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https://github.com/brain-hackers/u-boot-brain
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d20a40de9d
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>
45 lines
1.5 KiB
C
45 lines
1.5 KiB
C
/*
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* (C) Copyright 2009
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* Marvell Semiconductor <www.marvell.com>
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* Written-by: Prafulla Wadaskar <prafulla@marvell.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*/
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#ifndef _UBOOT_CRC_H
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#define _UBOOT_CRC_H
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/* lib/crc32.c */
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uint32_t crc32 (uint32_t, const unsigned char *, uint);
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uint32_t crc32_wd (uint32_t, const unsigned char *, uint, uint);
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uint32_t crc32_no_comp (uint32_t, const unsigned char *, uint);
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/**
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* crc32_wd_buf - Perform CRC32 on a buffer and return result in buffer
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*
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* @input: Input buffer
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* @ilen: Input buffer length
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* @output: Place to put checksum result (4 bytes)
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* @chunk_sz: Trigger watchdog after processing this many bytes
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*/
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void crc32_wd_buf(const unsigned char *input, uint ilen,
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unsigned char *output, uint chunk_sz);
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#endif /* _UBOOT_CRC_H */
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