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 char cmd_line[COMMAND_LINE_SIZE]; 85 86 /* 87 * This still seems to be needed... -- paulus 88 */ 89 struct screen_info screen_info = { 90 .orig_x = 0, 91 .orig_y = 25, 92 .orig_video_cols = 80, 93 .orig_video_lines = 25, 94 .orig_video_isVGA = 1, 95 .orig_video_points = 16 96 }; 97 98 /* Variables required to store legacy IO irq routing */ 99 int of_i8042_kbd_irq; 100 EXPORT_SYMBOL_GPL(of_i8042_kbd_irq); 101 int of_i8042_aux_irq; 102 EXPORT_SYMBOL_GPL(of_i8042_aux_irq); 103 104 #ifdef __DO_IRQ_CANON 105 /* XXX should go elsewhere eventually */ 106 int ppc_do_canonicalize_irqs; 107 EXPORT_SYMBOL(ppc_do_canonicalize_irqs); 108 #endif 109 110 /* also used by kexec */ 111 void machine_shutdown(void) 112 { 113 #ifdef CONFIG_FA_DUMP 114 /* 115 * if fadump is active, cleanup the fadump registration before we 116 * shutdown. 117 */ 118 fadump_cleanup(); 119 #endif 120 121 if (ppc_md.machine_shutdown) 122 ppc_md.machine_shutdown(); 123 } 124 125 void machine_restart(char *cmd) 126 { 127 machine_shutdown(); 128 if (ppc_md.restart) 129 ppc_md.restart(cmd); 130 #ifdef CONFIG_SMP 131 smp_send_stop(); 132 #endif 133 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 134 local_irq_disable(); 135 while (1) ; 136 } 137 138 void machine_power_off(void) 139 { 140 machine_shutdown(); 141 if (ppc_md.power_off) 142 ppc_md.power_off(); 143 #ifdef CONFIG_SMP 144 smp_send_stop(); 145 #endif 146 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 147 local_irq_disable(); 148 while (1) ; 149 } 150 /* Used by the G5 thermal driver */ 151 EXPORT_SYMBOL_GPL(machine_power_off); 152 153 void (*pm_power_off)(void) = machine_power_off; 154 EXPORT_SYMBOL_GPL(pm_power_off); 155 156 void machine_halt(void) 157 { 158 machine_shutdown(); 159 if (ppc_md.halt) 160 ppc_md.halt(); 161 #ifdef CONFIG_SMP 162 smp_send_stop(); 163 #endif 164 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 165 local_irq_disable(); 166 while (1) ; 167 } 168 169 170 #ifdef CONFIG_TAU 171 extern u32 cpu_temp(unsigned long cpu); 172 extern u32 cpu_temp_both(unsigned long cpu); 173 #endif /* CONFIG_TAU */ 174 175 #ifdef CONFIG_SMP 176 DEFINE_PER_CPU(unsigned int, cpu_pvr); 177 #endif 178 179 static void show_cpuinfo_summary(struct seq_file *m) 180 { 181 struct device_node *root; 182 const char *model = NULL; 183 #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) 184 unsigned long bogosum = 0; 185 int i; 186 for_each_online_cpu(i) 187 bogosum += loops_per_jiffy; 188 seq_printf(m, "total bogomips\t: %lu.%02lu\n", 189 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); 190 #endif /* CONFIG_SMP && CONFIG_PPC32 */ 191 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); 192 if (ppc_md.name) 193 seq_printf(m, "platform\t: %s\n", ppc_md.name); 194 root = of_find_node_by_path("/"); 195 if (root) 196 model = of_get_property(root, "model", NULL); 197 if (model) 198 seq_printf(m, "model\t\t: %s\n", model); 199 of_node_put(root); 200 201 if (ppc_md.show_cpuinfo != NULL) 202 ppc_md.show_cpuinfo(m); 203 204 #ifdef CONFIG_PPC32 205 /* Display the amount of memory */ 206 seq_printf(m, "Memory\t\t: %d MB\n", 207 (unsigned int)(total_memory / (1024 * 1024))); 208 #endif 209 } 210 211 static int show_cpuinfo(struct seq_file *m, void *v) 212 { 213 unsigned long cpu_id = (unsigned long)v - 1; 214 unsigned int pvr; 215 unsigned long proc_freq; 216 unsigned short maj; 217 unsigned short min; 218 219 /* We only show online cpus: disable preempt (overzealous, I 220 * knew) to prevent cpu going down. */ 221 preempt_disable(); 222 if (!cpu_online(cpu_id)) { 223 preempt_enable(); 224 return 0; 225 } 226 227 #ifdef CONFIG_SMP 228 pvr = per_cpu(cpu_pvr, cpu_id); 229 #else 230 pvr = mfspr(SPRN_PVR); 231 #endif 232 maj = (pvr >> 8) & 0xFF; 233 min = pvr & 0xFF; 234 235 seq_printf(m, "processor\t: %lu\n", cpu_id); 236 seq_printf(m, "cpu\t\t: "); 237 238 if (cur_cpu_spec->pvr_mask) 239 seq_printf(m, "%s", cur_cpu_spec->cpu_name); 240 else 241 seq_printf(m, "unknown (%08x)", pvr); 242 243 #ifdef CONFIG_ALTIVEC 244 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 245 seq_printf(m, ", altivec supported"); 246 #endif /* CONFIG_ALTIVEC */ 247 248 seq_printf(m, "\n"); 249 250 #ifdef CONFIG_TAU 251 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { 252 #ifdef CONFIG_TAU_AVERAGE 253 /* more straightforward, but potentially misleading */ 254 seq_printf(m, "temperature \t: %u C (uncalibrated)\n", 255 cpu_temp(cpu_id)); 256 #else 257 /* show the actual temp sensor range */ 258 u32 temp; 259 temp = cpu_temp_both(cpu_id); 260 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", 261 temp & 0xff, temp >> 16); 262 #endif 263 } 264 #endif /* CONFIG_TAU */ 265 266 /* 267 * Platforms that have variable clock rates, should implement 268 * the method ppc_md.get_proc_freq() that reports the clock 269 * rate of a given cpu. The rest can use ppc_proc_freq to 270 * report the clock rate that is same across all cpus. 271 */ 272 if (ppc_md.get_proc_freq) 273 proc_freq = ppc_md.get_proc_freq(cpu_id); 274 else 275 proc_freq = ppc_proc_freq; 276 277 if (proc_freq) 278 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", 279 proc_freq / 1000000, proc_freq % 1000000); 280 281 if (ppc_md.show_percpuinfo != NULL) 282 ppc_md.show_percpuinfo(m, cpu_id); 283 284 /* If we are a Freescale core do a simple check so 285 * we dont have to keep adding cases in the future */ 286 if (PVR_VER(pvr) & 0x8000) { 287 switch (PVR_VER(pvr)) { 288 case 0x8000: /* 7441/7450/7451, Voyager */ 289 case 0x8001: /* 7445/7455, Apollo 6 */ 290 case 0x8002: /* 7447/7457, Apollo 7 */ 291 case 0x8003: /* 7447A, Apollo 7 PM */ 292 case 0x8004: /* 7448, Apollo 8 */ 293 case 0x800c: /* 7410, Nitro */ 294 maj = ((pvr >> 8) & 0xF); 295 min = PVR_MIN(pvr); 296 break; 297 default: /* e500/book-e */ 298 maj = PVR_MAJ(pvr); 299 min = PVR_MIN(pvr); 300 break; 301 } 302 } else { 303 switch (PVR_VER(pvr)) { 304 case 0x0020: /* 403 family */ 305 maj = PVR_MAJ(pvr) + 1; 306 min = PVR_MIN(pvr); 307 break; 308 case 0x1008: /* 740P/750P ?? */ 309 maj = ((pvr >> 8) & 0xFF) - 1; 310 min = pvr & 0xFF; 311 break; 312 default: 313 maj = (pvr >> 8) & 0xFF; 314 min = pvr & 0xFF; 315 break; 316 } 317 } 318 319 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", 320 maj, min, PVR_VER(pvr), PVR_REV(pvr)); 321 322 #ifdef CONFIG_PPC32 323 seq_printf(m, "bogomips\t: %lu.%02lu\n", 324 loops_per_jiffy / (500000/HZ), 325 (loops_per_jiffy / (5000/HZ)) % 100); 326 #endif 327 328 #ifdef CONFIG_SMP 329 seq_printf(m, "\n"); 330 #endif 331 332 preempt_enable(); 333 334 /* If this is the last cpu, print the summary */ 335 if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) 336 show_cpuinfo_summary(m); 337 338 return 0; 339 } 340 341 static void *c_start(struct seq_file *m, loff_t *pos) 342 { 343 if (*pos == 0) /* just in case, cpu 0 is not the first */ 344 *pos = cpumask_first(cpu_online_mask); 345 else 346 *pos = cpumask_next(*pos - 1, cpu_online_mask); 347 if ((*pos) < nr_cpu_ids) 348 return (void *)(unsigned long)(*pos + 1); 349 return NULL; 350 } 351 352 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 353 { 354 (*pos)++; 