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_MIPS_LINUX_SYSTEM_HH__
34#define __ARCH_MIPS_LINUX_SYSTEM_HH__
35
36class ThreadContext;
37
38class BreakPCEvent;
39class IdleStartEvent;
40
41#include "arch/mips/idle_event.hh"
42#include "arch/mips/system.hh"
43#include "kern/linux/events.hh"
44#include "params/LinuxMipsSystem.hh"
45
46/**
47 * This class contains linux specific system code (Loading, Events).
48 * It points to objects that are the system binaries to load and patches them
49 * appropriately to work in simulator.
50 */
51class LinuxMipsSystem : public MipsSystem
52{
53  private:
54    class SkipDelayLoopEvent : public SkipFuncEvent
55    {
56      public:
57        SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr)
58            : SkipFuncEvent(q, desc, addr) {}
59        virtual void process(ThreadContext *tc);
60    };
61
62    class PrintThreadInfo : public PCEvent
63    {
64      public:
65        PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr)
66            : PCEvent(q, desc, addr) {}
67        virtual void process(ThreadContext *tc);
68    };
69
70
71    /**
72     * Addresses defining where the kernel bootloader places various
73     * elements.  Details found in include/asm-mips/system.h
74     */
75    Addr KernelStart; // Lookup the symbol swapper_pg_dir
76
77  public:
78    Addr InitStack() const { return KernelStart + 0x02000; }
79    Addr EmptyPGT() const  { return KernelStart + 0x04000; }
80    Addr EmptyPGE() const  { return KernelStart + 0x08000; }
81    Addr ZeroPGE() const   { return KernelStart + 0x0A000; }
82    Addr StartAddr() const { return KernelStart + 0x10000; }
83
84    Addr Param() const { return ZeroPGE() + 0x0; }
85    Addr CommandLine() const { return Param() + 0x0; }
86    Addr InitrdStart() const { return Param() + 0x100; }
87    Addr InitrdSize() const { return Param() + 0x108; }
88    static const int CommandLineSize = 256;
89
90  public:
91    typedef LinuxMipsSystemParams Params;
92    LinuxMipsSystem(Params *p);
93    ~LinuxMipsSystem();
94
95    void setDelayLoop(ThreadContext *tc);
96};
97
98#endif // __ARCH_MIPS_LINUX_SYSTEM_HH__
99