packet.hh (11127:f39c2cc0d44e) packet.hh (11199:929fd978ab4e)
1/*
2 * Copyright (c) 2012-2015 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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81 enum Command
82 {
83 InvalidCmd,
84 ReadReq,
85 ReadResp,
86 ReadRespWithInvalidate,
87 WriteReq,
88 WriteResp,
1/*
2 * Copyright (c) 2012-2015 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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81 enum Command
82 {
83 InvalidCmd,
84 ReadReq,
85 ReadResp,
86 ReadRespWithInvalidate,
87 WriteReq,
88 WriteResp,
89 Writeback,
89 WritebackDirty,
90 WritebackClean,
90 CleanEvict,
91 SoftPFReq,
92 HardPFReq,
93 SoftPFResp,
94 HardPFResp,
95 WriteLineReq,
96 UpgradeReq,
97 SCUpgradeReq, // Special "weak" upgrade for StoreCond

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139 IsRead, //!< Data flows from responder to requester
140 IsWrite, //!< Data flows from requester to responder
141 IsUpgrade,
142 IsInvalidate,
143 NeedsExclusive, //!< Requires exclusive copy to complete in-cache
144 IsRequest, //!< Issued by requester
145 IsResponse, //!< Issue by responder
146 NeedsResponse, //!< Requester needs response from target
91 CleanEvict,
92 SoftPFReq,
93 HardPFReq,
94 SoftPFResp,
95 HardPFResp,
96 WriteLineReq,
97 UpgradeReq,
98 SCUpgradeReq, // Special "weak" upgrade for StoreCond

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140 IsRead, //!< Data flows from responder to requester
141 IsWrite, //!< Data flows from requester to responder
142 IsUpgrade,
143 IsInvalidate,
144 NeedsExclusive, //!< Requires exclusive copy to complete in-cache
145 IsRequest, //!< Issued by requester
146 IsResponse, //!< Issue by responder
147 NeedsResponse, //!< Requester needs response from target
148 IsEviction,
147 IsSWPrefetch,
148 IsHWPrefetch,
149 IsLlsc, //!< Alpha/MIPS LL or SC access
150 HasData, //!< There is an associated payload
151 IsError, //!< Error response
152 IsPrint, //!< Print state matching address (for debugging)
153 IsFlush, //!< Flush the address from caches
154 NUM_COMMAND_ATTRIBUTES

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187 bool isRead() const { return testCmdAttrib(IsRead); }
188 bool isWrite() const { return testCmdAttrib(IsWrite); }
189 bool isUpgrade() const { return testCmdAttrib(IsUpgrade); }
190 bool isRequest() const { return testCmdAttrib(IsRequest); }
191 bool isResponse() const { return testCmdAttrib(IsResponse); }
192 bool needsExclusive() const { return testCmdAttrib(NeedsExclusive); }
193 bool needsResponse() const { return testCmdAttrib(NeedsResponse); }
194 bool isInvalidate() const { return testCmdAttrib(IsInvalidate); }
149 IsSWPrefetch,
150 IsHWPrefetch,
151 IsLlsc, //!< Alpha/MIPS LL or SC access
152 HasData, //!< There is an associated payload
153 IsError, //!< Error response
154 IsPrint, //!< Print state matching address (for debugging)
155 IsFlush, //!< Flush the address from caches
156 NUM_COMMAND_ATTRIBUTES

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189 bool isRead() const { return testCmdAttrib(IsRead); }
190 bool isWrite() const { return testCmdAttrib(IsWrite); }
191 bool isUpgrade() const { return testCmdAttrib(IsUpgrade); }
192 bool isRequest() const { return testCmdAttrib(IsRequest); }
193 bool isResponse() const { return testCmdAttrib(IsResponse); }
194 bool needsExclusive() const { return testCmdAttrib(NeedsExclusive); }
195 bool needsResponse() const { return testCmdAttrib(NeedsResponse); }
196 bool isInvalidate() const { return testCmdAttrib(IsInvalidate); }
197 bool isEviction() const { return testCmdAttrib(IsEviction); }
195
196 /**
198
199 /**
200 * A writeback is an eviction that carries data.
201 */
202 bool isWriteback() const { return testCmdAttrib(IsEviction) &&
203 testCmdAttrib(HasData); }
204
205 /**
197 * Check if this particular packet type carries payload data. Note
198 * that this does not reflect if the data pointer of the packet is
199 * valid or not.
200 */
201 bool hasData() const { return testCmdAttrib(HasData); }
202 bool isLLSC() const { return testCmdAttrib(IsLlsc); }
203 bool isSWPrefetch() const { return testCmdAttrib(IsSWPrefetch); }
204 bool isHWPrefetch() const { return testCmdAttrib(IsHWPrefetch); }

