1 files changed, 50 insertions, 0 deletions

diff --git a/include/asm-frv/delay.h b/include/asm-frv/delay.h
new file mode 100644
index 000000000000..597b4ebf03b4
--- /dev/null
+++ b/include/asm-frv/delay.h
@@ -0,0 +1,50 @@
+/* delay.h: FRV delay code
+ *
+ * Copyright (C) 2003 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 License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_DELAY_H
+#define _ASM_DELAY_H
+
+#include <asm/param.h>
+#include <asm/timer-regs.h>
+
+/*
+ * delay loop - runs at __core_clock_speed_HZ / 2 [there are 2 insns in the loop]
+ */
+extern unsigned long __delay_loops_MHz;
+
+static inline void __delay(unsigned long loops)
+{
+        asm volatile("1:        subicc  %0,#1,%0,icc0   \n"
+                     "          bnc     icc0,#2,1b      \n"
+                     : "=r" (loops)
+                     : "0" (loops)
+                     : "icc0"
+                     );
+}
+
+/*
+ * Use only for very small delays ( < 1 msec).  Should probably use a
+ * lookup table, really, as the multiplications take much too long with
+ * short delays.  This is a "reasonable" implementation, though (and the
+ * first constant multiplications gets optimized away if the delay is
+ * a constant)
+ */
+
+extern unsigned long loops_per_jiffy;
+
+static inline void udelay(unsigned long usecs)
+{
+        __delay(usecs * __delay_loops_MHz);
+}
+
+#define ndelay(n)       udelay((n) * 5)
+
+#endif /* _ASM_DELAY_H */