4 * Copyright (C) 1999 Linus Torvalds
5 * Copyright (C) 2000-2002 Transmeta Corporation
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License (Version 2) as
9 * published by the Free Software Foundation.
11 * cramfs interfaces to the uncompression library. There's really just
14 * - cramfs_uncompress_init() - called to initialize the thing.
15 * - cramfs_uncompress_exit() - tell me when you're done
16 * - cramfs_uncompress_block() - uncompress a block.
18 * NOTE NOTE NOTE! The uncompression is entirely single-threaded. We
19 * only have one stream, and we'll initialize it only once even if it
20 * then is used by multiple filesystems.
26 #include <u-boot/zlib.h>
28 static z_stream stream;
30 /* Returns length of decompressed data. */
31 int cramfs_uncompress_block (void *dst, void *src, int srclen)
35 inflateReset (&stream);
38 stream.avail_in = srclen;
40 stream.next_out = dst;
41 stream.avail_out = 4096 * 2;
43 err = inflate (&stream, Z_FINISH);
45 if (err != Z_STREAM_END)
47 return stream.total_out;
50 /*printf ("Error %d while decompressing!\n", err); */
51 /*printf ("%p(%d)->%p\n", src, srclen, dst); */
55 int cramfs_uncompress_init (void)
59 stream.zalloc = gzalloc;
60 stream.zfree = gzfree;
64 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
65 stream.outcb = (cb_func) WATCHDOG_RESET;
67 stream.outcb = Z_NULL;
68 #endif /* CONFIG_HW_WATCHDOG */
70 err = inflateInit (&stream);
72 printf ("Error: inflateInit2() returned %d\n", err);
79 int cramfs_uncompress_exit (void)