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486 bool isRead() const { return cmd.isRead(); }
487 bool isWrite() const { return cmd.isWrite(); }
488 bool isUpgrade() const { return cmd.isUpgrade(); }
489 bool isRequest() const { return cmd.isRequest(); }
490 bool isResponse() const { return cmd.isResponse(); }
491 bool needsExclusive() const { return cmd.needsExclusive(); }
492 bool needsResponse() const { return cmd.needsResponse(); }
493 bool isInvalidate() const { return cmd.isInvalidate(); }
206 * Check if this particular packet type carries payload data. Note
207 * that this does not reflect if the data pointer of the packet is
208 * valid or not.
209 */
210 bool hasData() const { return testCmdAttrib(HasData); }
211 bool isLLSC() const { return testCmdAttrib(IsLlsc); }
212 bool isSWPrefetch() const { return testCmdAttrib(IsSWPrefetch); }
213 bool isHWPrefetch() const { return testCmdAttrib(IsHWPrefetch); }

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495 bool isRead() const { return cmd.isRead(); }
496 bool isWrite() const { return cmd.isWrite(); }
497 bool isUpgrade() const { return cmd.isUpgrade(); }
498 bool isRequest() const { return cmd.isRequest(); }
499 bool isResponse() const { return cmd.isResponse(); }
500 bool needsExclusive() const { return cmd.needsExclusive(); }
501 bool needsResponse() const { return cmd.needsResponse(); }
502 bool isInvalidate() const { return cmd.isInvalidate(); }
503 bool isEviction() const { return cmd.isEviction(); }
504 bool isWriteback() const { return cmd.isWriteback(); }
494 bool hasData() const { return cmd.hasData(); }
495 bool isLLSC() const { return cmd.isLLSC(); }
496 bool isError() const { return cmd.isError(); }
497 bool isPrint() const { return cmd.isPrint(); }
498 bool isFlush() const { return cmd.isFlush(); }
499
500 // Snoop flags
501 void assertMemInhibit()

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1003 // data pointer
1004 return checkFunctional(other, other->getAddr(), other->isSecure(),
1005 other->getSize(),
1006 other->hasData() ?
1007 other->getPtr<uint8_t>() : NULL);
1008 }
1009
1010 /**
505 bool hasData() const { return cmd.hasData(); }
506 bool isLLSC() const { return cmd.isLLSC(); }
507 bool isError() const { return cmd.isError(); }
508 bool isPrint() const { return cmd.isPrint(); }
509 bool isFlush() const { return cmd.isFlush(); }
510
511 // Snoop flags
512 void assertMemInhibit()

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1014 // data pointer
1015 return checkFunctional(other, other->getAddr(), other->isSecure(),
1016 other->getSize(),
1017 other->hasData() ?
1018 other->getPtr<uint8_t>() : NULL);
1019 }
1020
1021 /**
1011 * Is this request notification of a clean or dirty eviction from the cache.
1022 * Does the request need to check for cached copies of the same block
1023 * in the memory hierarchy above.
1012 **/
1013 bool
1024 **/
1025 bool
1014 evictingBlock() const
1026 mustCheckAbove() const
1015 {
1027 {
1016 return (cmd == MemCmd::Writeback ||
1017 cmd == MemCmd::CleanEvict);
1028 return cmd == MemCmd::HardPFReq || isEviction();
1018 }
1019
1020 /**
1029 }
1030
1031 /**
1021 * Does the request need to check for cached copies of the same block
1022 * in the memory hierarchy above.
1023 **/
1032 * Is this packet a clean eviction, including both actual clean
1033 * evict packets, but also clean writebacks.
1034 */
1024 bool
1035 bool
1025 mustCheckAbove() const
1036 isCleanEviction() const
1026 {
1037 {
1027 return (cmd == MemCmd::HardPFReq ||
1028 evictingBlock());
1038 return cmd == MemCmd::CleanEvict || cmd == MemCmd::WritebackClean;
1029 }
1030
1031 /**
1032 * Check a functional request against a memory value represented
1033 * by a base/size pair and an associated data array. If the
1034 * current packet is a read, it may be satisfied by the memory
1035 * value. If the current packet is a write, it may update the
1036 * memory value.

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1040
1041 /**
1042 * Check a functional request against a memory value represented
1043 * by a base/size pair and an associated data array. If the
1044 * current packet is a read, it may be satisfied by the memory
1045 * value. If the current packet is a write, it may update the
1046 * memory value.

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