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Commit d94d93ca authored by Suresh Siddha's avatar Suresh Siddha Committed by Ingo Molnar
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x64, x2apic/intr-remap: 8259 specific mask/unmask routines 



8259 specific mask/unmask routines which be used later while enabling
interrupt-remapping.

Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Cc: akpm@linux-foundation.org
Cc: arjan@linux.intel.com
Cc: andi@firstfloor.org
Cc: ebiederm@xmission.com
Cc: jbarnes@virtuousgeek.org
Cc: steiner@sgi.com
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 72b1e22d

arch/x86/kernel/i8259.c

+24 −0
Original line number Diff line number Diff line
@@ -282,6 +282,30 @@ static int __init i8259A_init_sysfs(void) 


device_initcall(i8259A_init_sysfs);



void mask_8259A(void)

{

	unsigned long flags;



	spin_lock_irqsave(&i8259A_lock, flags);



	outb(0xff, PIC_MASTER_IMR);	/* mask all of 8259A-1 */

	outb(0xff, PIC_SLAVE_IMR);	/* mask all of 8259A-2 */



	spin_unlock_irqrestore(&i8259A_lock, flags);

}



void unmask_8259A(void)

{

	unsigned long flags;



	spin_lock_irqsave(&i8259A_lock, flags);



	outb(cached_master_mask, PIC_MASTER_IMR); /* restore master IRQ mask */

	outb(cached_slave_mask, PIC_SLAVE_IMR);	  /* restore slave IRQ mask */



	spin_unlock_irqrestore(&i8259A_lock, flags);

}



void init_8259A(int auto_eoi)

{

	unsigned long flags;

include/asm-x86/i8259.h

+3 −0
Original line number Diff line number Diff line
@@ -57,4 +57,7 @@ static inline void outb_pic(unsigned char value, unsigned int port) 


extern struct irq_chip i8259A_chip;



extern void mask_8259A(void);

extern void unmask_8259A(void);



#endif	/* __ASM_I8259_H__ */