Sequencer.cc revision 6886
16145Snate@binkert.org 26145Snate@binkert.org/* 36145Snate@binkert.org * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 46145Snate@binkert.org * All rights reserved. 56145Snate@binkert.org * 66145Snate@binkert.org * Redistribution and use in source and binary forms, with or without 76145Snate@binkert.org * modification, are permitted provided that the following conditions are 86145Snate@binkert.org * met: redistributions of source code must retain the above copyright 96145Snate@binkert.org * notice, this list of conditions and the following disclaimer; 106145Snate@binkert.org * redistributions in binary form must reproduce the above copyright 116145Snate@binkert.org * notice, this list of conditions and the following disclaimer in the 126145Snate@binkert.org * documentation and/or other materials provided with the distribution; 136145Snate@binkert.org * neither the name of the copyright holders nor the names of its 146145Snate@binkert.org * contributors may be used to endorse or promote products derived from 156145Snate@binkert.org * this software without specific prior written permission. 166145Snate@binkert.org * 176145Snate@binkert.org * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 186145Snate@binkert.org * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 196145Snate@binkert.org * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 206145Snate@binkert.org * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 216145Snate@binkert.org * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 226145Snate@binkert.org * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 236145Snate@binkert.org * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 246145Snate@binkert.org * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 256145Snate@binkert.org * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 266145Snate@binkert.org * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 276145Snate@binkert.org * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 286145Snate@binkert.org */ 296145Snate@binkert.org 306845Sdrh5@cs.wisc.edu#include "mem/ruby/libruby.hh" 316154Snate@binkert.org#include "mem/ruby/common/Global.hh" 326154Snate@binkert.org#include "mem/ruby/system/Sequencer.hh" 336154Snate@binkert.org#include "mem/ruby/system/System.hh" 346154Snate@binkert.org#include "mem/protocol/Protocol.hh" 356154Snate@binkert.org#include "mem/ruby/profiler/Profiler.hh" 366154Snate@binkert.org#include "mem/ruby/system/CacheMemory.hh" 376285Snate@binkert.org#include "mem/protocol/CacheMsg.hh" 386285Snate@binkert.org#include "mem/ruby/recorder/Tracer.hh" 396154Snate@binkert.org#include "mem/ruby/common/SubBlock.hh" 406154Snate@binkert.org#include "mem/protocol/Protocol.hh" 416154Snate@binkert.org#include "mem/gems_common/Map.hh" 426285Snate@binkert.org#include "mem/ruby/buffers/MessageBuffer.hh" 436285Snate@binkert.org#include "mem/ruby/slicc_interface/AbstractController.hh" 446145Snate@binkert.org 456876Ssteve.reinhardt@amd.com#include "params/RubySequencer.hh" 466876Ssteve.reinhardt@amd.com 476285Snate@binkert.org//Sequencer::Sequencer(int core_id, MessageBuffer* mandatory_q) 486145Snate@binkert.org 496355Spdudnik@gmail.com#define LLSC_FAIL -2 506850Spdudnik@gmail.comlong int already = 0; 516876Ssteve.reinhardt@amd.com 526876Ssteve.reinhardt@amd.comSequencer * 536876Ssteve.reinhardt@amd.comRubySequencerParams::create() 546285Snate@binkert.org{ 556876Ssteve.reinhardt@amd.com return new Sequencer(this); 566285Snate@binkert.org} 576876Ssteve.reinhardt@amd.com 586876Ssteve.reinhardt@amd.comSequencer::Sequencer(const Params *p) 596886SBrad.Beckmann@amd.com : RubyPort(p), deadlockCheckEvent(this) 