[lc_ctrl] Add script to generate the LC state based on the ECC poly
This adds a script to generate the life cycle state and transition
counter encoding according to the ECC polynomial used in OTP.
It generates values that can be incrementally written on top of each
other (in OTP) without causing ECC errors.
Signed-off-by: Michael Schaffner <msf@opentitan.org>
diff --git a/hw/ip/lc_ctrl/rtl/lc_ctrl_pkg.sv b/hw/ip/lc_ctrl/rtl/lc_ctrl_pkg.sv
index b7c1918..a9ca2ad 100644
--- a/hw/ip/lc_ctrl/rtl/lc_ctrl_pkg.sv
+++ b/hw/ip/lc_ctrl/rtl/lc_ctrl_pkg.sv
@@ -6,74 +6,7 @@
package lc_ctrl_pkg;
import prim_util_pkg::vbits;
-
- // TODO: need to generate these randomly, based on ECC
- // polynomial used inside the OTP macro.
- // The A/B values are used for the encoded LC state.
- parameter logic [15:0] A0 = 16'h0000;
- parameter logic [15:0] A1 = 16'h0000;
- parameter logic [15:0] A2 = 16'h0000;
- parameter logic [15:0] A3 = 16'h0000;
- parameter logic [15:0] A4 = 16'h0000;
- parameter logic [15:0] A5 = 16'h0000;
- parameter logic [15:0] A6 = 16'h0000;
- parameter logic [15:0] A7 = 16'h0000;
- parameter logic [15:0] A8 = 16'h0000;
- parameter logic [15:0] A9 = 16'h0000;
- parameter logic [15:0] A10 = 16'h0000;
- parameter logic [15:0] A11 = 16'h0000;
-
- parameter logic [15:0] B0 = 16'hFFFF;
- parameter logic [15:0] B1 = 16'hFFFF;
- parameter logic [15:0] B2 = 16'hFFFF;
- parameter logic [15:0] B3 = 16'hFFFF;
- parameter logic [15:0] B4 = 16'hFFFF;
- parameter logic [15:0] B5 = 16'hFFFF;
- parameter logic [15:0] B6 = 16'hFFFF;
- parameter logic [15:0] B7 = 16'hFFFF;
- parameter logic [15:0] B8 = 16'hFFFF;
- parameter logic [15:0] B9 = 16'hFFFF;
- parameter logic [15:0] B10 = 16'hFFFF;
- parameter logic [15:0] B11 = 16'hFFFF;
-
- // The C/D values are used for the encoded LC transition counter.
- parameter logic [15:0] C0 = 16'h0000;
- parameter logic [15:0] C1 = 16'h0000;
- parameter logic [15:0] C2 = 16'h0000;
- parameter logic [15:0] C3 = 16'h0000;
- parameter logic [15:0] C4 = 16'h0000;
- parameter logic [15:0] C5 = 16'h0000;
- parameter logic [15:0] C6 = 16'h0000;
- parameter logic [15:0] C7 = 16'h0000;
- parameter logic [15:0] C8 = 16'h0000;
- parameter logic [15:0] C9 = 16'h0000;
- parameter logic [15:0] C10 = 16'h0000;
- parameter logic [15:0] C11 = 16'h0000;
- parameter logic [15:0] C12 = 16'h0000;
- parameter logic [15:0] C13 = 16'h0000;
- parameter logic [15:0] C14 = 16'h0000;
- parameter logic [15:0] C15 = 16'h0000;
-
- parameter logic [15:0] D0 = 16'hFFFF;
- parameter logic [15:0] D1 = 16'hFFFF;
- parameter logic [15:0] D2 = 16'hFFFF;
- parameter logic [15:0] D3 = 16'hFFFF;
- parameter logic [15:0] D4 = 16'hFFFF;
- parameter logic [15:0] D5 = 16'hFFFF;
- parameter logic [15:0] D6 = 16'hFFFF;
- parameter logic [15:0] D7 = 16'hFFFF;
- parameter logic [15:0] D8 = 16'hFFFF;
- parameter logic [15:0] D9 = 16'hFFFF;
- parameter logic [15:0] D10 = 16'hFFFF;
- parameter logic [15:0] D11 = 16'hFFFF;
- parameter logic [15:0] D12 = 16'hFFFF;
- parameter logic [15:0] D13 = 16'hFFFF;
- parameter logic [15:0] D14 = 16'hFFFF;
- parameter logic [15:0] D15 = 16'hFFFF;
-
- // The E/F values are used for the encoded ID state.
- parameter logic [15:0] E0 = 16'h0000;
- parameter logic [15:0] F0 = 16'hFFFF;
+ import lc_ctrl_state_pkg::*;
/////////////////////////////////
// General Typedefs and Params //
@@ -93,7 +26,6 @@
typedef logic [LcTokenWidth-1:0] lc_token_t;
- // TODO: make this secret and generate randomly, given a specific ECC polynomial.
typedef enum logic [LcStateWidth-1:0] {
// Halfword idx : 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
LcStRaw = '0,
