2 * Copyright IBM Corp. 2008
3 * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
6 #define KMSG_COMPONENT "cpu"
7 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/smp.h>
12 #include <linux/seq_file.h>
13 #include <linux/delay.h>
14 #include <linux/cpu.h>
16 #include <asm/lowcore.h>
17 #include <asm/param.h>
19 static DEFINE_PER_CPU(struct cpuid, cpu_id);
22 * cpu_init - initializes state that is per-CPU.
26 struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
27 struct cpuid *id = &__get_cpu_var(cpu_id);
30 atomic_inc(&init_mm.mm_count);
31 current->active_mm = &init_mm;
33 enter_lazy_tlb(&init_mm, current);
34 memset(idle, 0, sizeof(*idle));
38 * show_cpuinfo - Get information on one CPU for use by procfs.
40 static int show_cpuinfo(struct seq_file *m, void *v)
42 static const char *hwcap_str[] = {
43 "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
44 "edat", "etf3eh", "highgprs", "te"
46 unsigned long n = (unsigned long) v - 1;
50 s390_adjust_jiffies();
51 seq_printf(m, "vendor_id : IBM/S390\n"
53 "bogomips per cpu: %lu.%02lu\n",
54 num_online_cpus(), loops_per_jiffy/(500000/HZ),
55 (loops_per_jiffy/(5000/HZ))%100);
56 seq_puts(m, "features\t: ");
57 for (i = 0; i < ARRAY_SIZE(hwcap_str); i++)
58 if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
59 seq_printf(m, "%s ", hwcap_str[i]);
65 struct cpuid *id = &per_cpu(cpu_id, n);
66 seq_printf(m, "processor %li: "
68 "identification = %06X, "
70 n, id->version, id->ident, id->machine);
76 static void *c_start(struct seq_file *m, loff_t *pos)
78 return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
81 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
84 return c_start(m, pos);
87 static void c_stop(struct seq_file *m, void *v)
91 const struct seq_operations cpuinfo_op = {