include/asm-sh/irq.h

   1 #ifndef __ASM_SH_IRQ_H
   2 #define __ASM_SH_IRQ_H
   3
   4 #include <asm/machvec.h>
   5
   6 /*
   7  * A sane default based on a reasonable vector table size, platforms are
   8  * advised to cap this at the hard limit that they're interested in
   9  * through the machvec.
  10  */
  11 #define NR_IRQS 256
  12
  13 /*
  14  * Convert back and forth between INTEVT and IRQ values.
  15  */
  16 #ifdef CONFIG_CPU_HAS_INTEVT
  17 #define evt2irq(evt)            (((evt) >> 5) - 16)
  18 #define irq2evt(irq)            (((irq) + 16) << 5)
  19 #else
  20 #define evt2irq(evt)            (evt)
  21 #define irq2evt(irq)            (irq)
  22 #endif
  23
  24 /*
  25  * Simple Mask Register Support
  26  */
  27 extern void make_maskreg_irq(unsigned int irq);
  28 extern unsigned short *irq_mask_register;
  29
  30 /*
  31  * PINT IRQs
  32  */
  33 void init_IRQ_pint(void);
  34
  35 /*
  36  * The shift value is now the number of bits to shift, not the number of
  37  * bits/4. This is to make it easier to read the value directly from the
  38  * datasheets. The IPR address, addr, will be set from ipr_idx via the
  39  * map_ipridx_to_addr function.
  40  */
  41 struct ipr_data {
  42         unsigned int irq;
  43         int ipr_idx;            /* Index for the IPR registered */
  44         int shift;              /* Number of bits to shift the data */
  45         int priority;           /* The priority */
  46         unsigned int addr;      /* Address of Interrupt Priority Register */
  47 };
  48
  49 /*
  50  * Given an IPR IDX, map the value to an IPR register address.
  51  */
  52 unsigned int map_ipridx_to_addr(int idx);
  53
  54 /*
  55  * Enable individual interrupt mode for external IPR IRQs.
  56  */
  57 void ipr_irq_enable_irlm(void);
  58
  59 /*
  60  * Function for "on chip support modules".
  61  */
  62 void make_ipr_irq(struct ipr_data *table, unsigned int nr_irqs);
  63 void make_imask_irq(unsigned int irq);
  64 void init_IRQ_ipr(void);
  65
  66 struct intc2_data {
  67         unsigned short irq;
  68         unsigned char ipr_offset, ipr_shift;
  69         unsigned char msk_offset, msk_shift;
  70         unsigned char priority;
  71 };
  72
  73 void make_intc2_irq(struct intc2_data *, unsigned int nr_irqs);
  74 void init_IRQ_intc2(void);
  75
  76 static inline int generic_irq_demux(int irq)
  77 {
  78         return irq;
  79 }
  80
  81 #define irq_canonicalize(irq)   (irq)
  82 #define irq_demux(irq)          sh_mv.mv_irq_demux(irq)
  83
  84 #ifdef CONFIG_4KSTACKS
  85 extern void irq_ctx_init(int cpu);
  86 extern void irq_ctx_exit(int cpu);
  87 # define __ARCH_HAS_DO_SOFTIRQ
  88 #else
  89 # define irq_ctx_init(cpu) do { } while (0)
  90 # define irq_ctx_exit(cpu) do { } while (0)
  91 #endif
  92
  93 #endif /* __ASM_SH_IRQ_H */