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/*
* Copyright 2008-2015 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*
* Command for encapsulating DEK blob
*/
#include <common.h>
#include <command.h>
#include <environment.h>
#include <malloc.h>
#include <asm/byteorder.h>
#include <linux/compiler.h>
#include <fsl_sec.h>
#include <asm/arch/clock.h>
#include <mapmem.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* blob_dek() - Encapsulate the DEK as a blob using CAM's Key
* @src: - Address of data to be encapsulated
* @dst: - Desination address of encapsulated data
* @len: - Size of data to be encapsulated
*
* Returns zero on success,and negative on error.
*/
static int blob_encap_dek(const u8 *src, u8 *dst, u32 len)
{
int ret = 0;
u32 jr_size = 4;
u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + 0x102c);
if (out_jr_size != jr_size) {
hab_caam_clock_enable(1);
sec_init();
}
if (!((len == 128) | (len == 192) | (len == 256))) {
debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
return -1;
}
len /= 8;
ret = blob_dek(src, dst, len);
return ret;
}
/**
* do_dek_blob() - Handle the "dek_blob" command-line command
* @cmdtp: Command data struct pointer
* @flag: Command flag
* @argc: Command-line argument count
* @argv: Array of command-line arguments
*
* Returns zero on success, CMD_RET_USAGE in case of misuse and negative
* on error.
*/
static int do_dek_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
uint32_t src_addr, dst_addr, len;
uint8_t *src_ptr, *dst_ptr;
int ret = 0;
if (argc != 4)
return CMD_RET_USAGE;
src_addr = simple_strtoul(argv[1], NULL, 16);
dst_addr = simple_strtoul(argv[2], NULL, 16);
len = simple_strtoul(argv[3], NULL, 10);
src_ptr = map_sysmem(src_addr, len/8);
dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len/8));
ret = blob_encap_dek(src_ptr, dst_ptr, len);
return ret;
}
/***************************************************/
static char dek_blob_help_text[] =
"src dst len - Encapsulate and create blob of data\n"
" $len bits long at address $src and\n"
" store the result at address $dst.\n";
U_BOOT_CMD(
dek_blob, 4, 1, do_dek_blob,
"Data Encryption Key blob encapsulation",
dek_blob_help_text
);
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