SeriesRequestGenerator.cc revision 7632:acf43d6bbc18 
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/DirectedGenerator.hh"
31#include "cpu/testers/directedtest/RubyDirectedTester.hh"
32#include "cpu/testers/directedtest/SeriesRequestGenerator.hh"
33
34SeriesRequestGenerator::SeriesRequestGenerator(const Params *p)
35    : DirectedGenerator(p)
36{
37    m_status = SeriesRequestGeneratorStatus_Thinking;
38    m_active_node = 0;
39    m_address = 0x0;
40    m_addr_increment_size = p->addr_increment_size;
41    m_issue_writes = p->issue_writes;
42}
43
44SeriesRequestGenerator::~SeriesRequestGenerator()
45{
46}
47
48bool
49SeriesRequestGenerator::initiate()
50{
51    DPRINTF(DirectedTest, "initiating request\n");
52    assert(m_status == SeriesRequestGeneratorStatus_Thinking);
53
54    RubyDirectedTester::CpuPort* port =
55        safe_cast<RubyDirectedTester::CpuPort*>(m_directed_tester->
56                                              getCpuPort(m_active_node));
57
58    Request::Flags flags;
59
60    // For simplicity, requests are assumed to be 1 byte-sized
61    Request *req = new Request(m_address, 1, flags);
62
63    Packet::Command cmd;
64    if (m_issue_writes) {
65        cmd = MemCmd::WriteReq;
66    } else {
67        cmd = MemCmd::ReadReq;
68    }
69    PacketPtr pkt = new Packet(req, cmd, m_active_node);
70    uint8_t* dummyData = new uint8_t;
71    *dummyData = 0;
72    pkt->dataDynamic(dummyData);
73
74    if (port->sendTiming(pkt)) {
75        DPRINTF(DirectedTest, "initiating request - successful\n");
76        m_status = SeriesRequestGeneratorStatus_Request_Pending;
77        return true;
78    } else {
79        // If the packet did not issue, must delete
80        // Note: No need to delete the data, the packet destructor
81        // will delete it
82        delete pkt->req;
83        delete pkt;
84
85        DPRINTF(DirectedTest, "failed to initiate request - sequencer not ready\n");
86        return false;
87    }
88}
89
90void
91SeriesRequestGenerator::performCallback(uint proc, Addr address)
92{
93    assert(m_active_node == proc);
94    assert(m_address == address);
95    assert(m_status == SeriesRequestGeneratorStatus_Request_Pending);
96
97    m_status = SeriesRequestGeneratorStatus_Thinking;
98    m_active_node++;
99    if (m_active_node == m_num_cpus) {
100        //
101        // Cycle of requests completed, increment cycle completions and restart
102        // at cpu zero
103        //
104        m_directed_tester->incrementCycleCompletions();
105        m_address += m_addr_increment_size;
106        m_active_node = 0;
107    }
108}
109
110SeriesRequestGenerator *
111SeriesRequestGeneratorParams::create()
112{
113    return new SeriesRequestGenerator(this);
114}
115