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-rw-r--r--include/lib/spinlock.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/lib/spinlock.h b/include/lib/spinlock.h
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+++ b/include/lib/spinlock.h
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+/*
+ * Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SPINLOCK_H
+#define SPINLOCK_H
+
+#ifndef __ASSEMBLER__
+
+#include <stdint.h>
+
+typedef struct spinlock {
+ volatile uint32_t lock;
+} spinlock_t;
+
+void spin_lock(spinlock_t *lock);
+void spin_unlock(spinlock_t *lock);
+
+#else
+
+/* Spin lock definitions for use in assembly */
+#define SPINLOCK_ASM_ALIGN 2
+#define SPINLOCK_ASM_SIZE 4
+
+#endif
+
+#endif /* SPINLOCK_H */