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 #ifdef CONFIG_SMP 132 smp_send_stop(); 133 #endif 134 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 135 local_irq_disable(); 136 while (1) ; 137 } 138 139 void machine_power_off(void) 140 { 141 machine_shutdown(); 142 if (pm_power_off) 143 pm_power_off(); 144 #ifdef CONFIG_SMP 145 smp_send_stop(); 146 #endif 147 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 148 local_irq_disable(); 149 while (1) ; 150 } 151 /* Used by the G5 thermal driver */ 152 EXPORT_SYMBOL_GPL(machine_power_off); 153 154 void (*pm_power_off)(void); 155 EXPORT_SYMBOL_GPL(pm_power_off); 156 157 void machine_halt(void) 158 { 159 machine_shutdown(); 160 if (ppc_md.halt) 161 ppc_md.halt(); 162 #ifdef CONFIG_SMP 163 smp_send_stop(); 164 #endif 165 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 166 local_irq_disable(); 167 while (1) ; 168 } 169 170 171 #ifdef CONFIG_TAU 172 extern u32 cpu_temp(unsigned long cpu); 173 extern u32 cpu_temp_both(unsigned long cpu); 174 #endif /* CONFIG_TAU */ 175 176 #ifdef CONFIG_SMP 177 DEFINE_PER_CPU(unsigned int, cpu_pvr); 178 #endif 179 180 static void show_cpuinfo_summary(struct seq_file *m) 181 { 182 struct device_node *root; 183 const char *model = NULL; 184 #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) 185 unsigned long bogosum = 0; 186 int i; 187 for_each_online_cpu(i) 188 bogosum += loops_per_jiffy; 189 seq_printf(m, "total bogomips\t: %lu.%02lu\n", 190 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); 191 #endif /* CONFIG_SMP && CONFIG_PPC32 */ 192 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); 193 if (ppc_md.name) 194 seq_printf(m, "platform\t: %s\n", ppc_md.name); 195 root = of_find_node_by_path("/"); 196 if (root) 197 model = of_get_property(root, "model", NULL); 198 if (model) 199 seq_printf(m, "model\t\t: %s\n", model); 200 of_node_put(root); 201 202 if (ppc_md.show_cpuinfo != NULL) 203 ppc_md.show_cpuinfo(m); 204 205 #ifdef CONFIG_PPC32 206 /* Display the amount of memory */ 207 seq_printf(m, "Memory\t\t: %d MB\n", 208 (unsigned int)(total_memory / (1024 * 1024))); 209 #endif 210 } 211 212 static int show_cpuinfo(struct seq_file *m, void *v) 213 { 214 unsigned long cpu_id = (unsigned long)v - 1; 215 unsigned int pvr; 216 unsigned long proc_freq; 217 unsigned short maj; 218 unsigned short min; 219 220 /* We only show online cpus: disable preempt (overzealous, I 221 * knew) to prevent cpu going down. */ 222 preempt_disable(); 223 if (!cpu_online(cpu_id)) { 224 preempt_enable(); 225 return 0; 226 } 227 228 #ifdef CONFIG_SMP 229 pvr = per_cpu(cpu_pvr, cpu_id); 230 #else 231 pvr = mfspr(SPRN_PVR); 232 #endif 233 maj = (pvr >> 8) & 0xFF; 234 min = pvr & 0xFF; 235 236 seq_printf(m, "processor\t: %lu\n", cpu_id); 237 seq_printf(m, "cpu\t\t: "); 238 239 if (cur_cpu_spec->pvr_mask) 240 seq_printf(m, "%s", cur_cpu_spec->cpu_name); 241 else 242 seq_printf(m, "unknown (%08x)", pvr); 243 244 #ifdef CONFIG_ALTIVEC 245 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 246 seq_printf(m, ", altivec supported"); 247 #endif /* CONFIG_ALTIVEC */ 248 249 seq_printf(m, "\n"); 250 251 #ifdef CONFIG_TAU 252 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { 253 #ifdef CONFIG_TAU_AVERAGE 254 /* more straightforward, but potentially misleading */ 255 seq_printf(m, "temperature \t: %u C (uncalibrated)\n", 256 