6f9d294e86
PageTable supported an allocate() call that called back through the Process to allocate memory, but did not have a method to map addresses without allocating new pages. It makes more sense for Process to do the allocation, so this method was renamed allocateMem() and moved to Process, and uses a new map() call on PageTable. The remaining uses of the process pointer in PageTable were only to get the name and the PID, so by passing these in directly in the constructor, we can make PageTable completely independent of Process.
371 lines
9.3 KiB
C++
371 lines
9.3 KiB
C++
/*
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* Copyright (c) 2003-2006 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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* Ali Saidi
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* Rick Strong
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*/
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#include "arch/isa_traits.hh"
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#include "arch/remote_gdb.hh"
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#include "arch/utility.hh"
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#include "base/loader/object_file.hh"
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#include "base/loader/symtab.hh"
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#include "base/trace.hh"
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#include "config/full_system.hh"
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#include "config/the_isa.hh"
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#include "cpu/thread_context.hh"
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#include "debug/Loader.hh"
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#include "mem/mem_object.hh"
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#include "mem/physical.hh"
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#include "sim/byteswap.hh"
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#include "sim/debug.hh"
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#include "sim/system.hh"
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#if FULL_SYSTEM
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#include "arch/vtophys.hh"
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#include "kern/kernel_stats.hh"
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#include "mem/vport.hh"
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#else
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#include "params/System.hh"
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#endif
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using namespace std;
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using namespace TheISA;
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vector<System *> System::systemList;
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int System::numSystemsRunning = 0;
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System::System(Params *p)
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: SimObject(p), physmem(p->physmem), _numContexts(0),
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#if FULL_SYSTEM
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init_param(p->init_param),
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loadAddrMask(p->load_addr_mask),
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#else
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pagePtr(0),
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nextPID(0),
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#endif
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memoryMode(p->mem_mode),
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workItemsBegin(0),
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workItemsEnd(0),
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_params(p),
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totalNumInsts(0),
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instEventQueue("system instruction-based event queue")
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{
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// add self to global system list
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systemList.push_back(this);
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/** Keep track of all memories we can execute code out of
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* in our system
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*/
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for (int x = 0; x < p->memories.size(); x++) {
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if (!p->memories[x])
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continue;
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memRanges.push_back(RangeSize(p->memories[x]->start(),
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p->memories[x]->size()));
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}
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#if FULL_SYSTEM
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kernelSymtab = new SymbolTable;
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if (!debugSymbolTable)
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debugSymbolTable = new SymbolTable;
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/**
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* Get a functional port to memory
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*/
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Port *mem_port;
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functionalPort = new FunctionalPort(name() + "-fport");
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mem_port = physmem->getPort("functional");
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functionalPort->setPeer(mem_port);
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mem_port->setPeer(functionalPort);
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virtPort = new VirtualPort(name() + "-fport");
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mem_port = physmem->getPort("functional");
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virtPort->setPeer(mem_port);
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mem_port->setPeer(virtPort);
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/**
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* Load the kernel code into memory
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*/
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if (params()->kernel == "") {
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inform("No kernel set for full system simulation. Assuming you know what"
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" you're doing...\n");
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} else {
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// Load kernel code
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kernel = createObjectFile(params()->kernel);
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inform("kernel located at: %s", params()->kernel);
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if (kernel == NULL)
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fatal("Could not load kernel file %s", params()->kernel);
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// Load program sections into memory
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kernel->loadSections(functionalPort, loadAddrMask);
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// setup entry points
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kernelStart = kernel->textBase();
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kernelEnd = kernel->bssBase() + kernel->bssSize();
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kernelEntry = kernel->entryPoint();
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// load symbols
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if (!kernel->loadGlobalSymbols(kernelSymtab))
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fatal("could not load kernel symbols\n");
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if (!kernel->loadLocalSymbols(kernelSymtab))
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fatal("could not load kernel local symbols\n");
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if (!kernel->loadGlobalSymbols(debugSymbolTable))
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fatal("could not load kernel symbols\n");
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if (!kernel->loadLocalSymbols(debugSymbolTable))
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fatal("could not load kernel local symbols\n");
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DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
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DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd);
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DPRINTF(Loader, "Kernel entry = %#x\n", kernelEntry);
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DPRINTF(Loader, "Kernel loaded...\n");
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}
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#endif // FULL_SYSTEM
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// increment the number of running systms
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numSystemsRunning++;
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activeCpus.clear();
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}
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System::~System()
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{
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#if FULL_SYSTEM
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delete kernelSymtab;
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delete kernel;
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#else
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panic("System::fixFuncEventAddr needs to be rewritten "
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"to work with syscall emulation");
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#endif // FULL_SYSTEM}
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}
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void
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System::setMemoryMode(Enums::MemoryMode mode)
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{
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assert(getState() == Drained);
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memoryMode = mode;
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}
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bool System::breakpoint()
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{
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if (remoteGDB.size())
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return remoteGDB[0]->breakpoint();
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return false;
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}
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/**
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* Setting rgdb_wait to a positive integer waits for a remote debugger to
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* connect to that context ID before continuing. This should really
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be a parameter on the CPU object or something...
