1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * 4*4882a593Smuzhiyun * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology 5*4882a593Smuzhiyun * Author: Fuxin Zhang, zhangfx@lemote.com 6*4882a593Smuzhiyun * Copyright (C) 2009 Lemote, Inc. 7*4882a593Smuzhiyun * Author: Zhangjin Wu, wuzhangjin@gmail.com 8*4882a593Smuzhiyun */ 9*4882a593Smuzhiyun #include <linux/init.h> 10*4882a593Smuzhiyun #include <linux/pm.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #include <asm/idle.h> 13*4882a593Smuzhiyun #include <asm/reboot.h> 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun #include <loongson.h> 16*4882a593Smuzhiyun loongson_reboot(void)17*4882a593Smuzhiyunstatic inline void loongson_reboot(void) 18*4882a593Smuzhiyun { 19*4882a593Smuzhiyun #ifndef CONFIG_CPU_JUMP_WORKAROUNDS 20*4882a593Smuzhiyun ((void (*)(void))ioremap(LOONGSON_BOOT_BASE, 4)) (); 21*4882a593Smuzhiyun #else 22*4882a593Smuzhiyun void (*func)(void); 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun func = (void *)ioremap(LOONGSON_BOOT_BASE, 4); 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun __asm__ __volatile__( 27*4882a593Smuzhiyun " .set noat \n" 28*4882a593Smuzhiyun " jr %[func] \n" 29*4882a593Smuzhiyun " .set at \n" 30*4882a593Smuzhiyun : /* No outputs */ 31*4882a593Smuzhiyun : [func] "r" (func)); 32*4882a593Smuzhiyun #endif 33*4882a593Smuzhiyun } 34*4882a593Smuzhiyun loongson_restart(char * command)35*4882a593Smuzhiyunstatic void loongson_restart(char *command) 36*4882a593Smuzhiyun { 37*4882a593Smuzhiyun /* do preparation for reboot */ 38*4882a593Smuzhiyun mach_prepare_reboot(); 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun /* reboot via jumping to boot base address */ 41*4882a593Smuzhiyun loongson_reboot(); 42*4882a593Smuzhiyun } 43*4882a593Smuzhiyun loongson_poweroff(void)44*4882a593Smuzhiyunstatic void loongson_poweroff(void) 45*4882a593Smuzhiyun { 46*4882a593Smuzhiyun mach_prepare_shutdown(); 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun /* 49*4882a593Smuzhiyun * It needs a wait loop here, but mips/kernel/reset.c already calls 50*4882a593Smuzhiyun * a generic delay loop, machine_hang(), so simply return. 51*4882a593Smuzhiyun */ 52*4882a593Smuzhiyun return; 53*4882a593Smuzhiyun } 54*4882a593Smuzhiyun loongson_halt(void)55*4882a593Smuzhiyunstatic void loongson_halt(void) 56*4882a593Smuzhiyun { 57*4882a593Smuzhiyun pr_notice("\n\n** You can safely turn off the power now **\n\n"); 58*4882a593Smuzhiyun while (1) { 59*4882a593Smuzhiyun if (cpu_wait) 60*4882a593Smuzhiyun cpu_wait(); 61*4882a593Smuzhiyun } 62*4882a593Smuzhiyun } 63*4882a593Smuzhiyun mips_reboot_setup(void)64*4882a593Smuzhiyunstatic int __init mips_reboot_setup(void) 65*4882a593Smuzhiyun { 66*4882a593Smuzhiyun _machine_restart = loongson_restart; 67*4882a593Smuzhiyun _machine_halt = loongson_halt; 68*4882a593Smuzhiyun pm_power_off = loongson_poweroff; 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun return 0; 71*4882a593Smuzhiyun } 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun arch_initcall(mips_reboot_setup); 74