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 #include "setup.h" 66 67 #ifdef DEBUG 68 #include <asm/udbg.h> 69 #define DBG(fmt...) udbg_printf(fmt) 70 #else 71 #define DBG(fmt...) 72 #endif 73 74 /* The main machine-dep calls structure 75 */ 76 struct machdep_calls ppc_md; 77 EXPORT_SYMBOL(ppc_md); 78 struct machdep_calls *machine_id; 79 EXPORT_SYMBOL(machine_id); 80 81 unsigned long klimit = (unsigned long) _end; 82 83 char cmd_line[COMMAND_LINE_SIZE]; 84 85 /* 86 * This still seems to be needed... -- paulus 87 */ 88 struct screen_info screen_info = { 89 .orig_x = 0, 90 .orig_y = 25, 91 .orig_video_cols = 80, 92 .orig_video_lines = 25, 93 .orig_video_isVGA = 1, 94 .orig_video_points = 16 95 }; 96 97 /* Variables required to store legacy IO irq routing */ 98 int of_i8042_kbd_irq; 99 EXPORT_SYMBOL_GPL(of_i8042_kbd_irq); 100 int of_i8042_aux_irq; 101 EXPORT_SYMBOL_GPL(of_i8042_aux_irq); 102 103 #ifdef __DO_IRQ_CANON 104 /* XXX should go elsewhere eventually */ 105 int ppc_do_canonicalize_irqs; 106 EXPORT_SYMBOL(ppc_do_canonicalize_irqs); 107 #endif 108 109 /* also used by kexec */ 110 void machine_shutdown(void) 111 { 112 #ifdef CONFIG_FA_DUMP 113 /* 114 * if fadump is active, cleanup the fadump registration before we 115 * shutdown. 116 */ 117 fadump_cleanup(); 118 #endif 119 120 if (ppc_md.machine_shutdown) 121 ppc_md.machine_shutdown(); 122 } 123 124 void machine_restart(char *cmd) 125 { 126 machine_shutdown(); 127 if (ppc_md.restart) 128 ppc_md.restart(cmd); 129 #ifdef CONFIG_SMP 130 smp_send_stop(); 131 #endif 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 (ppc_md.power_off) 141 ppc_md.power_off(); 142 #ifdef CONFIG_SMP 143 smp_send_stop(); 144 #endif 145 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 146 local_irq_disable(); 147 while (1) ; 148 } 149 /* Used by the G5 thermal driver */ 150 EXPORT_SYMBOL_GPL(machine_power_off); 151 152 void (*pm_power_off)(void) = machine_power_off; 153 EXPORT_SYMBOL_GPL(pm_power_off); 154 155 void machine_halt(void) 156 { 157 machine_shutdown(); 158 if (ppc_md.halt) 159 ppc_md.halt(); 160 #ifdef CONFIG_SMP 161 smp_send_stop(); 162 #endif 163 printk(KERN_EMERG "System Halted, OK to turn off power\n"); 164 local_irq_disable(); 165 while (1) ; 166 } 167 168 169 #ifdef CONFIG_TAU 170 extern u32 cpu_temp(unsigned long cpu); 171 extern u32 cpu_temp_both(unsigned long cpu); 172 #endif /* CONFIG_TAU */ 173 174 #ifdef CONFIG_SMP 175 DEFINE_PER_CPU(unsigned int, cpu_pvr); 176 #endif 177 178 static void show_cpuinfo_summary(struct seq_file *m) 179 { 180 struct device_node *root; 181 const char *model = NULL; 182 #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) 183 unsigned long bogosum = 0; 184 int i; 185 for_each_online_cpu(i) 186 bogosum += loops_per_jiffy; 187 seq_printf(m, "total bogomips\t: %lu.%02lu\n", 188 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); 189 #endif /* CONFIG_SMP && CONFIG_PPC32 */ 190 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); 191 if (ppc_md.name) 192 seq_printf(m, "platform\t: %s\n", ppc_md.name); 193 root = of_find_node_by_path("/"); 194 if (root) 195 model = of_get_property(root, "model", NULL); 196 if (model) 197 seq_printf(m, "model\t\t: %s\n", model); 198 of_node_put(root); 199 200 if (ppc_md.show_cpuinfo != NULL) 201 ppc_md.show_cpuinfo(m); 202 203 #ifdef CONFIG_PPC32 204 /* Display the amount of memory */ 205 seq_printf(m, "Memory\t\t: %d MB\n", 206 (unsigned int)(total_memory / (1024 * 1024))); 207 #endif 208 } 209 210 static int show_cpuinfo(struct seq_file *m, void *v) 211 { 212 unsigned long cpu_id = (unsigned long)v - 1; 213 unsigned int