Commit | Line | Data |
---|---|---|
03501dab PM |
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 | */ | |
e8222502 BH |
12 | |
13 | #undef DEBUG | |
14 | ||
4b16f8e2 | 15 | #include <linux/export.h> |
03501dab PM |
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> | |
e5c6c8e4 | 23 | #include <linux/platform_device.h> |
03501dab PM |
24 | #include <linux/seq_file.h> |
25 | #include <linux/ioport.h> | |
26 | #include <linux/console.h> | |
894673ee | 27 | #include <linux/screen_info.h> |
03501dab PM |
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> | |
8d089085 | 34 | #include <linux/percpu.h> |
95f72d1e | 35 | #include <linux/memblock.h> |
d746286c | 36 | #include <linux/of_platform.h> |
b1923caa | 37 | #include <linux/hugetlb.h> |
7644d581 | 38 | #include <asm/debugfs.h> |
03501dab | 39 | #include <asm/io.h> |
1426d5a3 | 40 | #include <asm/paca.h> |
03501dab PM |
41 | #include <asm/prom.h> |
42 | #include <asm/processor.h> | |
a7f290da | 43 | #include <asm/vdso_datapage.h> |
03501dab | 44 | #include <asm/pgtable.h> |
03501dab PM |
45 | #include <asm/smp.h> |
46 | #include <asm/elf.h> | |
47 | #include <asm/machdep.h> | |
48 | #include <asm/time.h> | |
49 | #include <asm/cputable.h> | |
50 | #include <asm/sections.h> | |
e8222502 | 51 | #include <asm/firmware.h> |
03501dab PM |
52 | #include <asm/btext.h> |
53 | #include <asm/nvram.h> | |
54 | #include <asm/setup.h> | |
03501dab PM |
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> | |
fca5dcd4 | 61 | #include <asm/xmon.h> |
8d089085 | 62 | #include <asm/cputhreads.h> |
f465df81 | 63 | #include <mm/mmu_decl.h> |
ebaeb5ae | 64 | #include <asm/fadump.h> |
b1923caa BH |
65 | #include <asm/udbg.h> |
66 | #include <asm/hugetlb.h> | |
67 | #include <asm/livepatch.h> | |
68 | #include <asm/mmu_context.h> | |
b92a226e | 69 | #include <asm/cpu_has_feature.h> |
b1923caa BH |
70 | |
71 | #include "setup.h" | |
03501dab | 72 | |
03501dab | 73 | #ifdef DEBUG |
f9e4ec57 | 74 | #include <asm/udbg.h> |
03501dab PM |
75 | #define DBG(fmt...) udbg_printf(fmt) |
76 | #else | |
77 | #define DBG(fmt...) | |
78 | #endif | |
79 | ||
e8222502 BH |
80 | /* The main machine-dep calls structure |
81 | */ | |
82 | struct machdep_calls ppc_md; | |
83 | EXPORT_SYMBOL(ppc_md); | |
84 | struct machdep_calls *machine_id; | |
85 | EXPORT_SYMBOL(machine_id); | |
799d6046 | 86 | |
36ae37e3 BH |
87 | int boot_cpuid = -1; |
88 | EXPORT_SYMBOL_GPL(boot_cpuid); | |
89 | ||
33ec723c BH |
90 | /* |
91 | * These are used in binfmt_elf.c to put aux entries on the stack | |
92 | * for each elf executable being started. | |
93 | */ | |
94 | int dcache_bsize; | |
95 | int icache_bsize; | |
96 | int ucache_bsize; | |
97 | ||
98 | ||
49b09853 PM |
99 | unsigned long klimit = (unsigned long) _end; |
100 | ||
03501dab PM |
101 | /* |
102 | * This still seems to be needed... -- paulus | |
103 | */ | |
104 | struct screen_info screen_info = { | |
105 | .orig_x = 0, | |
106 | .orig_y = 25, | |
107 | .orig_video_cols = 80, | |
108 | .orig_video_lines = 25, | |
109 | .orig_video_isVGA = 1, | |
110 | .orig_video_points = 16 | |
111 | }; | |
e1802b06 AB |
112 | #if defined(CONFIG_FB_VGA16_MODULE) |
113 | EXPORT_SYMBOL(screen_info); | |
114 | #endif | |
03501dab | 115 | |
540c6c39 MW |
116 | /* Variables required to store legacy IO irq routing */ |
117 | int of_i8042_kbd_irq; | |
ee110066 | 118 | EXPORT_SYMBOL_GPL(of_i8042_kbd_irq); |
540c6c39 | 119 | int of_i8042_aux_irq; |
ee110066 | 120 | EXPORT_SYMBOL_GPL(of_i8042_aux_irq); |
540c6c39 | 121 | |
03501dab PM |
122 | #ifdef __DO_IRQ_CANON |
123 | /* XXX should go elsewhere eventually */ | |
124 | int ppc_do_canonicalize_irqs; | |
125 | EXPORT_SYMBOL(ppc_do_canonicalize_irqs); | |
126 | #endif | |
127 | ||
22bd0177 HB |
128 | #ifdef CONFIG_CRASH_CORE |
129 | /* This keeps a track of which one is the crashing cpu. */ | |
130 | int crashing_cpu = -1; | |
131 | #endif | |
132 | ||
03501dab PM |
133 | /* also used by kexec */ |
134 | void machine_shutdown(void) | |
135 | { | |
67b43b9d MS |
136 | #ifdef CONFIG_FA_DUMP |
