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         VICIntEnClear=(1<<src_number);
  23
  24 }
  25
  26 int interrupt_enable(u8 src_number,u8 mode,u8 priority,void *callback) {
  27
  28         /* check whether this ir source is allready assigned */
  29         if(VICIntEnable&(1<<src_number))
  30                 return INTERRUPT_EINUSE;
  31
  32         /* force interrupt */
  33         VICIntEnable=(1<<src_number);
  34
  35         switch(mode) {
  36                 case INTERRUPT_FIQ:
  37                         VICIntSelect|=(1<<src_number);
  38                         break;
  39                 case INTERRUPT_VIRQ:
  40
  41                 case INTERRUPT_IRQ:
  42                 case default:
  43         }
  44
  45         return INTERRUPT_SET;
  46 }
  47
  48 /*
  49  * the actual exception handlers (as defined in startup.s)
  50  */
  51
  52 // reset
  53 void interrupt_handler_reset(void) {
  54 }
  55
  56 // undefined instruction
  57 void interrupt_handler_undef_instruction(void) {
  58 }
  59
  60 // software interrupt
  61 void interrupt_handler_soft_ir(void) {
  62 }
  63
  64 // prefetch abort
  65 void interrupt_handler_prefetch_abort(void) {
  66 }
  67
  68 // data abort
  69 void interrupt_handler_data_abort(void) {
  70 }
  71
  72 // fiq
  73 void interrupt_handler_fiq(void) {
  74 }
  75