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 unsigned long klimit = (unsigned long) _end; 80 81 char cmd_line[COMMAND_LINE_SIZE]; 82 83 /* 84 * This still seems to be needed... -- paulus 85 */ 86 struct screen_info screen_info = { 87 .orig_x = 0, 88 .orig_y = 25, 89 .orig_video_cols = 80, 90 .orig_video_lines = 25, 91 .orig_video_isVGA = 1, 92 .orig_video_points = 16 93 }; 94 95 /* Variables required to store legacy IO irq routing */ 96 int of_i8042_kbd_irq; 97 EXPORT_SYMBOL_GPL(of_i8042_kbd_irq); 98 int of_i8042_aux_irq; 99 EXPORT_SYMBOL_GPL(of_i8042_aux_irq); 100 101 #ifdef __DO_IRQ_CANON 102 /* XXX should go elsewhere eventually */ 103 int ppc_do_canonicalize_irqs; 104 EXPORT_SYMBOL(ppc_do_canonicalize_irqs); 105 #endif 106 107 /* also used by kexec */ 108 void machine_shutdown(void) 109 { 110 #ifdef CONFIG_FA_DUMP 111 /* 112 * if fadump is active, cleanup the fadump registration before we 113 * shutdown. 114 */ 115 fadump_cleanup(); 116 #endif 117 118 if (ppc_md.machine_shutdown) 119 ppc_md.machine_shutdown(); 120 } 121 122 void machine_restart(char *cmd) 123 { 124 machine_shutdown(); 125 if (ppc_md.restart) 126 ppc_md.restart(cmd); 127 #ifdef CONFIG_SMP 128 smp_send_stop(); 129 #endif 130 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 131 local_irq_disable(); 132 while (1) ; 133 } 134 135 void machine_power_off(void) 136 { 137 machine_shutdown(); 138 if (ppc_md.power_off) 139 ppc_md.power_off(); 140 #ifdef CONFIG_SMP 141 smp_send_stop(); 142 #endif 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) = machine_power_off; 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 #ifdef CONFIG_SMP 159 smp_send_stop(); 160 #endif 161 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 162 local_irq_disable(); 163 while (1) ; 164 } 165 166 167 #ifdef CONFIG_TAU 168 extern u32 cpu_temp(unsigned long cpu); 169 extern u32 cpu_temp_both(unsigned long cpu); 170 #endif /* CONFIG_TAU */ 171 172 #ifdef CONFIG_SMP 173 DEFINE_PER_CPU(unsigned int, cpu_pvr); 174 #endif 175 176 static void show_cpuinfo_summary(struct seq_file *m) 177 { 178 struct device_node *root; 179 const char *model = NULL; 180 #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) 181 unsigned long bogosum = 0; 182 int i; 183 for_each_online_cpu(i) 184 bogosum += loops_per_jiffy; 185 seq_printf(m, "total bogomips\t: %lu.%02lu\n", 186 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); 187 #endif /* CONFIG_SMP && CONFIG_PPC32 */ 188 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); 189 if (ppc_md.name) 190 seq_printf(m, "platform\t: %s\n", ppc_md.name); 191 root = of_find_node_by_path("/"); 192 if (root) 193 model = of_get_property(root, "model", NULL); 194 if (model) 195 seq_printf(m, "model\t\t: %s\n", model); 196 of_node_put(root); 197 198 if (ppc_md.show_cpuinfo != NULL) 199 ppc_md.show_cpuinfo(m); 200 201 #ifdef CONFIG_PPC32 202 /* Display the amount of memory */ 203 seq_printf(m, "Memory\t\t: %d MB\n", 204 (unsigned int)(total_memory / (1024 * 1024))); 205 #endif 206 } 207 208 static int show_cpuinfo(struct seq_file *m, void *v) 209 { 210 unsigned long cpu_id = (unsigned long)v - 1; 211 unsigned int pvr; 212 unsigned short maj; 213 unsigned short min; 214 215 /* We only show online cpus: disable preempt (overzealous, I 216 * knew) to prevent cpu going down. */ 217 preempt_disable(); 218 if (!cpu_online(cpu_id)) { 219 preempt_enable(); 220 return 0; 221 } 222 223 #ifdef CONFIG_SMP 224 pvr = per_cpu(cpu_pvr, cpu_id); 225 #else 226 pvr = mfspr(SPRN_PVR); 227 #endif 228 maj = (pvr >> 8) & 0xFF; 