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9#ifndef _ASM_S390_TIMEX_H
10#define _ASM_S390_TIMEX_H
11
12#include <asm/lowcore.h>
13#include <linux/time64.h>
14
15
16#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
17
18
19static inline int set_tod_clock(__u64 time)
20{
21 int cc;
22
23 asm volatile(
24 " sck %1\n"
25 " ipm %0\n"
26 " srl %0,28\n"
27 : "=d" (cc) : "Q" (time) : "cc");
28 return cc;
29}
30
31static inline int store_tod_clock(__u64 *time)
32{
33 int cc;
34
35 asm volatile(
36 " stck %1\n"
37 " ipm %0\n"
38 " srl %0,28\n"
39 : "=d" (cc), "=Q" (*time) : : "cc");
40 return cc;
41}
42
43static inline void set_clock_comparator(__u64 time)
44{
45 asm volatile("sckc %0" : : "Q" (time));
46}
47
48static inline void store_clock_comparator(__u64 *time)
49{
50 asm volatile("stckc %0" : "=Q" (*time));
51}
52
53void clock_comparator_work(void);
54
55void __init time_early_init(void);
56
57extern unsigned char ptff_function_mask[16];
58
59
60#define PTFF_QAF 0x00
61#define PTFF_QTO 0x01
62#define PTFF_QSI 0x02
63#define PTFF_QUI 0x04
64#define PTFF_ATO 0x40
65#define PTFF_STO 0x41
66#define PTFF_SFS 0x42
67#define PTFF_SGS 0x43
68
69
70struct ptff_qto {
71 unsigned long long physical_clock;
72 unsigned long long tod_offset;
73 unsigned long long logical_tod_offset;
74 unsigned long long tod_epoch_difference;
75} __packed;
76
77static inline int ptff_query(unsigned int nr)
78{
79 unsigned char *ptr;
80
81 ptr = ptff_function_mask + (nr >> 3);
82 return (*ptr & (0x80 >> (nr & 7))) != 0;
83}
84
85
86struct ptff_qui {
87 unsigned int tm : 2;
88 unsigned int ts : 2;
89 unsigned int : 28;
90 unsigned int pad_0x04;
91 unsigned long leap_event;
92 short old_leap;
93 short new_leap;
94 unsigned int pad_0x14;
95 unsigned long prt[5];
96 unsigned long cst[3];
97 unsigned int skew;
98 unsigned int pad_0x5c[41];
99} __packed;
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108#define ptff(ptff_block, len, func) \
109({ \
110 struct addrtype { char _[len]; }; \
111 register unsigned int reg0 asm("0") = func; \
112 register unsigned long reg1 asm("1") = (unsigned long) (ptff_block);\
113 int rc; \
114 \
115 asm volatile( \
116 " .word 0x0104\n" \
117 " ipm %0\n" \
118 " srl %0,28\n" \
119 : "=d" (rc), "+m" (*(struct addrtype *) reg1) \
120 : "d" (reg0), "d" (reg1) : "cc"); \
121 rc; \
122})
123
124static inline unsigned long long local_tick_disable(void)
125{
126 unsigned long long old;
127
128 old = S390_lowcore.clock_comparator;
129 S390_lowcore.clock_comparator = -1ULL;
130 set_clock_comparator(S390_lowcore.clock_comparator);
131 return old;
132}
133
134static inline void local_tick_enable(unsigned long long comp)
135{
136 S390_lowcore.clock_comparator = comp;
137 set_clock_comparator(S390_lowcore.clock_comparator);
138}
139
140#define CLOCK_TICK_RATE 1193180
141#define STORE_CLOCK_EXT_SIZE 16
142
143typedef unsigned long long cycles_t;
144
145static inline void get_tod_clock_ext(char *clk)
146{
147 typedef struct { char _[STORE_CLOCK_EXT_SIZE]; } addrtype;
148
149 asm volatile("stcke %0" : "=Q" (*(addrtype *) clk) : : "cc");
150}
151
152static inline unsigned long long get_tod_clock(void)
153{
154 unsigned char clk[STORE_CLOCK_EXT_SIZE];
155
156 get_tod_clock_ext(clk);
157 return *((unsigned long long *)&clk[1]);
158}
159
160static inline unsigned long long get_tod_clock_fast(void)
161{
162#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES
163 unsigned long long clk;
164
165 asm volatile("stckf %0" : "=Q" (clk) : : "cc");
166 return clk;
167#else
168 return get_tod_clock();
169#endif
170}
171
172static inline cycles_t get_cycles(void)
173{
174 return (cycles_t) get_tod_clock() >> 2;
175}
176
177int get_phys_clock(unsigned long long *clock);
178void init_cpu_timer(void);
179unsigned long long monotonic_clock(void);
180
181void tod_to_timeval(__u64 todval, struct timespec64 *xt);
182
183static inline
184void stck_to_timespec64(unsigned long long stck, struct timespec64 *ts)
185{
186 tod_to_timeval(stck - TOD_UNIX_EPOCH, ts);
187}
188
189extern u64 sched_clock_base_cc;
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200static inline unsigned long long get_tod_clock_monotonic(void)
201{
202 return get_tod_clock() - sched_clock_base_cc;
203}
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224static inline unsigned long long tod_to_ns(unsigned long long todval)
225{
226 unsigned long long ns;
227
228 ns = ((todval >> 32) << 23) * 125;
229 ns += ((todval & 0xffffffff) * 125) >> 9;
230 return ns;
231}
232
233#endif
234