system.hh revision 1082 
1/*
2 * Copyright (c) 2004 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
32#include "sim/host.hh"
33#include "sim/system.hh"
34#include "targetarch/isa_traits.hh"
35
36/**
37 * MAGIC address where the kernel arguments should go. Defined as
38 * PARAM in linux kernel alpha-asm.
39 */
40const Addr PARAM_ADDR = ULL(0xfffffc000030a000);
41
42class ExecContext;
43
44class BreakPCEvent;
45class DebugPrintkEvent;
46class BreakPCEvent;
47class LinuxSkipDelayLoopEvent;
48class SkipFuncEvent;
49class IdleStartEvent;
50class PrintThreadInfo;
51
52/**
53 * This class contains linux specific system code (Loading, Events, Binning).
54 * It points to objects that are the system binaries to load and patches them
55 * appropriately to work in simulator.
56 */
57class LinuxSystem : public System
58{
59  private:
60#ifdef DEBUG
61    /** Event to halt the simulator if the kernel calls panic()  */
62    BreakPCEvent *kernelPanicEvent;
63#endif
64
65    /**
66     * Event to skip determine_cpu_caches() because we don't support
67     * the IPRs that the code can access to figure out cache sizes
68     */
69    SkipFuncEvent *skipCacheProbeEvent;
70
71    /** PC based event to skip the ide_delay_50ms() call */
72    SkipFuncEvent *skipIdeDelay50msEvent;
73
74    /**
75     * PC based event to skip the dprink() call and emulate its
76     * functionality
77     */
78    DebugPrintkEvent *debugPrintkEvent;
79
80    /**
81     * Skip calculate_delay_loop() rather than waiting for this to be
82     * calculated
83     */
84    LinuxSkipDelayLoopEvent *skipDelayLoopEvent;
85
86    /**
87     * Event to print information about thread switches if the trace flag
88     * Thread is set
89     */
90    PrintThreadInfo *printThreadEvent;
91
92    /**
93     * Event to bin Interrupts seperately from kernel code
94     */
95    InterruptStartEvent *intStartEvent;
96
97    /**
98     * Event to bin Interrupts seperately from kernel code
99     */
100    InterruptEndEvent *intEndEvent;
101
102    /** Grab the PCBB of the idle process when it starts */
103    IdleStartEvent *idleStartEvent;
104
105  public:
106    LinuxSystem(Params *p);
107    ~LinuxSystem();
108
109    void setDelayLoop(ExecContext *xc);
110};
111
112#endif // __KERN_LINUX_LINUX_SYSTEM_HH__
113