pvr; 214 unsigned short maj; 215 unsigned short min; 216 217 /* We only show online cpus: disable preempt (overzealous, I 218 * knew) to prevent cpu going down. */ 219 preempt_disable(); 220 if (!cpu_online(cpu_id)) { 221 preempt_enable(); 222 return 0; 223 } 224 225 #ifdef CONFIG_SMP 226 pvr = per_cpu(cpu_pvr, cpu_id); 227 #else 228 pvr = mfspr(SPRN_PVR); 229 #endif 230 maj = (pvr >> 8) & 0xFF; 231 min = pvr & 0xFF; 232 233 seq_printf(m, "processor\t: %lu\n", cpu_id); 234 seq_printf(m, "cpu\t\t: "); 235 236 if (cur_cpu_spec->pvr_mask) 237 seq_printf(m, "%s", cur_cpu_spec->cpu_name); 238 else 239 seq_printf(m, "unknown (%08x)", pvr); 240 241 #ifdef CONFIG_ALTIVEC 242 if (cpu_has_feature(CPU_FTR_ALTIVEC)) 243 seq_printf(m, ", altivec supported"); 244 #endif /* CONFIG_ALTIVEC */ 245 246 seq_printf(m, "\n"); 247 248 #ifdef CONFIG_TAU 249 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { 250 #ifdef CONFIG_TAU_AVERAGE 251 /* more straightforward, but potentially misleading */ 252 seq_printf(m, "temperature \t: %u C (uncalibrated)\n", 253 cpu_temp(cpu_id)); 254 #else 255 /* show the actual temp sensor range */ 256 u32 temp; 257 temp = cpu_temp_both(cpu_id); 258 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", 259 temp & 0xff, temp >> 16); 260 #endif 261 } 262 #endif /* CONFIG_TAU */ 263 264 /* 265 * Assume here that all clock rates are the same in a 266 * smp system. -- Cort 267 */ 268 if (ppc_proc_freq) 269 seq_printf(m, "clock\t\t: %lu.%06luMHz\n", 270 ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); 271 272 if (ppc_md.show_percpuinfo != NULL) 273 ppc_md.show_percpuinfo(m, cpu_id); 274 275 /* If we are a Freescale core do a simple check so 276 * we dont have to keep adding cases in the future */ 277 if (PVR_VER(pvr) & 0x8000) { 278 switch (PVR_VER(pvr)) { 279 case 0x8000: /* 7441/7450/7451, Voyager */ 280 case 0x8001: /* 7445/7455, Apollo 6 */ 281 case 0x8002: /* 7447/7457, Apollo 7 */ 282 case 0x8003: /* 7447A, Apollo 7 PM */ 283 case 0x8004: /* 7448, Apollo 8 */ 284 case 0x800c: /* 7410, Nitro */ 285 maj = ((pvr >> 8) & 0xF); 286 min = PVR_MIN(pvr); 287 break; 288 default: /* e500/book-e */ 289 maj = PVR_MAJ(pvr); 290 min = PVR_MIN(pvr); 291 break; 292 } 293 } else { 294 switch (PVR_VER(pvr)) { 295 case 0x0020: /* 403 family */ 296 maj = PVR_MAJ(pvr) + 1; 297 min = PVR_MIN(pvr); 298 break; 299 case 0x1008: /* 740P/750P ?? */ 300 maj = ((pvr >> 8) & 0xFF) - 1; 301 min = pvr & 0xFF; 302 break; 303 default: 304 maj = (pvr >> 8) & 0xFF; 305 min = pvr & 0xFF; 306 break; 307 } 308 } 309 310 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", 311 maj, min, PVR_VER(pvr), PVR_REV(pvr)); 312 313 #ifdef CONFIG_PPC32 314 seq_printf(m, "bogomips\t: %lu.%02lu\n", 315 loops_per_jiffy / (500000/HZ), 316 (loops_per_jiffy / (5000/HZ)) % 100); 317 #endif 318 319 #ifdef CONFIG_SMP 320 seq_printf(m, "\n"); 321 #endif 322 323 preempt_enable(); 324 325 /* If this is the last cpu, print the summary */ 326 if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) 327 show_cpuinfo_summary(m); 328 329 return 0; 330 } 331 332 static void *c_start(struct seq_file *m, loff_t *pos) 333 { 334 if (*pos == 0) /* just in case, cpu 0 is not the first */ 335 *pos = cpumask_first(cpu_online_mask); 336 else 337 *pos = cpumask_next(*pos - 1, cpu_online_mask); 338 if ((*pos) < nr_cpu_ids) 339 return (void *)(unsigned long)(*pos + 1); 340 return NULL; 341 } 342 343 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 344 { 345 (*pos)++; 346 return c_start(m, pos); 347 } 348 349 static void c_stop(struct seq_file *m, void *v) 350 { 351 } 352 353 const struct seq_operations cpuinfo_op = { 354 .start =c_start, 355 .next = c_next, 356 .stop = c_stop, 357 .show = show_cpuinfo, 358 }; 359 360 void __init check_for_initrd(void) 361 { 362 #ifdef CONFIG_BLK_DEV_INITRD 363 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", 364 initrd_start, initrd_end); 365 366 /* If we were passed an initrd, set the ROOT_DEV properly if the values 367 * look sensible. If not, clear initrd reference. 