/*
- * Copyright (c) 2011-2012 ARM Limited
+ * Copyright (c) 2011-2014,2017-2018 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* Rick Strong
*/
-#include "arch/isa_traits.hh"
+#include "sim/system.hh"
+
+#include <algorithm>
+
#include "arch/remote_gdb.hh"
#include "arch/utility.hh"
-#include "arch/vtophys.hh"
#include "base/loader/object_file.hh"
#include "base/loader/symtab.hh"
+#include "base/str.hh"
#include "base/trace.hh"
-#include "config/the_isa.hh"
+#include "config/use_kvm.hh"
+#if USE_KVM
+#include "cpu/kvm/base.hh"
+#include "cpu/kvm/vm.hh"
+#endif
+#include "cpu/base.hh"
#include "cpu/thread_context.hh"
#include "debug/Loader.hh"
#include "debug/WorkItems.hh"
-#include "kern/kernel_stats.hh"
-#include "mem/fs_translating_port_proxy.hh"
-#include "mem/mem_object.hh"
+#include "mem/abstract_mem.hh"
#include "mem/physical.hh"
#include "params/System.hh"
#include "sim/byteswap.hh"
#include "sim/debug.hh"
#include "sim/full_system.hh"
-#include "sim/system.hh"
+
+/**
+ * To avoid linking errors with LTO, only include the header if we
+ * actually have a definition.
+ */
+#if THE_ISA != NULL_ISA
+#include "kern/kernel_stats.hh"
+
+#endif
using namespace std;
using namespace TheISA;
System::System(Params *p)
: MemObject(p), _systemPort("system_port", this),
- physmem(p->physmem),
- _numContexts(0),
+ multiThread(p->multi_thread),
+ pagePtr(0),
init_param(p->init_param),
+ physProxy(_systemPort, p->cache_line_size),
+ kernelSymtab(nullptr),
+ kernel(nullptr),
loadAddrMask(p->load_addr_mask),
- nextPID(0),
+ loadAddrOffset(p->load_offset),
+#if USE_KVM
+ kvmVM(p->kvm_vm),
+#else
+ kvmVM(nullptr),
+#endif
+ physmem(name() + ".physmem", p->memories, p->mmap_using_noreserve),
memoryMode(p->mem_mode),
+ _cacheLineSize(p->cache_line_size),
workItemsBegin(0),
workItemsEnd(0),
numWorkIds(p->num_work_ids),
+ thermalModel(p->thermal_model),
_params(p),
totalNumInsts(0),
instEventQueue("system instruction-based event queue")
// add self to global system list
systemList.push_back(this);
- /** Keep track of all memories we can execute code out of
- * in our system
- */
- for (int x = 0; x < p->memories.size(); x++) {
- if (!p->memories[x])
- continue;
- memRanges.push_back(RangeSize(p->memories[x]->start(),
- p->memories[x]->size()));
+#if USE_KVM
+ if (kvmVM) {
+ kvmVM->setSystem(this);
}
+#endif
if (FullSystem) {
kernelSymtab = new SymbolTable;
if (!debugSymbolTable)
debugSymbolTable = new SymbolTable;
+ }
- /**
- * Get a port proxy to memory
- */
- physProxy = new PortProxy(*getSystemPort());
- virtProxy = new FSTranslatingPortProxy(*getSystemPort());
+ // check if the cache line size is a value known to work
+ if (!(_cacheLineSize == 16 || _cacheLineSize == 32 ||
+ _cacheLineSize == 64 || _cacheLineSize == 128))
+ warn_once("Cache line size is neither 16, 32, 64 nor 128 bytes.\n");
+
+ // Get the generic system master IDs
+ MasterID tmp_id M5_VAR_USED;
+ tmp_id = getMasterId(this, "writebacks");
+ assert(tmp_id == Request::wbMasterId);
+ tmp_id = getMasterId(this, "functional");
+ assert(tmp_id == Request::funcMasterId);
+ tmp_id = getMasterId(this, "interrupt");
+ assert(tmp_id == Request::intMasterId);
+
+ if (FullSystem) {
+ if (params()->kernel == "") {
+ inform("No kernel set for full system simulation. "
+ "Assuming you know what you're doing\n");
+ } else {
+ // Get the kernel code
+ kernel = createObjectFile(params()->kernel);
+ inform("kernel located at: %s", params()->kernel);
+
+ if (kernel == NULL)
+ fatal("Could not load kernel file %s", params()->kernel);
+
+ // setup entry points
+ kernelStart = kernel->textBase();
+ kernelEnd = kernel->bssBase() + kernel->bssSize();
+ kernelEntry = kernel->entryPoint();
+
+ // If load_addr_mask is set to 0x0, then auto-calculate
+ // the smallest mask to cover all kernel addresses so gem5
+ // can relocate the kernel to a new offset.
