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authorBruce Griffith <Bruce.Griffith@se-eng.com>2014-07-16 11:25:21 -0600
committerBruce Griffith <Bruce.Griffith@se-eng.com>2014-08-30 00:28:06 +0200
commit3a2310e05c971e3b46e9e91886bbc467ae49cdb6 (patch)
tree26c8d9981dd2bb83f39cd2731ee8c61f9e4c80a0 /src
parent71c0bf6202bee2c17b3e64b377038207f6018dc6 (diff)
AMD Steppe Eagle: Add 32-bit Fletcher's Checksum computation
The AMD Platform Security Processor (PSP) requires a Fletcher's Checksum at the end of the PSP directory. This code implements a Fletcher's Checksum by reading bytes from stdin and writes the bytes back to stdout with a checksum inserted into the byte stream at the appropriate offset. This utility is used on PSP binaries during coreboot build. Include a runtime debug option such that the command: fletcher --print <file.bin >file_with_cksum.bin will print out the computed checksum value for debugging. The compile-time debug option is retained that allows -DDEBUG to be added to the compilation line. This option has the same effect as "--print". Change-Id: I506a479d8204ca4f8267d53aa152ac4b473dbc75 Signed-off-by: Bruce Griffith <Bruce.Griffith@se-eng.com> Reviewed-on: http://review.coreboot.org/6676 Reviewed-by: WANG Siyuan <wangsiyuanbuaa@gmail.com> Tested-by: build bot (Jenkins) Reviewed-by: Zheng Bao <zheng.bao@amd.com>
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