606876Ssteve.reinhardt@amd.com{ 616876Ssteve.reinhardt@amd.com m_store_waiting_on_load_cycles = 0; 626876Ssteve.reinhardt@amd.com m_store_waiting_on_store_cycles = 0; 636876Ssteve.reinhardt@amd.com m_load_waiting_on_store_cycles = 0; 646876Ssteve.reinhardt@amd.com m_load_waiting_on_load_cycles = 0; 656876Ssteve.reinhardt@amd.com 666876Ssteve.reinhardt@amd.com m_outstanding_count = 0; 676285Snate@binkert.org 686876Ssteve.reinhardt@amd.com m_max_outstanding_requests = 0; 696876Ssteve.reinhardt@amd.com m_deadlock_threshold = 0; 706876Ssteve.reinhardt@amd.com m_instCache_ptr = NULL; 716876Ssteve.reinhardt@amd.com m_dataCache_ptr = NULL; 726145Snate@binkert.org 736876Ssteve.reinhardt@amd.com m_instCache_ptr = p->icache; 746876Ssteve.reinhardt@amd.com m_dataCache_ptr = p->dcache; 756876Ssteve.reinhardt@amd.com m_max_outstanding_requests = p->max_outstanding_requests; 766876Ssteve.reinhardt@amd.com m_deadlock_threshold = p->deadlock_threshold; 776876Ssteve.reinhardt@amd.com 786876Ssteve.reinhardt@amd.com assert(m_max_outstanding_requests > 0); 796876Ssteve.reinhardt@amd.com assert(m_deadlock_threshold > 0); 806876Ssteve.reinhardt@amd.com assert(m_instCache_ptr != NULL); 816876Ssteve.reinhardt@amd.com assert(m_dataCache_ptr != NULL); 826145Snate@binkert.org} 836145Snate@binkert.org 846145Snate@binkert.orgSequencer::~Sequencer() { 856285Snate@binkert.org 866145Snate@binkert.org} 876145Snate@binkert.org 886145Snate@binkert.orgvoid Sequencer::wakeup() { 896145Snate@binkert.org // Check for deadlock of any of the requests 906145Snate@binkert.org Time current_time = g_eventQueue_ptr->getTime(); 916145Snate@binkert.org 926145Snate@binkert.org // Check across all outstanding requests 936145Snate@binkert.org int total_outstanding = 0; 946285Snate@binkert.org 956285Snate@binkert.org Vector<Address> keys = m_readRequestTable.keys(); 966285Snate@binkert.org for (int i=0; i<keys.size(); i++) { 976285Snate@binkert.org SequencerRequest* request = m_readRequestTable.lookup(keys[i]); 986285Snate@binkert.org if (current_time - request->issue_time >= m_deadlock_threshold) { 996285Snate@binkert.org WARN_MSG("Possible Deadlock detected"); 1006510Spdudnik@gmail.com WARN_EXPR(request); 1016285Snate@binkert.org WARN_EXPR(m_version); 1026825Spdudnik@gmail.com WARN_EXPR(request->ruby_request.paddr); 1036285Snate@binkert.org WARN_EXPR(keys.size()); 1046285Snate@binkert.org WARN_EXPR(current_time); 1056285Snate@binkert.org WARN_EXPR(request->issue_time); 1066285Snate@binkert.org WARN_EXPR(current_time - request->issue_time); 1076285Snate@binkert.org ERROR_MSG("Aborting"); 1086145Snate@binkert.org } 1096285Snate@binkert.org } 1106145Snate@binkert.org 1116285Snate@binkert.org keys = m_writeRequestTable.keys(); 1126285Snate@binkert.org for (int i=0; i<keys.size(); i++) { 1136285Snate@binkert.org SequencerRequest* request = m_writeRequestTable.lookup(keys[i]); 1146285Snate@binkert.org if (current_time - request->issue_time >= m_deadlock_threshold) { 1156285Snate@binkert.org WARN_MSG("Possible Deadlock detected"); 1166510Spdudnik@gmail.com WARN_EXPR(request); 1176285Snate@binkert.org WARN_EXPR(m_version); 1186285Snate@binkert.org WARN_EXPR(current_time); 1196285Snate@binkert.org WARN_EXPR(request->issue_time); 1206285Snate@binkert.org WARN_EXPR(current_time - request->issue_time); 1216285Snate@binkert.org WARN_EXPR(keys.size()); 1226285Snate@binkert.org ERROR_MSG("Aborting"); 1236145Snate@binkert.org } 1246285Snate@binkert.org } 1256285Snate@binkert.org total_outstanding += m_writeRequestTable.size() + m_readRequestTable.size(); 1266285Snate@binkert.org 1276145Snate@binkert.org assert(m_outstanding_count == total_outstanding); 1286145Snate@binkert.org 1296145Snate@binkert.org if (m_outstanding_count > 0) { // If there are still outstanding requests, keep checking 1306886SBrad.Beckmann@amd.com schedule(deadlockCheckEvent, 1316886SBrad.Beckmann@amd.com (m_deadlock_threshold * g_eventQueue_ptr->getClock()) + curTick); 1326145Snate@binkert.org } 1336145Snate@binkert.org} 1346145Snate@binkert.org 1356859Sdrh5@cs.wisc.eduvoid Sequencer::printStats(ostream & out) const { 1366859Sdrh5@cs.wisc.edu out << "Sequencer: " << m_name << endl; 1376859Sdrh5@cs.wisc.edu out << " store_waiting_on_load_cycles: " << m_store_waiting_on_load_cycles << endl; 1386859Sdrh5@cs.wisc.edu out << " store_waiting_on_store_cycles: " << m_store_waiting_on_store_cycles << endl; 1396859Sdrh5@cs.wisc.edu out << " load_waiting_on_load_cycles: " << m_load_waiting_on_load_cycles << endl; 1406859Sdrh5@cs.wisc.edu out << " load_waiting_on_store_cycles: " << m_load_waiting_on_store_cycles << endl; 1416859Sdrh5@cs.wisc.edu} 1426859Sdrh5@cs.wisc.edu 1436145Snate@binkert.orgvoid Sequencer::printProgress(ostream& out) const{ 1446285Snate@binkert.org /* 1456145Snate@binkert.org int total_demand = 0; 1466145Snate@binkert.org out << "Sequencer Stats Version " << m_version << endl; 1476145Snate@binkert.org out << "Current time = " << g_eventQueue_ptr->getTime() << endl; 1486145Snate@binkert.org out << "---------------" << endl; 1496145Snate@binkert.org out << "outstanding requests" << endl; 1506145Snate@binkert.org 1516285Snate@binkert.org Vector<Address> rkeys = m_readRequestTable.keys(); 1526285Snate@binkert.org int read_size = rkeys.size(); 1536285Snate@binkert.org out << "proc " << m_version << " Read Requests = " << read_size << endl; 1546285Snate@binkert.org // print the request table 1556285Snate@binkert.org for(int i=0; i < read_size; ++i){ 1566285Snate@binkert.org SequencerRequest * request = m_readRequestTable.lookup(rkeys[i]); 1576285Snate@binkert.org out << "\tRequest[ " << i << " ] = " << request->type << " Address " << rkeys[i] << " Posted " << request->issue_time << " PF " << PrefetchBit_No << endl; 1586285Snate@binkert.org total_demand++; 1596285Snate@binkert.org } 1606145Snate@binkert.org 1616285Snate@binkert.org Vector<Address> wkeys = m_writeRequestTable.keys(); 1626285Snate@binkert.org int write_size = wkeys.size(); 1636285Snate@binkert.org out << "proc " << m_version << " Write Requests = " << write_size << endl; 1646285Snate@binkert.org // print the request table 1656285Snate@binkert.org for(int i=0; i < write_size; ++i){ 1666285Snate@binkert.org CacheMsg & request = m_writeRequestTable.lookup(wkeys[i]); 1676145Snate@binkert.org out << "\tRequest[ " << i << " ] = " << request.getType() << " Address " << wkeys[i] << " Posted " << request.getTime() << " PF " << request.getPrefetch() << endl; 1686145Snate@binkert.org if( request.getPrefetch() == PrefetchBit_No ){ 1696145Snate@binkert.org total_demand++; 1706145Snate@binkert.org } 1716285Snate@binkert.org } 1726145Snate@binkert.org 1736285Snate@binkert.org out << endl; 1746285Snate@binkert.org 1756145Snate@binkert.org out << "Total Number Outstanding: " << m_outstanding_count << endl; 1766145Snate@binkert.org out << "Total Number Demand : " << total_demand << endl; 1776145Snate@binkert.org out << "Total Number Prefetches : " << m_outstanding_count - total_demand << endl; 1786145Snate@binkert.org out << endl; 1796145Snate@binkert.org out << endl; 1806285Snate@binkert.org */ 1816145Snate@binkert.org} 1826145Snate@binkert.org 1836285Snate@binkert.orgvoid Sequencer::printConfig(ostream& out) const { 1846285Snate@binkert.org out << "Seqeuncer config: " << m_name << endl; 1856285Snate@binkert.org out << " controller: " << m_controller->getName() << endl; 1866285Snate@binkert.org out << " version: " << m_version << endl; 1876285Snate@binkert.org out << " max_outstanding_requests: " << m_max_outstanding_requests << endl; 1886285Snate@binkert.org out << " deadlock_threshold: " << m_deadlock_threshold << endl; 1896145Snate@binkert.org} 1906145Snate@binkert.org 1916145Snate@binkert.org// Insert the request on the correct request table. Return true if 1926145Snate@binkert.org// the entry was already present. 