+ if (loadAddrMask == 0) {
+ Addr shift_amt = findMsbSet(kernelEnd - kernelStart) + 1;
+ loadAddrMask = ((Addr)1 << shift_amt) - 1;
+ }
+
+ // load symbols
+ if (!kernel->loadGlobalSymbols(kernelSymtab))
+ fatal("could not load kernel symbols\n");
+
+ if (!kernel->loadLocalSymbols(kernelSymtab))
+ fatal("could not load kernel local symbols\n");
+
+ if (!kernel->loadGlobalSymbols(debugSymbolTable))
+ fatal("could not load kernel symbols\n");
+
+ if (!kernel->loadLocalSymbols(debugSymbolTable))
+ fatal("could not load kernel local symbols\n");
+
+ // Loading only needs to happen once and after memory system is
+ // connected so it will happen in initState()
+ }
+
+ for (const auto &obj_name : p->kernel_extras) {
+ inform("Loading additional kernel object: %s", obj_name);
+ ObjectFile *obj = createObjectFile(obj_name);
+ fatal_if(!obj, "Failed to additional kernel object '%s'.\n",
+ obj_name);
+ kernelExtras.push_back(obj);
+ }
}
+
+ // increment the number of running systems
+ numSystemsRunning++;
+
+ // Set back pointers to the system in all memories
+ for (int x = 0; x < params()->memories.size(); x++)
+ params()->memories[x]->system(this);
}
System::~System()
panic("System port on %s is not connected.\n", name());
}
-Port*
-System::getPort(const std::string &if_name, int idx)
+BaseMasterPort&
+System::getMasterPort(const std::string &if_name, PortID idx)
{
// no need to distinguish at the moment (besides checking)
- return &_systemPort;
+ return _systemPort;
}
void
System::setMemoryMode(Enums::MemoryMode mode)
{
- assert(getState() == Drained);
+ assert(drainState() == DrainState::Drained);
memoryMode = mode;
}
return false;
}
-/**
- * Setting rgdb_wait to a positive integer waits for a remote debugger to
- * connect to that context ID before continuing. This should really
- be a parameter on the CPU object or something...
- */
-int rgdb_wait = -1;
-
-int
-System::registerThreadContext(ThreadContext *tc, int assigned)
+ContextID
+System::registerThreadContext(ThreadContext *tc, ContextID assigned)
{
- int id;
- if (assigned == -1) {
- for (id = 0; id < threadContexts.size(); id++) {
- if (!threadContexts[id])
- break;
- }
-
- if (threadContexts.size() <= id)
- threadContexts.resize(id + 1);
- } else {
- if (threadContexts.size() <= assigned)
- threadContexts.resize(assigned + 1);
- id = assigned;
+ int id = assigned;
+ if (id == InvalidContextID) {
+ // Find an unused context ID for this thread.
+ id = 0;
+ while (id < threadContexts.size() && threadContexts[id])
+ id++;
}
- if (threadContexts[id])
- fatal("Cannot have two CPUs with the same id (%d)\n", id);
+ if (threadContexts.size() <= id)
+ threadContexts.resize(id + 1);
+
+ fatal_if(threadContexts[id],
+ "Cannot have two CPUs with the same id (%d)\n", id);
threadContexts[id] = tc;
- _numContexts++;
+#if THE_ISA != NULL_ISA
int port = getRemoteGDBPort();
if (port) {
- RemoteGDB *rgdb = new RemoteGDB(this, tc);
- GDBListener *gdbl = new GDBListener(rgdb, port + id);
- gdbl->listen();
+ RemoteGDB *rgdb = new RemoteGDB(this, tc, port + id);
+ rgdb->listen();
- if (rgdb_wait != -1 && rgdb_wait == id)
- gdbl->accept();
+ BaseCPU *cpu = tc->getCpuPtr();
+ if (cpu->waitForRemoteGDB()) {
+ inform("%s: Waiting for a remote GDB connection on port %d.\n",
+ cpu->name(), rgdb->port());
+ rgdb->connect();
+ }
if (remoteGDB.size() <= id) {
remoteGDB.resize(id + 1);
}
remoteGDB[id] = rgdb;
}
+#endif
activeCpus.push_back(false);
int
System::numRunningContexts()
{
- int running = 0;
- for (int i = 0; i < _numContexts; ++i) {
- if (threadContexts[i]->status() != ThreadContext::Halted)
- ++running;
- }
- return running;
+ return std::count_if(
+ threadContexts.cbegin(),
+ threadContexts.cend(),
