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