system_events.cc revision 1082 
1/*
2 * Copyright (c) 2004 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
29#include "cpu/exec_context.hh"
30#include "cpu/base_cpu.hh"
31#include "cpu/full_cpu/bpred.hh"
32#include "cpu/full_cpu/full_cpu.hh"
33#include "kern/kernel_stats.hh"
34#include "kern/system_events.hh"
35#include "sim/system.hh"
36
37void
38SkipFuncEvent::process(ExecContext *xc)
39{
40    Addr newpc = xc->regs.intRegFile[ReturnAddressReg];
41
42    DPRINTF(PCEvent, "skipping %s: pc=%x, newpc=%x\n", description,
43            xc->regs.pc, newpc);
44
45    xc->regs.pc = newpc;
46    xc->regs.npc = xc->regs.pc + sizeof(MachInst);
47
48    BranchPred *bp = xc->cpu->getBranchPred();
49    if (bp != NULL) {
50        bp->popRAS(xc->thread_num);
51    }
52}
53
54
55FnEvent::FnEvent(PCEventQueue *q, const std::string &desc, Stats::MainBin *bin)
56    : PCEvent(q, desc), _name(desc), mybin(bin)
57{
58}
59
60void
61FnEvent::process(ExecContext *xc)
62{
63    if (xc->misspeculating())
64        return;
65
66    xc->system->kernelBinning->call(xc, mybin);
67}
68
69void
70IdleStartEvent::process(ExecContext *xc)
71{
72    xc->kernelStats->setIdleProcess(xc->regs.ipr[AlphaISA::IPR_PALtemp23]);
73}
74
75void
76InterruptStartEvent::process(ExecContext *xc)
77{
78    xc->kernelStats->mode(Kernel::interrupt);
79}
80
81void
82InterruptEndEvent::process(ExecContext *xc)
83{
84    // We go back to kernel, if we are user, inside the rti
85    // pal code we will get switched to user because of the ICM write
86    xc->kernelStats->mode(Kernel::kernel);
87}
88