X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Farm.git;a=blobdiff_plain;f=betty%2Finterrupts.c;h=bb2344cca56897fe873747d8de306d0bbca3711f;hp=fa1fcc1f82dccc54816d7d26ea12aad43692c795;hb=202c5cb4442b81aa5d0f7389b6dca62b2c121ac1;hpb=6543545b048b7059941b0f6680227ec4ce26535e

diff --git a/betty/interrupts.c b/betty/interrupts.c
index fa1fcc1..bb2344c 100644
--- a/betty/interrupts.c
+++ b/betty/interrupts.c
@@ -7,10 +7,94 @@
 
 #include "interrupts.h"
 
+/*
+ * module static interrupt variable
+ */
+
+static t_interrupt interrupt;
+
 /*
  * functions
  */
 
+void interrupt_init(void) {
+
+	memset(&interrupt,0,sizeof(t_interrupt));
+	VICSoftIntClear=0xff;
+	VICIntEnClear=0xff;
+	VICDefVectAddr=0;
+}
+
+void interrupt_set_default_callback(u32 callback_addr) {
+
+	VICDefVectAddr=callback_addr;
+}
+
+void interrupt_set_soft_callback(void (*callback)(void)) {
+
+	interrupt->default_soft_callback=callback;
+}
+
+void interrupt_soft_clear(u8 src_number) {
+
+	VICSoftIntClear=(1<<src_number);
+}
+void interrupt_clear(u8 src_number) {
+
+	int cnt;
+	u32 *addr;
+	u32 *cntl;
+
+	VICIntEnClear=(1<<src_number);
+	VICIntSelect&=~(1<<src_number);
+
+	addr=&VICVectAddr0;
+	cntl=&VICVectCntl0;
+
+	for(cnt=0;cnt<INTERRUPT_MAX_VIC;cnt++) {
+		if(cntl[cnt]&0x1f==src_number) {
+			*((volatile u32 *)(addr+cnt))=0;
+			*((volatile u32 *)(cntl+cnt))=0;
+		}
+	}
+}
+
+void interrupt_soft_enable(u8 src_number) {
+	
+	VICSoftInt=(1<<src_number);
+}
+
+int interrupt_enable(u8 src_number,u8 mode,u8 priority,u32 callback_addr) {
+
+	u32 *addr;
+	u32 *cntl;
+
+	addr=&VICVectAddr0;
+	cntl=&VICVectCntl0;
+
+	/* check whether this ir source is allready assigned */
+	if(VICIntEnable&(1<<src_number))
+		return INTERRUPT_USED;
+
+	/* force interrupt */
+	VICIntEnable=(1<<src_number);
+
+	switch(mode) {
+		case INTERRUPT_FIQ:
+			VICIntSelect|=(1<<src_number);
+			break;
+		case INTERRUPT_VIRQ:
+			if(addr[p]&0x3f)
+				return INTERRUP_PRIORITY_USED;
+			*((volatile u32 *)(addr+p))=callback_addr;
+			*((volatile u32 *)(cntl+p))=src_number&0x1f+(1<<5);
+		case INTERRUPT_IRQ:
+		case default:
+	}
+
+	return INTERRUPT_SET;
+}
+
 /*
  * the actual exception handlers (as defined in startup.s)
  */
@@ -25,6 +109,9 @@ void interrupt_handler_undef_instruction(void) {
 
 // software interrupt
 void interrupt_handler_soft_ir(void) {
+	
+	if(interrupt.default_soft_callback)
+		interrupt.default_soft_callback();
 }
 
 // prefetch abort
@@ -35,10 +122,6 @@ void interrupt_handler_prefetch_abort(void) {
 void interrupt_handler_data_abort(void) {
 }
 
-// irq
-void interrupt_handler_irq(void) {
-}
-
 // fiq
 void interrupt_handler_fiq(void) {
 }