60317f99fe
This change adds an hbm memory controller in gem5, which is capable of controlling two hbm memory interfaces (two pseudo channels). HBMCtrl inherits from MemCtrl and tries to reuse most of the MemCtrl functions for two different dram interfaces. Morever, a notion of pseudo channel is added in the memory interface itself, to make sure that the scheduling decisions in any interface are based on the pkts for that pseudo channel only. Also, the command bandwidth checks are divided into row and column commands, which are shared by both pseudo channels. Change-Id: Ie2ee8183d0f7f744aff2ed05cabc75fec3ea2171 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/59732 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Reviewed-by: Wendy Elsasser <welsasser@rambus.com> Tested-by: kokoro <noreply+kokoro@google.com>
88 lines
3.5 KiB
C++
88 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2010-2020 ARM Limited
|
|
* All rights reserved
|
|
*
|
|
* The license below extends only to copyright in the software and shall
|
|
* not be construed as granting a license to any other intellectual
|
|
* property including but not limited to intellectual property relating
|
|
* to a hardware implementation of the functionality of the software
|
|
* licensed hereunder. You may use the software subject to the license
|
|
* terms below provided that you ensure that this notice is replicated
|
|
* unmodified and in its entirety in all distributions of the software,
|
|
* modified or unmodified, in source code or in binary form.
|
|
*
|
|
* Copyright (c) 2013 Amin Farmahini-Farahani
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met: redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer;
|
|
* redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution;
|
|
* neither the name of the copyright holders nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "mem/mem_interface.hh"
|
|
|
|
#include "base/bitfield.hh"
|
|
#include "base/cprintf.hh"
|
|
#include "base/trace.hh"
|
|
#include "sim/system.hh"
|
|
|
|
namespace gem5
|
|
{
|
|
|
|
namespace memory
|
|
{
|
|
|
|
MemInterface::MemInterface(const MemInterfaceParams &_p)
|
|
: AbstractMemory(_p),
|
|
addrMapping(_p.addr_mapping),
|
|
burstSize((_p.devices_per_rank * _p.burst_length *
|
|
_p.device_bus_width) / 8),
|
|
deviceSize(_p.device_size),
|
|
deviceRowBufferSize(_p.device_rowbuffer_size),
|
|
devicesPerRank(_p.devices_per_rank),
|
|
rowBufferSize(devicesPerRank * deviceRowBufferSize),
|
|
burstsPerRowBuffer(rowBufferSize / burstSize),
|
|
burstsPerStripe(range.interleaved() ?
|
|
range.granularity() / burstSize : 1),
|
|
ranksPerChannel(_p.ranks_per_channel),
|
|
banksPerRank(_p.banks_per_rank), rowsPerBank(0),
|
|
tCK(_p.tCK), tCS(_p.tCS), tBURST(_p.tBURST),
|
|
tRTW(_p.tRTW),
|
|
tWTR(_p.tWTR),
|
|
readBufferSize(_p.read_buffer_size),
|
|
writeBufferSize(_p.write_buffer_size),
|
|
numWritesQueued(0)
|
|
{}
|
|
|
|
void
|
|
MemInterface::setCtrl(MemCtrl* _ctrl, unsigned int command_window,
|
|
uint8_t pseudo_channel)
|
|
{
|
|
ctrl = _ctrl;
|
|
maxCommandsPerWindow = command_window / tCK;
|
|
// setting the pseudo channel number for this interface
|
|
pseudoChannel = pseudo_channel;
|
|
}
|
|
|
|
} // namespace memory
|
|
} // namespace gem5
|