hw: use named default indices

Author: phsauter

rtl/croc_domain.sv

@@ -335,14 +335,16 @@ module croc_domain import croc_pkg::*; #(
     .rst_ni,
     .testmode_i,
 
-    .sbr_ports_req_i  ( {core_instr_obi_req, core_data_obi_req, dbg_req_obi_req, user_mgr_obi_req_i } ), // from managers towards subordinates
+    // connections between managers and crossbar
+    .sbr_ports_req_i  ( {core_instr_obi_req, core_data_obi_req, dbg_req_obi_req, user_mgr_obi_req_i } ),
     .sbr_ports_rsp_o  ( {core_instr_obi_rsp, core_data_obi_rsp, dbg_req_obi_rsp, user_mgr_obi_rsp_o } ),
-    .mgr_ports_req_o  ( all_sbr_obi_req ), // connections to subordinates
+    // connections between crossbar and subordinates
+    .mgr_ports_req_o  ( all_sbr_obi_req ), 
     .mgr_ports_rsp_i  ( all_sbr_obi_rsp ),
 
-    .addr_map_i       ( croc_addr_map   ),
-    .en_default_idx_i ( 4'b1111          ),
-    .default_idx_i    ( '0              )
+    .addr_map_i       ( croc_addr_map ),
+    .en_default_idx_i ( '1            ),
+    .default_idx_i    ( XbarError     )
   );
 
   // -----------------
@@ -435,13 +437,13 @@ module croc_domain import croc_pkg::*; #(
     .rule_t    ( addr_map_rule_t                ),
     .Napot     ( 1'b0                           )
   ) i_addr_decode_periphs (
-    .addr_i           ( xbar_periph_obi_req.a.addr  ),
-    .addr_map_i       ( periph_addr_map             ),
-    .idx_o            ( periph_idx                  ),
-    .dec_valid_o      (),
-    .dec_error_o      (),
-    .en_default_idx_i ( 1'b1 ),
-    .default_idx_i    ( '0 )
+    .addr_i           ( xbar_periph_obi_req.a.addr ),
+    .addr_map_i       ( periph_addr_map            ),
+    .idx_o            ( periph_idx                 ),
+    .dec_valid_o      ( ),
+    .dec_error_o      ( ),
+    .en_default_idx_i ( 1'b1        ),
+    .default_idx_i    ( PeriphError )
   );
 
   obi_demux #(

rtl/user_domain.sv

@@ -72,10 +72,10 @@ module user_domain import user_pkg::*; import croc_pkg::*; #(
     .addr_i           ( user_sbr_obi_req_i.a.addr ),
     .addr_map_i       ( user_addr_map             ),
     .idx_o            ( user_idx                  ),
-    .dec_valid_o      (),
-    .dec_error_o      (),
-    .en_default_idx_i ( 1'b1 ),
-    .default_idx_i    ( '0   )
+    .dec_valid_o      ( ),
+    .dec_error_o      ( ),
+    .en_default_idx_i ( 1'b1      ),
+    .default_idx_i    ( UserError )
   );
 
   obi_demux #(