blob: 79fca2651b65909d9358f3b144d8195b66f732f0 [file] [log] [blame]
Paul Mackerras03501da2005-10-26 17:11:18 +10001/*
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 */
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +110012
13#undef DEBUG
14
Paul Mackerras03501da2005-10-26 17:11:18 +100015#include <linux/module.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>
Michael Neulinge5c6c8e2006-03-14 00:11:50 -050023#include <linux/platform_device.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100024#include <linux/seq_file.h>
25#include <linux/ioport.h>
26#include <linux/console.h>
Jon Smirl894673e2006-07-10 04:44:13 -070027#include <linux/screen_info.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100028#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>
Michael Ellerman94a38072007-06-20 10:54:19 +100034#include <linux/debugfs.h>
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +100035#include <linux/percpu.h>
Yinghai Lu95f72d12010-07-12 14:36:09 +100036#include <linux/memblock.h>
Kumar Galad7462862009-03-19 03:40:51 +000037#include <linux/of_platform.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100038#include <asm/io.h>
Michael Ellerman1426d5a2010-01-28 13:23:22 +000039#include <asm/paca.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100040#include <asm/prom.h>
41#include <asm/processor.h>
Benjamin Herrenschmidta7f290d2005-11-11 21:15:21 +110042#include <asm/vdso_datapage.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100043#include <asm/pgtable.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100044#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>
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +110050#include <asm/firmware.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100051#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>
Paul Mackerrasfca5dcd2005-11-08 22:55:08 +110061#include <asm/xmon.h>
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +100062#include <asm/cputhreads.h>
Becky Brucef465df82008-10-15 08:25:28 +000063#include <mm/mmu_decl.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100064
Stephen Rothwell66ba1352005-11-09 11:01:06 +110065#include "setup.h"
66
Paul Mackerras03501da2005-10-26 17:11:18 +100067#ifdef DEBUG
Michael Ellermanf9e4ec52005-11-15 15:16:38 +110068#include <asm/udbg.h>
Paul Mackerras03501da2005-10-26 17:11:18 +100069#define DBG(fmt...) udbg_printf(fmt)
70#else
71#define DBG(fmt...)
72#endif
73
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +110074/* The main machine-dep calls structure
75 */
76struct machdep_calls ppc_md;
77EXPORT_SYMBOL(ppc_md);
78struct machdep_calls *machine_id;
79EXPORT_SYMBOL(machine_id);
Paul Mackerras799d6042005-11-10 13:37:51 +110080
Paul Mackerras49b09852005-11-10 15:53:40 +110081unsigned long klimit = (unsigned long) _end;
82
Stephen Rothwell19a8d972007-09-17 14:41:38 +100083char cmd_line[COMMAND_LINE_SIZE];
84
Paul Mackerras03501da2005-10-26 17:11:18 +100085/*
86 * This still seems to be needed... -- paulus
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
Martyn Welch540c6c32010-05-24 22:09:16 +000097/* Variables required to store legacy IO irq routing */
98int of_i8042_kbd_irq;
Grant Likelyee110062010-08-06 20:49:20 -060099EXPORT_SYMBOL_GPL(of_i8042_kbd_irq);
Martyn Welch540c6c32010-05-24 22:09:16 +0000100int of_i8042_aux_irq;
Grant Likelyee110062010-08-06 20:49:20 -0600101EXPORT_SYMBOL_GPL(of_i8042_aux_irq);
Martyn Welch540c6c32010-05-24 22:09:16 +0000102
Paul Mackerras03501da2005-10-26 17:11:18 +1000103#ifdef __DO_IRQ_CANON
104/* XXX should go elsewhere eventually */
105int ppc_do_canonicalize_irqs;
106EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
107#endif
108
109/* also used by kexec */
110void machine_shutdown(void)
111{
Michael Ellerman3d1229d2005-11-14 23:35:00 +1100112 if (ppc_md.machine_shutdown)
113 ppc_md.machine_shutdown();
Paul Mackerras03501da2005-10-26 17:11:18 +1000114}
115
116void machine_restart(char *cmd)
117{
118 machine_shutdown();
Kumar Galab8e383d2006-01-13 10:15:17 -0600119 if (ppc_md.restart)
120 ppc_md.restart(cmd);
Paul Mackerras03501da2005-10-26 17:11:18 +1000121#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();
Kumar Galab8e383d2006-01-13 10:15:17 -0600132 if (ppc_md.power_off)
133 ppc_md.power_off();
Paul Mackerras03501da2005-10-26 17:11:18 +1000134#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/* Used by the G5 thermal driver */
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();
