X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-mips%2Fdelay.h;h=928f30f8c45cd6cfe405743d2faf388da033f1d1;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=d0f68447e5a713ba53fa185e2e44d5c9a009afdf;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/include/asm-mips/delay.h b/include/asm-mips/delay.h
index d0f68447e..928f30f8c 100644
--- a/include/asm-mips/delay.h
+++ b/include/asm-mips/delay.h
@@ -12,29 +12,29 @@
 
 #include <linux/config.h>
 #include <linux/param.h>
-
+#include <linux/smp.h>
 #include <asm/compiler.h>
 
-extern unsigned long loops_per_jiffy;
-
 static inline void __delay(unsigned long loops)
 {
 	if (sizeof(long) == 4)
 		__asm__ __volatile__ (
-		".set\tnoreorder\n"
-		"1:\tbnez\t%0,1b\n\t"
-		"subu\t%0,1\n\t"
-		".set\treorder"
+		"	.set	noreorder				\n"
+		"	.align	3					\n"
+		"1:	bnez	%0, 1b					\n"
+		"	subu	%0, 1					\n"
+		"	.set	reorder					\n"
 		: "=r" (loops)
 		: "0" (loops));
 	else if (sizeof(long) == 8)
 		__asm__ __volatile__ (
-		".set\tnoreorder\n"
-		"1:\tbnez\t%0,1b\n\t"
-		"dsubu\t%0,1\n\t"
-		".set\treorder"
-		:"=r" (loops)
-		:"0" (loops));
+		"	.set	noreorder				\n"
+		"	.align	3					\n"
+		"1:	bnez	%0, 1b					\n"
+		"	dsubu	%0, 1					\n"
+		"	.set	reorder					\n"
+		: "=r" (loops)
+		: "0" (loops));
 }
 
 
@@ -54,14 +54,12 @@ static inline void __udelay(unsigned long usecs, unsigned long lpj)
 	unsigned long lo;
 
 	/*
-	 * The common rates of 1000 and 128 are rounded wrongly by the
-	 * catchall case for 64-bit.  Excessive precission?  Probably ...
+	 * The rates of 128 is rounded wrongly by the catchall case
+	 * for 64-bit.  Excessive precission?  Probably ...
 	 */
-#if defined(CONFIG_MIPS64) && (HZ == 128)
+#if defined(CONFIG_64BIT) && (HZ == 128)
 	usecs *= 0x0008637bd05af6c7UL;		/* 2**64 / (1000000 / HZ) */
-#elif defined(CONFIG_MIPS64) && (HZ == 1000)
-	usecs *= 0x004189374BC6A7f0UL;		/* 2**64 / (1000000 / HZ) */
-#elif defined(CONFIG_MIPS64)
+#elif defined(CONFIG_64BIT)
 	usecs *= (0x8000000000000000UL / (500000 / HZ));
 #else /* 32-bit junk follows here */
 	usecs *= (unsigned long) (((0x8000000000000000ULL / (500000 / HZ)) +
@@ -82,12 +80,17 @@ static inline void __udelay(unsigned long usecs, unsigned long lpj)
 	__delay(usecs);
 }
 
-#ifdef CONFIG_SMP
 #define __udelay_val cpu_data[smp_processor_id()].udelay_val
-#else
-#define __udelay_val loops_per_jiffy
-#endif
 
 #define udelay(usecs) __udelay((usecs),__udelay_val)
 
+/* make sure "usecs *= ..." in udelay do not overflow. */
+#if HZ >= 1000
+#define MAX_UDELAY_MS	1
+#elif HZ <= 200
+#define MAX_UDELAY_MS	5
+#else
+#define MAX_UDELAY_MS	(1000 / HZ)
+#endif
+
 #endif /* _ASM_DELAY_H */