1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 4 * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology 5 * Author: Fuxin Zhang, zhangfx@lemote.com 6 * Copyright (C) 2009 Lemote, Inc. 7 * Author: Zhangjin Wu, wuzhangjin@gmail.com 8 */ 9 #include <linux/init.h> 10 #include <linux/pm.h> 11 12 #include <asm/idle.h> 13 #include <asm/reboot.h> 14 15 #include <loongson.h> 16 loongson_reboot(void)17static inline void loongson_reboot(void) 18 { 19 #ifndef CONFIG_CPU_JUMP_WORKAROUNDS 20 ((void (*)(void))ioremap(LOONGSON_BOOT_BASE, 4)) (); 21 #else 22 void (*func)(void); 23 24 func = (void *)ioremap(LOONGSON_BOOT_BASE, 4); 25 26 __asm__ __volatile__( 27 " .set noat \n" 28 " jr %[func] \n" 29 " .set at \n" 30 : /* No outputs */ 31 : [func] "r" (func)); 32 #endif 33 } 34 loongson_restart(char * command)35static void loongson_restart(char *command) 36 { 37 /* do preparation for reboot */ 38 mach_prepare_reboot(); 39 40 /* reboot via jumping to boot base address */ 41 loongson_reboot(); 42 } 43 loongson_poweroff(void)44static void loongson_poweroff(void) 45 { 46 mach_prepare_shutdown(); 47 48 /* 49 * It needs a wait loop here, but mips/kernel/reset.c already calls 50 * a generic delay loop, machine_hang(), so simply return. 51 */ 52 return; 53 } 54 loongson_halt(void)55static void loongson_halt(void) 56 { 57 pr_notice("\n\n** You can safely turn off the power now **\n\n"); 58 while (1) { 59 if (cpu_wait) 60 cpu_wait(); 61 } 62 } 63 mips_reboot_setup(void)64static int __init mips_reboot_setup(void) 65 { 66 _machine_restart = loongson_restart; 67 _machine_halt = loongson_halt; 68 pm_power_off = loongson_poweroff; 69 70 return 0; 71 } 72 73 arch_initcall(mips_reboot_setup); 74