| /* |
| * Copyright (c) 2009 Princeton University |
| * Copyright (c) 2009 The Regents of the University of California |
| * 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. |
| * |
| * Authors: Hangsheng Wang (Orion 1.0, Princeton) |
| * Xinping Zhu (Orion 1.0, Princeton) |
| * Xuning Chen (Orion 1.0, Princeton) |
| * Bin Li (Orion 2.0, Princeton) |
| * Kambiz Samadi (Orion 2.0, UC San Diego) |
| */ |
| |
| #include "base/misc.hh" |
| #include "mem/ruby/network/orion/Buffer/PrechargeUnit.hh" |
| #include "mem/ruby/network/orion/Buffer/SRAM.hh" |
| #include "mem/ruby/network/orion/TechParameter.hh" |
| |
| PrechargeUnit::PrechargeUnit( |
| const string& pre_model_str_, |
| double pre_load_, |
| const SRAM* sram_ptr_, |
| const TechParameter* tech_param_ptr_ |
| ) |
| { |
| if (pre_model_str_ == "SINGLE_BITLINE") |
| { |
| m_pre_model = SINGLE_BITLINE; |
| } |
| else if (pre_model_str_ == "EQU_BITLINE") |
| { |
| m_pre_model = EQU_BITLINE; |
| } |
| else if (pre_model_str_ == "SINGLE_OTHER") |
| { |
| m_pre_model = SINGLE_OTHER; |
| } |
| else |
| { |
| m_pre_model = NO_MODEL; |
| } |
| |
| if (m_pre_model != NO_MODEL) |
| { |
| m_pre_load = pre_load_; |
| m_sram_ptr = sram_ptr_; |
| m_tech_param_ptr = tech_param_ptr_; |
| |
| init(); |
| } |
| } |
| |
| PrechargeUnit::~PrechargeUnit() |
| { |
| } |
| |
| void PrechargeUnit::init() |
| { |
| double period = m_tech_param_ptr->get_period(); |
| m_pre_size = m_tech_param_ptr->calc_driver_psize(m_pre_load, period/8.0); |
| //FIXME - shouldn't be added |
| double Wdecinvn = m_tech_param_ptr->get_Wdecinvn(); |
| double Wdecinvp = m_tech_param_ptr->get_Wdecinvp(); |
| m_pre_size += m_pre_size*Wdecinvn/Wdecinvp; |
| |
| uint32_t num_gate = calc_num_pre_gate(); |
| |
| // WHS: 10 should go to PARM |
| double e_factor = m_tech_param_ptr->get_EnergyFactor(); |
| m_e_charge_gate = calc_pre_cap(m_pre_size, 10) * num_gate * e_factor; |
| |
| uint32_t num_data_end = m_sram_ptr->get_num_data_end(); |
| if (num_data_end == 2) |
| { |
| e_factor = m_tech_param_ptr->get_SenseEnergyFactor(); |
| } |
| else |
| { |
| e_factor = m_tech_param_ptr->get_EnergyFactor(); |
| } |
| uint32_t num_drain = calc_num_pre_drain(); |
| m_e_charge_drain = m_tech_param_ptr->calc_draincap(m_pre_size, TechParameter::PCH, 1)*num_drain*e_factor; |
| |
| // static power |
| double PMOS_TAB_0 = m_tech_param_ptr->get_PMOS_TAB(0); |
| m_i_static = num_gate*m_pre_size*PMOS_TAB_0; |
| } |
| |
| uint32_t PrechargeUnit::calc_num_pre_gate() |
| { |
| switch(m_pre_model) |
| { |
| case SINGLE_BITLINE: return 2; |
| case EQU_BITLINE: return 3; |
| case SINGLE_OTHER: return 1; |
| default: fatal("Incorrect Precharge Unit model.\n"); |
| } |
| } |
| |
| uint32_t PrechargeUnit::calc_num_pre_drain() |
| { |
| switch(m_pre_model) |
| { |
| case SINGLE_BITLINE: return 1; |
| case EQU_BITLINE: return 2; |
| case SINGLE_OTHER: return 1; |
| default: fatal("Incorrect Precharge Unit model.\n"); |
| } |
| } |
| |
| double PrechargeUnit::calc_pre_cap(double width_, double length_) |
| { |
| return m_tech_param_ptr->calc_gatecap(width_, length_); |
| } |
| |