projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 507bbe3e WD |
1 | /* |
| 2 | * include/asm-microblaze/byteorder.h -- Endian id and conversion ops | |
| 3 | * | |
| 4 | * Copyright (C) 2003 John Williams <[email protected]> | |
| 5 | * Copyright (C) 2001 NEC Corporation | |
| 6 | * Copyright (C) 2001 Miles Bader <[email protected]> | |
| 7 | * | |
| 8 | * This file is subject to the terms and conditions of the GNU General | |
| 9 | * Public License. See the file COPYING in the main directory of this | |
| 10 | * archive for more details. | |
| 11 | * | |
| 12 | * Written by Miles Bader <[email protected]> | |
| 13 | * Microblaze port by John Williams | |
| 14 | */ | |
| 15 | ||
| 16 | #ifndef __MICROBLAZE_BYTEORDER_H__ | |
| 17 | #define __MICROBLAZE_BYTEORDER_H__ | |
| 18 | ||
| 19 | #include <asm/types.h> | |
| 20 | ||
| 21 | #ifdef __GNUC__ | |
| 22 | ||
| 23 | /* This is effectively a dupe of the arch-independent byteswap | |
| 24 | code in include/linux/byteorder/swab.h, however we force a cast | |
| 25 | of the result up to 32 bits. This in turn forces the compiler | |
| 26 | to explicitly clear the high 16 bits, which it wasn't doing otherwise. | |
| 27 | ||
| 28 | I think this is a symptom of a bug in mb-gcc. JW 20040303 | |
| 29 | */ | |
| 30 | static __inline__ __const__ __u16 ___arch__swab16 (__u16 half_word) | |
| 31 | { | |
| 32 | /* 32 bit temp to cast result, forcing clearing of high word */ | |
| 33 | __u32 temp; | |
| 34 | ||
| 35 | temp = ((half_word & 0x00FFU) << 8) | ((half_word & 0xFF00U) >> 8); | |
| 36 | ||
| 37 | return (__u16) temp; | |
| 38 | } | |
| 39 | ||
| 40 | #define __arch__swab16(x) ___arch__swab16(x) | |
| 41 | ||
| 42 | /* Microblaze has no arch-specific endian conversion insns */ | |
| 43 | ||
| 44 | #if !defined(__STRICT_ANSI__) || defined(__KERNEL__) | |
| 45 | # define __BYTEORDER_HAS_U64__ | |
| 46 | # define __SWAB_64_THRU_32__ | |
| 47 | #endif | |
| 48 | ||
| 49 | #endif /* __GNUC__ */ | |
| 50 | ||
| 51 | #include <linux/byteorder/big_endian.h> | |
| 52 | ||
| 53 | #endif /* __MICROBLAZE_BYTEORDER_H__ */ |