360 lines
24 KiB
C
360 lines
24 KiB
C
#ifndef LTE_SOFTMODEM_H
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#define LTE_SOFTMODEM_H
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#define _GNU_SOURCE
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#include <execinfo.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <linux/sched.h>
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#include "rt_wrapper.h"
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#include <sched.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syscall.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/sysinfo.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/sysinfo.h>
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#include "rt_wrapper.h"
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#include "../../ARCH/COMMON/common_lib.h"
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//#undef MALLOC
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#include "assertions.h"
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#include "msc.h"
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#include "PHY/types.h"
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#include "PHY/defs_eNB.h"
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#include "PHY/defs_UE.h"
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#include "SIMULATION/ETH_TRANSPORT/proto.h"
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#include "flexran_agent.h"
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#if defined(ENABLE_ITTI)
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#if defined(ENABLE_USE_MME)
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#include "s1ap_eNB.h"
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#ifdef PDCP_USE_NETLINK
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#include "SIMULATION/ETH_TRANSPORT/proto.h"
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#endif
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#endif
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#endif
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/* help strings definition for command line options, used in CMDLINE_XXX_DESC macros and printed when -h option is used */
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#define CONFIG_HLP_RFCFGF "Configuration file for front-end (e.g. LMS7002M)\n"
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#define CONFIG_HLP_ULMAXE "set the eNodeB max ULSCH erros\n"
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#define CONFIG_HLP_CALUER "set UE RX calibration\n"
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#define CONFIG_HLP_CALUERM ""
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#define CONFIG_HLP_CALUERB ""
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#define CONFIG_HLP_DBGUEPR "UE run normal prach power ramping, but don't continue random-access\n"
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#define CONFIG_HLP_CALPRACH "UE run normal prach with maximum power, but don't continue random-access\n"
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#define CONFIG_HLP_NOL2CN "bypass L2 and upper layers\n"
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#define CONFIG_HLP_SIML1 "activate RF simulator instead of HW\n"
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#define CONFIG_HLP_NUMUE "number of UE instances\n"
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#define CONFIG_HLP_UERXG "set UE RX gain\n"
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#define CONFIG_HLP_UERXGOFF "external UE amplifier offset\n"
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#define CONFIG_HLP_UETXG "set UE TX gain\n"
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#define CONFIG_HLP_UENANTR "set UE number of rx antennas\n"
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#define CONFIG_HLP_UENANTT "set UE number of tx antennas\n"
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#define CONFIG_HLP_UESCAN "set UE to scan around carrier\n"
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#define CONFIG_HLP_DUMPFRAME "dump UE received frame to rxsig_frame0.dat and exit\n"
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#define CONFIG_HLP_DLSHIFT "dynamic shift for LLR compuation for TM3/4 (default 0)\n"
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#define CONFIG_HLP_UELOOP "get softmodem (UE) to loop through memory instead of acquiring from HW\n"
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#define CONFIG_HLP_PHYTST "test UE phy layer, mac disabled\n"
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#define CONFIG_HLP_DMAMAP "sets flag for improved EXMIMO UE performance\n"
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#define CONFIG_HLP_CLK "tells hardware to use a clock reference (0:internal, 1:external, 2:gpsdo)\n"
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#define CONFIG_HLP_USIM "use XOR autentication algo in case of test usim mode\n"
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#define CONFIG_HLP_NOSNGLT "Disables single-thread mode in lte-softmodem\n"
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#define CONFIG_HLP_TADV "Set timing_advance\n"
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#define CONFIG_HLP_DLF "Set the downlink frequency for all component carriers\n"
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#define CONFIG_HLP_CHOFF "Channel id offset\n"
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#define CONFIG_HLP_SOFTS "Enable soft scope and L1 and L2 stats (Xforms)\n"
