diff options
Diffstat (limited to 'src/mem')
| -rw-r--r-- | src/mem/SimpleDRAM.py | 10 | ||||
| -rw-r--r-- | src/mem/simple_dram.cc | 22 |
2 files changed, 17 insertions, 15 deletions
diff --git a/src/mem/SimpleDRAM.py b/src/mem/SimpleDRAM.py index 864ddfc31..9cc56189e 100644 --- a/src/mem/SimpleDRAM.py +++ b/src/mem/SimpleDRAM.py @@ -43,10 +43,12 @@ from AbstractMemory import * # First-Served and a First-Row Hit then First-Come First-Served class MemSched(Enum): vals = ['fcfs', 'frfcfs'] -# Enum for the address mapping, currently corresponding to either +# Enum for the address mapping. With Ra, Co, Ba and Ch denoting rank, +# column, bank and channel, respectively, and going from MSB to LSB, +# the two schemes available are RaBaChCo and CoRaBaCh, either # optimising for sequential accesses hitting in the open row, or -# striping across banks. -class AddrMap(Enum): vals = ['openmap', 'closemap'] +# maximising parallelism. +class AddrMap(Enum): vals = ['RaBaChCo', 'CoRaBaCh'] # Enum for the page policy, either open or close. class PageManage(Enum): vals = ['open', 'close'] @@ -105,7 +107,7 @@ class SimpleDRAM(AbstractMemory): # scheduler, address map and page policy mem_sched_policy = Param.MemSched('frfcfs', "Memory scheduling policy") - addr_mapping = Param.AddrMap('openmap', "Address mapping policy") + addr_mapping = Param.AddrMap('RaBaChCo', "Address mapping policy") page_policy = Param.PageManage('open', "Page closure management policy") # the physical organisation of the DRAM diff --git a/src/mem/simple_dram.cc b/src/mem/simple_dram.cc index 0b24b4056..bb9230e97 100644 --- a/src/mem/simple_dram.cc +++ b/src/mem/simple_dram.cc @@ -112,15 +112,15 @@ SimpleDRAM::init() panic("%s has %d interleaved address stripes but %d channel(s)\n", name(), range.stripes(), channels); - if (addrMapping == Enums::openmap) { + if (addrMapping == Enums::RaBaChCo) { if (bytesPerCacheLine * linesPerRowBuffer != range.granularity()) { - panic("Interleaving of %s doesn't match open address map\n", + panic("Interleaving of %s doesn't match RaBaChCo address map\n", name()); } - } else if (addrMapping == Enums::closemap) { + } else if (addrMapping == Enums::CoRaBaCh) { if (bytesPerCacheLine != range.granularity()) - panic("Interleaving of %s doesn't match closed address map\n", + panic("Interleaving of %s doesn't match CoRaBaCh address map\n", name()); } } @@ -175,9 +175,9 @@ SimpleDRAM::decodeAddr(PacketPtr pkt) { // decode the address based on the address mapping scheme // - // with R, C, B and K denoting rank, column, bank and rank, + // with Ra, Co, Ba and Ch denoting rank, column, bank and channel, // respectively, and going from MSB to LSB, the two schemes are - // RKBC (openmap) and RCKB (closedmap) + // RaBaChCo and CoRaBaCh uint8_t rank; uint16_t bank; uint16_t row; @@ -191,7 +191,7 @@ SimpleDRAM::decodeAddr(PacketPtr pkt) // position within the cache line, proceed and select the // appropriate bits for bank, rank and row (no column address is // needed) - if (addrMapping == Enums::openmap) { + if (addrMapping == Enums::RaBaChCo) { // the lowest order bits denote the column to ensure that // sequential cache lines occupy the same row addr = addr / linesPerRowBuffer; @@ -201,7 +201,7 @@ SimpleDRAM::decodeAddr(PacketPtr pkt) // controllers in the address mapping addr = addr / channels; - // after the column bits, we get the bank bits to interleave + // after the channel bits, we get the bank bits to interleave // over the banks bank = addr % banksPerRank; addr = addr / banksPerRank; @@ -214,7 +214,7 @@ SimpleDRAM::decodeAddr(PacketPtr pkt) // lastly, get the row bits row = addr % rowsPerBank; addr = addr / rowsPerBank; - } else if (addrMapping == Enums::closemap) { + } else if (addrMapping == Enums::CoRaBaCh) { // optimise for closed page mode and utilise maximum // parallelism of the DRAM (at the cost of power) @@ -473,8 +473,8 @@ SimpleDRAM::printParams() const linesPerRowBuffer * rowsPerBank * banksPerRank * ranksPerChannel); string scheduler = memSchedPolicy == Enums::fcfs ? "FCFS" : "FR-FCFS"; - string address_mapping = addrMapping == Enums::openmap ? "OPENMAP" : - "CLOSEMAP"; + string address_mapping = addrMapping == Enums::RaBaChCo ? "RaBaChCo" : + "CoRaBaCh"; string page_policy = pageMgmt == Enums::open ? "OPEN" : "CLOSE"; DPRINTF(DRAM, |