ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/arch/s390/include/asm/cmpxchg.h b/marvell/linux/arch/s390/include/asm/cmpxchg.h
new file mode 100644
index 0000000..af99c1f
--- /dev/null
+++ b/marvell/linux/arch/s390/include/asm/cmpxchg.h
@@ -0,0 +1,66 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright IBM Corp. 1999, 2011
+ *
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
+ */
+
+#ifndef __ASM_CMPXCHG_H
+#define __ASM_CMPXCHG_H
+
+#include <linux/mmdebug.h>
+#include <linux/types.h>
+#include <linux/bug.h>
+
+#define cmpxchg(ptr, o, n) \
+({ \
+ __typeof__(*(ptr)) __o = (o); \
+ __typeof__(*(ptr)) __n = (n); \
+ (__typeof__(*(ptr))) __sync_val_compare_and_swap((ptr),__o,__n);\
+})
+
+#define cmpxchg64 cmpxchg
+#define cmpxchg_local cmpxchg
+#define cmpxchg64_local cmpxchg
+
+#define xchg(ptr, x) \
+({ \
+ __typeof__(ptr) __ptr = (ptr); \
+ __typeof__(*(ptr)) __old; \
+ do { \
+ __old = *__ptr; \
+ } while (!__sync_bool_compare_and_swap(__ptr, __old, x)); \
+ __old; \
+})
+
+#define __cmpxchg_double(p1, p2, o1, o2, n1, n2) \
+({ \
+ register __typeof__(*(p1)) __old1 asm("2") = (o1); \
+ register __typeof__(*(p2)) __old2 asm("3") = (o2); \
+ register __typeof__(*(p1)) __new1 asm("4") = (n1); \
+ register __typeof__(*(p2)) __new2 asm("5") = (n2); \
+ int cc; \
+ asm volatile( \
+ " cdsg %[old],%[new],%[ptr]\n" \
+ " ipm %[cc]\n" \
+ " srl %[cc],28" \
+ : [cc] "=d" (cc), [old] "+d" (__old1), "+d" (__old2) \
+ : [new] "d" (__new1), "d" (__new2), \
+ [ptr] "Q" (*(p1)), "Q" (*(p2)) \
+ : "memory", "cc"); \
+ !cc; \
+})
+
+#define cmpxchg_double(p1, p2, o1, o2, n1, n2) \
+({ \
+ __typeof__(p1) __p1 = (p1); \
+ __typeof__(p2) __p2 = (p2); \
+ BUILD_BUG_ON(sizeof(*(p1)) != sizeof(long)); \
+ BUILD_BUG_ON(sizeof(*(p2)) != sizeof(long)); \
+ VM_BUG_ON((unsigned long)((__p1) + 1) != (unsigned long)(__p2));\
+ __cmpxchg_double(__p1, __p2, o1, o2, n1, n2); \
+})
+
+#define system_has_cmpxchg_double() 1
+
+#endif /* __ASM_CMPXCHG_H */