| #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); |
| } |
| |
| /* ETRAX 100 is really too slow to sleep for nanosecs. */ |
| /* Divide with 1024 to avoid a real division that would take >1 us... */ |
| extern __inline__ void ndelay(unsigned long nsecs) |
| { |
| __delay(1 + nsecs * loops_per_usec / 1024); |
| } |
| |
| #endif /* defined(_CRIS_DELAY_H) */ |
| |
| |
| |
