system.hh revision 9050:ed4378739b6e 
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2002-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 */
42
43#ifndef __ARCH_ARM_SYSTEM_HH__
44#define __ARCH_ARM_SYSTEM_HH__
45
46#include <string>
47#include <vector>
48
49#include "kern/linux/events.hh"
50#include "params/ArmSystem.hh"
51#include "sim/sim_object.hh"
52#include "sim/system.hh"
53
54class ArmSystem : public System
55{
56  protected:
57    /**
58     * PC based event to skip the dprink() call and emulate its
59     * functionality
60     */
61    Linux::DebugPrintkEvent *debugPrintkEvent;
62
63    /**
64     * Pointer to the bootloader object
65     */
66    ObjectFile *bootldr;
67
68  public:
69    typedef ArmSystemParams Params;
70    const Params *
71    params() const
72    {
73        return dynamic_cast<const Params *>(_params);
74    }
75
76    ArmSystem(Params *p);
77    ~ArmSystem();
78
79    /**
80     * Initialise the system
81     */
82    virtual void initState();
83
84    /** Check if an address should be uncacheable until all caches are enabled.
85     * This exits because coherence on some addresses at boot is maintained via
86     * sw coherence until the caches are enbaled. Since we don't support sw
87     * coherence operations in gem5, this is a method that allows a system
88     * type to designate certain addresses that should remain uncachebale
89     * for a while.
90     */
91    virtual bool adderBootUncacheable(Addr a) { return false; }
92
93    virtual Addr fixFuncEventAddr(Addr addr)
94    {
95        // Remove the low bit that thumb symbols have set
96        // but that aren't actually odd aligned
97        if (addr & 0x1)
98            return addr & ~1;
99        return addr;
100    }
101
102    /** true if this a multiprocessor system */
103    bool multiProc;
104};
105
106#endif
107
108