Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / microblaze / include / asm / irqflags.h

diff --git a/kernel/arch/microblaze/include/asm/irqflags.h b/kernel/arch/microblaze/include/asm/irqflags.h
new file mode 100644 (file)
index 0000000..c9a6262
--- /dev/null
+++ b/kernel/arch/microblaze/include/asm/irqflags.h
@@ -0,0 +1,122 @@
+/*
+ * 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/types.h>
+#include <asm/registers.h>
+
+#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
+
+static inline notrace unsigned long arch_local_irq_save(void)
+{
+       unsigned long flags;
+       asm volatile("  msrclr %0, %1   \n"
+                    "  nop             \n"
+                    : "=r"(flags)
+                    : "i"(MSR_IE)
+                    : "memory");
+       return flags;
+}
+
+static inline notrace void arch_local_irq_disable(void)
+{
+       /* this uses r0 without declaring it - is that correct? */
+       asm volatile("  msrclr r0, %0   \n"
+                    "  nop             \n"
+                    :
+                    : "i"(MSR_IE)
+                    : "memory");
+}
+
+static inline notrace void arch_local_irq_enable(void)
+{
+       /* this uses r0 without declaring it - is that correct? */
+       asm volatile("  msrset  r0, %0  \n"
+                    "  nop             \n"
+                    :
+                    : "i"(MSR_IE)
+                    : "memory");
+}
+
+#else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
+
+static inline notrace unsigned long arch_local_irq_save(void)
+{
+       unsigned long flags, tmp;
+       asm volatile (" mfs     %0, rmsr        \n"
+                     " nop                     \n"
+                     " andi    %1, %0, %2      \n"
+                     " mts     rmsr, %1        \n"
+                     " nop                     \n"
+                     : "=r"(flags), "=r"(tmp)
+                     : "i"(~MSR_IE)
+                     : "memory");
+       return flags;
+}
+
+static inline notrace void arch_local_irq_disable(void)
+{
+       unsigned long tmp;
+       asm volatile("  mfs     %0, rmsr        \n"
+                    "  nop                     \n"
+                    "  andi    %0, %0, %1      \n"
+                    "  mts     rmsr, %0        \n"
+                    "  nop                     \n"
+                    : "=r"(tmp)
+                    : "i"(~MSR_IE)
+                    : "memory");
+}
+
+static inline notrace void arch_local_irq_enable(void)
+{
+       unsigned long tmp;
+       asm volatile("  mfs     %0, rmsr        \n"
+                    "  nop                     \n"
+                    "  ori     %0, %0, %1      \n"
+                    "  mts     rmsr, %0        \n"
+                    "  nop                     \n"
+                    : "=r"(tmp)
+                    : "i"(MSR_IE)
+                    : "memory");
+}
+
+#endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
+
+static inline notrace unsigned long arch_local_save_flags(void)
+{
+       unsigned long flags;
+       asm volatile("  mfs     %0, rmsr        \n"
+                    "  nop                     \n"
+                    : "=r"(flags)
+                    :
+                    : "memory");
+       return flags;
+}
+
+static inline notrace void arch_local_irq_restore(unsigned long flags)
+{
+       asm volatile("  mts     rmsr, %0        \n"
+                    "  nop                     \n"
+                    :
+                    : "r"(flags)
+                    : "memory");
+}
+
+static inline notrace bool arch_irqs_disabled_flags(unsigned long flags)
+{
+       return (flags & MSR_IE) == 0;
+}
+
+static inline notrace bool arch_irqs_disabled(void)
+{
+       return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
+#endif /* _ASM_MICROBLAZE_IRQFLAGS_H */