LXR linux/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
  26extern int nr_irqs;
  27extern struct irq_desc *irq_to_desc(unsigned int irq);
  28
  29# define for_each_irq_desc(irq, desc)                                   \
  30        for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs;           \
  31             irq++, desc = irq_to_desc(irq))                            \
  32                if (!desc)                                              \
  33                        ;                                               \
  34                else
  35
  36
  37# define for_each_irq_desc_reverse(irq, desc)                           \
  38        for (irq = nr_irqs - 1, desc = irq_to_desc(irq); irq >= 0;      \
  39             irq--, desc = irq_to_desc(irq))                            \
  40                if (!desc)                                              \
  41                        ;                                               \
  42                else
  43
  44#ifdef CONFIG_SMP
  45#define irq_node(irq)   (irq_to_desc(irq)->node)
  46#else
  47#define irq_node(irq)   0
  48#endif
  49
  50#endif /* CONFIG_GENERIC_HARDIRQS */
  51
  52#define for_each_irq_nr(irq)                   \
  53       for (irq = 0; irq < nr_irqs; irq++)
  54
  55#endif /* __KERNEL__ */
  56
  57#endif
  58