embedded/arch/generic/defines/irq_generic.h

   1 #ifndef _IRQ_GENERIC_H
   2 #define _IRQ_GENERIC_H
   3
   4 #ifndef _WITHIN_CPU_DEF_H
   5 #error irq_generic.h cannot be included directly, use cpu_def.h
   6 #endif /*_WITHIN_CPU_DEF_H*/
   7
   8 #ifdef WITH_IRQ_RETVAL
   9
  10 typedef int irqreturn_t;
  11 #define IRQ_NONE       0
  12 #define IRQ_HANDLED    1
  13 #define IRQ_RETVAL(x)  ((x)!=IRQ_NONE?IRQ_HANDLED:IRQ_NONE)
  14
  15 #else /*WITH_IRQ_RETVAL*/
  16
  17 typedef void irqreturn_t;
  18 #define IRQ_NONE       ((void)0)
  19 #define IRQ_HANDLED    ((void)1)
  20 #define IRQ_RETVAL(x)  ((x)!=IRQ_NONE?IRQ_HANDLED:IRQ_NONE)
  21
  22 #endif /*WITH_IRQ_RETVAL*/
  23
  24
  25 #ifndef IRQ_HANDLER_FNC
  26 #ifdef WITH_IRQ_HANDLER_ARGS
  27
  28 typedef irqreturn_t (irq_handler_t)(int, void *);
  29 #define IRQ_HANDLER_FNC(M_fnc_name) \
  30   irqreturn_t M_fnc_name(int __irq_handler_irqidx, void *__irq_handler_context)
  31
  32 #define irq_handler_get_irqidx() (__irq_handler_irqidx)
  33 #define irq_handler_get_context() (__irq_handler_context)
  34
  35 #else /*WITH_IRQ_HANDLER_ARGS*/
  36
  37 typedef irqreturn_t (irq_handler_t)(void);
  38 #define IRQ_HANDLER_FNC(M_fnc_name) \
  39   irqreturn_t M_fnc_name(void)
  40
  41 /* irq_handler_get_* have to be CPU specific */
  42
  43 /* Typical interrupt processing when context and irqidx
  44    are not resolved by assembler/C IRQ routine for
  45    common to all vectors/irqidx */
  46
  47 #define irq_handler_get_irqidx() \
  48         irq_arch_get_irqidx()
  49 #define irq_handler_get_context() \
  50         (irq_context_table[irq_handler_get_irqidx()])
  51
  52 #endif /*WITH_IRQ_HANDLER_ARGS*/
  53 #endif /*IRQ_HANDLER_FNC*/
  54
  55 #ifndef irq_irqidx2irqnum
  56
  57 #ifndef IRQ_IRQIDX_OFFSET
  58 #define IRQ_IRQIDX_OFFSET 0
  59 #endif /*IRQ_IRQIDX_OFFSET*/
  60
  61 #define irq_irqnum2irqidx(x) ((x) + IRQ_IRQIDX_OFFSET)
  62 #define irq_irqidx2irqnum(x) ((x) - IRQ_IRQIDX_OFFSET)
  63
  64 #endif /*irq_irqidx2irqnum*/
  65
  66 #ifndef irq_handler_get_irqnum
  67 #define irq_handler_get_irqnum() irq_irqidx2irqnum(irq_handler_get_irqidx())
  68 #endif /*irq_handler_get_irqnum*/
  69
  70 /* for compatabilty with Linux kernel naming */
  71 #define irq_handler_get_dev() irq_handler_get_context()
  72
  73
  74 /*
  75 Next variables are typically defined by CPU support
  76
  77 extern void **irq_context_table;
  78 extern irq_handler_t **irq_handler_table;
  79 extern int irq_table_size;
  80 */
  81
  82 #define IRQF_TRIGGER_NONE       0x00000000
  83 #define IRQF_TRIGGER_RISING     0x00000001
  84 #define IRQF_TRIGGER_FALLING    0x00000002
  85 #define IRQF_TRIGGER_HIGH       0x00000004
  86 #define IRQF_TRIGGER_LOW        0x00000008
  87 #define IRQF_TRIGGER_MASK       (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW | \
  88                                  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)
  89
  90 extern int
  91 request_irq(unsigned int irqnum, irq_handler_t *handler, unsigned long flags,
  92             const char *name, void *context);
  93
  94 extern void free_irq(unsigned int irqnum, void *context);
  95
  96 extern void disable_irq(unsigned int irqnum);
  97 extern void enable_irq(unsigned int irqnum);
  98 extern int set_irq_type(unsigned int irqnum, unsigned int type);
  99 extern int set_irq_priority(int irqnum, int level);
 100
 101 #endif /*_IRQ_GENERIC_H*/