arch/arm-native/exec/exec_idle.c

   1 /*
   2     Copyright © 1995-2015, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 #define DEBUG 0
   7
   8 #include <proto/exec.h>
   9 #include "exec_intern.h"
  10 #include "kernel_intern.h"
  11 #include "kernel_cpu.h"
  12 #include "kernel_syscall.h"
  13
  14 #include "etask.h"
  15
  16 void IdleTask(struct ExecBase *SysBase)
  17 {
  18 #if defined(DEBUG)
  19     struct Task *thisTask = FindTask(NULL);
  20     int cpunum = GetCPUNumber();
  21 #endif
  22
  23     D(bug("[IDLE:%02d] %s started up\n", cpunum, thisTask->tc_Node.ln_Name));
  24
  25     asm volatile ("swi %[swi_no]" : : [swi_no] "I" (SC_SUPERSTATE) : "lr");
  26     asm volatile ("swi %[swi_no]" : : [swi_no] "I" (SC_STI) : "lr");
  27
  28     do
  29     {
  30         /* forever */
  31         D(bug("[IDLE:%02d] CPU has idled for %d seconds..\n", GetIntETask(thisTask)->iet_CpuTime.tv_secs));
  32         asm volatile("mov r0, #0\n\t mcr p15, 0, r0, c7, c0, 4":::"r0");
  33     } while(1);
  34 }