patch-2.1.80 linux/arch/arm/lib/delay.S

• Lines: 44
• Date: Tue Jan 20 16:39:41 1998
• Orig file: v2.1.79/linux/arch/arm/lib/delay.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.79/linux/arch/arm/lib/delay.S linux/arch/arm/lib/delay.S
@@ -0,0 +1,43 @@
+/*
+ * linux/arch/arm/lib/delay.S
+ *
+ * Copyright (C) 1995, 1996 Russell King
+ */
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+		.text
+
+LC0:		.word	SYMBOL_NAME(loops_per_sec)
+
+ENTRY(udelay)
+		mov	r2, #0x1000
+		orr	r2, r2, #0x00c6
+		mul	r1, r0, r2
+		ldr	r2, LC0
+		ldr	r2, [r2]
+		mov	r1, r1, lsr #11
+		mov	r2, r2, lsr #11
+		mul	r0, r1, r2
+		movs	r0, r0, lsr #10
+		RETINSTR(moveq,pc,lr)
+
+@ Delay routine
+ENTRY(__delay)
+		subs	r0, r0, #1
+		RETINSTR(movcc,pc,lr)
+		subs	r0, r0, #1
+		RETINSTR(movcc,pc,lr)
+		subs	r0, r0, #1
+		RETINSTR(movcc,pc,lr)
+		subs	r0, r0, #1
+		RETINSTR(movcc,pc,lr)
+		subs	r0, r0, #1
+		RETINSTR(movcc,pc,lr)
+		subs	r0, r0, #1
+		RETINSTR(movcc,pc,lr)
+		subs	r0, r0, #1
+		RETINSTR(movcc,pc,lr)
+		subs	r0, r0, #1
+		bcs	SYMBOL_NAME(__delay)
+		RETINSTR(mov,pc,lr)
+