* Fix problems caused by Robert Schwebel's cramfs patch
* 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)
diff --git a/include/cramfs/cramfs_fs.h b/include/cramfs/cramfs_fs.h
index 7b292c0c..2333709 100644
--- a/include/cramfs/cramfs_fs.h
+++ b/include/cramfs/cramfs_fs.h
@@ -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 @@
* 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 @@
*/
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 @@
| 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 */