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#define CONFIG_HLP_EXMCAL "Calibrate the EXMIMO borad, available files: exmimo2_2arxg.lime exmimo2_2brxg.lime \n"
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#define CONFIG_HLP_ITTIL "Generate ITTI analyzser logs (similar to wireshark logs but with more details)\n"
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#define CONFIG_HLP_DLMCS "Set the maximum downlink MCS\n"
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#define CONFIG_HLP_STMON "Enable processing timing measurement of lte softmodem on per subframe basis \n"
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#define CONFIG_HLP_PRB "Set the PRB, valid values: 6, 25, 50, 100 \n"
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#define CONFIG_HLP_EMULIFACE "Set the interface name for the multicast transport for emulation mode (e.g. eth0, lo, etc.) \n"
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//#define CONFIG_HLP_NUMUES "Set the number of UEs for the emulation"
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#define CONFIG_HLP_MSLOTS "Skip the missed slots/subframes \n"
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#define CONFIG_HLP_ULMCS "Set the maximum uplink MCS\n"
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#define CONFIG_HLP_TDD "Set hardware to TDD mode (default: FDD). Used only with -U (otherwise set in config file).\n"
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#define CONFIG_HLP_SNR "Set average SNR in dB (for --siml1 option)\n"
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#define CONFIG_HLP_UE "Set the lte softmodem as a UE\n"
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#define CONFIG_HLP_TQFS "Apply three-quarter of sampling frequency, 23.04 Msps to reduce the data rate on USB/PCIe transfers (only valid for 20 MHz)\n"
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#define CONFIG_HLP_TPORT "tracer port\n"
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#define CONFIG_HLP_NOTWAIT "don't wait for tracer, start immediately\n"
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#define CONFIG_HLP_TNOFORK "to ease debugging with gdb\n"
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#define CONFIG_HLP_NUMEROLOGY "adding numerology for 5G\n"
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#define CONFIG_HLP_EMULATE_RF "Emulated RF enabled(disable by defult)\n"
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#define CONFIG_HLP_PARALLEL_CMD "three config for level of parallelism 'PARALLEL_SINGLE_THREAD', 'PARALLEL_RU_L1_SPLIT', or 'PARALLEL_RU_L1_TRX_SPLIT'\n"
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#define CONFIG_HLP_WORKER_CMD "two option for worker 'WORKER_DISABLE' or 'WORKER_ENABLE'\n"
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#define CONFIG_HLP_NOS1 "Disable s1 interface\n"
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#define CONFIG_HLP_NOKRNMOD "(noS1 only): Use tun instead of namesh module \n"
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#define CONFIG_HLP_DISABLNBIOT "disable nb-iot, even if defined in config\n"
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#define CONFIG_HLP_USRP_ARGS "set the arguments to identify USRP (same syntax as in UHD)\n"
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#define CONFIG_HLP_USRP_CLK_SRC "USRP clock source: 'internal' or 'external'\n"
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/***************************************************************************************************************************************/
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/* command line options definitions, CMDLINE_XXXX_DESC macros are used to initialize paramdef_t arrays which are then used as argument
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when calling config_get or config_getlist functions */
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/*------------------------------------------------------------------------------------------------------------------------------------------*/
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/* command line parameters defining UE running mode */
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/* optname helpstr paramflags XXXptr defXXXval type numelt */
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/*------------------------------------------------------------------------------------------------------------------------------------------*/
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#define CMDLINE_UEMODEPARAMS_DESC { \
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{"calib-ue-rx", CONFIG_HLP_CALUER, 0, iptr:&rx_input_level_dBm, defintval:0, TYPE_INT, 0}, \
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{"calib-ue-rx-med", CONFIG_HLP_CALUERM, 0, iptr:&rx_input_level_dBm, defintval:0, TYPE_INT, 0}, \
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{"calib-ue-rx-byp", CONFIG_HLP_CALUERB, 0, iptr:&rx_input_level_dBm, defintval:0, TYPE_INT, 0}, \
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{"debug-ue-prach", CONFIG_HLP_DBGUEPR, PARAMFLAG_BOOL, uptr:NULL, defuintval:1, TYPE_INT, 0}, \
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{"no-L2-connect", CONFIG_HLP_NOL2CN, PARAMFLAG_BOOL, uptr:NULL, defuintval:1, TYPE_INT, 0}, \
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{"calib-prach-tx", CONFIG_HLP_CALPRACH, PARAMFLAG_BOOL, uptr:NULL, defuintval:1, TYPE_INT, 0}, \
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{"loop-memory", CONFIG_HLP_UELOOP, 0, strptr:&loopfile, defstrval:"iqs.in", TYPE_STRING,0}, \
