diff options
Diffstat (limited to 'src/mem/simple_dram.hh')
| -rw-r--r-- | src/mem/simple_dram.hh | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/src/mem/simple_dram.hh b/src/mem/simple_dram.hh index edba58774..19d23efba 100644 --- a/src/mem/simple_dram.hh +++ b/src/mem/simple_dram.hh @@ -39,6 +39,7 @@ * * Authors: Andreas Hansson * Ani Udipi + * Neha Agarwal */ /** @@ -202,10 +203,17 @@ class SimpleDRAM : public AbstractMemory /** Will be populated by address decoder */ const uint8_t rank; - const uint16_t bank; + const uint8_t bank; const uint16_t row; /** + * Bank id is calculated considering banks in all the ranks + * eg: 2 ranks each with 8 banks, then bankId = 0 --> rank0, bank0 and + * bankId = 8 --> rank1, bank0 + */ + const uint16_t bankId; + + /** * The starting address of the DRAM packet. * This address could be unaligned to burst size boundaries. The * reason is to keep the address offset so we can accurately check @@ -224,14 +232,15 @@ class SimpleDRAM : public AbstractMemory * If not a split packet (common case), this is set to NULL */ BurstHelper* burstHelper; - Bank& bank_ref; + Bank& bankRef; - DRAMPacket(PacketPtr _pkt, bool _isRead, uint8_t _rank, uint16_t _bank, - uint16_t _row, Addr _addr, unsigned int _size, - Bank& _bank_ref) + DRAMPacket(PacketPtr _pkt, bool is_read, uint8_t _rank, uint8_t _bank, + uint16_t _row, uint16_t bank_id, Addr _addr, + unsigned int _size, Bank& bank_ref) : entryTime(curTick()), readyTime(curTick()), - pkt(_pkt), isRead(_isRead), rank(_rank), bank(_bank), row(_row), - addr(_addr), size(_size), burstHelper(NULL), bank_ref(_bank_ref) + pkt(_pkt), isRead(is_read), rank(_rank), bank(_bank), row(_row), + bankId(bank_id), addr(_addr), size(_size), burstHelper(NULL), + bankRef(bank_ref) { } }; @@ -394,6 +403,14 @@ class SimpleDRAM : public AbstractMemory */ Tick maxBankFreeAt() const; + /** + * Find which are the earliest available banks for the enqueued + * requests. Assumes maximum of 64 banks per DIMM + * + * @param Queued requests to consider + * @return One-hot encoded mask of bank indices + */ + uint64_t minBankFreeAt(const std::deque<DRAMPacket*>& queue) const; /** * Keep track of when row activations happen, in order to enforce |