patch-2.1.16 linux/include/asm-sparc64/delay.h

• Lines: 43
• Date: Fri Dec 13 11:37:41 1996
• Orig file: v2.1.15/linux/include/asm-sparc64/delay.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.15/linux/include/asm-sparc64/delay.h linux/include/asm-sparc64/delay.h
@@ -0,0 +1,42 @@
+/* $Id: delay.h,v 1.3 1996/12/12 15:53:48 davem Exp $
+ * delay.h: Linux delay routines on the V9.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu).
+ */
+
+#ifndef __SPARC64_DELAY_H
+#define __SPARC64_DELAY_H
+
+extern unsigned long loops_per_sec;
+
+extern __inline__ void __delay(unsigned long loops)
+{
+	__asm__ __volatile__("
+	cmp	%0, 0
+1:
+	bne,pt	%%xcc, 1b
+	 subcc	%0, 1, %0
+"	: "=&r" (loops)
+	: "0" (loops));
+}
+
+extern __inline__ void udelay(unsigned long usecs)
+{
+	usecs *= 0x00000000000010c6UL;		/* 2**32 / 1000000 */
+
+	__asm__ __volatile__("
+	mulx	%1, %2, %0
+	srlx	%0, 32, %0
+"	: "=r" (usecs)
+	: "r" (usecs), "r" (loops_per_sec));
+
+	__delay(usecs);
+}
+
+extern __inline__ unsigned long muldiv(unsigned long a, unsigned long b, unsigned long c)
+{
+	return (a*b)/c;
+}
+
+#endif /* defined(__SPARC64_DELAY_H) */
+