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         unsigned int __local_irq_count;
  11         unsigned int __local_bh_count;
  12         unsigned int __syscall_count;
  13         struct task_struct * __ksoftirqd_task; /* waitqueue is too large */
  14 } ____cacheline_aligned irq_cpustat_t;
  15
  16 #include <linux/irq_cpustat.h>  /* Standard mappings for irq_cpustat_t above */
  17
  18 #define HARDIRQ_BITS    8
  19
  20 /*
  21  * The hardirq mask has to be large enough to have space
  22  * for potentially all IRQ sources in the system nesting
  23  * on a single CPU:
  24  */
  25 #if (1 << HARDIRQ_BITS) < NR_IRQS
  26 # error HARDIRQ_BITS is too low!
  27 #endif
  28
  29 #define irq_enter()             (preempt_count() += HARDIRQ_OFFSET)
  30
  31 #ifndef CONFIG_SMP
  32 #define irq_exit()                                                      \
  33         do {                                                            \
  34                 preempt_count() -= HARDIRQ_OFFSET;                      \
  35                 if (!in_interrupt() && softirq_pending(smp_processor_id())) \
  36                         __asm__("bl%? __do_softirq": : : "lr");/* out of line */\
  37                 preempt_enable_no_resched();                            \
  38         } while (0)
  39
  40 #endif
  41
  42 #endif /* __ASM_HARDIRQ_H */