Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/mips/sni/process.c | |
3 | * | |
4 | * Reset a SNI machine. | |
5 | */ | |
c861519f RB |
6 | #include <linux/delay.h> |
7 | ||
1da177e4 LT |
8 | #include <asm/io.h> |
9 | #include <asm/reboot.h> | |
1da177e4 LT |
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 | */ | |
c066a32a | 17 | static inline void kb_wait(void) |
1da177e4 LT |
18 | { |
19 | int i; | |
20 | ||
c066a32a | 21 | for (i = 0; i < 0x10000; i++) |
1da177e4 LT |
22 | if ((inb_p(0x64) & 0x02) == 0) |
23 | break; | |
24 | } | |
25 | ||
26 | /* XXX This ends up at the ARC firmware prompt ... */ | |
27 | void sni_machine_restart(char *command) | |
28 | { | |
ec7b9720 | 29 | int i; |
1da177e4 LT |
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 (;;) { | |
c066a32a | 35 | for (i = 0; i < 100; i++) { |
1da177e4 | 36 | kb_wait(); |
c861519f | 37 | udelay(50); |
21a151d8 | 38 | outb_p(0xfe, 0x64); /* pulse reset low */ |
c861519f | 39 | udelay(50); |
1da177e4 LT |
40 | } |
41 | } | |
42 | } | |
43 | ||
1da177e4 LT |
44 | void sni_machine_power_off(void) |
45 | { | |
46 | *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd; | |
47 | } |