DMASequencer.cc revision 6368
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 */ 76285Snate@binkert.org#include "mem/protocol/DMARequestMsg.hh" 86285Snate@binkert.org#include "mem/protocol/DMARequestType.hh" 96285Snate@binkert.org#include "mem/protocol/DMAResponseMsg.hh" 106285Snate@binkert.org#include "mem/ruby/system/System.hh" 116285Snate@binkert.org 126285Snate@binkert.orgDMASequencer::DMASequencer(const string & name) 136285Snate@binkert.org : RubyPort(name) 146285Snate@binkert.org{ 156285Snate@binkert.org} 166285Snate@binkert.org 176285Snate@binkert.orgvoid DMASequencer::init(const vector<string> & argv) 186285Snate@binkert.org{ 196285Snate@binkert.org m_version = -1; 206285Snate@binkert.org m_controller = NULL; 216285Snate@binkert.org for (size_t i=0;i<argv.size();i+=2) { 226285Snate@binkert.org if (argv[i] == "controller") 236285Snate@binkert.org m_controller = RubySystem::getController(argv[i+1]); 246285Snate@binkert.org else if (argv[i] == "version") 256285Snate@binkert.org m_version = atoi(argv[i+1].c_str()); 266285Snate@binkert.org } 276285Snate@binkert.org assert(m_controller != NULL); 286285Snate@binkert.org assert(m_version != -1); 296285Snate@binkert.org 306285Snate@binkert.org m_mandatory_q_ptr = m_controller->getMandatoryQueue(); 316285Snate@binkert.org m_is_busy = false; 326368Sdrh5@cs.wisc.edu m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits()); 336285Snate@binkert.org} 346285Snate@binkert.org 356285Snate@binkert.orgint64_t DMASequencer::makeRequest(const RubyRequest & request) 366285Snate@binkert.org{ 376285Snate@binkert.org uint64_t paddr = request.paddr; 386285Snate@binkert.org uint8_t* data = request.data; 396285Snate@binkert.org int len = request.len; 406285Snate@binkert.org bool write = false; 416285Snate@binkert.org switch(request.type) { 426285Snate@binkert.org case RubyRequestType_LD: 436285Snate@binkert.org write = false; 446285Snate@binkert.org break; 456285Snate@binkert.org case RubyRequestType_ST: 466285Snate@binkert.org write = true; 476285Snate@binkert.org break; 486285Snate@binkert.org case RubyRequestType_NULL: 496285Snate@binkert.org case RubyRequestType_IFETCH: 506285Snate@binkert.org case RubyRequestType_RMW: 516285Snate@binkert.org assert(0); 526285Snate@binkert.org } 536285Snate@binkert.org 546368Sdrh5@cs.wisc.edu assert(!m_is_busy); // only support one outstanding DMA request 556285Snate@binkert.org m_is_busy = true; 566285Snate@binkert.org 576285Snate@binkert.org active_request.start_paddr = paddr; 586285Snate@binkert.org active_request.write = write; 596285Snate@binkert.org active_request.data = data; 606285Snate@binkert.org active_request.len = len; 616285Snate@binkert.org active_request.bytes_completed = 0; 626285Snate@binkert.org active_request.bytes_issued = 0; 636285Snate@binkert.org active_request.id = makeUniqueRequestID(); 646285Snate@binkert.org 656285Snate@binkert.org DMARequestMsg msg; 666285Snate@binkert.org msg.getPhysicalAddress() = Address(paddr); 676368Sdrh5@cs.wisc.edu msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 686285Snate@binkert.org msg.getType() = write ? DMARequestType_WRITE : DMARequestType_READ; 696368Sdrh5@cs.wisc.edu msg.getOffset() = paddr & m_data_block_mask; 706368Sdrh5@cs.wisc.edu msg.getLen() = (msg.getOffset() + len) <= RubySystem::getBlockSizeBytes() ? 