1 files changed, 88 insertions, 0 deletions

diff --git a/arch/s390/include/asm/timex.h b/arch/s390/include/asm/timex.h
new file mode 100644
index 000000000000..d744c3d62de5
--- /dev/null
+++ b/arch/s390/include/asm/timex.h
@@ -0,0 +1,88 @@
+/*
+ *  include/asm-s390/timex.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *
+ *  Derived from "include/asm-i386/timex.h"
+ *    Copyright (C) 1992, Linus Torvalds
+ */
+
+#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;
+
+static inline unsigned long long get_clock (void)
+{
+        unsigned long long clk;
+
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
+        asm volatile("stck %0" : "=Q" (clk) : : "cc");
+#else /* __GNUC__ */
+        asm volatile("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc");
+#endif /* __GNUC__ */
+        return clk;
+}
+
+static inline unsigned long long get_clock_xt(void)
+{
+        unsigned char clk[16];
+
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
+        asm volatile("stcke %0" : "=Q" (clk) : : "cc");
+#else /* __GNUC__ */
+        asm volatile("stcke 0(%1)" : "=m" (clk)
+                                   : "a" (clk) : "cc");
+#endif /* __GNUC__ */
+
+        return *((unsigned long long *)&clk[1]);
+}
+
+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);
+unsigned long long monotonic_clock(void);
+
+#endif