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 00000000000..3f26131120b
--- /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 */