137 | /* | |
138 | * if fadump is active, cleanup the fadump registration before we | |
139 | * shutdown. | |
140 | */ | |
141 | fadump_cleanup(); | |
142 | #endif | |
143 | ||
3d1229d6 ME |
144 | if (ppc_md.machine_shutdown) |
145 | ppc_md.machine_shutdown(); | |
03501dab PM |
146 | } |
147 | ||
d0d738a4 AS |
148 | static void machine_hang(void) |
149 | { | |
150 | pr_emerg("System Halted, OK to turn off power\n"); | |
151 | local_irq_disable(); | |
152 | while (1) | |
153 | ; | |
154 | } | |
155 | ||
03501dab PM |
156 | void machine_restart(char *cmd) |
157 | { | |
158 | machine_shutdown(); | |
b8e383d5 KG |
159 | if (ppc_md.restart) |
160 | ppc_md.restart(cmd); | |
d0d738a4 | 161 | |
03501dab | 162 | smp_send_stop(); |
ad247473 AS |
163 | |
164 | do_kernel_restart(cmd); | |
165 | mdelay(1000); | |
166 | ||
d0d738a4 | 167 | machine_hang(); |
03501dab PM |
168 | } |
169 | ||
170 | void machine_power_off(void) | |
171 | { | |
172 | machine_shutdown(); | |
9178ba29 AG |
173 | if (pm_power_off) |
174 | pm_power_off(); | |
d0d738a4 | 175 | |
03501dab | 176 | smp_send_stop(); |
d0d738a4 | 177 | machine_hang(); |
03501dab PM |
178 | } |
179 | /* Used by the G5 thermal driver */ | |
180 | EXPORT_SYMBOL_GPL(machine_power_off); | |
181 | ||
9178ba29 | 182 | void (*pm_power_off)(void); |
03501dab PM |
183 | EXPORT_SYMBOL_GPL(pm_power_off); |
184 | ||
185 | void machine_halt(void) | |
186 | { | |
187 | machine_shutdown(); | |
b8e383d5 KG |
188 | if (ppc_md.halt) |
189 | ppc_md.halt(); | |
d0d738a4 | 190 | |
03501dab | 191 | smp_send_stop(); |
d0d738a4 | 192 | machine_hang(); |
03501dab PM |
193 | } |
194 | ||
195 | ||
196 | #ifdef CONFIG_TAU | |
197 | extern u32 cpu_temp(unsigned long cpu); | |
198 | extern u32 cpu_temp_both(unsigned long cpu); | |
199 | #endif /* CONFIG_TAU */ | |
200 | ||
201 | #ifdef CONFIG_SMP | |
6b7487fc | 202 | DEFINE_PER_CPU(unsigned int, cpu_pvr); |
03501dab PM |
203 | #endif |
204 | ||
2c2df038 AB |
205 | static void show_cpuinfo_summary(struct seq_file *m) |
206 | { | |
207 | struct device_node *root; | |
208 | const char *model = NULL; | |
209 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) | |
210 | unsigned long bogosum = 0; | |
211 | int i; | |
212 | for_each_online_cpu(i) | |
213 | bogosum += loops_per_jiffy; | |
214 | seq_printf(m, "total bogomips\t: %lu.%02lu\n", | |
215 | bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); | |
216 | #endif /* CONFIG_SMP && CONFIG_PPC32 */ | |
217 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
218 | if (ppc_md.name) | |
219 | seq_printf(m, "platform\t: %s\n", ppc_md.name); | |
220 | root = of_find_node_by_path("/"); | |
221 | if (root) | |
222 | model = of_get_property(root, "model", NULL); | |
223 | if (model) | |
224 | seq_printf(m, "model\t\t: %s\n", model); | |
225 | of_node_put(root); | |
226 | ||
227 | if (ppc_md.show_cpuinfo != NULL) | |
228 | ppc_md.show_cpuinfo(m); | |
229 | ||
230 | #ifdef CONFIG_PPC32 | |
231 | /* Display the amount of memory */ | |
232 | seq_printf(m, "Memory\t\t: %d MB\n", | |
233 | (unsigned int)(total_memory / (1024 * 1024))); | |
234 | #endif | |
235 | } | |
236 | ||
03501dab PM |
237 | static int show_cpuinfo(struct seq_file *m, void *v) |
238 | { | |
239 | unsigned long cpu_id = (unsigned long)v - 1; | |
240 | unsigned int pvr; | |
2299d03a | 241 | unsigned long proc_freq; |
03501dab PM |
242 | unsigned short maj; |
243 | unsigned short min; | |
244 | ||
03501dab PM |
245 | /* We only show online cpus: disable preempt (overzealous, I |
246 | * knew) to prevent cpu going down. */ | |
247 | preempt_disable(); | |
248 | if (!cpu_online(cpu_id)) { | |
249 | preempt_enable(); | |
250 | return 0; | |
251 | } | |
252 | ||
253 | #ifdef CONFIG_SMP | |
6b7487fc | 254 | pvr = per_cpu(cpu_pvr, cpu_id); |
03501dab PM |
255 | #else |
256 | pvr = mfspr(SPRN_PVR); | |
257 | #endif | |
258 | maj = (pvr >> 8) & 0xFF; | |
259 | min = pvr & 0xFF; | |
260 | ||
261 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
262 | seq_printf(m, "cpu\t\t: "); | |
263 | ||
