diff options
Diffstat (limited to 'src/mem/rubymem.cc')
| -rw-r--r-- | src/mem/rubymem.cc | 240 |
1 files changed, 204 insertions, 36 deletions
diff --git a/src/mem/rubymem.cc b/src/mem/rubymem.cc index 4d9f8051f..74a6e390e 100644 --- a/src/mem/rubymem.cc +++ b/src/mem/rubymem.cc @@ -1,5 +1,6 @@ /* * Copyright (c) 2001-2005 The Regents of The University of Michigan + * Copyright (c) 2009 Advanced Micro Devices, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -26,6 +27,7 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Authors: Daniel Sanchez + * Brad Beckmann */ #include <iostream> @@ -35,6 +37,7 @@ #include "base/output.hh" #include "base/str.hh" #include "base/types.hh" +#include "config/the_isa.hh" #include "mem/ruby/common/Debug.hh" #include "mem/ruby/libruby.hh" #include "mem/ruby/system/RubyPort.hh" @@ -55,13 +58,23 @@ RubyMemory::RubyMemory(const Params *p) ruby_clock = p->clock; ruby_phase = p->phase; + ports_per_cpu = p->ports_per_core; + + DPRINTF(Ruby, "creating Ruby Memory from file %s\n", + p->config_file.c_str()); + ifstream config(p->config_file.c_str()); + if (config.good() == false) { + fatal("Did not successfully open %s.\n", p->config_file.c_str()); + } + vector<RubyObjConf> sys_conf; while (!config.eof()) { - char buffer[4096]; + char buffer[65536]; config.getline(buffer, sizeof(buffer)); string line = buffer; + DPRINTF(Ruby, "%s %d\n", line, line.empty()); if (line.empty()) continue; vector<string> tokens; @@ -80,11 +93,27 @@ RubyMemory::RubyMemory(const Params *p) RubySystem::create(sys_conf); + // + // Create the necessary ruby_ports to connect to the sequencers. + // This code should be fixed when the configuration systems are unified + // and the ruby configuration text files no longer exist. Also, + // it would be great to remove the single ruby_hit_callback func with + // separate pointers to particular ports to rubymem. However, functional + // access currently prevent the improvement. + // for (int i = 0; i < params()->num_cpus; i++) { RubyPort *p = RubySystem::getPort(csprintf("Sequencer_%d", i), ruby_hit_callback); ruby_ports.push_back(p); } + + for (int i = 0; i < params()->num_dmas; i++) { + RubyPort *p = RubySystem::getPort(csprintf("DMASequencer_%d", i), + ruby_hit_callback); + ruby_dma_ports.push_back(p); + } + + pio_port = NULL; } void @@ -105,7 +134,6 @@ RubyMemory::init() //g_debug_ptr->setDebugTime(1); //g_debug_ptr->setDebugOutputFile("ruby.debug"); - g_system_ptr->clearStats(); if (ports.size() == 0) { @@ -117,9 +145,18 @@ RubyMemory::init() (*pi)->sendStatusChange(Port::RangeChange); } + for (PortIterator pi = dma_ports.begin(); pi != dma_ports.end(); ++pi) { + if (*pi) + (*pi)->sendStatusChange(Port::RangeChange); + } + + if (pio_port != NULL) { + pio_port->sendStatusChange(Port::RangeChange); + } + //Print stats at exit - RubyExitCallback* rc = new RubyExitCallback(this); - registerExitCallback(rc); + rubyExitCB = new RubyExitCallback(this); + registerExitCallback(rubyExitCB); //Sched RubyEvent, automatically reschedules to advance ruby cycles rubyTickEvent = new RubyEvent(this); @@ -137,37 +174,57 @@ RubyMemory::tick() RubyMemory::~RubyMemory() { -} - -void -RubyMemory::hitCallback(PacketPtr pkt, Port *port) -{ - DPRINTF(MemoryAccess, "Hit callback\n"); - - bool needsResponse = pkt->needsResponse(); - doAtomicAccess(pkt); - - // turn packet around to go back to requester if response expected - if (needsResponse) { - // recvAtomic() should already have turned packet into - // atomic response - assert(pkt->isResponse()); - DPRINTF(MemoryAccess, "Sending packet back over port\n"); - port->sendTiming(pkt); - } else { - delete pkt; - } - DPRINTF(MemoryAccess, "Hit callback done!