368 */ 369 if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && 370 initrd_end > initrd_start) 371 ROOT_DEV = Root_RAM0; 372 else 373 initrd_start = initrd_end = 0; 374 375 if (initrd_start) 376 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); 377 378 DBG(" <- check_for_initrd()\n"); 379 #endif /* CONFIG_BLK_DEV_INITRD */ 380 } 381 382 #ifdef CONFIG_SMP 383 384 int threads_per_core, threads_shift; 385 cpumask_t threads_core_mask; 386 EXPORT_SYMBOL_GPL(threads_per_core); 387 EXPORT_SYMBOL_GPL(threads_shift); 388 EXPORT_SYMBOL_GPL(threads_core_mask); 389 390 static void __init cpu_init_thread_core_maps(int tpc) 391 { 392 int i; 393 394 threads_per_core = tpc; 395 cpumask_clear(&threads_core_mask); 396 397 /* This implementation only supports power of 2 number of threads 398 * for simplicity and performance 399 */ 400 threads_shift = ilog2(tpc); 401 BUG_ON(tpc != (1 << threads_shift)); 402 403 for (i = 0; i < tpc; i++) 404 cpumask_set_cpu(i, &threads_core_mask); 405 406 printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", 407 tpc, tpc > 1 ? "s" : ""); 408 printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); 409 } 410 411 412 /** 413 * setup_cpu_maps - initialize the following cpu maps: 414 * cpu_possible_mask 415 * cpu_present_mask 416 * 417 * Having the possible map set up early allows us to restrict allocations 418 * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. 419 * 420 * We do not initialize the online map here; cpus set their own bits in 421 * cpu_online_mask as they come up. 422 * 423 * This function is valid only for Open Firmware systems. finish_device_tree 424 * must be called before using this. 425 * 426 * While we're here, we may as well set the "physical" cpu ids in the paca. 427 * 428 * NOTE: This must match the parsing done in early_init_dt_scan_cpus. 429 */ 430 void __init smp_setup_cpu_maps(void) 431 { 432 struct device_node *dn = NULL; 433 int cpu = 0; 434 int nthreads = 1; 435 436 DBG("smp_setup_cpu_maps()\n"); 437 438 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) { 439 const int *intserv; 440 int j, len; 441 442 DBG(" * %s...\n", dn->full_name); 443 444 intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", 445 &len); 446 if (intserv) { 447 nthreads = len / sizeof(int); 448 DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", 449 nthreads); 450 } else { 451 DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); 452 intserv = of_get_property(dn, "reg", NULL); 453 if (!intserv) 454 intserv = &cpu; /* assume logical == phys */ 455 } 456 457 for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { 458 DBG(" thread %d -> cpu %d (hard id %d)\n", 459 j, cpu, intserv[j]); 460 set_cpu_present(cpu, true); 461 set_hard_smp_processor_id(cpu, intserv[j]); 462 set_cpu_possible(cpu, true); 463 cpu++; 464 } 465 } 466 467 /* If no SMT supported, nthreads is forced to 1 */ 468 if (!cpu_has_feature(CPU_FTR_SMT)) { 469 DBG(" SMT disabled ! nthreads forced to 1\n"); 470 nthreads = 1; 471 } 472 473 #ifdef CONFIG_PPC64 474 /* 475 * On pSeries LPAR, we need to know how many cpus 476 * could possibly be added to this partition. 