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//
// Copyright 2025 Ettus Research, a National Instruments Brand
//
// SPDX-License-Identifier: LGPL-3.0-or-later
//
// Module: ctrlport_if_window
//
// Description:
//
// Copy requests from slave to master interface when s_ctrlport_req_addr is in
// address range specified by the parameters.
//
// Parameters:
//
// BASE_ADDRESS : Base address of the window.
// This will be the first address in the range.
// WINDOW_SIZE : Size of the address space for the window.
// Last address in range will be BASE_ADDRESS + WINDOW_SIZE - 1.
//
module ctrlport_if_window #(
int BASE_ADDRESS = 0,
int WINDOW_SIZE = 32
) (
ctrlport_if.slave s_ctrlport,
ctrlport_if.master m_ctrlport
);
always_comb begin
// Mask write and read flag
automatic logic address_in_range = (s_ctrlport.req.addr >= BASE_ADDRESS) &&
(s_ctrlport.req.addr < BASE_ADDRESS + WINDOW_SIZE);
// initialize master request by slave request
m_ctrlport.req = s_ctrlport.req;
// overwrite write and read flag with in range flag
m_ctrlport.req.wr = s_ctrlport.req.wr && address_in_range;
m_ctrlport.req.rd = s_ctrlport.req.rd && address_in_range;
// transfer reponse without change
s_ctrlport.resp = m_ctrlport.resp;
end
endmodule
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