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view src/cs/services/tty/tty_task.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

/**
 * @file   tty_task.c
 *
 * Coding of the main TTY function : tty_core
 * This function loop in the process message function for waiting messages.
 *
 * @author	Frederic Turgis (f-turgis@ti.com) & Gerard Cauvy (g-cauvy@ti.com)
 * @version 0.1
 */

/*
 * History:
 *
 * 	Date       	Modification
 *  ------------------------------------
 *  01/27/2003	Create
 *
 * (C) Copyright 2003 by Texas Instruments Incorporated, All Rights Reserved
 */

#ifndef _WINDOWS
  #include "config/l1sw.cfg"
#endif

#include "tty/tty_env.h"
#include "tty/tty_i.h"

#include "rv/rv_general.h"
#include "rvf/rvf_api.h"
#include "rvm/rvm_use_id_list.h"

#if (TRACE_TYPE == 1) || (TRACE_TYPE == 4)
  #ifndef _WINDOWS
    #include "config/sys.cfg"
    #include "config/chipset.cfg"
  #endif
  #include "l1_types.h"
  #include "l1_confg.h"
  #include "l1_trace.h"
#endif

#if (L1_GTT == 1)
  /* External prototype. */
  extern void l1gtt_initialize(void);
  extern void l1gtt_exit(void);
  extern void l1gtt_main_processing(void);
  extern void l1gtt_init_trace(void);
#else
  /* Dummy functions */
  void l1gtt_initialize(void) {}
  void l1gtt_exit(void) {}
  void l1gtt_main_processing(void) {}
  void l1gtt_init_trace(void) {}
#endif


/**
 * @name Functions implementation
 *
 */
/*@{*/

/**
 * function: tty_core
 */
T_RV_RET tty_core(void)
{
  BOOLEAN error_occured = FALSE;
  T_RV_HDR* msg_p;
  UINT16 received_event;

  TTY_SEND_TRACE("TTY TASK Started", RV_TRACE_LEVEL_DEBUG_HIGH );

  l1gtt_init_trace();

  /* loop to process messages */
  while (error_occured == FALSE)
  {
    /* Wait for the necessary events. */
    received_event = rvf_wait ( 0xffff,0);

    if (received_event & TTY_INIT_EVENT_MASK)
    {
      l1gtt_initialize();
    }
    else if (received_event & TTY_EXIT_EVENT_MASK)
    {
      l1gtt_exit();
    }
    else if (received_event & TTY_DATA_EVENT_MASK)
    {
      l1gtt_main_processing();
    }
  }

  return RV_OK;
}