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authorWolfgang Denk <wd@pollux.(none)>2005-09-25 16:59:36 +0200
committerWolfgang Denk <wd@pollux.(none)>2005-09-25 16:59:36 +0200
commitb66eb5282d568225abad5b3b61cc0968be35fc0d (patch)
tree7f2655d0895a4601d55734103f359c47f1313e4b /include/cramfs/cramfs_fs.h
parentbd51626c8df13b5319424352019115750d6d1186 (diff)
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Add cramfs support for m68k
Patch by Zachary Landau, 21 Feb 2005
Diffstat (limited to 'include/cramfs/cramfs_fs.h')
-rw-r--r--include/cramfs/cramfs_fs.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/cramfs/cramfs_fs.h b/include/cramfs/cramfs_fs.h
index e0c14f0..9f1b1d5 100644
--- a/include/cramfs/cramfs_fs.h
+++ b/include/cramfs/cramfs_fs.h
@@ -84,6 +84,7 @@ struct cramfs_super {
| CRAMFS_FLAG_WRONG_SIGNATURE \
| CRAMFS_FLAG_SHIFTED_ROOT_OFFSET )
+#if __BYTE_ORDER == __LITTLE_ENDIAN
#define CRAMFS_16(x) (x)
#define CRAMFS_24(x) (x)
#define CRAMFS_32(x) (x)
@@ -91,6 +92,27 @@ struct cramfs_super {
#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, void *src, int srclen);