[top] Expand rom to 40b for slightly improved security properties
- Now all Rom nibbles will be fed through the 4-bit sbox, even if
only 1 round of permutation is done for scrambling
Signed-off-by: Timothy Chen <timothytim@google.com>
diff --git a/hw/top_earlgrey/data/top_earlgrey.hjson b/hw/top_earlgrey/data/top_earlgrey.hjson
index 0bbbbe3..cedd1dc 100755
--- a/hw/top_earlgrey/data/top_earlgrey.hjson
+++ b/hw/top_earlgrey/data/top_earlgrey.hjson
@@ -555,7 +555,7 @@
swaccess: "ro",
size: "0x4000",
// data integrity width
- integ_width: 7,
+ integ_width: 8,
inter_signal_list: [
{ struct: "tl"
package: "tlul_pkg"