229 min = pvr & 0xFF; 230 231 seq_printf(m, "processor\t: %lu\n", cpu_id); 232 seq_printf(m, "cpu\t\t: "); 233 234 if (cur_cpu_spec->pvr_mask) 235 seq_printf(m, "%s", cur_cpu_spec->cpu_name); 236 else 237 seq_printf(m, "unknown (%08x)", pvr); 238 239 #ifdef CONFIG_ALTIVEC 240 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 241 seq_printf(m, ", altivec supported"); 242 #endif /* CONFIG_ALTIVEC */ 243 244 seq_printf(m, "\n"); 245 246 #ifdef CONFIG_TAU 247 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { 248 #ifdef CONFIG_TAU_AVERAGE 249 /* more straightforward, but potentially misleading */ 250 seq_printf(m, "temperature \t: %u C (uncalibrated)\n", 251 cpu_temp(cpu_id)); 252 #else 253 /* show the actual temp sensor range */ 254 u32 temp; 255 temp = cpu_temp_both(cpu_id); 256 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", 257 temp & 0xff, temp >> 16); 258 #endif 259 } 260 #endif /* CONFIG_TAU */ 261 262 /* 263 * Assume here that all clock rates are the same in a 264 * smp system. -- Cort 265 */ 266 if (ppc_proc_freq) 267 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", 268 ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); 269 270 if (ppc_md.show_percpuinfo != NULL) 271 ppc_md.show_percpuinfo(m, cpu_id); 272 273 /* If we are a Freescale core do a simple check so 274 * we dont have to keep adding cases in the future */ 275 if (PVR_VER(pvr) & 0x8000) { 276 switch (PVR_VER(pvr)) { 277 case 0x8000: /* 7441/7450/7451, Voyager */ 278 case 0x8001: /* 7445/7455, Apollo 6 */ 279 case 0x8002: /* 7447/7457, Apollo 7 */ 280 case 0x8003: /* 7447A, Apollo 7 PM */ 281 case 0x8004: /* 7448, Apollo 8 */ 282 case 0x800c: /* 7410, Nitro */ 283 maj = ((pvr >> 8) & 0xF); 284 min = PVR_MIN(pvr); 285 break; 286 default: /* e500/book-e */ 287 maj = PVR_MAJ(pvr); 288 min = PVR_MIN(pvr); 289 break; 290 } 291 } else { 292 switch (PVR_VER(pvr)) { 293 case 0x0020: /* 403 family */ 294 maj = PVR_MAJ(pvr) + 1; 295 min = PVR_MIN(pvr); 296 break; 297 case 0x1008: /* 740P/750P ?? */ 298 maj = ((pvr >> 8) & 0xFF) - 1; 299 min = pvr & 0xFF; 300 break; 301 default: 302 maj = (pvr >> 8) & 0xFF; 303 min = pvr & 0xFF; 304 break; 305 } 306 } 307 308 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", 309 maj, min, PVR_VER(pvr), PVR_REV(pvr)); 310 311 #ifdef CONFIG_PPC32 312 seq_printf(m, "bogomips\t: %lu.%02lu\n", 313 loops_per_jiffy / (500000/HZ), 314 (loops_per_jiffy / (5000/HZ)) % 100); 315 #endif 316 317 #ifdef CONFIG_SMP 318 seq_printf(m, "\n"); 319 #endif 320 321 preempt_enable(); 322 323 /* If this is the last cpu, print the summary */ 324 if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) 325 show_cpuinfo_summary(m); 326 327 return 0; 328 } 329 330 static void *c_start(struct seq_file *m, loff_t *pos) 331 { 332 if (*pos == 0) /* just in case, cpu 0 is not the first */ 333 *pos = cpumask_first(cpu_online_mask); 334 else 335 *pos = cpumask_next(*pos - 1, cpu_online_mask); 336 if ((*pos) < nr_cpu_ids) 337 return (void *)(unsigned long)(*pos + 1); 338 return NULL; 339 } 340 341 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 342 { 343 (*pos)++; 344 return c_start(m, pos); 345 } 346 347 static void c_stop(struct seq_file *m, void *v) 348 { 349 } 350 351 const struct seq_operations cpuinfo_op = { 352 .start =c_start, 353 .next = c_next, 354 .stop = c_stop, 355 .show = show_cpuinfo, 356 }; 357 358 void __init check_for_initrd(void) 359 { 360 #ifdef CONFIG_BLK_DEV_INITRD 361 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", 362 initrd_start, initrd_end); 363 364 /* If we were passed an initrd, set the ROOT_DEV properly if the values 365 * look sensible. If not, clear initrd reference. 