1/*
2 *  linux/arch/mips/sni/process.c
3 *
4 *  Reset a SNI machine.
5 */
6#include <asm/io.h>
7#include <asm/reboot.h>
8#include <asm/sni.h>
9
10/*
11 * This routine reboots the machine by asking the keyboard
12 * controller to pulse the reset-line low. We try that for a while,
13 * and if it doesn't work, we do some other stupid things.
14 */
15static inline void kb_wait(void)
16{
17	int i;
18
19	for (i = 0; i < 0x10000; i++)
20		if ((inb_p(0x64) & 0x02) == 0)
21			break;
22}
23
24/* XXX This ends up at the ARC firmware prompt ...  */
25void sni_machine_restart(char *command)
26{
27	int i, j;
28
29	/* This does a normal via the keyboard controller like a PC.
30	   We can do that easier ...  */
31	local_irq_disable();
32	for (;;) {
33		for (i = 0; i < 100; i++) {
34			kb_wait();
35			for (j = 0; j < 100000 ; j++)
36				/* nothing */;
37			outb_p(0xfe, 0x64);	 /* pulse reset low */
38		}
39	}
40}
41
42void sni_machine_power_off(void)
43{
44	*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
45}
46