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Viewing changes to arch/powerpc/kernel/time.c

  • Committer: Bazaar Package Importer
  • Author(s): Paolo Pisati
  • Date: 2011-06-29 15:23:51 UTC
  • mfrom: (26.1.1 natty-proposed)
  • Revision ID: james.westby@ubuntu.com-20110629152351-xs96tm303d95rpbk
Tags: 3.0.0-1200.2
* Rebased against 3.0.0-6.7
* BSP from TI based on 3.0.0

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arch/powerpc/kernel/time.c
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#include <linux/irq.h>
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#include <linux/delay.h>
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#include <linux/irq_work.h>
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#include <trace/trap.h>
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#include <asm/trace.h>
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#include <asm/io.h>
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        struct clock_event_device *evt = &decrementer->event;
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        u64 now;
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        /* Ensure a positive value is written to the decrementer, or else
 
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         * some CPUs will continue to take decrementer exceptions.
 
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         */
 
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        set_dec(DECREMENTER_MAX);
 
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        /* Some implementations of hotplug will get timer interrupts while
 
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         * offline, just ignore these
 
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         */
 
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        if (!cpu_online(smp_processor_id()))
 
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                return;
 
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        trace_timer_interrupt_entry(regs);
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        __get_cpu_var(irq_stat).timer_irqs++;
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        /* Ensure a positive value is written to the decrementer, or else
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         * some CPUs will continuue to take decrementer exceptions */
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        set_dec(DECREMENTER_MAX);
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        trace_trap_entry(regs, regs->trap);
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#if defined(CONFIG_PPC32) && defined(CONFIG_PMAC)
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        if (atomic_read(&ppc_n_lost_interrupts) != 0)
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                do_IRQ(regs);
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        set_irq_regs(old_regs);
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        trace_timer_interrupt_exit(regs);
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        trace_trap_exit();
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}
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#ifdef CONFIG_SUSPEND