55 lines
1.4 KiB
C
Executable File
55 lines
1.4 KiB
C
Executable File
/*
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* YAFFS: Yet another Flash File System . A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2018 Aleph One Ltd.
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1 as
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* published by the Free Software Foundation.
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*
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* Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
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*/
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#ifndef __YAFFS_ENDIAN_H__
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#define __YAFFS_ENDIAN_H__
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#include "yaffs_guts.h"
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#include "yaffs_packedtags2.h"
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static inline u32 swap_u32(u32 val)
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{
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return ((val >>24) & 0x000000ff) |
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((val >> 8) & 0x0000ff00) |
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((val << 8) & 0x00ff0000) |
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((val <<24) & 0xff000000);
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}
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#define swap_s32(val) \
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(s32)(swap_u32((u32)(val)))
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static inline loff_t swap_loff_t(loff_t lval)
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{
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u32 vall = swap_u32(FSIZE_LOW(lval));
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u32 valh;
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if (sizeof(loff_t) == sizeof(u32))
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return (loff_t) vall;
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valh = swap_u32(FSIZE_HIGH(lval));
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return FSIZE_COMBINE(vall, valh); /*NB: h and l are swapped. */
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}
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struct yaffs_dev;
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void yaffs_do_endian_s32(struct yaffs_dev *dev, s32 *val);
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void yaffs_do_endian_u32(struct yaffs_dev *dev, u32 *val);
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void yaffs_do_endian_oh(struct yaffs_dev *dev, struct yaffs_obj_hdr *oh);
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void yaffs_do_endian_packed_tags2(struct yaffs_dev *dev,
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struct yaffs_packed_tags2_tags_only *ptt);
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void yaffs_endian_config(struct yaffs_dev *dev);
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#endif
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