355 return c_start(m, pos); 356 } 357 358 static void c_stop(struct seq_file *m, void *v) 359 { 360 } 361 362 const struct seq_operations cpuinfo_op = { 363 .start =c_start, 364 .next = c_next, 365 .stop = c_stop, 366 .show = show_cpuinfo, 367 }; 368 369 void __init check_for_initrd(void) 370 { 371 #ifdef CONFIG_BLK_DEV_INITRD 372 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", 373 initrd_start, initrd_end); 374 375 /* If we were passed an initrd, set the ROOT_DEV properly if the values 376 * look sensible. If not, clear initrd reference. 377 */ 378 if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && 379 initrd_end > initrd_start) 380 ROOT_DEV = Root_RAM0; 381 else 382 initrd_start = initrd_end = 0; 383 384 if (initrd_start) 385 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 386 387 DBG(" <- check_for_initrd()\n"); 388 #endif /* CONFIG_BLK_DEV_INITRD */ 389 } 390 391 #ifdef CONFIG_SMP 392 393 int threads_per_core, threads_per_subcore, threads_shift; 394 cpumask_t threads_core_mask; 395 EXPORT_SYMBOL_GPL(threads_per_core); 396 EXPORT_SYMBOL_GPL(threads_per_subcore); 397 EXPORT_SYMBOL_GPL(threads_shift); 398 EXPORT_SYMBOL_GPL(threads_core_mask); 399 400 static void __init cpu_init_thread_core_maps(int tpc) 401 { 402 int i; 403 404 threads_per_core = tpc; 405 threads_per_subcore = tpc; 406 cpumask_clear(&threads_core_mask); 407 408 /* This implementation only supports power of 2 number of threads 409 * for simplicity and performance 410 */ 411 threads_shift = ilog2(tpc); 412 BUG_ON(tpc != (1 << threads_shift)); 413 414 for (i = 0; i < tpc; i++) 415 cpumask_set_cpu(i, &threads_core_mask); 416 417 printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", 418 tpc, tpc > 1 ? "s" : ""); 419 printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); 420 } 421 422 423 /** 424 * setup_cpu_maps - initialize the following cpu maps: 425 * cpu_possible_mask 426 * cpu_present_mask 427 * 428 * Having the possible map set up early allows us to restrict allocations 429 * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. 430 * 431 * We do not initialize the online map here; cpus set their own bits in 432 * cpu_online_mask as they come up. 433 * 434 * This function is valid only for Open Firmware systems. finish_device_tree 435 * must be called before using this. 436 * 437 * While we're here, we may as well set the "physical" cpu ids in the paca. 438 * 439 * NOTE: This must match the parsing done in early_init_dt_scan_cpus. 440 */ 441 void __init smp_setup_cpu_maps(void) 442 { 443 struct device_node *dn = NULL; 444 int cpu = 0; 445 int nthreads = 1; 446 447 DBG("smp_setup_cpu_maps()\n"); 448 449 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) { 450 const __be32 *intserv; 451 __be32 cpu_be; 452 int j, len; 453 454 DBG(" * %s...\n", dn->full_name); 455 456 intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", 457 &len); 458 if (intserv) { 459 DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", 460 nthreads); 461 } else { 462 DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); 463 intserv = of_get_property(dn, "reg", &len); 464 if (!intserv) { 465 cpu_be = cpu_to_be32(cpu); 466 intserv = &cpu_be; /* assume logical == phys */ 467 len = 4; 468 } 469 } 470 471 nthreads = len / sizeof(int); 472 473 for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { 474 bool avail; 475 476 DBG(" thread %d -> cpu %d (hard id %d)\n", 477 j, cpu, be32_to_cpu(intserv[j])); 478 479 avail = of_device_is_available(dn); 480 if (!avail) 481 avail = !of_property_match_string(dn, 482 "enable-method", "spin-table"); 483 484 set_cpu_present(cpu, avail); 485 set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j])); 486 set_cpu_possible(cpu, true); 487 cpu++; 488 } 489 } 490 491 /* If no SMT supported, nthreads is forced to 1 */ 492 if (!cpu_has_feature(CPU_FTR_SMT)) { 493 DBG(" SMT disabled ! nthreads forced to 1\n"); 494 nthreads = 1; 495 } 496 497 #ifdef CONFIG_PPC64 498 /* 499 * On pSeries LPAR, we need to know how many cpus 500 * could possibly be added to this partition. 