpus = be32_to_cpup(ireg + num_addr_cell + num_size_cell); 511 512 /* Double maxcpus for processors which have SMT capability */ 513 if (cpu_has_feature(CPU_FTR_SMT)) 514 maxcpus *= nthreads; 515 516 if (maxcpus > nr_cpu_ids) { 517 printk(KERN_WARNING 518 "Partition configured for %d cpus, " 519 "operating system maximum is %d.\n", 520 maxcpus, nr_cpu_ids); 521 maxcpus = nr_cpu_ids; 522 } else 523 printk(KERN_INFO "Partition configured for %d cpus.\n", 524 maxcpus); 525 526 for (cpu = 0; cpu < maxcpus; cpu++) 527 set_cpu_possible(cpu, true); 528 out: 529 of_node_put(dn); 530 } 531 vdso_data->processorCount = num_present_cpus(); 532 #endif /* CONFIG_PPC64 */ 533 534 /* Initialize CPU <=> thread mapping/ 535 * 536 * WARNING: We assume that the number of threads is the same for 537 * every CPU in the system. If that is not the case, then some code 538 * here will have to be reworked 539 */ 540 cpu_init_thread_core_maps(nthreads); 541 542 /* Now that possible cpus are set, set nr_cpu_ids for later use */ 543 setup_nr_cpu_ids(); 544 545 free_unused_pacas(); 546 } 547 #endif /* CONFIG_SMP */ 548 549 #ifdef CONFIG_PCSPKR_PLATFORM 550 static __init int add_pcspkr(void) 551 { 552 struct device_node *np; 553 struct platform_device *pd; 554 int ret; 555 556 np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); 557 of_node_put(np); 558 if (!np) 559 return -ENODEV; 560 561 pd = platform_device_alloc("pcspkr", -1); 562 if (!pd) 563 return -ENOMEM; 564 565 ret = platform_device_add(pd); 566 if (ret) 567 platform_device_put(pd); 568 569 return ret; 570 } 571 device_initcall(add_pcspkr); 572 #endif /* CONFIG_PCSPKR_PLATFORM */ 573 574 void probe_machine(void) 575 { 576 extern struct machdep_calls __machine_desc_start; 577 extern struct machdep_calls __machine_desc_end; 578 579 /* 580 * Iterate all ppc_md structures until we find the proper 581 * one for the current machine type 582 */ 583 DBG("Probing machine type ...\n"); 584 585 for (machine_id = &__machine_desc_start; 586 machine_id < &__machine_desc_end; 587 machine_id++) { 588 DBG(" %s ...", machine_id->name); 589 memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); 590 if (ppc_md.probe()) { 591 DBG(" match !\n"); 592 break; 593 } 594 DBG("\n"); 595 } 596 /* What can we do if we didn't find ? */ 597 if (machine_id >= &__machine_desc_end) { 598 DBG("No suitable machine found !\n"); 599 for (;;); 600 } 601 602 printk(KERN_INFO "Using %s machine description\n", ppc_md.name); 603 } 604 605 /* Match a class of boards, not a specific device configuration. */ 606 int check_legacy_ioport(unsigned long base_port) 607 { 608 struct device_node *parent, *np = NULL; 609 int ret = -ENODEV; 610 611 switch(base_port) { 612 case I8042_DATA_REG: 613 if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) 614 np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); 615 if (np) { 616 parent = of_get_parent(np); 617 618 of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); 619 if (!of_i8042_kbd_irq) 620 of_i8042_kbd_irq = 1; 621 622 of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); 623 if (!of_i8042_aux_irq) 624 of_i8042_aux_irq = 12; 625 626 of_node_put(np); 627 np = parent; 628 break; 629 } 630 np = of_find_node_by_type(NULL, "8042"); 631 /* Pegasos has no device_type on its 8042 node, look for the 632 * name instead */ 633 if (!np) 634 np = of_find_node_by_name(NULL, "8042"); 635 if (np) { 636 of_i8042_kbd_irq = 1; 637 of_i8042_aux_irq = 12; 638 } 639 break; 640 case FDC_BASE: /* FDC1 */ 641 np = of_find_node_by_type(NULL, "fdc"); 642 break; 643 default: 644 /* ipmi is supposed to fail here */ 645 break; 646 } 647 if (!np) 648 return ret; 649 parent = of_get_parent(np); 650 if (parent) { 651 if (strcmp(parent->type, "isa") == 0) 652 ret = 0; 653 of_node_put(parent); 654 } 655 of_node_put(np); 656 return ret; 657 } 658 EXPORT_SYMBOL(check_legacy_ioport); 659 660 static int ppc_panic_event(struct notifier_block *this, 661 unsigned long event, void *ptr) 662 { 663 /* 664 * If firmware-assisted dump has been registered then trigger 665 * firmware-assisted dump and let firmware handle everything else. 666 */ 667 crash_fadump(NULL, ptr); 668 ppc_md.panic(ptr); /* May not return */ 669 return NOTIFY_DONE; 670 } 671 672 static struct notifier_block ppc_panic_block = { 673 .notifier_call = ppc_panic_event, 674 .priority = INT_MIN /* may not return; must be done last */ 675 }; 676 677 void __init setup_panic(void) 678 { 679 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); 680 } 681 682 #ifdef CONFIG_CHECK_CACHE_COHERENCY 683 /* 684 * For platforms that have configurable cache-coherency. This function 685 * checks that the cache coherency setting of the kernel matches the setting 686 * left by the firmware, as indicated in the device tree. Since a mismatch 687 * will eventually result in DMA failures, we print * and error and call 688 * BUG() in that case. 689 */ 690 691 #ifdef CONFIG_NOT_COHERENT_CACHE 692 #define KERNEL_COHERENCY 0 693 #else 694 #define KERNEL_COHERENCY 1 695 #endif 696 697 static int __init check_cache_coherency(void) 698 { 699 struct device_node *np; 700 const void *prop; 701 int devtree_coherency; 702 703 np = of_find_node_by_path("/"); 704 prop = of_get_property(np, "coherency-off", NULL); 705 of_node_put(np); 706 707 devtree_coherency = prop ? 0 : 1; 708 709 if (devtree_coherency != KERNEL_COHERENCY) { 710 printk(KERN_ERR 711 "kernel coherency:%s != device tree_coherency:%s\n", 712 KERNEL_COHERENCY ? "on" : "off", 713 devtree_coherency ? "on" : "off"); 714 BUG(); 715 } 716 717 return 0; 718 } 719 720 late_initcall(check_cache_coherency); 721 #endif /* CONFIG_CHECK_CACHE_COHERENCY */ 722 723 #ifdef CONFIG_DEBUG_FS 724 struct dentry *powerpc_debugfs_root; 725 EXPORT_SYMBOL(powerpc_debugfs_root); 726 727 static int powerpc_debugfs_init(void) 728 { 729 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); 730 731 return powerpc_debugfs_root == NULL; 732 } 733 arch_initcall(powerpc_debugfs_init); 734 #endif 735 736 void ppc_printk_progress(char *s, unsigned short hex) 737 { 738 pr_info("%s\n", s); 739 } 740 741 void arch_setup_pdev_archdata(struct platform_device *pdev) 742 { 743 pdev->archdata.dma_mask = DMA_BIT_MASK(32); 744 pdev->dev.dma_mask = &pdev->archdata.dma_mask; 745 set_dma_ops(&pdev->dev, &dma_direct_ops); 746 } 747