system.hh revision 2632:1bb2f91485ea
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 29#ifndef __ARCH_ALPHA_LINUX_SYSTEM_HH__ 30#define __ARCH_ALPHA_LINUX_SYSTEM_HH__ 31 32class ExecContext; 33 34class BreakPCEvent; 35class IdleStartEvent; 36 37#include "arch/alpha/system.hh" 38#include "kern/linux/events.hh" 39 40using namespace AlphaISA; 41using namespace Linux; 42 43/** 44 * This class contains linux specific system code (Loading, Events, Binning). 45 * It points to objects that are the system binaries to load and patches them 46 * appropriately to work in simulator. 47 */ 48class LinuxAlphaSystem : public AlphaSystem 49{ 50 private: 51 class SkipDelayLoopEvent : public SkipFuncEvent 52 { 53 public: 54 SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr) 55 : SkipFuncEvent(q, desc, addr) {} 56 virtual void process(ExecContext *xc); 57 }; 58 59 class PrintThreadInfo : public PCEvent 60 { 61 public: 62 PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr) 63 : PCEvent(q, desc, addr) {} 64 virtual void process(ExecContext *xc); 65 }; 66 67 68 /** 69 * Addresses defining where the kernel bootloader places various 70 * elements. Details found in include/asm-alpha/system.h 71 */ 72 Addr KernelStart; // Lookup the symbol swapper_pg_dir 73 74 public: 75 Addr InitStack() const { return KernelStart + 0x02000; } 76 Addr EmptyPGT() const { return KernelStart + 0x04000; } 77 Addr EmptyPGE() const { return KernelStart + 0x08000; } 78 Addr ZeroPGE() const { return KernelStart + 0x0A000; } 79 Addr StartAddr() const { return KernelStart + 0x10000; } 80 81 Addr Param() const { return ZeroPGE() + 0x0; } 82 Addr CommandLine() const { return Param() + 0x0; } 83 Addr InitrdStart() const { return Param() + 0x100; } 84 Addr InitrdSize() const { return Param() + 0x108; } 85 static const int CommandLineSize = 256; 86 87 private: 88#ifndef NDEBUG 89 /** Event to halt the simulator if the kernel calls panic() */ 90 BreakPCEvent *kernelPanicEvent; 91 92 /** Event to halt the simulator if the kernel calls die_if_kernel */ 93 BreakPCEvent *kernelDieEvent; 94#endif 95 96 /** 97 * Event to skip determine_cpu_caches() because we don't support 98 * the IPRs that the code can access to figure out cache sizes 99 */ 100 SkipFuncEvent *skipCacheProbeEvent; 101 102 /** PC based event to skip the ide_delay_50ms() call */ 103 SkipFuncEvent *skipIdeDelay50msEvent; 104 105 /** 106 * PC based event to skip the dprink() call and emulate its 107 * functionality 108 */ 109 DebugPrintkEvent *debugPrintkEvent; 110 111 /** 112 * Skip calculate_delay_loop() rather than waiting for this to be 113 * calculated 114 */ 115 SkipDelayLoopEvent *skipDelayLoopEvent; 116 117 /** 118 * Event to print information about thread switches if the trace flag 119 * Thread is set 120 */ 121 PrintThreadInfo *printThreadEvent; 122 123 /** 124 * Event to bin Interrupts seperately from kernel code 125 */ 126 InterruptStartEvent *intStartEvent; 127 128 /** 129 * Event to bin Interrupts seperately from kernel code 130 */ 131 InterruptEndEvent *intEndEvent; 132 InterruptEndEvent *intEndEvent2; 133 InterruptEndEvent *intEndEvent3; 134 135 /** Grab the PCBB of the idle process when it starts */ 136 IdleStartEvent *idleStartEvent; 137 138 public: 139 LinuxAlphaSystem(Params *p); 140 ~LinuxAlphaSystem(); 141 142 void setDelayLoop(ExecContext *xc); 143}; 144 145#endif // __ARCH_ALPHA_LINUX_SYSTEM_HH__ 146