1/*
2 * Copyright (c) 2006 The Regents of The University of Michigan
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;

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86
87 /** Device address (e.g., bus ID) of the destination of the
88 * transaction. The special value Broadcast indicates that the
89 * packet should be routed based on its address. This field is
90 * initialized in the constructor and is thus always valid
91 * (unlike * addr, size, and src). */
92 short dest;
93
94 /** Are the 'addr' and 'size' fields valid? */
95 bool addrSizeValid;
96 /** Is the 'src' field valid? */
97 bool srcValid;
98
99 public:
100
101 /** The special destination address indicating that the packet
102 * should be routed based on its address. */
103 static const short Broadcast = -1;

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185 short getSrc() const { assert(srcValid); return src; }
186 void setSrc(short _src) { src = _src; srcValid = true; }
187
188 /** Accessor function that returns the destination index of
189 the packet. */
190 short getDest() const { return dest; }
191 void setDest(short _dest) { dest = _dest; }
192
193 Addr getAddr() const { assert(addrSizeValid); return addr; }
194 int getSize() const { assert(addrSizeValid); return size; }
195
196 /** Constructor. Note that a Request object must be constructed
197 * first, but the Requests's physical address and size fields
198 * need not be valid. The command and destination addresses
199 * must be supplied. */
200 Packet(Request *_req, Command _cmd, short _dest)
201 : data(NULL), staticData(false), dynamicData(false), arrayData(false),
202 addr(_req->paddr), size(_req->size), dest(_dest),
203 addrSizeValid(_req->validPaddr),
204 srcValid(false),
205 req(_req), coherence(NULL), senderState(NULL), cmd(_cmd),
206 result(Unknown)
207 {
208 }
209
210 /** Destructor. */
211 ~Packet()
212 { deleteData(); }
213
214 /** Reinitialize packet address and size from the associated
215 * Request object, and reset other fields that may have been
216 * modified by a previous transaction. Typically called when a
217 * statically allocated Request/Packet pair is reused for
218 * multiple transactions. */
219 void reinitFromRequest() {
220 assert(req->validPaddr);
221 addr = req->paddr;
222 size = req->size;
223 addrSizeValid = true;
224 result = Unknown;
225 if (dynamicData) {
226 deleteData();
227 dynamicData = false;
228 arrayData = false;
229 }
230 }
231

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