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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/tile/lib/delay.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/tile/lib/delay.c')
-rw-r--r--kernel/arch/tile/lib/delay.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/kernel/arch/tile/lib/delay.c b/kernel/arch/tile/lib/delay.c
new file mode 100644
index 000000000..cdacdd11d
--- /dev/null
+++ b/kernel/arch/tile/lib/delay.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/thread_info.h>
+#include <asm/timex.h>
+
+void __udelay(unsigned long usecs)
+{
+ if (usecs > ULONG_MAX / 1000) {
+ WARN_ON_ONCE(usecs > ULONG_MAX / 1000);
+ usecs = ULONG_MAX / 1000;
+ }
+ __ndelay(usecs * 1000);
+}
+EXPORT_SYMBOL(__udelay);
+
+void __ndelay(unsigned long nsecs)
+{
+ cycles_t target = get_cycles();
+ target += ns2cycles(nsecs);
+ while (get_cycles() < target)
+ cpu_relax();
+}
+EXPORT_SYMBOL(__ndelay);
+
+void __delay(unsigned long cycles)
+{
+ cycles_t target = get_cycles() + cycles;
+ while (get_cycles() < target)
+ cpu_relax();
+}
+EXPORT_SYMBOL(__delay);