\n"); + delete g_system_ptr; } Port * RubyMemory::getPort(const std::string &if_name, int idx) { + DPRINTF(Ruby, "getting port %d %s\n", idx, if_name); + DPRINTF(Ruby, + "number of ruby ports %d and dma ports %d\n", + ruby_ports.size(), + ruby_dma_ports.size()); + + // + // By default, getPort will be passed an idx of -1. Of course this is an + // invalid ruby port index and must be a modified + // + if (idx == -1) { + idx = 0; + } + // Accept request for "functional" port for backwards compatibility // with places where this function is called from C++. I'd prefer // to move all these into Python someday. if (if_name == "functional") { - return new Port(csprintf("%s-functional", name()), this); + assert(idx < ruby_ports.size()); + return new Port(csprintf("%s-functional", name()), + this, + ruby_ports[idx]); + } + + // + // if dma port request, allocate the appropriate prot + // + if (if_name == "dma_port") { + assert(idx < ruby_dma_ports.size()); + RubyMemory::Port* dma_port = + new Port(csprintf("%s-dma_port%d", name(), idx), + this, + ruby_dma_ports[idx]); + dma_ports.push_back(dma_port); + return dma_port; + } + + // + // if pio port, ensure that there is only one + // + if (if_name == "pio_port") { + assert(pio_port == NULL); + pio_port = + new RubyMemory::Port("ruby_pio_port", this, NULL); + return pio_port; } if (if_name != "port") { @@ -182,30 +239,68 @@ RubyMemory::getPort(const std::string &if_name, int idx) panic("RubyMemory::getPort: port %d already assigned", idx); } - Port *port = new Port(csprintf("%s-port%d", name(), idx), this); + // + // Currently this code assumes that each cpu has both a + // icache and dcache port and therefore divides by ports per cpu. This will + // be fixed once we unify the configuration systems and Ruby sequencers + // directly support M5 ports. + // + assert(idx/ports_per_cpu < ruby_ports.size()); + Port *port = new Port(csprintf("%s-port%d", name(), idx), + this, + ruby_ports[idx/ports_per_cpu]); ports[idx] = port; return port; } -RubyMemory::Port::Port(const std::string &_name, RubyMemory *_memory) +RubyMemory::Port::Port(const std::string &_name, + RubyMemory *_memory, + RubyPort *_port) : PhysicalMemory::MemoryPort::MemoryPort(_name, _memory) { + DPRINTF(Ruby, "creating port to ruby memory %s\n", _name); ruby_mem = _memory; + ruby_port = _port; } bool RubyMemory::Port::recvTiming(PacketPtr pkt) { - DPRINTF(MemoryAccess, "Timing access caught\n"); + DPRINTF(MemoryAccess, + "Timing access caught for address %#x\n", + pkt->getAddr()); //dsm: based on SimpleTimingPort::recvTiming(pkt); - // If the device is only a slave, it should only be sending - // responses, which should never get nacked. There used to be - // code to hanldle nacks here, but I'm pretty sure it didn't work - // correctly with the drain code, so that would need to be fixed - // if we ever added it back. + // + // In FS mode, ruby memory will receive pio responses from devices and + // it must forward these responses back to the particular CPU. + // + if (pkt->isResponse() != false && isPioAddress(pkt->getAddr()) != false) { + DPRINTF(MemoryAccess, + "Pio Response callback %#x\n", + pkt->getAddr()); + RubyMemory::SenderState *senderState = + safe_cast<RubyMemory::SenderState *>(pkt->senderState); + RubyMemory::Port *port = senderState->port; + + // pop the sender state from the packet + pkt->senderState = senderState->saved; + delete senderState; + + port->sendTiming(pkt); + + return