1/*
2 * Copyright (c) 2010-2014 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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210DRAMCtrl::decodeAddr(PacketPtr pkt, Addr dramPktAddr, unsigned size,
211 bool isRead)
212{
213 // decode the address based on the address mapping scheme, with
214 // Ro, Ra, Co, Ba and Ch denoting row, rank, column, bank and
215 // channel, respectively
216 uint8_t rank;
217 uint8_t bank;
218 // use a 64-bit unsigned during the computations as the row is
219 // always the top bits, and check before creating the DRAMPacket
220 uint64_t row;
221
222 // truncate the address to the access granularity
223 Addr addr = dramPktAddr / burstSize;
224
225 // we have removed the lowest order address bits that denote the
226 // position within the column
227 if (addrMapping == Enums::RoRaBaChCo) {
228 // the lowest order bits denote the column to ensure that

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291 row = addr % rowsPerBank;
292 addr = addr / rowsPerBank;
293 } else
294 panic("Unknown address mapping policy chosen!");
295
296 assert(rank < ranksPerChannel);
297 assert(bank < banksPerRank);
298 assert(row < rowsPerBank);
299 assert(row < Bank::NO_ROW);
300
301 DPRINTF(DRAM, "Address: %lld Rank %d Bank %d Row %d\n",
302 dramPktAddr, rank, bank, row);
303
304 // create the corresponding DRAM packet with the entry time and
305 // ready time set to the current tick, the latter will be updated
306 // later
307 uint16_t bank_id = banksPerRank * rank + bank;

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748
749 DPRINTF(DRAM, "Done\n");
750
751 return;
752}
753
754void
755DRAMCtrl::activateBank(Tick act_tick, uint8_t rank, uint8_t bank,
756 uint32_t row, Bank& bank_ref)
757{
758 assert(0 <= rank && rank < ranksPerChannel);
759 assert(actTicks[rank].size() == activationLimit);
760
761 DPRINTF(DRAM, "Activate at tick %d\n", act_tick);
762
763 // update the open row
764 assert(bank_ref.openRow == Bank::NO_ROW);

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