system.h
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上传日期:2009-04-28
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- /*
- * 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()) {
- *IXDP2X01_CPLD_FLASH_REG = ((0 >> IXDP2X01_FLASH_WINDOW_BITS)
- | IXDP2X01_CPLD_FLASH_INTERN);
- *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 moves the flash bank register back to 0.
- */
- if (machine_is_ixdp2801()) {
- unsigned long reset_reg = *IXDP2X01_CPLD_RESET_REG;
- reset_reg = 0x55AA0000 | (reset_reg & 0x0000FFFF);
- *IXDP2X01_CPLD_RESET_REG = reset_reg;
- mb();
- *IXDP2X01_CPLD_RESET_REG = 0x80000000;
- }
- /*
- * We do a reset all if we are PCI master. We could be a slave and we
- * don't want to do anything funky on the PCI bus.
- */
- if (*IXP2000_STRAP_OPTIONS & CFG_PCI_BOOT_HOST) {
- *(IXP2000_RESET0) |= (RSTALL);
- }
- }