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/*******************************************************************************
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    OpenAirInterface
    Copyright(c) 1999 - 2014 Eurecom
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    OpenAirInterface is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
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    OpenAirInterface is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
    along with OpenAirInterface.The full GNU General Public License is
    included in this distribution in the file called "COPYING". If not,
    see <http://www.gnu.org/licenses/>.
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  Contact Information
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  OpenAirInterface Admin: openair_admin@eurecom.fr
  OpenAirInterface Tech : openair_tech@eurecom.fr
  OpenAirInterface Dev  : openair4g-devel@eurecom.fr

  Address      : Eurecom, Compus SophiaTech 450, route des chappes, 06451 Biot, France.
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*******************************************************************************/
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/*! \file main.c
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 * \brief top init of Layer 2
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 * \author  Navid Nikaein and Raymond Knopp 
 * \date 2010 - 2014
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 * \version 1.0
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 * \email: navid.nikaein@eurecom.fr
 * @ingroup _mac
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 */
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#ifdef USER_MODE
#include "LAYER2/register.h"
#else
#ifdef KERNEL2_6
//#include <linux/config.h>
#include <linux/slab.h>
#endif

#ifdef KERNEL2_4
#include <linux/malloc.h>
#include <linux/wrapper.h>
#endif


#endif //USER_MODE

#include "defs.h"
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#include "proto.h"
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#include "extern.h"
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#include "assertions.h"
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#include "PHY_INTERFACE/extern.h"
#include "PHY_INTERFACE/defs.h"
#include "PHY/defs.h"
#include "SCHED/defs.h"
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#include "LAYER2/PDCP_v10.1.0/pdcp.h"
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#include "RRC/LITE/defs.h"
#include "UTIL/LOG/log.h"
#include "RRC/L2_INTERFACE/openair_rrc_L2_interface.h"
#ifdef PHY_EMUL
#include "SIMULATION/simulation_defs.h"
#endif //PHY_EMUL

#include "SCHED/defs.h"

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void dl_phy_sync_success(module_id_t   module_idP,
    frame_t       frameP,
    unsigned char eNB_index,
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    uint8_t            first_sync){  //init as MR
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  LOG_D(MAC,"[UE %d] Frame %d: PHY Sync to eNB_index %d successful \n", module_idP, frameP, eNB_index);
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  if (first_sync==1) {
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      layer2_init_UE(module_idP);
      openair_rrc_ue_init(module_idP,eNB_index);
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  }
  else {
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      mac_in_sync_ind(module_idP,frameP,eNB_index);
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  }
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}

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void mrbch_phy_sync_failure(module_id_t module_idP, frame_t frameP, uint8_t free_eNB_index){//init as CH
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  LOG_I(MAC,"[eNB %d] Frame %d: PHY Sync failure \n",module_idP,frameP);
  layer2_init_eNB(module_idP, free_eNB_index);
  openair_rrc_eNB_init(module_idP);
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}

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char layer2_init_eNB(module_id_t module_idP, unsigned char eNB_index){
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  return 0;

}

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char layer2_init_UE(module_id_t module_idP){

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  return 0;
}

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void mac_UE_out_of_sync_ind(module_id_t module_idP, frame_t frameP, uint16_t eNB_index){
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  //  Mac_rlc_xface->mac_out_of_sync_ind(Mod_id, frameP, eNB_index);
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}


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int mac_top_init(int eMBMS_active, uint8_t cba_group_active, uint8_t HO_active){
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  module_id_t    Mod_id,i,j;
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  RA_TEMPLATE *RA_template;
  UE_TEMPLATE *UE_template;
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  int size_bytes1,size_bytes2,size_bits1,size_bits2;
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  LOG_I(MAC,"[MAIN] Init function start:Nb_UE_INST=%d\n",NB_UE_INST);
  if (NB_UE_INST>0) {
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      UE_mac_inst = (UE_MAC_INST*)malloc16(NB_UE_INST*sizeof(UE_MAC_INST));
      if (UE_mac_inst == NULL) {
          LOG_C(MAC,"[MAIN] Can't ALLOCATE %d Bytes for %d UE_MAC_INST with size %d \n",NB_UE_INST*sizeof(UE_MAC_INST),NB_UE_INST,sizeof(UE_MAC_INST));
          mac_xface->macphy_exit("[MAC][MAIN] not enough memory for UEs \n");
      }
      LOG_D(MAC,"[MAIN] ALLOCATE %d Bytes for %d UE_MAC_INST @ %p\n",NB_UE_INST*sizeof(UE_MAC_INST),NB_UE_INST,UE_mac_inst);

      bzero(UE_mac_inst,NB_UE_INST*sizeof(UE_MAC_INST));
      for(i=0;i<NB_UE_INST; i++)
        ue_init_mac(i);

