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/**

 * @file

 * @copyright  Copyright 2016 GNSS Sensor Ltd. All right reserved.

 * @author     Sergey Khabarov - sergeykhbr@gmail.com

 * @brief      Multi-port CPU Integer Registers memory.

 */

#include "regibank.h"

namespace debugger {

RegIntBank::RegIntBank(sc_module_name name_) : sc_module(name_) {

    SC_METHOD(comb);

    sensitive << i_nrst;

    sensitive << i_radr1;

    sensitive << i_radr2;

    sensitive << i_wena;

    sensitive << i_wdata;

    sensitive << i_waddr;

    sensitive << i_dport_ena;

    sensitive << i_dport_write;

    sensitive << i_dport_addr;

    sensitive << i_dport_wdata;

    sensitive << r.update;

    SC_METHOD(registers);

    sensitive << i_clk.pos();

};

void RegIntBank::generateVCD(sc_trace_file *i_vcd, sc_trace_file *o_vcd) {

    if (o_vcd) {

        sc_trace(o_vcd, i_wena, "/top/proc0/regs/i_wena");

        sc_trace(o_vcd, i_waddr, "/top/proc0/regs/i_waddr");

        sc_trace(o_vcd, i_wdata, "/top/proc0/regs/i_wdata");

        sc_trace(o_vcd, r.mem[5], "/top/proc0/regs/r4");

        sc_trace(o_vcd, o_rdata1, "/top/proc0/regs/o_rdata1");

        sc_trace(o_vcd, o_rdata2, "/top/proc0/regs/o_rdata2");

        sc_trace(o_vcd, o_dport_rdata, "/top/proc0/regs/o_dport_rdata");

    }

}

void RegIntBank::comb() {

    v = r;

    /** Debug port has higher priority. Collision must be controlled by SW */

    if (i_dport_ena.read() && i_dport_write.read()) {

        if (i_dport_addr.read() != 0) {

            v.mem[i_dport_addr.read()] = i_dport_wdata;

        }

    } else if (i_wena.read()) {

        if (i_waddr.read() != 0) {

            v.mem[i_waddr.read()] = i_wdata;

        }

    }

    v.update = !r.update.read();

    if (!i_nrst.read()) {

        v.mem[0] = 0;

        for (int i = 1; i < Reg_Total; i++) {

            v.mem[i] = 0xfeedface;

        }

        v.update = 0;

    }

    o_rdata1 = r.mem[i_radr1.read()];

    o_rdata2 = r.mem[i_radr2.read()];

    o_dport_rdata = r.mem[i_dport_addr.read()];

    o_ra = r.mem[Reg_ra];

}

void RegIntBank::registers() {

    r = v;

}

}  // namespace debugger