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/*
* Copyright .AN) 2007 MIPS Technologies, Inc. All Rights Reserved
*
* This software is part of the M5 simulator.
*
* THIS IS A LEGAL AGREEMENT. BY DOWNLOADING, USING, COPYING, CREATING
* DERIVATIVE WORKS, AND/OR DISTRIBUTING THIS SOFTWARE YOU ARE AGREEING
* TO THESE TERMS AND CONDITIONS.
*
* Permission is granted to use, copy, create derivative works and
* distribute this software and such derivative works for any purpose,
* so long as (1) the copyright notice above, this grant of permission,
* and the disclaimer below appear in all copies and derivative works
* made, (2) the copyright notice above is augmented as appropriate to
* reflect the addition of any new copyrightable work in a derivative
* work (e.g., Copyright .AN) <Publication Year> Copyright Owner), and (3)
* the name of MIPS Technologies, Inc. ($B!H(BMIPS$B!I(B) is not used in any
* advertising or publicity pertaining to the use or distribution of
* this software without specific, written prior authorization.
*
* THIS SOFTWARE IS PROVIDED $B!H(BAS IS.$B!I(B MIPS MAKES NO WARRANTIES AND
* DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS, STATUTORY, IMPLIED OR
* OTHERWISE, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
* NON-INFRINGEMENT OF THIRD PARTY RIGHTS, REGARDING THIS SOFTWARE.
* IN NO EVENT SHALL MIPS BE LIABLE FOR ANY DAMAGES, INCLUDING DIRECT,
* INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, OR PUNITIVE DAMAGES OF
* ANY KIND OR NATURE, ARISING OUT OF OR IN CONNECTION WITH THIS AGREEMENT,
* THIS SOFTWARE AND/OR THE USE OF THIS SOFTWARE, WHETHER SUCH LIABILITY
* IS ASSERTED ON THE BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE OR
* STRICT LIABILITY), OR OTHERWISE, EVEN IF MIPS HAS BEEN WARNED OF THE
* POSSIBILITY OF ANY SUCH LOSS OR DAMAGE IN ADVANCE.
*
* Authors: Ali G. Saidi
* Lisa R. Hsu
* Nathan L. Binkert
*/
#ifndef __ARCH_MIPS_LINUX_SYSTEM_HH__
#define __ARCH_MIPS_LINUX_SYSTEM_HH__
class ThreadContext;
class BreakPCEvent;
class IdleStartEvent;
#include "arch/mips/idle_event.hh"
#include "arch/mips/system.hh"
#include "kern/linux/events.hh"
#include "params/LinuxMipsSystem.hh"
using namespace MipsISA;
using namespace Linux;
/**
* This class contains linux specific system code (Loading, Events).
* It points to objects that are the system binaries to load and patches them
* appropriately to work in simulator.
*/
class LinuxMipsSystem : public MipsSystem
{
private:
class SkipDelayLoopEvent : public SkipFuncEvent
{
public:
SkipDelayLoopEvent(PCEventQueue *q, const std::string &desc, Addr addr)
: SkipFuncEvent(q, desc, addr) {}
virtual void process(ThreadContext *tc);
};
class PrintThreadInfo : public PCEvent
{
public:
PrintThreadInfo(PCEventQueue *q, const std::string &desc, Addr addr)
: PCEvent(q, desc, addr) {}
virtual void process(ThreadContext *tc);
};
/**
* Addresses defining where the kernel bootloader places various
* elements. Details found in include/asm-mips/system.h
*/
Addr KernelStart; // Lookup the symbol swapper_pg_dir
public:
Addr InitStack() const { return KernelStart + 0x02000; }
Addr EmptyPGT() const { return KernelStart + 0x04000; }
Addr EmptyPGE() const { return KernelStart + 0x08000; }
Addr ZeroPGE() const { return KernelStart + 0x0A000; }
Addr StartAddr() const { return KernelStart + 0x10000; }
Addr Param() const { return ZeroPGE() + 0x0; }
Addr CommandLine() const { return Param() + 0x0; }
Addr InitrdStart() const { return Param() + 0x100; }
Addr InitrdSize() const { return Param() + 0x108; }
static const int CommandLineSize = 256;
private:
#ifndef NDEBUG
/** Event to halt the simulator if the kernel calls panic() */
BreakPCEvent *kernelPanicEvent;
/** Event to halt the simulator if the kernel calls die_if_kernel */
BreakPCEvent *kernelDieEvent;
#endif
/**
* Event to skip determine_cpu_caches() because we don't support
* the IPRs that the code can access to figure out cache sizes
*/
SkipFuncEvent *skipCacheProbeEvent;
/** PC based event to skip the ide_delay_50ms() call */
SkipFuncEvent *skipIdeDelay50msEvent;
/**
* PC based event to skip the dprink() call and emulate its
* functionality
*/
DebugPrintkEvent *debugPrintkEvent;
/**
* Skip calculate_delay_loop() rather than waiting for this to be
* calculated
*/
SkipDelayLoopEvent *skipDelayLoopEvent;
/**
* Event to print information about thread switches if the trace flag
* Thread is set
*/
PrintThreadInfo *printThreadEvent;
/** Grab the PCBB of the idle process when it starts */
IdleStartEvent *idleStartEvent;
public:
typedef LinuxMipsSystemParams Params;
LinuxMipsSystem(Params *p);
~LinuxMipsSystem();
void setDelayLoop(ThreadContext *tc);
};
#endif // __ARCH_MIPS_LINUX_SYSTEM_HH__
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