| /* |
| * Copyright (c) 2008 Princeton University |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer; |
| * 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; |
| * neither the name of the copyright holders 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 |
| * OWNER 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. |
| * |
| * Authors: Niket Agarwal |
| */ |
| |
| #include "mem/ruby/network/garnet/fixed-pipeline/VirtualChannel_d.hh" |
| |
| VirtualChannel_d::VirtualChannel_d(int id) |
| { |
| m_id = id; |
| m_input_buffer = new flitBuffer_d(); |
| m_vc_state.first = IDLE_; |
| m_vc_state.second = g_eventQueue_ptr->getTime(); |
| m_enqueue_time = INFINITE_; |
| } |
| |
| VirtualChannel_d::~VirtualChannel_d() |
| { |
| delete m_input_buffer; |
| } |
| |
| void |
| VirtualChannel_d::set_outport(int outport) |
| { |
| route = outport; |
| } |
| |
| void |
| VirtualChannel_d::grant_vc(int out_vc) |
| { |
| m_output_vc = out_vc; |
| m_vc_state.first = ACTIVE_; |
| m_vc_state.second = g_eventQueue_ptr->getTime() + 1; |
| flit_d *t_flit = m_input_buffer->peekTopFlit(); |
| t_flit->advance_stage(SA_); |
| } |
| |
| bool |
| VirtualChannel_d::need_stage(VC_state_type state, flit_stage stage) |
| { |
| if ((m_vc_state.first == state) && |
| (g_eventQueue_ptr->getTime() >= m_vc_state.second)) { |
| if (m_input_buffer->isReady()) { |
| flit_d *t_flit = m_input_buffer->peekTopFlit(); |
| return(t_flit->is_stage(stage)) ; |
| } |
| } |
| return false; |
| |
| } |
| |
| bool |
| VirtualChannel_d::need_stage_nextcycle(VC_state_type state, flit_stage stage) |
| { |
| if ((m_vc_state.first == state) && |
| ((g_eventQueue_ptr->getTime()+1) >= m_vc_state.second)) { |
| if (m_input_buffer->isReadyForNext()) { |
| flit_d *t_flit = m_input_buffer->peekTopFlit(); |
| return(t_flit->is_next_stage(stage)) ; |
| } |
| } |
| return false; |
| } |