system.hh revision 8870:f95c4042f2d0 
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_LINUX_SYSTEM_HH__
44#define __ARCH_ARM_LINUX_SYSTEM_HH__
45
46#include <string>
47#include <vector>
48
49#include "arch/arm/system.hh"
50#include "kern/linux/events.hh"
51#include "params/LinuxArmSystem.hh"
52
53class LinuxArmSystem : public ArmSystem
54{
55  public:
56    /** Boilerplate params code */
57    typedef LinuxArmSystemParams Params;
58    const Params *
59    params() const
60    {
61        return dynamic_cast<const Params *>(_params);
62    }
63
64    LinuxArmSystem(Params *p);
65    ~LinuxArmSystem();
66
67    void initState();
68
69    bool adderBootUncacheable(Addr a);
70
71  private:
72#ifndef NDEBUG
73    /** Event to halt the simulator if the kernel calls panic()  */
74    BreakPCEvent *kernelPanicEvent;
75#endif
76    /**
77     * PC based event to skip udelay(<time>) calls and quiesce the
78     * processor for the appropriate amount of time. This is not functionally
79     * required but does speed up simulation.
80     */
81    Linux::UDelayEvent *uDelaySkipEvent;
82
83    /** Another PC based skip event for const_udelay(). Similar to the udelay
84     * skip, but this function precomputes the first multiply that is done
85     * in the generic case since the parameter is known at compile time.
86     * Thus we need to do some division to get back to us.
87     */
88    Linux::UDelayEvent *constUDelaySkipEvent;
89
90    /** These variables store addresses of important data structures
91     * that are normaly kept coherent at boot with cache mainetence operations.
92     * Since these operations aren't supported in gem5, we keep them coherent
93     * by making them uncacheable until all processors in the system boot.
94     */
95    Addr secDataPtrAddr;
96    Addr secDataAddr;
97    Addr penReleaseAddr;
98};
99
100#endif // __ARCH_ARM_LINUX_SYSTEM_HH__
101
102