75bda950 | 264 | if (cur_cpu_spec->pvr_mask && cur_cpu_spec->cpu_name) |
03501dab PM |
265 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); |
266 | else | |
267 | seq_printf(m, "unknown (%08x)", pvr); | |
268 | ||
269 | #ifdef CONFIG_ALTIVEC | |
270 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
271 | seq_printf(m, ", altivec supported"); | |
272 | #endif /* CONFIG_ALTIVEC */ | |
273 | ||
274 | seq_printf(m, "\n"); | |
275 | ||
276 | #ifdef CONFIG_TAU | |
277 | if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { | |
278 | #ifdef CONFIG_TAU_AVERAGE | |
279 | /* more straightforward, but potentially misleading */ | |
280 | seq_printf(m, "temperature \t: %u C (uncalibrated)\n", | |
bccfd588 | 281 | cpu_temp(cpu_id)); |
03501dab PM |
282 | #else |
283 | /* show the actual temp sensor range */ | |
284 | u32 temp; | |
bccfd588 | 285 | temp = cpu_temp_both(cpu_id); |
03501dab PM |
286 | seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", |
287 | temp & 0xff, temp >> 16); | |
288 | #endif | |
289 | } | |
290 | #endif /* CONFIG_TAU */ | |
291 | ||
292 | /* | |
2299d03a GS |
293 | * Platforms that have variable clock rates, should implement |
294 | * the method ppc_md.get_proc_freq() that reports the clock | |
295 | * rate of a given cpu. The rest can use ppc_proc_freq to | |
296 | * report the clock rate that is same across all cpus. | |
03501dab | 297 | */ |
2299d03a GS |
298 | if (ppc_md.get_proc_freq) |
299 | proc_freq = ppc_md.get_proc_freq(cpu_id); | |
300 | else | |
301 | proc_freq = ppc_proc_freq; | |
302 | ||
303 | if (proc_freq) | |
03501dab | 304 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", |
2299d03a | 305 | proc_freq / 1000000, proc_freq % 1000000); |
03501dab PM |
306 | |
307 | if (ppc_md.show_percpuinfo != NULL) | |
308 | ppc_md.show_percpuinfo(m, cpu_id); | |
309 | ||
310 | /* If we are a Freescale core do a simple check so | |
311 | * we dont have to keep adding cases in the future */ | |
312 | if (PVR_VER(pvr) & 0x8000) { | |
a501d8f3 ML |
313 | switch (PVR_VER(pvr)) { |
314 | case 0x8000: /* 7441/7450/7451, Voyager */ | |
315 | case 0x8001: /* 7445/7455, Apollo 6 */ | |
316 | case 0x8002: /* 7447/7457, Apollo 7 */ | |
317 | case 0x8003: /* 7447A, Apollo 7 PM */ | |
318 | case 0x8004: /* 7448, Apollo 8 */ | |
319 | case 0x800c: /* 7410, Nitro */ | |
320 | maj = ((pvr >> 8) & 0xF); | |
321 | min = PVR_MIN(pvr); | |
322 | break; | |
323 | default: /* e500/book-e */ | |
324 | maj = PVR_MAJ(pvr); | |
325 | min = PVR_MIN(pvr); | |
326 | break; | |
327 | } | |
03501dab PM |
328 | } else { |
329 | switch (PVR_VER(pvr)) { | |
330 | case 0x0020: /* 403 family */ | |
331 | maj = PVR_MAJ(pvr) + 1; | |
332 | min = PVR_MIN(pvr); | |
333 | break; | |
334 | case 0x1008: /* 740P/750P ?? */ | |
335 | maj = ((pvr >> 8) & 0xFF) - 1; | |
336 | min = pvr & 0xFF; | |
337 | break; | |
64ebb9a2 MN |
338 | case 0x004e: /* POWER9 bits 12-15 give chip type */ |
339 | maj = (pvr >> 8) & 0x0F; | |
340 | min = pvr & 0xFF; | |
341 | break; | |
03501dab PM |
342 | default: |
343 | maj = (pvr >> 8) & 0xFF; | |
344 | min = pvr & 0xFF; | |
345 | break; | |
346 | } | |
347 | } | |
348 | ||
349 | seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", | |
350 | maj, min, PVR_VER(pvr), PVR_REV(pvr)); | |
351 | ||
352 | #ifdef CONFIG_PPC32 | |
353 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
354 | loops_per_jiffy / (500000/HZ), | |
355 | (loops_per_jiffy / (5000/HZ)) % 100); | |
356 | #endif | |
357 | ||
358 | #ifdef CONFIG_SMP | |
359 | seq_printf(m, "\n"); | |
360 | #endif | |
361 | ||
362 | preempt_enable(); | |
e6532c63 AB |
363 | |
364 | /* If this is the last cpu, print the summary */ | |
365 | if (cpumask_next(cpu_id, cpu_online_mask) >= nr_cpu_ids) | |
366 | show_cpuinfo_summary(m); | |
367 | ||
03501dab PM |
368 | return 0; |
369 | } | |
370 | ||
371 | static void *c_start(struct seq_file *m, loff_t *pos) | |
372 | { | |
e6532c63 AB |
373 | if (*pos == 0) /* just in case, cpu 0 is not the first */ |
374 | *pos = cpumask_first(cpu_online_mask); | |
