软中断处理

软中断处理流程图及代码如下

#define INTC_DEVICE_ID	XPAR_SCUGIC_SINGLE_DEVICE_ID
XScuGic InterrruptInst;

int InterruptInit(XScuGic *InstancePtr, u16 DeviceId) ;
int InterruptConnnect(XScuGic *InstancePtr, u16 IntId, void * Handler,void *CallBackRef) ;
void SoftHandler(void *CallbackRef) ;

int main()
{
	int Status ;
	Status = InterruptInit(&InterrruptInst, INTC_DEVICE_ID) ;//初始化中断
	if (Status != XST_SUCCESS)
		return XST_FAILURE ;
	InterruptConnnect(&InterrruptInst, SoftIntrIdToCpu0, (void *)SoftHandler, (void *)&InterrruptInst) ;//连接中断
}

int InterruptInit(XScuGic *InstancePtr, u16 DeviceId)
{
	XScuGic_Config *IntcConfig;
	int Status ;
	IntcConfig = XScuGic_LookupConfig(DeviceId);
	Status = XScuGic_CfgInitialize(InstancePtr, IntcConfig, IntcConfig->CpuBaseAddress) ;
	if (Status != XST_SUCCESS)
		return XST_FAILURE ;

	/*初始化异常处理
	 * Initialize the  exception table
	 */
	Xil_ExceptionInit();

	/*注册异常处理回调函数到CPU
	 * Register the interrupt controller handler with the exception table
	 */
	Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
			(Xil_ExceptionHandler)XScuGic_InterruptHandler,
			InstancePtr);

	/*使能异常处理
	 * Enable non-critical exceptions
	 */
	Xil_ExceptionEnable();

	return XST_SUCCESS ;

}

//连接软中断信号并注册中断回掉函数
int InterruptConnnect(XScuGic *InstancePtr, u16 IntId, void * Handler,void *CallBackRef)
{
	int Status ;	
	Status = XScuGic_Connect(InstancePtr, IntId,(Xil_InterruptHandler)Handler,CallBackRef) ;
	if (Status != XST_SUCCESS)
		return XST_FAILURE ;
	XScuGic_Enable(InstancePtr, IntId) ;//使能中断控制器中的软中断
	return XST_SUCCESS ;
}

void SoftHandler(void *CallbackRef)
{
	xil_printf("Soft Interrupt from CPU1\r\n") ;
	soft_flag = 1 ;
}