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-rw-r--r--arch/microblaze/include/asm/irqflags.h119
1 files changed, 119 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/irqflags.h b/arch/microblaze/include/asm/irqflags.h
new file mode 100644
index 0000000000..818c6c9f55
--- /dev/null
+++ b/arch/microblaze/include/asm/irqflags.h
@@ -0,0 +1,119 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ */
+
+#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 */