375 | else | |
376 | *pos = cpumask_next(*pos - 1, cpu_online_mask); | |
377 | if ((*pos) < nr_cpu_ids) | |
378 | return (void *)(unsigned long)(*pos + 1); | |
379 | return NULL; | |
03501dab PM |
380 | } |
381 | ||
382 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
383 | { | |
e6532c63 | 384 | (*pos)++; |
03501dab PM |
385 | return c_start(m, pos); |
386 | } | |
387 | ||
388 | static void c_stop(struct seq_file *m, void *v) | |
389 | { | |
390 | } | |
391 | ||
88e9d34c | 392 | const struct seq_operations cpuinfo_op = { |
03501dab PM |
393 | .start =c_start, |
394 | .next = c_next, | |
395 | .stop = c_stop, | |
396 | .show = show_cpuinfo, | |
397 | }; | |
398 | ||
a82765b6 DW |
399 | void __init check_for_initrd(void) |
400 | { | |
401 | #ifdef CONFIG_BLK_DEV_INITRD | |
30437b3e DG |
402 | DBG(" -> check_for_initrd() initrd_start=0x%lx initrd_end=0x%lx\n", |
403 | initrd_start, initrd_end); | |
a82765b6 DW |
404 | |
405 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
406 | * look sensible. If not, clear initrd reference. | |
407 | */ | |
51fae6de | 408 | if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && |
a82765b6 DW |
409 | initrd_end > initrd_start) |
410 | ROOT_DEV = Root_RAM0; | |
6761c4a0 | 411 | else |
a82765b6 | 412 | initrd_start = initrd_end = 0; |
a82765b6 DW |
413 | |
414 | if (initrd_start) | |
a7696b36 | 415 | pr_info("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); |
a82765b6 DW |
416 | |
417 | DBG(" <- check_for_initrd()\n"); | |
418 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
419 | } | |
420 | ||
5ad57078 PM |
421 | #ifdef CONFIG_SMP |
422 | ||
5853aef1 | 423 | int threads_per_core, threads_per_subcore, threads_shift; |
8d089085 | 424 | cpumask_t threads_core_mask; |
de56a948 | 425 | EXPORT_SYMBOL_GPL(threads_per_core); |
5853aef1 | 426 | EXPORT_SYMBOL_GPL(threads_per_subcore); |
de56a948 PM |
427 | EXPORT_SYMBOL_GPL(threads_shift); |
428 | EXPORT_SYMBOL_GPL(threads_core_mask); | |
8d089085 BH |
429 | |
430 | static void __init cpu_init_thread_core_maps(int tpc) | |
431 | { | |
432 | int i; | |
433 | ||
434 | threads_per_core = tpc; | |
5853aef1 | 435 | threads_per_subcore = tpc; |
104699c0 | 436 | cpumask_clear(&threads_core_mask); |
8d089085 BH |
437 | |
438 | /* This implementation only supports power of 2 number of threads | |
439 | * for simplicity and performance | |
440 | */ | |
441 | threads_shift = ilog2(tpc); | |
442 | BUG_ON(tpc != (1 << threads_shift)); | |
443 | ||
444 | for (i = 0; i < tpc; i++) | |
104699c0 | 445 | cpumask_set_cpu(i, &threads_core_mask); |
8d089085 BH |
446 | |
447 | printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n", | |
448 | tpc, tpc > 1 ? "s" : ""); | |
449 | printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift); | |
450 | } | |
451 | ||
452 | ||
5ad57078 PM |
453 | /** |
454 | * setup_cpu_maps - initialize the following cpu maps: | |
828a6986 AB |
455 | * cpu_possible_mask |
456 | * cpu_present_mask | |
5ad57078 PM |
457 | * |
458 | * Having the possible map set up early allows us to restrict allocations | |
8657ae28 | 459 | * of things like irqstacks to nr_cpu_ids rather than NR_CPUS. |
5ad57078 PM |
460 | * |
461 | * We do not initialize the online map here; cpus set their own bits in | |
828a6986 | 462 | * cpu_online_mask as they come up. |
5ad57078 PM |
463 | * |
464 | * This function is valid only for Open Firmware systems. finish_device_tree | |
465 | * must be called before using this. | |
466 | * | |
467 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
4df20460 AB |
468 | * |
469 | * NOTE: This must match the parsing done in early_init_dt_scan_cpus. | |
5ad57078 PM |
470 | */ |
471 | void __init smp_setup_cpu_maps(void) | |
472 | { | |
473 | struct device_node *dn = NULL; | |
474 | int cpu = 0; | |
8d089085 BH |
475 | int nthreads = 1; |
476 | ||
477 | DBG("smp_setup_cpu_maps()\n"); | |
5ad57078 | 478 | |
8657ae28 | 479 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < nr_cpu_ids) { |
ac13282d | 480 | const __be32 *intserv; |
