1 files changed, 70 insertions, 0 deletions
diff --git a/roms/opensbi/include/sbi/riscv_atomic.h b/roms/opensbi/include/sbi/riscv_atomic.h
new file mode 100644
index 000000000..3972e0b72
--- /dev/null
+++ b/roms/opensbi/include/sbi/riscv_atomic.h
@@ -0,0 +1,70 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ */
+
+#ifndef __RISCV_ATOMIC_H__
+#define __RISCV_ATOMIC_H__
+
+typedef struct {
+	volatile long counter;
+} atomic_t;
+
+#define ATOMIC_INIT(_lptr, val) (_lptr)->counter = (val)
+
+#define ATOMIC_INITIALIZER(val)   \
+	{                         \
+		.counter = (val), \
+	}
+
+long atomic_read(atomic_t *atom);
+
+void atomic_write(atomic_t *atom, long value);
+
+long atomic_add_return(atomic_t *atom, long value);
+
+long atomic_sub_return(atomic_t *atom, long value);
+
+long atomic_cmpxchg(atomic_t *atom, long oldval, long newval);
+
+long atomic_xchg(atomic_t *atom, long newval);
+
+unsigned int atomic_raw_xchg_uint(volatile unsigned int *ptr,
+				  unsigned int newval);
+
+unsigned long atomic_raw_xchg_ulong(volatile unsigned long *ptr,
+				    unsigned long newval);
+/**
+ * Set a bit in an atomic variable and return the new value.
+ * @nr : Bit to set.
+ * @atom: atomic variable to modify
+ */
+int atomic_set_bit(int nr, atomic_t *atom);
+
+/**
+ * Clear a bit in an atomic variable and return the new value.
+ * @nr : Bit to set.
+ * @atom: atomic variable to modify
+ */
+
+int atomic_clear_bit(int nr, atomic_t *atom);
+
+/**
+ * Set a bit in any address and return the new value .
+ * @nr : Bit to set.
+ * @addr: Address to modify
+ */
+int atomic_raw_set_bit(int nr, volatile unsigned long *addr);
+
+/**
+ * Clear a bit in any address and return the new value .
+ * @nr : Bit to set.
+ * @addr: Address to modify
+ */
+int atomic_raw_clear_bit(int nr, volatile unsigned long *addr);
+
+#endif