diff options
Diffstat (limited to 'util/scripts')
| -rwxr-xr-x | util/scripts/decode_spd.sh | 76 | ||||
| -rw-r--r-- | util/scripts/description.md | 2 |
2 files changed, 78 insertions, 0 deletions
diff --git a/util/scripts/decode_spd.sh b/util/scripts/decode_spd.sh new file mode 100755 index 0000000000..9ab9fa30cf --- /dev/null +++ b/util/scripts/decode_spd.sh @@ -0,0 +1,76 @@ +#!/bin/bash +# +# This file is part of the coreboot project. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; version 2 of the License. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# +# Parses spd hex files and outputs the contents in various formats +# +# +# Outputs csv, set, and json in same folder as SPD_HEX_FILE +# +# Example: +# decode_spd.sh ../../src/mainboard/google/zork/spd/micron-MT40A512M16TB-062E-J.spd.hex +# +# Outputs ../../src/mainboard/google/zork/spd/micron-MT40A512M16TB-062E-J.spd.{json|csv|set} +# +# TODO: This script assumes bincfg binary is at ../bincfg/bincfg (which is the +# result of running the bincfg make), and the specs are at +# ../bincfg/*.spec. This dependency should be made more resilliant and +# configurable. + +set -e + +function read8 () { + echo $(( 16#$(xxd -s "${2}" -l 1 -p "${1}") )) +} + +for file in "$@" +do + bintmp=$(mktemp) + outfile="${file%.hex}.set" + + echo "Decoding ${file}, outputting to ${outfile}" + + grep -v '^#' "${file}" | xxd -r -p - "${bintmp}" + dram_type=$(read8 "${bintmp}" 2) + if [ ! "${dram_type}" -eq 12 ] + then + #TODO: Handle other dram types + printf "Error: Expecting dram4 (12), got %d\n" "${dram_type}" + continue + fi + + revision=$(read8 "${bintmp}" 1) + if [ ! "${revision}" -eq $((0x13)) ] + then + printf "Warning: Expecting revision 0x13, got 0x%x.\n" "${revision}" + fi + + module_type=$(read8 "${bintmp}" 3) + case "${module_type}" in + 1) # RDIMM + spec="../bincfg/ddr4_registered_spd_512.spec" + ;; + 2 | 3) #UDIMM | SO-DIMM + spec="../bincfg/ddr4_unbuffered_spd_512.spec" + ;; + * ) + printf "Error: Unhandled module type %d.\n" "${module_type}" + ;; + esac + + ../bincfg/bincfg -d "${spec}" "${bintmp}" "${outfile}" + grep -v '^#' "${outfile}" | sed -e 's/ = \([^,]\+\)/: "\1"/g' \ + > "${file%.hex}.json" + grep -v -e '^#' -e '^{' -e '^}' "${outfile}" | sed -e 's/=/,/g' \ + > "${file%.hex}.csv" +done diff --git a/util/scripts/description.md b/util/scripts/description.md index 1f4e7df042..a08771d48d 100644 --- a/util/scripts/description.md +++ b/util/scripts/description.md @@ -3,6 +3,8 @@ __scripts__ line `Bash` * _cross-repo-cherrypick_ - Pull in patches from another tree from a gerrit repository. `Shell` + * _decode_spd.sh_ - Decodes Serial Presence Detect (SPD) files into + various human readable formats. * _dts-to-fmd.sh_ -Converts a depthcharge fmap.dts into an fmaptool compatible .fmd format `Bash` * _find-unused-kconfig-symbols.sh_ - Points out Kconfig variables |