477 */ 478 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) && 479 (dn = of_find_node_by_path("/rtas"))) { 480 int num_addr_cell, num_size_cell, maxcpus; 481 const unsigned int *ireg; 482 483 num_addr_cell = of_n_addr_cells(dn); 484 num_size_cell = of_n_size_cells(dn); 485 486 ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); 487 488 if (!ireg) 489 goto out; 490 491 maxcpus = ireg[num_addr_cell + num_size_cell]; 492 493 /* Double maxcpus for processors which have SMT capability */ 494 if (cpu_has_feature(CPU_FTR_SMT)) 495 maxcpus *= nthreads; 496 497 if (maxcpus > nr_cpu_ids) { 498 printk(KERN_WARNING 499 "Partition configured for %d cpus, " 500 "operating system maximum is %d.\n", 501 maxcpus, nr_cpu_ids); 502 maxcpus = nr_cpu_ids; 503 } else 504 printk(KERN_INFO "Partition configured for %d cpus.\n", 505 maxcpus); 506 507 for (cpu = 0; cpu < maxcpus; cpu++) 508 set_cpu_possible(cpu, true); 509 out: 510 of_node_put(dn); 511 } 512 vdso_data->processorCount = num_present_cpus(); 513 #endif /* CONFIG_PPC64 */ 514 515 /* Initialize CPU <=> thread mapping/ 516 * 517 * WARNING: We assume that the number of threads is the same for 518 * every CPU in the system. If that is not the case, then some code 519 * here will have to be reworked 520 */ 521 cpu_init_thread_core_maps(nthreads); 522 523 /* Now that possible cpus are set, set nr_cpu_ids for later use */ 524 setup_nr_cpu_ids(); 525 526 free_unused_pacas(); 527 } 528 #endif /* CONFIG_SMP */ 529 530 #ifdef CONFIG_PCSPKR_PLATFORM 531 static __init int add_pcspkr(void) 532 { 533 struct device_node *np; 534 struct platform_device *pd; 535 int ret; 536 537 np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); 538 of_node_put(np); 539 if (!np) 540 return -ENODEV; 541 542 pd = platform_device_alloc("pcspkr", -1); 543 if (!pd) 544 return -ENOMEM; 545 546 ret = platform_device_add(pd); 547 if (ret) 548 platform_device_put(pd); 549 550 return ret; 551 } 552 device_initcall(add_pcspkr); 553 #endif /* CONFIG_PCSPKR_PLATFORM */ 554 555 void probe_machine(void) 556 { 557 extern struct machdep_calls __machine_desc_start; 558 extern struct machdep_calls __machine_desc_end; 559 560 /* 561 * Iterate all ppc_md structures until we find the proper 562 * one for the current machine type 563 */ 564 DBG("Probing machine type ...\n"); 565 566 for (machine_id = &__machine_desc_start; 567 machine_id < &__machine_desc_end; 568 machine_id++) { 569 DBG(" %s ...", machine_id->name); 570 memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); 571 if (ppc_md.probe()) { 572 DBG(" match !\n"); 573 break; 574 } 575 DBG("\n"); 576 } 577 /* What can we do if we didn't find ? */ 578 if (machine_id >= &__machine_desc_end) { 579 DBG("No suitable machine found !\n"); 580 for (;;); 581 } 582 583 printk(KERN_INFO "Using %s machine description\n", ppc_md.name); 584 } 585 586 /* Match a class of boards, not a specific device configuration. */ 587 int check_legacy_ioport(unsigned long base_port) 588 { 589 struct device_node *parent, *np = NULL; 590 int ret = -ENODEV; 591 592 switch(base_port) { 593 case I8042_DATA_REG: 594 if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) 595 np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); 596 if (np) { 597 parent = of_get_parent(np); 598 599 of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); 600 if (!of_i8042_kbd_irq) 601 of_i8042_kbd_irq = 1; 602 603 of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); 604 if (!of_i8042_aux_irq) 605 of_i8042_aux_irq = 12; 606 607 of_node_put(np); 608 np = parent; 609 break; 610 } 611 np = of_find_node_by_type(NULL, "8042"); 612 /* Pegasos has no device_type on its 8042 node, look for the 613 * name