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34 lines
945 B
C
34 lines
945 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2018 NXP
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*/
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/*
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* Boot command to get and set the PRIBLOB bitfield form the SCFGR register
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* of the CAAM IP. It is recommended to set this bitfield to 3 once your
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* encrypted boot image is ready, to prevent the generation of blobs usable
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* to decrypt an encrypted boot image.
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*/
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#include <asm/io.h>
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#include <common.h>
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#include <command.h>
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#include "../drivers/crypto/fsl_caam_internal.h"
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int do_priblob_write(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
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{
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writel((readl(CAAM_SCFGR) & 0xFFFFFFFC) | 3, CAAM_SCFGR);
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printf("New priblob setting = 0x%x\n", readl(CAAM_SCFGR) & 0x3);
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return 0;
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}
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U_BOOT_CMD(
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set_priblob_bitfield, 1, 0, do_priblob_write,
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"Set the PRIBLOB bitfield to 3",
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"<value>\n"
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" - Write 3 in PRIBLOB bitfield of SCFGR regiter of CAAM IP.\n"
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" Prevent the generation of blobs usable to decrypt an\n"
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" encrypted boot image."
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);
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