////
   Copyright 2022 Thales DIS design services SAS
   Licensed under the Solderpad Hardware Licence, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   SPDX-License-Identifier: Apache-2.0 WITH SHL-2.0
   You may obtain a copy of the License at https://solderpad.org/licenses/

   Original Author: Jean-Roch COULON - Thales
////

[[subsystem]]
Subsystem
---------

[[global-functionality]]
Global functionality
~~~~~~~~~~~~~~~~~~~~

The CVA6 is a subsystem composed of the modules and protocol interfaces
as illustrated The processor is a Harvard-based modern architecture.
Instructions are issued in-order through the DECODE stage and executed
out-of-order but committed in-order. The processor is Single issue, that
means that at maximum one instruction per cycle can be issued to the
EXECUTE stage.

The CVA6 implements a 6-stage pipeline composed of PC Generation,
Instruction Fetch, Instruction Decode, Issue stage, Execute stage and
Commit stage. At least 6 cycles are needed to execute one instruction.

[[connection-with-other-sub-systems]]
Connection with other sub-systems
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The submodule is connected to :

* NOC interconnect provides memory content
* COPROCESSOR connects through CV-X-IF coprocessor interface protocol
* TRACER provides support for verification
* TRAP provides traps inputs

[[parameter-configuration]]
Parameter configuration
~~~~~~~~~~~~~~~~~~~~~~~

include::parameters.adoc[]

[[io-ports]]
IO ports
~~~~~~~~

include::port_cva6.adoc[]