Check.cc revision 11800 
1/*
2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
3 * Copyright (c) 2009 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/rubytest/Check.hh"
31
32#include "base/random.hh"
33#include "base/trace.hh"
34#include "debug/RubyTest.hh"
35#include "mem/ruby/common/SubBlock.hh"
36
37typedef RubyTester::SenderState SenderState;
38
39Check::Check(Addr address, Addr pc, int _num_writers, int _num_readers,
40             RubyTester* _tester)
41    : m_num_writers(_num_writers), m_num_readers(_num_readers),
42      m_tester_ptr(_tester)
43{
44    m_status = TesterStatus_Idle;
45
46    pickValue();
47    pickInitiatingNode();
48    changeAddress(address);
49    m_pc = pc;
50    m_access_mode = RubyAccessMode(random_mt.random(0,
51                                                    RubyAccessMode_NUM - 1));
52    m_store_count = 0;
53}
54
55void
56Check::initiate()
57{
58    DPRINTF(RubyTest, "initiating\n");
59    debugPrint();
60
61    // currently no protocols support prefetches
62    if (false && (random_mt.random(0, 0xf) == 0)) {
63        initiatePrefetch(); // Prefetch from random processor
64    }
65
66        if (m_tester_ptr->getCheckFlush() && (random_mt.random(0, 0xff) == 0)) {
67        initiateFlush(); // issue a Flush request from random processor
68    }
69
70    if (m_status == TesterStatus_Idle) {
71        initiateAction();
72    } else if (m_status == TesterStatus_Ready) {
73        initiateCheck();
74    } else {
75        // Pending - do nothing
76        DPRINTF(RubyTest,
77                "initiating action/check - failed: action/check is pending\n");
78    }
79}
80
81void
82Check::initiatePrefetch()
83{
84    DPRINTF(RubyTest, "initiating prefetch\n");
85
86    int index = random_mt.random(0, m_num_readers - 1);
87    MasterPort* port = m_tester_ptr->getReadableCpuPort(index);
88
89    Request::Flags flags;
90    flags.set(Request::PREFETCH);
91
92    Packet::Command cmd;
93
94    // 1 in 8 chance this will be an exclusive prefetch
95    if (random_mt.random(0, 0x7) != 0) {
96        cmd = MemCmd::ReadReq;
97
98        // if necessary, make the request an instruction fetch
99        if (m_tester_ptr->isInstOnlyCpuPort(index) ||
100            (m_tester_ptr->isInstDataCpuPort(index) &&
101             (random_mt.random(0, 0x1)))) {
102            flags.set(Request::INST_FETCH);
103        }
104    } else {
105        cmd = MemCmd::WriteReq;
106        flags.set(Request::PF_EXCLUSIVE);
107    }
108
109    // Prefetches are assumed to be 0 sized
110    Request *req = new Request(m_address, 0, flags,
111            m_tester_ptr->masterId(), curTick(), m_pc);
112    req->setContext(index);
113
114    PacketPtr pkt = new Packet(req, cmd);
115    // despite the oddity of the 0 size (questionable if this should
116    // even be allowed), a prefetch is still a read and as such needs
117    // a place to store the result
118    uint8_t *data = new uint8_t[1];
119    pkt->dataDynamic(data);
120
121    // push the subblock onto the sender state.  The sequencer will
122    // update the subblock on the return
123    pkt->senderState = new SenderState(m_address, req->getSize());
124
125    if (port->sendTimingReq(pkt)) {
126        DPRINTF(RubyTest, "successfully initiated prefetch.\n");
127    } else {
128        // If the packet did not issue, must delete
129        delete pkt->senderState;
130        delete pkt->req;
131        delete pkt;
132
133        DPRINTF(RubyTest,
134                "prefetch initiation failed because Port was busy.\n");
135    }
136}
137
138void
139Check::initiateFlush()
140{
141
142    DPRINTF(RubyTest, "initiating Flush\n");
143
144    int index = random_mt.random(0, m_num_writers - 1);
145    MasterPort* port = m_tester_ptr->getWritableCpuPort(index);
146
147    Request::Flags flags;
148
149    Request *req = new Request(m_address, CHECK_SIZE, flags,
150            m_tester_ptr->masterId(), curTick(), m_pc);
151
152    Packet::Command cmd;
153
154    cmd = MemCmd::FlushReq;
155
156    PacketPtr pkt = new Packet(req, cmd);
157
158    // push the subblock onto the sender state.  The sequencer will
159    // update the subblock on the return
160    pkt->senderState = new SenderState(m_address, req->getSize());
161
