view src/g23m-gprs/grlc/grlc_gffs.c @ 268:f2e52cab0a73

abb_inth.c: check all interrupt causes, not just one The original code used if - else if - else if etc constructs, thus the first detected interrupt was the only one handled. However, Iota ITSTATREG is a clear-on-read register, thus if we only handle the first detected interrupt and skip checking the others, then the other interrupts will be lost, if more than one interrupt happened to occur in one ABB interrupt handling cycle - a form of rare race condition. Change the code to check all interrupts that were read in this cycle.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 13 Jun 2021 18:17:53 +0000
parents fa8dc04885d8
children
line wrap: on
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/* 
+----------------------------------------------------------------------------- 
|  Project :  GPRS (8441)
|  Modul   :  GRLC
+----------------------------------------------------------------------------- 
|  Copyright 2002 Texas Instruments Berlin, AG 
|                 All rights reserved. 
| 
|                 This file is confidential and a trade secret of Texas 
|                 Instruments Berlin, AG 
|                 The receipt of or possession of this file does not convey 
|                 any rights to reproduce or disclose its contents or to 
|                 manufacture, use, or sell anything it may describe, in 
|                 whole, or in part, without the specific written consent of 
|                 Texas Instruments Berlin, AG. 
+----------------------------------------------------------------------------- 
|  Purpose :  This module implements signal handler functions for service
|             GFF of entity GRLC.
+----------------------------------------------------------------------------- 
*/ 

#ifndef GRLC_GFFS_C
#define GRLC_GFFS_C
#endif

#define ENTITY_GRLC

/*==== INCLUDES =============================================================*/

#include "typedefs.h"    /* to get Condat data types */
#include "vsi.h"        /* to get a lot of macros */
#include "macdef.h"
#include "gprs.h"
#include "gsm.h"        /* to get a lot of macros */
#include "ccdapi.h"     /* to get CCD API */
#include "prim.h"       /* to get the definitions of used SAP and directions */
#include "message.h"
#include "grlc.h"        /* to get the global entity definitions */
#include "grlc_gfff.h"

/*==== CONST ================================================================*/

/*==== LOCAL VARS ===========================================================*/

/*==== PRIVATE FUNCTIONS ====================================================*/

/*==== PUBLIC FUNCTIONS =====================================================*/


#if defined REL99 AND defined TI_PS_FF_TBF_EST_PACCH
/*
+------------------------------------------------------------------------------
| Function    : sig_tm_gff_ul_activate
+------------------------------------------------------------------------------
| Description : Handles the internal signal SIG_TM_GFF_UL_ACTIVATE
|
| Parameters  : activate_cause - added for 2 Phase Access support
|
+------------------------------------------------------------------------------
*/
GLOBAL void sig_tm_gff_ul_activate ( UBYTE activate_cause) 
{ 
  TRACE_ISIG( "sig_tm_gff_ul_activate" );
  
  switch( GET_STATE( GFF ) )
  {
    case GFF_TWO_PHASE:
      if (activate_cause EQ GFF_ACTIVE)
      {
        SET_STATE(GFF,GFF_ACTIVE);
      }
      break; 
    case GFF_ACTIVE:
      if ( (activate_cause EQ GFF_ACTIVE )  AND
           (grlc_data->gff.rlc_status EQ RLC_STATUS_DL ))
      {
        grlc_data->gff.rlc_status = RLC_STATUS_BOTH;
      }
      break;
    case GFF_DEACTIVE:
      if (activate_cause EQ GFF_TWO_PHASE)
      {
        SET_STATE(GFF,GFF_TWO_PHASE);
      }
      else
      if(activate_cause EQ GFF_ACTIVE )
      {
        SET_STATE(GFF,GFF_ACTIVE);
      }
      gff_tbf_init();
      grlc_data->gff.rlc_status = RLC_STATUS_UL;
      break;
    default:
      TRACE_ERROR( "SIG_TM_GFF_UL_ACTIVATE unexpected" );
      break;
  }
} /* sig_tm_gff_ul_activate() */
#else

