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Newbie
Newbie
293 Views
Registered: ‎05-20-2020

how to disable sgi interrupt between cpu0 and cpu1?what about disable write protection for CFGSDISABLE?

I download xscugic_example.c to test sgi  interrupt, I want to disable the specific interrupt at a certain time,and then enable it,hower It doesn't work when I disabled it by using function:XScuGic_Disable(&InterruptController, INTC_DEVICE_INT_ID);  How can I disable the interrupt ?Here is my code:

/******************************************************************************
*
* Copyright (C) 2010 - 2015 Xilinx, Inc.  All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*
*
******************************************************************************/
/******************************************************************************/
/**
*
* @file xscugic_example.c
*
* This file contains a design example using the Interrupt Controller driver
* (XScuGic) and hardware device. Please reference other device driver examples
* to see more examples of how the intc and interrupts can be used by a software
* application.
*
* @note
*
* None
*
* <pre>
*
* MODIFICATION HISTORY:
* Ver   Who  Date     Changes
* ----- ---- -------- ----------------------------------------------------
* 1.00a drg  01/18/10 First release
* </pre>
******************************************************************************/

/***************************** Include Files *********************************/

#include <stdio.h>
#include <stdlib.h>
#include "xil_io.h"
#include "xil_exception.h"
#include "xparameters.h"
#include "xil_cache.h"
#include "xil_printf.h"
#include "xil_types.h"
#include "xscugic.h"

/************************** Constant Definitions *****************************/

/*
 * The following constants map to the XPAR parameters created in the
 * xparameters.h file. They are defined here such that a user can easily
 * change all the needed parameters in one place.
 */
#define INTC_DEVICE_ID		XPAR_SCUGIC_0_DEVICE_ID
#define INTC_DEVICE_INT_ID	0x0E

/**************************** Type Definitions *******************************/

/***************** Macros (Inline Functions) Definitions *********************/

/************************** Function Prototypes ******************************/
int ScuGicExample(u16 DeviceId);
int SetUpInterruptSystem(XScuGic *XScuGicInstancePtr);
void DeviceDriverHandler(void *CallbackRef);

/************************** Variable Definitions *****************************/

XScuGic InterruptController; 	     /* Instance of the Interrupt Controller */
static XScuGic_Config *GicConfig;    /* The configuration parameters of the
                                       controller */

/*
 * Create a shared variable to be used by the main thread of processing and
 * the interrupt processing
 */
volatile static int InterruptProcessed = FALSE;

static void AssertPrint(const char8 *FilenamePtr, s32 LineNumber){
	xil_printf("ASSERT: File Name: %s ", FilenamePtr);
	xil_printf("Line Number: %d\r\n",LineNumber);
}

/*****************************************************************************/
/**
*
* This is the main function for the Interrupt Controller example.
*
* @param	None.
*
* @return	XST_SUCCESS to indicate success, otherwise XST_FAILURE.
*
* @note		None.
*
****************************************************************************/
int main(void)
{
	int Status;


	/*
	 * Setup an assert call back to get some info if we assert.
	 */
	Xil_AssertSetCallback(AssertPrint);

	xil_printf("GIC Example Test\r\n");

	/*
	 *  Run the Gic example , specify the Device ID generated in xparameters.h
	 */
	Status = ScuGicExample(INTC_DEVICE_ID);
	if (Status != XST_SUCCESS) {
		xil_printf("GIC Example Test Failed\r\n");
		return XST_FAILURE;
	}

	xil_printf("Successfully ran GIC Example Test\r\n");
	return XST_SUCCESS;
}

/*****************************************************************************/
/**
*
* This function is an example of how to use the interrupt controller driver
* (XScuGic) and the hardware device.  This function is designed to
* work without any hardware devices to cause interrupts. It may not return
* if the interrupt controller is not properly connected to the processor in
* either software or hardware.
*
* This function relies on the fact that the interrupt controller hardware
* has come out of the reset state such that it will allow interrupts to be
* simulated by the software.
*
* @param	DeviceId is Device ID of the Interrupt Controller Device,
*		typically XPAR_<INTC_instance>_DEVICE_ID value from
*		xparameters.h
*
* @return	XST_SUCCESS to indicate success, otherwise XST_FAILURE
*
* @note		None.
*
******************************************************************************/
#define APU_CTRL ((volatile unsigned int*)0xF8000300)
#define ICDICTR ((volatile unsigned int*)0xF8F01004)


int ScuGicExample(u16 DeviceId)
{
	int Status;

