include/asm-m68knommu/irq.h

   1 #ifndef _M68K_IRQ_H_
   2 #define _M68K_IRQ_H_
   3
   4 #include <linux/config.h>
   5 #include <asm/ptrace.h>
   6
   7 #ifdef CONFIG_COLDFIRE
   8 /*
   9  * On the ColdFire we keep track of all vectors. That way drivers
  10  * can register whatever vector number they wish, and we can deal
  11  * with it.
  12  */
  13 #define SYS_IRQS        256
  14 #define NR_IRQS         SYS_IRQS
  15
  16 #else
  17
  18 /*
  19  * # of m68k interrupts
  20  */
  21 #define SYS_IRQS 8
  22 #define NR_IRQS (24+SYS_IRQS)
  23
  24 #endif /* CONFIG_COLDFIRE */
  25
  26 /*
  27  * Interrupt source definitions
  28  * General interrupt sources are the level 1-7.
  29  * Adding an interrupt service routine for one of these sources
  30  * results in the addition of that routine to a chain of routines.
  31  * Each one is called in succession.  Each individual interrupt
  32  * service routine should determine if the device associated with
  33  * that routine requires service.
  34  */
  35
  36 #define IRQ1            (1)     /* level 1 interrupt */
  37 #define IRQ2            (2)     /* level 2 interrupt */
  38 #define IRQ3            (3)     /* level 3 interrupt */
  39 #define IRQ4            (4)     /* level 4 interrupt */
  40 #define IRQ5            (5)     /* level 5 interrupt */
  41 #define IRQ6            (6)     /* level 6 interrupt */
  42 #define IRQ7            (7)     /* level 7 interrupt (non-maskable) */
  43
  44 /*
  45  * Machine specific interrupt sources.
  46  *
  47  * Adding an interrupt service routine for a source with this bit
  48  * set indicates a special machine specific interrupt source.
  49  * The machine specific files define these sources.
  50  *
  51  * The IRQ_MACHSPEC bit is now gone - the only thing it did was to
  52  * introduce unnecessary overhead.
  53  *
  54  * All interrupt handling is actually machine specific so it is better
  55  * to use function pointers, as used by the Sparc port, and select the
  56  * interrupt handling functions when initializing the kernel. This way
  57  * we save some unnecessary overhead at run-time.
  58  *                                                      01/11/97 - Jes
  59  */
  60
  61 extern void (*mach_enable_irq)(unsigned int);
  62 extern void (*mach_disable_irq)(unsigned int);
  63
  64 /*
  65  * various flags for request_irq() - the Amiga now uses the standard
  66  * mechanism like all other architectures - SA_INTERRUPT and SA_SHIRQ
  67  * are your friends.
  68  */
  69 #define IRQ_FLG_LOCK    (0x0001)        /* handler is not replaceable   */
  70 #define IRQ_FLG_REPLACE (0x0002)        /* replace existing handler     */
  71 #define IRQ_FLG_FAST    (0x0004)
  72 #define IRQ_FLG_SLOW    (0x0008)
  73 #define IRQ_FLG_STD     (0x8000)        /* internally used              */
  74
  75 #ifdef CONFIG_M68360
  76
  77 #define CPM_INTERRUPT    IRQ4
  78
  79 /* see MC68360 User's Manual, p. 7-377  */
  80 #define CPM_VECTOR_BASE  0x04           /* 3 MSbits of CPM vector */
  81
  82 #endif /* CONFIG_M68360 */
  83
  84 /*
  85  * Some drivers want these entry points
  86  */
  87 #define enable_irq(x)   (mach_enable_irq  ? (*mach_enable_irq)(x)  : 0)
  88 #define disable_irq(x)  (mach_disable_irq ? (*mach_disable_irq)(x) : 0)
  89
  90 #define enable_irq_nosync(x)    enable_irq(x)
  91 #define disable_irq_nosync(x)   disable_irq(x)
  92
  93 struct irqaction;
  94 struct pt_regs;
  95 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
  96
  97 #endif /* _M68K_IRQ_H_ */