aboutsummaryrefslogtreecommitdiffstats
path: root/arch/mips/kernel/smtc-proc.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/kernel/smtc-proc.c')
-rw-r--r--arch/mips/kernel/smtc-proc.c93
1 files changed, 93 insertions, 0 deletions
diff --git a/arch/mips/kernel/smtc-proc.c b/arch/mips/kernel/smtc-proc.c
new file mode 100644
index 000000000000..6f3709996172
--- /dev/null
+++ b/arch/mips/kernel/smtc-proc.c
@@ -0,0 +1,93 @@
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}