138 lines
4.4 KiB
C++
138 lines
4.4 KiB
C++
/*
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* Copyright (c) 2009 Princeton University
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* Copyright (c) 2009 The Regents of the University of California
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Hangsheng Wang (Orion 1.0, Princeton)
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* Xinping Zhu (Orion 1.0, Princeton)
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* Xuning Chen (Orion 1.0, Princeton)
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* Bin Li (Orion 2.0, Princeton)
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* Kambiz Samadi (Orion 2.0, UC San Diego)
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*/
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#include "base/misc.hh"
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#include "mem/ruby/network/orion/Buffer/PrechargeUnit.hh"
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#include "mem/ruby/network/orion/Buffer/SRAM.hh"
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#include "mem/ruby/network/orion/TechParameter.hh"
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PrechargeUnit::PrechargeUnit(
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const string& pre_model_str_,
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double pre_load_,
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const SRAM* sram_ptr_,
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const TechParameter* tech_param_ptr_
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)
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{
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if (pre_model_str_ == "SINGLE_BITLINE")
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{
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m_pre_model = SINGLE_BITLINE;
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}
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else if (pre_model_str_ == "EQU_BITLINE")
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{
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m_pre_model = EQU_BITLINE;
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}
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else if (pre_model_str_ == "SINGLE_OTHER")
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{
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m_pre_model = SINGLE_OTHER;
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}
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else
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{
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m_pre_model = NO_MODEL;
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}
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if (m_pre_model != NO_MODEL)
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{
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m_pre_load = pre_load_;
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m_sram_ptr = sram_ptr_;
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m_tech_param_ptr = tech_param_ptr_;
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init();
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}
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}
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PrechargeUnit::~PrechargeUnit()
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{
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}
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void PrechargeUnit::init()
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{
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double period = m_tech_param_ptr->get_period();
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m_pre_size = m_tech_param_ptr->calc_driver_psize(m_pre_load, period/8.0);
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//FIXME - shouldn't be added
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double Wdecinvn = m_tech_param_ptr->get_Wdecinvn();
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double Wdecinvp = m_tech_param_ptr->get_Wdecinvp();
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m_pre_size += m_pre_size*Wdecinvn/Wdecinvp;
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uint32_t num_gate = calc_num_pre_gate();
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// WHS: 10 should go to PARM
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double e_factor = m_tech_param_ptr->get_EnergyFactor();
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m_e_charge_gate = calc_pre_cap(m_pre_size, 10) * num_gate * e_factor;
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uint32_t num_data_end = m_sram_ptr->get_num_data_end();
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if (num_data_end == 2)
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{
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e_factor = m_tech_param_ptr->get_SenseEnergyFactor();
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}
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else
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{
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e_factor = m_tech_param_ptr->get_EnergyFactor();
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}
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uint32_t num_drain = calc_num_pre_drain();
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m_e_charge_drain = m_tech_param_ptr->calc_draincap(m_pre_size, TechParameter::PCH, 1)*num_drain*e_factor;
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// static power
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double PMOS_TAB_0 = m_tech_param_ptr->get_PMOS_TAB(0);
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m_i_static = num_gate*m_pre_size*PMOS_TAB_0;
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}
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uint32_t PrechargeUnit::calc_num_pre_gate()
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{
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switch(m_pre_model)
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{
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case SINGLE_BITLINE: return 2;
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case EQU_BITLINE: return 3;
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case SINGLE_OTHER: return 1;
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default: fatal("Incorrect Precharge Unit model.\n");
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}
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}
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uint32_t PrechargeUnit::calc_num_pre_drain()
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{
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switch(m_pre_model)
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{
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case SINGLE_BITLINE: return 1;
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case EQU_BITLINE: return 2;
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case SINGLE_OTHER: return 1;
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default: fatal("Incorrect Precharge Unit model.\n");
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}
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}
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double PrechargeUnit::calc_pre_cap(double width_, double length_)
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{
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return m_tech_param_ptr->calc_gatecap(width_, length_);
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}
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