Kumar Galab8e383d2006-01-13 10:15:17 -0600150 if (ppc_md.halt)
151 ppc_md.halt();
Paul Mackerras03501da2005-10-26 17:11:18 +1000152#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 /* CONFIG_TAU */
165
166#ifdef CONFIG_SMP
Tejun Heo6b7487f2009-10-29 22:34:14 +0900167DEFINE_PER_CPU(unsigned int, cpu_pvr);
Paul Mackerras03501da2005-10-26 17:11:18 +1000168#endif
169
Anton Blanchard2c2df032010-04-26 15:32:39 +0000170static 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 /* CONFIG_SMP && CONFIG_PPC32 */
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 /* Display the amount of memory */
197 seq_printf(m, "Memory\t\t: %d MB\n",
198 (unsigned int)(total_memory / (1024 * 1024)));
199#endif
200}
201
Paul Mackerras03501da2005-10-26 17:11:18 +1000202static 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
Paul Mackerras03501da2005-10-26 17:11:18 +1000209 /* We only show online cpus: disable preempt (overzealous, I
210 * knew) to prevent cpu going down. */
211 preempt_disable();
212 if (!cpu_online(cpu_id)) {
213 preempt_enable();
214 return 0;
215 }
216
217#ifdef CONFIG_SMP
Tejun Heo6b7487f2009-10-29 22:34:14 +0900218 pvr = per_cpu(cpu_pvr, cpu_id);
Paul Mackerras03501da2005-10-26 17:11:18 +1000219#else
Paul Mackerras03501da2005-10-26 17:11:18 +1000220 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 /* CONFIG_ALTIVEC */
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 /* more straightforward, but potentially misleading */
244 seq_printf(m, "temperature \t: %u C (uncalibrated)\n",
Paul Mackerrasbccfd582005-11-02 15:06:22 +1100245 cpu_temp(cpu_id));
Paul Mackerras03501da2005-10-26 17:11:18 +1000246#else
247 /* show the actual temp sensor range */
248 u32 temp;
Paul Mackerrasbccfd582005-11-02 15:06:22 +1100249 temp = cpu_temp_both(cpu_id);
Paul Mackerras03501da2005-10-26 17:11:18 +1000250 seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n",
251 temp & 0xff, temp >> 16);
252#endif
253 }
254#endif /* CONFIG_TAU */
255
256 /*
257 * Assume here that all clock rates are the same in a
258 * smp system. -- Cort
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 /* If we are a Freescale core do a simple check so
268 * we dont have to keep adding cases in the future */
269 if (PVR_VER(pvr) & 0x8000) {
Martin Langera501d8f2008-09-07 17:51:32 +1000270 switch (PVR_VER(pvr)) {
271 case 0x8000: /* 7441/7450/7451, Voyager */
272 case 0x8001: /* 7445/7455, Apollo 6 */
273 case 0x8002: /* 7447/7457, Apollo 7 */
274 case 0x8003: /* 7447A, Apollo 7 PM */
275 case 0x8004: /* 7448, Apollo 8 */
276 case 0x800c: /* 7410, Nitro */
277 maj = ((pvr >> 8) & 0xF);
278 min = PVR_MIN(pvr);
279 break;
280 default: /* e500/book-e */
281 maj = PVR_MAJ(pvr);
282 min = PVR_MIN(pvr);
283 break;
284 }
Paul Mackerras03501da2005-10-26 17:11:18 +1000285 } else {
286 switch (PVR_VER(pvr)) {
287 case 0x0020: /* 403 family */
288 maj = PVR_MAJ(pvr) + 1;
289 min = PVR_MIN(pvr);
290 break;
291 case 0x1008: /* 740P/750P ?? */
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();
Anton Blancharde6532c62010-04-26 15:32:40 +0000316
317 /* If this is the last cpu, print the summary */
318 if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids)
319 show_cpuinfo_summary(m);
320
Paul Mackerras03501da2005-10-26 17:11:18 +1000321 return 0;
322}
323
324static void *c_start(struct seq_file *m, loff_t *pos)
325{
Anton Blancharde6532c62010-04-26 15:32:40 +0000326 if (*pos == 0) /* just in case, cpu 0 is not the first */
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;
Paul Mackerras03501da2005-10-26 17:11:18 +1000333}
334
335static void *c_next(struct seq_file *m, void *v, loff_t *pos)
336{
Anton Blancharde6532c62010-04-26 15:32:40 +0000337 (*pos)++;
Paul Mackerras03501da2005-10-26 17:11:18 +1000338 return c_start(m, pos);
339}
340
341static void c_stop(struct seq_file *m, void *v)
342{
343}
344
James Morris88e9d342009-09-22 16:43:43 -0700345const struct seq_operations cpuinfo_op = {
Paul Mackerras03501da2005-10-26 17:11:18 +1000346 .start =c_start,
347 .next = c_next,
348 .stop = c_stop,
349 .show = show_cpuinfo,
350};
351
David Woodhousea82765b2005-11-02 22:34:20 +0000352void __init check_for_initrd(void)
353{
354#ifdef CONFIG_BLK_DEV_INITRD
David Gibson30437b32007-02-28 14:12:29 +1100355 DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n",
356 initrd_start, initrd_end);
David Woodhousea82765b2005-11-02 22:34:20 +0000357
358 /* If we were passed an initrd, set the ROOT_DEV properly if the values
359 * look sensible. If not, clear initrd reference.
