HIFIVE1-VP/platform/incl/sysc/SiFive/gpio.h

88 lines
3.5 KiB
C++

/*******************************************************************************
* Copyright (C) 2017, 2018 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
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************/
#ifndef _GPIO_H_
#define _GPIO_H_
#include "cci_configuration"
#include "scc/signal_initiator_mixin.h"
#include "scc/signal_target_mixin.h"
#include "scc/tlm_target.h"
#include <memory>
#include <tlm/tlm_signal.h>
namespace sysc {
class gpio_regs;
class WsHandler;
class gpio : public sc_core::sc_module, public scc::tlm_target<> {
public:
SC_HAS_PROCESS(gpio);// NOLINT
sc_core::sc_in<sc_core::sc_time> clk_i;
sc_core::sc_in<bool> rst_i;
// sc_core::sc_inout_rv<32> pins_io;
sc_core::sc_vector<scc::tlm_signal_logic_out> pins_o;
sc_core::sc_vector<scc::tlm_signal_logic_in> pins_i;
sc_core::sc_vector<scc::tlm_signal_bool_opt_out> iof0_o;
sc_core::sc_vector<scc::tlm_signal_bool_opt_out> iof1_o;
sc_core::sc_vector<scc::tlm_signal_bool_opt_in> iof0_i;
sc_core::sc_vector<scc::tlm_signal_bool_opt_in> iof1_i;
gpio(sc_core::sc_module_name nm);
virtual ~gpio() override; // need to keep it in source file because of fwd declaration of gpio_regs
cci::cci_param<bool> write_to_ws;
protected:
void clock_cb();
void reset_cb();
void update_pins(uint32_t changed_bits);
void before_end_of_elaboration() override;
void pin_input(unsigned int tag, tlm::tlm_signal_gp<sc_dt::sc_logic> &gp, sc_core::sc_time &delay);
void forward_pin_input(unsigned int tag, tlm::tlm_signal_gp<sc_dt::sc_logic> &gp);
void iof_input(unsigned int tag, unsigned iof_idx, tlm::tlm_signal_gp<> &gp, sc_core::sc_time &delay);
sc_core::sc_time clk;
std::array<bool, 32> last_iof0, last_iof1;
std::unique_ptr<gpio_regs> regs;
std::shared_ptr<sysc::WsHandler> handler;
private:
tlm::tlm_phase write_output(tlm::tlm_signal_gp<sc_dt::sc_logic> &gp, size_t i, sc_dt::sc_logic val);
};
} /* namespace sysc */
#endif /* _GPIO_H_ */