DMASequencer.cc revision 6876
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 116876Ssteve.reinhardt@amd.comDMASequencer::DMASequencer(const Params *p) 126876Ssteve.reinhardt@amd.com : RubyPort(p) 136285Snate@binkert.org{ 146285Snate@binkert.org} 156285Snate@binkert.org 166876Ssteve.reinhardt@amd.comvoid DMASequencer::init() 176285Snate@binkert.org{ 186285Snate@binkert.org m_is_busy = false; 196368Sdrh5@cs.wisc.edu m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits()); 206285Snate@binkert.org} 216285Snate@binkert.org 226285Snate@binkert.orgint64_t DMASequencer::makeRequest(const RubyRequest & request) 236285Snate@binkert.org{ 246285Snate@binkert.org uint64_t paddr = request.paddr; 256285Snate@binkert.org uint8_t* data = request.data; 266285Snate@binkert.org int len = request.len; 276285Snate@binkert.org bool write = false; 286285Snate@binkert.org switch(request.type) { 296285Snate@binkert.org case RubyRequestType_LD: 306285Snate@binkert.org write = false; 316285Snate@binkert.org break; 326285Snate@binkert.org case RubyRequestType_ST: 336285Snate@binkert.org write = true; 346285Snate@binkert.org break; 356285Snate@binkert.org case RubyRequestType_NULL: 366285Snate@binkert.org case RubyRequestType_IFETCH: 376350Spdudnik@gmail.com case RubyRequestType_Locked_Read: 386350Spdudnik@gmail.com case RubyRequestType_Locked_Write: 396355Spdudnik@gmail.com case RubyRequestType_RMW_Read: 406355Spdudnik@gmail.com case RubyRequestType_RMW_Write: 416433Sdrh5@cs.wisc.edu case RubyRequestType_NUM: 426285Snate@binkert.org assert(0); 436285Snate@binkert.org } 446285Snate@binkert.org 456368Sdrh5@cs.wisc.edu assert(!m_is_busy); // only support one outstanding DMA request 466285Snate@binkert.org m_is_busy = true; 476285Snate@binkert.org 486285Snate@binkert.org active_request.start_paddr = paddr; 496285Snate@binkert.org active_request.write = write; 506285Snate@binkert.org active_request.data = data; 516285Snate@binkert.org active_request.len = len; 526285Snate@binkert.org active_request.bytes_completed = 0; 536285Snate@binkert.org active_request.bytes_issued = 0; 546285Snate@binkert.org active_request.id = makeUniqueRequestID(); 556285Snate@binkert.org 566467Sdrh5@cs.wisc.edu SequencerMsg msg; 576285Snate@binkert.org msg.getPhysicalAddress() = Address(paddr); 586368Sdrh5@cs.wisc.edu msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 596467Sdrh5@cs.wisc.edu msg.getType() = write ? SequencerRequestType_ST : SequencerRequestType_LD; 606467Sdrh5@cs.wisc.edu int offset = paddr & m_data_block_mask; 616467Sdrh5@cs.wisc.edu msg.getLen() = (offset + len) <= RubySystem::getBlockSizeBytes() ? 626368Sdrh5@cs.wisc.edu len : 636467Sdrh5@cs.wisc.edu RubySystem::getBlockSizeBytes() - offset; 646467Sdrh5@cs.wisc.edu if (write) 656467Sdrh5@cs.wisc.edu msg.getDataBlk().setData(data, offset, msg.getLen()); 666285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 676285Snate@binkert.org active_request.bytes_issued += msg.getLen(); 686285Snate@binkert.org 696285Snate@binkert.org return active_request.id; 706285Snate@binkert.org} 716285Snate@binkert.org 726285Snate@binkert.orgvoid DMASequencer::issueNext() 736285Snate@binkert.org{ 746285Snate@binkert.org assert(m_is_busy == true); 756285Snate@binkert.org active_request.bytes_completed = active_request.bytes_issued; 766285Snate@binkert.org if (active_request.len == active_request.bytes_completed) { 776285Snate@binkert.org m_hit_callback(active_request.id); 786285Snate@binkert.org m_is_busy = false; 796285Snate@binkert.org return; 806285Snate@binkert.org } 816285Snate@binkert.org 826467Sdrh5@cs.wisc.edu SequencerMsg msg; 836368Sdrh5@cs.wisc.edu msg.getPhysicalAddress() = Address(active_request.start_paddr + 846368Sdrh5@cs.wisc.edu active_request.bytes_completed); 856368Sdrh5@cs.wisc.edu assert((msg.getPhysicalAddress().getAddress() & m_data_block_mask) == 0); 866368Sdrh5@cs.wisc.edu msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 876467Sdrh5@cs.wisc.edu msg.getType() = (active_request.write ? SequencerRequestType_ST : 886467Sdrh5@cs.wisc.edu SequencerRequestType_LD); 896368Sdrh5@cs.wisc.edu msg.getLen() = (active_request.len - 906368Sdrh5@cs.wisc.edu active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? 916368Sdrh5@cs.wisc.edu active_request.len - active_request.bytes_completed : 926368Sdrh5@cs.wisc.edu RubySystem::getBlockSizeBytes()); 936285Snate@binkert.org if (active_request.write) { 946368Sdrh5@cs.wisc.edu msg.getDataBlk().setData(&active_request.data[active_request.bytes_completed], 956368Sdrh5@cs.wisc.edu 0, msg.getLen()); 966467Sdrh5@cs.wisc.edu msg.getType() = SequencerRequestType_ST; 976285Snate@binkert.org } else { 986467Sdrh5@cs.wisc.edu msg.getType() = SequencerRequestType_LD; 996285Snate@binkert.org } 1006285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1016285Snate@binkert.org active_request.bytes_issued += msg.getLen(); 1026285Snate@binkert.org} 1036285Snate@binkert.org 1046285Snate@binkert.orgvoid DMASequencer::dataCallback(const DataBlock & dblk) 1056285Snate@binkert.org{ 1066285Snate@binkert.org assert(m_is_busy == true); 1076285Snate@binkert.org int len = active_request.bytes_issued - active_request.bytes_completed; 1086285Snate@binkert.org int offset = 0; 1096285Snate@binkert.org if (active_request.bytes_completed == 0) 1106368Sdrh5@cs.wisc.edu offset = active_request.start_paddr & m_data_block_mask; 1116368Sdrh5@cs.wisc.edu assert( active_request.write == false ); 1126368Sdrh5@cs.wisc.edu memcpy(&active_request.data[active_request.bytes_completed], 1136368Sdrh5@cs.wisc.edu dblk.getData(offset, len), len); 1146285Snate@binkert.org issueNext(); 1156285Snate@binkert.org} 1166285Snate@binkert.org 1176285Snate@binkert.orgvoid DMASequencer::ackCallback() 1186285Snate@binkert.org{ 1196285Snate@binkert.org issueNext(); 1206285Snate@binkert.org} 1216285Snate@binkert.org 1226285Snate@binkert.orgvoid DMASequencer::printConfig(ostream & out) 1236285Snate@binkert.org{ 1246285Snate@binkert.org 1256285Snate@binkert.org} 1266876Ssteve.reinhardt@amd.com 1276876Ssteve.reinhardt@amd.com 1286876Ssteve.reinhardt@amd.comDMASequencer * 1296876Ssteve.reinhardt@amd.comDMASequencerParams::create() 1306876Ssteve.reinhardt@amd.com{ 1316876Ssteve.reinhardt@amd.com return new DMASequencer(this); 1326876Ssteve.reinhardt@amd.com} 133