1/*
2 * Copyright (c) 2008 Princeton University
3 * Copyright (c) 2016 Georgia Institute of Technology
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;
10 * redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution;
13 * neither the name of the copyright holders nor the names of its
14 * contributors may be used to endorse or promote products derived from
15 * this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * Authors: Niket Agarwal
30 *          Tushar Krishna
31 */
32
33
34#include "mem/ruby/network/garnet2.0/OutVcState.hh"
35
36#include "mem/ruby/system/RubySystem.hh"
37
38OutVcState::OutVcState(int id, GarnetNetwork *network_ptr)
39    : m_time(0)
40{
41    m_id = id;
42    m_vc_state = IDLE_;
43
44    if (network_ptr->get_vnet_type(id) == DATA_VNET_)
45        m_max_credit_count = network_ptr->getBuffersPerDataVC();
46    else
47        m_max_credit_count = network_ptr->getBuffersPerCtrlVC();
48
49    m_credit_count = m_max_credit_count;
50    assert(m_credit_count >= 1);
51}
52
53void
54OutVcState::increment_credit()
55{
56    m_credit_count++;
57    assert(m_credit_count <= m_max_credit_count);
58}
59
60void
61OutVcState::decrement_credit()
62{
63    m_credit_count--;
64    assert(m_credit_count >= 0);
65}
66