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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#define local_softirq_pending() read_pda(__softirq_pending)
13
14#define __ARCH_SET_SOFTIRQ_PENDING 1
15
16#define set_softirq_pending(x) write_pda(__softirq_pending, (x))
17#define or_softirq_pending(x) or_pda(__softirq_pending, (x))
18
19/*
20 * 'what should we do if we get a hw irq event on an illegal vector'.
21 * each architecture has to answer this themselves.
22 */
23static inline void ack_bad_irq(unsigned int irq)
24{
25 printk("unexpected IRQ trap at vector %02x\n", irq);
26#ifdef CONFIG_X86_LOCAL_APIC
27 /*
28 * Currently unexpected vectors happen only on SMP and APIC.
29 * We _must_ ack these because every local APIC has only N
30 * irq slots per priority level, and a 'hanging, unacked' IRQ
31 * holds up an irq slot - in excessive cases (when multiple
32 * unexpected vectors occur) that might lock up the APIC
33 * completely.
34 */
35 ack_APIC_irq();
36#endif
37}
38#endif /* __ASM_HARDIRQ_H */