xref: /openbmc/qemu/pc-bios/s390-ccw/s390-time.h (revision 21d0bafbfe415e5c0f8109a98848c46f7d871c73) 
1*e70bc57bSJanosch Frank #ifndef TIME_H
2*e70bc57bSJanosch Frank #define TIME_H
3*e70bc57bSJanosch Frank 
get_clock(void)4*e70bc57bSJanosch Frank static inline u64 get_clock(void)
5*e70bc57bSJanosch Frank {
6*e70bc57bSJanosch Frank     u64 r;
7*e70bc57bSJanosch Frank 
8*e70bc57bSJanosch Frank     asm volatile("stck %0" : "=Q" (r) : : "cc");
9*e70bc57bSJanosch Frank     return r;
10*e70bc57bSJanosch Frank }
11*e70bc57bSJanosch Frank 
get_time_ms(void)12*e70bc57bSJanosch Frank static inline u64 get_time_ms(void)
13*e70bc57bSJanosch Frank {
14*e70bc57bSJanosch Frank     /* Bit 51 is incremented each microsecond */
15*e70bc57bSJanosch Frank     return (get_clock() >> 12) / 1000;
16*e70bc57bSJanosch Frank }
17*e70bc57bSJanosch Frank 
get_time_seconds(void)18*e70bc57bSJanosch Frank static inline u64 get_time_seconds(void)
19*e70bc57bSJanosch Frank {
20*e70bc57bSJanosch Frank     return get_time_ms() / 1000;
21*e70bc57bSJanosch Frank }
22*e70bc57bSJanosch Frank 
23*e70bc57bSJanosch Frank #endif
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