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{"ue-dump-frame", CONFIG_HLP_DUMPFRAME, PARAMFLAG_BOOL, iptr:&dumpframe, defintval:0, TYPE_INT, 0}, \
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}
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#define CMDLINE_CALIBUERX_IDX 0
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#define CMDLINE_CALIBUERXMED_IDX 1
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#define CMDLINE_CALIBUERXBYP_IDX 2
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#define CMDLINE_DEBUGUEPRACH_IDX 3
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#define CMDLINE_NOL2CONNECT_IDX 4
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#define CMDLINE_CALIBPRACHTX_IDX 5
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#define CMDLINE_MEMLOOP_IDX 6
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#define CMDLINE_DUMPMEMORY_IDX 7
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/*------------------------------------------------------------------------------------------------------------------------------------------*/
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#define START_MSC softmodem_params.start_msc
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/*-------------------------------------------------------------------------------------------------------------------------------------------------------*/
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/* command line parameters specific to UE */
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/* optname helpstr paramflags XXXptr defXXXval type numelt */
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/*-------------------------------------------------------------------------------------------------------------------------------------------------------*/
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#define CMDLINE_UEPARAMS_DESC { \
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{"siml1", CONFIG_HLP_SIML1, PARAMFLAG_BOOL, iptr:&simL1flag, defintval:0, TYPE_INT, 0}, \
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{"U", CONFIG_HLP_NUMUE, 0, u8ptr:&NB_UE_INST, defuintval:1, TYPE_UINT, 0}, \
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{"ue-rxgain", CONFIG_HLP_UERXG, 0, dblptr:&(rx_gain[0][0]), defdblval:130, TYPE_DOUBLE, 0}, \
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{"ue-rxgain-off", CONFIG_HLP_UERXGOFF, 0, dblptr:&rx_gain_off, defdblval:0, TYPE_DOUBLE, 0}, \
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{"ue-txgain", CONFIG_HLP_UETXG, 0, dblptr:&(tx_gain[0][0]), defdblval:0, TYPE_DOUBLE, 0}, \
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{"ue-nb-ant-rx", CONFIG_HLP_UENANTR, 0, u8ptr:&nb_antenna_rx, defuintval:1, TYPE_UINT8, 0}, \
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{"ue-nb-ant-tx", CONFIG_HLP_UENANTT, 0, u8ptr:&nb_antenna_tx, defuintval:1, TYPE_UINT8, 0}, \
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{"ue-scan-carrier", CONFIG_HLP_UESCAN, PARAMFLAG_BOOL, iptr:&UE_scan_carrier, defintval:0, TYPE_INT, 0}, \
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{"ue-max-power", NULL, 0, iptr:&(tx_max_power[0]), defintval:23, TYPE_INT, 0}, \
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{"emul-iface", CONFIG_HLP_EMULIFACE, 0, strptr:&emul_iface, defstrval:"lo", TYPE_STRING, 100}, \
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{"L2-emul", NULL, 0, u8ptr:&nfapi_mode, defuintval:3, TYPE_UINT8, 0}, \
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{"num-ues", NULL, 0, u8ptr:&(NB_UE_INST), defuintval:1, TYPE_UINT8, 0}, \
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{"nums_ue_thread", NULL, 0, u16ptr:&(NB_THREAD_INST), defuintval:1, TYPE_UINT16, 0}, \
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{"r" , CONFIG_HLP_PRB, 0, u8ptr:&(frame_parms[0]->N_RB_DL), defintval:25, TYPE_UINT8, 0}, \
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{"dlsch-demod-shift", CONFIG_HLP_DLSHIFT, 0, iptr:(int32_t *)&dlsch_demod_shift, defintval:0, TYPE_INT, 0}, \
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{"usrp-args", CONFIG_HLP_USRP_ARGS, 0, strptr:(char **)&usrp_args, defstrval:"type=b200",TYPE_STRING, 0}, \
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{"usrp-clksrc", CONFIG_HLP_USRP_CLK_SRC,0, strptr:(char **)&usrp_clksrc, defstrval:"internal", TYPE_STRING, 0}, \
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{"mmapped-dma", CONFIG_HLP_DMAMAP, PARAMFLAG_BOOL, uptr:&mmapped_dma, defintval:0, TYPE_INT, 0}, \
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{"clock", CONFIG_HLP_CLK, 0, uptr:&clock_source, defintval:0, TYPE_UINT, 0}, \
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{"s" , CONFIG_HLP_SNR, 0, iptr:&snr_dB, defintval:25, TYPE_INT, 0}, \
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{"T" , CONFIG_HLP_TDD, PARAMFLAG_BOOL, iptr:&tddflag, defintval:0, TYPE_INT, 0}, \
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{"A", CONFIG_HLP_TADV, 0, iptr:&(timingadv), defintval:0, TYPE_INT, 0} \
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}
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/*-------------------------------------------------------------------------------------------------------------------------------------------------------*/
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/* command line parameters specific to UE threads */
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/* optname helpstr paramflags XXXptr defXXXval type numelt */
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/*-------------------------------------------------------------------------------------------------------------------------------------------------------*/