+ [] (ThreadContext* tc) {
+ return tc->status() != ThreadContext::Halted;
+ }
+ );
}
void
System::initState()
{
- int i;
if (FullSystem) {
- for (i = 0; i < threadContexts.size(); i++)
+ for (int i = 0; i < threadContexts.size(); i++)
TheISA::startupCPU(threadContexts[i], i);
// Moved from the constructor to here since it relies on the
// address map being resolved in the interconnect
/**
* Load the kernel code into memory
*/
- if (params()->kernel == "") {
- inform("No kernel set for full system simulation. "
- "Assuming you know what you're doing...\n");
- } else {
- // Load kernel code
- kernel = createObjectFile(params()->kernel);
- inform("kernel located at: %s", params()->kernel);
-
- if (kernel == NULL)
- fatal("Could not load kernel file %s", params()->kernel);
-
+ if (params()->kernel != "") {
+ if (params()->kernel_addr_check) {
+ // Validate kernel mapping before loading binary
+ if (!(isMemAddr((kernelStart & loadAddrMask) +
+ loadAddrOffset) &&
+ isMemAddr((kernelEnd & loadAddrMask) +
+ loadAddrOffset))) {
+ fatal("Kernel is mapped to invalid location (not memory). "
+ "kernelStart 0x(%x) - kernelEnd 0x(%x) %#x:%#x\n",
+ kernelStart,
+ kernelEnd, (kernelStart & loadAddrMask) +
+ loadAddrOffset,
+ (kernelEnd & loadAddrMask) + loadAddrOffset);
+ }
+ }
// Load program sections into memory
- kernel->loadSections(physProxy, loadAddrMask);
-
- // setup entry points
- kernelStart = kernel->textBase();
- kernelEnd = kernel->bssBase() + kernel->bssSize();
- kernelEntry = kernel->entryPoint();
-
- // load symbols
- if (!kernel->loadGlobalSymbols(kernelSymtab))
- fatal("could not load kernel symbols\n");
-
- if (!kernel->loadLocalSymbols(kernelSymtab))
- fatal("could not load kernel local symbols\n");
-
- if (!kernel->loadGlobalSymbols(debugSymbolTable))
- fatal("could not load kernel symbols\n");
-
- if (!kernel->loadLocalSymbols(debugSymbolTable))
- fatal("could not load kernel local symbols\n");
+ kernel->loadSections(physProxy, loadAddrMask, loadAddrOffset);
+ for (const auto &extra_kernel : kernelExtras) {
+ extra_kernel->loadSections(physProxy, loadAddrMask,
+ loadAddrOffset);
+ }
DPRINTF(Loader, "Kernel start = %#x\n", kernelStart);
DPRINTF(Loader, "Kernel end = %#x\n", kernelEnd);
DPRINTF(Loader, "Kernel loaded...\n");
}
}
-
- // increment the number of running systms
- numSystemsRunning++;
-
- activeCpus.clear();
-
- if (!FullSystem)
- return;
-
- for (i = 0; i < threadContexts.size(); i++)
- TheISA::startupCPU(threadContexts[i], i);
}
void
-System::replaceThreadContext(ThreadContext *tc, int context_id)
+System::replaceThreadContext(ThreadContext *tc, ContextID context_id)
{
if (context_id >= threadContexts.size()) {
panic("replaceThreadContext: bad id, %d >= %d\n",
remoteGDB[context_id]->replaceThreadContext(tc);
}
+bool
+System::validKvmEnvironment() const
+{
+#if USE_KVM
+ if (threadContexts.empty())
+ return false;
+
+ for (auto tc : threadContexts) {
+ if (dynamic_cast<BaseKvmCPU*>(tc->getCpuPtr()) == nullptr) {
+ return false;
+ }
+ }
+ return true;
+#else
+ return false;
+#endif
+}
+
Addr
System::allocPhysPages(int npages)
{
- Addr return_addr = pagePtr << LogVMPageSize;
+ Addr return_addr = pagePtr << PageShift;
pagePtr += npages;
- if (pagePtr > physmem->size())
+
+ Addr next_return_addr = pagePtr << PageShift;
+
+ AddrRange m5opRange(0xffff0000, 0xffffffff);
+ if (m5opRange.contains(next_return_addr)) {
+ warn("Reached m5ops MMIO region\n");
+ return_addr = 0xffffffff;
+ pagePtr = 0xffffffff >> PageShift;
+ }
+
+ if ((pagePtr << PageShift) > physmem.totalSize())
fatal("Out of memory, please increase size of physical memory.");
return return_addr;
}
Addr
-System::memSize()
+System::memSize() const
{
- return physmem->size();
