Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/arch/mips/sni/process.c | |
3 | * | |
4 | * Reset a SNI machine. | |
5 | */ | |
6 | #include <asm/io.h> | |
7 | #include <asm/reboot.h> | |
8 | #include <asm/system.h> | |
9 | #include <asm/sni.h> | |
10 | ||
11 | /* | |
12 | * This routine reboots the machine by asking the keyboard | |
13 | * controller to pulse the reset-line low. We try that for a while, | |
14 | * and if it doesn't work, we do some other stupid things. | |
15 | */ | |
c066a32a | 16 | static inline void kb_wait(void) |
1da177e4 LT |
17 | { |
18 | int i; | |
19 | ||
c066a32a | 20 | for (i = 0; i < 0x10000; i++) |
1da177e4 LT |
21 | if ((inb_p(0x64) & 0x02) == 0) |
22 | break; | |
23 | } | |
24 | ||
25 | /* XXX This ends up at the ARC firmware prompt ... */ | |
26 | void sni_machine_restart(char *command) | |
27 | { | |
28 | int i, j; | |
29 | ||
30 | /* This does a normal via the keyboard controller like a PC. | |
31 | We can do that easier ... */ | |
32 | local_irq_disable(); | |
33 | for (;;) { | |
c066a32a | 34 | for (i = 0; i < 100; i++) { |
1da177e4 | 35 | kb_wait(); |
c066a32a | 36 | for (j = 0; j < 100000 ; j++) |
1da177e4 | 37 | /* nothing */; |
21a151d8 | 38 | outb_p(0xfe, 0x64); /* pulse reset low */ |
1da177e4 LT |
39 | } |
40 | } | |
41 | } | |
42 | ||
1da177e4 LT |
43 | void sni_machine_power_off(void) |
44 | { | |
45 | *(volatile unsigned char *)PCIMT_CSWCSM = 0xfd; | |
46 | } |