1 files changed, 51 insertions, 0 deletions

diff --git a/arch/mn10300/kernel/profile.c b/arch/mn10300/kernel/profile.c
new file mode 100644
index 000000000000..20d7d0306b16
--- /dev/null
+++ b/arch/mn10300/kernel/profile.c
@@ -0,0 +1,51 @@
+/* MN10300 Profiling setup
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+/*
+ * initialise the profiling if enabled
+ * - using with gdbstub will give anomalous results
+ * - can't be used with gdbstub if running at IRQ priority 0
+ */
+static __init int profile_init(void)
+{
+        u16 tmp;
+
+        if (!prof_buffer)
+                return 0;
+
+        /* use timer 11 to drive the profiling interrupts */
+        set_intr_stub(EXCEP_IRQ_LEVEL0, profile_handler);
+
+        /* set IRQ priority at which to run */
+        set_intr_level(TM11IRQ, GxICR_LEVEL_0);
+
+        /* set up timer 11
+         * - source: (IOCLK 33MHz)*2 = 66MHz
+         * - frequency: (33330000*2) / 8 / 20625 = 202Hz
+         */
+        TM11BR = 20625 - 1;
+        TM11MD = TM8MD_SRC_IOCLK_8;
+        TM11MD |= TM8MD_INIT_COUNTER;
+        TM11MD &= ~TM8MD_INIT_COUNTER;
+        TM11MD |= TM8MD_COUNT_ENABLE;
+
+        TM11ICR |= GxICR_ENABLE;
+        tmp = TM11ICR;
+
+        printk(KERN_INFO "Profiling initiated on timer 11, priority 0, %uHz\n",
+               mn10300_ioclk / 8 / (TM11BR + 1));
+        printk(KERN_INFO "Profile histogram stored %p-%p\n",
+               prof_buffer, (u8 *)(prof_buffer + prof_len) - 1);
+
+        return 0;
+}
+
+__initcall(profile_init);