163 lines
5.8 KiB
C++
163 lines
5.8 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 <cmath>
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#include <iostream>
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#include "mem/ruby/network/orion/Crossbar/MultreeCrossbar.hh"
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#include "mem/ruby/network/orion/TechParameter.hh"
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using namespace std;
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MultreeCrossbar::MultreeCrossbar(
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const string& conn_type_str_,
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const string& trans_type_str_,
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uint32_t num_in_,
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uint32_t num_out_,
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uint32_t data_width_,
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uint32_t degree_,
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const TechParameter *tech_param_ptr_
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) : Crossbar(
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MULTREE_CROSSBAR, conn_type_str_, trans_type_str_,
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num_in_, num_out_, data_width_, 0, 0, degree_, tech_param_ptr_)
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{
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m_len_req_wire = 0;
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init();
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}
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MultreeCrossbar::~MultreeCrossbar()
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{}
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double MultreeCrossbar::get_dynamic_energy(bool is_max_) const
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{
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double e_atomic;
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double e_access = 0;
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e_atomic = m_e_chg_in*m_data_width*(is_max_? 1:0.5);
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e_access += e_atomic;
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e_atomic = m_e_chg_out*m_data_width*(is_max_? 1:0.5);
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e_access += e_atomic;
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e_atomic = m_e_chg_ctr;
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e_access += e_atomic;
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if (m_depth > 1)
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{
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e_atomic = m_e_chg_int*m_data_width*(m_depth-1)*(is_max_? 1:0.5);
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e_access += e_atomic;
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}
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return e_access;
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}
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void MultreeCrossbar::init()
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{
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double CrsbarCellWidth = m_tech_param_ptr->get_CrsbarCellWidth();
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double CCmetal = m_tech_param_ptr->get_CCmetal();
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double Lamda = m_tech_param_ptr->get_Lamda();
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double CC3metal = m_tech_param_ptr->get_CC3metal();
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double len_in_wire;
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// input wire horizontal segment length
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len_in_wire = m_num_in*m_data_width*CrsbarCellWidth*(m_num_out/2);
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m_cap_in_wire = len_in_wire*CCmetal;
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// input wire vertical segment length
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len_in_wire = m_num_in*m_data_width*(5*Lamda)*(m_num_out/2);
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m_cap_in_wire += len_in_wire*CC3metal;
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m_cap_out_wire = 0;
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double Cmetal = m_tech_param_ptr->get_Cmetal();
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double len_ctr_wire = m_num_in*m_data_width*CrsbarCellWidth*(m_num_out/2)/2;
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m_cap_ctr_wire = Cmetal*len_ctr_wire;
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double e_factor = m_tech_param_ptr->get_EnergyFactor();
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m_e_chg_in = calc_in_cap()*e_factor;
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m_e_chg_out = calc_out_cap(m_degree)*e_factor;
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m_e_chg_int = calc_int_cap()*e_factor;
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m_depth = (uint32_t)ceil(log((double)m_num_in)/log((double)m_degree));
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// control signal should reset after transmission is done
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if (m_depth == 1)
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{
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// only one level of control sigal
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m_e_chg_ctr = calc_ctr_cap(m_cap_ctr_wire, 0, 0)*e_factor;
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}
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else
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{
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// first level and last level control signals
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m_e_chg_ctr = calc_ctr_cap(m_cap_ctr_wire, 0, 1)*e_factor + calc_ctr_cap(0, 1, 0)*e_factor;
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// intermediate control signals
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if (m_depth > 2)
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{
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m_e_chg_ctr += (m_depth-2)*calc_ctr_cap(0, 1, 1)*e_factor;
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}
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}
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m_i_static = calc_i_static();
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}
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double MultreeCrossbar::calc_i_static()
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{
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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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double Woutdrivern = m_tech_param_ptr->get_Woutdrivern();
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double Woutdriverp = m_tech_param_ptr->get_Woutdriverp();
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double WdecNORn = m_tech_param_ptr->get_WdecNORn();
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double WdecNORp = m_tech_param_ptr->get_WdecNORp();
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double NOR2_TAB_0 = m_tech_param_ptr->get_NOR2_TAB(0);
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double NOR2_TAB_1 = m_tech_param_ptr->get_NOR2_TAB(1);
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double NOR2_TAB_2 = m_tech_param_ptr->get_NOR2_TAB(2);
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double NOR2_TAB_3 = m_tech_param_ptr->get_NOR2_TAB(3);
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double NMOS_TAB_0 = m_tech_param_ptr->get_NMOS_TAB(0);
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double PMOS_TAB_0 = m_tech_param_ptr->get_PMOS_TAB(0);
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double i_static = 0;
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// input driver
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i_static += (Wdecinvn*NMOS_TAB_0+Wdecinvp*PMOS_TAB_0)*m_num_in*m_data_width;
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// output driver
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i_static += (Woutdrivern*NMOS_TAB_0+Woutdriverp*PMOS_TAB_0)*m_num_out*m_data_width;
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// mux
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i_static += (WdecNORp*NOR2_TAB_0+WdecNORn*(NOR2_TAB_1+NOR2_TAB_2+NOR2_TAB_3))/4*(2*m_num_in-1)*m_num_out*m_data_width;
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// control signal inverter
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i_static += (Wdecinvn*NMOS_TAB_0+Wdecinvp*PMOS_TAB_0)*m_num_in*m_num_out;
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return i_static;
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}
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