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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/system.h>
55#include <asm/rtas.h>
56#include <asm/iommu.h>
57#include <asm/serial.h>
58#include <asm/cache.h>
59#include <asm/page.h>
60#include <asm/mmu.h>
61#include <asm/xmon.h>
62#include <asm/cputhreads.h>
63#include <mm/mmu_decl.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
75
76struct machdep_calls ppc_md;
77EXPORT_SYMBOL(ppc_md);
78struct machdep_calls *machine_id;
79EXPORT_SYMBOL(machine_id);
80
81unsigned long klimit = (unsigned long) _end;
82
83char cmd_line[COMMAND_LINE_SIZE];
84
85
86
87
88struct 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
98int of_i8042_kbd_irq;
99EXPORT_SYMBOL_GPL(of_i8042_kbd_irq);
100int of_i8042_aux_irq;
101EXPORT_SYMBOL_GPL(of_i8042_aux_irq);
102
103#ifdef __DO_IRQ_CANON
104
105int ppc_do_canonicalize_irqs;
106EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
107#endif
108
109
110void machine_shutdown(void)
111{
112 if (ppc_md.machine_shutdown)
113 ppc_md.machine_shutdown();
114}
115
116void machine_restart(char *cmd)
117{
118 machine_shutdown();
119 if (ppc_md.restart)
120 ppc_md.restart(cmd);
121#ifdef CONFIG_SMP
122 smp_send_stop();
123#endif
124 printk(KERN_EMERG "System Halted, OK to turn off power\n");
125 local_irq_disable();
126 while (1) ;
127}
128
129void machine_power_off(void)
130{
131 machine_shutdown();
132 if (ppc_md.power_off)
133 ppc_md.power_off();
134#ifdef CONFIG_SMP
135 smp_send_stop();
136#endif
137 printk(KERN_EMERG "System Halted, OK to turn off power\n");
138 local_irq_disable();
139 while (1) ;
140}
141
142EXPORT_SYMBOL_GPL(machine_power_off);
143
144void (*pm_power_off)(void) = machine_power_off;
145EXPORT_SYMBOL_GPL(pm_power_off);
146
147void machine_halt(void)
148{
149 machine_shutdown();
150 if (ppc_md.halt)
151 ppc_md.halt();
152#ifdef CONFIG_SMP
153 smp_send_stop();
154#endif
155 printk(KERN_EMERG "System Halted, OK to turn off power\n");
156 local_irq_disable();
157 while (1) ;
158}
159
160
161#ifdef CONFIG_TAU
162extern u32 cpu_temp(unsigned long cpu);
163extern u32 cpu_temp_both(unsigned long cpu);
164#endif
165
166#ifdef CONFIG_SMP
167DEFINE_PER_CPU(unsigned int, cpu_pvr);
168#endif
169
170static void show_cpuinfo_summary(struct seq_file *m)
171{
172 struct device_node *root;
173 const char *model = NULL;
174#if defined(CONFIG_SMP) && defined(CONFIG_PPC32)
175 unsigned long bogosum = 0;
176 int i;
177 for_each_online_cpu(i)
178 bogosum += loops_per_jiffy;
179 seq_printf(m, "total bogomips\t: %lu.%02lu\n",
180 bogosum/(500000/HZ), bogosum/(5000/HZ) % 100);
181#endif
182 seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq);
183 if (ppc_md.name)
184 seq_printf(m, "platform\t: %s\n", ppc_md.name);
185 root = of_find_node_by_path("/");
186 if (root)
187 model = of_get_property(root, "model", NULL);
188 if (model)
189 seq_printf(m, "model\t\t: %s\n", model);
190 of_node_put(root);
191
192 if (ppc_md.show_cpuinfo != NULL)
193 ppc_md.show_cpuinfo(m);
194
195#ifdef CONFIG_PPC32
196
197 seq_printf(m, "Memory\t\t: %d MB\n",
198 (unsigned int)(total_memory / (1024 * 1024)));
199#endif
200}
201
202static int show_cpuinfo(struct seq_file *m, void *v)
203{
204 unsigned long cpu_id = (unsigned long)v - 1;
205 unsigned int pvr;
206 unsigned short maj;
207 unsigned short min;
208
209
210
211 preempt_disable();
212 if (!cpu_online(cpu_id)) {
213 preempt_enable();
214 return 0;
215 }
216
217#ifdef CONFIG_SMP
218 pvr = per_cpu(cpu_pvr, cpu_id);
219#else
