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* Fix problems caused by Robert Schwebel's cramfs patch

Browse Source 
* Patch by Scott McNutt, 02 Jan 2004:
  Add support for the Nios Active Serial Memory Interface (ASMI)
  on Cyclone devices

* Patch by Andrea Marson, 16 Dec 2003:
  Add support for the PPChameleon ME and HI modules

* Patch by Yuli Barcohen, 22 Dec 2003:
  Add support for Motorola DUET ADS board (MPC87x/88x)
This commit is contained in:
wdenk
2004-01-04 16:28:35 +00:00
parent dd875c767e
commit 180d3f74e4
38 changed files with 1828 additions and 1656 deletions
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70
include/cramfs/cramfs_fs.h
View File

@ -1,14 +1,6 @@
#ifndef __CRAMFS_H
#define __CRAMFS_H
#ifndef __KERNEL__
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned int u32;
#endif
#define CRAMFS_MAGIC 0x28cd3d45 /* some random number */
#define CRAMFS_SIGNATURE "Compressed ROMFS"
@ -16,12 +8,12 @@ typedef unsigned int u32;
* Width of various bitfields in struct cramfs_inode.
* Primarily used to generate warnings in mkcramfs.
*/
#define CRAMFS_MODE_WIDTH 16
#define CRAMFS_UID_WIDTH 16
#define CRAMFS_SIZE_WIDTH 24
#define CRAMFS_GID_WIDTH 8
#define CRAMFS_NAMELEN_WIDTH 6
#define CRAMFS_OFFSET_WIDTH 26
#define CRAMFS_MODE_WIDTH 16
#define CRAMFS_UID_WIDTH 16
#define CRAMFS_SIZE_WIDTH 24
#define CRAMFS_GID_WIDTH 8
#define CRAMFS_NAMELEN_WIDTH 6
#define CRAMFS_OFFSET_WIDTH 26
/*
* Since inode.namelen is a unsigned 6-bit number, the maximum cramfs
@ -34,8 +26,10 @@ typedef unsigned int u32;
*/
struct cramfs_inode {
u32 mode:CRAMFS_MODE_WIDTH, uid:CRAMFS_UID_WIDTH;
/* SIZE for device files is i_rdev */
u32 size:CRAMFS_SIZE_WIDTH, gid:CRAMFS_GID_WIDTH;
/* NAMELEN is the length of the file name, divided by 4 and
rounded up. (cramfs doesn't support hard links.) */
/* OFFSET: For symlinks and non-empty regular files, this
@ -90,9 +84,53 @@ struct cramfs_super {
| CRAMFS_FLAG_WRONG_SIGNATURE \
| CRAMFS_FLAG_SHIFTED_ROOT_OFFSET )
/*
* Since cramfs is little-endian, provide macros to swab the bitfields.
*/
#ifndef __BYTE_ORDER
#if defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
#define __BYTE_ORDER __LITTLE_ENDIAN
#elif defined(__BIG_ENDIAN) && !defined(__LITTLE_ENDIAN)
#define __BYTE_ORDER __BIG_ENDIAN
#else
#error "unable to define __BYTE_ORDER"
#endif
#endif /* not __BYTE_ORDER */
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define CRAMFS_16(x) (x)
#define CRAMFS_24(x) (x)
#define CRAMFS_32(x) (x)
#define CRAMFS_GET_NAMELEN(x) ((x)->namelen)
#define CRAMFS_GET_OFFSET(x) ((x)->offset)
#define CRAMFS_SET_OFFSET(x,y) ((x)->offset = (y))
#define CRAMFS_SET_NAMELEN(x,y) ((x)->namelen = (y))
#elif __BYTE_ORDER == __BIG_ENDIAN
#ifdef __KERNEL__
#define CRAMFS_16(x) swab16(x)
#define CRAMFS_24(x) ((swab32(x)) >> 8)
#define CRAMFS_32(x) swab32(x)
#else /* not __KERNEL__ */
#define CRAMFS_16(x) bswap_16(x)
#define CRAMFS_24(x) ((bswap_32(x)) >> 8)
#define CRAMFS_32(x) bswap_32(x)
#endif /* not __KERNEL__ */
#define CRAMFS_GET_NAMELEN(x) (((u8*)(x))[8] & 0x3f)
#define CRAMFS_GET_OFFSET(x) ((CRAMFS_24(((u32*)(x))[2] & 0xffffff) << 2) |\
((((u32*)(x))[2] & 0xc0000000) >> 30))
#define CRAMFS_SET_NAMELEN(x,y) (((u8*)(x))[8] = (((0x3f & (y))) | \
(0xc0 & ((u8*)(x))[8])))
#define CRAMFS_SET_OFFSET(x,y) (((u32*)(x))[2] = (((y) & 3) << 30) | \
CRAMFS_24((((y) & 0x03ffffff) >> 2)) | \
(((u32)(((u8*)(x))[8] & 0x3f)) << 24))
#else
#error "__BYTE_ORDER must be __LITTLE_ENDIAN or __BIG_ENDIAN"
#endif
/* Uncompression interfaces to the underlying zlib */
int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen);
int cramfs_uncompress_block(void *dst, void *src, int srclen);
int cramfs_uncompress_init(void);
int cramfs_uncompress_exit(void);
#endif
#endif /* __CRAMFS_H */