314 lines
8 KiB
C++
314 lines
8 KiB
C++
/*
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* Copyright (c) 2002-2005 The Regents of The University of Michigan
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* Copyright (c) 2011 Regents of the University of California
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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: Steve Reinhardt
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* Lisa Hsu
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* Nathan Binkert
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* Rick Strong
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*/
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#ifndef __SYSTEM_HH__
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#define __SYSTEM_HH__
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#include <string>
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#include <vector>
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#include "base/loader/symtab.hh"
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#include "base/misc.hh"
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#include "base/statistics.hh"
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#include "config/full_system.hh"
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#include "cpu/pc_event.hh"
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#include "enums/MemoryMode.hh"
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#include "mem/port.hh"
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#include "params/System.hh"
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#include "sim/sim_object.hh"
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#if FULL_SYSTEM
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#include "kern/system_events.hh"
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#endif
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class BaseCPU;
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class ThreadContext;
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class ObjectFile;
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class PhysicalMemory;
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#if FULL_SYSTEM
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class Platform;
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class FunctionalPort;
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class VirtualPort;
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#endif
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class GDBListener;
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class BaseRemoteGDB;
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class System : public SimObject
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{
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public:
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static const char *MemoryModeStrings[3];
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Enums::MemoryMode
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getMemoryMode()
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{
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assert(memoryMode);
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return memoryMode;
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}
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/** Change the memory mode of the system. This should only be called by the
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* python!!
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* @param mode Mode to change to (atomic/timing)
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*/
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void setMemoryMode(Enums::MemoryMode mode);
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PhysicalMemory *physmem;
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PCEventQueue pcEventQueue;
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std::vector<ThreadContext *> threadContexts;
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int _numContexts;
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ThreadContext *getThreadContext(ThreadID tid)
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{
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return threadContexts[tid];
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}
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int numContexts()
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{
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assert(_numContexts == (int)threadContexts.size());
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return _numContexts;
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}
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/** Return number of running (non-halted) thread contexts in
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* system. These threads could be Active or Suspended. */
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int numRunningContexts();
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/** List to store ranges of memories in this system */
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AddrRangeList memRanges;
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/** check if an address points to valid system memory
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* and thus we can fetch instructions out of it
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*/
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bool isMemory(const Addr addr) const;
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Addr pagePtr;
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#if FULL_SYSTEM
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uint64_t init_param;
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/** Port to physical memory used for writing object files into ram at
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* boot.*/
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FunctionalPort *functionalPort;
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VirtualPort *virtPort;
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/** kernel symbol table */
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SymbolTable *kernelSymtab;
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/** Object pointer for the kernel code */
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ObjectFile *kernel;
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/** Begining of kernel code */
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Addr kernelStart;
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/** End of kernel code */
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Addr kernelEnd;
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/** Entry point in the kernel to start at */
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Addr kernelEntry;
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/** Mask that should be anded for binary/symbol loading.
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* This allows one two different OS requirements for the same ISA to be
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* handled. Some OSes are compiled for a virtual address and need to be
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* loaded into physical memory that starts at address 0, while other
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* bare metal tools generate images that start at address 0.
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*/
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Addr loadAddrMask;
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#endif // FULL_SYSTEM
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protected:
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uint64_t nextPID;
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public:
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uint64_t allocatePID()
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{
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return nextPID++;
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}
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/** Amount of physical memory that is still free */
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Addr freeMemSize();
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/** Amount of physical memory that exists */
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Addr memSize();
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protected:
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Enums::MemoryMode memoryMode;
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uint64_t workItemsBegin;
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uint64_t workItemsEnd;
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std::vector<bool> activeCpus;
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public:
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/**
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* Called by pseudo_inst to track the number of work items started by this
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* system.
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*/
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uint64_t
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incWorkItemsBegin()
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{
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return ++workItemsBegin;
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}
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/**
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* Called by pseudo_inst to track the number of work items completed by
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* this system.
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*/
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uint64_t
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incWorkItemsEnd()
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{
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return ++workItemsEnd;
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}
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/**
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* Called by pseudo_inst to mark the cpus actively executing work items.
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* Returns the total number of cpus that have executed work item begin or
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* ends.
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*/
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int
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markWorkItem(int index)
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{
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int count = 0;
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assert(index < activeCpus.size());
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activeCpus[index] = true;
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for (std::vector<bool>::iterator i = activeCpus.begin();
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i < activeCpus.end(); i++) {
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if (*i) count++;
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}
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return count;
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}
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#if FULL_SYSTEM
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/**
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* Fix up an address used to match PCs for hooking simulator
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* events on to target function executions. See comment in
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* system.cc for details.
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*/
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virtual Addr fixFuncEventAddr(Addr addr) = 0;
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/**
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* Add a function-based event to the given function, to be looked
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* up in the specified symbol table.
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*/
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template <class T>
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T *addFuncEvent(SymbolTable *symtab, const char *lbl)
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{
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Addr addr = 0; // initialize only to avoid compiler warning
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if (symtab->findAddress(lbl, addr)) {
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T *ev = new T(&pcEventQueue, lbl, fixFuncEventAddr(addr));
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return ev;
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}
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return NULL;
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}
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/** Add a function-based event to kernel code. */
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template <class T>
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T *addKernelFuncEvent(const char *lbl)
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{
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return addFuncEvent<T>(kernelSymtab, lbl);
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}
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#endif
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public:
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std::vector<BaseRemoteGDB *> remoteGDB;
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std::vector<GDBListener *> gdbListen;
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bool breakpoint();
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public:
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typedef SystemParams Params;
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protected:
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Params *_params;
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public:
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System(Params *p);
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~System();
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void initState();
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const Params *params() const { return (const Params *)_params; }
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public:
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#if FULL_SYSTEM
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/**
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* Returns the addess the kernel starts at.
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* @return address the kernel starts at
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*/
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Addr getKernelStart() const { return kernelStart; }
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/**
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* Returns the addess the kernel ends at.
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* @return address the kernel ends at
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*/
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Addr getKernelEnd() const { return kernelEnd; }
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/**
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* Returns the addess the entry point to the kernel code.
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* @return entry point of the kernel code
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*/
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Addr getKernelEntry() const { return kernelEntry; }
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#endif
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Addr new_page();
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int registerThreadContext(ThreadContext *tc, int assigned=-1);
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void replaceThreadContext(ThreadContext *tc, int context_id);
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void serialize(std::ostream &os);
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void unserialize(Checkpoint *cp, const std::string §ion);
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virtual void resume();
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public:
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Counter totalNumInsts;
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EventQueue instEventQueue;
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////////////////////////////////////////////
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//
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// STATIC GLOBAL SYSTEM LIST
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//
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////////////////////////////////////////////
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static std::vector<System *> systemList;
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static int numSystemsRunning;
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static void printSystems();
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};
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#endif // __SYSTEM_HH__
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