360 */
Michael Ellerman51fae6de2005-12-04 18:39:15 +1100361 if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) &&
David Woodhousea82765b2005-11-02 22:34:20 +0000362 initrd_end > initrd_start)
363 ROOT_DEV = Root_RAM0;
David Woodhouse6761c4a2005-11-11 08:07:11 +0000364 else
David Woodhousea82765b2005-11-02 22:34:20 +0000365 initrd_start = initrd_end = 0;
David Woodhousea82765b2005-11-02 22:34:20 +0000366
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 /* CONFIG_BLK_DEV_INITRD */
372}
373
Paul Mackerras5ad57072005-11-05 10:33:55 +1100374#ifdef CONFIG_SMP
375
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000376int threads_per_core, threads_shift;
377cpumask_t threads_core_mask;
378
379static void __init cpu_init_thread_core_maps(int tpc)
380{
381 int i;
382
383 threads_per_core = tpc;
KOSAKI Motohiro104699c2011-04-28 05:07:23 +0000384 cpumask_clear(&threads_core_mask);
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000385
386 /* This implementation only supports power of 2 number of threads
387 * for simplicity and performance
388 */
389 threads_shift = ilog2(tpc);
390 BUG_ON(tpc != (1 << threads_shift));
391
392 for (i = 0; i < tpc; i++)
KOSAKI Motohiro104699c2011-04-28 05:07:23 +0000393 cpumask_set_cpu(i, &threads_core_mask);
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000394
395 printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n",
396 tpc, tpc > 1 ? "s" : "");
397 printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift);
398}
399
400
Paul Mackerras5ad57072005-11-05 10:33:55 +1100401/**
402 * setup_cpu_maps - initialize the following cpu maps:
Anton Blanchard828a6982010-04-26 15:32:44 +0000403 * cpu_possible_mask
404 * cpu_present_mask
Paul Mackerras5ad57072005-11-05 10:33:55 +1100405 *
406 * Having the possible map set up early allows us to restrict allocations
Milton Miller8657ae22011-05-10 19:28:48 +0000407 * of things like irqstacks to nr_cpu_ids rather than NR_CPUS.
Paul Mackerras5ad57072005-11-05 10:33:55 +1100408 *
409 * We do not initialize the online map here; cpus set their own bits in
Anton Blanchard828a6982010-04-26 15:32:44 +0000410 * cpu_online_mask as they come up.
Paul Mackerras5ad57072005-11-05 10:33:55 +1100411 *
412 * This function is valid only for Open Firmware systems. finish_device_tree
413 * must be called before using this.
414 *
415 * While we're here, we may as well set the "physical" cpu ids in the paca.
Anton Blanchard4df20462006-03-25 17:25:17 +1100416 *
417 * NOTE: This must match the parsing done in early_init_dt_scan_cpus.
