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