DMASequencer.cc revision 6467
16285Snate@binkert.org 26285Snate@binkert.org#include "mem/ruby/system/DMASequencer.hh" 36285Snate@binkert.org#include "mem/ruby/buffers/MessageBuffer.hh" 46285Snate@binkert.org#include "mem/ruby/slicc_interface/AbstractController.hh" 56285Snate@binkert.org 66285Snate@binkert.org/* SLICC generated types */ 76467Sdrh5@cs.wisc.edu#include "mem/protocol/SequencerMsg.hh" 86467Sdrh5@cs.wisc.edu#include "mem/protocol/SequencerRequestType.hh" 96285Snate@binkert.org#include "mem/ruby/system/System.hh" 106285Snate@binkert.org 116285Snate@binkert.orgDMASequencer::DMASequencer(const string & name) 126285Snate@binkert.org : RubyPort(name) 136285Snate@binkert.org{ 146285Snate@binkert.org} 156285Snate@binkert.org 166285Snate@binkert.orgvoid DMASequencer::init(const vector<string> & argv) 176285Snate@binkert.org{ 186285Snate@binkert.org m_version = -1; 196285Snate@binkert.org m_controller = NULL; 206285Snate@binkert.org for (size_t i=0;i<argv.size();i+=2) { 216285Snate@binkert.org if (argv[i] == "controller") 226285Snate@binkert.org m_controller = RubySystem::getController(argv[i+1]); 236285Snate@binkert.org else if (argv[i] == "version") 246285Snate@binkert.org m_version = atoi(argv[i+1].c_str()); 256285Snate@binkert.org } 266285Snate@binkert.org assert(m_controller != NULL); 276285Snate@binkert.org assert(m_version != -1); 286285Snate@binkert.org 296285Snate@binkert.org m_mandatory_q_ptr = m_controller->getMandatoryQueue(); 306285Snate@binkert.org m_is_busy = false; 316368Sdrh5@cs.wisc.edu m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits()); 326285Snate@binkert.org} 336285Snate@binkert.org 346285Snate@binkert.orgint64_t DMASequencer::makeRequest(const RubyRequest & request) 356285Snate@binkert.org{ 366285Snate@binkert.org uint64_t paddr = request.paddr; 376285Snate@binkert.org uint8_t* data = request.data; 386285Snate@binkert.org int len = request.len; 396285Snate@binkert.org bool write = false; 406285Snate@binkert.org switch(request.type) { 416285Snate@binkert.org case RubyRequestType_LD: 426285Snate@binkert.org write = false; 436285Snate@binkert.org break; 446285Snate@binkert.org case RubyRequestType_ST: 456285Snate@binkert.org write = true; 466285Snate@binkert.org break; 476285Snate@binkert.org case RubyRequestType_NULL: 486285Snate@binkert.org case RubyRequestType_IFETCH: 496350Spdudnik@gmail.com case RubyRequestType_Locked_Read: 506350Spdudnik@gmail.com case RubyRequestType_Locked_Write: 516355Spdudnik@gmail.com case RubyRequestType_RMW_Read: 526355Spdudnik@gmail.com case RubyRequestType_RMW_Write: 536433Sdrh5@cs.wisc.edu case RubyRequestType_NUM: 546285Snate@binkert.org assert(0); 556285Snate@binkert.org } 566285Snate@binkert.org 576368Sdrh5@cs.wisc.edu assert(!m_is_busy); // only support one outstanding DMA request 586285Snate@binkert.org m_is_busy = true; 596285Snate@binkert.org 606285Snate@binkert.org active_request.start_paddr = paddr; 616285Snate@binkert.org active_request.write = write; 626285Snate@binkert.org active_request.data = data; 636285Snate@binkert.org active_request.len = len; 646285Snate@binkert.org active_request.bytes_completed = 0; 656285Snate@binkert.org active_request.bytes_issued = 0; 666285Snate@binkert.org active_request.id = makeUniqueRequestID(); 676285Snate@binkert.org 686467Sdrh5@cs.wisc.edu SequencerMsg msg; 696285Snate@binkert.org msg.getPhysicalAddress() = Address(paddr); 706368Sdrh5@cs.wisc.edu msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 716467Sdrh5@cs.wisc.edu msg.getType() = write ? SequencerRequestType_ST : SequencerRequestType_LD; 726467Sdrh5@cs.wisc.edu int offset = paddr & m_data_block_mask; 736467Sdrh5@cs.wisc.edu msg.getLen() = (offset + len) <= RubySystem::getBlockSizeBytes() ? 