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#define CMDLINE_UETHREADSPARAMS_DESC { \
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{"threadIQ", NULL, 0, iptr:&(threads.iq), defintval:1, TYPE_INT, 0}, \
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{"threadOneSubframe", NULL, 0, iptr:&(threads.one), defintval:1, TYPE_INT, 0}, \
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{"threadTwoSubframe", NULL, 0, iptr:&(threads.two), defintval:1, TYPE_INT, 0}, \
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{"threadThreeSubframe", NULL, 0, iptr:&(threads.three), defintval:1, TYPE_INT, 0}, \
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{"threadSlot1ProcOne", NULL, 0, iptr:&(threads.slot1_proc_one), defintval:1, TYPE_INT, 0}, \
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{"threadSlot1ProcTwo", NULL, 0, iptr:&(threads.slot1_proc_two), defintval:1, TYPE_INT, 0}, \
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}
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#define DEFAULT_DLF 2680000000
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/*---------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
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/* command line parameters common to eNodeB and UE */
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/* optname helpstr paramflags XXXptr defXXXval type numelt */
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/*---------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
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#define RF_CONFIG_FILE softmodem_params.rf_config_file
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#define PHY_TEST softmodem_params.phy_test
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#define WAIT_FOR_SYNC softmodem_params.wait_for_sync
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#define SINGLE_THREAD_FLAG softmodem_params.single_thread_flag
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#define CHAIN_OFFSET softmodem_params.chain_offset
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#define DO_FORMS softmodem_params.do_forms
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#define NUMEROLOGY softmodem_params.numerology
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#define EMULATE_RF softmodem_params.emulate_rf
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#define CLOCK_SOURCE softmodem_params.clock_source
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#define USIM_TEST softmodem_params.usim_test
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#define CMDLINE_PARAMS_DESC { \
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{"rf-config-file", CONFIG_HLP_RFCFGF, 0, strptr:(char **)&RF_CONFIG_FILE, defstrval:NULL, TYPE_STRING, sizeof(RF_CONFIG_FILE)}, \
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{"ulsch-max-errors", CONFIG_HLP_ULMAXE, 0, uptr:&ULSCH_max_consecutive_errors, defuintval:0, TYPE_UINT, 0}, \
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{"phy-test", CONFIG_HLP_PHYTST, PARAMFLAG_BOOL, iptr:&PHY_TEST, defintval:0, TYPE_INT, 0}, \
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{"usim-test", CONFIG_HLP_USIM, PARAMFLAG_BOOL, u8ptr:&USIM_TEST, defintval:0, TYPE_UINT8, 0}, \
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{"emulate-rf" , CONFIG_HLP_EMULATE_RF, PARAMFLAG_BOOL, iptr:&EMULATE_RF, defintval:0, TYPE_INT, 0}, \
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{"clock", CONFIG_HLP_CLK, 0, uptr:&CLOCK_SOURCE, defintval:0, TYPE_UINT, 0}, \
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{"wait-for-sync", NULL, PARAMFLAG_BOOL, iptr:&WAIT_FOR_SYNC, defintval:0, TYPE_INT, 0}, \
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{"single-thread-enable", CONFIG_HLP_NOSNGLT, PARAMFLAG_BOOL, iptr:&SINGLE_THREAD_FLAG, defintval:0, TYPE_INT, 0}, \
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{"C" , CONFIG_HLP_DLF, 0, uptr:&(downlink_frequency[0][0]), defuintval:2680000000, TYPE_UINT, 0}, \
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{"a" , CONFIG_HLP_CHOFF, 0, iptr:&CHAIN_OFFSET, defintval:0, TYPE_INT, 0}, \
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{"d" , CONFIG_HLP_SOFTS, PARAMFLAG_BOOL, uptr:(uint32_t *)&DO_FORMS, defintval:0, TYPE_INT8, 0}, \
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{"W" , CONFIG_HLP_L2MONW, 0, strptr:(char **)&in_ip, defstrval:"127.0.0.1", TYPE_STRING, sizeof(in_ip)}, \
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{"P" , CONFIG_HLP_L2MONP, 0, strptr:(char **)&in_path, defstrval:"/tmp/oai_opt.pcap", TYPE_STRING, sizeof(in_path)}, \
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{"q" , CONFIG_HLP_STMON, PARAMFLAG_BOOL, iptr:&opp_enabled, defintval:0, TYPE_INT, 0}, \
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{"S" , CONFIG_HLP_MSLOTS, PARAMFLAG_BOOL, u8ptr:&exit_missed_slots, defintval:1, TYPE_UINT8, 0}, \
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{"numerology" , CONFIG_HLP_NUMEROLOGY, PARAMFLAG_BOOL, iptr:&NUMEROLOGY, defintval:0, TYPE_INT, 0}, \
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{"parallel-config", CONFIG_HLP_PARALLEL_CMD,0, strptr:(char **)¶llel_config, defstrval:NULL, TYPE_STRING, 0}, \
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{"worker-config", CONFIG_HLP_WORKER_CMD, 0, strptr:(char **)&worker_config, defstrval:NULL, TYPE_STRING, 0}, \
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{"noS1", CONFIG_HLP_NOS1, PARAMFLAG_BOOL, uptr:&noS1, defintval:0, TYPE_INT, 0}, \
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{"nokrnmod", CONFIG_HLP_NOKRNMOD, PARAMFLAG_BOOL, uptr:&nokrnmod, defintval:0, TYPE_INT, 0}, \