1936285Snate@binkert.orgbool Sequencer::insertRequest(SequencerRequest* request) { 1946285Snate@binkert.org int total_outstanding = m_writeRequestTable.size() + m_readRequestTable.size(); 1956285Snate@binkert.org 1966145Snate@binkert.org assert(m_outstanding_count == total_outstanding); 1976145Snate@binkert.org 1986145Snate@binkert.org // See if we should schedule a deadlock check 1996886SBrad.Beckmann@amd.com if (deadlockCheckEvent.scheduled() == false) { 2006886SBrad.Beckmann@amd.com schedule(deadlockCheckEvent, m_deadlock_threshold); 2016145Snate@binkert.org } 2026145Snate@binkert.org 2036285Snate@binkert.org Address line_addr(request->ruby_request.paddr); 2046285Snate@binkert.org line_addr.makeLineAddress(); 2056285Snate@binkert.org if ((request->ruby_request.type == RubyRequestType_ST) || 2066355Spdudnik@gmail.com (request->ruby_request.type == RubyRequestType_RMW_Read) || 2076355Spdudnik@gmail.com (request->ruby_request.type == RubyRequestType_RMW_Write) || 2086350Spdudnik@gmail.com (request->ruby_request.type == RubyRequestType_Locked_Read) || 2096350Spdudnik@gmail.com (request->ruby_request.type == RubyRequestType_Locked_Write)) { 2106285Snate@binkert.org if (m_writeRequestTable.exist(line_addr)) { 2116285Snate@binkert.org m_writeRequestTable.lookup(line_addr) = request; 2126285Snate@binkert.org // return true; 2136285Snate@binkert.org assert(0); // drh5: isn't this an error? do you lose the initial request? 2146145Snate@binkert.org } 2156285Snate@binkert.org m_writeRequestTable.allocate(line_addr); 2166285Snate@binkert.org m_writeRequestTable.lookup(line_addr) = request; 2176145Snate@binkert.org m_outstanding_count++; 2186145Snate@binkert.org } else { 2196285Snate@binkert.org if (m_readRequestTable.exist(line_addr)) { 2206285Snate@binkert.org m_readRequestTable.lookup(line_addr) = request; 2216285Snate@binkert.org // return true; 2226285Snate@binkert.org assert(0); // drh5: isn't this an error? do you lose the initial request? 2236145Snate@binkert.org } 2246285Snate@binkert.org m_readRequestTable.allocate(line_addr); 2256285Snate@binkert.org m_readRequestTable.lookup(line_addr) = request; 2266145Snate@binkert.org m_outstanding_count++; 2276145Snate@binkert.org } 2286145Snate@binkert.org 2296145Snate@binkert.org g_system_ptr->getProfiler()->sequencerRequests(m_outstanding_count); 2306145Snate@binkert.org 2316285Snate@binkert.org total_outstanding = m_writeRequestTable.size() + m_readRequestTable.size(); 2326285Snate@binkert.org assert(m_outstanding_count == total_outstanding); 2336145Snate@binkert.org 2346145Snate@binkert.org return false; 2356145Snate@binkert.org} 2366145Snate@binkert.org 2376285Snate@binkert.orgvoid Sequencer::removeRequest(SequencerRequest* srequest) { 2386145Snate@binkert.org 2396285Snate@binkert.org assert(m_outstanding_count == m_writeRequestTable.size() + m_readRequestTable.size()); 2406285Snate@binkert.org 2416285Snate@binkert.org const RubyRequest & ruby_request = srequest->ruby_request; 2426285Snate@binkert.org Address line_addr(ruby_request.paddr); 2436285Snate@binkert.org line_addr.makeLineAddress(); 2446285Snate@binkert.org if ((ruby_request.type == RubyRequestType_ST) || 2456355Spdudnik@gmail.com (ruby_request.type == RubyRequestType_RMW_Read) || 2466355Spdudnik@gmail.com (ruby_request.type == RubyRequestType_RMW_Write) || 2476350Spdudnik@gmail.com (ruby_request.type == RubyRequestType_Locked_Read) || 2486350Spdudnik@gmail.com (ruby_request.type == RubyRequestType_Locked_Write)) { 2496285Snate@binkert.org m_writeRequestTable.deallocate(line_addr); 2506145Snate@binkert.org } else { 2516285Snate@binkert.org m_readRequestTable.deallocate(line_addr); 2526145Snate@binkert.org } 2536145Snate@binkert.org m_outstanding_count--; 2546145Snate@binkert.org 2556285Snate@binkert.org assert(m_outstanding_count == m_writeRequestTable.size() + m_readRequestTable.size()); 2566145Snate@binkert.org} 2576145Snate@binkert.org 2586145Snate@binkert.orgvoid Sequencer::writeCallback(const Address& address, DataBlock& data) { 2596145Snate@binkert.org 2606145Snate@binkert.org assert(address == line_address(address)); 2616285Snate@binkert.org assert(m_writeRequestTable.exist(line_address(address))); 2626145Snate@binkert.org 2636285Snate@binkert.org SequencerRequest* request = m_writeRequestTable.lookup(address); 2646846Spdudnik@cs.wisc.edu 2656145Snate@binkert.org removeRequest(request); 2666145Snate@binkert.org 2676285Snate@binkert.org assert((request->ruby_request.type == RubyRequestType_ST) || 2686355Spdudnik@gmail.com (request->ruby_request.type == RubyRequestType_RMW_Read) || 2696355Spdudnik@gmail.com (request->ruby_request.type == RubyRequestType_RMW_Write) || 2706350Spdudnik@gmail.com (request->ruby_request.type == RubyRequestType_Locked_Read) || 2716350Spdudnik@gmail.com (request->ruby_request.type == RubyRequestType_Locked_Write)); 2726863Sdrh5@cs.wisc.edu 2736350Spdudnik@gmail.com if (request->ruby_request.type == RubyRequestType_Locked_Read) { 2746347Spdudnik@gmail.com m_dataCache_ptr->setLocked(address, m_version); 2756347Spdudnik@gmail.com } 2766506Spdudnik@gmail.com else if (request->ruby_request.type == RubyRequestType_RMW_Read) { 2776863Sdrh5@cs.wisc.edu m_controller->blockOnQueue(address, m_mandatory_q_ptr); 2786506Spdudnik@gmail.com } 2796506Spdudnik@gmail.com else if (request->ruby_request.type == RubyRequestType_RMW_Write) { 2806863Sdrh5@cs.wisc.edu m_controller->unblock(address); 2816506Spdudnik@gmail.com } 2826145Snate@binkert.org 2836285Snate@binkert.org hitCallback(request, data); 2846145Snate@binkert.org} 2856145Snate@binkert.org 2866145Snate@binkert.orgvoid Sequencer::readCallback(const Address& address, DataBlock& data) { 2876145Snate@binkert.org 2886285Snate@binkert.org assert(address == line_address(address)); 2896285Snate@binkert.org assert(m_readRequestTable.exist(line_address(address))); 2906145Snate@binkert.org 2916285Snate@binkert.org SequencerRequest* request = m_readRequestTable.lookup(address); 2926285Snate@binkert.org removeRequest(request); 2936285Snate@binkert.org 2946285Snate@binkert.org assert((request->ruby_request.type == RubyRequestType_LD) || 2956381Sdrh5@cs.wisc.edu (request->ruby_request.type == RubyRequestType_RMW_Read) || 2966285Snate@binkert.org (request->ruby_request.type == RubyRequestType_IFETCH)); 2976285Snate@binkert.org 2986285Snate@binkert.org hitCallback(request, data); 2996145Snate@binkert.org} 3006145Snate@binkert.org 3016285Snate@binkert.orgvoid Sequencer::hitCallback(SequencerRequest* srequest, DataBlock& data) { 3026285Snate@binkert.org const RubyRequest & ruby_request = srequest->ruby_request; 3036285Snate@binkert.org Address request_address(ruby_request.paddr); 3046285Snate@binkert.org Address request_line_address(ruby_request.paddr); 3056285Snate@binkert.org request_line_address.makeLineAddress(); 3066285Snate@binkert.org RubyRequestType type = ruby_request.type; 3076285Snate@binkert.org Time issued_time = srequest->issue_time; 3086145Snate@binkert.org 3096145Snate@binkert.org // Set this cache entry