setup-common.c (0612ec48762bf8712db1925b2e67246d2237ebab) setup-common.c (a4dc7ff08915a2035aa6d6decc53fa1deaa410bb)
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

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299 .next = c_next,
300 .stop = c_stop,
301 .show = show_cpuinfo,
302};
303
304void __init check_for_initrd(void)
305{
306#ifdef CONFIG_BLK_DEV_INITRD
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

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299 .next = c_next,
300 .stop = c_stop,
301 .show = show_cpuinfo,
302};
303
304void __init check_for_initrd(void)
305{
306#ifdef CONFIG_BLK_DEV_INITRD
307 unsigned long *prop;
307 const unsigned int *prop;
308 int len;
308
309 DBG(" -> check_for_initrd()\n");
310
311 if (of_chosen) {
309
310 DBG(" -> check_for_initrd()\n");
311
312 if (of_chosen) {
312 prop = (unsigned long *)get_property(of_chosen,
313 "linux,initrd-start", NULL);
313 prop = get_property(of_chosen, "linux,initrd-start", &len);
314 if (prop != NULL) {
314 if (prop != NULL) {
315 initrd_start = (unsigned long)__va(*prop);
316 prop = (unsigned long *)get_property(of_chosen,
317 "linux,initrd-end", NULL);
315 initrd_start = (unsigned long)
316 __va(of_read_ulong(prop, len / 4));
317 prop = get_property(of_chosen,
318 "linux,initrd-end", &len);
318 if (prop != NULL) {
319 if (prop != NULL) {
319 initrd_end = (unsigned long)__va(*prop);
320 initrd_end = (unsigned long)
321 __va(of_read_ulong(prop, len / 4));
320 initrd_below_start_ok = 1;
321 } else
322 initrd_start = 0;
323 }
324 }
325
326 /* If we were passed an initrd, set the ROOT_DEV properly if the values
327 * look sensible. If not, clear initrd reference.

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361 * NOTE: This must match the parsing done in early_init_dt_scan_cpus.
362 */
363void __init smp_setup_cpu_maps(void)
364{
365 struct device_node *dn = NULL;
366 int cpu = 0;
367
368 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
322 initrd_below_start_ok = 1;
323 } else
324 initrd_start = 0;
325 }
326 }
327
328 /* If we were passed an initrd, set the ROOT_DEV properly if the values
329 * look sensible. If not, clear initrd reference.

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363 * NOTE: This must match the parsing done in early_init_dt_scan_cpus.
364 */
365void __init smp_setup_cpu_maps(void)
366{
367 struct device_node *dn = NULL;
368 int cpu = 0;
369
370 while ((dn = of_find_node_by_type(dn, "cpu")) && cpu < NR_CPUS) {
369 int *intserv;
371 const int *intserv;
370 int j, len = sizeof(u32), nthreads = 1;
371
372 int j, len = sizeof(u32), nthreads = 1;
373
372 intserv = (int *)get_property(dn, "ibm,ppc-interrupt-server#s",
373 &len);
374 intserv = get_property(dn, "ibm,ppc-interrupt-server#s", &len);
374 if (intserv)
375 nthreads = len / sizeof(int);
376 else {
375 if (intserv)
376 nthreads = len / sizeof(int);
377 else {
377 intserv = (int *) get_property(dn, "reg", NULL);
378 intserv = get_property(dn, "reg", NULL);
378 if (!intserv)
379 intserv = &cpu; /* assume logical == phys */
380 }
381
382 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
383 cpu_set(cpu, cpu_present_map);
384 set_hard_smp_processor_id(cpu, intserv[j]);
385 cpu_set(cpu, cpu_possible_map);

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390#ifdef CONFIG_PPC64
391 /*
392 * On pSeries LPAR, we need to know how many cpus
393 * could possibly be added to this partition.
394 */
395 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) &&
396 (dn = of_find_node_by_path("/rtas"))) {
397 int num_addr_cell, num_size_cell, maxcpus;
379 if (!intserv)
380 intserv = &cpu; /* assume logical == phys */
381 }
382
383 for (j = 0; j < nthreads && cpu < NR_CPUS; j++) {
384 cpu_set(cpu, cpu_present_map);
385 set_hard_smp_processor_id(cpu, intserv[j]);
386 cpu_set(cpu, cpu_possible_map);

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391#ifdef CONFIG_PPC64
392 /*
393 * On pSeries LPAR, we need to know how many cpus
394 * could possibly be added to this partition.
395 */
396 if (machine_is(pseries) && firmware_has_feature(FW_FEATURE_LPAR) &&
397 (dn = of_find_node_by_path("/rtas"))) {
398 int num_addr_cell, num_size_cell, maxcpus;
398 unsigned int *ireg;
399 const unsigned int *ireg;
399
400 num_addr_cell = prom_n_addr_cells(dn);
401 num_size_cell = prom_n_size_cells(dn);
402
400
401 num_addr_cell = prom_n_addr_cells(dn);
402 num_size_cell = prom_n_size_cells(dn);
403
403 ireg = (unsigned int *)
404 get_property(dn, "ibm,lrdr-capacity", NULL);
404 ireg = get_property(dn, "ibm,lrdr-capacity", NULL);
405
406 if (!ireg)
407 goto out;
408
409 maxcpus = ireg[num_addr_cell + num_size_cell];
410
411 /* Double maxcpus for processors which have SMT capability */
412 if (cpu_has_feature(CPU_FTR_SMT))

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439
440 vdso_data->processorCount = num_present_cpus();
441#endif /* CONFIG_PPC64 */
442}
443#endif /* CONFIG_SMP */
444
445int __initdata do_early_xmon;
446#ifdef CONFIG_XMON
405
406 if (!ireg)
407 goto out;
408
409 maxcpus = ireg[num_addr_cell + num_size_cell];
410
411 /* Double maxcpus for processors which have SMT capability */
412 if (cpu_has_feature(CPU_FTR_SMT))

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439
440 vdso_data->processorCount = num_present_cpus();
441#endif /* CONFIG_PPC64 */
442}
443#endif /* CONFIG_SMP */
444
445int __initdata do_early_xmon;
446#ifdef CONFIG_XMON
447extern int xmon_no_auto_backtrace;
448
447static int __init early_xmon(char *p)
448{
449 /* ensure xmon is enabled */
450 if (p) {
451 if (strncmp(p, "on", 2) == 0)
452 xmon_init(1);
453 if (strncmp(p, "off", 3) == 0)
454 xmon_init(0);
449static int __init early_xmon(char *p)
450{
451 /* ensure xmon is enabled */
452 if (p) {
453 if (strncmp(p, "on", 2) == 0)
454 xmon_init(1);
455 if (strncmp(p, "off", 3) == 0)
456 xmon_init(0);
457 if (strncmp(p, "nobt", 4) == 0)
458 xmon_no_auto_backtrace = 1;
455 if (strncmp(p, "early", 5) != 0)
456 return 0;
457 }
458 xmon_init(1);
459 do_early_xmon = 1;
460
461 return 0;
462}

--- 81 unchanged lines hidden --- 		459 if (strncmp(p, "early", 5) != 0)
460 return 0;
461 }
462 xmon_init(1);
463 do_early_xmon = 1;
464
465 return 0;
466}

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