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authorPaul Mundt <lethal@linux-sh.org>2012-01-12 08:11:43 +0400
committerPaul Mundt <lethal@linux-sh.org>2012-01-12 08:11:43 +0400
commitb1bdd255661369cb6eb90b6e181169b5e6d0f9b6 (patch)
tree17d15f3a6dc5bdd6205070dbef0e339421b13d25 /arch/c6x/include/asm/irqflags.h
parent9d14070f656addddce3d63fd483de46930b51850 (diff)
parentc1537b4863da620f12f5b42ece61bf65314148ed (diff)
downloadlinux-b1bdd255661369cb6eb90b6e181169b5e6d0f9b6.tar.xz
Merge branch 'sh/nommu' into sh-latest
Diffstat (limited to 'arch/c6x/include/asm/irqflags.h')
-rw-r--r--arch/c6x/include/asm/irqflags.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/c6x/include/asm/irqflags.h b/arch/c6x/include/asm/irqflags.h
new file mode 100644
index 000000000000..cf78e09e18c3
--- /dev/null
+++ b/arch/c6x/include/asm/irqflags.h
@@ -0,0 +1,72 @@
+/*
+ * C6X IRQ flag handling
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated
+ * Written by Mark Salter (msalter@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef _ASM_IRQFLAGS_H
+#define _ASM_IRQFLAGS_H
+
+#ifndef __ASSEMBLY__
+
+/* read interrupt enabled status */
+static inline unsigned long arch_local_save_flags(void)
+{
+ unsigned long flags;
+
+ asm volatile (" mvc .s2 CSR,%0\n" : "=b"(flags));
+ return flags;
+}
+
+/* set interrupt enabled status */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ asm volatile (" mvc .s2 %0,CSR\n" : : "b"(flags));
+}
+
+/* unconditionally enable interrupts */
+static inline void arch_local_irq_enable(void)
+{
+ unsigned long flags = arch_local_save_flags();
+ flags |= 1;
+ arch_local_irq_restore(flags);
+}
+
+/* unconditionally disable interrupts */
+static inline void arch_local_irq_disable(void)
+{
+ unsigned long flags = arch_local_save_flags();
+ flags &= ~1;
+ arch_local_irq_restore(flags);
+}
+
+/* get status and disable interrupts */
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags;
+
+ flags = arch_local_save_flags();
+ arch_local_irq_restore(flags & ~1);
+ return flags;
+}
+
+/* test flags */
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+ return (flags & 1) == 0;
+}
+
+/* test hardware interrupt enable bit */
+static inline int arch_irqs_disabled(void)
+{
+ return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_IRQFLAGS_H */