linux-next/include/asm-arm/arch-ixp2000/system.h

/*
 * linux/include/asm-arm/arch-ixp2000/system.h
 *
 * Copyright (C) 2002 Intel Corp.
 * Copyricht (C) 2003-2005 MontaVista Software, Inc.
 *
 * 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.
 */

#include <asm/hardware.h>
#include <asm/mach-types.h>

static inline void arch_idle(void)
{
	cpu_do_idle();
}

static inline void arch_reset(char mode)
{
	local_irq_disable();

	/*
	 * Reset flash banking register so that we are pointing at
	 * RedBoot bank.
	 */
	if (machine_is_ixdp2401()) {
		ixp2000_reg_write(IXDP2X01_CPLD_FLASH_REG,
					((0 >> IXDP2X01_FLASH_WINDOW_BITS)
						| IXDP2X01_CPLD_FLASH_INTERN));
		ixp2000_reg_wrb(IXDP2X01_CPLD_RESET_REG, 0xffffffff);
	}

	/*
	 * On IXDP2801 we need to write this magic sequence to the CPLD
	 * to cause a complete reset of the CPU and all external devices
	 * and move the flash bank register back to 0.
	 */
	if (machine_is_ixdp2801() || machine_is_ixdp28x5()) {
		unsigned long reset_reg = *IXDP2X01_CPLD_RESET_REG;

		reset_reg = 0x55AA0000 | (reset_reg & 0x0000FFFF);
		ixp2000_reg_write(IXDP2X01_CPLD_RESET_REG, reset_reg);
		ixp2000_reg_wrb(IXDP2X01_CPLD_RESET_REG, 0x80000000);
	}

	ixp2000_reg_wrb(IXP2000_RESET0, RSTALL);
}