gem5  v21.1.0.2
write_queue.cc
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40 
45 #include "mem/cache/write_queue.hh"
46 
47 #include <cassert>
48 
50 
51 namespace gem5
52 {
53 
54 WriteQueue::WriteQueue(const std::string &_label,
55  int num_entries, int reserve, const std::string &name)
56  : Queue<WriteQueueEntry>(_label, num_entries, reserve,
57  name + ".write_queue")
58 {}
59 
61 WriteQueue::allocate(Addr blk_addr, unsigned blk_size, PacketPtr pkt,
62  Tick when_ready, Counter order)
63 {
64  assert(!freeList.empty());
65  WriteQueueEntry *entry = freeList.front();
66  assert(entry->getNumTargets() == 0);
67  freeList.pop_front();
68 
69  entry->allocate(blk_addr, blk_size, pkt, when_ready, order);
70  entry->allocIter = allocatedList.insert(allocatedList.end(), entry);
71  entry->readyIter = addToReadyList(entry);
72 
73  allocated += 1;
74  return entry;
75 }
76 
77 void
79 {
80  // for a normal eviction, such as a writeback or a clean evict,
81  // there is no more to do as we are done from the perspective of
82  // this cache, and for uncacheable write we do not need the entry
83  // as part of the response handling
84  entry->popTarget();
85  deallocate(entry);
86 }
87 
88 } // namespace gem5
gem5::WriteQueue::markInService
void markInService(WriteQueueEntry *entry)
Mark the given entry as in service.
Definition: write_queue.cc:78
gem5::WriteQueue::WriteQueue
WriteQueue(const std::string &_label, int num_entries, int reserve, const std::string &name)
Create a write queue with a given number of entries.
Definition: write_queue.cc:54
gem5::WriteQueueEntry::allocIter
Iterator allocIter
Pointer to this entry on the allocated list.
Definition: write_queue_entry.hh:109
gem5::WriteQueue::allocate
WriteQueueEntry * allocate(Addr blk_addr, unsigned blk_size, PacketPtr pkt, Tick when_ready, Counter order)
Allocates a new WriteQueueEntry for the request and size.
Definition: write_queue.cc:61
gem5::Queue< WriteQueueEntry >::freeList
WriteQueueEntry ::List freeList
Holds non allocated entries.
Definition: queue.hh:102
gem5::Packet
A Packet is used to encapsulate a transfer between two objects in the memory system (e....
Definition: packet.hh:283
gem5::Tick
uint64_t Tick
Tick count type.
Definition: types.hh:58
gem5::Queue< WriteQueueEntry >::allocatedList
WriteQueueEntry ::List allocatedList
Holds pointers to all allocated entries.
Definition: queue.hh:98
gem5::WriteQueueEntry::allocate
void allocate(Addr blk_addr, unsigned blk_size, PacketPtr pkt, Tick when_ready, Counter _order)
Allocate a miss to this entry.
Definition: write_queue_entry.cc:90
gem5::Queue
A high-level queue interface, to be used by both the MSHR queue and the write buffer.
Definition: queue.hh:70
gem5::WriteQueueEntry::popTarget
void popTarget()
Pop first target.
Definition: write_queue_entry.hh:164
gem5::Addr
uint64_t Addr
Address type This will probably be moved somewhere else in the near future.
Definition: types.hh:147
gem5::Queue< WriteQueueEntry >::deallocate
virtual void deallocate(WriteQueueEntry *entry)
Removes the given entry from the queue.
Definition: queue.hh:241
name
const std::string & name()
Definition: trace.cc:49
gem5::WriteQueueEntry
Write queue entry.
Definition: write_queue_entry.hh:67
write_queue.hh
gem5::Queue< WriteQueueEntry >::addToReadyList
WriteQueueEntry ::Iterator addToReadyList(WriteQueueEntry *entry)
Definition: queue.hh:104
gem5::statistics::Counter
double Counter
All counters are of 64-bit values.
Definition: types.hh:47
gem5::WriteQueueEntry::getNumTargets
int getNumTargets() const
Returns the current number of allocated targets.
Definition: write_queue_entry.hh:142
gem5::WriteQueueEntry::readyIter
Iterator readyIter
Pointer to this entry on the ready list.
Definition: write_queue_entry.hh:103
gem5::Queue< WriteQueueEntry >::allocated
int allocated
The number of currently allocated entries.
Definition: queue.hh:123
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
write_queue_entry.hh

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