1 files changed, 48 insertions, 0 deletions
diff --git a/src/arch/riscv/include/bits/byteswap.h b/src/arch/riscv/include/bits/byteswap.h
new file mode 100644
index 000000000..56d03f64e
--- /dev/null
+++ b/src/arch/riscv/include/bits/byteswap.h
@@ -0,0 +1,48 @@
+#ifndef _BITS_BYTESWAP_H
+#define _BITS_BYTESWAP_H
+
+/** @file
+ *
+ * Byte-order swapping functions
+ *
+ */
+
+#include <stdint.h>
+
+FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
+
+extern __asmcall uint64_t riscv_swap_word ( uint64_t x );
+extern __asmcall unsigned long riscv_swap_half ( unsigned long x );
+extern __asmcall unsigned long riscv_swap_byte ( unsigned long x );
+
+static inline __attribute__ (( always_inline, const )) uint16_t
+__bswap_variable_16 ( uint16_t x ) {
+	return riscv_swap_byte ( x );
+}
+
+static inline __attribute__ (( always_inline )) void
+__bswap_16s ( uint16_t *x ) {
+	*x = riscv_swap_byte ( *x );
+}
+
+static inline __attribute__ (( always_inline, const )) uint32_t
+__bswap_variable_32 ( uint32_t x ) {
+	return riscv_swap_half ( x );
+}
+
+static inline __attribute__ (( always_inline )) void
+__bswap_32s ( uint32_t *x ) {
+	*x = riscv_swap_half ( *x );
+}
+
+static inline __attribute__ (( always_inline, const )) uint64_t
+__bswap_variable_64 ( uint64_t x ) {
+	return riscv_swap_word ( x );
+}
+
+static inline __attribute__ (( always_inline )) void
+__bswap_64s ( uint64_t *x ) {
+	*x = riscv_swap_word ( *x );
+}
+
+#endif /* _BITS_BYTESWAP_H */