tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 *IXDP2X01_CPLD_FLASH_REG = ((0 >> IXDP2X01_FLASH_WINDOW_BITS)
30 | IXDP2X01_CPLD_FLASH_INTERN);
31 *IXDP2X01_CPLD_RESET_REG = 0xffffffff;
32 }
33
34 /*
35 * On IXDP2801 we need to write this magic sequence to the CPLD
36 * to cause a complete reset of the CPU and all external devices
37 * and moves the flash bank register back to 0.
38 */
39 if (machine_is_ixdp2801()) {
40 unsigned long reset_reg = *IXDP2X01_CPLD_RESET_REG;
41 reset_reg = 0x55AA0000 | (reset_reg & 0x0000FFFF);
42 *IXDP2X01_CPLD_RESET_REG = reset_reg;
43 mb();
44 *IXDP2X01_CPLD_RESET_REG = 0x80000000;
45 }
46
47 /*
48 * We do a reset all if we are PCI master. We could be a slave and we
49 * don't want to do anything funky on the PCI bus.
50 */
51 if (*IXP2000_STRAP_OPTIONS & CFG_PCI_BOOT_HOST) {
52 *(IXP2000_RESET0) |= (RSTALL);
53 }
54}