This source file includes following definitions.
- read_current_timer
- __delay
- __const_udelay
- __udelay
- __ndelay
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15 #include <linux/kernel.h>
16 #include <linux/export.h>
17 #include <linux/init.h>
18 #include <asm/param.h>
19 #include <asm/delay.h>
20 #include <asm/timex.h>
21 #include <asm/processor.h>
22
23 int read_current_timer(unsigned long *timer_value)
24 {
25 *timer_value = get_cycles();
26 return 0;
27 }
28
29 void __delay(unsigned long cycles)
30 {
31 cycles_t start = get_cycles();
32
33 while ((get_cycles() - start) < cycles)
34 cpu_relax();
35 }
36 EXPORT_SYMBOL(__delay);
37
38 inline void __const_udelay(unsigned long xloops)
39 {
40 unsigned long long loops;
41
42 loops = (unsigned long long)xloops * loops_per_jiffy * HZ;
43
44 __delay(loops >> 32);
45 }
46 EXPORT_SYMBOL(__const_udelay);
47
48 void __udelay(unsigned long usecs)
49 {
50 __const_udelay(usecs * 0x10C7UL);
51 }
52 EXPORT_SYMBOL(__udelay);
53
54 void __ndelay(unsigned long nsecs)
55 {
56 __const_udelay(nsecs * 0x5UL);
57 }
58 EXPORT_SYMBOL(__ndelay);