DMASequencer.hh revision 9208:2451e60d4555
1/* 2 * Copyright (c) 2008 Mark D. Hill and David A. Wood 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#ifndef __MEM_RUBY_SYSTEM_DMASEQUENCER_HH__ 30#define __MEM_RUBY_SYSTEM_DMASEQUENCER_HH__ 31 32#include <ostream> 33 34#include "mem/protocol/DMASequencerRequestType.hh" 35#include "mem/ruby/common/DataBlock.hh" 36#include "mem/ruby/system/RubyPort.hh" 37#include "params/DMASequencer.hh" 38 39struct DMARequest 40{ 41 uint64_t start_paddr; 42 int len; 43 bool write; 44 int bytes_completed; 45 int bytes_issued; 46 uint8_t *data; 47 PacketPtr pkt; 48}; 49 50class DMASequencer : public RubyPort 51{ 52 public: 53 typedef DMASequencerParams Params; 54 DMASequencer(const Params *); 55 void init(); 56 /* external interface */ 57 RequestStatus makeRequest(PacketPtr pkt); 58 bool busy() { return m_is_busy;} 59 int outstandingCount() const { return (m_is_busy ? 1 : 0); } 60 bool isDeadlockEventScheduled() const { return false; } 61 void descheduleDeadlockEvent() {} 62 63 /* SLICC callback */ 64 void dataCallback(const DataBlock & dblk); 65 void ackCallback(); 66 67 void recordRequestType(DMASequencerRequestType requestType); 68 69 private: 70 void issueNext(); 71 72 private: 73 bool m_is_busy; 74 uint64_t m_data_block_mask; 75 DMARequest active_request; 76 int num_active_requests; 77}; 78 79#endif // __MEM_RUBY_SYSTEM_DMASEQUENCER_HH__ 80