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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/s390/include/asm/irqflags.h
Initial import
Diffstat (limited to 'arch/s390/include/asm/irqflags.h')
-rw-r--r--arch/s390/include/asm/irqflags.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/s390/include/asm/irqflags.h b/arch/s390/include/asm/irqflags.h
new file mode 100644
index 000000000..16aa0c779
--- /dev/null
+++ b/arch/s390/include/asm/irqflags.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright IBM Corp. 2006, 2010
+ * Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
+ */
+
+#ifndef __ASM_IRQFLAGS_H
+#define __ASM_IRQFLAGS_H
+
+#include <linux/types.h>
+
+/* store then OR system mask. */
+#define __arch_local_irq_stosm(__or) \
+({ \
+ unsigned long __mask; \
+ asm volatile( \
+ " stosm %0,%1" \
+ : "=Q" (__mask) : "i" (__or) : "memory"); \
+ __mask; \
+})
+
+/* store then AND system mask. */
+#define __arch_local_irq_stnsm(__and) \
+({ \
+ unsigned long __mask; \
+ asm volatile( \
+ " stnsm %0,%1" \
+ : "=Q" (__mask) : "i" (__and) : "memory"); \
+ __mask; \
+})
+
+/* set system mask. */
+static inline notrace void __arch_local_irq_ssm(unsigned long flags)
+{
+ asm volatile("ssm %0" : : "Q" (flags) : "memory");
+}
+
+static inline notrace unsigned long arch_local_save_flags(void)
+{
+ return __arch_local_irq_stnsm(0xff);
+}
+
+static inline notrace unsigned long arch_local_irq_save(void)
+{
+ return __arch_local_irq_stnsm(0xfc);
+}
+
+static inline notrace void arch_local_irq_disable(void)
+{
+ arch_local_irq_save();
+}
+
+static inline notrace void arch_local_irq_enable(void)
+{
+ __arch_local_irq_stosm(0x03);
+}
+
+static inline notrace void arch_local_irq_restore(unsigned long flags)
+{
+ __arch_local_irq_ssm(flags);
+}
+
+static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & (3UL << (BITS_PER_LONG - 8)));
+}
+
+static inline notrace bool arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#endif /* __ASM_IRQFLAGS_H */