87 lines
3.4 KiB
C++
87 lines
3.4 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2017, MINRES Technologies GmbH
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Contributors:
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// eyck@minres.com - initial implementation
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//
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//
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////////////////////////////////////////////////////////////////////////////////
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#ifndef _GPIO_H_
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#define _GPIO_H_
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#include "scc/tlm_target.h"
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#include "tlm/scc/signal_target_mixin.h"
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#include "tlm/scc/signal_initiator_mixin.h"
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#include <tlm/scc/tlm_signal.h>
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namespace sysc {
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class gpio_regs;
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class WsHandler;
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class gpio : public sc_core::sc_module, public scc::tlm_target<> {
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public:
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SC_HAS_PROCESS(gpio);
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sc_core::sc_in<sc_core::sc_time> clk_i;
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sc_core::sc_in<bool> rst_i;
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// sc_core::sc_inout_rv<32> pins_io;
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sc_core::sc_vector<tlm::scc::tlm_signal_bool_out> pins_o;
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sc_core::sc_vector<tlm::scc::tlm_signal_bool_in> pins_i;
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sc_core::sc_vector<tlm::scc::tlm_signal_bool_opt_out> iof0_o;
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sc_core::sc_vector<tlm::scc::tlm_signal_bool_opt_out> iof1_o;
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sc_core::sc_vector<tlm::scc::tlm_signal_bool_opt_in> iof0_i;
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sc_core::sc_vector<tlm::scc::tlm_signal_bool_opt_in> iof1_i;
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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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protected:
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void clock_cb();
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void reset_cb();
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void update_pins(uint32_t changed_bits);
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void pin_input(unsigned int tag, tlm::scc::tlm_signal_gp<>& gp, sc_core::sc_time& delay);
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void forward_pin_input(unsigned int tag, tlm::scc::tlm_signal_gp<>& gp);
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void iof_input(unsigned int tag, unsigned iof_idx, tlm::scc::tlm_signal_gp<>& gp, sc_core::sc_time& delay);
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sc_core::sc_time clk;
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std::array<bool, 32> last_iof0, last_iof1;
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std::unique_ptr<gpio_regs> regs;
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std::shared_ptr<sysc::WsHandler> handler;
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private:
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tlm::tlm_phase write_output(tlm::scc::tlm_signal_gp<>& gp, size_t i, bool val);
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};
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} /* namespace sysc */
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#endif /* _GPIO_H_ */
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