1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Reset a DECstation machine. 4 * 5 * Copyright (C) 199x the Anonymous 6 * Copyright (C) 2001, 2002, 2003 Maciej W. Rozycki 7 */ 8 #include <linux/interrupt.h> 9 #include <linux/linkage.h> 10 11 #include <asm/addrspace.h> 12 13 typedef void __noreturn (* noret_func_t)(void); 14 15 static inline void __noreturn back_to_prom(void) 16 { 17 noret_func_t func = (void *)CKSEG1ADDR(0x1fc00000); 18 19 func(); 20 } 21 22 void __noreturn dec_machine_restart(char *command) 23 { 24 back_to_prom(); 25 } 26 27 void __noreturn dec_machine_halt(void) 28 { 29 back_to_prom(); 30 } 31 32 void __noreturn dec_machine_power_off(void) 33 { 34 /* DECstations don't have a software power switch */ 35 back_to_prom(); 36 } 37 38 irqreturn_t dec_intr_halt(int irq, void *dev_id) 39 { 40 dec_machine_halt(); 41 } 42