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authorArnd Bergmann <arnd@arndb.de>2009-05-13 22:56:33 +0000
committerArnd Bergmann <arnd@klappe2.(none)>2009-06-11 21:02:37 +0200
commitaafe4dbed0bf6cbdb2e9f03e1d42f8a540d8541d (patch)
tree5cc3e500ebb234ad82928de0ed680373c616dc44 /include/asm-generic/irqflags.h
parent9858c60cc2d33b18367b2bc6947e3ea23db26ccb (diff)
downloadlinux-linaro-stable-aafe4dbed0bf6cbdb2e9f03e1d42f8a540d8541d.tar.gz
asm-generic: add generic versions of common headers
These are all kernel internal interfaces that get copied around a lot. In most cases, architectures can provide their own optimized versions, but these generic versions can work as well. I have tried to use the most common contents of each header to allow existing architectures to migrate easily. Thanks to Remis for suggesting a number of cleanups. Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include/asm-generic/irqflags.h')
-rw-r--r--include/asm-generic/irqflags.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/include/asm-generic/irqflags.h b/include/asm-generic/irqflags.h
new file mode 100644
index 000000000000..9aebf618275a
--- /dev/null
+++ b/include/asm-generic/irqflags.h
@@ -0,0 +1,72 @@
+#ifndef __ASM_GENERIC_IRQFLAGS_H
+#define __ASM_GENERIC_IRQFLAGS_H
+
+/*
+ * All architectures should implement at least the first two functions,
+ * usually inline assembly will be the best way.
+ */
+#ifndef RAW_IRQ_DISABLED
+#define RAW_IRQ_DISABLED 0
+#define RAW_IRQ_ENABLED 1
+#endif
+
+/* read interrupt enabled status */
+#ifndef __raw_local_save_flags
+unsigned long __raw_local_save_flags(void);
+#endif
+
+/* set interrupt enabled status */
+#ifndef raw_local_irq_restore
+void raw_local_irq_restore(unsigned long flags);
+#endif
+
+/* get status and disable interrupts */
+#ifndef __raw_local_irq_save
+static inline unsigned long __raw_local_irq_save(void)
+{
+ unsigned long flags;
+ flags = __raw_local_save_flags();
+ raw_local_irq_restore(RAW_IRQ_DISABLED);
+ return flags;
+}
+#endif
+
+/* test flags */
+#ifndef raw_irqs_disabled_flags
+static inline int raw_irqs_disabled_flags(unsigned long flags)
+{
+ return flags == RAW_IRQ_DISABLED;
+}
+#endif
+
+/* unconditionally enable interrupts */
+#ifndef raw_local_irq_enable
+static inline void raw_local_irq_enable(void)
+{
+ raw_local_irq_restore(RAW_IRQ_ENABLED);
+}
+#endif
+
+/* unconditionally disable interrupts */
+#ifndef raw_local_irq_disable
+static inline void raw_local_irq_disable(void)
+{
+ raw_local_irq_restore(RAW_IRQ_DISABLED);
+}
+#endif
+
+/* test hardware interrupt enable bit */
+#ifndef raw_irqs_disabled
+static inline int raw_irqs_disabled(void)
+{
+ return raw_irqs_disabled_flags(__raw_local_save_flags());
+}
+#endif
+
+#define raw_local_save_flags(flags) \
+ do { (flags) = __raw_local_save_flags(); } while (0)
+
+#define raw_local_irq_save(flags) \
+ do { (flags) = __raw_local_irq_save(); } while (0)
+
+#endif /* __ASM_GENERIC_IRQFLAGS_H */