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-rw-r--r--arch/parisc/include/asm/delay.h41
1 files changed, 10 insertions, 31 deletions
diff --git a/arch/parisc/include/asm/delay.h b/arch/parisc/include/asm/delay.h
index 912ee7e6a579..08e58e679e3e 100644
--- a/arch/parisc/include/asm/delay.h
+++ b/arch/parisc/include/asm/delay.h
@@ -1,15 +1,5 @@
-#ifndef _PARISC_DELAY_H
-#define _PARISC_DELAY_H
-
-#include <asm/special_insns.h> /* for mfctl() */
-#include <asm/processor.h> /* for boot_cpu_data */
-
-
-/*
- * Copyright (C) 1993 Linus Torvalds
- *
- * Delay routines
- */
+#ifndef _ASM_PARISC_DELAY_H
+#define _ASM_PARISC_DELAY_H
static __inline__ void __delay(unsigned long loops) {
asm volatile(
@@ -19,25 +9,14 @@ static __inline__ void __delay(unsigned long loops) {
: "=r" (loops) : "0" (loops));
}
-static __inline__ void __cr16_delay(unsigned long clocks) {
- unsigned long start;
-
- /*
- * Note: Due to unsigned math, cr16 rollovers shouldn't be
- * a problem here. However, on 32 bit, we need to make sure
- * we don't pass in too big a value. The current default
- * value of MAX_UDELAY_MS should help prevent this.
- */
+extern void __udelay(unsigned long usecs);
+extern void __udelay_bad(unsigned long usecs);
- start = mfctl(16);
- while ((mfctl(16) - start) < clocks)
- ;
+static inline void udelay(unsigned long usecs)
+{
+ if (__builtin_constant_p(usecs) && (usecs) > 20000)
+ __udelay_bad(usecs);
+ __udelay(usecs);
}
-static __inline__ void __udelay(unsigned long usecs) {
- __cr16_delay(usecs * ((unsigned long)boot_cpu_data.cpu_hz / 1000000UL));
-}
-
-#define udelay(n) __udelay(n)
-
-#endif /* defined(_PARISC_DELAY_H) */
+#endif /* _ASM_PARISC_DELAY_H */