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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 | */ | |
12 | #include <linux/config.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/string.h> | |
15 | #include <linux/sched.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/reboot.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/initrd.h> | |
21 | #include <linux/ide.h> | |
22 | #include <linux/seq_file.h> | |
23 | #include <linux/ioport.h> | |
24 | #include <linux/console.h> | |
25 | #include <linux/utsname.h> | |
26 | #include <linux/tty.h> | |
27 | #include <linux/root_dev.h> | |
28 | #include <linux/notifier.h> | |
29 | #include <linux/cpu.h> | |
30 | #include <linux/unistd.h> | |
31 | #include <linux/serial.h> | |
32 | #include <linux/serial_8250.h> | |
33 | #include <asm/io.h> | |
34 | #include <asm/prom.h> | |
35 | #include <asm/processor.h> | |
a7f290da | 36 | #include <asm/vdso_datapage.h> |
03501dab | 37 | #include <asm/pgtable.h> |
03501dab PM |
38 | #include <asm/smp.h> |
39 | #include <asm/elf.h> | |
40 | #include <asm/machdep.h> | |
41 | #include <asm/time.h> | |
42 | #include <asm/cputable.h> | |
43 | #include <asm/sections.h> | |
44 | #include <asm/btext.h> | |
45 | #include <asm/nvram.h> | |
46 | #include <asm/setup.h> | |
47 | #include <asm/system.h> | |
48 | #include <asm/rtas.h> | |
49 | #include <asm/iommu.h> | |
50 | #include <asm/serial.h> | |
51 | #include <asm/cache.h> | |
52 | #include <asm/page.h> | |
53 | #include <asm/mmu.h> | |
54 | #include <asm/lmb.h> | |
fca5dcd4 | 55 | #include <asm/xmon.h> |
03501dab | 56 | |
66ba135c SR |
57 | #include "setup.h" |
58 | ||
03501dab PM |
59 | #undef DEBUG |
60 | ||
61 | #ifdef DEBUG | |
f9e4ec57 | 62 | #include <asm/udbg.h> |
03501dab PM |
63 | #define DBG(fmt...) udbg_printf(fmt) |
64 | #else | |
65 | #define DBG(fmt...) | |
66 | #endif | |
67 | ||
799d6046 PM |
68 | #ifdef CONFIG_PPC_MULTIPLATFORM |
69 | int _machine = 0; | |
70 | EXPORT_SYMBOL(_machine); | |
71 | #endif | |
72 | ||
49b09853 PM |
73 | unsigned long klimit = (unsigned long) _end; |
74 | ||
03501dab PM |
75 | /* |
76 | * This still seems to be needed... -- paulus | |
77 | */ | |
78 | struct screen_info screen_info = { | |
79 | .orig_x = 0, | |
80 | .orig_y = 25, | |
81 | .orig_video_cols = 80, | |
82 | .orig_video_lines = 25, | |
83 | .orig_video_isVGA = 1, | |
84 | .orig_video_points = 16 | |
85 | }; | |
86 | ||
87 | #ifdef __DO_IRQ_CANON | |
88 | /* XXX should go elsewhere eventually */ | |
89 | int ppc_do_canonicalize_irqs; | |
90 | EXPORT_SYMBOL(ppc_do_canonicalize_irqs); | |
91 | #endif | |
92 | ||
93 | /* also used by kexec */ | |
94 | void machine_shutdown(void) | |
95 | { | |
3d1229d6 ME |
96 | if (ppc_md.machine_shutdown) |
97 | ppc_md.machine_shutdown(); | |
03501dab PM |
98 | } |
99 | ||
100 | void machine_restart(char *cmd) | |
101 | { | |
102 | machine_shutdown(); | |
b8e383d5 KG |
103 | if (ppc_md.restart) |
104 | ppc_md.restart(cmd); | |
