From 94395a0ecea8e3dcc2f09b3fd35c3c8cfad51eae Mon Sep 17 00:00:00 2001
From: Marcus Brinkmann <marcus@gnu.org>
Date: Thu, 27 Jul 2000 16:48:04 +0000
Subject: 2000-07-27  Marcus Brinkmann  <marcus@gnu.org>

	* Fix omissions in last change:
	* linux/src/arch/i386/lib/delay.S: Now really remove the file.
	* linux/src/arch/i386/lib/delay.c: Now really add the file.
---
 linux/src/arch/i386/lib/delay.c | 45 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 linux/src/arch/i386/lib/delay.c

(limited to 'linux/src/arch/i386/lib/delay.c')

diff --git a/linux/src/arch/i386/lib/delay.c b/linux/src/arch/i386/lib/delay.c
new file mode 100644
index 0000000..b1551b2
--- /dev/null
+++ b/linux/src/arch/i386/lib/delay.c
@@ -0,0 +1,45 @@
+/*
+ *	Precise Delay Loops for i386
+ *
+ *	Copyright (C) 1993 Linus Torvalds
+ *	Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
+ *
+ *	The __delay function must _NOT_ be inlined as its execution time
+ *	depends wildly on alignment on many x86 processors. The additional
+ *	jump magic is needed to get the timing stable on all the CPU's
+ *	we have to worry about.
+ */
+
+#include <linux/sched.h>
+#include <linux/delay.h>
+
+#ifdef __SMP__
+#include <asm/smp.h>
+#endif
+
+void __delay(unsigned long loops)
+{
+	int d0;
+	__asm__ __volatile__(
+		"\tjmp 1f\n"
+		".align 16\n"
+		"1:\tjmp 2f\n"
+		".align 16\n"
+		"2:\tdecl %0\n\tjns 2b"
+		:"=&amp;a" (d0)
+		:"0" (loops));
+}
+
+inline void __const_udelay(unsigned long xloops)
+{
+	int d0;
+	__asm__("mull %0"
+		:"=d" (xloops), "=&amp;a" (d0)
+		:"1" (xloops),"0" (loops_per_sec));
+        __delay(xloops);
+}
+
+void __udelay(unsigned long usecs)
+{
+	__const_udelay(usecs * 0x000010c6);  /* 2**32 / 1000000 */
+}
-- 
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