366 */ 367 if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && 368 initrd_end > initrd_start) 369 ROOT_DEV = Root_RAM0; 370 else 371 initrd_start = initrd_end = 0; 372 373 if (initrd_start) 374 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 375 376 DBG(" <- check_for_initrd()\n"); 377 #endif /* CONFIG_BLK_DEV_INITRD */ 378 } 379 380 #ifdef CONFIG_SMP 381 382 int threads_per_core, threads_shift; 383 cpumask_t threads_core_mask; 384 EXPORT_SYMBOL_GPL(threads_per_core); 385 EXPORT_SYMBOL_GPL(threads_shift); 386 EXPORT_SYMBOL_GPL(threads_core_mask); 387 388 static void __init cpu_init_thread_core_maps(int tpc) 389 { 390 int i; 391 392 threads_per_core = tpc; 393 cpumask_clear(&threads_core_mask); 394 395 /* This implementation only supports power of 2 number of threads 396 * for simplicity and performance 397 */ 398 threads_shift = ilog2(tpc); 399 BUG_ON(tpc != (1 << threads_shift)); 400 401 for (i = 0; i < tpc; i++) 402 cpumask_set_cpu(i, &threads_core_mask); 403 404 printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", 405 tpc, tpc > 1 ? "s" : ""); 406 printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); 407 } 408 409 410 /** 411 * setup_cpu_maps - initialize the following cpu maps: 412 * cpu_possible_mask 413 * cpu_present_mask 414 * 415 * Having the possible map set up early allows us to restrict allocations 416 * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. 417 * 418 * We do not initialize the online map here; cpus set their own bits in 419 * cpu_online_mask as they come up. 420 * 421 * This function is valid only for Open Firmware systems. finish_device_tree 422 * must be called before using this. 423 * 424 * While we're here, we may as well set the "physical" cpu ids in the paca. 425 * 426 * NOTE: This must match the parsing done in early_init_dt_scan_cpus. 427 */ 428 void __init smp_setup_cpu_maps(void) 429 { 430 struct device_node *dn = NULL; 431 int cpu = 0; 432 int nthreads = 1; 433 434 DBG("smp_setup_cpu_maps()\n"); 435 436 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) { 437 const __be32 *intserv; 438 __be32 cpu_be; 439 int j, len; 440 441 DBG(" * %s...\n", dn->full_name); 442 443 intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", 444 &len); 445 if (intserv) { 446 nthreads = len / sizeof(int); 447 DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", 448 nthreads); 449 } else { 450 DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); 451 intserv = of_get_property(dn, "reg", NULL); 452 if (!intserv) { 453 cpu_be = cpu_to_be32(cpu); 454 intserv = &cpu_be; /* assume logical == phys */ 455 } 456 } 457 458 for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { 459 DBG(" thread %d -> cpu %d (hard id %d)\n", 460 j, cpu, be32_to_cpu(intserv[j])); 461 set_cpu_present(cpu, true); 462 set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j])); 463 set_cpu_possible(cpu, true); 464 cpu++; 465 } 466 } 467 468 /* If no SMT supported, nthreads is forced to 1 */ 469 if (!cpu_has_feature(CPU_FTR_SMT)) { 470 DBG(" SMT disabled ! nthreads forced to 1\n"); 471 nthreads = 1; 472 } 473 474 #ifdef CONFIG_PPC64 475 /* 476 * On pSeries LPAR, we need to know how many cpus 477 * could possibly be added to this partition. 