events.cc revision 11166 
1/*
2 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
3 * All rights reserved.
4 *
5 * This software was developed by the University of Cambridge Computer
6 * Laboratory as part of the CTSRD Project, with support from the UK Higher
7 * Education Innovation Fund (HEIF).
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions are
11 * met: redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer;
13 * redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution;
16 * neither the name of the copyright holders nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include "kern/freebsd/events.hh"
34
35#include <sstream>
36
37#include "arch/utility.hh"
38#include "base/trace.hh"
39#include "cpu/thread_context.hh"
40#include "debug/DebugPrintf.hh"
41#include "kern/system_events.hh"
42#include "sim/arguments.hh"
43#include "sim/pseudo_inst.hh"
44#include "sim/system.hh"
45
46namespace FreeBSD {
47
48void
49UDelayEvent::process(ThreadContext *tc)
50{
51    int arg_num;
52
53    arg_num = 0;
54
55    // Get the time in native size
56    uint64_t time = TheISA::getArgument(tc, arg_num,  (uint16_t)-1, false);
57
58    //DPRINTFN("DELAY(%d)\n", time);
59
60    // convert parameter to ns
61    if (argDivToNs)
62        time /= argDivToNs;
63
64    time *= argMultToNs;
65
66    SkipFuncEvent::process(tc);
67
68    // Currently, only ARM full-system simulation uses UDelayEvents to skip
69    // __delay and __loop_delay functions. One form involves setting quiesce
70    // time to 0 with the assumption that quiesce will not happen. To avoid
71    // the quiesce handling in this case, only execute the quiesce if time > 0.
72    if (time > 0) {
73        PseudoInst::quiesceNs(tc, time);
74    }
75}
76
77} // namespace FreeBSD
78