jffs2-user.h

讲述LPC2468在无操作系统条件下使用YAFFS文件系统是如何实现的以及完整的测试代码,代码部分详见lpc2468_yaffs2.rar

/*
 * $Id: jffs2-user.h,v 1.1 2004/05/05 11:57:54 dwmw2 Exp $
 *
 * JFFS2 definitions for use in user space only
 */

#ifndef __JFFS2_USER_H__
#define __JFFS2_USER_H__

/* This file is blessed for inclusion by userspace */
#include <linux/jffs2.h>
#include <endian.h>
#include <byteswap.h>

#undef cpu_to_je16
#undef cpu_to_je32
#undef cpu_to_jemode
#undef je16_to_cpu
#undef je32_to_cpu
#undef jemode_to_cpu

extern int target_endian;

#define t16(x) ({ uint16_t __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
#define t32(x) ({ uint32_t __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })

#define cpu_to_je16(x) ((jint16_t){t16(x)})
#define cpu_to_je32(x) ((jint32_t){t32(x)})
#define cpu_to_jemode(x) ((jmode_t){t32(x)})

#define je16_to_cpu(x) (t16((x).v16))
#define je32_to_cpu(x) (t32((x).v32))
#define jemode_to_cpu(x) (t32((x).m))

#endif /* __JFFS2_USER_H__ */