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-rw-r--r--src/mem/ruby/network/orion/Buffer/DecoderUnit.cc171
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diff --git a/src/mem/ruby/network/orion/Buffer/DecoderUnit.cc b/src/mem/ruby/network/orion/Buffer/DecoderUnit.cc
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-/*
- * 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 <cmath>
-
-#include "mem/ruby/network/orion/Buffer/DecoderUnit.hh"
-#include "mem/ruby/network/orion/TechParameter.hh"
-
-using namespace std;
-
-DecoderUnit::DecoderUnit(
- const string& dec_model_str_,
- uint32_t dec_width_,
- const TechParameter* tech_param_ptr_
- )
-{
- if (dec_model_str_.compare("GENERIC_DEC") == 0)
- {
- m_dec_model = GENERIC_DEC;
- }
- else
- {
- m_dec_model = NO_MODEL;
- }
-
- if (m_dec_model != NO_MODEL)
- {
- m_dec_width = dec_width_;
- m_tech_param_ptr = tech_param_ptr_;
-
- init();
- }
-}
-
-DecoderUnit::~DecoderUnit()
-{
-}
-
-void DecoderUnit::init()
-{
- if (m_dec_width >= 4)
- { // 2-level decoder
- m_num_in_1st = (m_dec_width == 4)? 2:3;
- m_num_out_0th = 1 << (m_num_in_1st - 1);
- m_num_in_2nd = (uint32_t)ceil((double)m_dec_width/(double)m_num_in_1st);
- m_num_out_1st = 1 << (m_dec_width - m_num_in_1st);
- }
- else if (m_dec_width >= 2)
- { // 1-level decoder
- m_num_in_1st = m_dec_width;
- m_num_out_0th = 1 << (m_num_in_1st - 1);
- m_num_in_2nd = m_num_out_1st = 0;
- }
- else
- {
- m_num_in_1st = m_num_out_0th = m_num_in_2nd = m_num_out_1st = 0;
- }
-
- // compute energy constants
- double e_factor = m_tech_param_ptr->get_vdd() * m_tech_param_ptr->get_vdd();
- if (m_dec_width >= 4)
- {
- m_e_chg_l1 = calc_chgl1_cap() * e_factor;
- m_e_chg_output = calc_select_cap() * e_factor;
- }
- else if (m_dec_width >= 2)
- {
- m_e_chg_l1 = calc_chgl1_cap() * e_factor;
- m_e_chg_output = 0;
- }
- else
- {
- m_e_chg_l1 = m_e_chg_output = 0;
- }
- m_e_chg_addr = calc_chgaddr_cap() * e_factor;
-
- return;
-}
-
-double DecoderUnit::calc_chgl1_cap()
-{
- double total_cap;
-
- // part 1: drain cap of level-1 decoder
- double Wdec3to8p = m_tech_param_ptr->get_Wdec3to8p();
- double Wdec3to8n = m_tech_param_ptr->get_Wdec3to8n();
- total_cap = m_num_in_1st * m_tech_param_ptr->calc_draincap(Wdec3to8p, TechParameter::PCH, 1) + m_tech_param_ptr->calc_draincap(Wdec3to8n, TechParameter::NCH, m_num_in_1st);
-
- /* part 2: gate cap of level-2 decoder */
- /* WHS: 40 and 20 should go to PARM */
- double WdecNORn = m_tech_param_ptr->get_WdecNORn();
- double WdecNORp = m_tech_param_ptr->get_WdecNORp();
- total_cap += m_num_out_0th*m_tech_param_ptr->calc_gatecap((WdecNORn+WdecNORp), m_num_in_2nd*40 + 20);
-
- return total_cap;
-}
-
-double DecoderUnit::calc_select_cap()
-{
- double total_cap;
-
- // part 1: drain cap of last level decoders
- double WdecNORp = m_tech_param_ptr->get_WdecNORp();
- double WdecNORn = m_tech_param_ptr->get_WdecNORn();
- total_cap = m_num_in_2nd * m_tech_param_ptr->calc_draincap(WdecNORn, TechParameter::NCH, 1) + m_tech_param_ptr->calc_draincap(WdecNORp, TechParameter::PCH, m_num_in_2nd);
-
- // part 2: output inverter
- // WHS: 20 should go to PARM
- double Wdecinvp = m_tech_param_ptr->get_Wdecinvp();
- double Wdecinvn = m_tech_param_ptr->get_Wdecinvn();
- total_cap += m_tech_param_ptr->calc_draincap(Wdecinvn, TechParameter::NCH, 1) + m_tech_param_ptr->calc_draincap(Wdecinvp, TechParameter::PCH, 1) + m_tech_param_ptr->calc_gatecap(Wdecinvn + Wdecinvp, 20);
-
- return total_cap;
-}
-
-double DecoderUnit::calc_chgaddr_cap()
-{
- double total_cap;
-
- // stage 1: input driver
- double Wdecdrivep = m_tech_param_ptr->get_Wdecdrivep();
- double Wdecdriven = m_tech_param_ptr->get_Wdecdriven();
- total_cap = m_tech_param_ptr->calc_draincap(Wdecdrivep, TechParameter::PCH, 1) + m_tech_param_ptr->calc_draincap(Wdecdriven, TechParameter::NCH, 1) + m_tech_param_ptr->calc_gatecap(Wdecdriven, 1);
-
- /* inverter to produce complement addr, this needs 1/2 */
- /* WHS: assume Wdecinv(np) for this inverter */
- double Wdecinvp = m_tech_param_ptr->get_Wdecinvp();
- double Wdecinvn = m_tech_param_ptr->get_Wdecinvn();
- total_cap += (m_tech_param_ptr->calc_draincap(Wdecinvp, TechParameter::PCH, 1) + m_tech_param_ptr->calc_draincap(Wdecinvn, TechParameter::NCH, 1) + m_tech_param_ptr->calc_gatecap(Wdecinvp, 1) + m_tech_param_ptr->calc_gatecap(Wdecinvn, 1)) / 2;
-
- /* stage 2: gate cap of level-1 decoder */
- /* WHS: 10 should go to PARM */
- double Wdec3to8p = m_tech_param_ptr->get_Wdec3to8p();
- double Wdec3to8n = m_tech_param_ptr->get_Wdec3to8n();
- total_cap += m_num_out_0th*m_tech_param_ptr->calc_gatecap( Wdec3to8n + Wdec3to8p, 10 );
-
- return total_cap;
-}
-
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