betty/interrupts.c

   1 /*
   2  * interrupts.c - arm exception handling
   3  *
   4  * author: hackbard@hackdaworld.org
   5  *
   6  */
   7
   8 #include "interrupts.h"
   9
  10 /*
  11  * functions
  12  */
  13
  14 void interrupt_set_default_callback(void *callback) {
  15
  16         VICDefVectAddr=(u32)callback;
  17
  18 }
  19
  20 void interrupt_clear(u8 src_number) {
  21
  22 }
  23
  24 int interrupt_set(u8 src_number,u8 mode,u8 priority,void *callback) {
  25
  26         /* check whether this ir source is allready assigned */
  27         if(VICSoftInt&(1<<src_number))
  28                 return INTERRUPT_EINUSE;
  29
  30         /* force interrupt */
  31         VICSoftInt|=(1<<src_number);
  32         VICIntEnable|=(1<<src_number);
  33
  34         switch(mode) {
  35                 case INTERRUPT_FIQ:
  36                         VICIntSelect|=(1<<src_number);
  37                         break;
  38                 case INTERRUPT_VIRQ:
  39                 case INTERRUPT_IRQ:
  40                 case default:
  41         }
  42
  43         return INTERRUPT_SET;
  44 }
  45
  46 /*
  47  * the actual exception handlers (as defined in startup.s)
  48  */
  49
  50 // reset
  51 void interrupt_handler_reset(void) {
  52 }
  53
  54 // undefined instruction
  55 void interrupt_handler_undef_instruction(void) {
  56 }
  57
  58 // software interrupt
  59 void interrupt_handler_soft_ir(void) {
  60 }
  61
  62 // prefetch abort
  63 void interrupt_handler_prefetch_abort(void) {
  64 }
  65
  66 // data abort
  67 void interrupt_handler_data_abort(void) {
  68 }
  69
  70 // fiq
  71 void interrupt_handler_fiq(void) {
  72 }
  73