GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/arch/m68k/include/asm/byteorder.h

@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
+ * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
+ */
+
+#ifndef _M68K_BYTEORDER_H
+#define _M68K_BYTEORDER_H
+
+#include <asm/types.h>
+
+#ifdef __GNUC__
+
+static inline __u32 __sw32(__u32 x)
+{
+	__u32 v = x;
+
+	return v << 24 |
+		(v & (__u32)0x0000ff00UL) <<  8 |
+		(v & (__u32)0x00ff0000UL) >>  8 |
+		v >> 24;
+}
+
+static inline __u16 __sw16(__u16 x)
+{
+	__u16 v = x;
+
+	return (v & (__u16)0x00ffU) << 8 |
+		(v & (__u16)0xff00U) >> 8;
+}
+
+static __inline__ unsigned ld_le16(const volatile unsigned short *addr)
+{
+	return __sw16(*addr);
+}
+
+static __inline__ void st_le16(volatile unsigned short *addr,
+			       const unsigned val)
+{
+	*addr = __sw16(val);
+}
+
+static __inline__ unsigned ld_le32(const volatile unsigned *addr)
+{
+	return __sw32(*addr);
+}
+
+static __inline__ void st_le32(volatile unsigned *addr, const unsigned val)
+{
+	*addr = __sw32(val);
+}
+
+#if 0
+/* alas, egcs sounds like it has a bug in this code that doesn't use the
+   inline asm correctly, and can cause file corruption. Until I hear that
+   it's fixed, I can live without the extra speed. I hope. */
+#if !(__GNUC__ >= 2 && __GNUC_MINOR__ >= 90)
+#if 0
+#  define __arch_swab16(x) ld_le16(&x)
+#  define __arch_swab32(x) ld_le32(&x)
+#else
+static __inline__ __attribute__ ((const))
+__u16 ___arch__swab16(__u16 value)
+{
+	return __sw16(value);
+}
+
+static __inline__ __attribute__ ((const))
+__u32 ___arch__swab32(__u32 value)
+{
+	return __sw32(value);
+}
+
+#define __arch__swab32(x) ___arch__swab32(x)
+#define __arch__swab16(x) ___arch__swab16(x)
+#endif				/* 0 */
+
+#endif
+
+/* The same, but returns converted value from the location pointer by addr. */
+#define __arch__swab16p(addr) ld_le16(addr)
+#define __arch__swab32p(addr) ld_le32(addr)
+
+/* The same, but do the conversion in situ, ie. put the value back to addr. */
+#define __arch__swab16s(addr) st_le16(addr,*addr)
+#define __arch__swab32s(addr) st_le32(addr,*addr)
+#endif
+
+#endif				/* __GNUC__ */
+
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
+#define __BYTEORDER_HAS_U64__
+#endif
+#include <linux/byteorder/big_endian.h>
+
+#endif				/* _M68K_BYTEORDER_H */