Paul Mackerras5ad57072005-11-05 10:33:55 +1100418 */
419void __init smp_setup_cpu_maps(void)
420{
421 struct device_node *dn = NULL;
422 int cpu = 0;
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000423 int nthreads = 1;
424
425 DBG("smp_setup_cpu_maps()\n");
Paul Mackerras5ad57072005-11-05 10:33:55 +1100426
Milton Miller8657ae22011-05-10 19:28:48 +0000427 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) {
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000428 const int *intserv;
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000429 int j, len;
430
431 DBG(" * %s...\n", dn->full_name);
Paul Mackerras5ad57072005-11-05 10:33:55 +1100432
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000433 intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s",
434 &len);
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000435 if (intserv) {
Paul Mackerras5ad57072005-11-05 10:33:55 +1100436 nthreads = len / sizeof(int);
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000437 DBG(" ibm,ppc-interrupt-server#s -> %d threads\n",
438 nthreads);
439 } else {
440 DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n");
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000441 intserv = of_get_property(dn, "reg", NULL);
Paul Mackerras5ad57072005-11-05 10:33:55 +1100442 if (!intserv)
443 intserv = &cpu; /* assume logical == phys */
444 }
445
Milton Miller8657ae22011-05-10 19:28:48 +0000446 for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000447 DBG(" thread %d -> cpu %d (hard id %d)\n",
448 j, cpu, intserv[j]);
Rusty Russellea0f1ca2009-09-24 09:34:48 -0600449 set_cpu_present(cpu, true);
Paul Mackerras5ad57072005-11-05 10:33:55 +1100450 set_hard_smp_processor_id(cpu, intserv[j]);
Rusty Russellea0f1ca2009-09-24 09:34:48 -0600451 set_cpu_possible(cpu, true);
Paul Mackerras5ad57072005-11-05 10:33:55 +1100452 cpu++;
453 }
454 }
455
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000456 /* If no SMT supported, nthreads is forced to 1 */
457 if (!cpu_has_feature(CPU_FTR_SMT)) {
458 DBG(" SMT disabled ! nthreads forced to 1\n");
459 nthreads = 1;
460 }
461
Paul Mackerras5ad57072005-11-05 10:33:55 +1100462#ifdef CONFIG_PPC64
463 /*
464 * On pSeries LPAR, we need to know how many cpus
465 * could possibly be added to this partition.
466 */
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100467 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) &&
Paul Mackerras799d6042005-11-10 13:37:51 +1100468 (dn = of_find_node_by_path("/rtas"))) {
Paul Mackerras5ad57072005-11-05 10:33:55 +1100469 int num_addr_cell, num_size_cell, maxcpus;
Jeremy Kerra7f67bd2006-07-12 15:35:54 +1000470 const unsigned int *ireg;
Paul Mackerras5ad57072005-11-05 10:33:55 +1100471
Stephen Rothwella8bda5d2007-04-03 10:56:50 +1000472 num_addr_cell = of_n_addr_cells(dn);
Stephen Rothwell9213fee2007-04-03 10:57:48 +1000473 num_size_cell = of_n_size_cells(dn);
Paul Mackerras5ad57072005-11-05 10:33:55 +1100474
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000475 ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL);
Paul Mackerras5ad57072005-11-05 10:33:55 +1100476
477 if (!ireg)
478 goto out;
479
480 maxcpus = ireg[num_addr_cell + num_size_cell];
481
482 /* Double maxcpus for processors which have SMT capability */
483 if (cpu_has_feature(CPU_FTR_SMT))
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000484 maxcpus *= nthreads;
Paul Mackerras5ad57072005-11-05 10:33:55 +1100485
Milton Miller8657ae22011-05-10 19:28:48 +0000486 if (maxcpus > nr_cpu_ids) {
Paul Mackerras5ad57072005-11-05 10:33:55 +1100487 printk(KERN_WARNING
488 "Partition configured for %d cpus, "
489 "operating system maximum is %d.\n",
Milton Miller8657ae22011-05-10 19:28:48 +0000490 maxcpus, nr_cpu_ids);
491 maxcpus = nr_cpu_ids;
Paul Mackerras5ad57072005-11-05 10:33:55 +1100492 } else
493 printk(KERN_INFO "Partition configured for %d cpus.\n",
