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- /*
- * U-Boot - delay.h Routines for introducing delays
- *
- * Copyright (c) 2005-2007 Analog Devices Inc.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
- #ifndef _BLACKFIN_DELAY_H
- #define _BLACKFIN_DELAY_H
- /*
- * Changes made by akbar.hussain@Lineo.com, for BLACKFIN
- * Copyright (C) 1994 Hamish Macdonald
- *
- * Delay routines, using a pre-computed "loops_per_second" value.
- */
- static __inline__ void __delay(unsigned long loops)
- {
- __asm__ __volatile__("1:\t%0 += -1;\n\t"
- "cc = %0 == 0;\n\t"
- "if ! cc jump 1b;\n":"=d"(loops)
- :"0"(loops));
- }
- /*
- * Use only for very small delays ( < 1 msec). Should probably use a
- * lookup table, really, as the multiplications take much too long with
- * short delays. This is a "reasonable" implementation, though (and the
- * first constant multiplications gets optimized away if the delay is
- * a constant)
- */
- static __inline__ void __udelay(unsigned long usecs)
- {
- __delay(usecs);
- }
- #endif
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