220 pvr = mfspr(SPRN_PVR);
221#endif
222 maj = (pvr >> 8) & 0xFF;
223 min = pvr & 0xFF;
224
225 seq_printf(m, "processor\t: %lu\n", cpu_id);
226 seq_printf(m, "cpu\t\t: ");
227
228 if (cur_cpu_spec->pvr_mask)
229 seq_printf(m, "%s", cur_cpu_spec->cpu_name);
230 else
231 seq_printf(m, "unknown (%08x)", pvr);
232
233#ifdef CONFIG_ALTIVEC
234 if (cpu_has_feature(CPU_FTR_ALTIVEC))
235 seq_printf(m, ", altivec supported");
236#endif
237
238 seq_printf(m, "\n");
239
240#ifdef CONFIG_TAU
241 if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) {
242#ifdef CONFIG_TAU_AVERAGE
243
244 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
245 cpu_temp(cpu_id));
246#else
247
248 u32 temp;
249 temp = cpu_temp_both(cpu_id);
250 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
251 temp & 0xff, temp >> 16);
252#endif
253 }
254#endif
255
256
257
258
259
260 if (ppc_proc_freq)
261 seq_printf(m, "clock\t\t: %lu.%06luMHz\n",
262 ppc_proc_freq / 1000000, ppc_proc_freq % 1000000);
263
264 if (ppc_md.show_percpuinfo != NULL)
265 ppc_md.show_percpuinfo(m, cpu_id);
266
267
268
269 if (PVR_VER(pvr) & 0x8000) {
270 switch (PVR_VER(pvr)) {
271 case 0x8000:
272 case 0x8001:
273 case 0x8002:
274 case 0x8003:
275 case 0x8004:
276 case 0x800c:
277 maj = ((pvr >> 8) & 0xF);
278 min = PVR_MIN(pvr);
279 break;
280 default:
281 maj = PVR_MAJ(pvr);
282 min = PVR_MIN(pvr);
283 break;
284 }
285 } else {
286 switch (PVR_VER(pvr)) {
287 case 0x0020:
288 maj = PVR_MAJ(pvr) + 1;
289 min = PVR_MIN(pvr);
290 break;
291 case 0x1008:
292 maj = ((pvr >> 8) & 0xFF) - 1;
293 min = pvr & 0xFF;
294 break;
295 default:
296 maj = (pvr >> 8) & 0xFF;
297 min = pvr & 0xFF;
298 break;
299 }
300 }
301
302 seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n",
303 maj, min, PVR_VER(pvr), PVR_REV(pvr));
304
305#ifdef CONFIG_PPC32
306 seq_printf(m, "bogomips\t: %lu.%02lu\n",
307 loops_per_jiffy / (500000/HZ),
308 (loops_per_jiffy / (5000/HZ)) % 100);
309#endif
310
311#ifdef CONFIG_SMP
312 seq_printf(m, "\n");
313#endif
314
315 preempt_enable();
316
317
318 if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids)
319 show_cpuinfo_summary(m);
320
321 return 0;
322}
323
324static void *c_start(struct seq_file *m, loff_t *pos)
325{
326 if (*pos == 0)
327 *pos = cpumask_first(cpu_online_mask);
328 else
329 *pos = cpumask_next(*pos - 1, cpu_online_mask);
330 if ((*pos) < nr_cpu_ids)
331 return (void *)(unsigned long)(*pos + 1);
332 return NULL;
333}
334
335static void *c_next(struct seq_file *m, void *v, loff_t *pos)
336{
337 (*pos)++;
338 return c_start(m, pos);
339}
340
341static void c_stop(struct seq_file *m, void *v)
342{
343}
344
345const struct seq_operations cpuinfo_op = {
346 .start =c_start,
347 .next = c_next,
348 .stop = c_stop,
349 .show = show_cpuinfo,
350};
351
352void __init check_for_initrd(void)
353{
354#ifdef CONFIG_BLK_DEV_INITRD
355 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n",
356 initrd_start, initrd_end);
357
358
359
360
361 if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
362 initrd_end > initrd_start)
363 ROOT_DEV = Root_RAM0;
364 else
365 initrd_start = initrd_end = 0;
366
367 if (initrd_start)
368 printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end);
369
370 DBG(" <- check_for_initrd()\n");
371#endif
372}
373
374#ifdef CONFIG_SMP
375
376int threads_per_core, threads_shift;
377cpumask_t threads_core_mask;
378EXPORT_SYMBOL_GPL(threads_per_core);
379EXPORT_SYMBOL_GPL(threads_shift);
380EXPORT_SYMBOL_GPL(threads_core_mask);
381
