134 lines
4.6 KiB
C++
134 lines
4.6 KiB
C++
/*
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* Copyright (c) 2004-2006 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Ali Saidi
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* Lisa Hsu
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* Nathan Binkert
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*/
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#ifndef __ARCH_ALPHA_LINUX_SYSTEM_HH__
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#define __ARCH_ALPHA_LINUX_SYSTEM_HH__
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class ThreadContext;
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class BreakPCEvent;
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class IdleStartEvent;
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#include "arch/alpha/idle_event.hh"
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#include "arch/alpha/system.hh"
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#include "kern/linux/events.hh"
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#include "params/LinuxAlphaSystem.hh"
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/**
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* This class contains linux specific system code (Loading, Events).
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* It points to objects that are the system binaries to load and patches them
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* appropriately to work in simulator.
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*/
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class LinuxAlphaSystem : public AlphaSystem
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{
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private:
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struct SkipDelayLoopEvent : public SkipFuncEvent
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{
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SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr)
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: SkipFuncEvent(q, desc, addr) {}
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virtual void process(ThreadContext *tc);
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};
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struct PrintThreadInfo : public PCEvent
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{
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PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr)
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: PCEvent(q, desc, addr) {}
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virtual void process(ThreadContext *tc);
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};
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/**
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* Addresses defining where the kernel bootloader places various
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* elements. Details found in include/asm-alpha/system.h
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*/
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Addr KernelStart; // Lookup the symbol swapper_pg_dir
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public:
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Addr InitStack() const { return KernelStart + 0x02000; }
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Addr EmptyPGT() const { return KernelStart + 0x04000; }
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Addr EmptyPGE() const { return KernelStart + 0x08000; }
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Addr ZeroPGE() const { return KernelStart + 0x0A000; }
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Addr StartAddr() const { return KernelStart + 0x10000; }
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Addr Param() const { return ZeroPGE() + 0x0; }
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Addr CommandLine() const { return Param() + 0x0; }
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Addr InitrdStart() const { return Param() + 0x100; }
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Addr InitrdSize() const { return Param() + 0x108; }
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static const int CommandLineSize = 256;
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private:
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#ifndef NDEBUG
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/** Event to halt the simulator if the kernel calls panic() */
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BreakPCEvent *kernelPanicEvent;
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/** Event to halt the simulator if the kernel calls die_if_kernel */
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BreakPCEvent *kernelDieEvent;
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#endif
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/**
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* Event to skip determine_cpu_caches() because we don't support
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* the IPRs that the code can access to figure out cache sizes
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*/
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SkipFuncEvent *skipCacheProbeEvent;
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/** PC based event to skip the ide_delay_50ms() call */
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SkipFuncEvent *skipIdeDelay50msEvent;
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/**
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* PC based event to skip the dprink() call and emulate its
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* functionality
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*/
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Linux::DebugPrintkEvent *debugPrintkEvent;
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/**
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* Skip calculate_delay_loop() rather than waiting for this to be
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* calculated
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*/
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SkipDelayLoopEvent *skipDelayLoopEvent;
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/**
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* Event to print information about thread switches if the trace flag
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* Thread is set
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*/
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PrintThreadInfo *printThreadEvent;
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/** Grab the PCBB of the idle process when it starts */
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IdleStartEvent *idleStartEvent;
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public:
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typedef LinuxAlphaSystemParams Params;
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LinuxAlphaSystem(Params *p);
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~LinuxAlphaSystem();
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void setDelayLoop(ThreadContext *tc);
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};
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#endif // __ARCH_ALPHA_LINUX_SYSTEM_HH__
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