478 */ 479 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && 480 (dn = of_find_node_by_path("/rtas"))) { 481 int num_addr_cell, num_size_cell, maxcpus; 482 const __be32 *ireg; 483 484 num_addr_cell = of_n_addr_cells(dn); 485 num_size_cell = of_n_size_cells(dn); 486 487 ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); 488 489 if (!ireg) 490 goto out; 491 492 maxcpus = be32_to_cpup(ireg + num_addr_cell + num_size_cell); 493 494 /* Double maxcpus for processors which have SMT capability */ 495 if (cpu_has_feature(CPU_FTR_SMT)) 496 maxcpus *= nthreads; 497 498 if (maxcpus > nr_cpu_ids) { 499 printk(KERN_WARNING 500 "Partition configured for %d cpus, " 501 "operating system maximum is %d.\n", 502 maxcpus, nr_cpu_ids); 503 maxcpus = nr_cpu_ids; 504 } else 505 printk(KERN_INFO "Partition configured for %d cpus.\n", 506 maxcpus); 507 508 for (cpu = 0; cpu < maxcpus; cpu++) 509 set_cpu_possible(cpu, true); 510 out: 511 of_node_put(dn); 512 } 513 vdso_data->processorCount = num_present_cpus(); 514 #endif /* CONFIG_PPC64 */ 515 516 /* Initialize CPU <=> thread mapping/ 517 * 518 * WARNING: We assume that the number of threads is the same for 519 * every CPU in the system. If that is not the case, then some code 520 * here will have to be reworked 521 */ 522 cpu_init_thread_core_maps(nthreads); 523 524 /* Now that possible cpus are set, set nr_cpu_ids for later use */ 525 setup_nr_cpu_ids(); 526 527 free_unused_pacas(); 528 } 529 #endif /* CONFIG_SMP */ 530 531 #ifdef CONFIG_PCSPKR_PLATFORM 532 static __init int add_pcspkr(void) 533 { 534 struct device_node *np; 535 struct platform_device *pd; 536 int ret; 537 538 np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); 539 of_node_put(np); 540 if (!np) 541 return -ENODEV; 542 543 pd = platform_device_alloc("pcspkr", -1); 544 if (!pd) 545 return -ENOMEM; 546 547 ret = platform_device_add(pd); 548 if (ret) 549 platform_device_put(pd); 550 551 return ret; 552 } 553 device_initcall(add_pcspkr); 554 #endif /* CONFIG_PCSPKR_PLATFORM */ 555 556 void probe_machine(void) 557 { 558 extern struct machdep_calls __machine_desc_start; 559 extern struct machdep_calls __machine_desc_end; 560 561 /* 562 * Iterate all ppc_md structures until we find the proper 563 * one for the current machine type 564 */ 565 DBG("Probing machine type ...\n"); 566 567 for (machine_id = &__machine_desc_start; 568 machine_id < &__machine_desc_end; 569 machine_id++) { 570 DBG(" %s ...", machine_id->name); 571 memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); 572 if (ppc_md.probe()) { 573 DBG(" match !\n"); 574 break; 575 } 576 DBG("\n"); 577 } 578 /* What can we do if we didn't find ? */ 579 if (machine_id >= &__machine_desc_end) { 580 DBG("No suitable machine found !\n"); 581 for (;;); 582 } 583 584 printk(KERN_INFO "Using %s machine description\n", ppc_md.name); 585 } 586 587 /* Match a class of boards, not a specific device configuration. */ 588 int check_legacy_ioport(unsigned long base_port) 589 { 590 struct device_node *parent, *np = NULL; 591 int ret = -ENODEV; 592 593 switch(base_port) { 594 case I8042_DATA_REG: 595 if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) 596 np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); 597 if (np) { 598 parent = of_get_parent(np); 599 600 of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); 601 if (!of_i8042_kbd_irq) 602 of_i8042_kbd_irq = 1; 603 604 of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); 605 if (!of_i8042_aux_irq) 606 of_i8042_aux_irq = 12; 607 608 of_node_put(np); 609 np = parent; 610 break; 611 } 612 np = of_find_node_by_type(NULL, "8042"); 613 /* Pegasos has no device_type on its 8042 node, look for the 614 * name instead */ 615 if (!np) 616 np = of_find_node_by_name(NULL, "8042"); 