util/mma/mma_get_result.sh

   1 #!/usr/bin/env bash
   2
   3 #
   4 # This file is part of the coreboot project.
   5 #
   6 # Copyright (C) 2015 Intel Corporation.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; version 2 of the License.
  11 #
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17
  18 mma_results_op_bin="${1}"
  19 mma_results_op_bin_tmp="${mma_results_op_bin}".tmp
  20 mma_cbmem_id="0x4d4d4144"
  21
  22 show_usage() {
  23         printf "usage: $(basename "${0}") <output_results.bin>\n"
  24         printf "pass path of a bin file where you want to save results.\n"
  25 }
  26
  27 #
  28 # main entry point
  29 #
  30
  31 main() {
  32         if [ ! "${mma_results_op_bin}" ];then
  33                 show_usage
  34                 exit -1
  35         fi
  36
  37         printf "Reading cbmem ...\n"
  38         cbmem -r ${mma_cbmem_id} > "${mma_results_op_bin_tmp}" || \
  39                 {
  40                         printf "error in executing cbmem utility\n" ;
  41                         exit -1;
  42                 }
  43
  44         #format of o/p is :
  45         # <mma_signature><mma_test_header+data>
  46         #
  47         # where,
  48         # <mma_signature> is 32bit length string "MMAD"
  49         #
  50         # <mma_test_header+data>  is the FULL HOB which coreboot
  51         #                         receives from FSP
  52         # <mma_test_header> is 22 bytes long at the start of the HOB.
  53         #                   MMA data starts right after 26 bytes
  54         #                   26 bytes = (4 bytes of "MMAD"
  55         #                               + 22 bytes of mma_test_header)
  56         #
  57
  58         mma_signature=$(dd if="${mma_results_op_bin_tmp}" bs=1 count=4 )
  59
  60         if [[ ${mma_signature} != "MMAD" ]];then
  61                 printf "MMA signature mismatch" > "${mma_results_op_bin}"
  62                 rm -r "${mma_results_op_bin_tmp}"
  63                 cbmem -l >> "${mma_results_op_bin}"
  64                 printf "MMA signature mismatch\n"
  65                 exit -1
  66         fi
  67
  68         dd if="${mma_results_op_bin_tmp}" of="${mma_results_op_bin}" bs=1 skip=26 || \
  69                 {
  70                         printf "error in generating "${mma_results_op_bin}"\n" ;
  71                         exit -1;
  72                 }
  73         rm -r "${mma_results_op_bin_tmp}"
  74         printf "MMA data saved to "${mma_results_op_bin}"\n"
  75 }
  76
  77 main "$@"