Adding support for SW to keep loaded key alive by reading status. Adding support for SW to trigger zeroisation of a loaded key.

1 files changed, 12 insertions, 5 deletions

diff --git a/src/tb/tb_keywrap_core.v b/src/tb/tb_keywrap_core.v
index 1212ad7..7f9c42d 100644
--- a/src/tb/tb_keywrap_core.v
+++ b/src/tb/tb_keywrap_core.v
@@ -69,6 +69,8 @@ module tb_keywrap_core();
   wire                          tb_valid;
   wire                          tb_loaded;
   reg [31 : 0]                  tb_timeout;
+  reg                           tb_ping;
+  reg                           tb_zeroise;
   reg [(RLEN_BITS - 1) : 0]     tb_rlen;
   reg [255 : 0]                 tb_key;
   reg                           tb_keylen;
@@ -97,6 +99,8 @@ module tb_keywrap_core();
                    .loaded(tb_loaded),
 
                    .timeout(tb_timeout),
+                   .ping(tb_ping),
+                   .zeroise(tb_zeroise),
 
                    .rlen(tb_rlen),
                    .key(tb_key),
@@ -152,14 +156,17 @@ module tb_keywrap_core();
       tb_clk     = 0;
       tb_reset_n = 0;
 
-      tb_init        = 0;
-      tb_next        = 0;
-      tb_encdec      = 0;
+      tb_init        = 1'h0;
+      tb_next        = 1'h0;
+      tb_encdec      = 1'h0;
       tb_rlen        = 13'h0;
       tb_key         = 256'h0;
-      tb_keylen      = 0;
+      tb_keylen      = 1'h0;
+      tb_timeout     = 32'hdeadbeef;
+      tb_ping        = 1'h0;
+      tb_zeroise     = 1'h0;
       tb_a_init      = 64'h0;
-      tb_api_we      = 0;
+      tb_api_we      = 1'h0;
       tb_api_addr    = 14'h0;
       tb_api_wr_data = 32'h0;