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authorRalf Baechle <ralf@linux-mips.org>2006-04-05 09:45:45 +0100
committerRalf Baechle <ralf@linux-mips.org>2006-04-19 04:14:28 +0200
commit41c594ab65fc89573af296d192aa5235d09717ab (patch)
tree562462512a320f386bdf49eabfbb26bb3ee761fa /arch/mips/kernel/smtc-proc.c
parent2600990e640e3bef29ed89d565864cf16ee83833 (diff)
[MIPS] MT: Improved multithreading support.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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 @@
+/*
+ * /proc hooks for SMTC kernel
+ * Copyright (C) 2005 Mips Technologies, Inc
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/cpumask.h>
+#include <linux/interrupt.h>
+
+#include <asm/cpu.h>
+#include <asm/processor.h>
+#include <asm/atomic.h>
+#include <asm/system.h>
+#include <asm/hardirq.h>
+#include <asm/mmu_context.h>
+#include <asm/smp.h>
+#include <asm/mipsregs.h>
+#include <asm/cacheflush.h>
+#include <linux/proc_fs.h>
+
+#include <asm/smtc_proc.h>
+
+/*
+ * /proc diagnostic and statistics hooks
+ */
+
+/*
+ * Statistics gathered
+ */
+unsigned long selfipis[NR_CPUS];
+
+struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS];
+
+static struct proc_dir_entry *smtc_stats;
+
+atomic_t smtc_fpu_recoveries;
+
+static int proc_read_smtc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ int totalen = 0;
+ int len;
+ int i;
+ extern unsigned long ebase;
+
+ len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status);
+ totalen += len;
+ page += len;
+ len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7());
+ totalen += len;
+ page += len;
+ len = sprintf(page, "EBASE: 0x%08lx\n", ebase);
+ totalen += len;
+ page += len;
+ len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n");
+ totalen += len;
+ page += len;
+ for (i=0; i < NR_CPUS; i++) {
+ len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
+ totalen += len;
+ page += len;
+ }
+ len = sprintf(page, "Self-IPIs by CPU:\n");
+ totalen += len;
+ page += len;
+ for(i = 0; i < NR_CPUS; i++) {
+ len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
+ totalen += len;
+ page += len;
+ }
+ len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n",
+ atomic_read(&smtc_fpu_recoveries));
+ totalen += len;
+ page += len;
+
+ return totalen;
+}
+
+void init_smtc_stats(void)
+{
+ int i;
+
+ for (i=0; i<NR_CPUS; i++) {
+ smtc_cpu_stats[i].timerints = 0;
+ smtc_cpu_stats[i].selfipis = 0;
+ }
+
+ atomic_set(&smtc_fpu_recoveries, 0);
+
+ smtc_stats = create_proc_read_entry("smtc", 0444, NULL,
+ proc_read_smtc, NULL);
+}

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