include/asm-arm26/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
   8 typedef struct {
   9         unsigned int __softirq_pending;
  10 } ____cacheline_aligned irq_cpustat_t;
  11
  12 #include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
  13
  14 #define HARDIRQ_BITS    8
  15
  16 /*
  17  * The hardirq mask has to be large enough to have space
  18  * for potentially all IRQ sources in the system nesting
  19  * on a single CPU:
  20  */
  21 #if (1 << HARDIRQ_BITS) < NR_IRQS
  22 # error HARDIRQ_BITS is too low!
  23 #endif
  24
  25 #define irq_enter()             (preempt_count() += HARDIRQ_OFFSET)
  26
  27 #ifndef CONFIG_SMP
  28
  29 extern asmlinkage void __do_softirq(void);
  30
  31 #define irq_exit()                                                      \
  32         do {                                                            \
  33                 preempt_count() -= IRQ_EXIT_OFFSET;                     \
  34                 if (!in_interrupt() && local_softirq_pending())         \
  35                         __do_softirq();                                 \
  36                 preempt_enable_no_resched();                            \
  37         } while (0)
  38 #endif
  39
  40
  41 #endif /* __ASM_HARDIRQ_H */