| commit | 44add926979aeef643124f8b57a003f85dff3572 | [log] [tgz] |
|---|---|---|
| author | Rupert Swarbrick <rswarbrick@lowrisc.org> | Wed Apr 07 13:46:52 2021 +0100 |
| committer | Rupert Swarbrick <rswarbrick@gmail.com> | Wed Apr 07 21:24:18 2021 +0100 |
| tree | 9628ca7ccaa19db4bd06fd6e5476ba0213ecd43a | |
| parent | 564683d3907ba089969a3386a69312413181ec38 [diff] |
[keymgr,lint] Correct width for keymgr_stage_e enum The code in keymgr.sv sizes arrays (like adv_matrix, adv_dvalid, id_matrix) to have 2**StageWidth entries. Here, StageWidth is $clog2(KeyMgrStages) and is the number of bits needed to index into the 3 possible stages (corresponding to the three valid enum values of keymgr_stage_e). In fact, we index into these arrays with the "stage_sel_o" output of keymgr_ctrl, which can also have value 3 (= Disable). Anyway, Verilator was complaining because we used a 3-bit enum constant to index into an array of 4 entries. Fixing the enum width to 2 bits silences the warnings. Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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