events.hh revision 8143 
1/*
2 * Copyright (c) 2004-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 *          Ali Saidi
30 */
31
32#ifndef __KERN_LINUX_EVENTS_HH__
33#define __KERN_LINUX_EVENTS_HH__
34
35#include "kern/system_events.hh"
36
37namespace Linux {
38
39class DebugPrintkEvent : public SkipFuncEvent
40{
41  public:
42    DebugPrintkEvent(PCEventQueue *q, const std::string &desc, Addr addr)
43        : SkipFuncEvent(q, desc, addr) {}
44    virtual void process(ThreadContext *xc);
45};
46
47/** A class to skip udelay() and related calls in the kernel.
48 * This class has two additional parameters that take the argument to udelay and
49 * manipulated it to come up with ns and eventually ticks to quiesce for.
50 * See descriptions of argDivToNs and argMultToNs below.
51 */
52class UDelayEvent : public SkipFuncEvent
53{
54  private:
55    /** value to divide arg by to create ns. This is present beacues the linux
56     * kernel code sometime precomputes the first multiply that is done in
57     * udelay() if the parameter is a constant. We need to undo it so here is
58     * how. */
59    uint64_t argDivToNs;
60
61    /** value to multiple arg by to create ns. Nominally, this is 1000 to
62     * convert us to ns, but since linux can do some preprocessing of constant
63     * values something else might be required. */
64    uint64_t argMultToNs;
65
66  public:
67    UDelayEvent(PCEventQueue *q, const std::string &desc, Addr addr,
68            uint64_t mult, uint64_t div)
69        : SkipFuncEvent(q, desc, addr), argDivToNs(div), argMultToNs(mult) {}
70    virtual void process(ThreadContext *xc);
71};
72
73
74}
75
76#endif
77