cpu_temp(cpu_id)); 257 #else 258 /* show the actual temp sensor range */ 259 u32 temp; 260 temp = cpu_temp_both(cpu_id); 261 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", 262 temp & 0xff, temp >> 16); 263 #endif 264 } 265 #endif /* CONFIG_TAU */ 266 267 /* 268 * Platforms that have variable clock rates, should implement 269 * the method ppc_md.get_proc_freq() that reports the clock 270 * rate of a given cpu. The rest can use ppc_proc_freq to 271 * report the clock rate that is same across all cpus. 272 */ 273 if (ppc_md.get_proc_freq) 274 proc_freq = ppc_md.get_proc_freq(cpu_id); 275 else 276 proc_freq = ppc_proc_freq; 277 278 if (proc_freq) 279 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", 280 proc_freq / 1000000, proc_freq % 1000000); 281 282 if (ppc_md.show_percpuinfo != NULL) 283 ppc_md.show_percpuinfo(m, cpu_id); 284 285 /* If we are a Freescale core do a simple check so 286 * we dont have to keep adding cases in the future */ 287 if (PVR_VER(pvr) & 0x8000) { 288 switch (PVR_VER(pvr)) { 289 case 0x8000: /* 7441/7450/7451, Voyager */ 290 case 0x8001: /* 7445/7455, Apollo 6 */ 291 case 0x8002: /* 7447/7457, Apollo 7 */ 292 case 0x8003: /* 7447A, Apollo 7 PM */ 293 case 0x8004: /* 7448, Apollo 8 */ 294 case 0x800c: /* 7410, Nitro */ 295 maj = ((pvr >> 8) & 0xF); 296 min = PVR_MIN(pvr); 297 break; 298 default: /* e500/book-e */ 299 maj = PVR_MAJ(pvr); 300 min = PVR_MIN(pvr); 301 break; 302 } 303 } else { 304 switch (PVR_VER(pvr)) { 305 case 0x0020: /* 403 family */ 306 maj = PVR_MAJ(pvr) + 1; 307 min = PVR_MIN(pvr); 308 break; 309 case 0x1008: /* 740P/750P ?? */ 310 maj = ((pvr >> 8) & 0xFF) - 1; 311 min = pvr & 0xFF; 312 break; 313 default: 314 maj = (pvr >> 8) & 0xFF; 315 min = pvr & 0xFF; 316 break; 317 } 318 } 319 320 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", 321 maj, min, PVR_VER(pvr), PVR_REV(pvr)); 322 323 #ifdef CONFIG_PPC32 324 seq_printf(m, "bogomips\t: %lu.%02lu\n", 325 loops_per_jiffy / (500000/HZ), 326 (loops_per_jiffy / (5000/HZ)) % 100); 327 #endif 328 329 #ifdef CONFIG_SMP 330 seq_printf(m, "\n"); 331 #endif 332 333 preempt_enable(); 334 335 /* If this is the last cpu, print the summary */ 336 if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) 337 show_cpuinfo_summary(m); 338 339 return 0; 340 } 341 342 static void *c_start(struct seq_file *m, loff_t *pos) 343 { 344 if (*pos == 0) /* just in case, cpu 0 is not the first */ 345 *pos = cpumask_first(cpu_online_mask); 346 else 347 *pos = cpumask_next(*pos - 1, cpu_online_mask); 348 if ((*pos) < nr_cpu_ids) 349 return (void *)(unsigned long)(*pos + 1); 350 return NULL; 351 } 352 353 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 354 { 355 (*pos)++; 356 return c_start(m, pos); 357 } 358 359 static void c_stop(struct seq_file *m, void *v) 360 { 361 } 362 363 const struct seq_operations cpuinfo_op = { 364 .start =c_start, 365 .next = c_next, 366 .stop = c_stop, 367 .show = show_cpuinfo, 368 }; 369 370 void __init check_for_initrd(void) 371 { 372 #ifdef CONFIG_BLK_DEV_INITRD 373 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", 374 initrd_start, initrd_end); 375 376 /* If we were passed an initrd, set the ROOT_DEV properly if the values 377 * look sensible. If not, clear initrd reference. 