501 */ 502 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && 503 (dn = of_find_node_by_path("/rtas"))) { 504 int num_addr_cell, num_size_cell, maxcpus; 505 const __be32 *ireg; 506 507 num_addr_cell = of_n_addr_cells(dn); 508 num_size_cell = of_n_size_cells(dn); 509 510 ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); 511 512 if (!ireg) 513 goto out; 514 515 maxcpus = be32_to_cpup(ireg + num_addr_cell + num_size_cell); 516 517 /* Double maxcpus for processors which have SMT capability */ 518 if (cpu_has_feature(CPU_FTR_SMT)) 519 maxcpus *= nthreads; 520 521 if (maxcpus > nr_cpu_ids) { 522 printk(KERN_WARNING 523 "Partition configured for %d cpus, " 524 "operating system maximum is %d.\n", 525 maxcpus, nr_cpu_ids); 526 maxcpus = nr_cpu_ids; 527 } else 528 printk(KERN_INFO "Partition configured for %d cpus.\n", 529 maxcpus); 530 531 for (cpu = 0; cpu < maxcpus; cpu++) 532 set_cpu_possible(cpu, true); 533 out: 534 of_node_put(dn); 535 } 536 vdso_data->processorCount = num_present_cpus(); 537 #endif /* CONFIG_PPC64 */ 538 539 /* Initialize CPU <=> thread mapping/ 540 * 541 * WARNING: We assume that the number of threads is the same for 542 * every CPU in the system. If that is not the case, then some code 543 * here will have to be reworked 544 */ 545 cpu_init_thread_core_maps(nthreads); 546 547 /* Now that possible cpus are set, set nr_cpu_ids for later use */ 548 setup_nr_cpu_ids(); 549 550 free_unused_pacas(); 551 } 552 #endif /* CONFIG_SMP */ 553 554 #ifdef CONFIG_PCSPKR_PLATFORM 555 static __init int add_pcspkr(void) 556 { 557 struct device_node *np; 558 struct platform_device *pd; 559 int ret; 560 561 np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); 562 of_node_put(np); 563 if (!np) 564 return -ENODEV; 565 566 pd = platform_device_alloc("pcspkr", -1); 567 if (!pd) 568 return -ENOMEM; 569 570 ret = platform_device_add(pd); 571 if (ret) 572 platform_device_put(pd); 573 574 return ret; 575 } 576 device_initcall(add_pcspkr); 577 #endif /* CONFIG_PCSPKR_PLATFORM */ 578 579 void probe_machine(void) 580 { 581 extern struct machdep_calls __machine_desc_start; 582 extern struct machdep_calls __machine_desc_end; 583 584 /* 585 * Iterate all ppc_md structures until we find the proper 586 * one for the current machine type 587 */ 588 DBG("Probing machine type ...\n"); 589 590 for (machine_id = &__machine_desc_start; 591 machine_id < &__machine_desc_end; 592 machine_id++) { 593 DBG(" %s ...", machine_id->name); 594 memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); 595 if (ppc_md.probe()) { 596 DBG(" match !\n"); 597 break; 598 } 599 DBG("\n"); 600 } 601 /* What can we do if we didn't find ? */ 602 if (machine_id >= &__machine_desc_end) { 603 DBG("No suitable machine found !