382static void __init cpu_init_thread_core_maps(int tpc)
383{
384 int i;
385
386 threads_per_core = tpc;
387 cpumask_clear(&threads_core_mask);
388
389
390
391
392 threads_shift = ilog2(tpc);
393 BUG_ON(tpc != (1 << threads_shift));
394
395 for (i = 0; i < tpc; i++)
396 cpumask_set_cpu(i, &threads_core_mask);
397
398 printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n",
399 tpc, tpc > 1 ? "s" : "");
400 printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift);
401}
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420
421
422void __init smp_setup_cpu_maps(void)
423{
424 struct device_node *dn = NULL;
425 int cpu = 0;
426 int nthreads = 1;
427
428 DBG("smp_setup_cpu_maps()\n");
429
430 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) {
431 const int *intserv;
432 int j, len;
433
434 DBG(" * %s...\n", dn->full_name);
435
436 intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",
437 &len);
438 if (intserv) {
439 nthreads = len / sizeof(int);
440 DBG(" ibm,ppc-interrupt-server#s -> %d threads\n",
441 nthreads);
442 } else {
443 DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n");
444 intserv = of_get_property(dn, "reg", NULL);
445 if (!intserv)
446 intserv = &cpu;
447 }
448
449 for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
450 DBG(" thread %d -> cpu %d (hard id %d)\n",
451 j, cpu, intserv[j]);
452 set_cpu_present(cpu, true);
453 set_hard_smp_processor_id(cpu, intserv[j]);
454 set_cpu_possible(cpu, true);
455 cpu++;
456 }
457 }
458
459
460 if (!cpu_has_feature(CPU_FTR_SMT)) {
461 DBG(" SMT disabled ! nthreads forced to 1\n");
462 nthreads = 1;
463 }
464
465#ifdef CONFIG_PPC64
466
467
468
469
470 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) &&
471 (dn = of_find_node_by_path("/rtas"))) {
472 int num_addr_cell, num_size_cell, maxcpus;
473 const unsigned int *ireg;
474
475 num_addr_cell = of_n_addr_cells(dn);
476 num_size_cell = of_n_size_cells(dn);
477
478 ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);
479
480 if (!ireg)
481 goto out;
482
483 maxcpus = ireg[num_addr_cell + num_size_cell];
484
485
486 if (cpu_has_feature(CPU_FTR_SMT))
487 maxcpus *= nthreads;
488
489 if (maxcpus > nr_cpu_ids) {
490 printk(KERN_WARNING
491 "Partition configured for %d cpus, "
492 "operating system maximum is %d.\n",
493 maxcpus, nr_cpu_ids);
494 maxcpus = nr_cpu_ids;
495 } else
496 printk(KERN_INFO "Partition configured for %d cpus.\n",
497 maxcpus);
498
499 for (cpu = 0; cpu < maxcpus; cpu++)
500 set_cpu_possible(cpu, true);
501 out:
502 of_node_put(dn);
503 }
504 vdso_data->processorCount = num_present_cpus();
505#endif
506
507
508
509
510
511
512
513 cpu_init_thread_core_maps(nthreads);
514
515
516 setup_nr_cpu_ids();
517
518 free_unused_pacas();
519}
520#endif
521
522#ifdef CONFIG_PCSPKR_PLATFORM
523static __init int add_pcspkr(void)
524{
525 struct device_node *np;
526 struct platform_device *pd;
527 int ret;
528
529 np = of_find_compatible_node(NULL, NULL, "pnpPNP,100");
530 of_node_put(np);
531 if (!np)
532 return -ENODEV;
533
534 pd = platform_device_alloc("pcspkr", -1);
535 if (!pd)
536 return -ENOMEM;
537
538 ret = platform_device_add(pd);
539 if (ret)
540 platform_device_put(pd);
541
542 return ret;
543}
544device_initcall(add_pcspkr);
545#endif
546
547void probe_machine(void)
548{
549 extern struct machdep_calls __machine_desc_start;
550 extern struct machdep_calls __machine_desc_end;
551
552
553
554
555
556 DBG("Probing machine type ...\n");
557
558 for (machine_id = &__machine_desc_start;
559 machine_id < &__machine_desc_end;
