microblaze_v8: headers for irq

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 123 insertions, 0 deletions

diff --git a/arch/microblaze/include/asm/irqflags.h b/arch/microblaze/include/asm/irqflags.h
new file mode 100644
index 0000000..dea6564
--- /dev/null
+++ b/arch/microblaze/include/asm/irqflags.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _ASM_MICROBLAZE_IRQFLAGS_H
+#define _ASM_MICROBLAZE_IRQFLAGS_H
+
+#include <linux/irqflags.h>
+
+# if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
+
+# define local_irq_save(flags)				\
+	do {						\
+		asm volatile ("# local_irq_save	\n\t"	\
+				"msrclr %0, %1	\n\t"	\
+				"nop	\n\t"		\
+				: "=r"(flags)		\
+				: "i"(MSR_IE)		\
+				: "memory");		\
+	} while (0)
+
+# define local_irq_disable()					\
+	do {							\
+		asm volatile ("# local_irq_disable \n\t"	\
+				"msrclr r0, %0 \n\t"		\
+				"nop	\n\t"			\
+				:				\
+				: "i"(MSR_IE)			\
+				: "memory");			\
+	} while (0)
+
+# define local_irq_enable()					\
+	do {							\
+		asm volatile ("# local_irq_enable \n\t"		\
+				"msrset	r0, %0 \n\t"		\
+				"nop	\n\t"			\
+				:				\
+				: "i"(MSR_IE)			\
+				: "memory");			\
+	} while (0)
+
+# else /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR == 0 */
+
+# define local_irq_save(flags)					\
+	do {							\
+		register unsigned tmp;				\
+		asm volatile ("# local_irq_save	\n\t"		\
+				"mfs	%0, rmsr \n\t"		\
+				"nop \n\t"			\
+				"andi	%1, %0, %2 \n\t"	\
+				"mts	rmsr, %1 \n\t"		\
+				"nop \n\t"			\
+				: "=r"(flags), "=r" (tmp)	\
+				: "i"(~MSR_IE)			\
+				: "memory");			\
+	} while (0)
+
+# define local_irq_disable()					\
+	do {							\
+		register unsigned tmp;				\
+		asm volatile ("# local_irq_disable \n\t"	\
+				"mfs	%0, rmsr \n\t"		\
+				"nop \n\t"			\
+				"andi	%0, %0, %1 \n\t"	\
+				"mts	rmsr, %0 \n\t"		\
+				"nop \n\t"			\
+				: "=r"(tmp)			\
+				: "i"(~MSR_IE)			\
+				: "memory");			\
+	} while (0)
+
+# define local_irq_enable()					\
+	do {							\
+		register unsigned tmp;				\
+		asm volatile ("# local_irq_enable \n\t"		\
+				"mfs	%0, rmsr \n\t"		\
+				"nop \n\t"			\
+				"ori	%0, %0, %1 \n\t"	\
+				"mts	rmsr, %0 \n\t"		\
+				"nop \n\t"			\
+				: "=r"(tmp)			\
+				: "i"(MSR_IE)			\
+				: "memory");			\
+	} while (0)
+
+# endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
+
+#define local_save_flags(flags)					\
+	do {							\
+		asm volatile ("# local_save_flags \n\t"		\
+				"mfs	%0, rmsr \n\t"		\
+				"nop	\n\t"			\
+				: "=r"(flags)			\
+				:				\
+				: "memory");			\
+	} while (0)
+
+#define local_irq_restore(flags)			\
+	do {						\
+		asm volatile ("# local_irq_restore \n\t"\
+				"mts	rmsr, %0 \n\t"	\
+				"nop	\n\t"		\
+				:			\
+				: "r"(flags)		\
+				: "memory");		\
+	} while (0)
+
+static inline int irqs_disabled(void)
+{
+	unsigned long flags;
+
+	local_save_flags(flags);
+	return ((flags & MSR_IE) == 0);
+}
+
+#define raw_irqs_disabled irqs_disabled
+#define raw_irqs_disabled_flags(flags)	((flags) == 0)
+
+#endif /* _ASM_MICROBLAZE_IRQFLAGS_H */