view src/gpf/misc/trace.c @ 220:0ed36de51973

ABB semaphore protection overhaul The ABB semaphone protection logic that came with TCS211 from TI was broken in several ways: * Some semaphore-protected functions were called from Application_Initialize() context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with NU_INVALID_SUSPEND in this context, but the return value wasn't checked, and NU_Release_Semaphore() would be called unconditionally at the end. The latter call would increment the semaphore count past 1, making the semaphore no longer binary and thus no longer effective for resource protection. The fix is to check the return value from NU_Obtain_Semaphore() and skip the NU_Release_Semaphore() call if the semaphore wasn't properly obtained. * Some SPI hardware manipulation was being done before entering the semaphore- protected critical section. The fix is to reorder the code: first obtain the semaphore, then do everything else. * In the corner case of L1/DSP recovery, l1_abb_power_on() would call some non-semaphore-protected ABB & SPI init functions. The fix is to skip those calls in the case of recovery. * A few additional corner cases existed, all of which are fixed by making ABB semaphore protection 100% consistent for all ABB functions and code paths. There is still one remaining problem of priority inversion: suppose a low- priority task calls an ABB function, and some medium-priority task just happens to preempt right in the middle of that semaphore-protected ABB operation. Then the high-priority SPI task is locked out for a non-deterministic time until that medium-priority task finishes its work and goes back to sleep. This priority inversion problem remains outstanding for now.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 26 Apr 2021 20:55:25 +0000
parents 4e78acac3d88
children
line wrap: on
line source

/* 
+------------------------------------------------------------------------------
|  File:       trace.c
+------------------------------------------------------------------------------
|  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 Modul provides data and functions for fast in memory tracing
+----------------------------------------------------------------------------- 
*/ 

#ifndef TRACE_C
#define TRACE_C
#endif
#define FAST_TRACE

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

#include <string.h>
#include "typedefs.h"
#include "header.h"
#include "custom.h"
#include "vsi.h"
#include "gsm.h"
#include "prim.h"
#include "pei.h"
#include "tok.h"

#include "trace.h"

#include <string.h>
#include <stdio.h>
#include "message.h"

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

#define TRC_ENTITY 0x60
#define TRC_FILE   1


#ifdef OPTION_MULTITHREAD
#define VSI_CALLER "ACI",
#define VSI_CALLER_SINGLE "ACI"
#else
#define VSI_CALLER
#define VSI_CALLER_SINGLE
#endif


/*==== TYPES ======================================================*/

/*==== VARIABLES ==================================================*/


/*==== FUNCTIONS ==================================================*/
/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)        MODULE  : TRACE                    |
| STATE   : code                  ROUTINE : trc_init                 |
+--------------------------------------------------------------------+

  PURPOSE : This function is called to initialize the trace function

*/

GLOBAL void trc_init
            (
              void
            )
{
  trc_p_buffer     = trc_buffer;
  trc_p_buffer_end = &trc_buffer[TRC_BUF_LEN-1];
  trc_wrap_around  = FALSE;
  trc_wrap_around_enable  = TRUE;
  trc_enabled      = TRUE;
  /*semTRC = vsi_s_open (VSI_CALLER "TRC"); */
}


/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)        MODULE  : TRACE                    |
| STATE   : code                  ROUTINE : trc_enable_wrap_around   |
+--------------------------------------------------------------------+

  PURPOSE : This function is called to enable wrap around

*/

GLOBAL void trc_enable_wrap_around
            (
              void
            )
{
  trc_wrap_around_enable = TRUE;
}


/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)        MODULE  : TRACE                    |
| STATE   : code                  ROUTINE : trc_disable_wrap_around  |
+--------------------------------------------------------------------+

  PURPOSE : This function is called to disable wrap around

*/

GLOBAL void trc_disable_wrap_around
            (
              void
            )
{
  trc_wrap_around_enable  = FALSE;
}


/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)        MODULE  : TRACE                    |
| STATE   : code                  ROUTINE : trc_enable               |
+--------------------------------------------------------------------+

  PURPOSE : This function is called to enable fast trace

*/

GLOBAL void trc_enable
            (
              void
            )
{
  trc_enabled = TRUE;
}


/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)        MODULE  : TRACE                    |
| STATE   : code                  ROUTINE : trc_disable              |
+--------------------------------------------------------------------+

  PURPOSE : This function is called to disable fast trace

*/

GLOBAL void trc_disable
            (
              void
            )
{
  trc_enabled  = FALSE;
}


/*
+--------------------------------------------------------------------+
| PROJECT : GSM-F&D (8411)        MODULE  : RA_SHM                   |
| STATE   : code                  ROUTINE : trc_dump                 |
+--------------------------------------------------------------------+

  PURPOSE : the content of the stored dump is dumped 
            into the system trace window.
  
*/

GLOBAL void trc_dump (void)
{
  T_TRC_BUF_ENTRY *p_readOut;
  ULONG *p;
  ULONG i;
  char buf [40];
  char buf1 [40];

#ifndef NEW_FRAME
  vsi_o_trace ("", 0xff, "---FASTTRACEBUFFER---");
#else
  vsi_o_ttrace (0, 0xff, "---FASTTRACEBUFFER---");
#endif
  if (trc_wrap_around)
  {
    for (p_readOut= trc_p_buffer;
         p_readOut < trc_p_buffer_end;
         p_readOut++)
    {
      p = (ULONG*)p_readOut;

      buf1[0]='\0';

      for (i = sizeof(T_TRC_BUF_ENTRY); i>=0; i-=sizeof(ULONG))
      {
        sprintf(buf1, "0x%x ", *p++);
        strcat (buf, buf1);
      }
#ifndef NEW_FRAME
      vsi_o_trace ("", 0xff, buf);
      vsi_t_sleep("", 1);
#else
      vsi_o_ttrace (0, 0xff, buf);
      vsi_t_sleep(0, 1);
#endif
    }
  }
  for (p_readOut= trc_buffer;
       p_readOut < trc_p_buffer;
       p_readOut++)
  {
    p = (ULONG*)p_readOut;

    buf1[0]='\0';

    for (i = sizeof(T_TRC_BUF_ENTRY); i>=0; i-=sizeof(ULONG))
    {
      sprintf(buf1, "0x%x ", *p++);
      strcat (buf, buf1);
    }
#ifndef NEW_FRAME
    vsi_o_trace ("", 0xff, buf);
    vsi_t_sleep("", 1);
#else
    vsi_o_ttrace (0, 0xff, buf);
    vsi_t_sleep(0, 1);
#endif
  }

#ifndef NEW_FRAME
  vsi_o_trace ("", 0xff, "---END---");
#else
  vsi_o_ttrace (0, 0xff, "---END---");
#endif
}