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  }
  else 
    UE_mac_inst = NULL;
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  LOG_I(MAC,"[MAIN] Init function start:Nb_eNB_INST=%d\n",NB_eNB_INST);
  if (NB_eNB_INST>0) {
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      eNB_mac_inst = (eNB_MAC_INST*)malloc16(NB_eNB_INST*sizeof(eNB_MAC_INST));
      if (eNB_mac_inst == NULL){
          LOG_D(MAC,"[MAIN] can't ALLOCATE %d Bytes for %d eNB_MAC_INST with size %d \n",NB_eNB_INST*sizeof(eNB_MAC_INST),NB_eNB_INST,sizeof(eNB_MAC_INST));
          mac_xface->macphy_exit("[MAC][MAIN] not enough memory for eNB \n");
      }
      LOG_D(MAC,"[MAIN] ALLOCATE %d Bytes for %d eNB_MAC_INST @ %p\n",NB_eNB_INST*sizeof(eNB_MAC_INST),NB_eNB_INST,eNB_mac_inst);
      bzero(eNB_mac_inst,NB_eNB_INST*sizeof(eNB_MAC_INST));
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  }
  else
    eNB_mac_inst = NULL;
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  for(Mod_id=0;Mod_id<NB_eNB_INST;Mod_id++){

#ifdef PHY_EMUL
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      Mac_rlc_xface->Is_cluster_head[Mod_id]=2;//0: MR, 1: CH, 2: not CH neither MR
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#endif
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      /*#ifdef Rel10
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    int n;
    for (n=0;n<4096;n++)
      eNB_mac_inst[Mod_id].MCH_pdu.payload[n] = taus();
    //    Mac_rlc_xface->Node_id[Mod_id]=NODE_ID[Mod_id];
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    #endif*/
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  }
  //  Mac_rlc_xface->frame=Mac_rlc_xface->frame;


  if (Is_rrc_registered == 1){
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      LOG_I(MAC,"[MAIN] calling RRC\n");
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#ifndef CELLULAR //nothing to be done yet for cellular
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      openair_rrc_top_init(eMBMS_active, cba_group_active,HO_active);
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#endif
  }
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  else {
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      LOG_I(MAC,"[MAIN] Running without an RRC\n");
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  }
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#ifndef USER_MODE
#ifndef PHY_EMUL
  LOG_I(MAC,"[MAIN] add openair2 proc\n");
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  ////  add_openair2_stats();
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#endif
#endif

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  //init_transport_channels(2);
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  // Set up DCIs for TDD 5MHz Config 1..6

  for (i=0;i<NB_eNB_INST;i++) {
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      LOG_D(MAC,"[MAIN][eNB %d] initializing RA_template\n",i);
      LOG_D(MAC, "[MSC_NEW][FRAME 00000][MAC_eNB][MOD %02d][]\n", i);

      RA_template = (RA_TEMPLATE *)&eNB_mac_inst[i].RA_template[0];
      for (j=0;j<NB_RA_PROC_MAX;j++) {
          if (mac_xface->lte_frame_parms->frame_type == TDD) {
              switch (mac_xface->lte_frame_parms->N_RB_DL) {
              case 6:
                size_bytes1 = sizeof(DCI1A_1_5MHz_TDD_1_6_t);
                size_bytes2 = sizeof(DCI1A_1_5MHz_TDD_1_6_t);
                size_bits1 = sizeof_DCI1A_1_5MHz_TDD_1_6_t;
                size_bits2 = sizeof_DCI1A_1_5MHz_TDD_1_6_t;
                break;
              case 25:
                size_bytes1 = sizeof(DCI1A_5MHz_TDD_1_6_t);
                size_bytes2 = sizeof(DCI1A_5MHz_TDD_1_6_t);
                size_bits1 = sizeof_DCI1A_5MHz_TDD_1_6_t;
                size_bits2 = sizeof_DCI1A_5MHz_TDD_1_6_t;
                break;
              case 50:
                size_bytes1 = sizeof(DCI1A_10MHz_TDD_1_6_t);
                size_bytes2 = sizeof(DCI1A_10MHz_TDD_1_6_t);
                size_bits1 = sizeof_DCI1A_10MHz_TDD_1_6_t;
                size_bits2 = sizeof_DCI1A_10MHz_TDD_1_6_t;
                break;
              case 100:
                size_bytes1 = sizeof(DCI1A_20MHz_TDD_1_6_t);
                size_bytes2 = sizeof(DCI1A_20MHz_TDD_1_6_t);
                size_bits1 = sizeof_DCI1A_20MHz_TDD_1_6_t;
                size_bits2 = sizeof_DCI1A_20MHz_TDD_1_6_t;
                break;
              default:
                size_bytes1 = sizeof(DCI1A_1_5MHz_TDD_1_6_t);
                size_bytes2 = sizeof(DCI1A_1_5MHz_TDD_1_6_t);
                size_bits1 = sizeof_DCI1A_1_5MHz_TDD_1_6_t;
                size_bits2 = sizeof_DCI1A_1_5MHz_TDD_1_6_t;
                break;
              }

