1 // SPDX-License-Identifier: GPL-2.0 1 // SPDX-License-Identifier: GPL-2.0
2 /* 2 /*
3 * linux/arch/mips/sni/process.c 3 * linux/arch/mips/sni/process.c
4 * 4 *
5 * Reset a SNI machine. 5 * Reset a SNI machine.
6 */ 6 */
7 #include <linux/delay.h> 7 #include <linux/delay.h>
8 8
9 #include <asm/io.h> 9 #include <asm/io.h>
10 #include <asm/reboot.h> 10 #include <asm/reboot.h>
11 #include <asm/sni.h> 11 #include <asm/sni.h>
12 12
13 /* 13 /*
14 * This routine reboots the machine by asking 14 * This routine reboots the machine by asking the keyboard
15 * controller to pulse the reset-line low. We 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 st 16 * and if it doesn't work, we do some other stupid things.
17 */ 17 */
18 static inline void kb_wait(void) 18 static inline void kb_wait(void)
19 { 19 {
20 int i; 20 int i;
21 21
22 for (i = 0; i < 0x10000; i++) 22 for (i = 0; i < 0x10000; i++)
23 if ((inb_p(0x64) & 0x02) == 0) 23 if ((inb_p(0x64) & 0x02) == 0)
24 break; 24 break;
25 } 25 }
26 26
27 /* XXX This ends up at the ARC firmware prompt 27 /* XXX This ends up at the ARC firmware prompt ... */
28 void sni_machine_restart(char *command) 28 void sni_machine_restart(char *command)
29 { 29 {
30 int i; 30 int i;
31 31
32 /* This does a normal via the keyboard 32 /* This does a normal via the keyboard controller like a PC.
33 We can do that easier ... */ 33 We can do that easier ... */
34 local_irq_disable(); 34 local_irq_disable();
35 for (;;) { 35 for (;;) {
36 for (i = 0; i < 100; i++) { 36 for (i = 0; i < 100; i++) {
37 kb_wait(); 37 kb_wait();
38 udelay(50); 38 udelay(50);
39 outb_p(0xfe, 0x64); 39 outb_p(0xfe, 0x64); /* pulse reset low */
40 udelay(50); 40 udelay(50);
41 } 41 }
42 } 42 }
43 } 43 }
44 44
45 void sni_machine_power_off(void) 45 void sni_machine_power_off(void)
46 { 46 {
47 *(volatile unsigned char *)PCIMT_CSWCS 47 *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
48 } 48 }
49 49
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.