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#include "mem/protocol/SequencerMsg.hh"
30#include "mem/protocol/SequencerRequestType.hh"
31#include "mem/ruby/buffers/MessageBuffer.hh"
32#include "mem/ruby/slicc_interface/AbstractController.hh"
33#include "mem/ruby/system/DMASequencer.hh"
34#include "mem/ruby/system/System.hh"
35
36DMASequencer::DMASequencer(const Params *p)
37 : RubyPort(p)
38{
39}
40
41void
42DMASequencer::init()
43{
44 RubyPort::init();
45 m_is_busy = false;
46 m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits());
47}
48
49RequestStatus
50DMASequencer::makeRequest(const RubyRequest &request)
51{
52 if (m_is_busy) {
53 return RequestStatus_BufferFull;
54 }
55
56 uint64_t paddr = request.paddr;
57 uint8_t* data = request.data;
58 int len = request.len;
59 bool write = false;
60 switch(request.type) {
61 case RubyRequestType_LD:
62 write = false;
63 break;
64 case RubyRequestType_ST:
65 write = true;
66 break;
67 case RubyRequestType_NULL:
68 case RubyRequestType_IFETCH:
69 case RubyRequestType_Load_Linked:
70 case RubyRequestType_Store_Conditional:
71 case RubyRequestType_RMW_Read:
72 case RubyRequestType_RMW_Write:
73 case RubyRequestType_Locked_RMW_Read:
74 case RubyRequestType_Locked_RMW_Write:
75 case RubyRequestType_NUM:
76 panic("DMASequencer::makeRequest does not support RubyRequestType");
77 return RequestStatus_NULL;
78 }
79
80 assert(!m_is_busy); // only support one outstanding DMA request
81 m_is_busy = true;
82
83 active_request.start_paddr = paddr;
84 active_request.write = write;
85 active_request.data = data;
86 active_request.len = len;
87 active_request.bytes_completed = 0;
88 active_request.bytes_issued = 0;
89 active_request.pkt = request.pkt;
90
91 SequencerMsg *msg = new SequencerMsg;
92 msg->getPhysicalAddress() = Address(paddr);
93 msg->getLineAddress() = line_address(msg->getPhysicalAddress());
94 msg->getType() = write ? SequencerRequestType_ST : SequencerRequestType_LD;
95 int offset = paddr & m_data_block_mask;
96
97 msg->getLen() = (offset + len) <= RubySystem::getBlockSizeBytes() ?
98 len : RubySystem::getBlockSizeBytes() - offset;
99
100 if (write && (data != NULL)) {
101 if (active_request.data != NULL) {
102 msg->getDataBlk().setData(data, offset, msg->getLen());
103 }
104 }
105
106 assert(m_mandatory_q_ptr != NULL);
107 m_mandatory_q_ptr->enqueue(msg);
108 active_request.bytes_issued += msg->getLen();
109
110 return RequestStatus_Issued;
111}
112
113void
114DMASequencer::issueNext()
115{
116 assert(m_is_busy == true);
117 active_request.bytes_completed = active_request.bytes_issued;
118 if (active_request.len == active_request.bytes_completed) {
119 DPRINTF(RubyDma, "DMA request completed\n");
120 ruby_hit_callback(active_request.pkt);
121 m_is_busy = false;
122 return;
123 }
124
125 SequencerMsg *msg = new SequencerMsg;
126 msg->getPhysicalAddress() = Address(active_request.start_paddr +
127 active_request.bytes_completed);
128
129 assert((msg->getPhysicalAddress().getAddress() & m_data_block_mask) == 0);
130 msg->getLineAddress() = line_address(msg->getPhysicalAddress());
131
132 msg->getType() = (active_request.write ? SequencerRequestType_ST :
133 SequencerRequestType_LD);
134
135 msg->getLen() =
136 (active_request.len -
137 active_request.bytes_completed < RubySystem::getBlockSizeBytes() ?
138 active_request.len - active_request.bytes_completed :
139 RubySystem::getBlockSizeBytes());
140
141 if (active_request.write) {
142 msg->getDataBlk().