43f88120 | 481 | __be32 cpu_be; |
8d089085 BH |
482 | int j, len; |
483 | ||
b7c670d6 | 484 | DBG(" * %pOF...\n", dn); |
5ad57078 | 485 | |
e2eb6392 SR |
486 | intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", |
487 | &len); | |
8d089085 | 488 | if (intserv) { |
8d089085 BH |
489 | DBG(" ibm,ppc-interrupt-server#s -> %d threads\n", |
490 | nthreads); | |
491 | } else { | |
492 | DBG(" no ibm,ppc-interrupt-server#s -> 1 thread\n"); | |
e16c8765 | 493 | intserv = of_get_property(dn, "reg", &len); |
43f88120 AP |
494 | if (!intserv) { |
495 | cpu_be = cpu_to_be32(cpu); | |
496 | intserv = &cpu_be; /* assume logical == phys */ | |
e16c8765 | 497 | len = 4; |
43f88120 | 498 | } |
5ad57078 PM |
499 | } |
500 | ||
e16c8765 AF |
501 | nthreads = len / sizeof(int); |
502 | ||
8657ae28 | 503 | for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) { |
6663a4fa SW |
504 | bool avail; |
505 | ||
8d089085 | 506 | DBG(" thread %d -> cpu %d (hard id %d)\n", |
ac13282d | 507 | j, cpu, be32_to_cpu(intserv[j])); |
6663a4fa SW |
508 | |
509 | avail = of_device_is_available(dn); | |
510 | if (!avail) | |
511 | avail = !of_property_match_string(dn, | |
512 | "enable-method", "spin-table"); | |
513 | ||
514 | set_cpu_present(cpu, avail); | |
ac13282d | 515 | set_hard_smp_processor_id(cpu, be32_to_cpu(intserv[j])); |
ea0f1cab | 516 | set_cpu_possible(cpu, true); |
5ad57078 PM |
517 | cpu++; |
518 | } | |
519 | } | |
520 | ||
8d089085 BH |
521 | /* If no SMT supported, nthreads is forced to 1 */ |
522 | if (!cpu_has_feature(CPU_FTR_SMT)) { | |
523 | DBG(" SMT disabled ! nthreads forced to 1\n"); | |
524 | nthreads = 1; | |
525 | } | |
526 | ||
5ad57078 PM |
527 | #ifdef CONFIG_PPC64 |
528 | /* | |
529 | * On pSeries LPAR, we need to know how many cpus | |
530 | * could possibly be added to this partition. | |
531 | */ | |
0f2b3442 | 532 | if (firmware_has_feature(FW_FEATURE_LPAR) && |
799d6046 | 533 | (dn = of_find_node_by_path("/rtas"))) { |
5ad57078 | 534 | int num_addr_cell, num_size_cell, maxcpus; |
01666c8e | 535 | const __be32 *ireg; |
5ad57078 | 536 | |
a8bda5dd | 537 | num_addr_cell = of_n_addr_cells(dn); |
9213feea | 538 | num_size_cell = of_n_size_cells(dn); |
5ad57078 | 539 | |
e2eb6392 | 540 | ireg = of_get_property(dn, "ibm,lrdr-capacity", NULL); |
5ad57078 PM |
541 | |
542 | if (!ireg) | |
543 | goto out; | |
544 | ||
01666c8e | 545 | maxcpus = be32_to_cpup(ireg + num_addr_cell + num_size_cell); |
5ad57078 PM |
546 | |
547 | /* Double maxcpus for processors which have SMT capability */ | |
548 | if (cpu_has_feature(CPU_FTR_SMT)) | |
8d089085 | 549 | maxcpus *= nthreads; |
5ad57078 | 550 | |
8657ae28 | 551 | if (maxcpus > nr_cpu_ids) { |
5ad57078 PM |
552 | printk(KERN_WARNING |
553 | "Partition configured for %d cpus, " | |
9b130ad5 | 554 | "operating system maximum is %u.\n", |
8657ae28 MM |
555 | maxcpus, nr_cpu_ids); |
556 | maxcpus = nr_cpu_ids; | |
5ad57078 PM |
557 | } else |
558 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
559 | maxcpus); | |
560 | ||
561 | for (cpu = 0; cpu < maxcpus; cpu++) | |
ea0f1cab | 562 | set_cpu_possible(cpu, true); |
5ad57078 PM |
563 | out: |
564 | of_node_put(dn); | |
565 | } | |
d5a7430d MT |
566 | vdso_data->processorCount = num_present_cpus(); |
567 | #endif /* CONFIG_PPC64 */ | |
8d089085 BH |
568 | |
569 | /* Initialize CPU <=> thread mapping/ | |
570 | * | |
571 | * WARNING: We assume that the number of threads is the same for | |
572 | * every CPU in the system. If that is not the case, then some code | |
573 | * here will have to be reworked | |
574 | */ | |
575 | cpu_init_thread_core_maps(nthreads); | |
1426d5a3 | 576 | |
c1854e00 | 577 | /* Now that possible cpus are set, set nr_cpu_ids for later use */ |
aa79bc21 | 578 | setup_nr_cpu_ids(); |
c1854e00 | 579 | |
1426d5a3 | 580 | free_unused_pacas(); |
d5a7430d | 581 | } |
5ad57078 | 582 | #endif /* CONFIG_SMP */ |
fca5dcd4 | 583 | |
d33b78df | 584 | #ifdef CONFIG_PCSPKR_PLATFORM |
e5c6c8e4 MN |
585 | static __init int add_pcspkr(void) |
586 | { | |
587 | struct device_node *np; | |