+ return physmem.totalSize();
}
Addr
-System::freeMemSize()
+System::freeMemSize() const
{
- return physmem->size() - (pagePtr << LogVMPageSize);
+ return physmem.totalSize() - (pagePtr << PageShift);
}
bool
-System::isMemory(const Addr addr) const
+System::isMemAddr(Addr addr) const
{
- std::list<Range<Addr> >::const_iterator i;
- for (i = memRanges.begin(); i != memRanges.end(); i++) {
- if (*i == addr)
- return true;
- }
- return false;
+ return physmem.isMemAddr(addr);
}
void
-System::resume()
+System::drainResume()
{
- SimObject::resume();
totalNumInsts = 0;
}
void
-System::serialize(ostream &os)
+System::serialize(CheckpointOut &cp) const
{
if (FullSystem)
- kernelSymtab->serialize("kernel_symtab", os);
+ kernelSymtab->serialize("kernel_symtab", cp);
SERIALIZE_SCALAR(pagePtr);
- SERIALIZE_SCALAR(nextPID);
+ serializeSymtab(cp);
+
+ // also serialize the memories in the system
+ physmem.serializeSection(cp, "physmem");
}
void
-System::unserialize(Checkpoint *cp, const string §ion)
+System::unserialize(CheckpointIn &cp)
{
if (FullSystem)
- kernelSymtab->unserialize("kernel_symtab", cp, section);
+ kernelSymtab->unserialize("kernel_symtab", cp);
UNSERIALIZE_SCALAR(pagePtr);
- UNSERIALIZE_SCALAR(nextPID);
+ unserializeSymtab(cp);
+
+ // also unserialize the memories in the system
+ physmem.unserializeSection(cp, "physmem");
}
void
System::regStats()
{
+ MemObject::regStats();
+
for (uint32_t j = 0; j < numWorkIds ; j++) {
workItemStats[j] = new Stats::Histogram();
stringstream namestr;
void
System::printSystems()
{
+ ios::fmtflags flags(cerr.flags());
+
vector<System *>::iterator i = systemList.begin();
vector<System *>::iterator end = systemList.end();
for (; i != end; ++i) {
System *sys = *i;
cerr << "System " << sys->name() << ": " << hex << sys << endl;
}
+
+ cerr.flags(flags);
}
void
System::printSystems();
}
-const char *System::MemoryModeStrings[3] = {"invalid", "atomic",
- "timing"};
+MasterID
+System::getGlobalMasterId(std::string master_name)
+{
+ return _getMasterId(nullptr, master_name);
+}
+
+MasterID
+System::getMasterId(const SimObject* master, std::string submaster)
+{
+ auto master_name = leafMasterName(master, submaster);
+ return _getMasterId(master, master_name);
+}
+
+MasterID
+System::_getMasterId(const SimObject* master, std::string master_name)
+{
+ if (startswith(master_name, name()))
+ master_name = master_name.erase(0, name().size() + 1);
+
+ // CPUs in switch_cpus ask for ids again after switching
+ for (int i = 0; i < masters.size(); i++) {
+ if (masters[i].masterName == master_name) {
+ return i;
+ }
+ }
+
+ // Verify that the statistics haven't been enabled yet
+ // Otherwise objects will have sized their stat buckets and
+ // they will be too small
+
+ if (Stats::enabled()) {
+ fatal("Can't request a masterId after regStats(). "
+ "You must do so in init().\n");
+ }
+
+ // Generate a new MasterID incrementally
+ MasterID master_id = masters.size();
+
+ // Append the new Master metadata to the group of system Masters.
+ masters.emplace_back(master, master_name, master_id);
+
+ return masters.back().masterId;
+}
+
+std::string
+System::leafMasterName(const SimObject* master, const std::string& submaster)
+{
+ if (submaster.empty()) {
+ return master->name();
+ } else {
+ // Get the full master name by appending the submaster name to
+ // the root SimObject master name
+ return master->name() + "." + submaster;
+ }
+}
+
+std::string
+System::getMasterName(MasterID master_id)
+{
+ if (master_id >= masters.size())
+ fatal("Invalid master_id passed to getMasterName()\n");
+
+ const auto& master_info = masters[master_id];
+ return master_info.masterName;
+}
System *
SystemParams::create()
projects / gem5.git / blobdiff