1 files changed, 34 insertions, 0 deletions
diff --git a/roms/opensbi/include/sbi/riscv_locks.h b/roms/opensbi/include/sbi/riscv_locks.h
new file mode 100644
index 000000000..55da7c01c
--- /dev/null
+++ b/roms/opensbi/include/sbi/riscv_locks.h
@@ -0,0 +1,34 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ */
+
+#ifndef __RISCV_LOCKS_H__
+#define __RISCV_LOCKS_H__
+
+typedef struct {
+	volatile long lock;
+} spinlock_t;
+
+#define __RISCV_SPIN_UNLOCKED 0
+
+#define SPIN_LOCK_INIT(_lptr) (_lptr)->lock = __RISCV_SPIN_UNLOCKED
+
+#define SPIN_LOCK_INITIALIZER                  \
+	{                                      \
+		.lock = __RISCV_SPIN_UNLOCKED, \
+	}
+
+int spin_lock_check(spinlock_t *lock);
+
+int spin_trylock(spinlock_t *lock);
+
+void spin_lock(spinlock_t *lock);
+
+void spin_unlock(spinlock_t *lock);
+
+#endif