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 <asm/atomic.h>
14#include <asm/system.h>
15#include <asm/hardirq.h>
16#include <asm/mmu_context.h>
17#include <asm/smp.h>
18#include <asm/mipsregs.h>
19#include <asm/cacheflush.h>
20#include <linux/proc_fs.h>
21
22#include <asm/smtc_proc.h>
23
24/*
25 * /proc diagnostic and statistics hooks
26 */
27
28/*
29 * Statistics gathered
30 */
31unsigned long selfipis[NR_CPUS];
32
33struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS];
34
35static struct proc_dir_entry *smtc_stats;
36
37atomic_t smtc_fpu_recoveries;
38
39static int proc_read_smtc(char *page, char **start, off_t off,
40                          int count, int *eof, void *data)
41{
42	int totalen = 0;
43	int len;
44	int i;
45	extern unsigned long ebase;
46
47	len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status);
48	totalen += len;
49	page += len;
50	len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7());
51	totalen += len;
52	page += len;
53	len = sprintf(page, "EBASE: 0x%08lx\n", ebase);
54	totalen += len;
55	page += len;
56	len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n");
57	totalen += len;
58	page += len;
59	for (i=0; i < NR_CPUS; i++) {
60		len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
61		totalen += len;
62		page += len;
63	}
64	len = sprintf(page, "Self-IPIs by CPU:\n");
65	totalen += len;
66	page += len;
67	for(i = 0; i < NR_CPUS; i++) {
68		len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
69		totalen += len;
70		page += len;
71	}
72	len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n",
73	              atomic_read(&smtc_fpu_recoveries));
74	totalen += len;
75	page += len;
76
77	return totalen;
78}
79
80void init_smtc_stats(void)
81{
82	int i;
83
84	for (i=0; i<NR_CPUS; i++) {
85		smtc_cpu_stats[i].timerints = 0;
86		smtc_cpu_stats[i].selfipis = 0;
87	}
88
89	atomic_set(&smtc_fpu_recoveries, 0);
90
91	smtc_stats = create_proc_read_entry("smtc", 0444, NULL,
92	                                    proc_read_smtc, NULL);
93}
94