arch/m68k-all/kernel/kernel_intr.c

   1 /*
   2  * Copyright (C) 2012, The AROS Development Team
   3  * All right reserved.
   4  * Author: Jason S. McMullan <jason.mcmullan@gmail.com>
   5  *
   6  * Licensed under the AROS PUBLIC LICENSE (APL) Version 1.1
   7  */
   8
   9 #include <exec/execbase.h>
  10 #include <hardware/intbits.h>
  11 #include <proto/exec.h>
  12
  13 #include <kernel_base.h>
  14 #include <kernel_intr.h>
  15 #include <kernel_scheduler.h>
  16 #include <kernel_syscall.h>
  17
  18 /* Called on leaveing the interrupt.
  19  * This function returns TRUE if the task scheduler is needed.
  20  */
  21 BOOL core_ExitIntr(VOID)
  22 {
  23     /* Soft interrupt requested? It's high time to do it */
  24     if (SysBase->SysFlags & SFF_SoftInt)
  25         core_Cause(INTB_SOFTINT, 1L << INTB_SOFTINT);
  26
  27     /* If task switching is disabled, do nothing */
  28     if (SysBase->TDNestCnt < 0)
  29     {
  30         /*
  31          * Do not disturb task if it's not necessary.
  32          * Reschedule only if switch pending flag is set. Exit otherwise.
  33          */
  34         if (SysBase->AttnResched & ARF_AttnSwitch)
  35         {
  36             /* Run task scheduling sequence */
  37             return TRUE;
  38         }
  39     }
  40
  41     return FALSE;
  42 }
  43
  44