Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/arch/mips/sni/process.c | |
4 | * | |
5 | * Reset a SNI machine. | |
6 | */ | |
c861519f RB |
7 | #include <linux/delay.h> |
8 | ||
1da177e4 LT |
9 | #include <asm/io.h> |
10 | #include <asm/reboot.h> | |
1da177e4 LT |
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 | */ | |
c066a32a | 18 | static inline void kb_wait(void) |
1da177e4 LT |
19 | { |
20 | int i; | |
21 | ||
c066a32a | 22 | for (i = 0; i < 0x10000; i++) |
1da177e4 LT |
23 | if ((inb_p(0x64) & 0x02) == 0) |
24 | break; | |
25 | } | |
26 | ||
27 | /* XXX This ends up at the ARC firmware prompt ... */ | |
28 | void sni_machine_restart(char *command) | |
29 | { | |
ec7b9720 | 30 | int i; |
1da177e4 LT |
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 (;;) { | |
c066a32a | 36 | for (i = 0; i < 100; i++) { |
1da177e4 | 37 | kb_wait(); |
c861519f | 38 | udelay(50); |
21a151d8 | 39 | outb_p(0xfe, 0x64); /* pulse reset low */ |
c861519f | 40 | udelay(50); |
1da177e4 LT |
41 | } |
42 | } | |
43 | } | |
44 | ||
1da177e4 LT |
45 | void sni_machine_power_off(void) |
46 | { | |
47 | *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd; | |
48 | } |