LXR uboot/arch/arm/mach-imx/cmd

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright 2008-2015 Freescale Semiconductor, Inc.
   4 *
   5 * Command for encapsulating DEK blob
   6 */
   7
   8#include <common.h>
   9#include <command.h>
  10#include <environment.h>
  11#include <malloc.h>
  12#include <asm/byteorder.h>
  13#include <linux/compiler.h>
  14#include <fsl_sec.h>
  15#include <asm/arch/clock.h>
  16#include <mapmem.h>
  17
  18/**
  19* blob_dek() - Encapsulate the DEK as a blob using CAM's Key
  20* @src: - Address of data to be encapsulated
  21* @dst: - Desination address of encapsulated data
  22* @len: - Size of data to be encapsulated
  23*
  24* Returns zero on success,and negative on error.
  25*/
  26static int blob_encap_dek(const u8 *src, u8 *dst, u32 len)
  27{
  28        int ret = 0;
  29        u32 jr_size = 4;
  30
  31        u32 out_jr_size = sec_in32(CONFIG_SYS_FSL_JR0_ADDR + 0x102c);
  32        if (out_jr_size != jr_size) {
  33                hab_caam_clock_enable(1);
  34                sec_init();
  35        }
  36
  37        if (!((len == 128) | (len == 192) | (len == 256))) {
  38                debug("Invalid DEK size. Valid sizes are 128, 192 and 256b\n");
  39                return -1;
  40        }
  41
  42        len /= 8;
  43        ret = blob_dek(src, dst, len);
  44
  45        return ret;
  46}
  47
  48/**
  49 * do_dek_blob() - Handle the "dek_blob" command-line command
  50 * @cmdtp:  Command data struct pointer
  51 * @flag:   Command flag
  52 * @argc:   Command-line argument count
  53 * @argv:   Array of command-line arguments
  54 *
  55 * Returns zero on success, CMD_RET_USAGE in case of misuse and negative
  56 * on error.
  57 */
  58static int do_dek_blob(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  59{
  60        uint32_t src_addr, dst_addr, len;
  61        uint8_t *src_ptr, *dst_ptr;
  62        int ret = 0;
  63
  64        if (argc != 4)
  65                return CMD_RET_USAGE;
  66
  67        src_addr = simple_strtoul(argv[1], NULL, 16);
  68        dst_addr = simple_strtoul(argv[2], NULL, 16);
  69        len = simple_strtoul(argv[3], NULL, 10);
  70
  71        src_ptr = map_sysmem(src_addr, len/8);
  72        dst_ptr = map_sysmem(dst_addr, BLOB_SIZE(len/8));
  73
  74        ret = blob_encap_dek(src_ptr, dst_ptr, len);
  75
  76        return ret;
  77}
  78
  79/***************************************************/
  80static char dek_blob_help_text[] =
  81        "src dst len            - Encapsulate and create blob of data\n"
  82        "                         $len bits long at address $src and\n"
  83        "                         store the result at address $dst.\n";
  84
  85U_BOOT_CMD(
  86        dek_blob, 4, 1, do_dek_blob,
  87        "Data Encryption Key blob encapsulation",
  88        dek_blob_help_text
  89);
  90