03501dab PM |
105 | #ifdef CONFIG_SMP |
106 | smp_send_stop(); | |
107 | #endif | |
108 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
109 | local_irq_disable(); | |
110 | while (1) ; | |
111 | } | |
112 | ||
113 | void machine_power_off(void) | |
114 | { | |
115 | machine_shutdown(); | |
b8e383d5 KG |
116 | if (ppc_md.power_off) |
117 | ppc_md.power_off(); | |
03501dab PM |
118 | #ifdef CONFIG_SMP |
119 | smp_send_stop(); | |
120 | #endif | |
121 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
122 | local_irq_disable(); | |
123 | while (1) ; | |
124 | } | |
125 | /* Used by the G5 thermal driver */ | |
126 | EXPORT_SYMBOL_GPL(machine_power_off); | |
127 | ||
128 | void (*pm_power_off)(void) = machine_power_off; | |
129 | EXPORT_SYMBOL_GPL(pm_power_off); | |
130 | ||
131 | void machine_halt(void) | |
132 | { | |
133 | machine_shutdown(); | |
b8e383d5 KG |
134 | if (ppc_md.halt) |
135 | ppc_md.halt(); | |
03501dab PM |
136 | #ifdef CONFIG_SMP |
137 | smp_send_stop(); | |
138 | #endif | |
139 | printk(KERN_EMERG "System Halted, OK to turn off power\n"); | |
140 | local_irq_disable(); | |
141 | while (1) ; | |
142 | } | |
143 | ||
144 | ||
145 | #ifdef CONFIG_TAU | |
146 | extern u32 cpu_temp(unsigned long cpu); | |
147 | extern u32 cpu_temp_both(unsigned long cpu); | |
148 | #endif /* CONFIG_TAU */ | |
149 | ||
150 | #ifdef CONFIG_SMP | |
151 | DEFINE_PER_CPU(unsigned int, pvr); | |
152 | #endif | |
153 | ||
154 | static int show_cpuinfo(struct seq_file *m, void *v) | |
155 | { | |
156 | unsigned long cpu_id = (unsigned long)v - 1; | |
157 | unsigned int pvr; | |
158 | unsigned short maj; | |
159 | unsigned short min; | |
160 | ||
161 | if (cpu_id == NR_CPUS) { | |
162 | #if defined(CONFIG_SMP) && defined(CONFIG_PPC32) | |
163 | unsigned long bogosum = 0; | |
164 | int i; | |
394e3902 AM |
165 | for_each_online_cpu(i) |
166 | bogosum += loops_per_jiffy; | |
03501dab PM |
167 | seq_printf(m, "total bogomips\t: %lu.%02lu\n", |
168 | bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); | |
169 | #endif /* CONFIG_SMP && CONFIG_PPC32 */ | |
170 | seq_printf(m, "timebase\t: %lu\n", ppc_tb_freq); | |
171 | ||
172 | if (ppc_md.show_cpuinfo != NULL) | |
173 | ppc_md.show_cpuinfo(m); | |
174 | ||
175 | return 0; | |
176 | } | |
177 | ||
178 | /* We only show online cpus: disable preempt (overzealous, I | |
179 | * knew) to prevent cpu going down. */ | |
180 | preempt_disable(); | |
181 | if (!cpu_online(cpu_id)) { | |
182 | preempt_enable(); | |
183 | return 0; | |
184 | } | |
185 | ||
186 | #ifdef CONFIG_SMP | |
03501dab | 187 | pvr = per_cpu(pvr, cpu_id); |
03501dab PM |
188 | #else |
189 | pvr = mfspr(SPRN_PVR); | |
190 | #endif | |
191 | maj = (pvr >> 8) & 0xFF; | |
192 | min = pvr & 0xFF; | |
193 | ||
194 | seq_printf(m, "processor\t: %lu\n", cpu_id); | |
195 | seq_printf(m, "cpu\t\t: "); | |
196 | ||
197 | if (cur_cpu_spec->pvr_mask) | |
198 | seq_printf(m, "%s", cur_cpu_spec->cpu_name); | |
