arch/m68k/include/asm/irq.h

   1 #ifndef _M68K_IRQ_H_
   2 #define _M68K_IRQ_H_
   3
   4 /*
   5  * This should be the same as the max(NUM_X_SOURCES) for all the
   6  * different m68k hosts compiled into the kernel.
   7  * Currently the Atari has 72 and the Amiga 24, but if both are
   8  * supported in the kernel it is better to make room for 72.
   9  */
  10 #if defined(CONFIG_COLDFIRE)
  11 #define NR_IRQS 256
  12 #elif defined(CONFIG_VME) || defined(CONFIG_SUN3) || defined(CONFIG_SUN3X)
  13 #define NR_IRQS 200
  14 #elif defined(CONFIG_ATARI) || defined(CONFIG_MAC)
  15 #define NR_IRQS 72
  16 #elif defined(CONFIG_Q40)
  17 #define NR_IRQS 43
  18 #elif defined(CONFIG_AMIGA) || !defined(CONFIG_MMU)
  19 #define NR_IRQS 32
  20 #elif defined(CONFIG_APOLLO)
  21 #define NR_IRQS 24
  22 #elif defined(CONFIG_HP300)
  23 #define NR_IRQS 8
  24 #else
  25 #define NR_IRQS 0
  26 #endif
  27
  28 #ifdef CONFIG_MMU
  29
  30 #include <linux/linkage.h>
  31 #include <linux/hardirq.h>
  32 #include <linux/irqreturn.h>
  33 #include <linux/spinlock_types.h>
  34
  35 /*
  36  * Interrupt source definitions
  37  * General interrupt sources are the level 1-7.
  38  * Adding an interrupt service routine for one of these sources
  39  * results in the addition of that routine to a chain of routines.
  40  * Each one is called in succession.  Each individual interrupt
  41  * service routine should determine if the device associated with
  42  * that routine requires service.
  43  */
  44
  45 #define IRQ_SPURIOUS    0
  46
  47 #define IRQ_AUTO_1      1       /* level 1 interrupt */
  48 #define IRQ_AUTO_2      2       /* level 2 interrupt */
  49 #define IRQ_AUTO_3      3       /* level 3 interrupt */
  50 #define IRQ_AUTO_4      4       /* level 4 interrupt */
  51 #define IRQ_AUTO_5      5       /* level 5 interrupt */
  52 #define IRQ_AUTO_6      6       /* level 6 interrupt */
  53 #define IRQ_AUTO_7      7       /* level 7 interrupt (non-maskable) */
  54
  55 #define IRQ_USER        8
  56
  57 extern unsigned int irq_canonicalize(unsigned int irq);
  58
  59 struct pt_regs;
  60
  61 /*
  62  * various flags for request_irq() - the Amiga now uses the standard
  63  * mechanism like all other architectures - IRQF_DISABLED and
  64  * IRQF_SHARED are your friends.
  65  */
  66 #ifndef MACH_AMIGA_ONLY
  67 #define IRQ_FLG_LOCK    (0x0001)        /* handler is not replaceable   */
  68 #define IRQ_FLG_REPLACE (0x0002)        /* replace existing handler     */
  69 #define IRQ_FLG_FAST    (0x0004)
  70 #define IRQ_FLG_SLOW    (0x0008)
  71 #define IRQ_FLG_STD     (0x8000)        /* internally used              */
  72 #endif
  73
  74 /*
  75  * This structure is used to chain together the ISRs for a particular
  76  * interrupt source (if it supports chaining).
  77  */
  78 typedef struct irq_node {
  79         irqreturn_t     (*handler)(int, void *);
  80         void            *dev_id;
  81         struct irq_node *next;
  82         unsigned long   flags;
  83         const char      *devname;
  84 } irq_node_t;
  85
  86 /*
  87  * This structure has only 4 elements for speed reasons
  88  */
  89 struct irq_handler {
  90         int             (*handler)(int, void *);
  91         unsigned long   flags;
  92         void            *dev_id;
  93         const char      *devname;
  94 };
  95
  96 struct irq_controller {
  97         const char *name;
  98         spinlock_t lock;
  99         int (*startup)(unsigned int irq);
 100         void (*shutdown)(unsigned int irq);
 101         void (*enable)(unsigned int irq);
 102         void (*disable)(unsigned int irq);
 103 };
 104
 105 extern int m68k_irq_startup(unsigned int);
 106 extern void m68k_irq_shutdown(unsigned int);
 107
 108 /*
 109  * This function returns a new irq_node_t
 110  */
 111 extern irq_node_t *new_irq_node(void);
 112
 113 extern void m68k_setup_auto_interrupt(void (*handler)(unsigned int, struct pt_regs *));
 114 extern void m68k_setup_user_interrupt(unsigned int vec, unsigned int cnt,
 115                                       void (*handler)(unsigned int, struct pt_regs *));
 116 extern void m68k_setup_irq_controller(struct irq_controller *, unsigned int, unsigned int);
 117
 118 asmlinkage void m68k_handle_int(unsigned int);
 119 asmlinkage void __m68k_handle_int(unsigned int, struct pt_regs *);
 120
 121 #else
 122 #define irq_canonicalize(irq)  (irq)
 123 #endif /* CONFIG_MMU */
 124
 125 asmlinkage void do_IRQ(int irq, struct pt_regs *regs);
 126
 127 #endif /* _M68K_IRQ_H_ */