Moved compile time debug access control of key to the API. Added correct code to mux key.

1 files changed, 11 insertions, 4 deletions

diff --git a/src/rtl/keywrap.v b/src/rtl/keywrap.v
index 5604ce4..786ab54 100644
--- a/src/rtl/keywrap.v
+++ b/src/rtl/keywrap.v
@@ -108,6 +108,11 @@ module keywrap #(parameter ADDR_BITS = 13)
   localparam PAD              = ADDR_BITS - 8;
 
 
+  // If set to one, will allow read access to key memory.
+  // Should be set to zero in all production FPGA bitstreams.
+  localparam DEBUG_MKM_READ = 1'h1;
+
+
   //----------------------------------------------------------------
   // Registers including update variables and write enable.
   //----------------------------------------------------------------
@@ -341,10 +346,12 @@ module keywrap #(parameter ADDR_BITS = 13)
               if (address == {{PAD{1'h0}}, ADDR_A1})
                 api_rd_delay_new = core_a_result[31 : 0];
 
-              // Not correct read key mux.
-              if ((address >= {{PAD{1'h0}}, ADDR_KEY0}) &&
-                   (address <= {{PAD{1'h0}}, ADDR_KEY7}))
-                api_rd_delay_new = core_read_key[031 : 000];
+              // Warning: Should be disabled after mkmif
+              // integration has been completed.
+              if (DEBUG_MKM_READ)
+                if ((address >= {{PAD{1'h0}},ADDR_KEY0}) && (address <= {{PAD{1'h0}}, ADDR_KEY7}))
+                  api_rd_delay_new = core_read_key[(7 - (address - {{PAD{1'h0}}, ADDR_KEY7})) * 32 +: 32];
+
             end // else: !if(we)
         end // if (cs)
     end // block: api