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3b52337c75
Mark the crc8 code as needed by relocation. This is used as a simple check against corruption of the code when copying. Signed-off-by: Simon Glass <sjg@chromium.org>
42 lines
730 B
C
42 lines
730 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2013 Google, Inc
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*/
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#ifdef USE_HOSTCC
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#include <arpa/inet.h>
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#endif
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#include <asm/sections.h>
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#include <u-boot/crc.h>
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#define POLY (0x1070U << 3)
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__rcode static unsigned char _crc8(unsigned short data)
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{
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int i;
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for (i = 0; i < 8; i++) {
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if (data & 0x8000)
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data = data ^ POLY;
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data = data << 1;
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}
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return (unsigned char)(data >> 8);
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}
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__rcode unsigned int crc8(unsigned int crc, const unsigned char *vptr, int len)
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{
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int i;
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for (i = 0; i < len; i++)
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crc = _crc8((crc ^ vptr[i]) << 8);
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return crc;
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}
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void crc8_wd_buf(const unsigned char *input, unsigned int len,
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unsigned char output[1], unsigned int chunk_sz)
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{
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*output = crc8(0, input, len);
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}
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