include/linux/irqnr.h

   1 #ifndef _LINUX_IRQNR_H
   2 #define _LINUX_IRQNR_H
   3
   4 /*
   5  * Generic irq_desc iterators:
   6  */
   7 #ifdef __KERNEL__
   8
   9 #ifndef CONFIG_GENERIC_HARDIRQS
  10 #include <asm/irq.h>
  11
  12 /*
  13  * Wrappers for non-genirq architectures:
  14  */
  15 #define nr_irqs                 NR_IRQS
  16 #define irq_to_desc(irq)        (&irq_desc[irq])
  17
  18 # define for_each_irq_desc(irq, desc)           \
  19         for (irq = 0; irq < nr_irqs; irq++)
  20
  21 # define for_each_irq_desc_reverse(irq, desc)                          \
  22         for (irq = nr_irqs - 1; irq >= 0; irq--)
  23
  24 #else /* CONFIG_GENERIC_HARDIRQS */
  25
  26 extern int nr_irqs;
  27 extern struct irq_desc *irq_to_desc(unsigned int irq);
  28 unsigned int irq_get_next_irq(unsigned int offset);
  29
  30 # define for_each_irq_desc(irq, desc)                                   \
  31         for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs;           \
  32              irq++, desc = irq_to_desc(irq))                            \
  33                 if (!desc)                                              \
  34                         ;                                               \
  35                 else
  36
  37
  38 # define for_each_irq_desc_reverse(irq, desc)                           \
  39         for (irq = nr_irqs - 1, desc = irq_to_desc(irq); irq >= 0;      \
  40              irq--, desc = irq_to_desc(irq))                            \
  41                 if (!desc)                                              \
  42                         ;                                               \
  43                 else
  44
  45 #ifdef CONFIG_SMP
  46 #define irq_node(irq)   (irq_get_irq_data(irq)->node)
  47 #else
  48 #define irq_node(irq)   0
  49 #endif
  50
  51 # define for_each_active_irq(irq)                       \
  52         for (irq = irq_get_next_irq(0); irq < nr_irqs;  \
  53              irq = irq_get_next_irq(irq + 1))
  54
  55 #endif /* CONFIG_GENERIC_HARDIRQS */
  56
  57 #define for_each_irq_nr(irq)                   \
  58        for (irq = 0; irq < nr_irqs; irq++)
  59
  60 #endif /* __KERNEL__ */
  61
  62 #endif