162    if (port->sendTimingReq(pkt)) {
163        DPRINTF(RubyTest, "initiating Flush - successful\n");
164    }
165}
166
167void
168Check::initiateAction()
169{
170    DPRINTF(RubyTest, "initiating Action\n");
171    assert(m_status == TesterStatus_Idle);
172
173    int index = random_mt.random(0, m_num_writers - 1);
174    MasterPort* port = m_tester_ptr->getWritableCpuPort(index);
175
176    Request::Flags flags;
177
178    // Create the particular address for the next byte to be written
179    Addr writeAddr(m_address + m_store_count);
180
181    // Stores are assumed to be 1 byte-sized
182    Request *req = new Request(writeAddr, 1, flags, m_tester_ptr->masterId(),
183                               curTick(), m_pc);
184
185    req->setContext(index);
186    Packet::Command cmd;
187
188    // 1 out of 8 chance, issue an atomic rather than a write
189    // if ((random() & 0x7) == 0) {
190    //     cmd = MemCmd::SwapReq;
191    // } else {
192    cmd = MemCmd::WriteReq;
193    // }
194
195    PacketPtr pkt = new Packet(req, cmd);
196    uint8_t *writeData = new uint8_t[1];
197    *writeData = m_value + m_store_count;
198    pkt->dataDynamic(writeData);
199
200    DPRINTF(RubyTest, "Seq write: index %d data 0x%x check 0x%x\n", index,
201            *(pkt->getConstPtr<uint8_t>()), *writeData);
202
203    // push the subblock onto the sender state.  The sequencer will
204    // update the subblock on the return
205    pkt->senderState = new SenderState(writeAddr, req->getSize());
206
207    if (port->sendTimingReq(pkt)) {
208        DPRINTF(RubyTest, "initiating action - successful\n");
209        DPRINTF(RubyTest, "status before action update: %s\n",
210                (TesterStatus_to_string(m_status)).c_str());
211        m_status = TesterStatus_Action_Pending;
212        DPRINTF(RubyTest, "Check %s, State=Action_Pending\n", m_address);
213    } else {
214        // If the packet did not issue, must delete
215        // Note: No need to delete the data, the packet destructor
216        // will delete it
217        delete pkt->senderState;
218        delete pkt->req;
219        delete pkt;
220
221        DPRINTF(RubyTest, "failed to initiate action - sequencer not ready\n");
222    }
223
224    DPRINTF(RubyTest, "status after action update: %s\n",
225            (TesterStatus_to_string(m_status)).c_str());
226}
227
228void
229Check::initiateCheck()
230{
231    DPRINTF(RubyTest, "Initiating Check\n");
232    assert(m_status == TesterStatus_Ready);
233
234    int index = random_mt.random(0, m_num_readers - 1);
235    MasterPort* port = m_tester_ptr->getReadableCpuPort(index);
236
237    Request::Flags flags;
238
239    // If necessary, make the request an instruction fetch
240    if (m_tester_ptr->isInstOnlyCpuPort(index) ||
241        (m_tester_ptr->isInstDataCpuPort(index) &&
242         (random_mt.random(0, 0x1)))) {
243        flags.set(Request::INST_FETCH);
244    }
245
246    // Checks are sized depending on the number of bytes written
247    Request *req = new Request(m_address, CHECK_SIZE, flags,
248                               m_tester_ptr->masterId(), curTick(), m_pc);
249
250    req->setContext(index);
251    PacketPtr pkt = new Packet(req, MemCmd::ReadReq);
252    uint8_t *dataArray = new uint8_t[CHECK_SIZE];
253    pkt->dataDynamic(dataArray);
254
255    DPRINTF(RubyTest, "Seq read: index %d\n", index);
256
257    // push the subblock onto the sender state.  The sequencer will
258    // update the subblock on the return
259    pkt->senderState = new SenderState(m_address, req->getSize());
260
261    if (port->sendTimingReq(pkt)) {
262        DPRINTF(RubyTest, "initiating check - successful\n");
263        DPRINTF(RubyTest, "status before check update: %s\n",
264                TesterStatus_to_string(m_status).c_str());
265        m_status = TesterStatus_Check_Pending;
266        DPRINTF(RubyTest, "Check %s, State=Check_Pending\n", m_address);
267    } else {
268        // If the packet did not issue, must delete
269        // Note: No need to delete the data, the packet destructor
270        // will delete it
271        delete pkt->senderState;
272        delete pkt->req;
273        delete pkt;
274
275        DPRINTF(RubyTest, "failed to initiate check - cpu port not ready\n");
