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 short maj; 216 unsigned short min; 217 218 /* We only show online cpus: disable preempt (overzealous, I 219 * knew) to prevent cpu going down. */ 220 preempt_disable(); 221 if (!cpu_online(cpu_id)) { 222 preempt_enable(); 223 return 0; 224 } 225 226 #ifdef CONFIG_SMP 227 pvr = per_cpu(cpu_pvr, cpu_id); 228 #else 229 pvr = mfspr(SPRN_PVR); 230 #endif 231 maj = (pvr >> 8) & 0xFF; 232 min = pvr & 0xFF; 233 234 seq_printf(m, "processor\t: %lu\n", cpu_id); 235 seq_printf(m, "cpu\t\t: "); 236 237 if (cur_cpu_spec->pvr_mask) 238 seq_printf(m, "%s", cur_cpu_spec->cpu_name); 239 else 240 seq_printf(m, "unknown (%08x)", pvr); 241 242 #ifdef CONFIG_ALTIVEC 243 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 244 seq_printf(m, ", altivec supported"); 245 #endif /* CONFIG_ALTIVEC */ 246 247 seq_printf(m, "\n"); 248 249 #ifdef CONFIG_TAU 250 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { 251 #ifdef CONFIG_TAU_AVERAGE 252 /* more straightforward, but potentially misleading */ 253 seq_printf(m, "temperature \t: %u C (uncalibrated)\n", 254 cpu_temp(cpu_id)); 255 #else 256 /* show the actual temp sensor range */ 257 u32 temp; 258 temp = cpu_temp_both(cpu_id); 259 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", 260 temp & 0xff, temp >> 16); 261 #endif 262 } 263 #endif /* CONFIG_TAU */ 264 265 /* 266 * Assume here that all clock rates are the same in a 267 * smp system. -- Cort 268 */ 269 if (ppc_proc_freq) 270 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", 271 ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); 272 273 if (ppc_md.show_percpuinfo != NULL) 274 ppc_md.show_percpuinfo(m, cpu_id); 275 276 /* If we are a Freescale core do a simple check so 277 * we dont have to keep adding cases in the future */ 278 if (PVR_VER(pvr) & 0x8000) { 279 switch (PVR_VER(pvr)) { 280 case 0x8000: /* 7441/7450/7451, Voyager */ 281 case 0x8001: /* 7445/7455, Apollo 6 */ 282 case 0x8002: /* 7447/7457, Apollo 7 */ 283 case 0x8003: /* 7447A, Apollo 7 PM */ 284 case 0x8004: /* 7448, Apollo 8 */ 285 case 0x800c: /* 7410, Nitro */ 286 maj = ((pvr >> 8) & 0xF); 287 min = PVR_MIN(pvr); 288 break; 289 default: /* e500/book-e */ 290 maj = PVR_MAJ(pvr); 291 min = PVR_MIN(pvr); 292 break; 293 } 294 } else { 295 switch (PVR_VER(pvr)) { 296 case 0x0020: /* 403 family */ 297 maj = PVR_MAJ(pvr) + 1; 298 min = PVR_MIN(pvr); 299 break; 300 case 0x1008: /* 740P/750P ?? */ 301 maj = ((pvr >> 8) & 0xFF) - 1; 302 min = pvr & 0xFF; 303 break; 304 default: 305 maj = (pvr >> 8) & 0xFF; 306 min = pvr & 0xFF; 307 break; 308 } 309 } 310 311 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", 312 maj, min, PVR_VER(pvr), PVR_REV(pvr)); 313 314 #ifdef CONFIG_PPC32 315 seq_printf(m, "bogomips\t: %lu.%02lu\n", 316 loops_per_jiffy / (500000/HZ), 317 (loops_per_jiffy / (5000/HZ)) % 100); 318 #endif 319 320 #ifdef CONFIG_SMP 321 seq_printf(m, "\n"); 322 #endif 323 324 preempt_enable(); 325 326 /* If this is the last cpu, print the summary */ 327 if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) 328 show_cpuinfo_summary(m); 329 330 return 0; 331 } 332 333 static void *c_start(struct seq_file *m, loff_t *pos) 334 { 335 if (*pos == 0) /* just in case, cpu 0 is not the first */ 336 *pos = cpumask_first(cpu_online_mask); 337 else 338 *pos = cpumask_next(*pos - 1, cpu_online_mask); 339 if ((*pos) < nr_cpu_ids) 340 return (void *)(unsigned long)(*pos + 1); 341 return NULL; 342 } 343 344 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 345 { 346 (*pos)++; 347 return c_start(m, pos); 348 } 349 350 static void c_stop(struct seq_file *m, void *v) 351 { 352 } 353 354 const struct seq_operations cpuinfo_op = { 355 .start =c_start, 356 .next = c_next, 357 .stop = c_stop, 358 .show = show_cpuinfo, 359 }; 360 361 void __init check_for_initrd(void) 362 { 363 #ifdef CONFIG_BLK_DEV_INITRD 364 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", 365 initrd_start, initrd_end); 366 367 /* If we were passed an initrd, set the ROOT_DEV properly if the values 368 * look sensible. If not, clear initrd reference. 