\n"); 604 for (;;); 605 } 606 607 printk(KERN_INFO "Using %s machine description\n", ppc_md.name); 608 } 609 610 /* Match a class of boards, not a specific device configuration. */ 611 int check_legacy_ioport(unsigned long base_port) 612 { 613 struct device_node *parent, *np = NULL; 614 int ret = -ENODEV; 615 616 switch(base_port) { 617 case I8042_DATA_REG: 618 if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) 619 np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); 620 if (np) { 621 parent = of_get_parent(np); 622 623 of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); 624 if (!of_i8042_kbd_irq) 625 of_i8042_kbd_irq = 1; 626 627 of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); 628 if (!of_i8042_aux_irq) 629 of_i8042_aux_irq = 12; 630 631 of_node_put(np); 632 np = parent; 633 break; 634 } 635 np = of_find_node_by_type(NULL, "8042"); 636 /* Pegasos has no device_type on its 8042 node, look for the 637 * name instead */ 638 if (!np) 639 np = of_find_node_by_name(NULL, "8042"); 640 if (np) { 641 of_i8042_kbd_irq = 1; 642 of_i8042_aux_irq = 12; 643 } 644 break; 645 case FDC_BASE: /* FDC1 */ 646 np = of_find_node_by_type(NULL, "fdc"); 647 break; 648 default: 649 /* ipmi is supposed to fail here */ 650 break; 651 } 652 if (!np) 653 return ret; 654 parent = of_get_parent(np); 655 if (parent) { 656 if (strcmp(parent->type, "isa") == 0) 657 ret = 0; 658 of_node_put(parent); 659 } 660 of_node_put(np); 661 return ret; 662 } 663 EXPORT_SYMBOL(check_legacy_ioport); 664 665 static int ppc_panic_event(struct notifier_block *this, 666 unsigned long event, void *ptr) 667 { 668 /* 669 * If firmware-assisted dump has been registered then trigger 670 * firmware-assisted dump and let firmware handle everything else. 671 */ 672 crash_fadump(NULL, ptr); 673 ppc_md.panic(ptr); /* May not return */ 674 return NOTIFY_DONE; 675 } 676 677 static struct notifier_block ppc_panic_block = { 678 .notifier_call = ppc_panic_event, 679 .priority = INT_MIN /* may not return; must be done last */ 680 }; 681 682 void __init setup_panic(void) 683 { 684 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); 685 } 686 687 #ifdef CONFIG_CHECK_CACHE_COHERENCY 688 /* 689 * For platforms that have configurable cache-coherency. This function 690 * checks that the cache coherency setting of the kernel matches the setting 691 * left by the firmware, as indicated in the device tree. Since a mismatch 692 * will eventually result in DMA failures, we print * and error and call 693 * BUG() in that case. 694 */ 695 696 #ifdef CONFIG_NOT_COHERENT_CACHE 697 #define KERNEL_COHERENCY 0 698 #else 699 #define KERNEL_COHERENCY 1 700 #endif 701 702 static int __init check_cache_coherency(void) 703 { 704 struct device_node *np; 705 const void *prop; 706 int devtree_coherency; 707 708 np = of_find_node_by_path("/"); 709 prop = of_get_property(np, "coherency-off", NULL); 710 of_node_put(np); 711 712 devtree_coherency = prop ? 0 : 1; 713 714 if (devtree_coherency != KERNEL_COHERENCY) { 715 printk(KERN_ERR 716 "kernel coherency:%s != device tree_coherency:%s\n", 717 KERNEL_COHERENCY ? "on" : "off", 718 devtree_coherency ? "on" : "off"); 719 BUG(); 720 } 721 722 return 0; 723 } 724 725 late_initcall(check_cache_coherency); 726 #endif /* CONFIG_CHECK_CACHE_COHERENCY */ 727 728 #ifdef CONFIG_DEBUG_FS 729 struct dentry *powerpc_debugfs_root; 730 EXPORT_SYMBOL(powerpc_debugfs_root); 731 732 static int powerpc_debugfs_init(void) 733 { 734 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); 735 736 return powerpc_debugfs_root == NULL; 737 } 738 arch_initcall(powerpc_debugfs_init); 739 #endif 740 741 void ppc_printk_progress(char *s, unsigned short hex) 742 { 743 pr_info("%s\n", s); 744 } 745 746 void arch_setup_pdev_archdata(struct platform_device *pdev) 747 { 748 pdev->archdata.dma_mask = DMA_BIT_MASK(32); 749 pdev->dev.dma_mask = &pdev->archdata.dma_mask; 750 set_dma_ops(&pdev->dev, &dma_direct_ops); 751 } 752