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