DMASequencer.cc revision 7055
16145Snate@binkert.org/* 26145Snate@binkert.org * Copyright (c) 2008 Mark D. Hill and David A. Wood 36145Snate@binkert.org * All rights reserved. 46145Snate@binkert.org * 56145Snate@binkert.org * Redistribution and use in source and binary forms, with or without 66145Snate@binkert.org * modification, are permitted provided that the following conditions are 76145Snate@binkert.org * met: redistributions of source code must retain the above copyright 86145Snate@binkert.org * notice, this list of conditions and the following disclaimer; 96145Snate@binkert.org * redistributions in binary form must reproduce the above copyright 106145Snate@binkert.org * notice, this list of conditions and the following disclaimer in the 116145Snate@binkert.org * documentation and/or other materials provided with the distribution; 126145Snate@binkert.org * neither the name of the copyright holders nor the names of its 136145Snate@binkert.org * contributors may be used to endorse or promote products derived from 146145Snate@binkert.org * this software without specific prior written permission. 156145Snate@binkert.org * 166145Snate@binkert.org * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 176145Snate@binkert.org * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 186145Snate@binkert.org * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 196145Snate@binkert.org * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 206145Snate@binkert.org * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 216145Snate@binkert.org * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 226145Snate@binkert.org * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236145Snate@binkert.org * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246145Snate@binkert.org * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256145Snate@binkert.org * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 266145Snate@binkert.org * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276145Snate@binkert.org */ 286145Snate@binkert.org 296145Snate@binkert.org#include "mem/protocol/SequencerMsg.hh" 306145Snate@binkert.org#include "mem/protocol/SequencerRequestType.hh" 316145Snate@binkert.org#include "mem/ruby/buffers/MessageBuffer.hh" 326145Snate@binkert.org#include "mem/ruby/slicc_interface/AbstractController.hh" 336145Snate@binkert.org#include "mem/ruby/system/DMASequencer.hh" 346145Snate@binkert.org#include "mem/ruby/system/System.hh" 356145Snate@binkert.org 366145Snate@binkert.orgDMASequencer::DMASequencer(const Params *p) 376145Snate@binkert.org : RubyPort(p) 386145Snate@binkert.org{ 396145Snate@binkert.org} 406154Snate@binkert.org 416154Snate@binkert.orgvoid 426154Snate@binkert.orgDMASequencer::init() 436154Snate@binkert.org{ 446154Snate@binkert.org RubyPort::init(); 456154Snate@binkert.org m_is_busy = false; 466154Snate@binkert.org m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits()); 476154Snate@binkert.org} 486154Snate@binkert.org 496145Snate@binkert.orgRequestStatus 506145Snate@binkert.orgDMASequencer::makeRequest(const RubyRequest &request) 516145Snate@binkert.org{ 526145Snate@binkert.org uint64_t paddr = request.paddr; 536145Snate@binkert.org uint8_t* data = request.data; 546145Snate@binkert.org int len = request.len; 556145Snate@binkert.org bool write = false; 566145Snate@binkert.org switch(request.type) { 576145Snate@binkert.org case RubyRequestType_LD: 586145Snate@binkert.org write = false; 596145Snate@binkert.org break; 606145Snate@binkert.org case RubyRequestType_ST: 616145Snate@binkert.org write = true; 626145Snate@binkert.org break; 636145Snate@binkert.org case RubyRequestType_NULL: 646145Snate@binkert.org case RubyRequestType_IFETCH: 656145Snate@binkert.org case RubyRequestType_Locked_Read: 666145Snate@binkert.org case RubyRequestType_Locked_Write: 676145Snate@binkert.org case RubyRequestType_RMW_Read: 686145Snate@binkert.org case RubyRequestType_RMW_Write: 696145Snate@binkert.org case RubyRequestType_NUM: 706145Snate@binkert.org panic("DMASequencer::makeRequest does not support RubyRequestType"); 716145Snate@binkert.org return RequestStatus_NULL; 726145Snate@binkert.org } 736145Snate@binkert.org 746145Snate@binkert.org assert(!m_is_busy); // only support one outstanding DMA request 756145Snate@binkert.org m_is_busy = true; 766145Snate@binkert.org 776145Snate@binkert.org active_request.start_paddr = paddr; 786145Snate@binkert.org active_request.write = write; 796145Snate@binkert.org active_request.data = data; 806145Snate@binkert.org active_request.len = len; 816145Snate@binkert.org active_request.bytes_completed = 0; 826145Snate@binkert.org active_request.bytes_issued = 0; 836145Snate@binkert.org active_request.pkt = request.pkt; 846145Snate@binkert.org 856145Snate@binkert.org SequencerMsg msg; 866145Snate@binkert.org msg.getPhysicalAddress() = Address(paddr); 876145Snate@binkert.org msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 886145Snate@binkert.org msg.getType() = write ? SequencerRequestType_ST : SequencerRequestType_LD; 896145Snate@binkert.org int offset = paddr & m_data_block_mask; 906145Snate@binkert.org 916145Snate@binkert.org msg.getLen() = (offset + len) <= RubySystem::getBlockSizeBytes() ? 