add s390x port

1 files changed, 30 insertions, 0 deletions

diff --git a/arch/s390x/atomic_arch.h b/arch/s390x/atomic_arch.h
new file mode 100644
index 00000000..9b0e1df9
--- /dev/null
+++ b/arch/s390x/atomic_arch.h
@@ -0,0 +1,30 @@
+#define a_cas a_cas
+static inline int a_cas(volatile int *p, int t, int s)
+{
+	__asm__ __volatile__ (
+		"cs %0, %2, %1"
+		: "+d"(t), "+Q"(*p) : "d"(s) : "memory", "cc");
+	return t;
+}
+
+#define a_cas_p a_cas_p
+static inline void *a_cas_p(volatile void *p, void *t, void *s)
+{
+	__asm__ __volatile__ (
+		"csg %0, %2, %1"
+		: "+d"(t), "+Q"(*(void *volatile *)p) : "d"(s)
+		: "memory", "cc");
+	return t;
+}
+
+#define a_barrier a_barrier
+static inline void a_barrier()
+{
+	__asm__ __volatile__ ("bcr 15,0" : : : "memory");
+}
+
+#define a_crash a_crash
+static inline void a_crash()
+{
+	__asm__ __volatile__ (".insn e,0");
+}