to the most recently used 3106285Snate@binkert.org if (type == RubyRequestType_IFETCH) { 3116285Snate@binkert.org if (m_instCache_ptr->isTagPresent(request_line_address) ) 3126285Snate@binkert.org m_instCache_ptr->setMRU(request_line_address); 3136145Snate@binkert.org } else { 3146285Snate@binkert.org if (m_dataCache_ptr->isTagPresent(request_line_address) ) 3156285Snate@binkert.org m_dataCache_ptr->setMRU(request_line_address); 3166145Snate@binkert.org } 3176145Snate@binkert.org 3186145Snate@binkert.org assert(g_eventQueue_ptr->getTime() >= issued_time); 3196145Snate@binkert.org Time miss_latency = g_eventQueue_ptr->getTime() - issued_time; 3206145Snate@binkert.org 3216285Snate@binkert.org // Profile the miss latency for all non-zero demand misses 3226285Snate@binkert.org if (miss_latency != 0) { 3236285Snate@binkert.org g_system_ptr->getProfiler()->missLatency(miss_latency, type); 3246285Snate@binkert.org 3256285Snate@binkert.org if (Debug::getProtocolTrace()) { 3266285Snate@binkert.org g_system_ptr->getProfiler()->profileTransition("Seq", m_version, Address(ruby_request.paddr), 3276285Snate@binkert.org "", "Done", "", int_to_string(miss_latency)+" cycles"); 3286285Snate@binkert.org } 3296285Snate@binkert.org } 3306285Snate@binkert.org /* 3316285Snate@binkert.org if (request.getPrefetch() == PrefetchBit_Yes) { 3326285Snate@binkert.org return; // Ignore the prefetch 3336285Snate@binkert.org } 3346285Snate@binkert.org */ 3356285Snate@binkert.org 3366285Snate@binkert.org // update the data 3376285Snate@binkert.org if (ruby_request.data != NULL) { 3386285Snate@binkert.org if ((type == RubyRequestType_LD) || 3396381Sdrh5@cs.wisc.edu (type == RubyRequestType_IFETCH) || 3406381Sdrh5@cs.wisc.edu (type == RubyRequestType_RMW_Read)) { 3416285Snate@binkert.org memcpy(ruby_request.data, data.getData(request_address.getOffset(), ruby_request.len), ruby_request.len); 3426285Snate@binkert.org } else { 3436285Snate@binkert.org data.setData(ruby_request.data, request_address.getOffset(), ruby_request.len); 3446285Snate@binkert.org } 3456145Snate@binkert.org } 3466145Snate@binkert.org 3476285Snate@binkert.org m_hit_callback(srequest->id); 3486285Snate@binkert.org delete srequest; 3496285Snate@binkert.org} 3506285Snate@binkert.org 3516285Snate@binkert.org// Returns true if the sequencer already has a load or store outstanding 3526845Sdrh5@cs.wisc.eduint Sequencer::isReady(const RubyRequest& request) { 3536859Sdrh5@cs.wisc.edu bool is_outstanding_store = m_writeRequestTable.exist(line_address(Address(request.paddr))); 3546859Sdrh5@cs.wisc.edu bool is_outstanding_load = m_readRequestTable.exist(line_address(Address(request.paddr))); 3556859Sdrh5@cs.wisc.edu if ( is_outstanding_store ) { 3566859Sdrh5@cs.wisc.edu if ((request.type == RubyRequestType_LD) || 3576859Sdrh5@cs.wisc.edu (request.type == RubyRequestType_IFETCH) || 3586859Sdrh5@cs.wisc.edu (request.type == RubyRequestType_RMW_Read)) { 3596859Sdrh5@cs.wisc.edu m_store_waiting_on_load_cycles++; 3606859Sdrh5@cs.wisc.edu } else { 3616859Sdrh5@cs.wisc.edu m_store_waiting_on_store_cycles++; 3626859Sdrh5@cs.wisc.edu } 3636859Sdrh5@cs.wisc.edu return LIBRUBY_ALIASED_REQUEST; 3646859Sdrh5@cs.wisc.edu } else if ( is_outstanding_load ) { 3656859Sdrh5@cs.wisc.edu if ((request.type == RubyRequestType_ST) || 3666859Sdrh5@cs.wisc.edu (request.type == RubyRequestType_RMW_Write) ) { 3676859Sdrh5@cs.wisc.edu m_load_waiting_on_store_cycles++; 3686859Sdrh5@cs.wisc.edu } else { 3696859Sdrh5@cs.wisc.edu m_load_waiting_on_load_cycles++; 3706859Sdrh5@cs.wisc.edu } 3716856Sdrh5@cs.wisc.edu return LIBRUBY_ALIASED_REQUEST; 3726145Snate@binkert.org } 3736145Snate@binkert.org 3746510Spdudnik@gmail.com if (m_outstanding_count >= m_max_outstanding_requests) { 3756845Sdrh5@cs.wisc.edu return LIBRUBY_BUFFER_FULL; 3766145Snate@binkert.org } 3776845Sdrh5@cs.wisc.edu 3786845Sdrh5@cs.wisc.edu return 1; 3796145Snate@binkert.org} 3806145Snate@binkert.org 3816285Snate@binkert.orgbool Sequencer::empty() const { 3826285Snate@binkert.org return (m_writeRequestTable.size() == 0) && (m_readRequestTable.size() == 0); 3836145Snate@binkert.org} 3846145Snate@binkert.org 3856349Spdudnik@gmail.com 3866285Snate@binkert.orgint64_t Sequencer::makeRequest(const RubyRequest & request) 3876285Snate@binkert.org{ 3886285Snate@binkert.org assert(Address(request.paddr).getOffset() + request.len <= RubySystem::getBlockSizeBytes()); 3896845Sdrh5@cs.wisc.edu int ready = isReady(request); 3906845Sdrh5@cs.wisc.edu if (ready > 0) { 3916285Snate@binkert.org int64_t id = makeUniqueRequestID(); 3926285Snate@binkert.org SequencerRequest *srequest = new SequencerRequest(request, id, g_eventQueue_ptr->getTime()); 3936285Snate@binkert.org bool found = insertRequest(srequest); 3946825Spdudnik@gmail.com if (!found) { 3956350Spdudnik@gmail.com if (request.type == RubyRequestType_Locked_Write) { 3966355Spdudnik@gmail.com // NOTE: it is OK to check the locked flag here as the mandatory queue will be checked first 3976355Spdudnik@gmail.com // ensuring that nothing comes between checking the flag and servicing the store 3986349Spdudnik@gmail.com if (!m_dataCache_ptr->isLocked(line_address(Address(request.paddr)), m_version)) { 3996355Spdudnik@gmail.com return LLSC_FAIL; 4006349Spdudnik@gmail.com } 4016349Spdudnik@gmail.com else { 4026349Spdudnik@gmail.com m_dataCache_ptr->clearLocked(line_address(Address(request.paddr))); 4036349Spdudnik@gmail.com } 4046349Spdudnik@gmail.com } 4056285Snate@binkert.org issueRequest(request); 4066145Snate@binkert.org 4076859Sdrh5@cs.wisc.edu // TODO: issue hardware prefetches here 4086859Sdrh5@cs.wisc.edu return id; 4096825Spdudnik@gmail.com } 4106825Spdudnik@gmail.com else { 4116825Spdudnik@gmail.com assert(0); 4126859Sdrh5@cs.wisc.edu return 0; 4136825Spdudnik@gmail.com } 4146859Sdrh5@cs.wisc.edu } else { 4156845Sdrh5@cs.wisc.edu return ready; 4166145Snate@binkert.org } 4176145Snate@binkert.org} 4186145Snate@binkert.org 4196285Snate@binkert.orgvoid Sequencer::issueRequest(const RubyRequest& request) { 4206285Snate@binkert.org 4216285Snate@binkert.org // TODO: get rid of CacheMsg, CacheRequestType, and AccessModeTYpe, & have SLICC use RubyRequest and subtypes natively 4226285Snate@binkert.org CacheRequestType ctype; 4236285Snate@binkert.org switch(request.type) { 4246285Snate@binkert.org case RubyRequestType_IFETCH: 4256285Snate@binkert.org ctype = CacheRequestType_IFETCH; 4266285Snate@binkert.org break; 4276285Snate@binkert.org case RubyRequestType_LD: 4286285Snate@binkert.org ctype = CacheRequestType_LD; 4296285Snate@binkert.org break; 4306285Snate@binkert.org case RubyRequestType_ST: 4316285Snate@binkert.org ctype = CacheRequestType_ST; 4326285Snate@binkert.org break; 4336350Spdudnik@gmail.com case RubyRequestType_Locked_Read: 4346350Spdudnik@gmail.com case RubyRequestType_Locked_Write: 4356846Spdudnik@cs.wisc.edu ctype = CacheRequestType_ATOMIC; 4366285Snate@binkert.org break; 4376355Spdudnik@gmail.com case RubyRequestType_RMW_Read: 4386355Spdudnik@gmail.com ctype = CacheRequestType_ATOMIC; 4396355Spdudnik@gmail.com break; 4406355Spdudnik@gmail.com case RubyRequestType_RMW_Write: 4416355Spdudnik@gmail.com ctype = CacheRequestType_ATOMIC; 4426355Spdudnik@gmail.com break; 4436285Snate@binkert.org default: 4446285Snate@binkert.org assert(0); 4456145Snate@binkert.org } 4466285Snate@binkert.org AccessModeType amtype; 4476285Snate@binkert.org switch(request.access_mode){ 