arch/m68k/apollo/dn_ints.c

   1 #include <linux/interrupt.h>
   2
   3 #include <asm/irq.h>
   4 #include <asm/traps.h>
   5 #include <asm/apollohw.h>
   6
   7 void dn_process_int(unsigned int irq, struct pt_regs *fp)
   8 {
   9         __m68k_handle_int(irq, fp);
  10
  11         *(volatile unsigned char *)(pica)=0x20;
  12         *(volatile unsigned char *)(picb)=0x20;
  13 }
  14
  15 unsigned int apollo_irq_startup(unsigned int irq)
  16 {
  17         if (irq < 8)
  18                 *(volatile unsigned char *)(pica+1) &= ~(1 << irq);
  19         else
  20                 *(volatile unsigned char *)(picb+1) &= ~(1 << (irq - 8));
  21         return 0;
  22 }
  23
  24 void apollo_irq_shutdown(unsigned int irq)
  25 {
  26         if (irq < 8)
  27                 *(volatile unsigned char *)(pica+1) |= (1 << irq);
  28         else
  29                 *(volatile unsigned char *)(picb+1) |= (1 << (irq - 8));
  30 }
  31
  32 static struct irq_chip apollo_irq_chip = {
  33         .name           = "apollo",
  34         .irq_startup    = apollo_irq_startup,
  35         .irq_shutdown   = apollo_irq_shutdown,
  36 };
  37
  38
  39 void __init dn_init_IRQ(void)
  40 {
  41         m68k_setup_user_interrupt(VEC_USER + 96, 16, dn_process_int);
  42         m68k_setup_irq_chip(&apollo_irq_chip, IRQ_APOLLO, 16);
  43 }