summaryrefslogtreecommitdiff
path: root/include/asm-arm26/delay.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-arm26/delay.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-arm26/delay.h')
-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
new file mode 100644
index 000000000000..40fbf7bbe6c2
--- /dev/null
+++ b/include/asm-arm26/delay.h
@@ -0,0 +1,34 @@
+#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) */
+