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