Subversion Repositories xge_mac

//////////////////////////////////////////////////////////////////////

////                                                              ////

////  File name "sc_cpu_if.h"                                     ////

////                                                              ////

////  This file is part of the "10GE MAC" project                 ////

////  http://www.opencores.org/cores/xge_mac/                     ////

////                                                              ////

////  Author(s):                                                  ////

////      - A. Tanguay (antanguay@opencores.org)                  ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

////                                                              ////

//// Copyright (C) 2008 AUTHORS. All rights reserved.             ////

////                                                              ////

//// This source file may be used and distributed without         ////

//// restriction provided that this copyright statement is not    ////

//// removed from the file and that any derivative work contains  ////

//// the original copyright notice and the associated disclaimer. ////

////                                                              ////

//// This source file is free software; you can redistribute it   ////

//// and/or modify it under the terms of the GNU Lesser General   ////

//// Public License as published by the Free Software Foundation; ////

//// either version 2.1 of the License, or (at your option) any   ////

//// later version.                                               ////

////                                                              ////

//// This source is distributed in the hope that it will be       ////

//// useful, but WITHOUT ANY WARRANTY; without even the implied   ////

//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR      ////

//// PURPOSE.  See the GNU Lesser General Public License for more ////

//// details.                                                     ////

////                                                              ////

//// You should have received a copy of the GNU Lesser General    ////

//// Public License along with this source; if not, download it   ////

//// from http://www.opencores.org/lgpl.shtml                     ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

#include <stdio.h>

#include <iostream>

#include <sys/times.h>

#include <sys/stat.h>

#include "systemc.h"

#include "sc_cpu_if.h"

void cpu_if::init() {

};

void cpu_if::connect_scoreboard(scoreboard *sbptr, scoreboard::sbSourceId sid) {

    sb = sbptr;

    sb_id = sid;

}

void cpu_if::set_param(cpu_if::paramId param, int value) {

    switch (param) {

      case TX_ENABLE:

          writebits(cpu_if::CPUREG_CONFIG0, 0, 0, value);

          break;

    }

};

void cpu_if::set_interrupt(cpu_if::intId intr) {

    writebits(cpu_if::CPUREG_INT_PENDING, intr, intr, 1);

};

void cpu_if::set_interrupt_mask(cpu_if::intId intr, bool value) {

    writebits(cpu_if::CPUREG_INT_MASK, intr, intr, value);

};

void cpu_if::enable_all_interrupts(void) {

    write(cpu_if::CPUREG_INT_MASK, 0xffffffff);

};

uint cpu_if::read(uint addr) {

    uint data;

    //--

    // Wait for bus to be free, lock it, start transaction

    bus_lock.lock();

    bus_addr = addr;

    bus_write = false;

    bus_start.notify();

    //--

    // Wait for transaction to complete

    while (bus_done.trywait()) {

        wait(10, SC_NS);

    };

    //--

    // Get the data, free the bus

    data = bus_data;

    cout << hex << "READ ADDR 0x" << addr << ": 0x" << data << dec << endl;

    bus_lock.unlock();

    return data;

};

void cpu_if::write(uint addr, uint data) {

    //--

    // Wait for bus to be free, lock it, start transaction

    bus_lock.lock();

    bus_addr = addr;

    bus_data = data;

    bus_write = true;

    bus_start.notify();

    //--

    // Wait for transaction to complete

    while (bus_done.trywait()) {

        wait(10, SC_NS);

    };

    //--

    // Free the bus

    cout << hex << "WRITE ADDR 0x" << addr << ": 0x" << data << dec << endl;

    bus_lock.unlock();

};

void cpu_if::writebits(uint addr, uint hbit, uint lbit, uint value) {

    uint data;

    uint mask;

    mask = ~((0xffffffff << lbit) & (0xffffffff >> (31-lbit)));

    data = mask & read(addr);

    data = data | ((value << lbit) & ~mask);

    write(addr, data);

};

void cpu_if::transactor() {

    while (true) {

        // Wait for a transaction

        wait(bus_start);

        if (!bus_write) {

            //---

            // Read access

            // Start of access

            wb_adr_i = bus_addr;

            wb_dat_i = 0;

            wb_cyc_i = 1;

            wb_stb_i = 1;

            wb_we_i = 0;

            // Wait for ack

            while (wb_ack_o != 1) {

                wait();

            }

            // Capture data

            bus_data = wb_dat_o;

            wb_adr_i = 0;

            wb_dat_i = 0;

            wb_cyc_i = 0;

            wb_stb_i = 0;

        }

        else {

            //---

            // Write access

            // Start of access

            wb_adr_i = bus_addr;

            wb_dat_i = bus_data;

            wb_cyc_i = 1;

            wb_stb_i = 1;

            wb_we_i = 1;

            // Wait for ack

            while (wb_ack_o != 1) {

                wait();

            }

            // End cycle

            wb_adr_i = 0;

            wb_dat_i = 0;

            wb_cyc_i = 0;

            wb_stb_i = 0;

            wb_we_i = 0;

        }

        bus_done.post();

    }

};

void cpu_if::monitor() {

    uint data;

    wait();

    while (true) {

        if (wb_int_o) {

            //---

            // Read interrupt register when interrupt signal is asserted

            data = read(cpu_if::CPUREG_INT_PENDING);

            cout << "READ INTERRUPTS: 0x" << hex << data << dec << endl;

            //---

            // Notify scoreboard

            if ((data >> cpu_if::INT_CRC_ERROR) & 0x1) {

                sb->notify_status(sb_id, scoreboard::CRC_ERROR);

            }

            if ((data >> cpu_if::INT_FRAGMENT_ERROR) & 0x1) {

               sb->notify_status(sb_id, scoreboard::FRAGMENT_ERROR);

            }

            if ((data >> cpu_if::INT_LOCAL_FAULT) & 0x1) {

                data = read(cpu_if::CPUREG_INT_STATUS);

                if ((data >> cpu_if::INT_LOCAL_FAULT) & 0x1) {

                    sb->notify_status(sb_id, scoreboard::LOCAL_FAULT);

                }

            }

            if ((data >> cpu_if::INT_REMOTE_FAULT) & 0x1) {

                data = read(cpu_if::CPUREG_INT_STATUS);

                if ((data >> cpu_if::INT_REMOTE_FAULT) & 0x1) {

                    sb->notify_status(sb_id, scoreboard::REMOTE_FAULT);

                }

            }

            if ((data >> cpu_if::INT_RXD_FIFO_OVFLOW) & 0x1) {

                sb->notify_status(sb_id, scoreboard::RXD_FIFO_OVFLOW);

            }

            if ((data >> cpu_if::INT_RXD_FIFO_UDFLOW) & 0x1) {

                sb->notify_status(sb_id, scoreboard::RXD_FIFO_UDFLOW);

            }

            if ((data >> cpu_if::INT_TXD_FIFO_OVFLOW) & 0x1) {

                sb->notify_status(sb_id, scoreboard::TXD_FIFO_OVFLOW);

            }

            if ((data >> cpu_if::INT_TXD_FIFO_UDFLOW) & 0x1) {

                sb->notify_status(sb_id, scoreboard::TXD_FIFO_UDFLOW);

            }

            if ((data >> cpu_if::INT_PAUSE_FRAME) & 0x1) {

                sb->notify_status(sb_id, scoreboard::RX_GOOD_PAUSE_FRAME);

            }

        }

        wait();

    }

};