1 files changed, 48 insertions, 0 deletions
diff --git a/roms/opensbi/include/sbi/sbi_const.h b/roms/opensbi/include/sbi/sbi_const.h
new file mode 100644
index 000000000..37866546a
--- /dev/null
+++ b/roms/opensbi/include/sbi/sbi_const.h
@@ -0,0 +1,48 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ */
+
+#ifndef __SBI_CONST_H__
+#define __SBI_CONST_H__
+
+/*
+ * Some constant macros are used in both assembler and
+ * C code.  Therefore we cannot annotate them always with
+ * 'UL' and other type specifiers unilaterally.  We
+ * use the following macros to deal with this.
+ *
+ * Similarly, _AT() will cast an expression with a type in C, but
+ * leave it unchanged in asm.
+ */
+
+/* clang-format off */
+
+#ifdef __ASSEMBLY__
+#define _AC(X,Y)	X
+#define _AT(T,X)	X
+#else
+#define __AC(X,Y)	(X##Y)
+#define _AC(X,Y)	__AC(X,Y)
+#define _AT(T,X)	((T)(X))
+#endif
+
+#define _UL(x)		(_AC(x, UL))
+#define _ULL(x)		(_AC(x, ULL))
+
+#define _BITUL(x)	(_UL(1) << (x))
+#define _BITULL(x)	(_ULL(1) << (x))
+
+#define UL(x)		(_UL(x))
+#define ULL(x)		(_ULL(x))
+
+#define __STR(s)	#s
+#define STRINGIFY(s)	__STR(s)
+
+/* clang-format on */
+
+#endif