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-rw-r--r--include/asm-arm26/delay.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/include/asm-arm26/delay.h b/include/asm-arm26/delay.h
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+++ b/include/asm-arm26/delay.h
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+#ifndef __ASM_ARM_DELAY_H
+#define __ASM_ARM_DELAY_H
+
+/*
+ * Copyright (C) 1995 Russell King
+ *
+ * Delay routines, using a pre-computed "loops_per_second" value.
+ */
+
+extern void __delay(int loops);
+
+/*
+ * division by multiplication: you don't have to worry about
+ * loss of precision.
+ *
+ * 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)
+ *
+ * FIXME - lets improve it then...
+ */
+extern void udelay(unsigned long usecs);
+
+static inline unsigned long muldiv(unsigned long a, unsigned long b, unsigned long c)
+{
+ return a * b / c;
+}
+
+
+
+#endif /* defined(_ARM_DELAY_H) */
+
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