xref: /OK3568_Linux_fs/kernel/arch/s390/include/asm/cputime.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  *  Copyright IBM Corp. 2004
4*4882a593Smuzhiyun  *
5*4882a593Smuzhiyun  *  Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
6*4882a593Smuzhiyun  */
7*4882a593Smuzhiyun 
8*4882a593Smuzhiyun #ifndef _S390_CPUTIME_H
9*4882a593Smuzhiyun #define _S390_CPUTIME_H
10*4882a593Smuzhiyun 
11*4882a593Smuzhiyun #include <linux/types.h>
12*4882a593Smuzhiyun #include <asm/timex.h>
13*4882a593Smuzhiyun 
14*4882a593Smuzhiyun #define CPUTIME_PER_USEC 4096ULL
15*4882a593Smuzhiyun #define CPUTIME_PER_SEC (CPUTIME_PER_USEC * USEC_PER_SEC)
16*4882a593Smuzhiyun 
17*4882a593Smuzhiyun /* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun #define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
20*4882a593Smuzhiyun 
21*4882a593Smuzhiyun /*
22*4882a593Smuzhiyun  * Convert cputime to microseconds.
23*4882a593Smuzhiyun  */
cputime_to_usecs(const u64 cputime)24*4882a593Smuzhiyun static inline u64 cputime_to_usecs(const u64 cputime)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun 	return cputime >> 12;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun 
29*4882a593Smuzhiyun /*
30*4882a593Smuzhiyun  * Convert cputime to nanoseconds.
31*4882a593Smuzhiyun  */
32*4882a593Smuzhiyun #define cputime_to_nsecs(cputime) tod_to_ns(cputime)
33*4882a593Smuzhiyun 
34*4882a593Smuzhiyun u64 arch_cpu_idle_time(int cpu);
35*4882a593Smuzhiyun 
36*4882a593Smuzhiyun #define arch_idle_time(cpu) arch_cpu_idle_time(cpu)
37*4882a593Smuzhiyun 
38*4882a593Smuzhiyun #endif /* _S390_CPUTIME_H */
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