[mirror_ubuntu-zesty-kernel.git] / include / asm-x86_64 / hardirq.h

#ifndef __ASM_HARDIRQ_H
#define __ASM_HARDIRQ_H

#include <linux/config.h>
#include <linux/threads.h>
#include <linux/irq.h>
#include <asm/pda.h>
#include <asm/apic.h>

#define __ARCH_IRQ_STAT 1

/* Generate a lvalue for a pda member. Should fix softirq.c instead to use
   special access macros. This would generate better code. */ 
#define __IRQ_STAT(cpu,member) (read_pda(me)->member)

#include <linux/irq_cpustat.h>	/* Standard mappings for irq_cpustat_t above */

/*
 * 'what should we do if we get a hw irq event on an illegal vector'.
 * each architecture has to answer this themselves.
 */
static inline void ack_bad_irq(unsigned int irq)
{
	printk("unexpected IRQ trap at vector %02x\n", irq);
#ifdef CONFIG_X86_LOCAL_APIC
	/*
	 * Currently unexpected vectors happen only on SMP and APIC.
	 * We _must_ ack these because every local APIC has only N
	 * irq slots per priority level, and a 'hanging, unacked' IRQ
	 * holds up an irq slot - in excessive cases (when multiple
	 * unexpected vectors occur) that might lock up the APIC
	 * completely.
	 */
	ack_APIC_irq();
#endif
}
#endif /* __ASM_HARDIRQ_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef __ASM_HARDIRQ_H
	2	#define __ASM_HARDIRQ_H
	3
	4	#include <linux/config.h>
	5	#include <linux/threads.h>
	6	#include <linux/irq.h>
	7	#include <asm/pda.h>
	8	#include <asm/apic.h>
	9
	10	#define __ARCH_IRQ_STAT 1
	11
	12	/* Generate a lvalue for a pda member. Should fix softirq.c instead to use
	13	special access macros. This would generate better code. */
	14	#define __IRQ_STAT(cpu,member) (read_pda(me)->member)
	15
	16	#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
	17
	18	/*
	19	* 'what should we do if we get a hw irq event on an illegal vector'.
	20	* each architecture has to answer this themselves.
	21	*/
	22	static inline void ack_bad_irq(unsigned int irq)
	23	{
	24	printk("unexpected IRQ trap at vector %02x\n", irq);
	25	#ifdef CONFIG_X86_LOCAL_APIC
	26	/*
	27	* Currently unexpected vectors happen only on SMP and APIC.
	28	* We _must_ ack these because every local APIC has only N
	29	* irq slots per priority level, and a 'hanging, unacked' IRQ
	30	* holds up an irq slot - in excessive cases (when multiple
	31	* unexpected vectors occur) that might lock up the APIC
	32	* completely.
	33	*/
	34	ack_APIC_irq();
	35	#endif
	36	}
	37	#endif /* __ASM_HARDIRQ_H */