true; + } + + // + // After checking for pio responses, the remainder of packets + // received by ruby should only be M5 requests, which should never + // get nacked. There used to be code to hanldle nacks here, but + // I'm pretty sure it didn't work correctly with the drain code, + // so that would need to be fixed if we ever added it back. + // assert(pkt->isRequest()); if (pkt->memInhibitAsserted()) { @@ -219,6 +314,18 @@ RubyMemory::Port::recvTiming(PacketPtr pkt) // Save the port in the sender state object pkt->senderState = new SenderState(this, pkt->senderState); + // + // Check for pio requests and directly send them to the dedicated + // pio_port. + // + if (isPioAddress(pkt->getAddr()) != false) { + return ruby_mem->pio_port->sendTiming(pkt); + } + + // + // For DMA and CPU requests, translate them to ruby requests before + // sending them to our assigned ruby port. + // RubyRequestType type = RubyRequestType_NULL; Addr pc = 0; if (pkt->isRead()) { @@ -239,7 +346,6 @@ RubyMemory::Port::recvTiming(PacketPtr pkt) RubyAccessMode_Supervisor); // Submit the ruby request - RubyPort *ruby_port = ruby_mem->ruby_ports[pkt->req->contextId()]; int64_t req_id = ruby_port->makeRequest(ruby_request); if (req_id == -1) { RubyMemory::SenderState *senderState = @@ -260,6 +366,12 @@ RubyMemory::Port::recvTiming(PacketPtr pkt) void ruby_hit_callback(int64_t req_id) { + // + // Note: This single fuction can be called by cpu and dma ports, + // as well as the functional port. The functional port prevents + // us from replacing this single function with separate port + // functions. + // typedef map<int64_t, PacketPtr> map_t; map_t &prm = RubyMemory::pending_requests; @@ -278,13 +390,58 @@ ruby_hit_callback(int64_t req_id) pkt->senderState = senderState->saved; delete senderState; - port->ruby_mem->hitCallback(pkt, port); + port->hitCallback(pkt); } void +RubyMemory::Port::hitCallback(PacketPtr pkt) +{ + + bool needsResponse = pkt->needsResponse(); + + DPRINTF(MemoryAccess, "Hit callback needs response %d\n", + needsResponse); + + ruby_mem->doAtomicAccess(pkt); + + // turn packet around to go back to requester if response expected + if (needsResponse) { + // recvAtomic() should already have turned packet into + // atomic response + assert(pkt->isResponse()); + DPRINTF(MemoryAccess, "Sending packet back over port\n"); + sendTiming(pkt); + } else { + delete pkt; + } + DPRINTF(MemoryAccess, "Hit callback done!\n"); +} + +bool RubyMemory::Port::sendTiming(PacketPtr pkt) { schedSendTiming(pkt, curTick + 1); //minimum latency, must be > 0 + return true; +} + +bool +RubyMemory::Port::isPioAddress(Addr addr) +{ + AddrRangeList pioAddrList; + bool snoop = false; + if (ruby_mem->pio_port == NULL) { + return false; + } + + ruby_mem->pio_port->getPeerAddressRanges(pioAddrList, snoop); + for(AddrRangeIter iter = pioAddrList.begin(); iter != pioAddrList.end(); iter++) { + if (addr >= iter->start && addr <= iter->end) { + DPRINTF(MemoryAccess, "Pio request found in %#llx - %#llx range\n", + iter->start, iter->end); + return true; + } + } + return false; } void RubyMemory::printConfigStats() @@ -311,6 +468,17 @@ void RubyMemory::printConfig(std::ostream & out) const { //g_system_ptr->printConfig(out); } +void RubyMemory::serialize(ostream &os) +{ + PhysicalMemory::serialize(os); +} + +void RubyMemory::unserialize(Checkpoint *cp, const string §ion) +{ + DPRINTF(Config, "Ruby memory being restored\n"); + reschedule(rubyTickEvent, curTick + ruby_clock + ruby_phase); + PhysicalMemory::unserialize(cp, section); +} //Python-interface code RubyMemory * |