include/asm-x86_64/hardirq.h

   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 */