xref: /openbmc/linux/arch/mips/dec/reset.c (revision b2441318) 
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 
back_to_prom(void)15 static inline void __noreturn back_to_prom(void)
16 {
17 	noret_func_t func = (void *)CKSEG1ADDR(0x1fc00000);
18 
19 	func();
20 }
21 
dec_machine_restart(char * command)22 void __noreturn dec_machine_restart(char *command)
23 {
24 	back_to_prom();
25 }
26 
dec_machine_halt(void)27 void __noreturn dec_machine_halt(void)
28 {
29 	back_to_prom();
30 }
31 
dec_machine_power_off(void)32 void __noreturn dec_machine_power_off(void)
33 {
34     /* DECstations don't have a software power switch */
35 	back_to_prom();
36 }
37 
dec_intr_halt(int irq,void * dev_id)38 irqreturn_t dec_intr_halt(int irq, void *dev_id)
39 {
40 	dec_machine_halt();
41 }
42