378 */ 379 if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && 380 initrd_end > initrd_start) 381 ROOT_DEV = Root_RAM0; 382 else 383 initrd_start = initrd_end = 0; 384 385 if (initrd_start) 386 pr_info("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 387 388 DBG(" <- check_for_initrd()\n"); 389 #endif /* CONFIG_BLK_DEV_INITRD */ 390 } 391 392 #ifdef CONFIG_SMP 393 394 int threads_per_core, threads_per_subcore, threads_shift; 395 cpumask_t threads_core_mask; 396 EXPORT_SYMBOL_GPL(threads_per_core); 397 EXPORT_SYMBOL_GPL(threads_per_subcore); 398 EXPORT_SYMBOL_GPL(threads_shift); 399 EXPORT_SYMBOL_GPL(threads_core_mask); 400 401 static void __init cpu_init_thread_core_maps(int tpc) 402 { 403 int i; 404 405 threads_per_core = tpc; 406 threads_per_subcore = tpc; 407 cpumask_clear(&threads_core_mask); 408 409 /* This implementation only supports power of 2 number of threads 410 * for simplicity and performance 411 */ 412 threads_shift = ilog2(tpc); 413 BUG_ON(tpc != (1 << threads_shift)); 414 415 for (i = 0; i < tpc; i++) 416 cpumask_set_cpu(i, &threads_core_mask); 417 418 printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", 419 tpc, tpc > 1 ? "s" : ""); 420 printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); 421 } 422 423 424 /** 425 * setup_cpu_maps - initialize the following cpu maps: 426 * cpu_possible_mask 427 * cpu_present_mask 428 * 429 * Having the possible map set up early allows us to restrict allocations 430 * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. 431 * 432 * We do not initialize the online map here; cpus set their own bits in 433 * cpu_online_mask as they come up. 434 * 435 * This function is valid only for Open Firmware systems. finish_device_tree 436 * must be called before using this. 437 * 438 * While we're here, we may as well set the "physical" cpu ids in the paca. 439 * 440 * NOTE: This must match the parsing done in early_init_dt_scan_cpus. 441 */ 442 void __init smp_setup_cpu_maps(void) 443 { 444 struct device_node *dn = NULL; 445 int cpu = 0; 446 int nthreads = 1; 447 448 DBG("smp_setup_cpu_maps()\n"); 449 450 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) { 451 const __be32 *intserv; 452 __be32 cpu_be; 453 int j, len; 454 455 DBG(" * %s...\n", dn->full_name); 456 457 intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", 458 &len); 459 if (intserv) { 460 DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", 461 nthreads); 462 } else { 463 DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); 464 intserv = of_get_property(dn, "reg", &len); 465 if (!intserv) { 466 cpu_be = cpu_to_be32(cpu); 467 intserv = &cpu_be; /* assume logical == phys */ 468 len = 4; 469 } 470 } 471 472 nthreads = len / sizeof(int); 473 474 for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { 475 bool avail; 476 477 DBG(" thread %d -> cpu %d (hard id %d)\n", 478 j, cpu, be32_to_cpu(intserv[j])); 479 480 avail = of_device_is_available(dn); 481 if (!avail) 482 avail = !of_property_match_string(dn, 483 "enable-method", "spin-table"); 484 485 set_cpu_present(cpu, avail); 486 set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j])); 487 set_cpu_possible(cpu, true); 488 cpu++; 489 } 490 } 491 492 /* If no SMT supported, nthreads is forced to 1 */ 493 if (!cpu_has_feature(CPU_FTR_SMT)) { 494 DBG(" SMT disabled ! nthreads forced to 1\n"); 495 nthreads = 1; 496 } 497 498 #ifdef CONFIG_PPC64 499 /* 500 * On pSeries LPAR, we need to know how many cpus 501 * could possibly be added to this partition. 