199 | else | |
200 | seq_printf(m, "unknown (%08x)", pvr); | |
201 | ||
202 | #ifdef CONFIG_ALTIVEC | |
203 | if (cpu_has_feature(CPU_FTR_ALTIVEC)) | |
204 | seq_printf(m, ", altivec supported"); | |
205 | #endif /* CONFIG_ALTIVEC */ | |
206 | ||
207 | seq_printf(m, "\n"); | |
208 | ||
209 | #ifdef CONFIG_TAU | |
210 | if (cur_cpu_spec->cpu_features & CPU_FTR_TAU) { | |
211 | #ifdef CONFIG_TAU_AVERAGE | |
212 | /* more straightforward, but potentially misleading */ | |
213 | seq_printf(m, "temperature \t: %u C (uncalibrated)\n", | |
bccfd588 | 214 | cpu_temp(cpu_id)); |
03501dab PM |
215 | #else |
216 | /* show the actual temp sensor range */ | |
217 | u32 temp; | |
bccfd588 | 218 | temp = cpu_temp_both(cpu_id); |
03501dab PM |
219 | seq_printf(m, "temperature \t: %u-%u C (uncalibrated)\n", |
220 | temp & 0xff, temp >> 16); | |
221 | #endif | |
222 | } | |
223 | #endif /* CONFIG_TAU */ | |
224 | ||
225 | /* | |
226 | * Assume here that all clock rates are the same in a | |
227 | * smp system. -- Cort | |
228 | */ | |
229 | if (ppc_proc_freq) | |
230 | seq_printf(m, "clock\t\t: %lu.%06luMHz\n", | |
231 | ppc_proc_freq / 1000000, ppc_proc_freq % 1000000); | |
232 | ||
233 | if (ppc_md.show_percpuinfo != NULL) | |
234 | ppc_md.show_percpuinfo(m, cpu_id); | |
235 | ||
236 | /* If we are a Freescale core do a simple check so | |
237 | * we dont have to keep adding cases in the future */ | |
238 | if (PVR_VER(pvr) & 0x8000) { | |
239 | maj = PVR_MAJ(pvr); | |
240 | min = PVR_MIN(pvr); | |
241 | } else { | |
242 | switch (PVR_VER(pvr)) { | |
243 | case 0x0020: /* 403 family */ | |
244 | maj = PVR_MAJ(pvr) + 1; | |
245 | min = PVR_MIN(pvr); | |
246 | break; | |
247 | case 0x1008: /* 740P/750P ?? */ | |
248 | maj = ((pvr >> 8) & 0xFF) - 1; | |
249 | min = pvr & 0xFF; | |
250 | break; | |
251 | default: | |
252 | maj = (pvr >> 8) & 0xFF; | |
253 | min = pvr & 0xFF; | |
254 | break; | |
255 | } | |
256 | } | |
257 | ||
258 | seq_printf(m, "revision\t: %hd.%hd (pvr %04x %04x)\n", | |
259 | maj, min, PVR_VER(pvr), PVR_REV(pvr)); | |
260 | ||
261 | #ifdef CONFIG_PPC32 | |
262 | seq_printf(m, "bogomips\t: %lu.%02lu\n", | |
263 | loops_per_jiffy / (500000/HZ), | |
264 | (loops_per_jiffy / (5000/HZ)) % 100); | |
265 | #endif | |
266 | ||
267 | #ifdef CONFIG_SMP | |
268 | seq_printf(m, "\n"); | |
269 | #endif | |
270 | ||
271 | preempt_enable(); | |
272 | return 0; | |
273 | } | |
274 | ||
275 | static void *c_start(struct seq_file *m, loff_t *pos) | |
276 | { | |
277 | unsigned long i = *pos; | |
278 | ||
279 | return i <= NR_CPUS ? (void *)(i + 1) : NULL; | |
280 | } | |
281 | ||
282 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
283 | { | |
284 | ++*pos; | |
285 | return c_start(m, pos); | |
286 | } | |
287 | ||
288 | static void c_stop(struct seq_file *m, void *v) | |
289 | { | |
290 | } | |
291 | ||
292 | struct seq_operations cpuinfo_op = { | |
293 | .start =c_start, | |
294 | .next = c_next, | |