/*
+------------------------------------------------------------------------------
| Function    : sig_tm_gff_ul_activate
+------------------------------------------------------------------------------
| Description : Handles the internal signal SIG_TM_GFF_UL_ACTIVATE
|
| Parameters  : dummy - description of parameter dummy
|
+------------------------------------------------------------------------------
*/
GLOBAL void sig_tm_gff_ul_activate ( void) 
{ 
  TRACE_ISIG( "sig_tm_gff_ul_activate" );
  
  switch( GET_STATE( GFF ) )
  {
    case GFF_ACTIVE:
    case GFF_DEACTIVE:
      if(grlc_data->gff.rlc_status EQ RLC_STATUS_DL )
      {
        grlc_data->gff.rlc_status = RLC_STATUS_BOTH;
      }
      else if(grlc_data->gff.rlc_status EQ RLC_STATUS_NULL )
      {
        SET_STATE(GFF,GFF_ACTIVE);
        gff_tbf_init();
        grlc_data->gff.rlc_status = RLC_STATUS_UL;
      }
      break;
    default:
      TRACE_ERROR( "SIG_TM_GFF_UL_ACTIVATE unexpected" );
      break;
  }
} /* sig_tm_gff_ul_activate() */
#endif



/*
+------------------------------------------------------------------------------
| Function    : sig_tm_gff_ul_deactivate
+------------------------------------------------------------------------------
| Description : Handles the internal signal SIG_TM_GFF_UL_DEACTIVATE
|
| Parameters  : dummy - description of parameter dummy
|
+------------------------------------------------------------------------------
*/
GLOBAL void sig_tm_gff_ul_deactivate ( void) 
{ 
  TRACE_ISIG( "sig_tm_gff_ul_deactivate" );

  grlc_data->ul_tfi         = 0xFF;  
  
  switch( GET_STATE( GFF ) )
  {
#if defined REL99 AND defined TI_PS_FF_TBF_EST_PACCH
    case GFF_TWO_PHASE:
#endif
    case GFF_ACTIVE:
      if(grlc_data->gff.rlc_status EQ RLC_STATUS_BOTH )
        grlc_data->gff.rlc_status = RLC_STATUS_DL;
      else
      {
        grlc_data->gff.rlc_status = RLC_STATUS_NULL;
        SET_STATE(GFF,GFF_DEACTIVE);    
      }
      break;
    default:
      TRACE_ERROR( "SIG_TM_GFF_UL_DEACTIVATE unexpected" );
      break;
  }
} /* sig_tm_gff_ul_deactivate() */



/*
+------------------------------------------------------------------------------
| Function    : sig_tm_gff_dl_activate
+------------------------------------------------------------------------------
| Description : Handles the internal signal SIG_TM_GFF_DL_ACTIVATE
|
| Parameters  : dummy - description of parameter dummy
|
+------------------------------------------------------------------------------
*/
GLOBAL void sig_tm_gff_dl_activate ( void) 
{ 
  TRACE_ISIG( "sig_tm_gff_dl_activate" );
  
  switch( GET_STATE( GFF ) )
  {
    case GFF_ACTIVE:
    case GFF_DEACTIVE:
      if(grlc_data->gff.rlc_status EQ RLC_STATUS_UL )
        grlc_data->gff.rlc_status = RLC_STATUS_BOTH;
      else if(grlc_data->gff.rlc_status EQ RLC_STATUS_NULL )
      {
        SET_STATE(GFF,GFF_ACTIVE);
        gff_tbf_init();
        grlc_data->gff.rlc_status = RLC_STATUS_DL;
      }
      break;
    default:
      TRACE_ERROR( "SIG_TM_GFF_DL_ACTIVATE unexpected" );
      break;
  }
} /* sig_tm_gff_dl_activate() */



/*
+------------------------------------------------------------------------------
| Function    : sig_tm_gff_dl_deactivate
+------------------------------------------------------------------------------
| Description : Handles the internal signal SIG_TM_GFF_DL_DEACTIVATE
|
| Parameters  : dummy - description of parameter dummy
|
+------------------------------------------------------------------------------
*/
GLOBAL void sig_tm_gff_dl_deactivate ( void) 
{ 
  TRACE_ISIG( "sig_tm_gff_dl_deactivate" );

  grlc_data->dl_tfi         = 0xFF;

  switch( GET_STATE( GFF ) )
  {
    case GFF_ACTIVE:
      if(grlc_data->gff.rlc_status EQ RLC_STATUS_BOTH )
        grlc_data->gff.rlc_status = RLC_STATUS_UL;
      else
      {
        grlc_data->gff.rlc_status = RLC_STATUS_NULL;
        SET_STATE(GFF,GFF_DEACTIVE);    
      }
      break;
    default:
      TRACE_ERROR( "SIG_TM_GFF_DL_DEACTIVATE unexpected" );
      break;
  }
} /* sig_tm_gff_dl_deactivate() */