projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * arch/i386/mach-generic/mach_reboot.h | |
| 3 | * | |
| 4 | * Machine specific reboot functions for generic. | |
| 5 | * Split out from reboot.c by Osamu Tomita <tomita@cinet.co.jp> | |
| 6 | */ | |
| 7 | #ifndef _MACH_REBOOT_H | |
| 8 | #define _MACH_REBOOT_H | |
| 9 | ||
| 10 | static inline void kb_wait(void) | |
| 11 | { | |
| 12 | int i; | |
| 13 | ||
| 14 | for (i = 0; i < 0x10000; i++) | |
| 15 | if ((inb_p(0x64) & 0x02) == 0) | |
| 16 | break; | |
| 17 | } | |
| 18 | ||
| 19 | static inline void mach_reboot(void) | |
| 20 | { | |
| 21 | int i; | |
| 8b937898 TF |
22 | |
| 23 | /* old method, works on most machines */ | |
| a6f5deb2 | 24 | for (i = 0; i < 10; i++) { |
| 8b937898 TF |
25 | kb_wait(); |
| 26 | udelay(50); | |
| 27 | outb(0xfe, 0x64); /* pulse reset low */ | |
| 28 | udelay(50); | |
| 29 | } | |
| 30 | ||
| 31 | /* New method: sets the "System flag" which, when set, indicates | |
| 32 | * successful completion of the keyboard controller self-test (Basic | |
| 33 | * Assurance Test, BAT). This is needed for some machines with no | |
| 34 | * keyboard plugged in. This read-modify-write sequence sets only the | |
| 35 | * system flag | |
| 36 | */ | |
| 37 | for (i = 0; i < 10; i++) { | |
| 38 | int cmd; | |
| 39 | ||
| 40 | outb(0x20, 0x64); /* read Controller Command Byte */ | |
| 41 | udelay(50); | |
| 42 | kb_wait(); | |
| 43 | udelay(50); | |
| 44 | cmd = inb(0x60); | |
| 45 | udelay(50); | |
| 1da177e4 LT |
46 | kb_wait(); |
| 47 | udelay(50); | |
| 59f4e7d5 TF |
48 | outb(0x60, 0x64); /* write Controller Command Byte */ |
| 49 | udelay(50); | |
| 50 | kb_wait(); | |
| 51 | udelay(50); | |
| 8b937898 | 52 | outb(cmd | 0x04, 0x60); /* set "System flag" */ |
| 59f4e7d5 TF |
53 | udelay(50); |
| 54 | kb_wait(); | |
| 55 | udelay(50); | |
| 56 | outb(0xfe, 0x64); /* pulse reset low */ | |
| 1da177e4 LT |
57 | udelay(50); |
| 58 | } | |
| 59 | } | |
| 60 | ||
| 61 | #endif /* !_MACH_REBOOT_H */ |