716368Sdrh5@cs.wisc.edu len : 726285Snate@binkert.org RubySystem::getBlockSizeBytes() - msg.getOffset(); 736285Snate@binkert.org if (write) { 746285Snate@binkert.org msg.getType() = DMARequestType_WRITE; 756368Sdrh5@cs.wisc.edu msg.getDataBlk().setData(data, msg.getOffset(), msg.getLen()); 766285Snate@binkert.org } else { 776285Snate@binkert.org msg.getType() = DMARequestType_READ; 786285Snate@binkert.org } 796285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 806285Snate@binkert.org active_request.bytes_issued += msg.getLen(); 816285Snate@binkert.org 826285Snate@binkert.org return active_request.id; 836285Snate@binkert.org} 846285Snate@binkert.org 856285Snate@binkert.orgvoid DMASequencer::issueNext() 866285Snate@binkert.org{ 876285Snate@binkert.org assert(m_is_busy == true); 886285Snate@binkert.org active_request.bytes_completed = active_request.bytes_issued; 896285Snate@binkert.org if (active_request.len == active_request.bytes_completed) { 906285Snate@binkert.org m_hit_callback(active_request.id); 916285Snate@binkert.org m_is_busy = false; 926285Snate@binkert.org return; 936285Snate@binkert.org } 946285Snate@binkert.org 956285Snate@binkert.org DMARequestMsg msg; 966368Sdrh5@cs.wisc.edu msg.getPhysicalAddress() = Address(active_request.start_paddr + 976368Sdrh5@cs.wisc.edu active_request.bytes_completed); 986368Sdrh5@cs.wisc.edu assert((msg.getPhysicalAddress().getAddress() & m_data_block_mask) == 0); 996368Sdrh5@cs.wisc.edu msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 1006285Snate@binkert.org msg.getOffset() = 0; 1016368Sdrh5@cs.wisc.edu msg.getType() = (active_request.write ? DMARequestType_WRITE : 1026368Sdrh5@cs.wisc.edu DMARequestType_READ); 1036368Sdrh5@cs.wisc.edu msg.getLen() = (active_request.len - 1046368Sdrh5@cs.wisc.edu active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? 1056368Sdrh5@cs.wisc.edu active_request.len - active_request.bytes_completed : 1066368Sdrh5@cs.wisc.edu RubySystem::getBlockSizeBytes()); 1076285Snate@binkert.org if (active_request.write) { 1086368Sdrh5@cs.wisc.edu msg.getDataBlk().setData(&active_request.data[active_request.bytes_completed], 1096368Sdrh5@cs.wisc.edu 0, msg.getLen()); 1106285Snate@binkert.org msg.getType() = DMARequestType_WRITE; 1116285Snate@binkert.org } else { 1126285Snate@binkert.org msg.getType() = DMARequestType_READ; 1136285Snate@binkert.org } 1146285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1156285Snate@binkert.org active_request.bytes_issued += msg.getLen(); 1166285Snate@binkert.org} 1176285Snate@binkert.org 1186285Snate@binkert.orgvoid DMASequencer::dataCallback(const DataBlock & dblk) 1196285Snate@binkert.org{ 1206285Snate@binkert.org assert(m_is_busy == true); 1216285Snate@binkert.org int len = active_request.bytes_issued - active_request.bytes_completed; 1226285Snate@binkert.org int offset = 0; 1236285Snate@binkert.org if (active_request.bytes_completed == 0) 1246368Sdrh5@cs.wisc.edu offset = active_request.start_paddr & m_data_block_mask; 1256368Sdrh5@cs.wisc.edu assert( active_request.write == false ); 1266368Sdrh5@cs.wisc.edu memcpy(&active_request.data[active_request.bytes_completed], 1276368Sdrh5@cs.wisc.edu dblk.getData(offset, len), len); 1286285Snate@binkert.org issueNext(); 1296285Snate@binkert.org} 1306285Snate@binkert.org 1316285Snate@binkert.orgvoid DMASequencer::ackCallback() 1326285Snate@binkert.org{ 1336285Snate@binkert.org issueNext(); 1346285Snate@binkert.org} 1356285Snate@binkert.org 1366285Snate@binkert.orgvoid DMASequencer::printConfig(ostream & out) 1376285Snate@binkert.org{ 1386285Snate@binkert.org 1396285Snate@binkert.org} 140