DMASequencer.cc revision 6285
112062Sar4jc@virginia.edu 212062Sar4jc@virginia.edu#include "mem/ruby/system/DMASequencer.hh" 311731Sjason@lowepower.com#include "mem/ruby/buffers/MessageBuffer.hh" 411731Sjason@lowepower.com#include "mem/ruby/slicc_interface/AbstractController.hh" 511731Sjason@lowepower.com 611731Sjason@lowepower.com/* SLICC generated types */ 711731Sjason@lowepower.com#include "mem/protocol/DMARequestMsg.hh" 811731Sjason@lowepower.com#include "mem/protocol/DMARequestType.hh" 911731Sjason@lowepower.com#include "mem/protocol/DMAResponseMsg.hh" 1011731Sjason@lowepower.com#include "mem/ruby/system/System.hh" 1112062Sar4jc@virginia.edu 1211731Sjason@lowepower.comDMASequencer::DMASequencer(const string & name) 1312062Sar4jc@virginia.edu : RubyPort(name) 1412062Sar4jc@virginia.edu{ 1512062Sar4jc@virginia.edu} 16 17void DMASequencer::init(const vector<string> & argv) 18{ 19 m_version = -1; 20 m_controller = NULL; 21 for (size_t i=0;i<argv.size();i+=2) { 22 if (argv[i] == "controller") 23 m_controller = RubySystem::getController(argv[i+1]); 24 else if (argv[i] == "version") 25 m_version = atoi(argv[i+1].c_str()); 26 } 27 assert(m_controller != NULL); 28 assert(m_version != -1); 29 30 m_mandatory_q_ptr = m_controller->getMandatoryQueue(); 31 m_is_busy = false; 32} 33 34int64_t DMASequencer::makeRequest(const RubyRequest & request) 35{ 36 uint64_t paddr = request.paddr; 37 uint8_t* data = request.data; 38 int len = request.len; 39 bool write = false; 40 switch(request.type) { 41 case RubyRequestType_LD: 42 write = false; 43 break; 44 case RubyRequestType_ST: 45 write = true; 46 break; 47 case RubyRequestType_NULL: 48 case RubyRequestType_IFETCH: 49 case RubyRequestType_RMW: 50 assert(0); 51 } 52 53 assert(!m_is_busy); 54 m_is_busy = true; 55 56 active_request.start_paddr = paddr; 57 active_request.write = write; 58 active_request.data = data; 59 active_request.len = len; 60 active_request.bytes_completed = 0; 61 active_request.bytes_issued = 0; 62 active_request.id = makeUniqueRequestID(); 63 64 DMARequestMsg msg; 65 msg.getPhysicalAddress() = Address(paddr); 66 msg.getType() = write ? DMARequestType_WRITE : DMARequestType_READ; 67 msg.getOffset() = paddr & RubyConfig::dataBlockMask(); 68 msg.getLen() = (msg.getOffset() + len) < RubySystem::getBlockSizeBytes() ? 69 (msg.getOffset() + len) : 70 RubySystem::getBlockSizeBytes() - msg.getOffset(); 71 if (write) { 72 msg.getType() = DMARequestType_WRITE; 73 msg.getDataBlk().setData(data, 0, msg.getLen()); 74 } else { 75 msg.getType() = DMARequestType_READ; 76 } 77 m_mandatory_q_ptr->enqueue(msg); 78 active_request.bytes_issued += msg.getLen(); 79 80 return active_request.id; 81} 82 83void DMASequencer::issueNext() 84{ 85 assert(m_is_busy == true); 86 active_request.bytes_completed = active_request.bytes_issued; 87 if (active_request.len == active_request.bytes_completed) { 88 m_hit_callback(active_request.id); 89 m_is_busy = false; 90 return; 91 } 92 93 DMARequestMsg msg; 94 msg.getPhysicalAddress() = Address(active_request.start_paddr + active_request.bytes_completed); 95 assert((msg.getPhysicalAddress().getAddress() & RubyConfig::dataBlockMask()) == 0); 96 msg.getOffset() = 0; 97 msg.getType() = active_request.write ? DMARequestType_WRITE : DMARequestType_READ; 98 msg.getLen() = active_request.len - active_request.bytes_completed < RubySystem::getBlockSizeBytes() ? 99 active_request.len - active_request.bytes_completed : 100 RubySystem::getBlockSizeBytes(); 101 if (active_request.write) { 102 msg.getDataBlk().setData(&active_request.data[active_request.bytes_completed], 0, msg.getLen()); 103 msg.getType() = DMARequestType_WRITE; 104 } else { 105 msg.getType() = DMARequestType_READ; 106 } 107 m_mandatory_q_ptr->enqueue(msg); 108 active_request.bytes_issued += msg.getLen(); 109} 110 111void DMASequencer::dataCallback(const DataBlock & dblk) 112{ 113 assert(m_is_busy == true); 114 int len = active_request.bytes_issued - active_request.bytes_completed; 115 int offset = 0; 116 if (active_request.bytes_completed == 0) 117 offset = active_request.start_paddr & RubyConfig::dataBlockMask(); 118 memcpy(&active_request.data[active_request.bytes_completed], dblk.getData(offset, len), len); 119 issueNext(); 120} 121 122void DMASequencer::ackCallback() 123{ 124 issueNext(); 125} 126 127void DMASequencer::printConfig(ostream & out) 128{ 129 130} 131