| #!/usr/bin/env bash |
| # |
| # SPDX-License-Identifier: GPL-2.0-only |
| |
| mma_results_op_bin="${1}" |
| mma_results_op_bin_tmp="${mma_results_op_bin}".tmp |
| mma_cbmem_id="0x4d4d4144" |
| |
| show_usage() { |
| printf "usage: $(basename "${0}") <output_results.bin>\n" |
| printf "pass path of a bin file where you want to save results.\n" |
| } |
| |
| # |
| # main entry point |
| # |
| |
| main() { |
| if [ ! "${mma_results_op_bin}" ];then |
| show_usage |
| exit -1 |
| fi |
| |
| printf "Reading cbmem ...\n" |
| cbmem -r ${mma_cbmem_id} > "${mma_results_op_bin_tmp}" || \ |
| { |
| printf "error in executing cbmem utility\n" ; |
| exit -1; |
| } |
| |
| #format of o/p is : |
| # <mma_signature><mma_test_header+data> |
| # |
| # where, |
| # <mma_signature> is 32bit length string "MMAD" |
| # |
| # <mma_test_header+data> is the FULL HOB which coreboot |
| # receives from FSP |
| # <mma_test_header> is 22 bytes long at the start of the HOB. |
| # MMA data starts right after 26 bytes |
| # 26 bytes = (4 bytes of "MMAD" |
| # + 22 bytes of mma_test_header) |
| # |
| |
| mma_signature=$(dd if="${mma_results_op_bin_tmp}" bs=1 count=4 ) |
| |
| if [[ ${mma_signature} != "MMAD" ]];then |
| printf "MMA signature mismatch" > "${mma_results_op_bin}" |
| rm -r "${mma_results_op_bin_tmp}" |
| cbmem -l >> "${mma_results_op_bin}" |
| printf "MMA signature mismatch\n" |
| exit -1 |
| fi |
| |
| dd if="${mma_results_op_bin_tmp}" of="${mma_results_op_bin}" bs=1 skip=26 || \ |
| { |
| printf "error in generating "${mma_results_op_bin}"\n" ; |
| exit -1; |
| } |
| rm -r "${mma_results_op_bin_tmp}" |
| printf "MMA data saved to "${mma_results_op_bin}"\n" |
| } |
| |
| main "$@" |