1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/* $Id: delay.h,v 1.11 2001/01/02 08:15:32 davem Exp $
* delay.h: Linux delay routines on the V9.
*
* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu).
*/
#ifndef __SPARC64_DELAY_H
#define __SPARC64_DELAY_H
#include <linux/config.h>
#include <linux/param.h>
#ifdef CONFIG_SMP
#include <linux/sched.h>
#include <asm/smp.h>
#endif
extern __inline__ void __delay(unsigned long loops)
{
__asm__ __volatile__("
b,pt %%xcc, 1f
cmp %0, 0
.align 32
1:
bne,pt %%xcc, 1b
subcc %0, 1, %0
" : "=&r" (loops)
: "0" (loops)
: "cc");
}
extern __inline__ void __udelay(unsigned long usecs, unsigned long lps)
{
usecs *= 0x00000000000010c6UL; /* 2**32 / 1000000 */
__asm__ __volatile__("
mulx %1, %2, %0
srlx %0, 32, %0
" : "=r" (usecs)
: "r" (usecs), "r" (lps));
__delay(usecs * HZ);
}
#ifdef CONFIG_SMP
#define __udelay_val cpu_data[smp_processor_id()].udelay_val
#else
#define __udelay_val loops_per_jiffy
#endif
#define udelay(usecs) __udelay((usecs),__udelay_val)
#endif /* defined(__SPARC64_DELAY_H) */
|