588 | struct platform_device *pd; | |
589 | int ret; | |
590 | ||
591 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,100"); | |
592 | of_node_put(np); | |
593 | if (!np) | |
594 | return -ENODEV; | |
595 | ||
596 | pd = platform_device_alloc("pcspkr", -1); | |
597 | if (!pd) | |
598 | return -ENOMEM; | |
599 | ||
600 | ret = platform_device_add(pd); | |
601 | if (ret) | |
602 | platform_device_put(pd); | |
603 | ||
604 | return ret; | |
605 | } | |
606 | device_initcall(add_pcspkr); | |
d33b78df | 607 | #endif /* CONFIG_PCSPKR_PLATFORM */ |
95d465fd | 608 | |
e8222502 BH |
609 | void probe_machine(void) |
610 | { | |
611 | extern struct machdep_calls __machine_desc_start; | |
612 | extern struct machdep_calls __machine_desc_end; | |
84b62c72 | 613 | unsigned int i; |
e8222502 BH |
614 | |
615 | /* | |
616 | * Iterate all ppc_md structures until we find the proper | |
617 | * one for the current machine type | |
618 | */ | |
619 | DBG("Probing machine type ...\n"); | |
620 | ||
84b62c72 BH |
621 | /* |
622 | * Check ppc_md is empty, if not we have a bug, ie, we setup an | |
623 | * entry before probe_machine() which will be overwritten | |
624 | */ | |
625 | for (i = 0; i < (sizeof(ppc_md) / sizeof(void *)); i++) { | |
626 | if (((void **)&ppc_md)[i]) { | |
627 | printk(KERN_ERR "Entry %d in ppc_md non empty before" | |
628 | " machine probe !\n", i); | |
629 | } | |
630 | } | |
631 | ||
e8222502 BH |
632 | for (machine_id = &__machine_desc_start; |
633 | machine_id < &__machine_desc_end; | |
634 | machine_id++) { | |
635 | DBG(" %s ...", machine_id->name); | |
636 | memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls)); | |
637 | if (ppc_md.probe()) { | |
638 | DBG(" match !\n"); | |
639 | break; | |
640 | } | |
641 | DBG("\n"); | |
642 | } | |
643 | /* What can we do if we didn't find ? */ | |
644 | if (machine_id >= &__machine_desc_end) { | |
645 | DBG("No suitable machine found !\n"); | |
646 | for (;;); | |
647 | } | |
648 | ||
649 | printk(KERN_INFO "Using %s machine description\n", ppc_md.name); | |
650 | } | |
1269277a | 651 | |
8d8a0241 | 652 | /* Match a class of boards, not a specific device configuration. */ |
1269277a DW |
653 | int check_legacy_ioport(unsigned long base_port) |
654 | { | |
8d8a0241 OH |
655 | struct device_node *parent, *np = NULL; |
656 | int ret = -ENODEV; | |
657 | ||
658 | switch(base_port) { | |
659 | case I8042_DATA_REG: | |
db0dbae9 WF |
660 | if (!(np = of_find_compatible_node(NULL, NULL, "pnpPNP,303"))) |
661 | np = of_find_compatible_node(NULL, NULL, "pnpPNP,f03"); | |
662 | if (np) { | |
663 | parent = of_get_parent(np); | |
540c6c39 MW |
664 | |
665 | of_i8042_kbd_irq = irq_of_parse_and_map(parent, 0); | |
666 | if (!of_i8042_kbd_irq) | |
667 | of_i8042_kbd_irq = 1; | |
668 | ||
669 | of_i8042_aux_irq = irq_of_parse_and_map(parent, 1); | |
670 | if (!of_i8042_aux_irq) | |
671 | of_i8042_aux_irq = 12; | |
672 | ||
db0dbae9 WF |
673 | of_node_put(np); |
674 | np = parent; | |
675 | break; | |
676 | } | |
8d8a0241 | 677 | np = of_find_node_by_type(NULL, "8042"); |
f5d834fc AC |
678 | /* Pegasos has no device_type on its 8042 node, look for the |
679 | * name instead */ | |
680 | if (!np) | |
681 | np = of_find_node_by_name(NULL, "8042"); | |
2c78027a GP |
682 | if (np) { |
683 | of_i8042_kbd_irq = 1; | |
684 | of_i8042_aux_irq = 12; | |
685 | } | |
8d8a0241 OH |
686 | break; |
687 | case FDC_BASE: /* FDC1 */ | |
688 | np = of_find_node_by_type(NULL, "fdc"); | |
689 | break; | |
8d8a0241 OH |
690 | default: |
691 | /* ipmi is supposed to fail here */ | |
692 | break; | |
693 | } | |
694 | if (!np) | |
695 | return ret; | |
696 | parent = of_get_parent(np); | |
697 | if (parent) { | |
698 | if (strcmp(parent->type, "isa") == 0) | |
699 | ret = 0; | |
700 | of_node_put(parent); | |
701 | } | |
702 | of_node_put(np); | |
703 | return ret; | |
1269277a DW |
704 | } |
705 | EXPORT_SYMBOL(check_legacy_ioport); | |
7e990266 | 706 | |
06cce43c DF |
707 | #ifdef CONFIG_CHECK_CACHE_COHERENCY |
708 | /* | |
