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system.h

/*
 * arch/arm/mach-ixp2000/include/mach/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 <mach/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);
}

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