369 */ 370 if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && 371 initrd_end > initrd_start) 372 ROOT_DEV = Root_RAM0; 373 else 374 initrd_start = initrd_end = 0; 375 376 if (initrd_start) 377 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 378 379 DBG(" <- check_for_initrd()\n"); 380 #endif /* CONFIG_BLK_DEV_INITRD */ 381 } 382 383 #ifdef CONFIG_SMP 384 385 int threads_per_core, threads_shift; 386 cpumask_t threads_core_mask; 387 EXPORT_SYMBOL_GPL(threads_per_core); 388 EXPORT_SYMBOL_GPL(threads_shift); 389 EXPORT_SYMBOL_GPL(threads_core_mask); 390 391 static void __init cpu_init_thread_core_maps(int tpc) 392 { 393 int i; 394 395 threads_per_core = tpc; 396 cpumask_clear(&threads_core_mask); 397 398 /* This implementation only supports power of 2 number of threads 399 * for simplicity and performance 400 */ 401 threads_shift = ilog2(tpc); 402 BUG_ON(tpc != (1 << threads_shift)); 403 404 for (i = 0; i < tpc; i++) 405 cpumask_set_cpu(i, &threads_core_mask); 406 407 printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", 408 tpc, tpc > 1 ? "s" : ""); 409 printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); 410 } 411 412 413 /** 414 * setup_cpu_maps - initialize the following cpu maps: 415 * cpu_possible_mask 416 * cpu_present_mask 417 * 418 * Having the possible map set up early allows us to restrict allocations 419 * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. 420 * 421 * We do not initialize the online map here; cpus set their own bits in 422 * cpu_online_mask as they come up. 423 * 424 * This function is valid only for Open Firmware systems. finish_device_tree 425 * must be called before using this. 426 * 427 * While we're here, we may as well set the "physical" cpu ids in the paca. 428 * 429 * NOTE: This must match the parsing done in early_init_dt_scan_cpus. 430 */ 431 void __init smp_setup_cpu_maps(void) 432 { 433 struct device_node *dn = NULL; 434 int cpu = 0; 435 int nthreads = 1; 436 437 DBG("smp_setup_cpu_maps()\n"); 438 439 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) { 440 const __be32 *intserv; 441 __be32 cpu_be; 442 int j, len; 443 444 DBG(" * %s...\n", dn->full_name); 445 446 intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", 447 &len); 448 if (intserv) { 449 nthreads = len / sizeof(int); 450 DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", 451 nthreads); 452 } else { 453 DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); 454 intserv = of_get_property(dn, "reg", NULL); 455 if (!intserv) { 456 cpu_be = cpu_to_be32(cpu); 457 intserv = &cpu_be; /* assume logical == phys */ 458 } 459 } 460 461 for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { 462 DBG(" thread %d -> cpu %d (hard id %d)\n", 463 j, cpu, be32_to_cpu(intserv[j])); 464 set_cpu_present(cpu, true); 465 set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j])); 466 set_cpu_possible(cpu, true); 467 cpu++; 468 } 469 } 470 471 /* If no SMT supported, nthreads is forced to 1 */ 472 if (!cpu_has_feature(CPU_FTR_SMT)) { 473 DBG(" SMT disabled ! nthreads forced to 1\n"); 474 nthreads = 1; 475 } 476 477 #ifdef CONFIG_PPC64 478 /* 479 * On pSeries LPAR, we need to know how many cpus 480 * could possibly be added to this partition. 