709 | * For platforms that have configurable cache-coherency. This function | |
710 | * checks that the cache coherency setting of the kernel matches the setting | |
711 | * left by the firmware, as indicated in the device tree. Since a mismatch | |
712 | * will eventually result in DMA failures, we print * and error and call | |
713 | * BUG() in that case. | |
714 | */ | |
715 | ||
716 | #ifdef CONFIG_NOT_COHERENT_CACHE | |
717 | #define KERNEL_COHERENCY 0 | |
718 | #else | |
719 | #define KERNEL_COHERENCY 1 | |
720 | #endif | |
721 | ||
722 | static int __init check_cache_coherency(void) | |
723 | { | |
724 | struct device_node *np; | |
725 | const void *prop; | |
726 | int devtree_coherency; | |
727 | ||
728 | np = of_find_node_by_path("/"); | |
729 | prop = of_get_property(np, "coherency-off", NULL); | |
730 | of_node_put(np); | |
731 | ||
732 | devtree_coherency = prop ? 0 : 1; | |
733 | ||
734 | if (devtree_coherency != KERNEL_COHERENCY) { | |
735 | printk(KERN_ERR | |
736 | "kernel coherency:%s != device tree_coherency:%s\n", | |
737 | KERNEL_COHERENCY ? "on" : "off", | |
738 | devtree_coherency ? "on" : "off"); | |
739 | BUG(); | |
740 | } | |
741 | ||
742 | return 0; | |
743 | } | |
744 | ||
745 | late_initcall(check_cache_coherency); | |
746 | #endif /* CONFIG_CHECK_CACHE_COHERENCY */ | |
94a3807c ME |
747 | |
748 | #ifdef CONFIG_DEBUG_FS | |
749 | struct dentry *powerpc_debugfs_root; | |
907b1f45 | 750 | EXPORT_SYMBOL(powerpc_debugfs_root); |
94a3807c ME |
751 | |
752 | static int powerpc_debugfs_init(void) | |
753 | { | |
754 | powerpc_debugfs_root = debugfs_create_dir("powerpc", NULL); | |
755 | ||
756 | return powerpc_debugfs_root == NULL; | |
757 | } | |
758 | arch_initcall(powerpc_debugfs_init); | |
759 | #endif | |
d746286c | 760 | |
a9c0f41b | 761 | void ppc_printk_progress(char *s, unsigned short hex) |
d746286c | 762 | { |
a9c0f41b | 763 | pr_info("%s\n", s); |
d746286c KG |
764 | } |
765 | ||
314b02f5 | 766 | void arch_setup_pdev_archdata(struct platform_device *pdev) |
d746286c | 767 | { |
314b02f5 KG |
768 | pdev->archdata.dma_mask = DMA_BIT_MASK(32); |
769 | pdev->dev.dma_mask = &pdev->archdata.dma_mask; | |
770 | set_dma_ops(&pdev->dev, &dma_direct_ops); | |
d746286c | 771 | } |
b1923caa BH |
772 | |
773 | static __init void print_system_info(void) | |
774 | { | |
775 | pr_info("-----------------------------------------------------\n"); | |
4e003747 | 776 | #ifdef CONFIG_PPC_BOOK3S_64 |
b1923caa BH |
777 | pr_info("ppc64_pft_size = 0x%llx\n", ppc64_pft_size); |
778 | #endif | |
779 | #ifdef CONFIG_PPC_STD_MMU_32 | |
780 | pr_info("Hash_size = 0x%lx\n", Hash_size); | |
781 | #endif | |
782 | pr_info("phys_mem_size = 0x%llx\n", | |
783 | (unsigned long long)memblock_phys_mem_size()); | |
784 | ||
785 | pr_info("dcache_bsize = 0x%x\n", dcache_bsize); | |
786 | pr_info("icache_bsize = 0x%x\n", icache_bsize); | |
787 | if (ucache_bsize != 0) | |
788 | pr_info("ucache_bsize = 0x%x\n", ucache_bsize); | |
789 | ||
790 | pr_info("cpu_features = 0x%016lx\n", cur_cpu_spec->cpu_features); | |
791 | pr_info(" possible = 0x%016lx\n", | |
792 | (unsigned long)CPU_FTRS_POSSIBLE); | |
793 | pr_info(" always = 0x%016lx\n", | |
794 | (unsigned long)CPU_FTRS_ALWAYS); | |
795 | pr_info("cpu_user_features = 0x%08x 0x%08x\n", | |
796 | cur_cpu_spec->cpu_user_features, | |
797 | cur_cpu_spec->cpu_user_features2); | |
798 | pr_info("mmu_features = 0x%08x\n", cur_cpu_spec->mmu_features); | |
799 | #ifdef CONFIG_PPC64 | |
800 | pr_info("firmware_features = 0x%016lx\n", powerpc_firmware_features); | |
801 | #endif | |
802 | ||
4e003747 | 803 | #ifdef CONFIG_PPC_BOOK3S_64 |
b1923caa BH |
804 | if (htab_address) |
805 | pr_info("htab_address = 0x%p\n", htab_address); | |
806 | if (htab_hash_mask) | |
807 | pr_info("htab_hash_mask = 0x%lx\n", htab_hash_mask); | |
808 | #endif | |
809 | #ifdef CONFIG_PPC_STD_MMU_32 | |
810 | if (Hash) | |
811 | pr_info("Hash = 0x%p\n", Hash); | |
812 | if (Hash_mask) | |
813 | pr_info("Hash_mask = 0x%lx\n", Hash_mask); | |
814 | #endif | |
815 | ||
