Entity: entropy_src_main_sm

Diagram

int StateWidth clk_i rst_ni enable_i ht_done_pulse_i ht_fail_pulse_i alert_thresh_fail_i sfifo_esfinal_full_i bypass_mode_i main_stage_rdy_i bypass_stage_rdy_i sha3_state_vld_i cs_aes_halt_ack_i rst_alert_cntr_o rst_bypass_mode_o main_stage_pop_o bypass_stage_pop_o sha3_start_o sha3_process_o sha3_done_o cs_aes_halt_req_o main_sm_alert_o main_sm_idle_o [StateWidth-1:0] main_sm_state_o main_sm_err_o

Description

Copyright lowRISC contributors. Licensed under the Apache License, Version 2.0, see LICENSE for details. SPDX-License-Identifier: Apache-2.0

Description: entropy_src main state machine module

determines when new entropy is ready to be forwarded

Generics

Generic name Type Value Description
StateWidth int 8

Ports

Port name Direction Type Description
clk_i input
rst_ni input
enable_i input
ht_done_pulse_i input
ht_fail_pulse_i input
alert_thresh_fail_i input
sfifo_esfinal_full_i input
rst_alert_cntr_o output
bypass_mode_i input
rst_bypass_mode_o output
main_stage_rdy_i input
bypass_stage_rdy_i input
sha3_state_vld_i input
main_stage_pop_o output
bypass_stage_pop_o output
sha3_start_o output
sha3_process_o output
sha3_done_o output
cs_aes_halt_req_o output
cs_aes_halt_ack_i input
main_sm_alert_o output
main_sm_idle_o output
main_sm_state_o output [StateWidth-1:0]
main_sm_err_o output

Signals

Name Type Description
state_d state_e
state_q state_e
state_raw_q logic [StateWidth-1:0]

Constants

Name Type Value Description
StateWidth int 8

Types

Name Type Description
state_e enum logic [StateWidth-1:0] {
Idle = 8'b11000110,
BootHTRunning = 8'b10111001,
BootPostHTChk = 8'b10110110,
StartupHTStart = 8'b10000101,
StartupPhase1 = 8'b01110100,
StartupPass1 = 8'b00101110,
StartupFail1 = 8'b01000011,
ContHTStart = 8'b01011110,
ContHTRunning = 8'b11110011,
Sha3Prep = 8'b10011111,
Sha3Process = 8'b11101000,
Sha3Valid = 8'b10001010,
Sha3Done = 8'b00010000,
Sha3Quiesce = 8'b01101101,
AlertState = 8'b01011001,
Error = 8'b00100001 }		 Encoding generated with: $ ./util/design/sparse-fsm-encode.py -d 3 -m 16 -n 8 \ -s 4129751849 --language=sv
Hamming distance histogram:
0: -- 1: -- 2: -- 3:

Processes

Type: always_comb

Instantiations

Description
This primitive is used to place a size-only constraint on the
flops in order to prevent FSM state encoding optimizations.