481 */ 482 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && 483 (dn = of_find_node_by_path("/rtas"))) { 484 int num_addr_cell, num_size_cell, maxcpus; 485 const __be32 *ireg; 486 487 num_addr_cell = of_n_addr_cells(dn); 488 num_size_cell = of_n_size_cells(dn); 489 490 ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); 491 492 if (!ireg) 493 goto out; 494 495 maxcpus = be32_to_cpup(ireg + num_addr_cell + num_size_cell); 496 497 /* Double maxcpus for processors which have SMT capability */ 498 if (cpu_has_feature(CPU_FTR_SMT)) 499 maxcpus *= nthreads; 500 501 if (maxcpus > nr_cpu_ids) { 502 printk(KERN_WARNING 503 "Partition configured for %d cpus, " 504 "operating system maximum is %d.\n", 505 maxcpus, nr_cpu_ids); 506 maxcpus = nr_cpu_ids; 507 } else 508 printk(KERN_INFO "Partition configured for %d cpus.\n", 509 maxcpus); 510 511 for (cpu = 0; cpu < maxcpus; cpu++) 512 set_cpu_possible(cpu, true); 513 out: 514 of_node_put(dn); 515 } 516 vdso_data->processorCount = num_present_cpus(); 517 #endif /* CONFIG_PPC64 */ 518 519 /* Initialize CPU <=> thread mapping/ 520 * 521 * WARNING: We assume that the number of threads is the same for 522 * every CPU in the system. If that is not the case, then some code 523 * here will have to be reworked 524 */ 525 cpu_init_thread_core_maps(nthreads); 526 527 /* Now that possible cpus are set, set nr_cpu_ids for later use */ 528 setup_nr_cpu_ids(); 529 530 free_unused_pacas(); 531 } 532 #endif /* CONFIG_SMP */ 533 534 #ifdef CONFIG_PCSPKR_PLATFORM 535 static __init int add_pcspkr(void) 536 { 537 struct device_node *np; 538 struct platform_device *pd; 539 int ret; 540 541 np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); 542 of_node_put(np); 543 if (!np) 544 return -ENODEV; 545 546 pd = platform_device_alloc("pcspkr", -1); 547 if (!pd) 548 return -ENOMEM; 549 550 ret = platform_device_add(pd); 551 if (ret) 552 platform_device_put(pd); 553 554 return ret; 555 } 556 device_initcall(add_pcspkr); 557 #endif /* CONFIG_PCSPKR_PLATFORM */ 558 559 void probe_machine(void) 560 { 561 extern struct machdep_calls __machine_desc_start; 562 extern struct machdep_calls __machine_desc_end; 563 564 /* 565 * Iterate all ppc_md structures until we find the proper 566 * one for the current machine type 567 */ 568 DBG("Probing machine type ...\n"); 569 570 for (machine_id = &__machine_desc_start; 571 machine_id < &__machine_desc_end; 572 machine_id++) { 573 DBG(" %s ...", machine_id->name); 574 memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); 575 if (ppc_md.probe()) { 576 DBG(" match !\n"); 577 break; 578 } 579 DBG("\n"); 580 } 581 /* What can we do if we didn't find ? */ 582 if (machine_id >= &__machine_desc_end) { 583 DBG("No suitable machine found !\n"); 584 for (;;); 585 } 586 587 printk(KERN_INFO "Using %s machine description\n", ppc_md.name); 588 } 589 590 /* Match a class of boards, not a specific device configuration. */ 591 int check_legacy_ioport(unsigned long base_port) 592 { 593 struct device_node *parent, *np = NULL; 594 int ret = -ENODEV; 595 596 switch(base_port) { 597 case I8042_DATA_REG: 598 if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) 599 np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); 600 if (np) { 601 parent = of_get_parent(np); 602 603 of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); 604 if (!of_i8042_kbd_irq) 605 of_i8042_kbd_irq = 1; 606 607 of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); 608 if (!of_i8042_aux_irq) 609 of_i8042_aux_irq = 12; 610 611 of_node_put(np); 612 np = parent; 613 break; 614 } 615 np = of_find_node_by_type(NULL, "8042"); 616 /* Pegasos has no device_type