diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-18 17:05:47 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-18 17:05:47 -0400 |
commit | 78f28b7c555359c67c2a0d23f7436e915329421e (patch) | |
tree | 7f8197f82f83c0c19fd9bc85b5d10b5a755d0656 /arch/x86/kernel/time_32.c | |
parent | 3240a77b515f4a15e24d8a3a2135bc87b02cf1d6 (diff) | |
parent | 7bd867dfb4e0357e06a3211ab2bd0e714110def3 (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.c | 137 |
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 | |||
43 | int timer_ack; | ||
44 | |||
45 | unsigned 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 *)®s->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 | } | ||
68 | EXPORT_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 | */ | ||
75 | irqreturn_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 */ | ||
117 | void __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 | */ | ||
132 | void __init time_init(void) | ||
133 | { | ||
134 | x86_quirk_pre_time_init(); | ||
135 | tsc_init(); | ||
136 | late_time_init = choose_time_init(); | ||
137 | } | ||