1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 *  linux/arch/mips/sni/process.c
 4 *
 5 *  Reset a SNI machine.
 6 */
 7#include <linux/delay.h>
 8
 9#include <asm/io.h>
10#include <asm/reboot.h>
11#include <asm/sni.h>
12
13/*
14 * This routine reboots the machine by asking the keyboard
15 * controller to pulse the reset-line low. We try that for a while,
16 * and if it doesn't work, we do some other stupid things.
17 */
18static inline void kb_wait(void)
19{
20	int i;
21
22	for (i = 0; i < 0x10000; i++)
23		if ((inb_p(0x64) & 0x02) == 0)
24			break;
25}
26
27/* XXX This ends up at the ARC firmware prompt ...  */
28void sni_machine_restart(char *command)
29{
30	int i;
31
32	/* This does a normal via the keyboard controller like a PC.
33	   We can do that easier ...  */
34	local_irq_disable();
35	for (;;) {
36		for (i = 0; i < 100; i++) {
37			kb_wait();
38			udelay(50);
39			outb_p(0xfe, 0x64);	 /* pulse reset low */
40			udelay(50);
41		}
42	}
43}
44
45void sni_machine_power_off(void)
46{
47	*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
48}

 
 1/*
 2 *  linux/arch/mips/sni/process.c
 3 *
 4 *  Reset a SNI machine.
 5 */
 6#include <linux/delay.h>
 7
 8#include <asm/io.h>
 9#include <asm/reboot.h>
10#include <asm/sni.h>
11
12/*
13 * This routine reboots the machine by asking the keyboard
14 * controller to pulse the reset-line low. We try that for a while,
15 * and if it doesn't work, we do some other stupid things.
16 */
17static inline void kb_wait(void)
18{
19	int i;
20
21	for (i = 0; i < 0x10000; i++)
22		if ((inb_p(0x64) & 0x02) == 0)
23			break;
24}
25
26/* XXX This ends up at the ARC firmware prompt ...  */
27void sni_machine_restart(char *command)
28{
29	int i;
30
31	/* This does a normal via the keyboard controller like a PC.
32	   We can do that easier ...  */
33	local_irq_disable();
34	for (;;) {
35		for (i = 0; i < 100; i++) {
36			kb_wait();
37			udelay(50);
38			outb_p(0xfe, 0x64);	 /* pulse reset low */
39			udelay(50);
40		}
41	}
42}
43
44void sni_machine_power_off(void)
45{
46	*(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
47}