+int interrupt_change_callback(u8 src_number,u32 callback) {
+
+ int i;
+ u32 *addr,*cntl;
+
+ cntl=(u32 *)&VICVectCntl0;
+ addr=(u32 *)&VICVectAddr0;
+
+ i=0;
+ while(i<INTERRUPT_MAX_VIC) {
+ if((*cntl&0x1f)==src_number) {
+ *(addr+i)=callback;
+ return INTERRUPT_CALLBACK_CHANGED;
+ }
+ i++;
+ }
+
+ return INTERRUPT_SRC_NOT_USED;
+}
+
+void interrupt_ack(void) {
+
+ VICVectAddr=0;
+}
+
+// specific interrupt handling
+
+// external interrupts
+void interrupt_ext_ir_config(u8 eint,u8 wakeup,u8 mode,u8 polarity) {
+
+ if(eint>3)
+ return;
+
+ if(wakeup)
+ EXTWAKE=(EXTWAKE&0xf)|(1<<eint);
+
+ EXTMODE=(EXTMODE&0xf)|(mode<<eint);
+ EXTPOLAR=(EXTPOLAR&0xf)|(polarity<<eint);
+}
+
+void interrupt_ext_ir_set(u8 eint) {
+
+ if(eint>3)
+ return;
+
+ EXTINT=(1<<eint);
+}
+
+// timer counter interrupts
+void interrupt_tc_config(u8 tcnum,u8 mode,u8 cap,u32 psv) {
+
+ if(tcnum>1)
+ return;
+
+ if(tcnum==0) {
+ T0TCR=0x03;
+ T0CTCR=mode|(cap<<2);
+ T0PR=psv;
+ }
+ else {
+ T1TCR=0x03;
+ T1CTCR=mode|(cap<<2);
+ T1PR=psv;
+ }
+}
+
+void interrupt_tc_match_config(u8 tcnum,u8 mnum,u32 val,u8 mode) {
+
+ u32 *mraddr;
+
+ if(tcnum>1)
+ return;
+
+ if(mnum>3)
+ return;
+
+ if(tcnum==0) {
+ T0MCR=(T0MCR&0x0fff)|(mode<<(3*mnum));
+ mrddr=&T0MR0
+ }
+ else {
+ T1MCR=(T1MCR&0x0fff)|(mode<<(3*mnum));
+ mrddr=&T1MR0
+ }
+
+ mraddr[mnum]=val;
+}
+
+void interrupt_tc_capt_config(u8 tcnum,u8 cnum,u8 mode) {
+
+ if(tcnum>1)
+ return;
+
+ if(cnum>3)
+ return;
+
+ if(tcnum==0)
+ T0CCR=(T0CCR&0x0fff)|(mode<<(3*cnum));
+ else
+ T1CCR=(T1CCR&0x0fff)|(mode<<(3*cnum));
+}
+
+void interrupt_tc_ir_set(u8 tcnum,u8 tcmc) {
+
+ if(tcnum>1)
+ return;
+
+ if(tcnum==0) {
+ T0IR=tcmc;
+ T0TCR=0x01;
+ }
+ else {
+ T1IR=tcmc;
+ T1TCR=0x01;
+ }
+}
+
+// pwm interrupts
+void interrupt_pwm_set_rate(u32 rate) {
+
+ PWMMR0=rate;
+}
+
+void interrupt_pwm_match_config(u8 mnum,u8 op,u8 mode,u32 val1,u32 val2) {
+
+ u32 *addr=&PWMR0;
+
+ *((volatile u32 *)(addr+mnum))=mval;
+ PWMMCR=(PWMMCR&0x1fffff)|(mode<<(op*3));
+}
+
+void interrupt_pwm_enable(u8 mode,u32 ps_val) {
+
+ PWMPR=ps_val;
+ PWMTCR=0x0b;
+}
+
+void interrupt_pwm_ir_set(u8 pwm_channel) {
+
+ PWMIR=(pwm_channel&0x0f)|((pwm_channel&0x70)<<4);
+ PWMTCR=0x09;
+}
+