system.hh revision 2632:1bb2f91485ea 
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
29#ifndef __ARCH_ALPHA_LINUX_SYSTEM_HH__
30#define __ARCH_ALPHA_LINUX_SYSTEM_HH__
31
32class ExecContext;
33
34class BreakPCEvent;
35class IdleStartEvent;
36
37#include "arch/alpha/system.hh"
38#include "kern/linux/events.hh"
39
40using namespace AlphaISA;
41using namespace Linux;
42
43/**
44 * This class contains linux specific system code (Loading, Events, Binning).
45 * It points to objects that are the system binaries to load and patches them
46 * appropriately to work in simulator.
47 */
48class LinuxAlphaSystem : public AlphaSystem
49{
50  private:
51    class SkipDelayLoopEvent : public SkipFuncEvent
52    {
53      public:
54        SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr)
55            : SkipFuncEvent(q, desc, addr) {}
56        virtual void process(ExecContext *xc);
57    };
58
59    class PrintThreadInfo : public PCEvent
60    {
61      public:
62        PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr)
63            : PCEvent(q, desc, addr) {}
64        virtual void process(ExecContext *xc);
65    };
66
67
68    /**
69     * Addresses defining where the kernel bootloader places various
70     * elements.  Details found in include/asm-alpha/system.h
71     */
72    Addr KernelStart; // Lookup the symbol swapper_pg_dir
73
74  public:
75    Addr InitStack() const { return KernelStart + 0x02000; }
76    Addr EmptyPGT() const  { return KernelStart + 0x04000; }
77    Addr EmptyPGE() const  { return KernelStart + 0x08000; }
78    Addr ZeroPGE() const   { return KernelStart + 0x0A000; }
79    Addr StartAddr() const { return KernelStart + 0x10000; }
80
81    Addr Param() const { return ZeroPGE() + 0x0; }
82    Addr CommandLine() const { return Param() + 0x0; }
83    Addr InitrdStart() const { return Param() + 0x100; }
84    Addr InitrdSize() const { return Param() + 0x108; }
85    static const int CommandLineSize = 256;
86
87  private:
88#ifndef NDEBUG
89    /** Event to halt the simulator if the kernel calls panic()  */
90    BreakPCEvent *kernelPanicEvent;
91
92    /** Event to halt the simulator if the kernel calls die_if_kernel  */
93    BreakPCEvent *kernelDieEvent;
94#endif
95
96    /**
97     * Event to skip determine_cpu_caches() because we don't support
98     * the IPRs that the code can access to figure out cache sizes
99     */
100    SkipFuncEvent *skipCacheProbeEvent;
101
102    /** PC based event to skip the ide_delay_50ms() call */
103    SkipFuncEvent *skipIdeDelay50msEvent;
104
105    /**
106     * PC based event to skip the dprink() call and emulate its
107     * functionality
108     */
109    DebugPrintkEvent *debugPrintkEvent;
110
111    /**
112     * Skip calculate_delay_loop() rather than waiting for this to be
113     * calculated
114     */
115    SkipDelayLoopEvent *skipDelayLoopEvent;
116
117    /**
118     * Event to print information about thread switches if the trace flag
119     * Thread is set
120     */
121    PrintThreadInfo *printThreadEvent;
122
123    /**
124     * Event to bin Interrupts seperately from kernel code
125     */
126    InterruptStartEvent *intStartEvent;
127
128    /**
129     * Event to bin Interrupts seperately from kernel code
130     */
131    InterruptEndEvent *intEndEvent;
132    InterruptEndEvent *intEndEvent2;
133    InterruptEndEvent *intEndEvent3;
134
135    /** Grab the PCBB of the idle process when it starts */
136    IdleStartEvent *idleStartEvent;
137
138  public:
139    LinuxAlphaSystem(Params *p);
140    ~LinuxAlphaSystem();
141
142    void setDelayLoop(ExecContext *xc);
143};
144
145#endif // __ARCH_ALPHA_LINUX_SYSTEM_HH__
146