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view src/cs/layer1/cfile/l1_api_hisr.c @ 268:f2e52cab0a73

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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 4e78acac3d88
children
line wrap: on
line source

/************* Revision Controle System Header *************
 *                  GSM Layer 1 software
 * L1_API_HISR.C
 *
 *        Filename l1_api_hisr.c
 *  Copyright 2003 (C) Texas Instruments
 *
 ************* Revision Controle System Header *************/

#include "l1_confg.h"
#include "nucleus.h"
#include "sys_types.h"
#include "l1_types.h"
#include "l1audio_cust.h"
#include "l1audio_defty.h"
#include "l1audio_const.h"
#include "l1_const.h"
#include "cust_os.h"
#include "l1tm_defty.h"
#if (L1_GTT == 1)
  #include "l1gtt_const.h"
  #include "l1gtt_defty.h"
#endif
#if (L1_MP3 == 1)
  #include "l1mp3_const.h"
  #include "l1mp3_signa.h"
  #include "l1mp3_defty.h"
  #include "l1mp3_proto.h"
#endif
#if (L1_MIDI == 1)
  #include "l1midi_const.h"
  #include "l1midi_signa.h"
  #include "l1midi_defty.h"
  #include "l1midi_proto.h"
#endif
#if (L1_AAC == 1)
  #include "l1aac_const.h"
  #include "l1aac_signa.h"
  #include "l1aac_defty.h"
  #include "l1aac_proto.h"
#endif
#if (L1_DYN_DSP_DWNLD==1)
  #include "l1_dyn_dwl_defty.h"
  #include "l1_dyn_dwl_msgty.h"
  #include "l1_dyn_dwl_const.h"
  #include "l1_dyn_dwl_signa.h"
  #include "l1_dyn_dwl_error.h"
  #include "l1_dyn_dwl_proto.h" 
  #include "l1_api_hisr.h"
#endif
#include "l1_defty.h"
#include "l1_api_hisr.h"
#include "l1audio_signa.h"
#include "l1_varex.h"
#include "l1_macro.h"
#include "mem.h"


/*-------------------------------------------------------------*/
/* l1_api_handler()                                            */
/*-------------------------------------------------------------*/
/*                                                             */
/* Parameters : none                                           */
/*                                                             */
/* Return     : n/a                                            */
/*                                                             */
/* Description : API interrupt handler, multiplexed for:       */
/*               1) audio sources: MP3 or AAC                 */
/*               2) modem sources: USF                         */
/*                                                             */
// The API Interrupt is multiplexed between (DYN DWNLD, MP3 ,AAC) and FAST USF. 
// DYN DWNLD, MP3 and AAC are mutually exclusive and hence only one would be
// active at one time. But FAST USF would co-exist with any of the them and hence
// there needs to be a way to distinguish the two sources of the API Interrupt. A flag
// d_dsp_hint_flag is used by the DSP to signify the source of the interrupt. The bit 
// configuration of d_dsp_hint_flag is 
// 15 14 13 12 | 11 10 9 8 | 7 6 5 4 | 3 2 1 0 
//                                                                 | |____> Fast USF
//                                                                 |______> (DYN DWNLD, MP3, AAC)


void l1_api_handler()
{
#if (FF_L1_IT_DSP_USF == 1) || (FF_L1_IT_DSP_DTX == 1) || (FF_L1_FAST_DECODING == 1)
extern NU_HISR api_modemHISR;
#endif

#if ( (L1_MP3 == 1) || (L1_AAC == 1) || (L1_MIDI == 1) || (L1_DYN_DSP_DWNLD == 1) )
  extern NU_HISR apiHISR;
#endif

#if (FF_L1_IT_DSP_USF == 1) || (FF_L1_IT_DSP_DTX == 1) || (FF_L1_FAST_DECODING == 1)
#if (FF_L1_FAST_DECODING == 1)  
 if (l1s_dsp_com.dsp_ndb_ptr->d_dsp_hint_flag & (1 << B_FAST_DECODING_FLAG))
  {
    // Flag HISR to be scheduled
    l1a_apihisr_com.fast_decoding.pending = TRUE;
    // Clear API ISR condition
    l1s_dsp_com.dsp_ndb_ptr->d_dsp_hint_flag &= ~(1 << B_FAST_DECODING_FLAG);
    l1a_apihisr_com.fast_decoding.crc_error = 
            l1s_dsp_com.dsp_ndb_ptr->d_fast_paging_data & (C_FAST_DECODING_CRC_FIRE1);
    NU_Activate_HISR(&api_modemHISR);  // activate API modem HISR
  }
#endif /* FF_L1_FAST_DECODING */  
#if (FF_L1_IT_DSP_USF == 1) 
   if (l1s_dsp_com.dsp_ndb_ptr->d_dsp_hint_flag & (1 << B_USF_HINT_ISSUED))
  {
    // Flag HISR to be scheduled
    l1a_apihisr_com.usf.pending = TRUE;
    // Clear API ISR condition
    l1s_dsp_com.dsp_ndb_ptr->d_dsp_hint_flag &= ~(1 << B_USF_HINT_ISSUED);
    NU_Activate_HISR(&api_modemHISR);  // activate API modem HISR
  }
#endif //(FF_L1_IT_DSP_USF == 1) 
#if (FF_L1_IT_DSP_DTX == 1)
  