816 | if (PHYSICAL_START > 0) | |
817 | pr_info("physical_start = 0x%llx\n", | |
818 | (unsigned long long)PHYSICAL_START); | |
819 | pr_info("-----------------------------------------------------\n"); | |
820 | } | |
821 | ||
822 | /* | |
823 | * Called into from start_kernel this initializes memblock, which is used | |
824 | * to manage page allocation until mem_init is called. | |
825 | */ | |
826 | void __init setup_arch(char **cmdline_p) | |
827 | { | |
828 | *cmdline_p = boot_command_line; | |
829 | ||
830 | /* Set a half-reasonable default so udelay does something sensible */ | |
831 | loops_per_jiffy = 500000000 / HZ; | |
832 | ||
833 | /* Unflatten the device-tree passed by prom_init or kexec */ | |
834 | unflatten_device_tree(); | |
835 | ||
836 | /* | |
837 | * Initialize cache line/block info from device-tree (on ppc64) or | |
838 | * just cputable (on ppc32). | |
839 | */ | |
840 | initialize_cache_info(); | |
841 | ||
842 | /* Initialize RTAS if available. */ | |
843 | rtas_initialize(); | |
844 | ||
845 | /* Check if we have an initrd provided via the device-tree. */ | |
846 | check_for_initrd(); | |
847 | ||
848 | /* Probe the machine type, establish ppc_md. */ | |
849 | probe_machine(); | |
850 | ||
b1923caa BH |
851 | /* |
852 | * Configure ppc_md.power_save (ppc32 only, 64-bit machines do | |
853 | * it from their respective probe() function. | |
854 | */ | |
855 | setup_power_save(); | |
856 | ||
857 | /* Discover standard serial ports. */ | |
858 | find_legacy_serial_ports(); | |
859 | ||
860 | /* Register early console with the printk subsystem. */ | |
861 | register_early_udbg_console(); | |
862 | ||
863 | /* Setup the various CPU maps based on the device-tree. */ | |
864 | smp_setup_cpu_maps(); | |
865 | ||
866 | /* Initialize xmon. */ | |
867 | xmon_setup(); | |
868 | ||
869 | /* Check the SMT related command line arguments (ppc64). */ | |
870 | check_smt_enabled(); | |
871 | ||
872 | /* On BookE, setup per-core TLB data structures. */ | |
873 | setup_tlb_core_data(); | |
874 | ||
875 | /* | |
876 | * Release secondary cpus out of their spinloops at 0x60 now that | |
877 | * we can map physical -> logical CPU ids. | |
878 | * | |
879 | * Freescale Book3e parts spin in a loop provided by firmware, | |
880 | * so smp_release_cpus() does nothing for them. | |
881 | */ | |
882 | #ifdef CONFIG_SMP | |
883 | smp_release_cpus(); | |
884 | #endif | |
885 | ||
886 | /* Print various info about the machine that has been gathered so far. */ | |
887 | print_system_info(); | |
888 | ||
889 | /* Reserve large chunks of memory for use by CMA for KVM. */ | |
890 | kvm_cma_reserve(); | |
891 | ||
b1923caa BH |
892 | klp_init_thread_info(&init_thread_info); |
893 | ||
894 | init_mm.start_code = (unsigned long)_stext; | |
895 | init_mm.end_code = (unsigned long) _etext; | |
896 | init_mm.end_data = (unsigned long) _edata; | |
897 | init_mm.brk = klimit; | |
957b778a AK |
898 | |
899 | #ifdef CONFIG_PPC_MM_SLICES | |
900 | #ifdef CONFIG_PPC64 | |
4722476b NP |
901 | if (!radix_enabled()) |
902 | init_mm.context.slb_addr_limit = DEFAULT_MAP_WINDOW_USER64; | |
957b778a AK |
903 | #else |
904 | #error "context.addr_limit not initialized." | |
905 | #endif | |
906 | #endif | |
907 | ||
b1923caa | 908 | #ifdef CONFIG_SPAPR_TCE_IOMMU |
88f54a35 | 909 | mm_iommu_init(&init_mm); |
b1923caa BH |
910 | #endif |
911 | irqstack_early_init(); | |
912 | exc_lvl_early_init(); | |
913 | emergency_stack_init(); | |
914 | ||
915 | initmem_init(); | |
916 | ||
917 | #ifdef CONFIG_DUMMY_CONSOLE | |
918 | conswitchp = &dummy_con; | |
919 | #endif | |
920 | if (ppc_md.setup_arch) | |
921 | ppc_md.setup_arch(); | |
922 | ||
923 | paging_init(); | |
924 | ||
925 | /* Initialize the MMU context management stuff. */ | |
926 | mmu_context_init(); | |
927 | ||
928 | #ifdef CONFIG_PPC64 | |
929 | /* Interrupt code needs to be 64K-aligned. */ | |
930 | if ((unsigned long)_stext & 0xffff) | |
931 | panic("Kernelbase not 64K-aligned (0x%lx)!\n", | |
932 | (unsigned long)_stext); | |
933 | #endif | |
934 | } |