release/src-rt-6.x.4708/linux/linux-2.6.36/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
  15 static inline void arch_idle(void)
  16 {
  17         cpu_do_idle();
  18 }
  19
  20 static 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 }