time.c (84abd88a70090cf00f9e45c3a81680874f17626e) time.c (5619c28061ff9d2559a93eaba492935530f2a513)
1/*
2 * Copyright (c) 1991,1992,1995 Linus Torvalds
3 * Copyright (c) 1994 Alan Modra
4 * Copyright (c) 1995 Markus Kuhn
5 * Copyright (c) 1996 Ingo Molnar
6 * Copyright (c) 1998 Andrea Arcangeli
7 * Copyright (c) 2002,2006 Vojtech Pavlik
8 * Copyright (c) 2003 Andi Kleen

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65
66 /* Optimized out for !IO_APIC and x86_64 */
67 if (timer_ack) {
68 /*
69 * Subtle, when I/O APICs are used we have to ack timer IRQ
70 * manually to deassert NMI lines for the watchdog if run
71 * on an 82489DX-based system.
72 */
1/*
2 * Copyright (c) 1991,1992,1995 Linus Torvalds
3 * Copyright (c) 1994 Alan Modra
4 * Copyright (c) 1995 Markus Kuhn
5 * Copyright (c) 1996 Ingo Molnar
6 * Copyright (c) 1998 Andrea Arcangeli
7 * Copyright (c) 2002,2006 Vojtech Pavlik
8 * Copyright (c) 2003 Andi Kleen

--- 56 unchanged lines hidden (view full) ---

65
66 /* Optimized out for !IO_APIC and x86_64 */
67 if (timer_ack) {
68 /*
69 * Subtle, when I/O APICs are used we have to ack timer IRQ
70 * manually to deassert NMI lines for the watchdog if run
71 * on an 82489DX-based system.
72 */
73 spin_lock(&i8259A_lock);
73 raw_spin_lock(&i8259A_lock);
74 outb(0x0c, PIC_MASTER_OCW3);
75 /* Ack the IRQ; AEOI will end it automatically. */
76 inb(PIC_MASTER_POLL);
74 outb(0x0c, PIC_MASTER_OCW3);
75 /* Ack the IRQ; AEOI will end it automatically. */
76 inb(PIC_MASTER_POLL);
77 spin_unlock(&i8259A_lock);
77 raw_spin_unlock(&i8259A_lock);
78 }
79
80 global_clock_event->event_handler(global_clock_event);
81
82 /* MCA bus quirk: Acknowledge irq0 by setting bit 7 in port 0x61 */
83 if (MCA_bus)
84 outb_p(inb_p(0x61)| 0x80, 0x61);
85

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79
80 global_clock_event->event_handler(global_clock_event);
81
82 /* MCA bus quirk: Acknowledge irq0 by setting bit 7 in port 0x61 */
83 if (MCA_bus)
84 outb_p(inb_p(0x61)| 0x80, 0x61);
85

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