494 maxcpus);
495
496 for (cpu = 0; cpu < maxcpus; cpu++)
Rusty Russellea0f1ca2009-09-24 09:34:48 -0600497 set_cpu_possible(cpu, true);
Paul Mackerras5ad57072005-11-05 10:33:55 +1100498 out:
499 of_node_put(dn);
500 }
Mike Travisd5a74302007-10-16 01:24:05 -0700501 vdso_data->processorCount = num_present_cpus();
502#endif /* CONFIG_PPC64 */
Benjamin Herrenschmidt8d089082007-10-25 15:27:44 +1000503
504 /* Initialize CPU <=> thread mapping/
505 *
506 * WARNING: We assume that the number of threads is the same for
507 * every CPU in the system. If that is not the case, then some code
508 * here will have to be reworked
509 */
510 cpu_init_thread_core_maps(nthreads);
Michael Ellerman1426d5a2010-01-28 13:23:22 +0000511
Ryan Grimmc1854e02011-03-31 19:33:02 +0000512 /* Now that possible cpus are set, set nr_cpu_ids for later use */
Milton Milleraa79bc22011-05-10 19:28:55 +0000513 setup_nr_cpu_ids();
Ryan Grimmc1854e02011-03-31 19:33:02 +0000514
Michael Ellerman1426d5a2010-01-28 13:23:22 +0000515 free_unused_pacas();
Mike Travisd5a74302007-10-16 01:24:05 -0700516}
Paul Mackerras5ad57072005-11-05 10:33:55 +1100517#endif /* CONFIG_SMP */
Paul Mackerrasfca5dcd2005-11-08 22:55:08 +1100518
Emil Medved33b78d2008-05-23 08:40:16 +1000519#ifdef CONFIG_PCSPKR_PLATFORM
Michael Neulinge5c6c8e2006-03-14 00:11:50 -0500520static __init int add_pcspkr(void)
521{
522 struct device_node *np;
523 struct platform_device *pd;
524 int ret;
525
526 np = of_find_compatible_node(NULL, NULL, "pnpPNP,100");
527 of_node_put(np);
528 if (!np)
529 return -ENODEV;
530
531 pd = platform_device_alloc("pcspkr", -1);
532 if (!pd)
533 return -ENOMEM;
534
535 ret = platform_device_add(pd);
536 if (ret)
537 platform_device_put(pd);
538
539 return ret;
540}
541device_initcall(add_pcspkr);
Emil Medved33b78d2008-05-23 08:40:16 +1000542#endif /* CONFIG_PCSPKR_PLATFORM */
Dmitry Torokhov95d465f2006-04-02 00:08:05 -0500543
Benjamin Herrenschmidte8222502006-03-28 23:15:54 +1100544void probe_machine(void)
545{
546 extern struct machdep_calls __machine_desc_start;
547 extern struct machdep_calls __machine_desc_end;
548
549 /*
550 * Iterate all ppc_md structures until we find the proper
551 * one for the current machine type
552 */
553 DBG("Probing machine type ...\n");
554
555 for (machine_id = &__machine_desc_start;
556 machine_id < &__machine_desc_end;
557 machine_id++) {
558 DBG(" %s ...", machine_id->name);
559 memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
560 if (ppc_md.probe()) {
561 DBG(" match !\n");
562 break;
563 }
564 DBG("\n");
565 }
566 /* What can we do if we didn't find ? */
567 if (machine_id >= &__machine_desc_end) {
568 DBG("No suitable machine found !\n");
569 for (;;);
570 }
571
572 printk(KERN_INFO "Using %s machine description\n", ppc_md.name);
573}
David Woodhouse1269277a2006-04-24 23:22:17 +0100574
Olaf Hering8d8a0242007-04-26 06:36:56 +1000575/* Match a class of boards, not a specific device configuration. */
David Woodhouse1269277a2006-04-24 23:22:17 +0100576int check_legacy_ioport(unsigned long base_port)
577{
Olaf Hering8d8a0242007-04-26 06:36:56 +1000578 struct device_node *parent, *np = NULL;
579 int ret = -ENODEV;
580
581 switch(base_port) {
582 case I8042_DATA_REG:
Wade Farnsworthdb0dbae2007-06-20 10:15:10 +1000583 if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303")))
584 np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03");
585 if (np) {
586 parent = of_get_parent(np);
Martyn Welch540c6c32010-05-24 22:09:16 +0000587
588 of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0);
589 if (!of_i8042_kbd_irq)
590 of_i8042_kbd_irq = 1;
591
592 of_i8042_aux_irq = irq_of_parse_and_map(parent, 1);
593 if (!of_i8042_aux_irq)
594 of_i8042_aux_irq = 12;
595
Wade Farnsworthdb0dbae2007-06-20 10:15:10 +1000596 of_node_put(np);
597 np = parent;
598 break;
599 }
Olaf Hering8d8a0242007-04-26 06:36:56 +1000600 np = of_find_node_by_type(NULL, "8042");
