projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 395d31d4 MS |
1 | /* |
| 2 | * arch/s390/kernel/processor.c | |
| 3 | * | |
| 4 | * Copyright IBM Corp. 2008 | |
| 5 | * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com) | |
| 6 | */ | |
| 7 | ||
| 8 | #define KMSG_COMPONENT "cpu" | |
| 9 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
| 10 | ||
| 11 | #include <linux/kernel.h> | |
| 12 | #include <linux/init.h> | |
| 13 | #include <linux/smp.h> | |
| 14 | #include <linux/seq_file.h> | |
| 15 | #include <linux/delay.h> | |
| 19726cec | 16 | #include <linux/cpu.h> |
| 395d31d4 MS |
17 | #include <asm/elf.h> |
| 18 | #include <asm/lowcore.h> | |
| 19 | #include <asm/param.h> | |
| 20 | ||
| 94038a99 MS |
21 | static DEFINE_PER_CPU(struct cpuid, cpu_id); |
| 22 | ||
| 23 | /* | |
| 24 | * cpu_init - initializes state that is per-CPU. | |
| 25 | */ | |
| 26 | void __cpuinit cpu_init(void) | |
| 27 | { | |
| 28 | struct cpuid *id = &per_cpu(cpu_id, smp_processor_id()); | |
| 0008204f | 29 | struct s390_idle_data *idle = &__get_cpu_var(s390_idle); |
| 94038a99 MS |
30 | |
| 31 | get_cpu_id(id); | |
| 32 | atomic_inc(&init_mm.mm_count); | |
| 33 | current->active_mm = &init_mm; | |
| 34 | BUG_ON(current->mm); | |
| 35 | enter_lazy_tlb(&init_mm, current); | |
| 0008204f | 36 | memset(idle, 0, sizeof(*idle)); |
| 94038a99 MS |
37 | } |
| 38 | ||
| 395d31d4 MS |
39 | /* |
| 40 | * show_cpuinfo - Get information on one CPU for use by procfs. | |
| 41 | */ | |
| 395d31d4 MS |
42 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 43 | { | |
| be6e3f9c | 44 | static const char *hwcap_str[10] = { |
| 395d31d4 | 45 | "esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp", |
| be6e3f9c | 46 | "edat", "etf3eh", "highgprs" |
| 395d31d4 | 47 | }; |
| 7b468488 MS |
48 | unsigned long n = (unsigned long) v - 1; |
| 49 | int i; | |
| 395d31d4 | 50 | |
| 7b468488 | 51 | if (!n) { |
| 8e102301 | 52 | s390_adjust_jiffies(); |
| 7b468488 MS |
53 | seq_printf(m, "vendor_id : IBM/S390\n" |
| 54 | "# processors : %i\n" | |
| 55 | "bogomips per cpu: %lu.%02lu\n", | |
| 56 | num_online_cpus(), loops_per_jiffy/(500000/HZ), | |
| 57 | (loops_per_jiffy/(5000/HZ))%100); | |
| 58 | seq_puts(m, "features\t: "); | |
| be6e3f9c | 59 | for (i = 0; i < 10; i++) |
| 7b468488 MS |
60 | if (hwcap_str[i] && (elf_hwcap & (1UL << i))) |
| 61 | seq_printf(m, "%s ", hwcap_str[i]); | |
| 62 | seq_puts(m, "\n"); | |
| 63 | } | |
| 19726cec | 64 | get_online_cpus(); |
| 7b468488 | 65 | if (cpu_online(n)) { |
| 94038a99 | 66 | struct cpuid *id = &per_cpu(cpu_id, n); |
| 7b468488 MS |
67 | seq_printf(m, "processor %li: " |
| 68 | "version = %02X, " | |
| 69 | "identification = %06X, " | |
| 70 | "machine = %04X\n", | |
| 94038a99 | 71 | n, id->version, id->ident, id->machine); |
| 7b468488 | 72 | } |
| 19726cec | 73 | put_online_cpus(); |
| 7b468488 | 74 | return 0; |
| 395d31d4 MS |
75 | } |
| 76 | ||
| 77 | static void *c_start(struct seq_file *m, loff_t *pos) | |
| 78 | { | |
| dd4a5a31 | 79 | return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL; |
| 395d31d4 MS |
80 | } |
| 81 | ||
| 82 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) | |
| 83 | { | |
| 84 | ++*pos; | |
| 85 | return c_start(m, pos); | |
| 86 | } | |
| 87 | ||
| 88 | static void c_stop(struct seq_file *m, void *v) | |
| 89 | { | |
| 90 | } | |
| 91 | ||
| 92 | const struct seq_operations cpuinfo_op = { | |
| 93 | .start = c_start, | |
| 94 | .next = c_next, | |
| 95 | .stop = c_stop, | |
| 96 | .show = show_cpuinfo, | |
| 97 | }; | |
| 98 |