4486285Snate@binkert.org case RubyAccessMode_User: 4496285Snate@binkert.org amtype = AccessModeType_UserMode; 4506285Snate@binkert.org break; 4516285Snate@binkert.org case RubyAccessMode_Supervisor: 4526285Snate@binkert.org amtype = AccessModeType_SupervisorMode; 4536285Snate@binkert.org break; 4546285Snate@binkert.org case RubyAccessMode_Device: 4556285Snate@binkert.org amtype = AccessModeType_UserMode; 4566285Snate@binkert.org break; 4576285Snate@binkert.org default: 4586285Snate@binkert.org assert(0); 4596285Snate@binkert.org } 4606285Snate@binkert.org Address line_addr(request.paddr); 4616285Snate@binkert.org line_addr.makeLineAddress(); 4626505Spdudnik@gmail.com CacheMsg msg(line_addr, Address(request.paddr), ctype, Address(request.pc), amtype, request.len, PrefetchBit_No, request.proc_id); 4636285Snate@binkert.org 4646285Snate@binkert.org if (Debug::getProtocolTrace()) { 4656285Snate@binkert.org g_system_ptr->getProfiler()->profileTransition("Seq", m_version, Address(request.paddr), 4666285Snate@binkert.org "", "Begin", "", RubyRequestType_to_string(request.type)); 4676285Snate@binkert.org } 4686285Snate@binkert.org 4696285Snate@binkert.org if (g_system_ptr->getTracer()->traceEnabled()) { 4706285Snate@binkert.org g_system_ptr->getTracer()->traceRequest(m_name, line_addr, Address(request.pc), 4716285Snate@binkert.org request.type, g_eventQueue_ptr->getTime()); 4726285Snate@binkert.org } 4736285Snate@binkert.org 4746285Snate@binkert.org Time latency = 0; // initialzed to an null value 4756285Snate@binkert.org 4766285Snate@binkert.org if (request.type == RubyRequestType_IFETCH) 4776285Snate@binkert.org latency = m_instCache_ptr->getLatency(); 4786285Snate@binkert.org else 4796285Snate@binkert.org latency = m_dataCache_ptr->getLatency(); 4806285Snate@binkert.org 4816285Snate@binkert.org // Send the message to the cache controller 4826285Snate@binkert.org assert(latency > 0); 4836285Snate@binkert.org 4846876Ssteve.reinhardt@amd.com assert(m_mandatory_q_ptr != NULL); 4856285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg, latency); 4866285Snate@binkert.org} 4876285Snate@binkert.org/* 4886285Snate@binkert.orgbool Sequencer::tryCacheAccess(const Address& addr, CacheRequestType type, 4896285Snate@binkert.org AccessModeType access_mode, 4906285Snate@binkert.org int size, DataBlock*& data_ptr) { 4916285Snate@binkert.org if (type == CacheRequestType_IFETCH) { 4926285Snate@binkert.org return m_instCache_ptr->tryCacheAccess(line_address(addr), type, data_ptr); 4936285Snate@binkert.org } else { 4946285Snate@binkert.org return m_dataCache_ptr->tryCacheAccess(line_address(addr), type, data_ptr); 4956145Snate@binkert.org } 4966145Snate@binkert.org} 4976285Snate@binkert.org*/ 4986145Snate@binkert.org 4996145Snate@binkert.orgvoid Sequencer::print(ostream& out) const { 5006285Snate@binkert.org out << "[Sequencer: " << m_version 5016145Snate@binkert.org << ", outstanding requests: " << m_outstanding_count; 5026145Snate@binkert.org 5036285Snate@binkert.org out << ", read request table: " << m_readRequestTable 5046285Snate@binkert.org << ", write request table: " << m_writeRequestTable; 5056145Snate@binkert.org out << "]"; 5066145Snate@binkert.org} 5076145Snate@binkert.org 5086145Snate@binkert.org// this can be called from setState whenever coherence permissions are upgraded 5096145Snate@binkert.org// when invoked, coherence violations will be checked for the given block 5106145Snate@binkert.orgvoid Sequencer::checkCoherence(const Address& addr) { 5116145Snate@binkert.org#ifdef CHECK_COHERENCE 5126145Snate@binkert.org g_system_ptr->checkGlobalCoherenceInvariant(addr); 5136145Snate@binkert.org#endif 5146145Snate@binkert.org} 5156145Snate@binkert.org 516