include/asm-sh/hardirq.h

   1 #ifndef __ASM_SH_HARDIRQ_H
   2 #define __ASM_SH_HARDIRQ_H
   3
   4 #include <linux/config.h>
   5 #include <linux/threads.h>
   6 #include <linux/irq.h>
   7
   8 /* entry.S is sensitive to the offsets of these fields */
   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 #define HARDIRQ_BITS    8
  16
  17 /*
  18  * The hardirq mask has to be large enough to have
  19  * space for potentially all IRQ sources in the system
  20  * nesting on a single CPU:
  21  */
  22 #if (1 << HARDIRQ_BITS) < NR_IRQS
  23 # error HARDIRQ_BITS is too low!
  24 #endif
  25
  26 #define nmi_enter()             (irq_enter())
  27 #define nmi_exit()              (preempt_count() -= HARDIRQ_OFFSET)
  28
  29 #define irq_enter()             (preempt_count() += HARDIRQ_OFFSET)
  30 #define irq_exit()                                                      \
  31 do {                                                                    \
  32                 preempt_count() -= IRQ_EXIT_OFFSET;                     \
  33                 if (!in_interrupt() && softirq_pending(smp_processor_id())) \
  34                         do_softirq();                                   \
  35                 preempt_enable_no_resched();                            \
  36 } while (0)
  37
  38 #endif /* __ASM_SH_HARDIRQ_H */