include/asm-alpha/irq.h

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 1 #ifndef _ALPHA_IRQ_H
 2 #define _ALPHA_IRQ_H
 3
 4 /*
 5  * linux/include/alpha/irq.h
 6  *
 7  * (C) 1994 Linus Torvalds
 8  */
 9
 10 #include <linux/linkage.h>
 11 #include <linux/config.h>
 12
 13 #if defined(CONFIG_ALPHA_GENERIC)
 14
 15 /* Here NR_IRQS is not exact, but rather an upper bound. This is used
 16  many places throughout the kernel to size static arrays. That's ok,
 17  we'll use alpha_mv.nr_irqs when we want the real thing. */
 18
 19 # define NR_IRQS 64
 20
 21 #elif defined(CONFIG_ALPHA_CABRIOLET) || \
 22  defined(CONFIG_ALPHA_EB66P) || \
 23  defined(CONFIG_ALPHA_EB164) || \
 24  defined(CONFIG_ALPHA_PC164) || \
 25  defined(CONFIG_ALPHA_LX164)
 26 # define NR_IRQS 35
 27
 28 #elif defined(CONFIG_ALPHA_EB66) || \
 29  defined(CONFIG_ALPHA_EB64P) || \
 30  defined(CONFIG_ALPHA_MIKASA)
 31 # define NR_IRQS 32
 32
 33 #elif defined(CONFIG_ALPHA_ALCOR) || \
 34  defined(CONFIG_ALPHA_XLT) || \
 35  defined(CONFIG_ALPHA_MIATA) || \
 36  defined(CONFIG_ALPHA_RUFFIAN) || \
 37  defined(CONFIG_ALPHA_RX164) || \
 38  defined(CONFIG_ALPHA_NORITAKE)
 39 # define NR_IRQS 48
 40
 41 #elif defined(CONFIG_ALPHA_SABLE) || \
 42  defined(CONFIG_ALPHA_SX164)
 43 # define NR_IRQS 40
 44
 45 #elif defined(CONFIG_ALPHA_DP264) || \
 46  defined(CONFIG_ALPHA_RAWHIDE)
 47 # define NR_IRQS 64
 48
 49 #elif defined(CONFIG_ALPHA_TAKARA)
 50 # define NR_IRQS 20
 51
 52 #else/* everyone else */
 53 # define NR_IRQS 16
 54 #endif
 55
 56 /*
 57  * PROBE_MASK is the bitset of irqs that we consider for autoprobing.
 58  */
 59
 60 /* The normal mask includes all the IRQs except the timer. */
 61 #define _PROBE_MASK(nr_irqs) (((1UL << (nr_irqs & 63)) - 1) & ~1UL)
 62
 63 /* Mask out unused timer irq 0 and RTC irq 8. */
 64 #define P2K_PROBE_MASK (_PROBE_MASK(16) & ~0x101UL)
 65
 66 /* Mask out unused timer irq 0, "irqs" 20-30, and the EISA cascade. */
 67 #define ALCOR_PROBE_MASK (_PROBE_MASK(48) & ~0xfff000000001UL)
 68
 69 /* Leave timer irq 0 in the mask. */
 70 #define RUFFIAN_PROBE_MASK (_PROBE_MASK(48) | 1UL)
 71
 72 #if defined(CONFIG_ALPHA_GENERIC)
 73 # define PROBE_MASK alpha_mv.irq_probe_mask
 74 #elif defined(CONFIG_ALPHA_P2K)
 75 # define PROBE_MASK P2K_PROBE_MASK
 76 #elif defined(CONFIG_ALPHA_ALCOR) || defined(CONFIG_ALPHA_XLT)
 77 # define PROBE_MASK ALCOR_PROBE_MASK
 78 #elif defined(CONFIG_ALPHA_RUFFIAN)
 79 # define PROBE_MASK RUFFIAN_PROBE_MASK
 80 #else
 81 # define PROBE_MASK _PROBE_MASK(NR_IRQS)
 82 #endif
 83
 84
 85 static __inline__ intirq_cannonicalize(int irq)
 86 {
 87 /*
 88  * XXX is this true for all Alpha's? The old serial driver
 89  * did it this way for years without any complaints, so....
 90  */
 91 return((irq ==2) ?9: irq);
 92 }
 93
 94 externvoiddisable_irq(unsigned int);
 95 externvoiddisable_irq_nosync(unsigned int);
 96 externvoidenable_irq(unsigned int);
 97
 98 externvoidirq_enter(int cpu,int irq);
 99 externvoidirq_exit(int cpu,int irq);
 100
 101 struct pt_regs;
 102 externvoid(*perf_irq)(unsigned long,struct pt_regs *);
 103
 104
 105 #endif/* _ALPHA_IRQ_H */