Entity: keymgr_reseed_ctrl
- File: keymgr_reseed_ctrl.sv
Diagram
Description
Copyright lowRISC contributors. Licensed under the Apache License, Version 2.0, see LICENSE for details. SPDX-License-Identifier: Apache-2.0
Key manager entropy reseed controls
Ports
| Port name | Direction | Type | Description |
|---|---|---|---|
| clk_i | input | ||
| rst_ni | input | ||
| clk_edn_i | input | ||
| rst_edn_ni | input | ||
| reseed_req_i | input | interface to keymgr_ctrl | |
| reseed_ack_o | output | ||
| reseed_interval_i | input | [15:0] | interface to software |
| edn_o | output | interface to edn | |
| edn_i | input | ||
| seed_en_o | output | interface to lfsr | |
| seed_o | output | [LfsrWidth-1:0] |
Signals
| Name | Type | Description |
|---|---|---|
| edn_cnt | logic [EdnCntWidth-1:0] | counter to track number of edn rounds |
| edn_txn_done | logic | |
| edn_done | logic | |
| edn_req | logic | |
| edn_ack | logic | |
| edn_data | logic [EdnWidth-1:0] | |
| unused_fips | logic |
Constants
| Name | Type | Value | Description |
|---|---|---|---|
| EdnRounds | int unsigned | LfsrWidth / EdnWidth | |
| EdnCntWidth | int unsigned | prim_util_pkg::vbits(EdnRounds) | |
| LastEdnRound | int unsigned | EdnRounds - 1 |
Processes
- unnamed: ( @(posedge clk_i or negedge rst_ni) )
Type: always_ff
- unnamed: ( @(posedge clk_edn_i) )
Type: always_ff
Description
capture the data on edn domain since the ack interface finishes before the source domain is able to see it
Instantiations
- u_reqack: prim_sync_reqack
Description
req/ack interface to edn