include/asm-arm/hardirq.h

   1 #ifndef __ASM_HARDIRQ_H
   2 #define __ASM_HARDIRQ_H
   3
   4 #include <linux/config.h>
   5 #include <linux/cache.h>
   6 #include <linux/threads.h>
   7 #include <asm/irq.h>
   8
   9 typedef struct {
  10         unsigned int __softirq_pending;
  11 } ____cacheline_aligned irq_cpustat_t;
  12
  13 #include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
  14
  15 #if NR_IRQS > 256
  16 #define HARDIRQ_BITS    9
  17 #else
  18 #define HARDIRQ_BITS    8
  19 #endif
  20
  21 /*
  22  * The hardirq mask has to be large enough to have space
  23  * for potentially all IRQ sources in the system nesting
  24  * on a single CPU:
  25  */
  26 #if (1 << HARDIRQ_BITS) < NR_IRQS
  27 # error HARDIRQ_BITS is too low!
  28 #endif
  29
  30 #define irq_enter()             (preempt_count() += HARDIRQ_OFFSET)
  31
  32 extern asmlinkage void __do_softirq(void);
  33
  34 #define irq_exit()                                                      \
  35         do {                                                            \
  36                 preempt_count() -= IRQ_EXIT_OFFSET;                     \
  37                 if (!in_interrupt() && local_softirq_pending())         \
  38                         __do_softirq();                                 \
  39                 preempt_enable_no_resched();                            \
  40         } while (0)
  41
  42 #endif /* __ASM_HARDIRQ_H */