system.hh revision 4762 
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: Ali Saidi
29 *          Lisa Hsu
30 *          Nathan Binkert
31 */
32
33#ifndef __ARCH_ALPHA_LINUX_SYSTEM_HH__
34#define __ARCH_ALPHA_LINUX_SYSTEM_HH__
35
36class ThreadContext;
37
38class BreakPCEvent;
39class IdleStartEvent;
40
41#include "arch/alpha/idle_event.hh"
42#include "arch/alpha/system.hh"
43#include "kern/linux/events.hh"
44#include "params/LinuxAlphaSystem.hh"
45
46using namespace AlphaISA;
47using namespace Linux;
48
49/**
50 * This class contains linux specific system code (Loading, Events).
51 * It points to objects that are the system binaries to load and patches them
52 * appropriately to work in simulator.
53 */
54class LinuxAlphaSystem : public AlphaSystem
55{
56  private:
57    class SkipDelayLoopEvent : public SkipFuncEvent
58    {
59      public:
60        SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr)
61            : SkipFuncEvent(q, desc, addr) {}
62        virtual void process(ThreadContext *tc);
63    };
64
65    class PrintThreadInfo : public PCEvent
66    {
67      public:
68        PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr)
69            : PCEvent(q, desc, addr) {}
70        virtual void process(ThreadContext *tc);
71    };
72
73
74    /**
75     * Addresses defining where the kernel bootloader places various
76     * elements.  Details found in include/asm-alpha/system.h
77     */
78    Addr KernelStart; // Lookup the symbol swapper_pg_dir
79
80  public:
81    Addr InitStack() const { return KernelStart + 0x02000; }
82    Addr EmptyPGT() const  { return KernelStart + 0x04000; }
83    Addr EmptyPGE() const  { return KernelStart + 0x08000; }
84    Addr ZeroPGE() const   { return KernelStart + 0x0A000; }
85    Addr StartAddr() const { return KernelStart + 0x10000; }
86
87    Addr Param() const { return ZeroPGE() + 0x0; }
88    Addr CommandLine() const { return Param() + 0x0; }
89    Addr InitrdStart() const { return Param() + 0x100; }
90    Addr InitrdSize() const { return Param() + 0x108; }
91    static const int CommandLineSize = 256;
92
93  private:
94#ifndef NDEBUG
95    /** Event to halt the simulator if the kernel calls panic()  */
96    BreakPCEvent *kernelPanicEvent;
97
98    /** Event to halt the simulator if the kernel calls die_if_kernel  */
99    BreakPCEvent *kernelDieEvent;
100#endif
101
102    /**
103     * Event to skip determine_cpu_caches() because we don't support
104     * the IPRs that the code can access to figure out cache sizes
105     */
106    SkipFuncEvent *skipCacheProbeEvent;
107
108    /** PC based event to skip the ide_delay_50ms() call */
109    SkipFuncEvent *skipIdeDelay50msEvent;
110
111    /**
112     * PC based event to skip the dprink() call and emulate its
113     * functionality
114     */
115    DebugPrintkEvent *debugPrintkEvent;
116
117    /**
118     * Skip calculate_delay_loop() rather than waiting for this to be
119     * calculated
120     */
121    SkipDelayLoopEvent *skipDelayLoopEvent;
122
123    /**
124     * Event to print information about thread switches if the trace flag
125     * Thread is set
126     */
127    PrintThreadInfo *printThreadEvent;
128
129    /** Grab the PCBB of the idle process when it starts */
130    IdleStartEvent *idleStartEvent;
131
132  public:
133    typedef LinuxAlphaSystemParams Params;
134    LinuxAlphaSystem(Params *p);
135    ~LinuxAlphaSystem();
136
137    void setDelayLoop(ThreadContext *tc);
138};
139
140#endif // __ARCH_ALPHA_LINUX_SYSTEM_HH__
141