143 setData(&active_request.data[active_request.bytes_completed],
144 0, msg->getLen());
145 msg->getType() = SequencerRequestType_ST;
146 } else {
147 msg->getType() = SequencerRequestType_LD;
148 }
149
150 assert(m_mandatory_q_ptr != NULL);
151 m_mandatory_q_ptr->enqueue(msg);
152 active_request.bytes_issued += msg->getLen();
| 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#include "mem/protocol/SequencerMsg.hh"
30#include "mem/protocol/SequencerRequestType.hh"
31#include "mem/ruby/buffers/MessageBuffer.hh"
32#include "mem/ruby/slicc_interface/AbstractController.hh"
33#include "mem/ruby/system/DMASequencer.hh"
34#include "mem/ruby/system/System.hh"
35
36DMASequencer::DMASequencer(const Params *p)
37 : RubyPort(p)
38{
39}
40
41void
42DMASequencer::init()
43{
44 RubyPort::init();
45 m_is_busy = false;
46 m_data_block_mask = ~ (~0 << RubySystem::getBlockSizeBits());
47}
48
49RequestStatus
50DMASequencer::makeRequest(const RubyRequest &request)
51{
52 if (m_is_busy) {
53 return RequestStatus_BufferFull;
54 }
55
56 uint64_t paddr = request.paddr;
57 uint8_t* data = request.data;
58 int len = request.len;
59 bool write = false;
60 switch(request.type) {
61 case RubyRequestType_LD:
62 write = false;
63 break;
64 case RubyRequestType_ST:
65 write = true;
66 break;
67 case RubyRequestType_NULL:
68 case RubyRequestType_IFETCH:
69 case RubyRequestType_Load_Linked:
70 case RubyRequestType_Store_Conditional:
71 case RubyRequestType_RMW_Read:
72 case RubyRequestType_RMW_Write:
73 case RubyRequestType_Locked_RMW_Read:
74 case RubyRequestType_Locked_RMW_Write:
75 case RubyRequestType_NUM:
76 panic("DMASequencer::makeRequest does not support RubyRequestType");
77 return RequestStatus_NULL;
78 }
79
80 assert(!m_is_busy); // only support one outstanding DMA request
81 m_is_busy = true;
82
83 active_request.start_paddr = paddr;
84 active_request.write = write;
85 active_request.data = data;
86 active_request.len = len;
87 active_request.bytes_completed = 0;
88 active_request.bytes_issued = 0;
89 active_request.pkt = request.pkt;
90
91 SequencerMsg *msg = new SequencerMsg;
92 msg->getPhysicalAddress() = Address(paddr);
93 msg->getLineAddress() = line_address(msg->getPhysicalAddress());
94 msg->getType() = write ? SequencerRequestType_ST : SequencerRequestType_LD;
95 int offset = paddr & m_data_block_mask;
96
97 msg->getLen() = (offset + len) <= RubySystem::getBlockSizeBytes() ?
98 len : RubySystem::getBlockSizeBytes() - offset;
99
100 if (write && (data != NULL)) {
101 if (active_request.data != NULL) {
102 msg->getDataBlk().setData(data, offset, msg->getLen());
103 }
104 }
105
106 assert(m_mandatory_q_ptr != NULL);
107 m_mandatory_q_ptr->enqueue(msg);
108 active_request.bytes_issued += msg->getLen();
109
110 return RequestStatus_Issued;
111}
112
113void
114DMASequencer::issueNext()
115{
116 assert(m_is_busy == true);
117 active_request.bytes_completed = active_request.bytes_issued;
118 if (active_request.len == active_request.bytes_completed) {
119 DPRINTF(RubyDma, "DMA request completed\n");
120 ruby_hit_callback(active_request.pkt);
121 m_is_busy = false;
122 return;
123 }
124
125 SequencerMsg *msg = new SequencerMsg;
126 msg->getPhysicalAddress() = Address(active_request.start_paddr +
127 active_request.bytes_completed);
128
129 assert((msg->getPhysicalAddress().getAddress() & m_data_block_mask) == 0);
130 msg->getLineAddress() = line_address(msg->getPhysicalAddress());
131
132 msg->getType() = (active_request.write ? SequencerRequestType_ST :
133 SequencerRequestType_LD);
134
135 msg->getLen() =
136 (active_request.len -
137 active_request.bytes_completed < RubySystem::getBlockSizeBytes() ?
138 active_request.len - active_request.bytes_completed :
139 RubySystem::getBlockSizeBytes());
140
141 if (active_request.write) {
142 msg->getDataBlk().
143 setData(&active_request.data[active_request.bytes_completed],
144 0, msg->getLen());
145 msg->getType() = SequencerRequestType_ST;
146 } else {
147 msg->getType() = SequencerRequestType_LD;
148 }
149
150 assert(m_mandatory_q_ptr != NULL);
151 m_mandatory_q_ptr->enqueue(msg);
152 active_request.bytes_issued += msg->getLen();
|
153 DPRINTF(RubyDma, "Next DMA segment issued to the DMA cntrl\n");
| 153 DPRINTF(RubyDma,
154 "DMA request bytes issued %d, bytes completed %d, total len %d\n",
155 active_request.bytes_issued, active_request.bytes_completed,
156 active_request.len);
|
154}
155
156void
157DMASequencer::dataCallback(const DataBlock & dblk)
158{
159 assert(m_is_busy == true);
160 int len = active_request.bytes_issued - active_request.bytes_completed;
161 int offset = 0;
162 if (active_request.bytes_completed == 0)
163 offset = active_request.start_paddr & m_data_block_mask;
164 assert(active_request.write == false);
165 if (active_request.data != NULL) {
166 memcpy(&active_request.data[active_request.bytes_completed],
167 dblk.getData(offset, len), len);
168 }
169 issueNext();
170}
171
172void
173DMASequencer::ackCallback()
174{
175 issueNext();
176}
177
178void
179DMASequencer::printConfig(std::ostream & out)
180{
181}
182
183DMASequencer *
184DMASequencerParams::create()
185{
186 return new DMASequencer(this);
187}
| 157}
158
159void
160DMASequencer::dataCallback(const DataBlock & dblk)
161{
162 assert(m_is_busy == true);
163 int len = active_request.bytes_issued - active_request.bytes_completed;
164 int offset = 0;
165 if (active_request.bytes_completed == 0)
166 offset = active_request.start_paddr & m_data_block_mask;
167 assert(active_request.write == false);
168 if (active_request.data != NULL) {
169 memcpy(&active_request.data[active_request.bytes_completed],
170 dblk.getData(offset, len), len);
171 }
172 issueNext();
173}
174
175void
176DMASequencer::ackCallback()
177{
178 issueNext();
179}
180
181void
182DMASequencer::printConfig(std::ostream & out)
183{
184}
185
186DMASequencer *
187DMASequencerParams::create()
188{
189 return new DMASequencer(this);
190}
|