683b6c6f82
Pull irq code updates from Thomas Gleixner:
"The irq department proudly presents:
- Another tree wide sweep of irq infrastructure abuse. Clear winner
of the trainwreck engineering contest was:
#include "../../../kernel/irq/settings.h"
- Tree wide update of irq_set_affinity() callbacks which miss a cpu
online check when picking a single cpu out of the affinity mask.
- Tree wide consolidation of interrupt statistics.
- Updates to the threaded interrupt infrastructure to allow explicit
wakeup of the interrupt thread and a variant of synchronize_irq()
which synchronizes only the hard interrupt handler. Both are
needed to replace the homebrewn thread handling in the mmc/sdhci
code.
- New irq chip callbacks to allow proper support for GPIO based irqs.
The GPIO based interrupts need to request/release GPIO resources
from request/free_irq.
- A few new ARM interrupt chips. No revolutionary new hardware, just
differently wreckaged variations of the scheme.
- Small improvments, cleanups and updates all over the place"
I was hoping that that trainwreck engineering contest was a April Fools'
joke. But no.
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (68 commits)
irqchip: sun7i/sun6i: Disable NMI before registering the handler
ARM: sun7i/sun6i: dts: Fix IRQ number for sun6i NMI controller
ARM: sun7i/sun6i: irqchip: Update the documentation
ARM: sun7i/sun6i: dts: Add NMI irqchip support
ARM: sun7i/sun6i: irqchip: Add irqchip driver for NMI controller
genirq: Export symbol no_action()
arm: omap: Fix typo in ams-delta-fiq.c
m68k: atari: Fix the last kernel_stat.h fallout
irqchip: sun4i: Simplify sun4i_irq_ack
irqchip: sun4i: Use handle_fasteoi_irq for all interrupts
genirq: procfs: Make smp_affinity values go+r
softirq: Add linux/irq.h to make it compile again
m68k: amiga: Add linux/irq.h to make it compile again
irqchip: sun4i: Don't ack IRQs > 0, fix acking of IRQ 0
irqchip: sun4i: Fix a comment about mask register initialization
irqchip: sun4i: Fix irq 0 not working
genirq: Add a new IRQCHIP_EOI_THREADED flag
genirq: Document IRQCHIP_ONESHOT_SAFE flag
ARM: sunxi: dt: Convert to the new irq controller compatibles
irqchip: sunxi: Change compatibles
...
96 lines
2 KiB
C
96 lines
2 KiB
C
/*
|
|
* Copyright (c) 1991,1992,1995 Linus Torvalds
|
|
* Copyright (c) 1994 Alan Modra
|
|
* Copyright (c) 1995 Markus Kuhn
|
|
* Copyright (c) 1996 Ingo Molnar
|
|
* Copyright (c) 1998 Andrea Arcangeli
|
|
* Copyright (c) 2002,2006 Vojtech Pavlik
|
|
* Copyright (c) 2003 Andi Kleen
|
|
*
|
|
*/
|
|
|
|
#include <linux/clockchips.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/i8253.h>
|
|
#include <linux/time.h>
|
|
#include <linux/export.h>
|
|
|
|
#include <asm/vsyscall.h>
|
|
#include <asm/x86_init.h>
|
|
#include <asm/i8259.h>
|
|
#include <asm/timer.h>
|
|
#include <asm/hpet.h>
|
|
#include <asm/time.h>
|
|
|
|
#ifdef CONFIG_X86_64
|
|
__visible DEFINE_VVAR(volatile unsigned long, jiffies) = INITIAL_JIFFIES;
|
|
#endif
|
|
|
|
unsigned long profile_pc(struct pt_regs *regs)
|
|
{
|
|
unsigned long pc = instruction_pointer(regs);
|
|
|
|
if (!user_mode_vm(regs) && in_lock_functions(pc)) {
|
|
#ifdef CONFIG_FRAME_POINTER
|
|
return *(unsigned long *)(regs->bp + sizeof(long));
|
|
#else
|
|
unsigned long *sp =
|
|
(unsigned long *)kernel_stack_pointer(regs);
|
|
/*
|
|
* Return address is either directly at stack pointer
|
|
* or above a saved flags. Eflags has bits 22-31 zero,
|
|
* kernel addresses don't.
|
|
*/
|
|
if (sp[0] >> 22)
|
|
return sp[0];
|
|
if (sp[1] >> 22)
|
|
return sp[1];
|
|
#endif
|
|
}
|
|
return pc;
|
|
}
|
|
EXPORT_SYMBOL(profile_pc);
|
|
|
|
/*
|
|
* Default timer interrupt handler for PIT/HPET
|
|
*/
|
|
static irqreturn_t timer_interrupt(int irq, void *dev_id)
|
|
{
|
|
global_clock_event->event_handler(global_clock_event);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static struct irqaction irq0 = {
|
|
.handler = timer_interrupt,
|
|
.flags = IRQF_NOBALANCING | IRQF_IRQPOLL | IRQF_TIMER,
|
|
.name = "timer"
|
|
};
|
|
|
|
void __init setup_default_timer_irq(void)
|
|
{
|
|
setup_irq(0, &irq0);
|
|
}
|
|
|
|
/* Default timer init function */
|
|
void __init hpet_time_init(void)
|
|
{
|
|
if (!hpet_enable())
|
|
setup_pit_timer();
|
|
setup_default_timer_irq();
|
|
}
|
|
|
|
static __init void x86_late_time_init(void)
|
|
{
|
|
x86_init.timers.timer_init();
|
|
tsc_init();
|
|
}
|
|
|
|
/*
|
|
* Initialize TSC and delay the periodic timer init to
|
|
* late x86_late_time_init() so ioremap works.
|
|
*/
|
|
void __init time_init(void)
|
|
{
|
|
late_time_init = x86_late_time_init;
|
|
}
|