295 | .stop = c_stop, | |
296 | .show = show_cpuinfo, | |
297 | }; | |
298 | ||
a82765b6 DW |
299 | void __init check_for_initrd(void) |
300 | { | |
301 | #ifdef CONFIG_BLK_DEV_INITRD | |
302 | unsigned long *prop; | |
303 | ||
304 | DBG(" -> check_for_initrd()\n"); | |
305 | ||
306 | if (of_chosen) { | |
307 | prop = (unsigned long *)get_property(of_chosen, | |
308 | "linux,initrd-start", NULL); | |
309 | if (prop != NULL) { | |
310 | initrd_start = (unsigned long)__va(*prop); | |
311 | prop = (unsigned long *)get_property(of_chosen, | |
312 | "linux,initrd-end", NULL); | |
313 | if (prop != NULL) { | |
314 | initrd_end = (unsigned long)__va(*prop); | |
315 | initrd_below_start_ok = 1; | |
316 | } else | |
317 | initrd_start = 0; | |
318 | } | |
319 | } | |
320 | ||
321 | /* If we were passed an initrd, set the ROOT_DEV properly if the values | |
322 | * look sensible. If not, clear initrd reference. | |
323 | */ | |
51fae6de | 324 | if (is_kernel_addr(initrd_start) && is_kernel_addr(initrd_end) && |
a82765b6 DW |
325 | initrd_end > initrd_start) |
326 | ROOT_DEV = Root_RAM0; | |
6761c4a0 | 327 | else |
a82765b6 | 328 | initrd_start = initrd_end = 0; |
a82765b6 DW |
329 | |
330 | if (initrd_start) | |
331 | printk("Found initrd at 0x%lx:0x%lx\n", initrd_start, initrd_end); | |
332 | ||
333 | DBG(" <- check_for_initrd()\n"); | |
334 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
335 | } | |
336 | ||
5ad57078 PM |
337 | #ifdef CONFIG_SMP |
338 | ||
339 | /** | |
340 | * setup_cpu_maps - initialize the following cpu maps: | |
341 | * cpu_possible_map | |
342 | * cpu_present_map | |
343 | * cpu_sibling_map | |
344 | * | |
345 | * Having the possible map set up early allows us to restrict allocations | |
346 | * of things like irqstacks to num_possible_cpus() rather than NR_CPUS. | |
347 | * | |
348 | * We do not initialize the online map here; cpus set their own bits in | |
349 | * cpu_online_map as they come up. | |
350 | * | |
351 | * This function is valid only for Open Firmware systems. finish_device_tree | |
352 | * must be called before using this. | |
353 | * | |
354 | * While we're here, we may as well set the "physical" cpu ids in the paca. | |
355 | */ | |
356 | void __init smp_setup_cpu_maps(void) | |
357 | { | |
358 | struct device_node *dn = NULL; | |
359 | int cpu = 0; | |
360 | int swap_cpuid = 0; | |
361 | ||
362 | while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) { | |
363 | int *intserv; | |
364 | int j, len = sizeof(u32), nthreads = 1; | |
365 | ||
366 | intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s", | |
367 | &len); | |
368 | if (intserv) | |
369 | nthreads = len / sizeof(int); | |
370 | else { | |
371 | intserv = (int *) get_property(dn, "reg", NULL); | |
372 | if (!intserv) | |
373 | intserv = &cpu; /* assume logical == phys */ | |
374 | } | |
375 | ||
376 | for (j = 0; j < nthreads && cpu < NR_CPUS; j++) { | |
377 | cpu_set(cpu, cpu_present_map); | |