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{"nbiot-disable", CONFIG_HLP_DISABLNBIOT, PARAMFLAG_BOOL, uptr:&nonbiot, defuintval:0, TYPE_INT, 0}, \
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}
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#define CONFIG_HLP_FLOG "Enable online log \n"
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#define CONFIG_HLP_LOGL "Set the global log level, valide options: (4:trace, 3:debug, 2:info, 1:warn, (0:error))\n"
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#define CONFIG_HLP_TELN "Start embedded telnet server \n"
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#define CONFIG_HLP_MSC "Enable the MSC tracing utility \n"
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/*---------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
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/* command line parameters for LOG utility */
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/* optname helpstr paramflags XXXptr defXXXval type numelt */
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/*---------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
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#define START_MSC softmodem_params.start_msc
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#define CMDLINE_LOGPARAMS_DESC { \
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{"R" , CONFIG_HLP_FLOG, 0, uptr:&online_log_messages, defintval:1, TYPE_INT, 0}, \
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{"g" , CONFIG_HLP_LOGL, 0, uptr:&glog_level, defintval:0, TYPE_UINT, 0}, \
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{"telnetsrv", CONFIG_HLP_TELN, PARAMFLAG_BOOL, uptr:&start_telnetsrv, defintval:0, TYPE_UINT, 0}, \
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{"msc", CONFIG_HLP_MSC, PARAMFLAG_BOOL, uptr:&START_MSC, defintval:0, TYPE_UINT, 0}, \
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}
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#define CMDLINE_ONLINELOG_IDX 0
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#define CMDLINE_GLOGLEVEL_IDX 1
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#define CMDLINE_STARTTELN_IDX 2
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/* check function for global log level */
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#define CMDLINE_LOGPARAMS_CHECK_DESC { \
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{ .s5= {NULL }} , \
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{ .s2= { config_check_intrange, {0,4}}}, \
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{ .s5= {NULL }} , \
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{ .s5= {NULL }} , \
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}
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/***************************************************************************************************************************************/
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/* */
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#include "threads_t.h"
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#define SOFTMODEM_NOS1_BIT (1<<0)
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#define SOFTMODEM_NOKRNMOD_BIT (1<<1)
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#define SOFTMODEM_NONBIOT_BIT (1<<2)
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typedef struct {
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uint64_t optmask;
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THREAD_STRUCT thread_struct;
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char rf_config_file[1024];
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int phy_test;
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uint8_t usim_test;
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int emulate_rf;
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int wait_for_sync; //eNodeB only
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int single_thread_flag; //eNodeB only
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int chain_offset;
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uint32_t do_forms;
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int numerology;
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unsigned int start_msc;
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uint32_t clock_source;
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int hw_timing_advance;
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} softmodem_params_t;
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#define IS_SOFTMODEM_NOS1 ( get_softmodem_optmask() & SOFTMODEM_NOS1_BIT)
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#define IS_SOFTMODEM_NOKRNMOD ( get_softmodem_optmask() & SOFTMODEM_NOKRNMOD_BIT)
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#define IS_SOFTMODEM_NONBIOT ( get_softmodem_optmask() & SOFTMODEM_NONBIOT_BIT)
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extern uint64_t get_softmodem_optmask(void);
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extern uint64_t set_softmodem_optmask(uint64_t bitmask);
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extern void get_common_options(void);
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extern softmodem_params_t *get_softmodem_params(void);
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uint64_t get_pdcp_optmask(void);
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extern pthread_cond_t sync_cond;
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extern pthread_mutex_t sync_mutex;
