1/* 2 * This program is free software; you can redistribute it and/or modify it 3 * under the terms of the GNU General Public License as published by the 4 * Free Software Foundation; either version 2 of the License, or (at your 5 * option) any later version. 6 * 7 * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology 8 * Author: Fuxin Zhang, zhangfx@lemote.com 9 * Copyright (C) 2009 Lemote, Inc. 10 * Author: Zhangjin Wu, wuzhangjin@gmail.com 11 */ 12#include <linux/init.h> 13#include <linux/pm.h> 14 15#include <asm/reboot.h> 16 17#include <loongson.h> 18 19static inline void loongson_reboot(void) 20{ 21#ifndef CONFIG_CPU_JUMP_WORKAROUNDS 22 ((void (*)(void))ioremap_nocache(LOONGSON_BOOT_BASE, 4)) (); 23#else 24 void (*func)(void); 25 26 func = (void *)ioremap_nocache(LOONGSON_BOOT_BASE, 4); 27 28 __asm__ __volatile__( 29 " .set noat \n" 30 " jr %[func] \n" 31 " .set at \n" 32 : /* No outputs */ 33 : [func] "r" (func)); 34#endif 35} 36 37static void loongson_restart(char *command) 38{ 39 /* do preparation for reboot */ 40 mach_prepare_reboot(); 41 42 /* reboot via jumping to boot base address */ 43 loongson_reboot(); 44} 45 46static void loongson_poweroff(void) 47{ 48 mach_prepare_shutdown(); 49 unreachable(); 50} 51 52static void loongson_halt(void) 53{ 54 pr_notice("\n\n** You can safely turn off the power now **\n\n"); 55 while (1) { 56 if (cpu_wait) 57 cpu_wait(); 58 } 59} 60 61static int __init mips_reboot_setup(void) 62{ 63 _machine_restart = loongson_restart; 64 _machine_halt = loongson_halt; 65 pm_power_off = loongson_poweroff; 66 67 return 0; 68} 69 70arch_initcall(mips_reboot_setup); 71