34 lines
945 B
C
34 lines
945 B
C
// 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(struct cmd_tbl *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."
|
|
);
|