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*/
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int rgdb_wait = -1;
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int
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System::registerThreadContext(ThreadContext *tc, int assigned)
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{
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int id;
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if (assigned == -1) {
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for (id = 0; id < threadContexts.size(); id++) {
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if (!threadContexts[id])
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break;
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}
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if (threadContexts.size() <= id)
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threadContexts.resize(id + 1);
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} else {
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if (threadContexts.size() <= assigned)
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threadContexts.resize(assigned + 1);
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id = assigned;
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}
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if (threadContexts[id])
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fatal("Cannot have two CPUs with the same id (%d)\n", id);
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threadContexts[id] = tc;
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_numContexts++;
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int port = getRemoteGDBPort();
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if (port) {
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RemoteGDB *rgdb = new RemoteGDB(this, tc);
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GDBListener *gdbl = new GDBListener(rgdb, port + id);
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gdbl->listen();
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if (rgdb_wait != -1 && rgdb_wait == id)
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gdbl->accept();
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if (remoteGDB.size() <= id) {
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remoteGDB.resize(id + 1);
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}
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remoteGDB[id] = rgdb;
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}
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activeCpus.push_back(false);
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return id;
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}
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int
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System::numRunningContexts()
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{
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int running = 0;
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for (int i = 0; i < _numContexts; ++i) {
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if (threadContexts[i]->status() != ThreadContext::Halted)
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++running;
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}
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return running;
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}
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void
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System::initState()
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{
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#if FULL_SYSTEM
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int i;
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for (i = 0; i < threadContexts.size(); i++)
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TheISA::startupCPU(threadContexts[i], i);
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#endif
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}
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void
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System::replaceThreadContext(ThreadContext *tc, int context_id)
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{
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if (context_id >= threadContexts.size()) {
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panic("replaceThreadContext: bad id, %d >= %d\n",
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context_id, threadContexts.size());
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}
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threadContexts[context_id] = tc;
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if (context_id < remoteGDB.size())
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remoteGDB[context_id]->replaceThreadContext(tc);
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}
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#if !FULL_SYSTEM
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Addr
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System::allocPhysPages(int npages)
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{
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Addr return_addr = pagePtr << LogVMPageSize;
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pagePtr += npages;
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if (return_addr >= physmem->size())
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fatal("Out of memory, please increase size of physical memory.");
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return return_addr;
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}
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Addr
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System::memSize()
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{
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return physmem->size();
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}
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Addr
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System::freeMemSize()
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{
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return physmem->size() - (pagePtr << LogVMPageSize);
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}
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#endif
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bool
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System::isMemory(const Addr addr) const
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{
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std::list<Range<Addr> >::const_iterator i;
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for (i = memRanges.begin(); i != memRanges.end(); i++) {
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if (*i == addr)
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return true;
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}
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return false;
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}
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void
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System::resume()
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{
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SimObject::resume();
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totalNumInsts = 0;
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}
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void
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System::serialize(ostream &os)
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{
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#if FULL_SYSTEM
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kernelSymtab->serialize("kernel_symtab", os);
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#else // !FULL_SYSTEM
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SERIALIZE_SCALAR(pagePtr);
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SERIALIZE_SCALAR(nextPID);
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#endif
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}
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void
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System::unserialize(Checkpoint *cp, const string §ion)
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{
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#if FULL_SYSTEM
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kernelSymtab->unserialize("kernel_symtab", cp, section);
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#else // !FULL_SYSTEM
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UNSERIALIZE_SCALAR(pagePtr);
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UNSERIALIZE_SCALAR(nextPID);
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#endif
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}
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void
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System::printSystems()
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{
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vector<System *>::iterator i = systemList.begin();
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vector<System *>::iterator end = systemList.end();
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for (; i != end; ++i) {
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System *sys = *i;
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cerr << "System " << sys->name() << ": " << hex << sys << endl;
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}
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}
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void
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printSystems()
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{
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System::printSystems();
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}
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const char *System::MemoryModeStrings[3] = {"invalid", "atomic",
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"timing"};
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#if !FULL_SYSTEM
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System *
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SystemParams::create()
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{
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return new System(this);
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}
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#endif
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