          }
          else {
              switch (mac_xface->lte_frame_parms->N_RB_DL) {
              case 6:
                size_bytes1 = sizeof(DCI1A_1_5MHz_FDD_t);
                size_bytes2 = sizeof(DCI1A_1_5MHz_FDD_t);
                size_bits1 = sizeof_DCI1A_1_5MHz_FDD_t;
                size_bits2 = sizeof_DCI1A_1_5MHz_FDD_t;
                break;
              case 25:
                size_bytes1 = sizeof(DCI1A_5MHz_FDD_t);
                size_bytes2 = sizeof(DCI1A_5MHz_FDD_t);
                size_bits1 = sizeof_DCI1A_5MHz_FDD_t;
                size_bits2 = sizeof_DCI1A_5MHz_FDD_t;
                break;
              case 50:
                size_bytes1 = sizeof(DCI1A_10MHz_FDD_t);
                size_bytes2 = sizeof(DCI1A_10MHz_FDD_t);
                size_bits1 = sizeof_DCI1A_10MHz_FDD_t;
                size_bits2 = sizeof_DCI1A_10MHz_FDD_t;
                break;
              case 100:
                size_bytes1 = sizeof(DCI1A_20MHz_FDD_t);
                size_bytes2 = sizeof(DCI1A_20MHz_FDD_t);
                size_bits1 = sizeof_DCI1A_20MHz_FDD_t;
                size_bits2 = sizeof_DCI1A_20MHz_FDD_t;
                break;
              default:
                size_bytes1 = sizeof(DCI1A_1_5MHz_FDD_t);
                size_bytes2 = sizeof(DCI1A_1_5MHz_FDD_t);
                size_bits1 = sizeof_DCI1A_1_5MHz_FDD_t;
                size_bits2 = sizeof_DCI1A_1_5MHz_FDD_t;
                break;
              }
          }
          memcpy((void *)&RA_template[j].RA_alloc_pdu1[0],(void *)&RA_alloc_pdu,size_bytes1);
          memcpy((void *)&RA_template[j].RA_alloc_pdu2[0],(void *)&DLSCH_alloc_pdu1A,size_bytes2);
          RA_template[j].RA_dci_size_bytes1 = size_bytes1;
          RA_template[j].RA_dci_size_bytes2 = size_bytes2;
          RA_template[j].RA_dci_size_bits1  = size_bits1;
          RA_template[j].RA_dci_size_bits2  = size_bits2;

          RA_template[j].RA_dci_fmt1        = format1A;
          RA_template[j].RA_dci_fmt2        = format1A;
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      }
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      memset (&eNB_mac_inst[i].eNB_stats,0,sizeof(eNB_STATS));
      UE_template = (UE_TEMPLATE *)&eNB_mac_inst[i].UE_template[0];
      for (j=0;j<NUMBER_OF_UE_MAX;j++) {
          UE_template[j].rnti=0;
          // initiallize the eNB to UE statistics
          memset (&eNB_mac_inst[i].eNB_UE_stats[j],0,sizeof(eNB_UE_STATS));
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      }
  }


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  //ICIC init param
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#ifdef ICIC
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  uint8_t SB_size;
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  SB_size=mac_xface->get_SB_size(mac_xface->lte_frame_parms->N_RB_DL);

  srand (time(NULL));

  for(j=0;j<NB_eNB_INST;j++){
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      eNB_mac_inst[j].sbmap_conf.first_subframe=0;
      eNB_mac_inst[j].sbmap_conf.periodicity=10;
      eNB_mac_inst[j].sbmap_conf.sb_size=SB_size;
      eNB_mac_inst[j].sbmap_conf.nb_active_sb=1;
      for(i=0;i<NUMBER_OF_SUBBANDS;i++)
        eNB_mac_inst[j].sbmap_conf.sbmap[i]=1;
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      eNB_mac_inst[j].sbmap_conf.sbmap[rand()%NUMBER_OF_SUBBANDS]=0;
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  }
#endif
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  //end ALU's algo
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  LOG_I(MAC,"[MAIN][INIT] Init function finished\n");
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  return(0);

