include/asm-m68knommu/irq.h

   1 #ifndef _M68K_IRQ_H_
   2 #define _M68K_IRQ_H_
   3
   4 #include <asm/ptrace.h>
   5
   6 #ifdef CONFIG_COLDFIRE
   7 /*
   8  * On the ColdFire we keep track of all vectors. That way drivers
   9  * can register whatever vector number they wish, and we can deal
  10  * with it.
  11  */
  12 #define SYS_IRQS        256
  13 #define NR_IRQS         SYS_IRQS
  14
  15 #else
  16
  17 /*
  18  * # of m68k interrupts
  19  */
  20 #define SYS_IRQS 8
  21 #define NR_IRQS (24+SYS_IRQS)
  22
  23 #endif /* CONFIG_COLDFIRE */
  24
  25 /*
  26  * Interrupt source definitions
  27  * General interrupt sources are the level 1-7.
  28  * Adding an interrupt service routine for one of these sources
  29  * results in the addition of that routine to a chain of routines.
  30  * Each one is called in succession.  Each individual interrupt
  31  * service routine should determine if the device associated with
  32  * that routine requires service.
  33  */
  34
  35 #define IRQ1            (1)     /* level 1 interrupt */
  36 #define IRQ2            (2)     /* level 2 interrupt */
  37 #define IRQ3            (3)     /* level 3 interrupt */
  38 #define IRQ4            (4)     /* level 4 interrupt */
  39 #define IRQ5            (5)     /* level 5 interrupt */
  40 #define IRQ6            (6)     /* level 6 interrupt */
  41 #define IRQ7            (7)     /* level 7 interrupt (non-maskable) */
  42
  43 /*
  44  * Machine specific interrupt sources.
  45  *
  46  * Adding an interrupt service routine for a source with this bit
  47  * set indicates a special machine specific interrupt source.
  48  * The machine specific files define these sources.
  49  *
  50  * The IRQ_MACHSPEC bit is now gone - the only thing it did was to
  51  * introduce unnecessary overhead.
  52  *
  53  * All interrupt handling is actually machine specific so it is better
  54  * to use function pointers, as used by the Sparc port, and select the
  55  * interrupt handling functions when initializing the kernel. This way
  56  * we save some unnecessary overhead at run-time.
  57  *                                                      01/11/97 - Jes
  58  */
  59
  60 extern void (*mach_enable_irq)(unsigned int);
  61 extern void (*mach_disable_irq)(unsigned int);
  62
  63 /*
  64  * various flags for request_irq() - the Amiga now uses the standard
  65  * mechanism like all other architectures - IRQF_DISABLED and
  66  * IRQF_SHARED are your friends.
  67  */
  68 #define IRQ_FLG_LOCK    (0x0001)        /* handler is not replaceable   */
  69 #define IRQ_FLG_REPLACE (0x0002)        /* replace existing handler     */
  70 #define IRQ_FLG_FAST    (0x0004)
  71 #define IRQ_FLG_SLOW    (0x0008)
  72 #define IRQ_FLG_STD     (0x8000)        /* internally used              */
  73
  74 #ifdef CONFIG_M68360
  75
  76 #define CPM_INTERRUPT    IRQ4
  77
  78 /* see MC68360 User's Manual, p. 7-377  */
  79 #define CPM_VECTOR_BASE  0x04           /* 3 MSbits of CPM vector */
  80
  81 #endif /* CONFIG_M68360 */
  82
  83 /*
  84  * Some drivers want these entry points
  85  */
  86 #define enable_irq(x)   do { } while (0)
  87 #define disable_irq(x)  do { } while (0)
  88 #define disable_irq_nosync(x)   disable_irq(x)
  89 #define irq_canonicalize(irq)   (irq)
  90
  91 #endif /* _M68K_IRQ_H_ */