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| author | Nick Vaccaro <nvaccaro@google.com> | 2020-08-27 11:44:38 -0700 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2020-08-28 14:20:30 +0000 |
| commit | 913ea9278f50b73427a50a54e91f8d5502d93219 (patch) | |
| tree | e33acaae2444dcb9825306bb1c60a50e6c073e92 /util/spd_tools/ddr4/README.md | |
| parent | 2afee1299176c643854941e49d74506e1d98fed3 (diff) | |
| download | coreboot-913ea9278f50b73427a50a54e91f8d5502d93219.tar.xz | |
util/gen_spd: translate DeviceBusWidth to die bus width
If a memory part is a x16 part that has two dies and only a single
rank, then the x16 describes the part width (since this solution will
need to be a stacked solution) and as such, we must translate the
DeviceBusWidth to the "die bus width" instead.
Change DeviceBusWidth variable name to PackageBusWidth to be more
descriptive
BUG=b:166645306, b:160157545
TEST=run gen_spd and verify that spds for parts matching description
above changed appropriately.
Change-Id: Ia6f3ca109d344b7a015da28125a94ce10d2bdfb8
Signed-off-by: Nick Vaccaro <nvaccaro@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44870
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'util/spd_tools/ddr4/README.md')
| -rw-r--r-- | util/spd_tools/ddr4/README.md | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/util/spd_tools/ddr4/README.md b/util/spd_tools/ddr4/README.md index 646d937d9b..75275441a2 100644 --- a/util/spd_tools/ddr4/README.md +++ b/util/spd_tools/ddr4/README.md @@ -59,7 +59,7 @@ Input JSON file requires the following two fields for every memory part: * `diesPerPackage`: Number of dies on the part. Valid values: `1, 2` dies per package. -* `deviceBusWidth`: Number of bits of the device's address bus. Valid values: +* `packageBusWidth`: Number of bits of the device's address bus. Valid values: `8, 16` bit-wide bus. NOTE: Width of x4 is not supported by this tool. * `ranksPerPackage`: From Jedec doc 4_01_02_AnnexL-1R23: @@ -145,7 +145,7 @@ string like "9 10 11 12 14". "CL_nRCD_nRP": 22 "capacityPerDieGb": 8, "diesPerPackage": 2, - "deviceBusWidth": 16, + "packageBusWidth": 16, "ranksPerPackage": 1, } }, @@ -156,7 +156,7 @@ string like "9 10 11 12 14". "CL_nRCD_nRP": 22 "capacityPerDieGb": 8, "diesPerPackage": 1, - "deviceBusWidth": 16, + "packageBusWidth": 16, "ranksPerPackage": 2, "casLatencies": "9 10 11 12 13 14 15 16 17 18 19 20", "tCKMaxPs": "1250" |