system.hh revision 1885 
1/*
2 * Copyright (c) 2004-2005 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#ifndef __KERN_LINUX_LINUX_SYSTEM_HH__
30#define __KERN_LINUX_LINUX_SYSTEM_HH__
31
32class ExecContext;
33
34class BreakPCEvent;
35class IdleStartEvent;
36class PrintThreadInfo;
37
38/**
39 * This class contains linux specific system code (Loading, Events, Binning).
40 * It points to objects that are the system binaries to load and patches them
41 * appropriately to work in simulator.
42 */
43class LinuxSystem : public System
44{
45  private:
46    class SkipDelayLoopEvent : public SkipFuncEvent
47    {
48      public:
49        SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr)
50            : SkipFuncEvent(q, desc, addr) {}
51        virtual void process(ExecContext *xc);
52    };
53
54    class DebugPrintkEvent : public SkipFuncEvent
55    {
56      private:
57        bool raw;
58
59      public:
60        DebugPrintkEvent(PCEventQueue *q, const std::string &desc, Addr addr,
61                         bool r = false)
62            : SkipFuncEvent(q, desc, addr), raw(r) {}
63        virtual void process(ExecContext *xc);
64    };
65
66    class PrintThreadInfo : public PCEvent
67    {
68      public:
69        PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr)
70            : PCEvent(q, desc, addr) {}
71        virtual void process(ExecContext *xc);
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    /**
130     * Event to bin Interrupts seperately from kernel code
131     */
132    InterruptStartEvent *intStartEvent;
133
134    /**
135     * Event to bin Interrupts seperately from kernel code
136     */
137    InterruptEndEvent *intEndEvent;
138    InterruptEndEvent *intEndEvent2;
139    InterruptEndEvent *intEndEvent3;
140
141    /** Grab the PCBB of the idle process when it starts */
142    IdleStartEvent *idleStartEvent;
143
144  public:
145    LinuxSystem(Params *p);
146    ~LinuxSystem();
147
148    void setDelayLoop(ExecContext *xc);
149};
150
151#endif // __KERN_LINUX_LINUX_SYSTEM_HH__
152