on its 8042 node, look for the 617 * name instead */ 618 if (!np) 619 np = of_find_node_by_name(NULL, "8042"); 620 if (np) { 621 of_i8042_kbd_irq = 1; 622 of_i8042_aux_irq = 12; 623 } 624 break; 625 case FDC_BASE: /* FDC1 */ 626 np = of_find_node_by_type(NULL, "fdc"); 627 break; 628 default: 629 /* ipmi is supposed to fail here */ 630 break; 631 } 632 if (!np) 633 return ret; 634 parent = of_get_parent(np); 635 if (parent) { 636 if (strcmp(parent->type, "isa") == 0) 637 ret = 0; 638 of_node_put(parent); 639 } 640 of_node_put(np); 641 return ret; 642 } 643 EXPORT_SYMBOL(check_legacy_ioport); 644 645 static int ppc_panic_event(struct notifier_block *this, 646 unsigned long event, void *ptr) 647 { 648 /* 649 * If firmware-assisted dump has been registered then trigger 650 * firmware-assisted dump and let firmware handle everything else. 651 */ 652 crash_fadump(NULL, ptr); 653 ppc_md.panic(ptr); /* May not return */ 654 return NOTIFY_DONE; 655 } 656 657 static struct notifier_block ppc_panic_block = { 658 .notifier_call = ppc_panic_event, 659 .priority = INT_MIN /* may not return; must be done last */ 660 }; 661 662 void __init setup_panic(void) 663 { 664 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); 665 } 666 667 #ifdef CONFIG_CHECK_CACHE_COHERENCY 668 /* 669 * For platforms that have configurable cache-coherency. This function 670 * checks that the cache coherency setting of the kernel matches the setting 671 * left by the firmware, as indicated in the device tree. Since a mismatch 672 * will eventually result in DMA failures, we print * and error and call 673 * BUG() in that case. 674 */ 675 676 #ifdef CONFIG_NOT_COHERENT_CACHE 677 #define KERNEL_COHERENCY 0 678 #else 679 #define KERNEL_COHERENCY 1 680 #endif 681 682 static int __init check_cache_coherency(void) 683 { 684 struct device_node *np; 685 const void *prop; 686 int devtree_coherency; 687 688 np = of_find_node_by_path("/"); 689 prop = of_get_property(np, "coherency-off", NULL); 690 of_node_put(np); 691 692 devtree_coherency = prop ? 0 : 1; 693 694 if (devtree_coherency != KERNEL_COHERENCY) { 695 printk(KERN_ERR 696 "kernel coherency:%s != device tree_coherency:%s\n", 697 KERNEL_COHERENCY ? "on" : "off", 698 devtree_coherency ? "on" : "off"); 699 BUG(); 700 } 701 702 return 0; 703 } 704 705 late_initcall(check_cache_coherency); 706 #endif /* CONFIG_CHECK_CACHE_COHERENCY */ 707 708 #ifdef CONFIG_DEBUG_FS 709 struct dentry *powerpc_debugfs_root; 710 EXPORT_SYMBOL(powerpc_debugfs_root); 711 712 static int powerpc_debugfs_init(void) 713 { 714 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); 715 716 return powerpc_debugfs_root == NULL; 717 } 718 arch_initcall(powerpc_debugfs_init); 719 #endif 720 721 #ifdef CONFIG_BOOKE_WDT 722 extern u32 booke_wdt_enabled; 723 extern u32 booke_wdt_period; 724 725 /* Checks wdt=x and wdt_period=xx command-line option */ 726 notrace int __init early_parse_wdt(char *p) 727 { 728 if (p && strncmp(p, "0", 1) != 0) 729 booke_wdt_enabled = 1; 730 731 return 0; 732 } 733 early_param("wdt", early_parse_wdt); 734 735 int __init early_parse_wdt_period(char *p) 736 { 737 unsigned long ret; 738 if (p) { 739 if (!kstrtol(p, 0, &ret)) 740 booke_wdt_period = ret; 741 } 742 743 return 0; 744 } 745 early_param("wdt_period", early_parse_wdt_period); 746 #endif /* CONFIG_BOOKE_WDT */ 747 748 void ppc_printk_progress(char *s, unsigned short hex) 749 { 750 pr_info("%s\n", s); 751 } 752 753 void arch_setup_pdev_archdata(struct platform_device *pdev) 754 { 755 pdev->archdata.dma_mask = DMA_BIT_MASK(32); 756 pdev->dev.dma_mask = &pdev->archdata.dma_mask; 757 set_dma_ops(&pdev->dev, &dma_direct_ops); 758 } 759