	/*
	 * Initialize the interrupt controller driver so that it is ready to
	 * use.
	 */
	GicConfig = XScuGic_LookupConfig(DeviceId);
	if (NULL == GicConfig) {
		return XST_FAILURE;
	}

	Status = XScuGic_CfgInitialize(&InterruptController, GicConfig,
					GicConfig->CpuBaseAddress);
	if (Status != XST_SUCCESS) {
		return XST_FAILURE;
	}


	/*
	 * Perform a self-test to ensure that the hardware was built
	 * correctly
	 */
	Status = XScuGic_SelfTest(&InterruptController);
	if (Status != XST_SUCCESS) {
		return XST_FAILURE;
	}


	Status = SetUpInterruptSystem(&InterruptController);
	if (Status != XST_SUCCESS) {
		return XST_FAILURE;
	}

	/*
	 * Connect a device driver handler that will be called when an
	 * interrupt for the device occurs, the device driver handler performs
	 * the specific interrupt processing for the device
	 */
	Status = XScuGic_Connect(&InterruptController, INTC_DEVICE_INT_ID,
			   (Xil_ExceptionHandler)DeviceDriverHandler,
			   (void *)&InterruptController);

	if (Status != XST_SUCCESS) {
		return XST_FAILURE;
	}

	/*
	 * Enable the interrupt for the device and then cause (simulate) an
	 * interrupt so the handlers will be called
	 */
	XScuGic_Enable(&InterruptController, INTC_DEVICE_INT_ID);

	/*
	 *  Simulate the Interrupt
	 */
	Status = XScuGic_SoftwareIntr(&InterruptController,
					INTC_DEVICE_INT_ID,
					XSCUGIC_SPI_CPU0_MASK);
	if (Status != XST_SUCCESS) {
		return XST_FAILURE;
	}

	/*
	 * Wait for the interrupt to be processed, if the interrupt does not
	 * occur this loop will wait forever
	 */
	while (1)
	{
		/*
		 * If the interrupt occurred which is indicated by the global
		 * variable which is set in the device driver handler, then
		 * stop waiting
		 */
		if (InterruptProcessed)
		{
			InterruptProcessed = 0;
			sleep(1);
			XScuGic_SoftwareIntr(&InterruptController,
								INTC_DEVICE_INT_ID,
								XSCUGIC_SPI_CPU0_MASK);
			XScuGic_Disable(&InterruptController, INTC_DEVICE_INT_ID);
		}
	}

	return XST_SUCCESS;
}

/******************************************************************************/
/**
*
* This function connects the interrupt handler of the interrupt controller to
* the processor.  This function is separate to allow it to be customized for
* each application.  Each processor or RTOS may require unique processing to
* connect the interrupt handler.
*
* @param	XScuGicInstancePtr is the instance of the interrupt controller
*		that needs to be worked on.
*
* @return	None.
*
* @note		None.
*
****************************************************************************/
int SetUpInterruptSystem(XScuGic *XScuGicInstancePtr)
{

	/*
	 * Connect the interrupt controller interrupt handler to the hardware
	 * interrupt handling logic in the ARM processor.
	 */
	Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
			(Xil_ExceptionHandler) XScuGic_InterruptHandler,
			XScuGicInstancePtr);

	/*
	 * Enable interrupts in the ARM
	 */
	Xil_ExceptionEnable();

	return XST_SUCCESS;
}

/******************************************************************************/
/**
*
* This function is designed to look like an interrupt handler in a device
* driver. This is typically a 2nd level handler that is called from the
* interrupt controller interrupt handler.  This handler would typically
* perform device specific processing such as reading and writing the registers
* of the device to clear the interrupt condition and pass any data to an
* application using the device driver.  Many drivers already provide this
* handler and the user is not required to create it.
*
* @param	CallbackRef is passed back to the device driver's interrupt
*		handler by the XScuGic driver.  It was given to the XScuGic
*		driver in the XScuGic_Connect() function call.  It is typically
*		a pointer to the device driver instance variable.
*		In this example, we do not care about the callback
*		reference, so we passed it a 0 when connecting the handler to
*		the XScuGic driver and we make no use of it here.
*
* @return	None.
*
* @note		None.
*
****************************************************************************/
void DeviceDriverHandler(void *CallbackRef)
{
	/*
	 * Indicate the interrupt has been processed using a shared variable
	 */
	InterruptProcessed = TRUE;
}
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Xilinx Employee
Xilinx Employee
182 Views
Registered: ‎10-06-2016

Hi @mars111 

Are you still working on this? In theory the XScuGic_Disable is enough to disable certain interrupt. You code is not easy to read with this color code but it seems for me that you are disabling after being handled.

Regards


Ibai
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