1/*
 2 * /proc hooks for SMTC kernel
 3 * Copyright (C) 2005 Mips Technologies, Inc
 4 */
 5
 6#include <linux/kernel.h>
 7#include <linux/sched.h>
 8#include <linux/cpumask.h>
 9#include <linux/interrupt.h>
10
11#include <asm/cpu.h>
12#include <asm/processor.h>
13#include <linux/atomic.h>
14#include <asm/system.h>
15#include <asm/hardirq.h>
16#include <asm/mmu_context.h>
17#include <asm/mipsregs.h>
18#include <asm/cacheflush.h>
19#include <linux/proc_fs.h>
 
20
21#include <asm/smtc_proc.h>
22
23/*
24 * /proc diagnostic and statistics hooks
25 */
26
27/*
28 * Statistics gathered
29 */
30unsigned long selfipis[NR_CPUS];
31
32struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS];
33
34static struct proc_dir_entry *smtc_stats;
35
36atomic_t smtc_fpu_recoveries;
37
38static int proc_read_smtc(char *page, char **start, off_t off,
39                          int count, int *eof, void *data)
40{
41	int totalen = 0;
42	int len;
43	int i;
44	extern unsigned long ebase;
45
46	len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status);
47	totalen += len;
48	page += len;
49	len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7());
50	totalen += len;
51	page += len;
52	len = sprintf(page, "EBASE: 0x%08lx\n", ebase);
53	totalen += len;
54	page += len;
55	len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n");
56	totalen += len;
57	page += len;
58	for (i=0; i < NR_CPUS; i++) {
59		len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
60		totalen += len;
61		page += len;
62	}
63	len = sprintf(page, "Self-IPIs by CPU:\n");
64	totalen += len;
65	page += len;
66	for(i = 0; i < NR_CPUS; i++) {
67		len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
68		totalen += len;
69		page += len;
70	}
71	len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n",
72	              atomic_read(&smtc_fpu_recoveries));
73	totalen += len;
74	page += len;
75
76	return totalen;
 
 
77}
78
 
 
 
 
 
 
 
79void init_smtc_stats(void)
80{
81	int i;
82
83	for (i=0; i<NR_CPUS; i++) {
84		smtc_cpu_stats[i].timerints = 0;
85		smtc_cpu_stats[i].selfipis = 0;
86	}
87
88	atomic_set(&smtc_fpu_recoveries, 0);
89
90	smtc_stats = create_proc_read_entry("smtc", 0444, NULL,
91	                                    proc_read_smtc, NULL);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
92}

  1/*
  2 * /proc hooks for SMTC kernel
  3 * Copyright (C) 2005 Mips Technologies, Inc
  4 */
  5
  6#include <linux/kernel.h>
  7#include <linux/sched.h>
  8#include <linux/cpumask.h>
  9#include <linux/interrupt.h>
 10
 11#include <asm/cpu.h>
 12#include <asm/processor.h>
 13#include <linux/atomic.h>
 
 14#include <asm/hardirq.h>
 15#include <asm/mmu_context.h>
 16#include <asm/mipsregs.h>
 17#include <asm/cacheflush.h>
 18#include <linux/proc_fs.h>
 19#include <linux/seq_file.h>
 20
 21#include <asm/smtc_proc.h>
 22
 23/*
 24 * /proc diagnostic and statistics hooks
 25 */
 26
 27/*
 28 * Statistics gathered
 29 */
 30unsigned long selfipis[NR_CPUS];
 31
 32struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS];
 33
 
 
 34atomic_t smtc_fpu_recoveries;
 35
 36static int smtc_proc_show(struct seq_file *m, void *v)
 
 37{
 
 
 38	int i;
 39	extern unsigned long ebase;
 40
 41	seq_printf(m, "SMTC Status Word: 0x%08x\n", smtc_status);
 42	seq_printf(m, "Config7: 0x%08x\n", read_c0_config7());
 43	seq_printf(m, "EBASE: 0x%08lx\n", ebase);
 44	seq_printf(m, "Counter Interrupts taken per CPU (TC)\n");
 45	for (i=0; i < NR_CPUS; i++)
 46		seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
 47	seq_printf(m, "Self-IPIs by CPU:\n");
 48	for(i = 0; i < NR_CPUS; i++)
 49		seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
 50	seq_printf(m, "%d Recoveries of \"stolen\" FPU\n",
 51		   atomic_read(&smtc_fpu_recoveries));
 52	return 0;
 53}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 54
 55static int smtc_proc_open(struct inode *inode, struct file *file)
 56{
 57	return single_open(file, smtc_proc_show, NULL);
 58}
 59
 60static const struct file_operations smtc_proc_fops = {
 61	.open		= smtc_proc_open,
 62	.read		= seq_read,
 63	.llseek		= seq_lseek,
 64	.release	= single_release,
 65};
 66
 67void init_smtc_stats(void)
 68{
 69	int i;
 70
 71	for (i=0; i<NR_CPUS; i++) {
 72		smtc_cpu_stats[i].timerints = 0;
 73		smtc_cpu_stats[i].selfipis = 0;
 74	}
 75
 76	atomic_set(&smtc_fpu_recoveries, 0);
 77
 78	proc_create("smtc", 0444, NULL, &smtc_proc_fops);
 79}
 80
 81static int proc_cpuinfo_chain_call(struct notifier_block *nfb,
 82	unsigned long action_unused, void *data)
 83{
 84	struct proc_cpuinfo_notifier_args *pcn = data;
 85	struct seq_file *m = pcn->m;
 86	unsigned long n = pcn->n;
 87
 88	if (!cpu_has_mipsmt)
 89		return NOTIFY_OK;
 90
 91	seq_printf(m, "VPE\t\t\t: %d\n", cpu_data[n].vpe_id);
 92	seq_printf(m, "TC\t\t\t: %d\n", cpu_data[n].tc_id);
 93
 94	return NOTIFY_OK;
 95}
 96
 97static int __init proc_cpuinfo_notifier_init(void)
 98{
 99	return proc_cpuinfo_notifier(proc_cpuinfo_chain_call, 0);
100}
101
102subsys_initcall(proc_cpuinfo_notifier_init);