[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>
diff --git a/hw/ip/keymgr/rtl/keymgr_pkg.sv b/hw/ip/keymgr/rtl/keymgr_pkg.sv
index 7e8c544..d795f2e 100644
--- a/hw/ip/keymgr/rtl/keymgr_pkg.sv
+++ b/hw/ip/keymgr/rtl/keymgr_pkg.sv
@@ -82,7 +82,7 @@
parameter int KDFMaxWidth = 1600;
// Enumeration for operations
- typedef enum logic [2:0] {
+ typedef enum logic [1:0] {
Creator = 0,
OwnerInt = 1,
Owner = 2,
