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Diffstat (limited to 'util/spd_tools/README.md')
| -rw-r--r-- | util/spd_tools/README.md | 46 |
1 files changed, 27 insertions, 19 deletions
diff --git a/util/spd_tools/README.md b/util/spd_tools/README.md index 54a38e6bc7..bed34601cc 100644 --- a/util/spd_tools/README.md +++ b/util/spd_tools/README.md @@ -32,10 +32,15 @@ IDs (configure DRAM hardware straps) for any memory part used by a board. This program takes the following inputs: -* A JSON file containing a global list of memory parts with their attributes - as per the datasheet. This is the list of all known memory parts for the - given memory technology. -* The memory technology for which to generate the SPDs, e.g. "lp4x". +* Path to a JSON file containing a global list of memory parts with their + attributes as per the datasheet. This is the list of all known memory parts + for the given memory technology. + +* The memory technology for which to generate the SPDs, + One of: + ddr4, + lp4x, + lp5 The input JSON file requires the following two fields for every memory part: @@ -456,20 +461,21 @@ The files generated are: ## Tool 2 - `part_id_gen` -This program takes the following inputs: +This program takes the following 4 inputs: + +* 1) The SoC platform which the board is based on, e.g. ADL. +* 2) The memory technology used by the board, One of ddr4, lp4x, or lp5. +* 3) The path to the directory where the generated Makefile.inc should be placed. +* 4) A CSV file containing a list of the memory parts used by the board, with an + optional fixed or exclusive ID for each part and an optional SPD override file. + A fixed ID is simply an integer and it ensure that part (and any that share the + same SPD) will be assigned that ID. An exclusive ID is prefixed with `*` and ensures + that only parts with the same exclusive ID will be assigned that ID, even if they would + otherwise share the same ID. When using an SPD override file, the file will be searched + for in the directory where mem_parts_used is located, if it is not found there then it + will be searched for in the appropriate default spd directory. -* The SoC platform which the board is based on, e.g. ADL. -* The memory technology used by the board, e.g. lp4x. -* The path to the directory where the generated Makefile.inc should be placed. -* A CSV file containing a list of the memory parts used by the board, with an -* optional fixed or exclusive ID for each part and an optional SPD override file. -* A fixed ID is simply an integer and it ensure that part (and any that share the same SPD) -* will be assigned that ID. An exclusive ID is prefixed with `*` and ensures that -* only parts with the same exclusive ID will be assigned that ID, even if they would -* otherwise share the same ID. When using an SPD override file, the file will be searched -* for in the directory where mem_parts_used is located, if it is not found there then it -* will be searched for in the appropriate default spd directory. -* NOTE: Only assign a fixed/exclusive ID if required for legacy reasons. + NOTE: Only assign a fixed/exclusive ID if required for legacy reasons. Example of a CSV file using fixed and exclusive IDs, and SPD file overrides: @@ -560,10 +566,12 @@ Usage: util/spd_tools/bin/spd_gen <mem_parts_list_json> <mem_technology> ``` -Example: +Usage Examples: ``` +util/spd_tools/bin/spd_gen spd/ddr4/memory_parts.json ddr4 util/spd_tools/bin/spd_gen spd/lp4x/memory_parts.json lp4x +util/spd_tools/bin/spd_gen spd/lp5/memory_parts.json lp5 ``` ### `part_id_gen` @@ -574,7 +582,7 @@ Usage: util/spd_tools/bin/part_id_gen <platform> <mem_technology> <makefile_dir> <mem_parts_used_file> ``` -Example: +Usage Example: ``` util/spd_tools/bin/part_id_gen \ |