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>
16#include <linux/cpu.h>
17#include <asm/elf.h>
18#include <asm/lowcore.h>
19#include <asm/param.h>
20
21static DEFINE_PER_CPU(struct cpuid, cpu_id);
22
23/*
24 * cpu_init - initializes state that is per-CPU.
25 */
26void __cpuinit cpu_init(void)
27{
28	struct cpuid *id = &per_cpu(cpu_id, smp_processor_id());
29	struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
 
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);
36	memset(idle, 0, sizeof(*idle));
37}
38
39/*
40 * show_cpuinfo - Get information on one CPU for use by procfs.
41 */
42static int show_cpuinfo(struct seq_file *m, void *v)
43{
44	static const char *hwcap_str[10] = {
45		"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
46		"edat", "etf3eh", "highgprs"
47	};
48	unsigned long n = (unsigned long) v - 1;
49	int i;
50
51	if (!n) {
52		s390_adjust_jiffies();
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: ");
59		for (i = 0; i < 10; i++)
60			if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
61				seq_printf(m, "%s ", hwcap_str[i]);
62		seq_puts(m, "\n");
 
63	}
64	get_online_cpus();
65	if (cpu_online(n)) {
66		struct cpuid *id = &per_cpu(cpu_id, n);
67		seq_printf(m, "processor %li: "
68			   "version = %02X,  "
69			   "identification = %06X,  "
70			   "machine = %04X\n",
71			   n, id->version, id->ident, id->machine);
72	}
73	put_online_cpus();
74	return 0;
75}
76
77static void *c_start(struct seq_file *m, loff_t *pos)
78{
79	return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
80}
81
82static void *c_next(struct seq_file *m, void *v, loff_t *pos)
83{
84	++*pos;
85	return c_start(m, pos);
86}
87
88static void c_stop(struct seq_file *m, void *v)
89{
90}
91
92const struct seq_operations cpuinfo_op = {
93	.start	= c_start,
94	.next	= c_next,
95	.stop	= c_stop,
96	.show	= show_cpuinfo,
97};
98

 1/*
 
 
 2 *  Copyright IBM Corp. 2008
 3 *  Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
 4 */
 5
 6#define KMSG_COMPONENT "cpu"
 7#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
 8
 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>
15#include <asm/elf.h>
16#include <asm/lowcore.h>
17#include <asm/param.h>
18
19static DEFINE_PER_CPU(struct cpuid, cpu_id);
20
21/*
22 * cpu_init - initializes state that is per-CPU.
23 */
24void cpu_init(void)
25{
 
26	struct s390_idle_data *idle = &__get_cpu_var(s390_idle);
27	struct cpuid *id = &__get_cpu_var(cpu_id);
28
29	get_cpu_id(id);
30	atomic_inc(&init_mm.mm_count);
31	current->active_mm = &init_mm;
32	BUG_ON(current->mm);
33	enter_lazy_tlb(&init_mm, current);
34	memset(idle, 0, sizeof(*idle));
35}
36
37/*
38 * show_cpuinfo - Get information on one CPU for use by procfs.
39 */
40static int show_cpuinfo(struct seq_file *m, void *v)
41{
42	static const char *hwcap_str[] = {
43		"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
44		"edat", "etf3eh", "highgprs", "te"
45	};
46	unsigned long n = (unsigned long) v - 1;
47	int i;
48
49	if (!n) {
50		s390_adjust_jiffies();
51		seq_printf(m, "vendor_id       : IBM/S390\n"
52			   "# processors    : %i\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]);
60		seq_puts(m, "\n");
61		show_cacheinfo(m);
62	}
63	get_online_cpus();
64	if (cpu_online(n)) {
65		struct cpuid *id = &per_cpu(cpu_id, n);
66		seq_printf(m, "processor %li: "
67			   "version = %02X,  "
68			   "identification = %06X,  "
69			   "machine = %04X\n",
70			   n, id->version, id->ident, id->machine);
71	}
72	put_online_cpus();
73	return 0;
74}
75
76static void *c_start(struct seq_file *m, loff_t *pos)
77{
78	return *pos < nr_cpu_ids ? (void *)((unsigned long) *pos + 1) : NULL;
79}
80
81static void *c_next(struct seq_file *m, void *v, loff_t *pos)
82{
83	++*pos;
84	return c_start(m, pos);
85}
86
87static void c_stop(struct seq_file *m, void *v)
88{
89}
90
91const struct seq_operations cpuinfo_op = {
92	.start	= c_start,
93	.next	= c_next,
94	.stop	= c_stop,
95	.show	= show_cpuinfo,
96};
97