1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * linux/arch/mips/sni/process.c 2 * linux/arch/mips/sni/process.c
4 * 3 *
5 * Reset a SNI machine. 4 * Reset a SNI machine.
6 */ 5 */
7 #include <linux/delay.h> <<
8 <<
9 #include <asm/io.h> 6 #include <asm/io.h>
10 #include <asm/reboot.h> 7 #include <asm/reboot.h>
>> 8 #include <asm/system.h>
11 #include <asm/sni.h> 9 #include <asm/sni.h>
12 10
13 /* 11 /*
14 * This routine reboots the machine by asking 12 * This routine reboots the machine by asking the keyboard
15 * controller to pulse the reset-line low. We 13 * 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 14 * and if it doesn't work, we do some other stupid things.
17 */ 15 */
18 static inline void kb_wait(void) 16 static inline void kb_wait(void)
19 { 17 {
20 int i; 18 int i;
21 19
22 for (i = 0; i < 0x10000; i++) 20 for (i = 0; i < 0x10000; i++)
23 if ((inb_p(0x64) & 0x02) == 0) 21 if ((inb_p(0x64) & 0x02) == 0)
24 break; 22 break;
25 } 23 }
26 24
27 /* XXX This ends up at the ARC firmware prompt 25 /* XXX This ends up at the ARC firmware prompt ... */
28 void sni_machine_restart(char *command) 26 void sni_machine_restart(char *command)
29 { 27 {
30 int i; !! 28 int i, j;
31 29
32 /* This does a normal via the keyboard 30 /* This does a normal via the keyboard controller like a PC.
33 We can do that easier ... */ 31 We can do that easier ... */
34 local_irq_disable(); 32 local_irq_disable();
35 for (;;) { 33 for (;;) {
36 for (i = 0; i < 100; i++) { 34 for (i = 0; i < 100; i++) {
37 kb_wait(); 35 kb_wait();
38 udelay(50); !! 36 for (j = 0; j < 100000 ; j++)
>> 37 /* nothing */;
39 outb_p(0xfe, 0x64); 38 outb_p(0xfe, 0x64); /* pulse reset low */
40 udelay(50); <<
41 } 39 }
42 } 40 }
43 } 41 }
44 42
45 void sni_machine_power_off(void) 43 void sni_machine_power_off(void)
46 { 44 {
47 *(volatile unsigned char *)PCIMT_CSWCS 45 *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd;
48 } 46 }
49 47
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