system.hh revision 2665 
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 ExecContext;
37
38class BreakPCEvent;
39class IdleStartEvent;
40
41#include "arch/alpha/system.hh"
42#include "kern/linux/events.hh"
43
44using namespace AlphaISA;
45using namespace Linux;
46
47/**
48 * This class contains linux specific system code (Loading, Events, Binning).
49 * It points to objects that are the system binaries to load and patches them
50 * appropriately to work in simulator.
51 */
52class LinuxAlphaSystem : public AlphaSystem
53{
54  private:
55    class SkipDelayLoopEvent : public SkipFuncEvent
56    {
57      public:
58        SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr)
59            : SkipFuncEvent(q, desc, addr) {}
60        virtual void process(ExecContext *xc);
61    };
62
63    class PrintThreadInfo : public PCEvent
64    {
65      public:
66        PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr)
67            : PCEvent(q, desc, addr) {}
68        virtual void process(ExecContext *xc);
69    };
70
71
72    /**
73     * Addresses defining where the kernel bootloader places various
74     * elements.  Details found in include/asm-alpha/system.h
75     */
76    Addr KernelStart; // Lookup the symbol swapper_pg_dir
77
78  public:
79    Addr InitStack() const { return KernelStart + 0x02000; }
80    Addr EmptyPGT() const  { return KernelStart + 0x04000; }
81    Addr EmptyPGE() const  { return KernelStart + 0x08000; }
82    Addr ZeroPGE() const   { return KernelStart + 0x0A000; }
83    Addr StartAddr() const { return KernelStart + 0x10000; }
84
85    Addr Param() const { return ZeroPGE() + 0x0; }
86    Addr CommandLine() const { return Param() + 0x0; }
87    Addr InitrdStart() const { return Param() + 0x100; }
88    Addr InitrdSize() const { return Param() + 0x108; }
89    static const int CommandLineSize = 256;
90
91  private:
92#ifndef NDEBUG
93    /** Event to halt the simulator if the kernel calls panic()  */
94    BreakPCEvent *kernelPanicEvent;
95
96    /** Event to halt the simulator if the kernel calls die_if_kernel  */
97    BreakPCEvent *kernelDieEvent;
98#endif
99
100    /**
101     * Event to skip determine_cpu_caches() because we don't support
102     * the IPRs that the code can access to figure out cache sizes
103     */
104    SkipFuncEvent *skipCacheProbeEvent;
105
106    /** PC based event to skip the ide_delay_50ms() call */
107    SkipFuncEvent *skipIdeDelay50msEvent;
108
109    /**
110     * PC based event to skip the dprink() call and emulate its
111     * functionality
112     */
113    DebugPrintkEvent *debugPrintkEvent;
114
115    /**
116     * Skip calculate_delay_loop() rather than waiting for this to be
117     * calculated
118     */
119    SkipDelayLoopEvent *skipDelayLoopEvent;
120
121    /**
122     * Event to print information about thread switches if the trace flag
123     * Thread is set
124     */
125    PrintThreadInfo *printThreadEvent;
126
127    /**
128     * Event to bin Interrupts seperately from kernel code
129     */
130    InterruptStartEvent *intStartEvent;
131
132    /**
133     * Event to bin Interrupts seperately from kernel code
134     */
135    InterruptEndEvent *intEndEvent;
136    InterruptEndEvent *intEndEvent2;
137    InterruptEndEvent *intEndEvent3;
138
139    /** Grab the PCBB of the idle process when it starts */
140    IdleStartEvent *idleStartEvent;
141
142  public:
143    LinuxAlphaSystem(Params *p);
144    ~LinuxAlphaSystem();
145
146    void setDelayLoop(ExecContext *xc);
147};
148
149#endif // __ARCH_ALPHA_LINUX_SYSTEM_HH__
150