aes_wrapper

Wrap the OpenTitan AES core with an AXI-Lite CSR bridge and a Key Manager key CSR block.

axi_lite_to_tlul bridges the 32-bit AXI-Lite CSR interface onto the AES TL-UL port. The AXI4-Lite key interface terminates in the generated aes_wrapper_key_reg block, whose two key shares and valid bit drive the AES keymgr_key_i sideload port. EDN supplies entropy for PRNG reseeding. Two alerts leave the block: index 0 is recoverable (recov_ctrl_update_err) and index 1 is fatal (fatal_fault). The shadow-register reset is tied to rst_ni, lifecycle escalation is tied off, and the EDN clock is clk_i. bus_err_o sticks on a TL-UL error response until bus_err_clr_i. idle_o reports AES idle.

Ports

Table 1. Ports
Name	Direction	Type	Description
`clk_i`	input	`logic`	System clock.
`rst_ni`	input	`logic`	Active-low reset; also drives the AES shadow-register reset.
`aes_axil_req_i`	input	`sep_pkg::sep_32_32_axil_req_t`	AES CSR request, bridged to the AES TL-UL port.
`aes_axil_resp_o`	output	`sep_pkg::sep_32_32_axil_resp_t`	AES CSR response from the TL-UL bridge.
`aes_key_axil_req_i`	input	`sep_pkg::sep_32_32_axil_req_t`	Key Manager private-bus request to the AES key CSR block.
`aes_key_axil_resp_o`	output	`sep_pkg::sep_32_32_axil_resp_t`	Response from the AES key CSR block to the Key Manager.
`edn_req_o`	output	`edn_pkg::edn_req_t`	EDN request for PRNG reseeding entropy.
`edn_rsp_i`	input	`edn_pkg::edn_rsp_t`	EDN response for PRNG reseeding entropy.
`alert_rx_i`	input	`prim_alert_pkg::alert_rx_t [1:0]`	Alert receiver handshakes; index 0 recoverable (recov_ctrl_update_err), index 1 fatal (fatal_fault).
`alert_tx_o`	output	`prim_alert_pkg::alert_tx_t [1:0]`	Differential alert senders; index 0 recoverable (recov_ctrl_update_err), index 1 fatal (fatal_fault).
`bus_err_o`	output	`logic`	Set by a TL-UL error response on the CSR bridge; sticky until bus_err_clr_i.
`bus_err_clr_i`	input	`logic`	Clears bus_err_o; a fault in the same cycle still sets it.
`idle_o`	output	`logic`	High when the AES core reports idle (mubi4 strictly true).