| // Copyright lowRISC contributors. |
| // Licensed under the Apache License, Version 2.0, see LICENSE for details. |
| // SPDX-License-Identifier: Apache-2.0 |
| // |
| // State definitions for entropy_src_main_sm, provided as a separate package for use in DV |
| |
| package entropy_src_main_sm_pkg; |
| |
| // Encoding generated with: |
| // $ ./util/design/sparse-fsm-encode.py -d 3 -m 21 -n 9 \ |
| // -s 2359261201 --language=sv |
| // |
| // Hamming distance histogram: |
| // |
| // 0: -- |
| // 1: -- |
| // 2: -- |
| // 3: |||||||||||| (19.05%) |
| // 4: |||||||||||||||||||| (30.48%) |
| // 5: ||||||||||||||||| (26.19%) |
| // 6: |||||||||| (15.71%) |
| // 7: ||| (5.71%) |
| // 8: | (2.38%) |
| // 9: (0.48%) |
| // |
| // Minimum Hamming distance: 3 |
| // Maximum Hamming distance: 9 |
| // Minimum Hamming weight: 1 |
| // Maximum Hamming weight: 8 |
| // |
| |
| localparam int StateWidth = 9; |
| |
| typedef enum logic [StateWidth-1:0] { |
| Idle = 9'b011110101, // idle |
| BootHTRunning = 9'b111010010, // boot mode, wait for health test done pulse |
| BootPostHTChk = 9'b101101110, // boot mode, wait for post health test packer not empty state |
| BootPhaseDone = 9'b010001110, // boot mode, stay here until master enable is off |
| StartupHTStart = 9'b000101100, // startup mode, pulse the sha3 start input |
| StartupPhase1 = 9'b100000001, // startup mode, look for first test pass/fail |
| StartupPass1 = 9'b110100101, // startup mode, look for first test pass/fail, done if pass |
| StartupFail1 = 9'b000010111, // startup mode, look for second fail, alert if fail |
| ContHTStart = 9'b001000000, // continuous test mode, pulse the sha3 start input |
| ContHTRunning = 9'b110100010, // continuous test mode, wait for health test done pulse |
| FWInsertStart = 9'b011000011, // fw ov mode, start the sha3 block |
| FWInsertMsg = 9'b001011001, // fw ov mode, insert fw message into sha3 block |
| Sha3MsgDone = 9'b100001111, // sha3 mode, all input messages added, ready to process |
| Sha3Prep = 9'b011111000, // sha3 mode, request csrng arb to reduce power |
| Sha3Process = 9'b010111111, // sha3 mode, pulse the sha3 process input |
| Sha3Valid = 9'b101110001, // sha3 mode, wait for sha3 valid indication |
| Sha3Done = 9'b110011000, // sha3 mode, capture sha3 result, pulse done input |
| Sha3Quiesce = 9'b111001101, // sha3 mode, goto alert state or continuous check mode |
| AlertState = 9'b111111011, // if some alert condition occurs, pulse an alert indication |
| AlertHang = 9'b101011100, // after pulsing alert signal, hang here until sw handles |
| Error = 9'b100111101 // illegal state reached and hang |
| } state_e; |
| |
| endpackage |