926145Snate@binkert.org len : RubySystem::getBlockSizeBytes() - offset; 936145Snate@binkert.org 946145Snate@binkert.org if (write) { 956145Snate@binkert.org msg.getDataBlk().setData(data, offset, msg.getLen()); 966145Snate@binkert.org } 976145Snate@binkert.org 986145Snate@binkert.org assert(m_mandatory_q_ptr != NULL); 996145Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1006145Snate@binkert.org active_request.bytes_issued += msg.getLen(); 1016145Snate@binkert.org 1026145Snate@binkert.org return RequestStatus_Issued; 1036145Snate@binkert.org} 1046145Snate@binkert.org 1056145Snate@binkert.orgvoid 1066151Sdrh5@cs.wisc.eduDMASequencer::issueNext() 1076151Sdrh5@cs.wisc.edu{ 1086145Snate@binkert.org assert(m_is_busy == true); 1096145Snate@binkert.org active_request.bytes_completed = active_request.bytes_issued; 1106151Sdrh5@cs.wisc.edu if (active_request.len == active_request.bytes_completed) { 1116151Sdrh5@cs.wisc.edu ruby_hit_callback(active_request.pkt); 1126145Snate@binkert.org m_is_busy = false; 1136145Snate@binkert.org return; 1146145Snate@binkert.org } 1156145Snate@binkert.org 1166145Snate@binkert.org SequencerMsg msg; 1176145Snate@binkert.org msg.getPhysicalAddress() = Address(active_request.start_paddr + 1186145Snate@binkert.org active_request.bytes_completed); 1196145Snate@binkert.org 1206145Snate@binkert.org assert((msg.getPhysicalAddress().getAddress() & m_data_block_mask) == 0); 1216145Snate@binkert.org msg.getLineAddress() = line_address(msg.getPhysicalAddress()); 1226145Snate@binkert.org 1236145Snate@binkert.org msg.getType() = (active_request.write ? SequencerRequestType_ST : 1246145Snate@binkert.org SequencerRequestType_LD); 1256145Snate@binkert.org 1266145Snate@binkert.org msg.getLen() = 1276145Snate@binkert.org (active_request.len - 1286152Sdrh5@cs.wisc.edu active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? 1296145Snate@binkert.org active_request.len - active_request.bytes_completed : 1306145Snate@binkert.org RubySystem::getBlockSizeBytes()); 1316145Snate@binkert.org 1326145Snate@binkert.org if (active_request.write) { 1336145Snate@binkert.org msg.getDataBlk(). 1346145Snate@binkert.org setData(&active_request.data[active_request.bytes_completed], 1356145Snate@binkert.org 0, msg.getLen()); 1366145Snate@binkert.org msg.getType() = SequencerRequestType_ST; 1376145Snate@binkert.org } else { 1386145Snate@binkert.org msg.getType() = SequencerRequestType_LD; 1396145Snate@binkert.org } 1406145Snate@binkert.org 1416145Snate@binkert.org assert(m_mandatory_q_ptr != NULL); 1426145Snate@binkert.org m_mandatory_q_ptr->enqueue(msg); 1436145Snate@binkert.org active_request.bytes_issued += msg.getLen(); 1446145Snate@binkert.org} 1456145Snate@binkert.org 1466145Snate@binkert.orgvoid 1476145Snate@binkert.orgDMASequencer::dataCallback(const DataBlock & dblk) 1486145Snate@binkert.org{ 1496145Snate@binkert.org assert(m_is_busy == true); 1506145Snate@binkert.org int len = active_request.bytes_issued - active_request.bytes_completed; 1516145Snate@binkert.org int offset = 0; 1526145Snate@binkert.org if (active_request.bytes_completed == 0) 1536145Snate@binkert.org offset = active_request.start_paddr & m_data_block_mask; 1546145Snate@binkert.org assert(active_request.write == false); 1556145Snate@binkert.org memcpy(&active_request.data[active_request.bytes_completed], 1566145Snate@binkert.org dblk.getData(offset, len), len); 1576145Snate@binkert.org issueNext(); 1586145Snate@binkert.org} 1596145Snate@binkert.org 1606145Snate@binkert.orgvoid 1616145Snate@binkert.orgDMASequencer::ackCallback() 1626145Snate@binkert.org{ 1636145Snate@binkert.org issueNext(); 1646145Snate@binkert.org} 1656145Snate@binkert.org 1666145Snate@binkert.orgvoid 1676145Snate@binkert.orgDMASequencer::printConfig(std::ostream & out) 168{ 169} 170 171DMASequencer * 172DMASequencerParams::create() 173{ 174 return new DMASequencer(this); 175} 176