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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-18 17:05:47 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-18 17:05:47 -0400
commit78f28b7c555359c67c2a0d23f7436e915329421e (patch)
tree7f8197f82f83c0c19fd9bc85b5d10b5a755d0656 /arch/x86/kernel/time_32.c
parent3240a77b515f4a15e24d8a3a2135bc87b02cf1d6 (diff)
parent7bd867dfb4e0357e06a3211ab2bd0e714110def3 (diff)
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (38 commits) x86: Move get/set_wallclock to x86_platform_ops x86: platform: Fix section annotations x86: apic namespace cleanup x86: Distangle ioapic and i8259 x86: Add Moorestown early detection x86: Add hardware_subarch ID for Moorestown x86: Add early platform detection x86: Move tsc_init to late_time_init x86: Move tsc_calibration to x86_init_ops x86: Replace the now identical time_32/64.c by time.c x86: time_32/64.c unify profile_pc x86: Move calibrate_cpu to tsc.c x86: Make timer setup and global variables the same in time_32/64.c x86: Remove mca bus ifdef from timer interrupt x86: Simplify timer_ack magic in time_32.c x86: Prepare unification of time_32/64.c x86: Remove do_timer hook x86: Add timer_init to x86_init_ops x86: Move percpu clockevents setup to x86_init_ops x86: Move xen_post_allocator_init into xen_pagetable_setup_done ... Fix up conflicts in arch/x86/include/asm/io_apic.h
Diffstat (limited to 'arch/x86/kernel/time_32.c')
-rw-r--r--arch/x86/kernel/time_32.c137
1 files changed, 0 insertions, 137 deletions
diff --git a/arch/x86/kernel/time_32.c b/arch/x86/kernel/time_32.c
deleted file mode 100644
index 5c5d87f0b2e1..000000000000
--- a/arch/x86/kernel/time_32.c
+++ /dev/null
@@ -1,137 +0,0 @@
1/*
2 * Copyright (C) 1991, 1992, 1995 Linus Torvalds
3 *
4 * This file contains the PC-specific time handling details:
5 * reading the RTC at bootup, etc..
6 * 1994-07-02 Alan Modra
7 * fixed set_rtc_mmss, fixed time.year for >= 2000, new mktime
8 * 1995-03-26 Markus Kuhn
9 * fixed 500 ms bug at call to set_rtc_mmss, fixed DS12887
10 * precision CMOS clock update
11 * 1996-05-03 Ingo Molnar
12 * fixed time warps in do_[slow|fast]_gettimeoffset()
13 * 1997-09-10 Updated NTP code according to technical memorandum Jan '96
14 * "A Kernel Model for Precision Timekeeping" by Dave Mills
15 * 1998-09-05 (Various)
16 * More robust do_fast_gettimeoffset() algorithm implemented
17 * (works with APM, Cyrix 6x86MX and Centaur C6),
18 * monotonic gettimeofday() with fast_get_timeoffset(),
19 * drift-proof precision TSC calibration on boot
20 * (C. Scott Ananian <cananian@alumni.princeton.edu>, Andrew D.
21 * Balsa <andrebalsa@altern.org>, Philip Gladstone <philip@raptor.com>;
22 * ported from 2.0.35 Jumbo-9 by Michael Krause <m.krause@tu-harburg.de>).
23 * 1998-12-16 Andrea Arcangeli
24 * Fixed Jumbo-9 code in 2.1.131: do_gettimeofday was missing 1 jiffy
25 * because was not accounting lost_ticks.
26 * 1998-12-24 Copyright (C) 1998 Andrea Arcangeli
27 * Fixed a xtime SMP race (we need the xtime_lock rw spinlock to
28 * serialize accesses to xtime/lost_ticks).
29 */
30
31#include <linux/init.h>
32#include <linux/interrupt.h>
33#include <linux/time.h>
34#include <linux/mca.h>
35
36#include <asm/setup.h>
37#include <asm/hpet.h>
38#include <asm/time.h>
39#include <asm/timer.h>
40
41#include <asm/do_timer.h>
42
43int timer_ack;
44
45unsigned long profile_pc(struct pt_regs *regs)
46{
47 unsigned long pc = instruction_pointer(regs);
48
49#ifdef CONFIG_SMP
50 if (!user_mode_vm(regs) && in_lock_functions(pc)) {
51#ifdef CONFIG_FRAME_POINTER
52 return *(unsigned long *)(regs->bp + sizeof(long));
53#else
54 unsigned long *sp = (unsigned long *)&regs->sp;
55
56 /* Return address is either directly at stack pointer
57 or above a saved flags. Eflags has bits 22-31 zero,
58 kernel addresses don't. */
59 if (sp[0] >> 22)
60 return sp[0];
61 if (sp[1] >> 22)
62 return sp[1];
63#endif
64 }
65#endif
66 return pc;
67}
68EXPORT_SYMBOL(profile_pc);
69
70/*
71 * This is the same as the above, except we _also_ save the current
72 * Time Stamp Counter value at the time of the timer interrupt, so that
73 * we later on can estimate the time of day more exactly.
74 */
75irqreturn_t timer_interrupt(int irq, void *dev_id)
76{
77 /* Keep nmi watchdog up to date */
78 inc_irq_stat(irq0_irqs);
79
80#ifdef CONFIG_X86_IO_APIC
81 if (timer_ack) {
82 /*
83 * Subtle, when I/O APICs are used we have to ack timer IRQ
84 * manually to deassert NMI lines for the watchdog if run
85 * on an 82489DX-based system.
86 */
87 spin_lock(&i8259A_lock);
88 outb(0x0c, PIC_MASTER_OCW3);
89 /* Ack the IRQ; AEOI will end it automatically. */
90 inb(PIC_MASTER_POLL);
91 spin_unlock(&i8259A_lock);
92 }
93#endif
94
95 do_timer_interrupt_hook();
96
97#ifdef CONFIG_MCA
98 if (MCA_bus) {
99 /* The PS/2 uses level-triggered interrupts. You can't
100 turn them off, nor would you want to (any attempt to
101 enable edge-triggered interrupts usually gets intercepted by a
102 special hardware circuit). Hence we have to acknowledge
103 the timer interrupt. Through some incredibly stupid
104 design idea, the reset for IRQ 0 is done by setting the
105 high bit of the PPI port B (0x61). Note that some PS/2s,
106 notably the 55SX, work fine if this is removed. */
107
108 u8 irq_v = inb_p(0x61); /* read the current state */
109 outb_p(irq_v | 0x80, 0x61); /* reset the IRQ */
110 }
111#endif
112
113 return IRQ_HANDLED;
114}
115
116/* Duplicate of time_init() below, with hpet_enable part added */
117void __init hpet_time_init(void)
118{
119 if (!hpet_enable())
120 setup_pit_timer();
121 x86_quirk_time_init();
122}
123
124/*
125 * This is called directly from init code; we must delay timer setup in the
126 * HPET case as we can't make the decision to turn on HPET this early in the
127 * boot process.
128 *
129 * The chosen time_init function will usually be hpet_time_init, above, but
130 * in the case of virtual hardware, an alternative function may be substituted.
131 */
132void __init time_init(void)
133{
134 x86_quirk_pre_time_init();
135 tsc_init();
136 late_time_init = choose_time_init();
137}