  if ((l1s_dsp_com.dsp_ndb_ptr->d_dsp_hint_flag & 0x4 ) != 0) // DTX interrupt set by 3rd bit position from left
  {
    // Flag HISR to be scheduled
     l1a_apihisr_com.dtx.pending = TRUE;
    // Clear API ISR condition
    
    l1s_dsp_com.dsp_ndb_ptr->d_dsp_hint_flag &= 0xFB; //reset the 3rd bit position
    NU_Activate_HISR(&api_modemHISR);  // activate API modem HISR
  }
#endif //(FF_L1_IT_DSP_DTX == 1) 
// Call the API HISR when MP3, AAC, DYN DWNLD comes
#if ( (L1_MP3 == 1) || (L1_MIDI == 1) || (L1_AAC == 1) || (L1_DYN_DSP_DWNLD == 1) )




   if (l1s_dsp_com.dsp_ndb_ptr->d_dsp_aud_hint_flag & (1 << B_NON_USF_HINT_ISSUED))
  {   
    // Clear API ISR condition
    l1s_dsp_com.dsp_ndb_ptr->d_dsp_aud_hint_flag = 0;
    //Activate the API HISR
  NU_Activate_HISR(&apiHISR);
  }
#endif // (L1_MP3 == 1) || (L1_MIDI == 1) || (L1_DYN_DSP_DWNLD == 1)
#endif //(FF_L1_IT_DSP_USF == 1) || //(FF_L1_IT_DSP_DTX == 1)

#if 0	/* FreeCalypso Frankenstein */
/* This is the original LoCosto code */

//When Fast USF is not enabled, then the API HISR needs to be called every time the DSP 
//sends a HINT interrupt.
#if (!FF_L1_IT_DSP_USF) && (!FF_L1_IT_DSP_DTX)
#if ( (L1_MP3 == 1) || (L1_MIDI == 1) || (L1_AAC == 1) || (L1_DYN_DSP_DWNLD == 1) )
NU_Activate_HISR(&apiHISR); 
#endif
#endif
//NU_Activate_HISR(&apiHISR); //hack remove
  return;

#else

/* reconstruction of what the TCS211 code was probably like */
#if (L1_DYN_DSP_DWNLD == 1)
  if( l1_apihisr.dyn_dwnld.running == TRUE )
  {
    NU_Activate_HISR(&apiHISR); 
  }
#endif

#endif
}

/*-------------------------------------------------------------*/
/* api_hisr()                                                  */
/*-------------------------------------------------------------*/
/*                                                             */
/* Parameters : none                                           */
/*                                                             */
/* Return     : n/a                                            */
/*                                                             */
/* Description : main function dealing with DSP->MCU interrupt */
/*                                                             */
/*-------------------------------------------------------------*/
void api_hisr(void)
{
#if (L1_MP3 == 1)
  if(l1a_apihisr_com.mp3.running==TRUE)
  {
    l1mp3_apihisr();
  }
#endif
#if (L1_MIDI == 1)
  if(l1_apihisr.midi.running==TRUE)
  {
    l1midi_apihisr();
  }
#endif
#if (L1_AAC == 1)
  if(l1a_apihisr_com.aac.running==TRUE)
  {
    l1aac_apihisr();
  }
#endif
#if (L1_DYN_DSP_DWNLD == 1)
  if( l1_apihisr.dyn_dwnld.running == TRUE )
  {
    l1_dyn_dwnld_apihisr();
  }
#endif

}

#if 0	/* FreeCalypso */
/*-------------------------------------------------------------*/
/* api_modem_hisr()                                            */
/*-------------------------------------------------------------*/
/*                                                             */
/* Parameters : none                                           */
/*                                                             */
/* Return     : n/a                                            */
/*                                                             */
/* Description : main function dealing with DSP->MCU interrupt */
/*                                                             */
/*-------------------------------------------------------------*/
void api_modem_hisr(void)
{
#if (FF_L1_FAST_DECODING == 1)
if(l1a_apihisr_com.fast_decoding.pending == TRUE)
  {
    extern void l1_fast_decoding_apihisr(void);
    l1_fast_decoding_apihisr();
  }

#endif /* FF_L1_FAST_DECODING */  
#if (FF_L1_IT_DSP_USF == 1)
  if(l1a_apihisr_com.usf.pending == TRUE)
  {
    extern void l1usf_apihisr(void);
    l1usf_apihisr();
  }
#endif
#if (FF_L1_IT_DSP_DTX == 1)
  if(l1a_apihisr_com.dtx.pending == TRUE)
  {
    extern void l1dtx_apihisr(void);
    l1dtx_apihisr();
  }
#endif
}
#endif	/* FreeCalypso */

/*-------------------------------------------------------------*/
/* l1_trigger_api_interrupt()                                  */
/*-------------------------------------------------------------*/
/*                                                             */
/* Parameters : none                                           */
/*                                                             */
/* Return     : n/a                                            */
/*                                                             */
/* Description : Trigger an MCU->DSP interrupt                 */
/*                                                             */
/*-------------------------------------------------------------*/
void l1_trigger_api_interrupt()
{
#if (CODE_VERSION == SIMULATION)
  extern void sim_it_mcu_to_dsp();
  sim_it_mcu_to_dsp();
#else
#if (L1_DYN_DSP_DWNLD == 1)
  *((volatile UWORD32 *)MEM_APIC_REG)|=ID_API_INT;
#else
  *((volatile UWORD32 *)MEM_APIC_REG)|=0x4;
#endif
#endif

}