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; --- 17 unchanged lines hidden (view full) --- 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 <memory> 33#include <ostream> |
34#include <unordered_map> |
35 36#include "mem/protocol/DMASequencerRequestType.hh" |
37#include "mem/ruby/common/Address.hh" |
38#include "mem/ruby/common/DataBlock.hh" 39#include "mem/ruby/system/RubyPort.hh" 40#include "params/DMASequencer.hh" 41 42struct DMARequest 43{ |
44 DMARequest(uint64_t start_paddr, int len, bool write, int bytes_completed, 45 int bytes_issued, uint8_t *data, PacketPtr pkt); 46 |
47 uint64_t start_paddr; 48 int len; 49 bool write; 50 int bytes_completed; 51 int bytes_issued; 52 uint8_t *data; 53 PacketPtr pkt; 54}; 55 56class DMASequencer : public RubyPort 57{ 58 public: 59 typedef DMASequencerParams Params; 60 DMASequencer(const Params *); 61 void init() override; 62 63 /* external interface */ 64 RequestStatus makeRequest(PacketPtr pkt) override; |
65 bool busy() { return m_outstanding_count > 0; } 66 int outstandingCount() const override { return m_outstanding_count; } |
67 bool isDeadlockEventScheduled() const override { return false; } 68 void descheduleDeadlockEvent() override {} 69 70 /* SLICC callback */ |
71 void dataCallback(const DataBlock &dblk, const Addr &addr); 72 void ackCallback(const Addr &addr); |
73 74 void recordRequestType(DMASequencerRequestType requestType); 75 76 private: |
77 void issueNext(const Addr &addr); |
78 |
79 uint64_t m_data_block_mask; |
80 81 typedef std::unordered_map<Addr, DMARequest> RequestTable; 82 RequestTable m_RequestTable; 83 84 int m_outstanding_count; 85 int m_max_outstanding_requests; |
86}; 87 88#endif // __MEM_RUBY_SYSTEM_DMASEQUENCER_HH__ |