1
2#include "mem/ruby/system/DMASequencer.hh"
3#include "mem/ruby/buffers/MessageBuffer.hh"
4#include "mem/ruby/slicc_interface/AbstractController.hh"
5
6/* SLICC generated types */
7#include "mem/protocol/SequencerMsg.hh"
8#include "mem/protocol/SequencerRequestType.hh"
9#include "mem/ruby/system/System.hh"
10
11DMASequencer::DMASequencer(const Params *p)
12 : RubyPort(p)
13{
14}
15
16void DMASequencer::init()
17{
18 m_is_busy = false;
19 m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits());
20}
21
22int64_t DMASequencer::makeRequest(const RubyRequest & request)
23{
24 uint64_t paddr = request.paddr;
25 uint8_t* data = request.data;

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53 active_request.bytes_issued = 0;
54 active_request.id = makeUniqueRequestID();
55
56 SequencerMsg msg;
57 msg.getPhysicalAddress() = Address(paddr);
58 msg.getLineAddress() = line_address(msg.getPhysicalAddress());
59 msg.getType() = write ? SequencerRequestType_ST : SequencerRequestType_LD;
60 int offset = paddr & m_data_block_mask;
61 msg.getLen() = (offset + len) <= RubySystem::getBlockSizeBytes() ?
62 len :
63 RubySystem::getBlockSizeBytes() - offset;
64 if (write)
65 msg.getDataBlk().setData(data, offset, msg.getLen());
66 m_mandatory_q_ptr->enqueue(msg);
67 active_request.bytes_issued += msg.getLen();
68
69 return active_request.id;
70}
71
72void DMASequencer::issueNext()
73{
74 assert(m_is_busy == true);
75 active_request.bytes_completed = active_request.bytes_issued;
76 if (active_request.len == active_request.bytes_completed) {
77 m_hit_callback(active_request.id);
78 m_is_busy = false;
79 return;
80 }
81
82 SequencerMsg msg;
83 msg.getPhysicalAddress() = Address(active_request.start_paddr +
84 active_request.bytes_completed);
85 assert((msg.getPhysicalAddress().getAddress() & m_data_block_mask) == 0);
86 msg.getLineAddress() = line_address(msg.getPhysicalAddress());
87 msg.getType() = (active_request.write ? SequencerRequestType_ST :
88 SequencerRequestType_LD);
89 msg.getLen() = (active_request.len -
90 active_request.bytes_completed < RubySystem::getBlockSizeBytes() ?
91 active_request.len - active_request.bytes_completed :
92 RubySystem::getBlockSizeBytes());
93 if (active_request.write) {
94 msg.getDataBlk().setData(&active_request.data[active_request.bytes_completed],
95 0, msg.getLen());
96 msg.getType() = SequencerRequestType_ST;
97 } else {
98 msg.getType() = SequencerRequestType_LD;
99 }
100 m_mandatory_q_ptr->enqueue(msg);
101 active_request.bytes_issued += msg.getLen();
102}
103
104void DMASequencer::dataCallback(const DataBlock & dblk)
105{
106 assert(m_is_busy == true);
107 int len = active_request.bytes_issued - active_request.bytes_completed;

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