617 if (np) { 618 of_i8042_kbd_irq = 1; 619 of_i8042_aux_irq = 12; 620 } 621 break; 622 case FDC_BASE: /* FDC1 */ 623 np = of_find_node_by_type(NULL, "fdc"); 624 break; 625 default: 626 /* ipmi is supposed to fail here */ 627 break; 628 } 629 if (!np) 630 return ret; 631 parent = of_get_parent(np); 632 if (parent) { 633 if (strcmp(parent->type, "isa") == 0) 634 ret = 0; 635 of_node_put(parent); 636 } 637 of_node_put(np); 638 return ret; 639 } 640 EXPORT_SYMBOL(check_legacy_ioport); 641 642 static int ppc_panic_event(struct notifier_block *this, 643 unsigned long event, void *ptr) 644 { 645 /* 646 * If firmware-assisted dump has been registered then trigger 647 * firmware-assisted dump and let firmware handle everything else. 648 */ 649 crash_fadump(NULL, ptr); 650 ppc_md.panic(ptr); /* May not return */ 651 return NOTIFY_DONE; 652 } 653 654 static struct notifier_block ppc_panic_block = { 655 .notifier_call = ppc_panic_event, 656 .priority = INT_MIN /* may not return; must be done last */ 657 }; 658 659 void __init setup_panic(void) 660 { 661 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); 662 } 663 664 #ifdef CONFIG_CHECK_CACHE_COHERENCY 665 /* 666 * For platforms that have configurable cache-coherency. This function 667 * checks that the cache coherency setting of the kernel matches the setting 668 * left by the firmware, as indicated in the device tree. Since a mismatch 669 * will eventually result in DMA failures, we print * and error and call 670 * BUG() in that case. 671 */ 672 673 #ifdef CONFIG_NOT_COHERENT_CACHE 674 #define KERNEL_COHERENCY 0 675 #else 676 #define KERNEL_COHERENCY 1 677 #endif 678 679 static int __init check_cache_coherency(void) 680 { 681 struct device_node *np; 682 const void *prop; 683 int devtree_coherency; 684 685 np = of_find_node_by_path("/"); 686 prop = of_get_property(np, "coherency-off", NULL); 687 of_node_put(np); 688 689 devtree_coherency = prop ? 0 : 1; 690 691 if (devtree_coherency != KERNEL_COHERENCY) { 692 printk(KERN_ERR 693 "kernel coherency:%s != device tree_coherency:%s\n", 694 KERNEL_COHERENCY ? "on" : "off", 695 devtree_coherency ? "on" : "off"); 696 BUG(); 697 } 698 699 return 0; 700 } 701 702 late_initcall(check_cache_coherency); 703 #endif /* CONFIG_CHECK_CACHE_COHERENCY */ 704 705 #ifdef CONFIG_DEBUG_FS 706 struct dentry *powerpc_debugfs_root; 707 EXPORT_SYMBOL(powerpc_debugfs_root); 708 709 static int powerpc_debugfs_init(void) 710 { 711 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); 712 713 return powerpc_debugfs_root == NULL; 714 } 715 arch_initcall(powerpc_debugfs_init); 716 #endif 717 718 #ifdef CONFIG_BOOKE_WDT 719 extern u32 booke_wdt_enabled; 720 extern u32 booke_wdt_period; 721 722 /* Checks wdt=x and wdt_period=xx command-line option */ 723 notrace int __init early_parse_wdt(char *p) 724 { 725 if (p && strncmp(p, "0", 1) != 0) 726 booke_wdt_enabled = 1; 727 728 return 0; 729 } 730 early_param("wdt", early_parse_wdt); 731 732 int __init early_parse_wdt_period(char *p) 733 { 734 unsigned long ret; 735 if (p) { 736 if (!kstrtol(p, 0, &ret)) 737 booke_wdt_period = ret; 738 } 739 740 return 0; 741 } 742 early_param("wdt_period", early_parse_wdt_period); 743 #endif /* CONFIG_BOOKE_WDT */ 744 745 void ppc_printk_progress(char *s, unsigned short hex) 746 { 747 pr_info("%s\n", s); 748 } 749 750 void arch_setup_pdev_archdata(struct platform_device *pdev) 751 { 752 pdev->archdata.dma_mask = DMA_BIT_MASK(32); 753 pdev->dev.dma_mask = &pdev->archdata.dma_mask; 754 set_dma_ops(&pdev->dev, &dma_direct_ops); 755 } 756