1/* 2 * linux/include/asm-arm/arch-ixp2000/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 <asm/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) 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