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Diffstat (limited to 'arch/m68knommu/include/asm/delay.h')
-rw-r--r--arch/m68knommu/include/asm/delay.h76
1 files changed, 0 insertions, 76 deletions
diff --git a/arch/m68knommu/include/asm/delay.h b/arch/m68knommu/include/asm/delay.h
deleted file mode 100644
index 55cbd6294ab..00000000000
--- a/arch/m68knommu/include/asm/delay.h
+++ /dev/null
@@ -1,76 +0,0 @@
-#ifndef _M68KNOMMU_DELAY_H
-#define _M68KNOMMU_DELAY_H
-
-/*
- * Copyright (C) 1994 Hamish Macdonald
- * Copyright (C) 2004 Greg Ungerer <gerg@snapgear.com>
- */
-
-#include <asm/param.h>
-
-static inline void __delay(unsigned long loops)
-{
-#if defined(CONFIG_COLDFIRE)
- /* The coldfire runs this loop at significantly different speeds
- * depending upon long word alignment or not. We'll pad it to
- * long word alignment which is the faster version.
- * The 0x4a8e is of course a 'tstl %fp' instruction. This is better
- * than using a NOP (0x4e71) instruction because it executes in one
- * cycle not three and doesn't allow for an arbitary delay waiting
- * for bus cycles to finish. Also fp/a6 isn't likely to cause a
- * stall waiting for the register to become valid if such is added
- * to the coldfire at some stage.
- */
- __asm__ __volatile__ ( ".balignw 4, 0x4a8e\n\t"
- "1: subql #1, %0\n\t"
- "jcc 1b"
- : "=d" (loops) : "0" (loops));
-#else
- __asm__ __volatile__ ( "1: subql #1, %0\n\t"
- "jcc 1b"
- : "=d" (loops) : "0" (loops));
-#endif
-}
-
-/*
- * Ideally we use a 32*32->64 multiply to calculate the number of
- * loop iterations, but the older standard 68k and ColdFire do not
- * have this instruction. So for them we have a clsoe approximation
- * loop using 32*32->32 multiplies only. This calculation based on
- * the ARM version of delay.
- *
- * We want to implement:
- *
- * loops = (usecs * 0x10c6 * HZ * loops_per_jiffy) / 2^32
- */
-
-#define HZSCALE (268435456 / (1000000/HZ))
-
-extern unsigned long loops_per_jiffy;
-
-static inline void _udelay(unsigned long usecs)
-{
-#if defined(CONFIG_M68328) || defined(CONFIG_M68EZ328) || \
- defined(CONFIG_M68VZ328) || defined(CONFIG_M68360) || \
- defined(CONFIG_COLDFIRE)
- __delay((((usecs * HZSCALE) >> 11) * (loops_per_jiffy >> 11)) >> 6);
-#else
- unsigned long tmp;
-
- usecs *= 4295; /* 2**32 / 1000000 */
- __asm__ ("mulul %2,%0:%1"
- : "=d" (usecs), "=d" (tmp)
- : "d" (usecs), "1" (loops_per_jiffy*HZ));
- __delay(usecs);
-#endif
-}
-
-/*
- * Moved the udelay() function into library code, no longer inlined.
- * I had to change the algorithm because we are overflowing now on
- * the faster ColdFire parts. The code is a little bigger, so it makes
- * sense to library it.
- */
-extern void udelay(unsigned long usecs);
-
-#endif /* defined(_M68KNOMMU_DELAY_H) */