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Directory :  /usr/src/linux-headers-3.13.0-170/arch/x86/include/asm/

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Current File : /usr/src/linux-headers-3.13.0-170/arch/x86/include/asm/smpboot_hooks.h
/* two abstractions specific to kernel/smpboot.c, mainly to cater to visws
 * which needs to alter them. */

static inline void smpboot_clear_io_apic_irqs(void)
{
#ifdef CONFIG_X86_IO_APIC
	io_apic_irqs = 0;
#endif
}

static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
{
	unsigned long flags;

	spin_lock_irqsave(&rtc_lock, flags);
	CMOS_WRITE(0xa, 0xf);
	spin_unlock_irqrestore(&rtc_lock, flags);
	local_flush_tlb();
	pr_debug("1.\n");
	*((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_high)) =
								 start_eip >> 4;
	pr_debug("2.\n");
	*((volatile unsigned short *)phys_to_virt(apic->trampoline_phys_low)) =
							 start_eip & 0xf;
	pr_debug("3.\n");
}

static inline void smpboot_restore_warm_reset_vector(void)
{
	unsigned long flags;

	/*
	 * Install writable page 0 entry to set BIOS data area.
	 */
	local_flush_tlb();

	/*
	 * Paranoid:  Set warm reset code and vector here back
	 * to default values.
	 */
	spin_lock_irqsave(&rtc_lock, flags);
	CMOS_WRITE(0, 0xf);
	spin_unlock_irqrestore(&rtc_lock, flags);

	*((volatile u32 *)phys_to_virt(apic->trampoline_phys_low)) = 0;
}

static inline void __init smpboot_setup_io_apic(void)
{
#ifdef CONFIG_X86_IO_APIC
	/*
	 * Here we can be sure that there is an IO-APIC in the system. Let's
	 * go and set it up:
	 */
	if (!skip_ioapic_setup && nr_ioapics)
		setup_IO_APIC();
	else {
		nr_ioapics = 0;
	}
#endif
}

static inline void smpboot_clear_io_apic(void)
{
#ifdef CONFIG_X86_IO_APIC
	nr_ioapics = 0;
#endif
}

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