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/*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* Copyright (c) 2011 Regents of the University of California
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Steve Reinhardt
* Lisa Hsu
* Nathan Binkert
* Rick Strong
*/
#ifndef __SYSTEM_HH__
#define __SYSTEM_HH__
#include <string>
#include <vector>
#include "base/loader/symtab.hh"
#include "base/misc.hh"
#include "base/statistics.hh"
#include "config/full_system.hh"
#include "cpu/pc_event.hh"
#include "enums/MemoryMode.hh"
#include "mem/port.hh"
#include "params/System.hh"
#include "sim/sim_object.hh"
#if FULL_SYSTEM
#include "kern/system_events.hh"
#endif
class BaseCPU;
class ThreadContext;
class ObjectFile;
class PhysicalMemory;
#if FULL_SYSTEM
class Platform;
class FunctionalPort;
class VirtualPort;
#endif
class GDBListener;
class BaseRemoteGDB;
class System : public SimObject
{
public:
static const char *MemoryModeStrings[3];
Enums::MemoryMode
getMemoryMode()
{
assert(memoryMode);
return memoryMode;
}
/** Change the memory mode of the system. This should only be called by the
* python!!
* @param mode Mode to change to (atomic/timing)
*/
void setMemoryMode(Enums::MemoryMode mode);
PhysicalMemory *physmem;
PCEventQueue pcEventQueue;
std::vector<ThreadContext *> threadContexts;
int _numContexts;
ThreadContext *getThreadContext(ThreadID tid)
{
return threadContexts[tid];
}
int numContexts()
{
assert(_numContexts == (int)threadContexts.size());
return _numContexts;
}
/** Return number of running (non-halted) thread contexts in
* system. These threads could be Active or Suspended. */
int numRunningContexts();
/** List to store ranges of memories in this system */
AddrRangeList memRanges;
/** check if an address points to valid system memory
* and thus we can fetch instructions out of it
*/
bool isMemory(const Addr addr) const;
#if FULL_SYSTEM
Platform *platform;
uint64_t init_param;
/** Port to physical memory used for writing object files into ram at
* boot.*/
FunctionalPort *functionalPort;
VirtualPort *virtPort;
/** kernel symbol table */
SymbolTable *kernelSymtab;
/** Object pointer for the kernel code */
ObjectFile *kernel;
/** Begining of kernel code */
Addr kernelStart;
/** End of kernel code */
Addr kernelEnd;
/** Entry point in the kernel to start at */
Addr kernelEntry;
/** Mask that should be anded for binary/symbol loading.
* This allows one two different OS requirements for the same ISA to be
* handled. Some OSes are compiled for a virtual address and need to be
* loaded into physical memory that starts at address 0, while other
* bare metal tools generate images that start at address 0.
*/
Addr loadAddrMask;
#else
Addr pagePtr;
protected:
uint64_t nextPID;
public:
uint64_t allocatePID()
{
return nextPID++;
}
/** Amount of physical memory that is still free */
Addr freeMemSize();
/** Amount of physical memory that exists */
Addr memSize();
#endif // FULL_SYSTEM
protected:
Enums::MemoryMode memoryMode;
uint64_t workItemsBegin;
uint64_t workItemsEnd;
uint32_t numWorkIds;
std::vector<bool> activeCpus;
public:
virtual void regStats();
/**
* Called by pseudo_inst to track the number of work items started by this
* system.
*/
uint64_t
incWorkItemsBegin()
{
return ++workItemsBegin;
}
/**
* Called by pseudo_inst to track the number of work items completed by
* this system.
*/
uint64_t
incWorkItemsEnd()
{
return ++workItemsEnd;
}
/**
* Called by pseudo_inst to mark the cpus actively executing work items.
* Returns the total number of cpus that have executed work item begin or
* ends.
*/
int
markWorkItem(int index)
{
int count = 0;
assert(index < activeCpus.size());
activeCpus[index] = true;
for (std::vector<bool>::iterator i = activeCpus.begin();
i < activeCpus.end(); i++) {
if (*i) count++;
}
return count;
}
inline void workItemBegin(uint32_t tid, uint32_t workid)
{
std::pair<uint32_t,uint32_t> p(tid, workid);
lastWorkItemStarted[p] = curTick();
}
void workItemEnd(uint32_t tid, uint32_t workid);
#if FULL_SYSTEM
/**
* Fix up an address used to match PCs for hooking simulator
* events on to target function executions. See comment in
* system.cc for details.
*/
virtual Addr fixFuncEventAddr(Addr addr) = 0;
/**
* Add a function-based event to the given function, to be looked
* up in the specified symbol table.
*/
template <class T>
T *addFuncEvent(SymbolTable *symtab, const char *lbl)
{
Addr addr = 0; // initialize only to avoid compiler warning
if (symtab->findAddress(lbl, addr)) {
T *ev = new T(&pcEventQueue, lbl, fixFuncEventAddr(addr));
return ev;
}
return NULL;
}
/** Add a function-based event to kernel code. */
template <class T>
T *addKernelFuncEvent(const char *lbl)
{
return addFuncEvent<T>(kernelSymtab, lbl);
}
#endif
public:
std::vector<BaseRemoteGDB *> remoteGDB;
std::vector<GDBListener *> gdbListen;
bool breakpoint();
public:
typedef SystemParams Params;
protected:
Params *_params;
public:
System(Params *p);
~System();
void initState();
const Params *params() const { return (const Params *)_params; }
public:
#if FULL_SYSTEM
/**
* Returns the addess the kernel starts at.
* @return address the kernel starts at
*/
Addr getKernelStart() const { return kernelStart; }
/**
* Returns the addess the kernel ends at.
* @return address the kernel ends at
*/
Addr getKernelEnd() const { return kernelEnd; }
/**
* Returns the addess the entry point to the kernel code.
* @return entry point of the kernel code
*/
Addr getKernelEntry() const { return kernelEntry; }
#else
/// Allocate npages contiguous unused physical pages
/// @return Starting address of first page
Addr allocPhysPages(int npages);
#endif // FULL_SYSTEM
int registerThreadContext(ThreadContext *tc, int assigned=-1);
void replaceThreadContext(ThreadContext *tc, int context_id);
void serialize(std::ostream &os);
void unserialize(Checkpoint *cp, const std::string §ion);
virtual void resume();
public:
Counter totalNumInsts;
EventQueue instEventQueue;
std::map<std::pair<uint32_t,uint32_t>, Tick> lastWorkItemStarted;
std::map<uint32_t, Stats::Histogram*> workItemStats;
////////////////////////////////////////////
//
// STATIC GLOBAL SYSTEM LIST
//
////////////////////////////////////////////
static std::vector<System *> systemList;
static int numSystemsRunning;
static void printSystems();
};
#endif // __SYSTEM_HH__
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