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extern int sync_var;
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extern uint32_t downlink_frequency[MAX_NUM_CCs][4];
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extern int32_t uplink_frequency_offset[MAX_NUM_CCs][4];
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extern int rx_input_level_dBm;
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extern uint8_t exit_missed_slots;
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extern uint64_t num_missed_slots; // counter for the number of missed slots
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extern int oaisim_flag;
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extern volatile int oai_exit;
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extern openair0_config_t openair0_cfg[MAX_CARDS];
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extern pthread_cond_t sync_cond;
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extern pthread_mutex_t sync_mutex;
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extern int sync_var;
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extern int transmission_mode;
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extern double cpuf;
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#if defined(ENABLE_ITTI)
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extern volatile int start_eNB;
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extern volatile int start_UE;
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#endif
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// In lte-enb.c
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extern void init_eNB(int single_thread_flag,int wait_for_sync);
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extern void stop_eNB(int);
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extern void kill_eNB_proc(int inst);
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// In lte-ru.c
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extern void init_RU(char *);
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extern void stop_ru(RU_t *ru);
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extern void init_ru_vnf(void);
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extern void init_RU_proc(RU_t *ru);
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extern void stop_RU(int nb_ru);
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extern void kill_RU_proc(RU_t *ru);
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extern void set_function_spec_param(RU_t *ru);
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// In lte-ue.c
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extern int setup_ue_buffers(PHY_VARS_UE **phy_vars_ue, openair0_config_t *openair0_cfg);
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extern void fill_ue_band_info(void);
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extern void init_UE(int nb_inst,int eMBMS_active, int uecap_xer_in, int timing_correction, int phy_test, int UE_scan, int UE_scan_carrier, runmode_t mode,int rxgain,int txpowermax,
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LTE_DL_FRAME_PARMS *fp);
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extern void init_thread(int sched_runtime, int sched_deadline, int sched_fifo, cpu_set_t *cpuset, char *name);
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extern void reset_opp_meas(void);
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extern void print_opp_meas(void);
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extern void init_td_thread(PHY_VARS_eNB *);
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extern void init_te_thread(PHY_VARS_eNB *);
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extern void kill_td_thread(PHY_VARS_eNB *);
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extern void kill_te_thread(PHY_VARS_eNB *);
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extern void RCConfig_sim(void);
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extern void init_ocm(double,double);
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extern void init_ue_devices(PHY_VARS_UE *);
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PHY_VARS_UE *init_ue_vars(LTE_DL_FRAME_PARMS *frame_parms,
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uint8_t UE_id,
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uint8_t abstraction_flag);
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void init_eNB_afterRU(void);
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PARALLEL_CONF_t get_thread_parallel_conf(void);
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WORKER_CONF_t get_thread_worker_conf(void);
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void set_parallel_conf(char *parallel_conf);
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void set_worker_conf(char *worker_conf);
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extern int stop_L1L2(module_id_t enb_id);
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extern int restart_L1L2(module_id_t enb_id);
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extern void init_UE_stub_single_thread(int nb_inst,int eMBMS_active, int uecap_xer_in, char *emul_iface);
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extern PHY_VARS_UE *init_ue_vars(LTE_DL_FRAME_PARMS *frame_parms,
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uint8_t UE_id,
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uint8_t abstraction_flag);
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#endif
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