[U-Boot] [PATCH] crc32: Correct endianness of crc32 result

Simon Glass
2013-04-05T23:11:10Z

When crc32 is handled by the hash library, it requires the data to be in
big-endian format, since it reads it byte-wise. Thus at present the 'crc32'
command reports incorrect data. For example, previously we might see:

Peach # crc32 40000000 100
CRC32 for 40000000 ... 400000ff ==> 0d968558

but instead with the hash library we see:

Peach # crc32 40000000 100
CRC32 for 40000000 ... 400000ff ==> 5885960d

Correct this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@google.com>
---
lib/crc32.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/lib/crc32.c b/lib/crc32.c
index 76205da..94720bf 100644
--- a/lib/crc32.c
+++ b/lib/crc32.c
@@ -10,6 +10,7 @@

#ifndef USE_HOSTCC
#include <common.h>
+#include <asm/unaligned.h>
#endif
#include <compiler.h>
#include <u-boot/crc.h>
@@ -256,5 +257,10 @@ void crc32_wd_buf(const unsigned char *input, unsigned int ilen,
uint32_t crc;

crc = crc32_wd(0, input, ilen, chunk_sz);
+#ifdef USE_HOSTCC
+ crc = htobe32(crc);
memcpy(output, &crc, sizeof(crc));
+#else
+ put_unaligned_be32(crc, output);
+#endif
}
--
1.8.1.3