502 */ 503 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && 504 (dn = of_find_node_by_path("/rtas"))) { 505 int num_addr_cell, num_size_cell, maxcpus; 506 const __be32 *ireg; 507 508 num_addr_cell = of_n_addr_cells(dn); 509 num_size_cell = of_n_size_cells(dn); 510 511 ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); 512 513 if (!ireg) 514 goto out; 515 516 maxcpus = be32_to_cpup(ireg + num_addr_cell + num_size_cell); 517 518 /* Double maxcpus for processors which have SMT capability */ 519 if (cpu_has_feature(CPU_FTR_SMT)) 520 maxcpus *= nthreads; 521 522 if (maxcpus > nr_cpu_ids) { 523 printk(KERN_WARNING 524 "Partition configured for %d cpus, " 525 "operating system maximum is %d.\n", 526 maxcpus, nr_cpu_ids); 527 maxcpus = nr_cpu_ids; 528 } else 529 printk(KERN_INFO "Partition configured for %d cpus.\n", 530 maxcpus); 531 532 for (cpu = 0; cpu < maxcpus; cpu++) 533 set_cpu_possible(cpu, true); 534 out: 535 of_node_put(dn); 536 } 537 vdso_data->processorCount = num_present_cpus(); 538 #endif /* CONFIG_PPC64 */ 539 540 /* Initialize CPU <=> thread mapping/ 541 * 542 * WARNING: We assume that the number of threads is the same for 543 * every CPU in the system. If that is not the case, then some code 544 * here will have to be reworked 545 */ 546 cpu_init_thread_core_maps(nthreads); 547 548 /* Now that possible cpus are set, set nr_cpu_ids for later use */ 549 setup_nr_cpu_ids(); 550 551 free_unused_pacas(); 552 } 553 #endif /* CONFIG_SMP */ 554 555 #ifdef CONFIG_PCSPKR_PLATFORM 556 static __init int add_pcspkr(void) 557 { 558 struct device_node *np; 559 struct platform_device *pd; 560 int ret; 561 562 np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); 563 of_node_put(np); 564 if (!np) 565 return -ENODEV; 566 567 pd = platform_device_alloc("pcspkr", -1); 568 if (!pd) 569 return -ENOMEM; 570 571 ret = platform_device_add(pd); 572 if (ret) 573 platform_device_put(pd); 574 575 return ret; 576 } 577 device_initcall(add_pcspkr); 578 #endif /* CONFIG_PCSPKR_PLATFORM */ 579 580 void probe_machine(void) 581 { 582 extern struct machdep_calls __machine_desc_start; 583 extern struct machdep_calls __machine_desc_end; 584 585 /* 586 * Iterate all ppc_md structures until we find the proper 587 * one for the current machine type 588 */ 589 DBG("Probing machine type ...\n"); 590 591 for (machine_id = &__machine_desc_start; 592 machine_id < &__machine_desc_end; 593 machine_id++) { 594 DBG(" %s ...", machine_id->name); 595 memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); 596 if (ppc_md.probe()) { 597 DBG(" match !\n"); 598 break; 599 } 600 DBG("\n"); 601 } 602 /* What can we do if we didn't find ? */ 603 if (machine_id >= &__machine_desc_end) { 604 DBG("No suitable machine found !\n"); 605 for (;;); 606 } 607 608 printk(KERN_INFO "Using %s machine description\n", ppc_md.name); 609 } 610 611 /* Match a class of boards, not a specific device configuration. */ 612 int check_legacy_ioport(unsigned long base_port) 613 { 614 struct device_node *parent, *np = NULL; 615 int ret = -ENODEV; 616 617 switch(base_port) { 618 case I8042_DATA_REG: 619 if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) 620 np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); 621 if (np) { 622 parent = of_get_parent(np); 623 624 of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); 