[S390] ETR support.

[firefly-linux-kernel-4.4.55.git] / include / asm-s390 / timex.h

diff --git a/include/asm-s390/timex.h b/include/asm-s390/timex.h
index 9ee5d801379666c9e7347a9915fc1d8ce2db81d3..5cbd55cb40ce7766f1da18cdf0e605a19be48314 100644 (file)
--- a/include/asm-s390/timex.h
+++ b/include/asm-s390/timex.h
@@ -11,6 +11,41 @@
 #ifndef _ASM_S390_TIMEX_H
 #define _ASM_S390_TIMEX_H
 
+/* Inline functions for clock register access. */
+static inline int set_clock(__u64 time)
+{
+       int cc;
+
+       asm volatile(
+               "   sck   0(%2)\n"
+               "   ipm   %0\n"
+               "   srl   %0,28\n"
+               : "=d" (cc) : "m" (time), "a" (&time) : "cc");
+       return cc;
+}
+
+static inline int store_clock(__u64 *time)
+{
+       int cc;
+
+       asm volatile(
+               "   stck  0(%2)\n"
+               "   ipm   %0\n"
+               "   srl   %0,28\n"
+               : "=d" (cc), "=m" (*time) : "a" (time) : "cc");
+       return cc;
+}
+
+static inline void set_clock_comparator(__u64 time)
+{
+       asm volatile("sckc 0(%1)" : : "m" (time), "a" (&time));
+}
+
+static inline void store_clock_comparator(__u64 *time)
+{
+       asm volatile("stckc 0(%1)" : "=m" (*time) : "a" (time));
+}
+
 #define CLOCK_TICK_RATE        1193180 /* Underlying HZ */
 
 typedef unsigned long long cycles_t;
@@ -32,6 +67,7 @@ static inline cycles_t get_cycles(void)
        return (cycles_t) get_clock() >> 2;
 }
 
+int get_sync_clock(unsigned long long *clock);
 void init_cpu_timer(void);
 
 #endif