}


int mac_init_global_param(void){

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  Mac_rlc_xface = NULL;
  LOG_I(MAC,"[MAIN] CALLING RLC_MODULE_INIT...\n");

  if (rlc_module_init()!=0)
    return(-1);

  LOG_I(MAC,"[MAIN] RLC_MODULE_INIT OK, malloc16 for mac_rlc_xface...\n");

  Mac_rlc_xface = (MAC_RLC_XFACE*)malloc16(sizeof(MAC_RLC_XFACE));
  bzero(Mac_rlc_xface,sizeof(MAC_RLC_XFACE));

  if(Mac_rlc_xface == NULL){
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      LOG_E(MAC,"[MAIN] FATAL EROOR: Could not allocate memory for Mac_rlc_xface !!!\n");
      return (-1);
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  }

  LOG_I(MAC,"[MAIN] malloc16 OK, mac_rlc_xface @ %p\n",(void *)Mac_rlc_xface);

  //  mac_xface->macphy_data_ind=macphy_data_ind;
  mac_xface->mrbch_phy_sync_failure=mrbch_phy_sync_failure;
  mac_xface->dl_phy_sync_success=dl_phy_sync_success;
  mac_xface->out_of_sync_ind=mac_out_of_sync_ind;

  //  Mac_rlc_xface->macphy_exit=  mac_xface->macphy_exit;
  //  Mac_rlc_xface->frame = 0;
  //  Mac_rlc_xface->mac_config_req=mac_config_req;
  //  Mac_rlc_xface->mac_meas_req=mac_meas_req;
  //  Mac_rlc_xface->rrc_rlc_config_req=rrc_rlc_config_req;
  //  Mac_rlc_xface->rrc_rlc_data_req=rrc_rlc_data_req;
  //  Mac_rlc_xface->rrc_rlc_register_rrc=rrc_rlc_register_rrc;

  //  Mac_rlc_xface->rrc_mac_config_req=rrc_mac_config_req;

  //  LOG_I(MAC,"[MAIN] INIT_GLOBAL_PARAM: Mac_rlc_xface=%p,rrc_rlc_register_rrc =%p\n",Mac_rlc_xface,Mac_rlc_xface->rrc_rlc_register_rrc);

  //  Mac_rlc_xface->mac_rlc_data_req=mac_rlc_data_req;
  //  Mac_rlc_xface->mac_rlc_data_ind=mac_rlc_data_ind;
  //  Mac_rlc_xface->mac_rlc_status_ind=mac_rlc_status_ind;
  //  Mac_rlc_xface->pdcp_data_req=pdcp_data_req;
  //  Mac_rlc_xface->mrbch_phy_sync_failure=mrbch_phy_sync_failure;
  //  Mac_rlc_xface->dl_phy_sync_success=dl_phy_sync_success;

  LOG_I(MAC,"[MAIN] RLC interface setup and init\n");
  rrc_init_global_param();
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#ifdef USER_MODE
  pdcp_layer_init ();
#else
  pdcp_module_init ();
#endif

  LOG_I(MAC,"[MAIN] Init Global Param Done\n");

  return 0;
}


void mac_top_cleanup(void){
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#ifndef USER_MODE
  pdcp_module_cleanup ();
#endif
  if (NB_UE_INST>0)
    free (UE_mac_inst);
  if (NB_eNB_INST>0)
    free(eNB_mac_inst);
  free( Mac_rlc_xface);
}

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int l2_init(LTE_DL_FRAME_PARMS *frame_parms,int eMBMS_active, uint8_t cba_group_active, uint8_t HO_active) {
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  LOG_I(MAC,"[MAIN] MAC_INIT_GLOBAL_PARAM IN...\n");
  //    NB_NODE=2;
  //    NB_INST=2;

