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#ifndef _CRIS_DELAY_H #define _CRIS_DELAY_H /* * Copyright (C) 1998, 1999, 2000, 2001 Axis Communications AB * * Delay routines, using a pre-computed "loops_per_second" value. */ #include <linux/config.h> #include <linux/linkage.h> #ifdef CONFIG_SMP #include <asm/smp.h> #endif extern void __do_delay(void); /* Special register call calling convention */ extern __inline__ void __delay(int loops) { __asm__ __volatile__ ( "move.d %0,$r9\n\t" "beq 2f\n\t" "subq 1,$r9\n\t" "1:\n\t" "bne 1b\n\t" "subq 1,$r9\n" "2:" : : "g" (loops) : "r9"); } /* Use only for very small delays ( < 1 msec). */ extern unsigned long loops_per_usec; /* arch/cris/mm/init.c */ extern __inline__ void udelay(unsigned long usecs) { __delay(usecs * loops_per_usec); } #endif /* defined(_CRIS_DELAY_H) */ |