release/src-rt-6.x.4708/linux/linux-2.6.36/arch/sh/include/asm/irq.h

   1 #ifndef __ASM_SH_IRQ_H
   2 #define __ASM_SH_IRQ_H
   3
   4 #include <linux/cpumask.h>
   5 #include <asm/machvec.h>
   6
   7 /*
   8  * A sane default based on a reasonable vector table size, platforms are
   9  * advised to cap this at the hard limit that they're interested in
  10  * through the machvec.
  11  */
  12 #define NR_IRQS                 256
  13 #define NR_IRQS_LEGACY          8       /* Legacy external IRQ0-7 */
  14
  15 /*
  16  * This is a special IRQ number for indicating that no IRQ has been
  17  * triggered and to simply ignore the IRQ dispatch. This is a special
  18  * case that can happen with IRQ auto-distribution when multiple CPUs
  19  * are woken up and signalled in parallel.
  20  */
  21 #define NO_IRQ_IGNORE           ((unsigned int)-1)
  22
  23 /*
  24  * Convert back and forth between INTEVT and IRQ values.
  25  */
  26 #ifdef CONFIG_CPU_HAS_INTEVT
  27 #define evt2irq(evt)            (((evt) >> 5) - 16)
  28 #define irq2evt(irq)            (((irq) + 16) << 5)
  29 #else
  30 #define evt2irq(evt)            (evt)
  31 #define irq2evt(irq)            (irq)
  32 #endif
  33
  34 /*
  35  * Simple Mask Register Support
  36  */
  37 extern void make_maskreg_irq(unsigned int irq);
  38 extern unsigned short *irq_mask_register;
  39
  40 /*
  41  * PINT IRQs
  42  */
  43 void init_IRQ_pint(void);
  44 void make_imask_irq(unsigned int irq);
  45
  46 static inline int generic_irq_demux(int irq)
  47 {
  48         return irq;
  49 }
  50
  51 #define irq_demux(irq)          sh_mv.mv_irq_demux(irq)
  52
  53 void init_IRQ(void);
  54 void migrate_irqs(void);
  55
  56 asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs);
  57
  58 #ifdef CONFIG_IRQSTACKS
  59 extern void irq_ctx_init(int cpu);
  60 extern void irq_ctx_exit(int cpu);
  61 # define __ARCH_HAS_DO_SOFTIRQ
  62 #else
  63 # define irq_ctx_init(cpu) do { } while (0)
  64 # define irq_ctx_exit(cpu) do { } while (0)
  65 #endif
  66
  67 #ifdef CONFIG_INTC_BALANCING
  68 extern unsigned int irq_lookup(unsigned int irq);
  69 extern void irq_finish(unsigned int irq);
  70 #else
  71 #define irq_lookup(irq)         (irq)
  72 #define irq_finish(irq)         do { } while (0)
  73 #endif
  74
  75 #include <asm-generic/irq.h>
  76 #ifdef CONFIG_CPU_SH5
  77 #include <cpu/irq.h>
  78 #endif
  79
  80 #endif /* __ASM_SH_IRQ_H */