LXR linux/arch/arm/mach-ixp2000/include/mach/system.h

   1/*
   2 * arch/arm/mach-ixp2000/include/mach/system.h
   3 *
   4 * Copyright (C) 2002 Intel Corp.
   5 * Copyricht (C) 2003-2005 MontaVista Software, Inc.
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 */
  11
  12#include <mach/hardware.h>
  13#include <asm/mach-types.h>
  14
  15static inline void arch_idle(void)
  16{
  17        cpu_do_idle();
  18}
  19
  20static inline void arch_reset(char mode, const char *cmd)
  21{
  22        local_irq_disable();
  23
  24        /*
  25         * Reset flash banking register so that we are pointing at
  26         * RedBoot bank.
  27         */
  28        if (machine_is_ixdp2401()) {
  29                ixp2000_reg_write(IXDP2X01_CPLD_FLASH_REG,
  30                                        ((0 >> IXDP2X01_FLASH_WINDOW_BITS)
  31                                                | IXDP2X01_CPLD_FLASH_INTERN));
  32                ixp2000_reg_wrb(IXDP2X01_CPLD_RESET_REG, 0xffffffff);
  33        }
  34
  35        /*
  36         * On IXDP2801 we need to write this magic sequence to the CPLD
  37         * to cause a complete reset of the CPU and all external devices
  38         * and move the flash bank register back to 0.
  39         */
  40        if (machine_is_ixdp2801() || machine_is_ixdp28x5()) {
  41                unsigned long reset_reg = *IXDP2X01_CPLD_RESET_REG;
  42
  43                reset_reg = 0x55AA0000 | (reset_reg & 0x0000FFFF);
  44                ixp2000_reg_write(IXDP2X01_CPLD_RESET_REG, reset_reg);
  45                ixp2000_reg_wrb(IXDP2X01_CPLD_RESET_REG, 0x80000000);
  46        }
  47
  48        ixp2000_reg_wrb(IXP2000_RESET0, RSTALL);
  49}
  50