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util/spd_tools: Add ability to override SPD file for parts

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This commit adds the ability to override the SPD file that is used for a
specific part.

BUG=b:224884904
TEST=Verified that generated makefile uses specified SPD file and that
it remains unchanged when this capability is not used

Signed-off-by: Robert Zieba <robertzieba@google.com>
Change-Id: I078dd04fead2bf19f53bc6ca8295187d439adc20
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63281
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Rob Barnes <robbarnes@google.com>
This commit is contained in:
Robert Zieba
2022-04-01 09:48:28 -06:00
committed by Felix Held
parent be1a050772
commit 255b1fb38b
2 changed files with 64 additions and 27 deletions
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16
util/spd_tools/README.md
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@@ -459,14 +459,16 @@ This program takes the following inputs:
* 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. 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.
* 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.
Example of a CSV file using fixed and exclusive IDs:
Example of a CSV file using fixed and exclusive IDs, and SPD file overrides:
```
K4AAG165WA-BCWE,1
@@ -475,6 +477,8 @@ MT40A1G16KD-062E:E
K4A8G165WC-BCWE
H5AN8G6NDJR-XNC,8
H5ANAG6NCMR-XNC,*9
H9HCNNNCPMMLXR-NEE,,H9HCNNNCPMMLXR-NEE.hex
H54G56CYRBX247,4,H54G56CYRBX247.hex
```
Explanation: This will ensure that the SPDs for K4AAG165WA-BCWE and