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+/*
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+ * (C) Copyright 2014 Andreas Bießmann <andreas.devel@googlemail.com>
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+ *
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+ * SPDX-License-Identifier: GPL-2.0+
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+ */
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+
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+/*
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+ * This is a host tool for generating an appropriate string out of board
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+ * configuration. The string is required for correct generation of PMECC
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+ * header which in turn is required for NAND flash booting of Atmel AT91 style
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+ * hardware.
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+ *
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+ * See doc/README.atmel_pmecc for more information.
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+ */
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+
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+#include <config.h>
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+#include <stdlib.h>
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+
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+static int pmecc_get_ecc_bytes(int cap, int sector_size)
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+{
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+ int m = 12 + sector_size / 512;
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+ return (m * cap + 7) / 8;
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+}
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+
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+int main(int argc, char *argv[])
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+{
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+ unsigned int use_pmecc = 0;
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+ unsigned int sector_per_page;
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+ unsigned int sector_size = CONFIG_PMECC_SECTOR_SIZE;
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+ unsigned int oob_size = CONFIG_SYS_NAND_OOBSIZE;
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+ unsigned int ecc_bits = CONFIG_PMECC_CAP;
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+ unsigned int ecc_offset;
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+
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+#ifdef CONFIG_ATMEL_NAND_HW_PMECC
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+ use_pmecc = 1;
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+#endif
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+
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+ sector_per_page = CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_PMECC_SECTOR_SIZE;
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+ ecc_offset = oob_size -
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+ pmecc_get_ecc_bytes(ecc_bits, sector_size) * sector_per_page;
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+
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+ printf("usePmecc=%d,", use_pmecc);
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+ printf("sectorPerPage=%d,", sector_per_page);
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+ printf("sectorSize=%d,", sector_size);
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+ printf("spareSize=%d,", oob_size);
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+ printf("eccBits=%d,", ecc_bits);
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+ printf("eccOffset=%d", ecc_offset);
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+ printf("\n");
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+
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+ exit(EXIT_SUCCESS);
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+}
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