| /* |
| * Precise Delay Loops for SuperH |
| * |
| * Copyright (C) 1999 Niibe Yutaka & Kaz Kojima |
| */ |
| |
| #include <linux/sched.h> |
| #include <linux/delay.h> |
| |
| void __delay(unsigned long loops) |
| { |
| __asm__ __volatile__( |
| "tst %0, %0\n\t" |
| "1:\t" |
| "bf/s 1b\n\t" |
| " dt %0" |
| : "=r" (loops) |
| : "0" (loops) |
| : "t"); |
| } |
| |
| inline void __const_udelay(unsigned long xloops) |
| { |
| __asm__("dmulu.l %0, %2\n\t" |
| "sts mach, %0" |
| : "=r" (xloops) |
| : "0" (xloops), "r" (cpu_data[raw_smp_processor_id()].loops_per_jiffy) |
| : "macl", "mach"); |
| __delay(xloops * HZ); |
| } |
| |
| void __udelay(unsigned long usecs) |
| { |
| __const_udelay(usecs * 0x000010c6); /* 2**32 / 1000000 */ |
| } |
| |
| void __ndelay(unsigned long nsecs) |
| { |
| __const_udelay(nsecs * 0x00000005); |
| } |
| |
