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7
8#include <linux/sched.h>
9#include <linux/delay.h>
10
11void __delay(unsigned long loops)
12{
13 __asm__ __volatile__(
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20
21
22 ".balign 8\n\t"
23
24 "tst %0, %0\n\t"
25 "1:\t"
26 "bf/s 1b\n\t"
27 " dt %0"
28 : "=r" (loops)
29 : "0" (loops)
30 : "t");
31}
32
33inline void __const_udelay(unsigned long xloops)
34{
35 xloops *= 4;
36 __asm__("dmulu.l %0, %2\n\t"
37 "sts mach, %0"
38 : "=r" (xloops)
39 : "0" (xloops),
40 "r" (cpu_data[raw_smp_processor_id()].loops_per_jiffy * (HZ/4))
41 : "macl", "mach");
42 __delay(++xloops);
43}
44
45void __udelay(unsigned long usecs)
46{
47 __const_udelay(usecs * 0x000010c6);
48}
49
50void __ndelay(unsigned long nsecs)
51{
52 __const_udelay(nsecs * 0x00000005);
53}
54
55