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 */
machine_shutdown(void)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
machine_restart(char * cmd)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
machine_power_off(void)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
machine_halt(void)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
show_cpuinfo_summary(struct seq_file * m)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
show_cpuinfo(struct seq_file * m,void * v)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
c_start(struct seq_file * m,loff_t * pos)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
c_next(struct seq_file * m,void * v,loff_t * pos)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
c_stop(struct seq_file * m,void * v)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
check_for_initrd(void)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
cpu_init_thread_core_maps(int tpc)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 */
smp_setup_cpu_maps(void)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
add_pcspkr(void)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
probe_machine(void)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. */
check_legacy_ioport(unsigned long base_port)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 #ifdef CONFIG_PPC_PREP
625 case _PIDXR:
626 case _PNPWRP:
627 case PNPBIOS_BASE:
628 /* implement me */
629 #endif
630 default:
631 /* ipmi is supposed to fail here */
632 break;
633 }
634 if (!np)
635 return ret;
636 parent = of_get_parent(np);
637 if (parent) {
638 if (strcmp(parent->type, "isa") == 0)
639 ret = 0;
640 of_node_put(parent);
641 }
642 of_node_put(np);
643 return ret;
644 }
645 EXPORT_SYMBOL(check_legacy_ioport);
646
ppc_panic_event(struct notifier_block * this,unsigned long event,void * ptr)647 static int ppc_panic_event(struct notifier_block *this,
648 unsigned long event, void *ptr)
649 {
650 /*
651 * If firmware-assisted dump has been registered then trigger
652 * firmware-assisted dump and let firmware handle everything else.
653 */
654 crash_fadump(NULL, ptr);
655 ppc_md.panic(ptr); /* May not return */
656 return NOTIFY_DONE;
657 }
658
659 static struct notifier_block ppc_panic_block = {
660 .notifier_call = ppc_panic_event,
661 .priority = INT_MIN /* may not return; must be done last */
662 };
663
setup_panic(void)664 void __init setup_panic(void)
665 {
666 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
667 }
668
669 #ifdef CONFIG_CHECK_CACHE_COHERENCY
670 /*
671 * For platforms that have configurable cache-coherency. This function
672 * checks that the cache coherency setting of the kernel matches the setting
673 * left by the firmware, as indicated in the device tree. Since a mismatch
674 * will eventually result in DMA failures, we print * and error and call
675 * BUG() in that case.
676 */
677
678 #ifdef CONFIG_NOT_COHERENT_CACHE
679 #define KERNEL_COHERENCY 0
680 #else
681 #define KERNEL_COHERENCY 1
682 #endif
683
check_cache_coherency(void)684 static int __init check_cache_coherency(void)
685 {
686 struct device_node *np;
687 const void *prop;
688 int devtree_coherency;
689
690 np = of_find_node_by_path("/");
691 prop = of_get_property(np, "coherency-off", NULL);
692 of_node_put(np);
693
694 devtree_coherency = prop ? 0 : 1;
695
696 if (devtree_coherency != KERNEL_COHERENCY) {
697 printk(KERN_ERR
698 "kernel coherency:%s != device tree_coherency:%s\n",
699 KERNEL_COHERENCY ? "on" : "off",
700 devtree_coherency ? "on" : "off");
701 BUG();
702 }
703
704 return 0;
705 }
706
707 late_initcall(check_cache_coherency);
708 #endif /* CONFIG_CHECK_CACHE_COHERENCY */
709
710 #ifdef CONFIG_DEBUG_FS
711 struct dentry *powerpc_debugfs_root;
712 EXPORT_SYMBOL(powerpc_debugfs_root);
713
powerpc_debugfs_init(void)714 static int powerpc_debugfs_init(void)
715 {
716 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL);
717
718 return powerpc_debugfs_root == NULL;
719 }
720 arch_initcall(powerpc_debugfs_init);
721 #endif
722
ppc_printk_progress(char * s,unsigned short hex)723 void ppc_printk_progress(char *s, unsigned short hex)
724 {
725 pr_info("%s\n", s);
726 }
727
arch_setup_pdev_archdata(struct platform_device * pdev)728 void arch_setup_pdev_archdata(struct platform_device *pdev)
729 {
730 pdev->archdata.dma_mask = DMA_BIT_MASK(32);
731 pdev->dev.dma_mask = &pdev->archdata.dma_mask;
732 set_dma_ops(&pdev->dev, &dma_direct_ops);
733 }
734