560 machine_id++) {
561 DBG(" %s ...", machine_id->name);
562 memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
563 if (ppc_md.probe()) {
564 DBG(" match !\n");
565 break;
566 }
567 DBG("\n");
568 }
569
570 if (machine_id >= &__machine_desc_end) {
571 DBG("No suitable machine found !\n");
572 for (;;);
573 }
574
575 printk(KERN_INFO "Using %s machine description\n", ppc_md.name);
576}
577
578
579int check_legacy_ioport(unsigned long base_port)
580{
581 struct device_node *parent, *np = NULL;
582 int ret = -ENODEV;
583
584 switch(base_port) {
585 case I8042_DATA_REG:
586 if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303")))
587 np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03");
588 if (np) {
589 parent = of_get_parent(np);
590
591 of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0);
592 if (!of_i8042_kbd_irq)
593 of_i8042_kbd_irq = 1;
594
595 of_i8042_aux_irq = irq_of_parse_and_map(parent, 1);
596 if (!of_i8042_aux_irq)
597 of_i8042_aux_irq = 12;
598
599 of_node_put(np);
600 np = parent;
601 break;
602 }
603 np = of_find_node_by_type(NULL, "8042");
604
605
606 if (!np)
607 np = of_find_node_by_name(NULL, "8042");
608 if (np) {
609 of_i8042_kbd_irq = 1;
610 of_i8042_aux_irq = 12;
611 }
612 break;
613 case FDC_BASE:
614 np = of_find_node_by_type(NULL, "fdc");
615 break;
616#ifdef CONFIG_PPC_PREP
617 case _PIDXR:
618 case _PNPWRP:
619 case PNPBIOS_BASE:
620
621#endif
622 default:
623
624 break;
625 }
626 if (!np)
627 return ret;
628 parent = of_get_parent(np);
629 if (parent) {
630 if (strcmp(parent->type, "isa") == 0)
631 ret = 0;
632 of_node_put(parent);
633 }
634 of_node_put(np);
635 return ret;
636}
637EXPORT_SYMBOL(check_legacy_ioport);
638
639static int ppc_panic_event(struct notifier_block *this,
640 unsigned long event, void *ptr)
641{
642 ppc_md.panic(ptr);
643 return NOTIFY_DONE;
644}
645
646static struct notifier_block ppc_panic_block = {
647 .notifier_call = ppc_panic_event,
648 .priority = INT_MIN
649};
650
651void __init setup_panic(void)
652{
653 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
654}
655
656#ifdef CONFIG_CHECK_CACHE_COHERENCY
657
658
659
660
661
662
663
664
665#ifdef CONFIG_NOT_COHERENT_CACHE
666#define KERNEL_COHERENCY 0
667#else
668#define KERNEL_COHERENCY 1
669#endif
670
671static int __init check_cache_coherency(void)
672{
673 struct device_node *np;
674 const void *prop;
675 int devtree_coherency;
676
677 np = of_find_node_by_path("/");
678 prop = of_get_property(np, "coherency-off", NULL);
679 of_node_put(np);
680
681 devtree_coherency = prop ? 0 : 1;
682
683 if (devtree_coherency != KERNEL_COHERENCY) {
684 printk(KERN_ERR
685 "kernel coherency:%s != device tree_coherency:%s\n",
686 KERNEL_COHERENCY ? "on" : "off",
687 devtree_coherency ? "on" : "off");
688 BUG();
689 }
690
691 return 0;
692}
693
694late_initcall(check_cache_coherency);
695#endif
696
697#ifdef CONFIG_DEBUG_FS
698struct dentry *powerpc_debugfs_root;
699EXPORT_SYMBOL(powerpc_debugfs_root);
700
701static int powerpc_debugfs_init(void)
702{
703 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL);
704
705 return powerpc_debugfs_root == NULL;
706}
707arch_initcall(powerpc_debugfs_init);
708#endif
709
710void ppc_printk_progress(char *s, unsigned short hex)
711{
712 pr_info("%s\n", s);
713}
714
715void arch_setup_pdev_archdata(struct platform_device *pdev)
716{
717 pdev->archdata.dma_mask = DMA_BIT_MASK(32);
718 pdev->dev.dma_mask = &pdev->archdata.dma_mask;
719 set_dma_ops(&pdev->dev, &dma_direct_ops);
720}
721