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/*

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

 *

 *  Copyright (C) 1996-2000 Russell King.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

#ifndef __ASM_ARCH_SYSTEM_H

#define __ASM_ARCH_SYSTEM_H

/*

 * EBSA110 idling methodology:

 *

 * We can not execute the "wait for interrupt" instruction since that

 * will stop our MCLK signal (which provides the clock for the glue

 * logic, and therefore the timer interrupt).

 *

 * Instead, we spin, polling the IRQ_STAT register for the occurrence

 * of any interrupt with core clock down to the memory clock.

 */

static inline void arch_idle(void)

{

        const char *irq_stat = (char *)0xff000000;

        /* disable clock switching */

        asm volatile ("mcr%? p15, 0, %0, c15, c2, 2" : : "r" (0));

        /* wait for an interrupt to occur */

        while (!*irq_stat)

                cpu_relax();

        /* enable clock switching */

        asm volatile ("mcr%? p15, 0, %0, c15, c1, 2" : : "r" (0));

}

#define arch_reset(mode)        cpu_reset(0x80000000)

#endif