Alan Curryf5d834f2007-07-25 11:28:32 +1000601 /* Pegasos has no device_type on its 8042 node, look for the
602 * name instead */
603 if (!np)
604 np = of_find_node_by_name(NULL, "8042");
Gabriel Paubert2c780272011-05-13 01:03:13 +0000605 if (np) {
606 of_i8042_kbd_irq = 1;
607 of_i8042_aux_irq = 12;
608 }
Olaf Hering8d8a0242007-04-26 06:36:56 +1000609 break;
610 case FDC_BASE: /* FDC1 */
611 np = of_find_node_by_type(NULL, "fdc");
612 break;
613#ifdef CONFIG_PPC_PREP
614 case _PIDXR:
615 case _PNPWRP:
616 case PNPBIOS_BASE:
617 /* implement me */
618#endif
619 default:
620 /* ipmi is supposed to fail here */
621 break;
622 }
623 if (!np)
624 return ret;
625 parent = of_get_parent(np);
626 if (parent) {
627 if (strcmp(parent->type, "isa") == 0)
628 ret = 0;
629 of_node_put(parent);
630 }
631 of_node_put(np);
632 return ret;
David Woodhouse1269277a2006-04-24 23:22:17 +0100633}
634EXPORT_SYMBOL(check_legacy_ioport);
Kumar Gala7e990262006-05-05 00:02:08 -0500635
636static int ppc_panic_event(struct notifier_block *this,
637 unsigned long event, void *ptr)
638{
639 ppc_md.panic(ptr); /* May not return */
640 return NOTIFY_DONE;
641}
642
643static struct notifier_block ppc_panic_block = {
644 .notifier_call = ppc_panic_event,
645 .priority = INT_MIN /* may not return; must be done last */
646};
647
648void __init setup_panic(void)
649{
650 atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block);
651}
Dale Farnsworth06cce432007-05-12 10:57:35 +1000652
653#ifdef CONFIG_CHECK_CACHE_COHERENCY
654/*
655 * For platforms that have configurable cache-coherency. This function
656 * checks that the cache coherency setting of the kernel matches the setting
657 * left by the firmware, as indicated in the device tree. Since a mismatch
658 * will eventually result in DMA failures, we print * and error and call
659 * BUG() in that case.
660 */
661
662#ifdef CONFIG_NOT_COHERENT_CACHE
663#define KERNEL_COHERENCY 0
664#else
665#define KERNEL_COHERENCY 1
666#endif
667
668static int __init check_cache_coherency(void)
669{
670 struct device_node *np;
671 const void *prop;
672 int devtree_coherency;
673
674 np = of_find_node_by_path("/");
675 prop = of_get_property(np, "coherency-off", NULL);
676 of_node_put(np);
677
678 devtree_coherency = prop ? 0 : 1;
679
680 if (devtree_coherency != KERNEL_COHERENCY) {
681 printk(KERN_ERR
682 "kernel coherency:%s != device tree_coherency:%s\n",
683 KERNEL_COHERENCY ? "on" : "off",
684 devtree_coherency ? "on" : "off");
685 BUG();
686 }
687
688 return 0;
689}
690
691late_initcall(check_cache_coherency);
692#endif /* CONFIG_CHECK_CACHE_COHERENCY */
Michael Ellerman94a38072007-06-20 10:54:19 +1000693
694#ifdef CONFIG_DEBUG_FS
695struct dentry *powerpc_debugfs_root;
Anton Blanchard907b1f42009-10-26 18:52:24 +0000696EXPORT_SYMBOL(powerpc_debugfs_root);
Michael Ellerman94a38072007-06-20 10:54:19 +1000697
698static int powerpc_debugfs_init(void)
699{
700 powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL);
701
702 return powerpc_debugfs_root == NULL;
703}
704arch_initcall(powerpc_debugfs_init);
705#endif
Kumar Galad7462862009-03-19 03:40:51 +0000706
707static int ppc_dflt_bus_notify(struct notifier_block *nb,
708 unsigned long action, void *data)
709{
710 struct device *dev = data;
711
712 /* We are only intereted in device addition */
713 if (action != BUS_NOTIFY_ADD_DEVICE)
714 return 0;
715
716 set_dma_ops(dev, &dma_direct_ops);
717
718 return NOTIFY_DONE;
719}
720
721static struct notifier_block ppc_dflt_plat_bus_notifier = {
722 .notifier_call = ppc_dflt_bus_notify,
723 .priority = INT_MAX,
724};
725
Kumar Galad7462862009-03-19 03:40:51 +0000726static int __init setup_bus_notifier(void)
727{
728 bus_register_notifier(&platform_bus_type, &ppc_dflt_plat_bus_notifier);
Kumar Galad7462862009-03-19 03:40:51 +0000729 return 0;
730}
731
732arch_initcall(setup_bus_notifier);