746368Sdrh5@cs.wisc.edu len : 756467Sdrh5@cs.wisc.edu RubySystem::getBlockSizeBytes() - offset; 766467Sdrh5@cs.wisc.edu if (write) 776467Sdrh5@cs.wisc.edu msg.getDataBlk().setData(data, offset, msg.getLen()); 786285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 796285Snate@binkert.org active_request.bytes_issued += msg.getLen(); 806285Snate@binkert.org 816285Snate@binkert.org return active_request.id; 826285Snate@binkert.org} 836285Snate@binkert.org 846285Snate@binkert.orgvoid DMASequencer::issueNext() 856285Snate@binkert.org{ 866285Snate@binkert.org assert(m_is_busy == true); 876285Snate@binkert.org active_request.bytes_completed = active_request.bytes_issued; 886285Snate@binkert.org if (active_request.len == active_request.bytes_completed) { 896285Snate@binkert.org m_hit_callback(active_request.id); 906285Snate@binkert.org m_is_busy = false; 916285Snate@binkert.org return; 926285Snate@binkert.org } 936285Snate@binkert.org 946467Sdrh5@cs.wisc.edu SequencerMsg msg; 956368Sdrh5@cs.wisc.edu msg.getPhysicalAddress() = Address(active_request.start_paddr + 966368Sdrh5@cs.wisc.edu active_request.bytes_completed); 976368Sdrh5@cs.wisc.edu assert((msg.getPhysicalAddress().getAddress() & m_data_block_mask) == 0); 986368Sdrh5@cs.wisc.edu msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 996467Sdrh5@cs.wisc.edu msg.getType() = (active_request.write ? SequencerRequestType_ST : 1006467Sdrh5@cs.wisc.edu SequencerRequestType_LD); 1016368Sdrh5@cs.wisc.edu msg.getLen() = (active_request.len - 1026368Sdrh5@cs.wisc.edu active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? 1036368Sdrh5@cs.wisc.edu active_request.len - active_request.bytes_completed : 1046368Sdrh5@cs.wisc.edu RubySystem::getBlockSizeBytes()); 1056285Snate@binkert.org if (active_request.write) { 1066368Sdrh5@cs.wisc.edu msg.getDataBlk().setData(&active_request.data[active_request.bytes_completed], 1076368Sdrh5@cs.wisc.edu 0, msg.getLen()); 1086467Sdrh5@cs.wisc.edu msg.getType() = SequencerRequestType_ST; 1096285Snate@binkert.org } else { 1106467Sdrh5@cs.wisc.edu msg.getType() = SequencerRequestType_LD; 1116285Snate@binkert.org } 1126285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1136285Snate@binkert.org active_request.bytes_issued += msg.getLen(); 1146285Snate@binkert.org} 1156285Snate@binkert.org 1166285Snate@binkert.orgvoid DMASequencer::dataCallback(const DataBlock & dblk) 1176285Snate@binkert.org{ 1186285Snate@binkert.org assert(m_is_busy == true); 1196285Snate@binkert.org int len = active_request.bytes_issued - active_request.bytes_completed; 1206285Snate@binkert.org int offset = 0; 1216285Snate@binkert.org if (active_request.bytes_completed == 0) 1226368Sdrh5@cs.wisc.edu offset = active_request.start_paddr & m_data_block_mask; 1236368Sdrh5@cs.wisc.edu assert( active_request.write == false ); 1246368Sdrh5@cs.wisc.edu memcpy(&active_request.data[active_request.bytes_completed], 1256368Sdrh5@cs.wisc.edu dblk.getData(offset, len), len); 1266285Snate@binkert.org issueNext(); 1276285Snate@binkert.org} 1286285Snate@binkert.org 1296285Snate@binkert.orgvoid DMASequencer::ackCallback() 1306285Snate@binkert.org{ 1316285Snate@binkert.org issueNext(); 1326285Snate@binkert.org} 1336285Snate@binkert.org 1346285Snate@binkert.orgvoid DMASequencer::printConfig(ostream & out) 1356285Snate@binkert.org{ 1366285Snate@binkert.org 1376285Snate@binkert.org} 138