x86: i8259A: remove redundant irq_descinitialization
[wrt350n-kernel.git] / include / asm-x86 / mach-default / mach_reboot.h
blob6adee6a97dec4f462776a59c2259842a4cfc7c71
1 /*
2 * arch/i386/mach-generic/mach_reboot.h
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
10 static inline void kb_wait(void)
12 int i;
14 for (i = 0; i < 0x10000; i++)
15 if ((inb_p(0x64) & 0x02) == 0)
16 break;
19 static inline void mach_reboot(void)
21 int i;
23 /* old method, works on most machines */
24 for (i = 0; i < 10; i++) {
25 kb_wait();
26 udelay(50);
27 outb(0xfe, 0x64); /* pulse reset low */
28 udelay(50);
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
37 for (i = 0; i < 10; i++) {
38 int cmd;
40 outb(0x20, 0x64); /* read Controller Command Byte */
41 udelay(50);
42 kb_wait();
43 udelay(50);
44 cmd = inb(0x60);
45 udelay(50);
46 kb_wait();
47 udelay(50);
48 outb(0x60, 0x64); /* write Controller Command Byte */
49 udelay(50);
50 kb_wait();
51 udelay(50);
52 outb(cmd | 0x14, 0x60); /* set "System flag" and "Keyboard Disabled" */
53 udelay(50);
54 kb_wait();
55 udelay(50);
56 outb(0xfe, 0x64); /* pulse reset low */
57 udelay(50);
61 #endif /* !_MACH_REBOOT_H */