378 | set_hard_smp_processor_id(cpu, intserv[j]); | |
379 | ||
380 | if (intserv[j] == boot_cpuid_phys) | |
381 | swap_cpuid = cpu; | |
382 | cpu_set(cpu, cpu_possible_map); | |
383 | cpu++; | |
384 | } | |
385 | } | |
386 | ||
387 | /* Swap CPU id 0 with boot_cpuid_phys, so we can always assume that | |
388 | * boot cpu is logical 0. | |
389 | */ | |
390 | if (boot_cpuid_phys != get_hard_smp_processor_id(0)) { | |
391 | u32 tmp; | |
392 | tmp = get_hard_smp_processor_id(0); | |
393 | set_hard_smp_processor_id(0, boot_cpuid_phys); | |
394 | set_hard_smp_processor_id(swap_cpuid, tmp); | |
395 | } | |
396 | ||
397 | #ifdef CONFIG_PPC64 | |
398 | /* | |
399 | * On pSeries LPAR, we need to know how many cpus | |
400 | * could possibly be added to this partition. | |
401 | */ | |
799d6046 PM |
402 | if (_machine == PLATFORM_PSERIES_LPAR && |
403 | (dn = of_find_node_by_path("/rtas"))) { | |
5ad57078 PM |
404 | int num_addr_cell, num_size_cell, maxcpus; |
405 | unsigned int *ireg; | |
406 | ||
407 | num_addr_cell = prom_n_addr_cells(dn); | |
408 | num_size_cell = prom_n_size_cells(dn); | |
409 | ||
410 | ireg = (unsigned int *) | |
411 | get_property(dn, "ibm,lrdr-capacity", NULL); | |
412 | ||
413 | if (!ireg) | |
414 | goto out; | |
415 | ||
416 | maxcpus = ireg[num_addr_cell + num_size_cell]; | |
417 | ||
418 | /* Double maxcpus for processors which have SMT capability */ | |
419 | if (cpu_has_feature(CPU_FTR_SMT)) | |
420 | maxcpus *= 2; | |
421 | ||
422 | if (maxcpus > NR_CPUS) { | |
423 | printk(KERN_WARNING | |
424 | "Partition configured for %d cpus, " | |
425 | "operating system maximum is %d.\n", | |
426 | maxcpus, NR_CPUS); | |
427 | maxcpus = NR_CPUS; | |
428 | } else | |
429 | printk(KERN_INFO "Partition configured for %d cpus.\n", | |
430 | maxcpus); | |
431 | ||
432 | for (cpu = 0; cpu < maxcpus; cpu++) | |
433 | cpu_set(cpu, cpu_possible_map); | |
434 | out: | |
435 | of_node_put(dn); | |
436 | } | |
437 | ||
438 | /* | |
439 | * Do the sibling map; assume only two threads per processor. | |
440 | */ | |
441 | for_each_cpu(cpu) { | |
442 | cpu_set(cpu, cpu_sibling_map[cpu]); | |
443 | if (cpu_has_feature(CPU_FTR_SMT)) | |
444 | cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); | |
445 | } | |
446 | ||
a7f290da | 447 | vdso_data->processorCount = num_present_cpus(); |
5ad57078 PM |
448 | #endif /* CONFIG_PPC64 */ |
449 | } | |
450 | #endif /* CONFIG_SMP */ | |
fca5dcd4 PM |
451 | |
452 | #ifdef CONFIG_XMON | |
453 | static int __init early_xmon(char *p) | |
454 | { | |
455 | /* ensure xmon is enabled */ | |
456 | if (p) { | |
457 | if (strncmp(p, "on", 2) == 0) | |
458 | xmon_init(1); | |
459 | if (strncmp(p, "off", 3) == 0) | |
460 | xmon_init(0); | |
461 | if (strncmp(p, "early", 5) != 0) | |
462 | return 0; | |
463 | } | |
464 | xmon_init(1); | |
465 | debugger(NULL); | |
466 | ||
467 | return 0; | |
468 | } | |
469 | early_param("xmon", early_xmon); | |
470 | #endif |