1 files changed, 106 insertions, 0 deletions

diff --git a/arch/s390/include/asm/irqflags.h b/arch/s390/include/asm/irqflags.h
new file mode 100644
index 000000000000..3f26131120b7
--- /dev/null
+++ b/arch/s390/include/asm/irqflags.h
@@ -0,0 +1,106 @@
+/*
+ *  include/asm-s390/irqflags.h
+ *
+ *    Copyright (C) IBM Corp. 2006
+ *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ */
+
+#ifndef __ASM_IRQFLAGS_H
+#define __ASM_IRQFLAGS_H
+
+#ifdef __KERNEL__
+
+#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
+
+/* store then or system mask. */
+#define __raw_local_irq_stosm(__or)                                     \
+({                                                                      \
+        unsigned long __mask;                                           \
+        asm volatile(                                                   \
+                "       stosm   %0,%1"                                  \
+                : "=Q" (__mask) : "i" (__or) : "memory");               \
+        __mask;                                                         \
+})
+
+/* store then and system mask. */
+#define __raw_local_irq_stnsm(__and)                                    \
+({                                                                      \
+        unsigned long __mask;                                           \
+        asm volatile(                                                   \
+                "       stnsm   %0,%1"                                  \
+                : "=Q" (__mask) : "i" (__and) : "memory");              \
+        __mask;                                                         \
+})
+
+/* set system mask. */
+#define __raw_local_irq_ssm(__mask)                                     \
+({                                                                      \
+        asm volatile("ssm   %0" : : "Q" (__mask) : "memory");           \
+})
+
+#else /* __GNUC__ */
+
+/* store then or system mask. */
+#define __raw_local_irq_stosm(__or)                                     \
+({                                                                      \
+        unsigned long __mask;                                           \
+        asm volatile(                                                   \
+                "       stosm   0(%1),%2"                               \
+                : "=m" (__mask)                                         \
+                : "a" (&__mask), "i" (__or) : "memory");                \
+        __mask;                                                         \
+})
+
+/* store then and system mask. */
+#define __raw_local_irq_stnsm(__and)                                    \
+({                                                                      \
+        unsigned long __mask;                                           \
+        asm volatile(                                                   \
+                "       stnsm   0(%1),%2"                               \
+                : "=m" (__mask)                                         \
+                : "a" (&__mask), "i" (__and) : "memory");               \
+        __mask;                                                         \
+})
+
+/* set system mask. */
+#define __raw_local_irq_ssm(__mask)                                     \
+({                                                                      \
+        asm volatile(                                                   \
+                "       ssm     0(%0)"                                  \
+                : : "a" (&__mask), "m" (__mask) : "memory");            \
+})
+
+#endif /* __GNUC__ */
+
+/* interrupt control.. */
+static inline unsigned long raw_local_irq_enable(void)
+{
+        return __raw_local_irq_stosm(0x03);
+}
+
+static inline unsigned long raw_local_irq_disable(void)
+{
+        return __raw_local_irq_stnsm(0xfc);
+}
+
+#define raw_local_save_flags(x)                                         \
+do {                                                                    \
+        typecheck(unsigned long, x);                                    \
+        (x) = __raw_local_irq_stosm(0x00);                              \
+} while (0)
+
+static inline void raw_local_irq_restore(unsigned long flags)
+{
+        __raw_local_irq_ssm(flags);
+}
+
+static inline int raw_irqs_disabled_flags(unsigned long flags)
+{
+        return !(flags & (3UL << (BITS_PER_LONG - 8)));
+}
+
+/* For spinlocks etc */
+#define raw_local_irq_save(x)   ((x) = raw_local_irq_disable())
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_IRQFLAGS_H */