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author | Greg Ungerer <gerg@uclinux.org> | 2008-07-31 08:38:07 +0400 |
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committer | Greg Ungerer <gerg@uclinux.org> | 2008-08-07 09:36:16 +0400 |
commit | 58750139001bae11a1f9b074f3a9c774fecf5ba8 (patch) | |
tree | ecdafd4d8c3d2ef2cee7e512b7310552863a617c /include/asm-m68knommu/delay.h | |
parent | 685d87f7ccc649ab92b55e18e507a65d0e694eb9 (diff) | |
download | linux-58750139001bae11a1f9b074f3a9c774fecf5ba8.tar.xz |
Move all of include/asm-m68knommu to arch/m68knommu/include/asm.
With the current kbuild infrastructure in place no other changes
are required for this to work.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'include/asm-m68knommu/delay.h')
-rw-r--r-- | include/asm-m68knommu/delay.h | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/include/asm-m68knommu/delay.h b/include/asm-m68knommu/delay.h deleted file mode 100644 index 55cbd6294ab6..000000000000 --- a/include/asm-m68knommu/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) */ |