include/asm-arm/arch-ebsa110/system.h

   1 /*
   2  * linux/include/asm-arm/arch-ebsa110/system.h
   3  *
   4  * Copyright (c) 1996-1999 Russell King.
   5  */
   6 #ifndef __ASM_ARCH_SYSTEM_H
   7 #define __ASM_ARCH_SYSTEM_H
   8
   9 /*
  10  * This machine must never stop it MCLK.  However, if we are
  11  * idle for a long time, slow the processor clock to MCLK.
  12  */
  13 static void arch_idle(void)
  14 {
  15         unsigned long start_idle;
  16
  17         start_idle = jiffies;
  18
  19         do {
  20                 if (current->need_resched || hlt_counter)
  21                         goto slow_out;
  22         } while (time_before(start_idle, jiffies + HZ/3));
  23
  24         cpu_do_idle(IDLE_CLOCK_SLOW);
  25
  26         while (!current->need_resched && !hlt_counter) {
  27                 /* do nothing slowly */
  28         }
  29
  30         cpu_do_idle(IDLE_CLOCK_FAST);
  31 slow_out:
  32 }
  33
  34 #define arch_reset(mode)        cpu_reset(0x80000000)
  35
  36 #endif