625 if (!of_i8042_kbd_irq) 626 of_i8042_kbd_irq = 1; 627 628 of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); 629 if (!of_i8042_aux_irq) 630 of_i8042_aux_irq = 12; 631 632 of_node_put(np); 633 np = parent; 634 break; 635 } 636 np = of_find_node_by_type(NULL, "8042"); 637 /* Pegasos has no device_type on its 8042 node, look for the 638 * name instead */ 639 if (!np) 640 np = of_find_node_by_name(NULL, "8042"); 641 if (np) { 642 of_i8042_kbd_irq = 1; 643 of_i8042_aux_irq = 12; 644 } 645 break; 646 case FDC_BASE: /* FDC1 */ 647 np = of_find_node_by_type(NULL, "fdc"); 648 break; 649 default: 650 /* ipmi is supposed to fail here */ 651 break; 652 } 653 if (!np) 654 return ret; 655 parent = of_get_parent(np); 656 if (parent) { 657 if (strcmp(parent->type, "isa") == 0) 658 ret = 0; 659 of_node_put(parent); 660 } 661 of_node_put(np); 662 return ret; 663 } 664 EXPORT_SYMBOL(check_legacy_ioport); 665 666 static int ppc_panic_event(struct notifier_block *this, 667 unsigned long event, void *ptr) 668 { 669 /* 670 * If firmware-assisted dump has been registered then trigger 671 * firmware-assisted dump and let firmware handle everything else. 672 */ 673 crash_fadump(NULL, ptr); 674 ppc_md.panic(ptr); /* May not return */ 675 return NOTIFY_DONE; 676 } 677 678 static struct notifier_block ppc_panic_block = { 679 .notifier_call = ppc_panic_event, 680 .priority = INT_MIN /* may not return; must be done last */ 681 }; 682 683 void __init setup_panic(void) 684 { 685 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); 686 } 687 688 #ifdef CONFIG_CHECK_CACHE_COHERENCY 689 /* 690 * For platforms that have configurable cache-coherency. This function 691 * checks that the cache coherency setting of the kernel matches the setting 692 * left by the firmware, as indicated in the device tree. Since a mismatch 693 * will eventually result in DMA failures, we print * and error and call 694 * BUG() in that case. 695 */ 696 697 #ifdef CONFIG_NOT_COHERENT_CACHE 698 #define KERNEL_COHERENCY 0 699 #else 700 #define KERNEL_COHERENCY 1 701 #endif 702 703 static int __init check_cache_coherency(void) 704 { 705 struct device_node *np; 706 const void *prop; 707 int devtree_coherency; 708 709 np = of_find_node_by_path("/"); 710 prop = of_get_property(np, "coherency-off", NULL); 711 of_node_put(np); 712 713 devtree_coherency = prop ? 0 : 1; 714 715 if (devtree_coherency != KERNEL_COHERENCY) { 716 printk(KERN_ERR 717 "kernel coherency:%s != device tree_coherency:%s\n", 718 KERNEL_COHERENCY ? "on" : "off", 719 devtree_coherency ? "on" : "off"); 720 BUG(); 721 } 722 723 return 0; 724 } 725 726 late_initcall(check_cache_coherency); 727 #endif /* CONFIG_CHECK_CACHE_COHERENCY */ 728 729 #ifdef CONFIG_DEBUG_FS 730 struct dentry *powerpc_debugfs_root; 731 EXPORT_SYMBOL(powerpc_debugfs_root); 732 733 static int powerpc_debugfs_init(void) 734 { 735 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); 736 737 return powerpc_debugfs_root == NULL; 738 } 739 arch_initcall(powerpc_debugfs_init); 740 #endif 741 742 void ppc_printk_progress(char *s, unsigned short hex) 743 { 744 pr_info("%s\n", s); 745 } 746 747 void arch_setup_pdev_archdata(struct platform_device *pdev) 748 { 749 pdev->archdata.dma_mask = DMA_BIT_MASK(32); 750 pdev->dev.dma_mask = &pdev->archdata.dma_mask; 751 set_dma_ops(&pdev->dev, &dma_direct_ops); 752 } 753