release/src-rt-6.x/linux/linux-2.6/include/asm-alpha/hardirq.h

   1 #ifndef _ALPHA_HARDIRQ_H
   2 #define _ALPHA_HARDIRQ_H
   3
   4 #include <linux/threads.h>
   5 #include <linux/cache.h>
   6
   7
   8 /* entry.S is sensitive to the offsets of these fields */
   9 typedef struct {
  10         unsigned long __softirq_pending;
  11 } ____cacheline_aligned irq_cpustat_t;
  12
  13 #include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
  14
  15 void ack_bad_irq(unsigned int irq);
  16
  17 #define HARDIRQ_BITS    12
  18
  19 /*
  20  * The hardirq mask has to be large enough to have
  21  * space for potentially nestable IRQ sources in the system
  22  * to nest on a single CPU. On Alpha, interrupts are masked at the CPU
  23  * by IPL as well as at the system level. We only have 8 IPLs (UNIX PALcode)
  24  * so we really only have 8 nestable IRQs, but allow some overhead
  25  */
  26 #if (1 << HARDIRQ_BITS) < 16
  27 #error HARDIRQ_BITS is too low!
  28 #endif
  29
  30 #endif /* _ALPHA_HARDIRQ_H */