system.hh revision 1855 
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 DebugPrintkEvent;
36class BreakPCEvent;
37class LinuxSkipDelayLoopEvent;
38class SkipFuncEvent;
39class IdleStartEvent;
40class PrintThreadInfo;
41
42/**
43 * This class contains linux specific system code (Loading, Events, Binning).
44 * It points to objects that are the system binaries to load and patches them
45 * appropriately to work in simulator.
46 */
47class LinuxSystem : public System
48{
49  private:
50    /**
51     * Addresses defining where the kernel bootloader places various
52     * elements.  Details found in include/asm-alpha/system.h
53     */
54    Addr KernelStart; // Lookup the symbol swapper_pg_dir
55
56  public:
57    Addr InitStack() const { return KernelStart + 0x02000; }
58    Addr EmptyPGT() const  { return KernelStart + 0x04000; }
59    Addr EmptyPGE() const  { return KernelStart + 0x08000; }
60    Addr ZeroPGE() const   { return KernelStart + 0x0A000; }
61    Addr StartAddr() const { return KernelStart + 0x10000; }
62
63    Addr Param() const { return ZeroPGE() + 0x0; }
64    Addr CommandLine() const { return Param() + 0x0; }
65    Addr InitrdStart() const { return Param() + 0x100; }
66    Addr InitrdSize() const { return Param() + 0x108; }
67    static const int CommandLineSize = 256;
68
69  private:
70#ifndef NDEBUG
71    /** Event to halt the simulator if the kernel calls panic()  */
72    BreakPCEvent *kernelPanicEvent;
73
74    /** Event to halt the simulator if the kernel calls die_if_kernel  */
75    BreakPCEvent *kernelDieEvent;
76#endif
77
78    /**
79     * Event to skip determine_cpu_caches() because we don't support
80     * the IPRs that the code can access to figure out cache sizes
81     */
82    SkipFuncEvent *skipCacheProbeEvent;
83
84    /** PC based event to skip the ide_delay_50ms() call */
85    SkipFuncEvent *skipIdeDelay50msEvent;
86
87    /**
88     * PC based event to skip the dprink() call and emulate its
89     * functionality
90     */
91    DebugPrintkEvent *debugPrintkEvent;
92
93    /**
94     * Skip calculate_delay_loop() rather than waiting for this to be
95     * calculated
96     */
97    LinuxSkipDelayLoopEvent *skipDelayLoopEvent;
98
99    /**
100     * Event to print information about thread switches if the trace flag
101     * Thread is set
102     */
103    PrintThreadInfo *printThreadEvent;
104
105    /**
106     * Event to bin Interrupts seperately from kernel code
107     */
108    InterruptStartEvent *intStartEvent;
109
110    /**
111     * Event to bin Interrupts seperately from kernel code
112     */
113    InterruptEndEvent *intEndEvent;
114    InterruptEndEvent *intEndEvent2;
115    InterruptEndEvent *intEndEvent3;
116
117    /** Grab the PCBB of the idle process when it starts */
118    IdleStartEvent *idleStartEvent;
119
120  public:
121    LinuxSystem(Params *p);
122    ~LinuxSystem();
123
124    void setDelayLoop(ExecContext *xc);
125};
126
127#endif // __KERN_LINUX_LINUX_SYSTEM_HH__
128