1/*
2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
3 * Copyright (c) 2009-2010 Advanced Micro Devices, Inc.
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
30#include "cpu/testers/directedtest/SeriesRequestGenerator.hh"
31
32#include "base/random.hh"
33#include "base/trace.hh"
34#include "cpu/testers/directedtest/DirectedGenerator.hh"
35#include "cpu/testers/directedtest/RubyDirectedTester.hh"
36#include "debug/DirectedTest.hh"
37
38SeriesRequestGenerator::SeriesRequestGenerator(const Params *p)
39    : DirectedGenerator(p),
40      m_addr_increment_size(p->addr_increment_size),
41      m_percent_writes(p->percent_writes)
42{
43    m_status = SeriesRequestGeneratorStatus_Thinking;
44    m_active_node = 0;
45    m_address = 0x0;
46}
47
48SeriesRequestGenerator::~SeriesRequestGenerator()
49{
50}
51
52bool
53SeriesRequestGenerator::initiate()
54{
55    DPRINTF(DirectedTest, "initiating request\n");
56    assert(m_status == SeriesRequestGeneratorStatus_Thinking);
57
58    MasterPort* port = m_directed_tester->getCpuPort(m_active_node);
59
60    Request::Flags flags;
61
62    // For simplicity, requests are assumed to be 1 byte-sized
63    RequestPtr req = std::make_shared<Request>(m_address, 1, flags, masterId);
64
65    Packet::Command cmd;
66    bool do_write = (random_mt.random(0, 100) < m_percent_writes);
67    if (do_write) {
68        cmd = MemCmd::WriteReq;
69    } else {
70        cmd = MemCmd::ReadReq;
71    }
72
73    PacketPtr pkt = new Packet(req, cmd);
74    pkt->allocate();
75
76    if (port->sendTimingReq(pkt)) {
77        DPRINTF(DirectedTest, "initiating request - successful\n");
78        m_status = SeriesRequestGeneratorStatus_Request_Pending;
79        return true;
80    } else {
81        // If the packet did not issue, must delete
82        // Note: No need to delete the data, the packet destructor
83        // will delete it
84        delete pkt;
85
86        DPRINTF(DirectedTest, "failed to initiate request - sequencer not ready\n");
87        return false;
88    }
89}
90
91void
92SeriesRequestGenerator::performCallback(uint32_t proc, Addr address)
93{
94    assert(m_active_node == proc);
95    assert(m_address == address);
96    assert(m_status == SeriesRequestGeneratorStatus_Request_Pending);
97
98    m_status = SeriesRequestGeneratorStatus_Thinking;
99    m_active_node++;
100    if (m_active_node == m_num_cpus) {
101        //
102        // Cycle of requests completed, increment cycle completions and restart
103        // at cpu zero
104        //
105        m_directed_tester->incrementCycleCompletions();
106        m_address += m_addr_increment_size;
107        m_active_node = 0;
108    }
109}
110
111SeriesRequestGenerator *
112SeriesRequestGeneratorParams::create()
113{
114    return new SeriesRequestGenerator(this);
115}
116