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9#ifndef _ASM_S390_TIMEX_H
10#define _ASM_S390_TIMEX_H
11
12#include <asm/lowcore.h>
13
14
15#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
16
17
18static inline int set_tod_clock(__u64 time)
19{
20 int cc;
21
22 asm volatile(
23 " sck %1\n"
24 " ipm %0\n"
25 " srl %0,28\n"
26 : "=d" (cc) : "Q" (time) : "cc");
27 return cc;
28}
29
30static inline int store_tod_clock(__u64 *time)
31{
32 int cc;
33
34 asm volatile(
35 " stck %1\n"
36 " ipm %0\n"
37 " srl %0,28\n"
38 : "=d" (cc), "=Q" (*time) : : "cc");
39 return cc;
40}
41
42static inline void set_clock_comparator(__u64 time)
43{
44 asm volatile("sckc %0" : : "Q" (time));
45}
46
47static inline void store_clock_comparator(__u64 *time)
48{
49 asm volatile("stckc %0" : "=Q" (*time));
50}
51
52void clock_comparator_work(void);
53
54static inline unsigned long long local_tick_disable(void)
55{
56 unsigned long long old;
57
58 old = S390_lowcore.clock_comparator;
59 S390_lowcore.clock_comparator = -1ULL;
60 set_clock_comparator(S390_lowcore.clock_comparator);
61 return old;
62}
63
64static inline void local_tick_enable(unsigned long long comp)
65{
66 S390_lowcore.clock_comparator = comp;
67 set_clock_comparator(S390_lowcore.clock_comparator);
68}
69
70#define CLOCK_TICK_RATE 1193180
71#define STORE_CLOCK_EXT_SIZE 16
72
73typedef unsigned long long cycles_t;
74
75static inline void get_tod_clock_ext(char *clk)
76{
77 typedef struct { char _[STORE_CLOCK_EXT_SIZE]; } addrtype;
78
79 asm volatile("stcke %0" : "=Q" (*(addrtype *) clk) : : "cc");
80}
81
82static inline unsigned long long get_tod_clock(void)
83{
84 unsigned char clk[STORE_CLOCK_EXT_SIZE];
85
86 get_tod_clock_ext(clk);
87 return *((unsigned long long *)&clk[1]);
88}
89
90static inline unsigned long long get_tod_clock_fast(void)
91{
92#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
93 unsigned long long clk;
94
95 asm volatile("stckf %0" : "=Q" (clk) : : "cc");
96 return clk;
97#else
98 return get_tod_clock();
99#endif
100}
101
102static inline cycles_t get_cycles(void)
103{
104 return (cycles_t) get_tod_clock() >> 2;
105}
106
107int get_sync_clock(unsigned long long *clock);
108void init_cpu_timer(void);
109unsigned long long monotonic_clock(void);
110
111void tod_to_timeval(__u64, struct timespec *);
112
113static inline
114void stck_to_timespec(unsigned long long stck, struct timespec *ts)
115{
116 tod_to_timeval(stck - TOD_UNIX_EPOCH, ts);
117}
118
119extern u64 sched_clock_base_cc;
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130static inline unsigned long long get_tod_clock_monotonic(void)
131{
132 return get_tod_clock() - sched_clock_base_cc;
133}
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154static inline unsigned long long tod_to_ns(unsigned long long todval)
155{
156 unsigned long long ns;
157
158 ns = ((todval >> 32) << 23) * 125;
159 ns += ((todval & 0xffffffff) * 125) >> 9;
160 return ns;
161}
162
163#endif
164