DMASequencer.cc revision 6433
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: 506350Spdudnik@gmail.com case RubyRequestType_Locked_Read: 516350Spdudnik@gmail.com case RubyRequestType_Locked_Write: 526355Spdudnik@gmail.com case RubyRequestType_RMW_Read: 536355Spdudnik@gmail.com case RubyRequestType_RMW_Write: 546433Sdrh5@cs.wisc.edu case RubyRequestType_NUM: 556285Snate@binkert.org assert(0); 566285Snate@binkert.org } 576285Snate@binkert.org 586368Sdrh5@cs.wisc.edu assert(!m_is_busy); // only support one outstanding DMA request 596285Snate@binkert.org m_is_busy = true; 606285Snate@binkert.org 616285Snate@binkert.org active_request.start_paddr = paddr; 626285Snate@binkert.org active_request.write = write; 636285Snate@binkert.org active_request.data = data; 646285Snate@binkert.org active_request.len = len; 656285Snate@binkert.org active_request.bytes_completed = 0; 666285Snate@binkert.org active_request.bytes_issued = 0; 676285Snate@binkert.org active_request.id = makeUniqueRequestID(); 686285Snate@binkert.org 696285Snate@binkert.org DMARequestMsg msg; 706285Snate@binkert.org msg.getPhysicalAddress() = Address(paddr); 716368Sdrh5@cs.wisc.edu msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 726285Snate@binkert.org msg.getType() = write ? DMARequestType_WRITE : DMARequestType_READ; 736368Sdrh5@cs.wisc.edu msg.getOffset() = paddr & m_data_block_mask; 746368Sdrh5@cs.wisc.edu msg.getLen() = (msg.getOffset() + len) <= RubySystem::getBlockSizeBytes() ? 756368Sdrh5@cs.wisc.edu len : 766285Snate@binkert.org RubySystem::getBlockSizeBytes() - msg.getOffset(); 776285Snate@binkert.org if (write) { 786285Snate@binkert.org msg.getType() = DMARequestType_WRITE; 796368Sdrh5@cs.wisc.edu msg.getDataBlk().setData(data, msg.getOffset(), msg.getLen()); 806285Snate@binkert.org } else { 816285Snate@binkert.org msg.getType() = DMARequestType_READ; 826285Snate@binkert.org } 836285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 846285Snate@binkert.org active_request.bytes_issued += msg.getLen(); 856285Snate@binkert.org 866285Snate@binkert.org return active_request.id; 876285Snate@binkert.org} 886285Snate@binkert.org 896285Snate@binkert.orgvoid DMASequencer::issueNext() 906285Snate@binkert.org{ 916285Snate@binkert.org assert(m_is_busy == true); 926285Snate@binkert.org active_request.bytes_completed = active_request.bytes_issued; 936285Snate@binkert.org if (active_request.len == active_request.bytes_completed) { 946285Snate@binkert.org m_hit_callback(active_request.id); 956285Snate@binkert.org m_is_busy = false; 966285Snate@binkert.org return; 976285Snate@binkert.org } 986285Snate@binkert.org 996285Snate@binkert.org DMARequestMsg msg; 1006368Sdrh5@cs.wisc.edu msg.getPhysicalAddress() = Address(active_request.start_paddr + 1016368Sdrh5@cs.wisc.edu active_request.bytes_completed); 1026368Sdrh5@cs.wisc.edu assert((msg.getPhysicalAddress().getAddress() & m_data_block_mask) == 0); 1036368Sdrh5@cs.wisc.edu msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 1046285Snate@binkert.org msg.getOffset() = 0; 1056368Sdrh5@cs.wisc.edu msg.getType() = (active_request.write ? DMARequestType_WRITE : 1066368Sdrh5@cs.wisc.edu DMARequestType_READ); 1076368Sdrh5@cs.wisc.edu msg.getLen() = (active_request.len - 1086368Sdrh5@cs.wisc.edu active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? 1096368Sdrh5@cs.wisc.edu active_request.len - active_request.bytes_completed : 1106368Sdrh5@cs.wisc.edu RubySystem::getBlockSizeBytes()); 1116285Snate@binkert.org if (active_request.write) { 1126368Sdrh5@cs.wisc.edu msg.getDataBlk().setData(&active_request.data[active_request.bytes_completed], 1136368Sdrh5@cs.wisc.edu 0, msg.getLen()); 1146285Snate@binkert.org msg.getType() = DMARequestType_WRITE; 1156285Snate@binkert.org } else { 1166285Snate@binkert.org msg.getType() = DMARequestType_READ; 1176285Snate@binkert.org } 1186285Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1196285Snate@binkert.org active_request.bytes_issued += msg.getLen(); 1206285Snate@binkert.org} 1216285Snate@binkert.org 1226285Snate@binkert.orgvoid DMASequencer::dataCallback(const DataBlock & dblk) 1236285Snate@binkert.org{ 1246285Snate@binkert.org assert(m_is_busy == true); 1256285Snate@binkert.org int len = active_request.bytes_issued - active_request.bytes_completed; 1266285Snate@binkert.org int offset = 0; 1276285Snate@binkert.org if (active_request.bytes_completed == 0) 1286368Sdrh5@cs.wisc.edu offset = active_request.start_paddr & m_data_block_mask; 1296368Sdrh5@cs.wisc.edu assert( active_request.write == false ); 1306368Sdrh5@cs.wisc.edu memcpy(&active_request.data[active_request.bytes_completed], 1316368Sdrh5@cs.wisc.edu dblk.getData(offset, len), len); 1326285Snate@binkert.org issueNext(); 1336285Snate@binkert.org} 1346285Snate@binkert.org 1356285Snate@binkert.orgvoid DMASequencer::ackCallback() 1366285Snate@binkert.org{ 1376285Snate@binkert.org issueNext(); 1386285Snate@binkert.org} 1396285Snate@binkert.org 1406285Snate@binkert.orgvoid DMASequencer::printConfig(ostream & out) 1416285Snate@binkert.org{ 1426285Snate@binkert.org 1436285Snate@binkert.org} 144