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Open Menu / include / asm-alpha / irq.h
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#ifndef _ALPHA_IRQ_H
#define _ALPHA_IRQ_H

/*
 *	linux/include/alpha/irq.h
 *
 *	(C) 1994 Linus Torvalds
 */

#include <linux/linkage.h>
#include <linux/config.h>

#if   defined(CONFIG_ALPHA_GENERIC)

/* Here NR_IRQS is not exact, but rather an upper bound.  This is used
   many places throughout the kernel to size static arrays.  That's ok,
   we'll use alpha_mv.nr_irqs when we want the real thing.  */

# define NR_IRQS	64

#elif defined(CONFIG_ALPHA_CABRIOLET) || \
      defined(CONFIG_ALPHA_EB66P)     || \
      defined(CONFIG_ALPHA_EB164)     || \
      defined(CONFIG_ALPHA_PC164)     || \
      defined(CONFIG_ALPHA_LX164)
# define NR_IRQS	35

#elif defined(CONFIG_ALPHA_EB66)      || \
      defined(CONFIG_ALPHA_EB64P)     || \
      defined(CONFIG_ALPHA_MIKASA)
# define NR_IRQS	32

#elif defined(CONFIG_ALPHA_ALCOR)     || \
      defined(CONFIG_ALPHA_XLT)       || \
      defined(CONFIG_ALPHA_MIATA)     || \
      defined(CONFIG_ALPHA_RUFFIAN)   || \
      defined(CONFIG_ALPHA_NORITAKE)
# define NR_IRQS	48

#elif defined(CONFIG_ALPHA_SABLE)     || \
      defined(CONFIG_ALPHA_SX164)
# define NR_IRQS	40

#elif defined(CONFIG_ALPHA_DP264) || \
      defined(CONFIG_ALPHA_RAWHIDE)
# define NR_IRQS	64

#elif defined(CONFIG_ALPHA_TAKARA)
# define NR_IRQS	20

#else /* everyone else */
# define NR_IRQS	16
#endif

/*
 * PROBE_MASK is the bitset of irqs that we consider for autoprobing.
 */

/* The normal mask includes all the IRQs except the timer.  */
#define _PROBE_MASK(nr_irqs)	(((1UL << (nr_irqs & 63)) - 1) & ~1UL)

/* Mask out unused timer irq 0 and RTC irq 8. */
#define P2K_PROBE_MASK		(_PROBE_MASK(16) & ~0x101UL)

/* Mask out unused timer irq 0, "irqs" 20-30, and the EISA cascade. */
#define ALCOR_PROBE_MASK	(_PROBE_MASK(48) & ~0xfff000000001UL)

/* Leave timer irq 0 in the mask.  */
#define RUFFIAN_PROBE_MASK	(_PROBE_MASK(48) | 1UL)

#if defined(CONFIG_ALPHA_GENERIC)
# define PROBE_MASK	alpha_mv.irq_probe_mask
#elif defined(CONFIG_ALPHA_P2K)
# define PROBE_MASK	P2K_PROBE_MASK
#elif defined(CONFIG_ALPHA_ALCOR) || defined(CONFIG_ALPHA_XLT)
# define PROBE_MASK	ALCOR_PROBE_MASK
#elif defined(CONFIG_ALPHA_RUFFIAN)
# define PROBE_MASK	RUFFIAN_PROBE_MASK
#else
# define PROBE_MASK	_PROBE_MASK(NR_IRQS)
#endif


static __inline__ int irq_cannonicalize(int irq)
{
	/*
	 * XXX is this true for all Alpha's?  The old serial driver
	 * did it this way for years without any complaints, so....
	 */
	return ((irq == 2) ? 9 : irq);
}

extern void disable_irq(unsigned int);
extern void enable_irq(unsigned int);

#endif /* _ALPHA_IRQ_H */