276    }
277
278    DPRINTF(RubyTest, "status after check update: %s\n",
279            TesterStatus_to_string(m_status).c_str());
280}
281
282void
283Check::performCallback(NodeID proc, SubBlock* data, Cycles curTime)
284{
285    Addr address = data->getAddress();
286
287    // This isn't exactly right since we now have multi-byte checks
288    //  assert(getAddress() == address);
289
290    assert(makeLineAddress(m_address) == makeLineAddress(address));
291    assert(data != NULL);
292
293    DPRINTF(RubyTest, "RubyTester Callback\n");
294    debugPrint();
295
296    if (m_status == TesterStatus_Action_Pending) {
297        DPRINTF(RubyTest, "Action callback write value: %d, currently %d\n",
298                (m_value + m_store_count), data->getByte(0));
299        // Perform store one byte at a time
300        data->setByte(0, (m_value + m_store_count));
301        m_store_count++;
302        if (m_store_count == CHECK_SIZE) {
303            m_status = TesterStatus_Ready;
304            DPRINTF(RubyTest, "Check %s, State=Ready\n", m_address);
305        } else {
306            m_status = TesterStatus_Idle;
307            DPRINTF(RubyTest, "Check %s, State=Idle store_count: %d\n",
308                    m_address, m_store_count);
309        }
310        DPRINTF(RubyTest, "Action callback return data now %d\n",
311                data->getByte(0));
312    } else if (m_status == TesterStatus_Check_Pending) {
313        DPRINTF(RubyTest, "Check callback\n");
314        // Perform load/check
315        for (int byte_number=0; byte_number<CHECK_SIZE; byte_number++) {
316            if (uint8_t(m_value + byte_number) != data->getByte(byte_number)) {
317                panic("Action/check failure: proc: %d address: %s data: %s "
318                      "byte_number: %d m_value+byte_number: %d byte: %d %s"
319                      "Time: %d\n",
320                      proc, address, data, byte_number,
321                      (int)m_value + byte_number,
322                      (int)data->getByte(byte_number), *this, curTime);
323            }
324        }
325        DPRINTF(RubyTest, "Action/check success\n");
326        debugPrint();
327
328        // successful check complete, increment complete
329        m_tester_ptr->incrementCheckCompletions();
330
331        m_status = TesterStatus_Idle;
332        DPRINTF(RubyTest, "Check %s, State=Idle\n", m_address);
333        pickValue();
334
335    } else {
336        panic("Unexpected TesterStatus: %s proc: %d data: %s m_status: %s "
337              "time: %d\n", *this, proc, data, m_status, curTime);
338    }
339
340    DPRINTF(RubyTest, "proc: %d, Address: 0x%x\n", proc,
341            makeLineAddress(m_address));
342    DPRINTF(RubyTest, "Callback done\n");
343    debugPrint();
344}
345
346void
347Check::changeAddress(Addr address)
348{
349    assert(m_status == TesterStatus_Idle || m_status == TesterStatus_Ready);
350    m_status = TesterStatus_Idle;
351    m_address = address;
352    DPRINTF(RubyTest, "Check %s, State=Idle\n", m_address);
353    m_store_count = 0;
354}
355
356void
357Check::pickValue()
358{
359    assert(m_status == TesterStatus_Idle);
360    m_value = random_mt.random(0, 0xff); // One byte
361    m_store_count = 0;
362}
363
364void
365Check::pickInitiatingNode()
366{
367    assert(m_status == TesterStatus_Idle || m_status == TesterStatus_Ready);
368    m_status = TesterStatus_Idle;
369    m_initiatingNode = (random_mt.random(0, m_num_writers - 1));
370    DPRINTF(RubyTest, "Check %s, State=Idle, picked initiating node %d\n",
371            m_address, m_initiatingNode);
372    m_store_count = 0;
373}
374
375void
376Check::print(std::ostream& out) const
377{
378    out << "["
379        << m_address << ", value: "
380        << (int)m_value << ", status: "
381        << m_status << ", initiating node: "
382        << m_initiatingNode << ", store_count: "
383        << m_store_count
384        << "]" << std::flush;
385}
386
387void
388Check::debugPrint()
389{
390    DPRINTF(RubyTest,
391        "[%#x, value: %d, status: %s, initiating node: %d, store_count: %d]\n",
392        m_address, (int)m_value, TesterStatus_to_string(m_status).c_str(),
393        m_initiatingNode, m_store_count);
394}
395