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  Is_rrc_registered=0;
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  mac_init_global_param();
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  Is_rrc_registered=1;
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  mac_xface->macphy_init = mac_top_init;
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#ifndef USER_MODE
  mac_xface->macphy_exit = openair_sched_exit;
#else
  mac_xface->macphy_exit=(void (*)(const char*)) exit;
#endif
  LOG_I(MAC,"[MAIN] init eNB MAC functions  \n");
  mac_xface->eNB_dlsch_ulsch_scheduler = eNB_dlsch_ulsch_scheduler;
  mac_xface->get_dci_sdu               = get_dci_sdu;
  mac_xface->fill_rar                  = fill_rar;
  mac_xface->terminate_ra_proc         = terminate_ra_proc;
  mac_xface->initiate_ra_proc          = initiate_ra_proc;
  mac_xface->cancel_ra_proc            = cancel_ra_proc;
  mac_xface->SR_indication             = SR_indication;
  mac_xface->rx_sdu                    = rx_sdu;
  mac_xface->get_dlsch_sdu             = get_dlsch_sdu;
  mac_xface->get_eNB_UE_stats          = get_eNB_UE_stats;
  mac_xface->get_transmission_mode     = get_transmission_mode;
  mac_xface->get_rballoc               = get_rballoc;
  mac_xface->get_nb_rb                 = conv_nprb;
  mac_xface->get_SB_size               = Get_SB_size;
  mac_xface->get_subframe_direction    = get_subframe_direction;
  mac_xface->Msg3_transmitted          = Msg3_tx;
  mac_xface->Msg1_transmitted          = Msg1_tx;
  mac_xface->ra_failed                 = ra_failed;
  mac_xface->ra_succeeded              = ra_succeeded;

  LOG_I(MAC,"[MAIN] init UE MAC functions \n");
  mac_xface->ue_decode_si              = ue_decode_si;
  mac_xface->ue_send_sdu               = ue_send_sdu;
#ifdef Rel10
  mac_xface->ue_send_mch_sdu           = ue_send_mch_sdu;
  mac_xface->ue_query_mch              = ue_query_mch;
#endif
  mac_xface->ue_get_SR                 = ue_get_SR;
  mac_xface->ue_get_sdu                = ue_get_sdu;
  mac_xface->ue_get_rach               = ue_get_rach;
  mac_xface->ue_process_rar            = ue_process_rar;
  mac_xface->ue_scheduler              = ue_scheduler;
  mac_xface->process_timing_advance    = process_timing_advance;


  LOG_I(MAC,"[MAIN] PHY Frame configuration \n");
  mac_xface->lte_frame_parms = frame_parms;

  mac_xface->get_ue_active_harq_pid = get_ue_active_harq_pid;
  mac_xface->get_PL                 = get_PL;
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  mac_xface->get_RSRP               = get_RSRP;
  mac_xface->get_RSRQ               = get_RSRQ;
  mac_xface->get_RSSI               = get_RSSI;
  mac_xface->get_n_adj_cells        = get_n_adj_cells;
  mac_xface->get_rx_total_gain_dB   = get_rx_total_gain_dB;
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  mac_xface->get_Po_NOMINAL_PUSCH   = get_Po_NOMINAL_PUSCH;
  mac_xface->get_num_prach_tdd      = get_num_prach_tdd;
  mac_xface->get_fid_prach_tdd      = get_fid_prach_tdd;
  mac_xface->get_deltaP_rampup      = get_deltaP_rampup;
  mac_xface->computeRIV             = computeRIV;
  mac_xface->get_TBS_DL             = get_TBS_DL;
  mac_xface->get_TBS_UL             = get_TBS_UL;
  mac_xface->get_nCCE_max           = get_nCCE_max;
  mac_xface->get_ue_mode            = get_ue_mode;
  mac_xface->phy_config_sib1_eNB    = phy_config_sib1_eNB;
  mac_xface->phy_config_sib1_ue     = phy_config_sib1_ue;

  mac_xface->phy_config_sib2_eNB        = phy_config_sib2_eNB;
  mac_xface->phy_config_sib2_ue         = phy_config_sib2_ue;
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  mac_xface->phy_config_afterHO_ue      = phy_config_afterHO_ue;
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#ifdef Rel10
  mac_xface->phy_config_sib13_eNB        = phy_config_sib13_eNB;
  mac_xface->phy_config_sib13_ue         = phy_config_sib13_ue;
#endif
#ifdef CBA
  mac_xface->phy_config_cba_rnti         = phy_config_cba_rnti ;
#endif 
  mac_xface->phy_config_meas_ue          = phy_config_meas_ue;
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  mac_xface->phy_reset_ue		 = phy_reset_ue;
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  mac_xface->phy_config_dedicated_eNB    = phy_config_dedicated_eNB;
  mac_xface->phy_config_dedicated_ue     = phy_config_dedicated_ue;

#ifdef Rel10
  mac_xface->get_mch_sdu                 = get_mch_sdu;
#endif

  mac_xface->get_PHR = get_PHR;
  LOG_D(MAC,"[MAIN] ALL INIT OK\n");

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  mac_xface->macphy_init(eMBMS_active,cba_group_active,HO_active);
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  //Mac_rlc_xface->Is_cluster_head[0] = 1;
  //Mac_rlc_xface->Is_cluster_head[1] = 0;

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  return(1);
}