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