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Diffstat (limited to 'src/mem/ruby/network/orion/Buffer/DecoderUnit.cc')
-rw-r--r-- | src/mem/ruby/network/orion/Buffer/DecoderUnit.cc | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/src/mem/ruby/network/orion/Buffer/DecoderUnit.cc b/src/mem/ruby/network/orion/Buffer/DecoderUnit.cc new file mode 100644 index 000000000..101efdf5e --- /dev/null +++ b/src/mem/ruby/network/orion/Buffer/DecoderUnit.cc @@ -0,0 +1,171 @@ +/* + * Copyright (c) 2009 Princeton University, and + * 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; +} + |