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14 * Copyright (c) 2002-2005 The Regents of The University of Michigan
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40 * Authors: Erik Hallnor
49 #ifndef __MEM_CACHE_WRITE_QUEUE_ENTRY_HH__
50 #define __MEM_CACHE_WRITE_QUEUE_ENTRY_HH__
54 #include "base/printable.hh"
55 #include "mem/cache/queue_entry.hh"
62 class WriteQueueEntry : public QueueEntry, public Printable
66 * Consider the queues friends to avoid making everything public.
68 template<typename Entry>
70 friend class WriteQueue;
77 const Tick recvTime; //!< Time when request was received (for stats)
78 const Tick readyTime; //!< Time when request is ready to be serviced
79 const Counter order; //!< Global order (for memory consistency mgmt)
80 const PacketPtr pkt; //!< Pending request packet.
82 Target(PacketPtr _pkt, Tick _readyTime, Counter _order)
83 : recvTime(curTick()), readyTime(_readyTime), order(_order),
88 class TargetList : public std::list<Target> {
93 void add(PacketPtr pkt, Tick readyTime, Counter order);
94 bool checkFunctional(PacketPtr pkt);
95 void print(std::ostream &os, int verbosity,
96 const std::string &prefix) const;
99 /** A list of write queue entriess. */
100 typedef std::list<WriteQueueEntry *> List;
101 /** WriteQueueEntry list iterator. */
102 typedef List::iterator Iterator;
104 bool sendPacket(Cache &cache);
109 * Pointer to this entry on the ready list.
110 * @sa MissQueue, WriteQueue::readyList
115 * Pointer to this entry on the allocated list.
116 * @sa MissQueue, WriteQueue::allocatedList
120 /** List of all requests that match the address */
125 /** A simple constructor. */
129 * Allocate a miss to this entry.
130 * @param blk_addr The address of the block.
131 * @param blk_size The number of bytes to request.
132 * @param pkt The original write.
133 * @param when_ready When should the write be sent out.
134 * @param _order The logical order of this write.
136 void allocate(Addr blk_addr, unsigned blk_size, PacketPtr pkt,
137 Tick when_ready, Counter _order);
141 * Mark this entry as free.
146 * Returns the current number of allocated targets.
147 * @return The current number of allocated targets.
149 int getNumTargets() const
150 { return targets.size(); }
153 * Returns true if there are targets left.
154 * @return true if there are targets
156 bool hasTargets() const { return !targets.empty(); }
159 * Returns a reference to the first target.
160 * @return A pointer to the first target.
164 assert(hasTargets());
165 return &targets.front();
176 bool checkFunctional(PacketPtr pkt);
179 * Prints the contents of this MSHR for debugging.
181 void print(std::ostream &os,
183 const std::string &prefix = "") const;
185 * A no-args wrapper of print(std::ostream...) meant to be
186 * invoked from DPRINTFs avoiding string overheads in fast mode
188 * @return string with mshr fields
190 std::string print() const;
193 #endif // __MEM_CACHE_WRITE_QUEUE_ENTRY_HH__