DMASequencer.hh revision 8615:e66a566f2cfa
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/ruby/common/DataBlock.hh" 35#include "mem/ruby/system/RubyPort.hh" 36#include "params/DMASequencer.hh" 37 38struct DMARequest 39{ 40 uint64_t start_paddr; 41 int len; 42 bool write; 43 int bytes_completed; 44 int bytes_issued; 45 uint8* data; 46 PacketPtr pkt; 47}; 48 49class DMASequencer : public RubyPort 50{ 51 public: 52 typedef DMASequencerParams Params; 53 DMASequencer(const Params *); 54 void init(); 55 /* external interface */ 56 RequestStatus makeRequest(PacketPtr pkt); 57 bool busy() { return m_is_busy;} 58 59 /* SLICC callback */ 60 void dataCallback(const DataBlock & dblk); 61 void ackCallback(); 62 63 void printConfig(std::ostream & out); 64 65 private: 66 void issueNext(); 67 68 private: 69 bool m_is_busy; 70 uint64_t m_data_block_mask; 71 DMARequest active_request; 72 int num_active_requests; 73}; 74 75#endif // __MEM_RUBY_SYSTEM_DMASEQUENCER_HH__ 76