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| author | Simon Glass <sjg@chromium.org> | 2013-02-24 20:30:22 +0000 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2013-02-28 19:09:23 -0800 |
| commit | d20a40de9db07de1f1f06a79a4da1cdda5379b75 (patch) | |
| tree | 6d1952a17439f0ffa0fb09882f7a3df2a0e917e1 /include | |
| parent | d5b76673a5dfe0b5250baea3c36cdfa7a9fd5230 (diff) | |
| download | blackbird-obmc-uboot-d20a40de9db07de1f1f06a79a4da1cdda5379b75.tar.gz blackbird-obmc-uboot-d20a40de9db07de1f1f06a79a4da1cdda5379b75.zip | |
Roll crc32 into hash infrastructure
Add the CRC32 algorithm to the list of available hashes, and make
the crc32 command use hash_command(). Add a new crc32_wd_buf() to
make this possible, which puts its result in a buffer rather than
returning it as a 32-bit value.
Note: For some boards the hash command is not enabled, neither
are sha1, sha256 or the verify option. In this case the full
hash implementation adds about 500 bytes of overhead. So as a
special case, we use #ifdef to select very simple bahaviour in
that case. The justification for this is that it is currently
a very common case (virtually all boards enable crc32 but only
some enable more advanced features).
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/hash.h | 2 | ||||
| -rw-r--r-- | include/u-boot/crc.h | 11 |
2 files changed, 12 insertions, 1 deletions
diff --git a/include/hash.h b/include/hash.h index 88fa2b5a57..f2b2c4520d 100644 --- a/include/hash.h +++ b/include/hash.h @@ -22,7 +22,7 @@ #ifndef _HASH_H #define _HASH_H -#ifdef CONFIG_SHA1SUM_VERIFY +#if defined(CONFIG_SHA1SUM_VERIFY) || defined(CONFIG_CRC32_VERIFY) #define CONFIG_HASH_VERIFY #endif diff --git a/include/u-boot/crc.h b/include/u-boot/crc.h index 07badbfc5a..08e509edb4 100644 --- a/include/u-boot/crc.h +++ b/include/u-boot/crc.h @@ -30,4 +30,15 @@ uint32_t crc32 (uint32_t, const unsigned char *, uint); uint32_t crc32_wd (uint32_t, const unsigned char *, uint, uint); uint32_t crc32_no_comp (uint32_t, const unsigned char *, uint); +/** + * crc32_wd_buf - Perform CRC32 on a buffer and return result in buffer + * + * @input: Input buffer + * @ilen: Input buffer length + * @output: Place to put checksum result (4 bytes) + * @chunk_sz: Trigger watchdog after processing this many bytes + */ +void crc32_wd_buf(const unsigned char *input, uint ilen, + unsigned char *output, uint chunk_sz); + #endif /* _UBOOT_CRC_H */ |
