From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/mips/kernel/smtc-proc.c | 79 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 arch/mips/kernel/smtc-proc.c

(limited to 'arch/mips/kernel/smtc-proc.c')

diff --git a/arch/mips/kernel/smtc-proc.c b/arch/mips/kernel/smtc-proc.c
new file mode 100644
index 00000000..c10aa84c
--- /dev/null
+++ b/arch/mips/kernel/smtc-proc.c
@@ -0,0 +1,79 @@
+/*
+ * /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 <linux/atomic.h>
+#include <asm/hardirq.h>
+#include <asm/mmu_context.h>
+#include <asm/mipsregs.h>
+#include <asm/cacheflush.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.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];
+
+atomic_t smtc_fpu_recoveries;
+
+static int smtc_proc_show(struct seq_file *m, void *v)
+{
+	int i;
+	extern unsigned long ebase;
+
+	seq_printf(m, "SMTC Status Word: 0x%08x\n", smtc_status);
+	seq_printf(m, "Config7: 0x%08x\n", read_c0_config7());
+	seq_printf(m, "EBASE: 0x%08lx\n", ebase);
+	seq_printf(m, "Counter Interrupts taken per CPU (TC)\n");
+	for (i=0; i < NR_CPUS; i++)
+		seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].timerints);
+	seq_printf(m, "Self-IPIs by CPU:\n");
+	for(i = 0; i < NR_CPUS; i++)
+		seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis);
+	seq_printf(m, "%d Recoveries of \"stolen\" FPU\n",
+		   atomic_read(&smtc_fpu_recoveries));
+	return 0;
+}
+
+static int smtc_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, smtc_proc_show, NULL);
+}
+
+static const struct file_operations smtc_proc_fops = {
+	.open		= smtc_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+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);
+
+	proc_create("smtc", 0444, NULL, &smtc_proc_fops);
+}
-- 
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