HIFIVE1-VP/platform/src/sysc/aon.cpp

79 lines
2.6 KiB
C++

/*******************************************************************************
* Copyright (C) 2017, MINRES Technologies GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Contributors:
* eyck@minres.com - initial implementation
*
*
*******************************************************************************/
#include "sysc/SiFive/aon.h"
#include "scc/utilities.h"
#include "sysc/SiFive/gen/aon_regs.h"
namespace sysc {
aon::aon(sc_core::sc_module_name nm)
: sc_core::sc_module(nm)
, tlm_target<>(clk)
, NAMED(clk_i)
, NAMED(erst_n_i)
, NAMED(lfclkc_o)
, NAMED(rst_o)
, NAMEDD(regs, aon_regs) {
regs->registerResources(*this);
SC_METHOD(clock_cb);
sensitive << clk_i;
SC_METHOD(reset_cb);
sensitive << erst_n_i;
}
void aon::start_of_simulation() { rst_o = true; }
void aon::clock_cb() { this->clk = clk_i.read(); }
aon::~aon() {} // NOLINT
void aon::reset_cb() {
if (!erst_n_i.read()) {
regs->reset_start();
rst_o = true;
} else {
regs->reset_stop();
rst_o = false;
}
lfclkc_o.write(sc_core::sc_time(1 / 32768., sc_core::SC_SEC));
}
void aon::reset_internal_cb() {}
} /* namespace sysc */