HIFIVE1-VP/riscv.sc/incl/sysc/SiFive/gpio.h

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2017-11-27 00:14:41 +01:00
////////////////////////////////////////////////////////////////////////////////
// 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
//
//
////////////////////////////////////////////////////////////////////////////////
#ifndef _GPIO_H_
#define _GPIO_H_
#include "scc/tlm_target.h"
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#include "scc/ext_attribute.h"
#include <sysc/communication/sc_signal_rv_ports.h>
namespace sysc {
class gpio_regs;
class WsHandler;
class gpio : public sc_core::sc_module, public scc::tlm_target<> {
public:
SC_HAS_PROCESS(gpio);
sc_core::sc_in<sc_core::sc_time> clk_i;
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sc_core::sc_in<bool> rst_i;
sc_core::sc_inout_rv<32> pins_io;
gpio(sc_core::sc_module_name nm);
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virtual ~gpio() override; // need to keep it in source file because of fwd declaration of gpio_regs
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scc::ext_attribute<bool> write_to_ws;
protected:
void clock_cb();
void reset_cb();
void update_pins();
void pins_cb();
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void before_end_of_elaboration();
sc_core::sc_time clk;
std::unique_ptr<gpio_regs> regs;
std::shared_ptr<sysc::WsHandler> handler;
private:
void update_value_reg();
};
} /* namespace sysc */
#endif /* _GPIO_H_ */