instead */ 614 if (!np) 615 np = of_find_node_by_name(NULL, "8042"); 616 if (np) { 617 of_i8042_kbd_irq = 1; 618 of_i8042_aux_irq = 12; 619 } 620 break; 621 case FDC_BASE: /* FDC1 */ 622 np = of_find_node_by_type(NULL, "fdc"); 623 break; 624 default: 625 /* ipmi is supposed to fail here */ 626 break; 627 } 628 if (!np) 629 return ret; 630 parent = of_get_parent(np); 631 if (parent) { 632 if (strcmp(parent->type, "isa") == 0) 633 ret = 0; 634 of_node_put(parent); 635 } 636 of_node_put(np); 637 return ret; 638 } 639 EXPORT_SYMBOL(check_legacy_ioport); 640 641 static int ppc_panic_event(struct notifier_block *this, 642 unsigned long event, void *ptr) 643 { 644 /* 645 * If firmware-assisted dump has been registered then trigger 646 * firmware-assisted dump and let firmware handle everything else. 647 */ 648 crash_fadump(NULL, ptr); 649 ppc_md.panic(ptr); /* May not return */ 650 return NOTIFY_DONE; 651 } 652 653 static struct notifier_block ppc_panic_block = { 654 .notifier_call = ppc_panic_event, 655 .priority = INT_MIN /* may not return; must be done last */ 656 }; 657 658 void __init setup_panic(void) 659 { 660 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); 661 } 662 663 #ifdef CONFIG_CHECK_CACHE_COHERENCY 664 /* 665 * For platforms that have configurable cache-coherency. This function 666 * checks that the cache coherency setting of the kernel matches the setting 667 * left by the firmware, as indicated in the device tree. Since a mismatch 668 * will eventually result in DMA failures, we print * and error and call 669 * BUG() in that case. 670 */ 671 672 #ifdef CONFIG_NOT_COHERENT_CACHE 673 #define KERNEL_COHERENCY 0 674 #else 675 #define KERNEL_COHERENCY 1 676 #endif 677 678 static int __init check_cache_coherency(void) 679 { 680 struct device_node *np; 681 const void *prop; 682 int devtree_coherency; 683 684 np = of_find_node_by_path("/"); 685 prop = of_get_property(np, "coherency-off", NULL); 686 of_node_put(np); 687 688 devtree_coherency = prop ? 0 : 1; 689 690 if (devtree_coherency != KERNEL_COHERENCY) { 691 printk(KERN_ERR 692 "kernel coherency:%s != device tree_coherency:%s\n", 693 KERNEL_COHERENCY ? "on" : "off", 694 devtree_coherency ? "on" : "off"); 695 BUG(); 696 } 697 698 return 0; 699 } 700 701 late_initcall(check_cache_coherency); 702 #endif /* CONFIG_CHECK_CACHE_COHERENCY */ 703 704 #ifdef CONFIG_DEBUG_FS 705 struct dentry *powerpc_debugfs_root; 706 EXPORT_SYMBOL(powerpc_debugfs_root); 707 708 static int powerpc_debugfs_init(void) 709 { 710 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); 711 712 return powerpc_debugfs_root == NULL; 713 } 714 arch_initcall(powerpc_debugfs_init); 715 #endif 716 717 #ifdef CONFIG_BOOKE_WDT 718 extern u32 booke_wdt_enabled; 719 extern u32 booke_wdt_period; 720 721 /* Checks wdt=x and wdt_period=xx command-line option */ 722 notrace int __init early_parse_wdt(char *p) 723 { 724 if (p && strncmp(p, "0", 1) != 0) 725 booke_wdt_enabled = 1; 726 727 return 0; 728 } 729 early_param("wdt", early_parse_wdt); 730 731 int __init early_parse_wdt_period(char *p) 732 { 733 unsigned long ret; 734 if (p) { 735 if (!kstrtol(p, 0, &ret)) 736 booke_wdt_period = ret; 737 } 738 739 return 0; 740 } 741 early_param("wdt_period", early_parse_wdt_period); 742 #endif /* CONFIG_BOOKE_WDT */ 743 744 void ppc_printk_progress(char *s, unsigned short hex) 745 { 746 pr_info("%s\n", s); 747 } 748 749 void arch_setup_pdev_archdata(struct platform_device *pdev) 750 { 751 pdev->archdata.dma_mask = DMA_BIT_MASK(32); 752 pdev->dev.dma_mask = &pdev->archdata.dma_mask; 753 set_dma_ops(&pdev->dev, &dma_direct_ops); 754 } 755