1 files changed, 91 insertions, 0 deletions

diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h
new file mode 100644
index 00000000000..aa11943b850
--- /dev/null
+++ b/arch/arm64/include/asm/irqflags.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_IRQFLAGS_H
+#define __ASM_IRQFLAGS_H
+
+#ifdef __KERNEL__
+
+#include <asm/ptrace.h>
+
+/*
+ * CPU interrupt mask handling.
+ */
+static inline unsigned long arch_local_irq_save(void)
+{
+        unsigned long flags;
+        asm volatile(
+                "mrs    %0, daif                // arch_local_irq_save\n"
+                "msr    daifset, #2"
+                : "=r" (flags)
+                :
+                : "memory");
+        return flags;
+}
+
+static inline void arch_local_irq_enable(void)
+{
+        asm volatile(
+                "msr    daifclr, #2             // arch_local_irq_enable"
+                :
+                :
+                : "memory");
+}
+
+static inline void arch_local_irq_disable(void)
+{
+        asm volatile(
+                "msr    daifset, #2             // arch_local_irq_disable"
+                :
+                :
+                : "memory");
+}
+
+#define local_fiq_enable()      asm("msr        daifclr, #1" : : : "memory")
+#define local_fiq_disable()     asm("msr        daifset, #1" : : : "memory")
+
+/*
+ * Save the current interrupt enable state.
+ */
+static inline unsigned long arch_local_save_flags(void)
+{
+        unsigned long flags;
+        asm volatile(
+                "mrs    %0, daif                // arch_local_save_flags"
+                : "=r" (flags)
+                :
+                : "memory");
+        return flags;
+}
+
+/*
+ * restore saved IRQ state
+ */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+        asm volatile(
+                "msr    daif, %0                // arch_local_irq_restore"
+        :
+        : "r" (flags)
+        : "memory");
+}
+
+static inline int arch_irqs_disabled_flags(unsigned long flags)
+{
+        return flags & PSR_I_BIT;
+}
+
+#endif
+#endif