| /* delay.h: FRV delay code |
| * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| #include <asm/timer-regs.h> |
| * delay loop - runs at __core_clock_speed_HZ / 2 [there are 2 insns in the loop] |
| extern unsigned long __delay_loops_MHz; |
| static inline void __delay(unsigned long loops) |
| asm volatile("1: subicc %0,#1,%0,icc0 \n" |
| * 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 |
| extern unsigned long loops_per_jiffy; |
| static inline void udelay(unsigned long usecs) |
| __delay(usecs * __delay_loops_MHz); |
| #define ndelay(n) udelay((n) * 5) |
| #endif /* _ASM_DELAY_H */ |