2c8f92039d
Added initial support Xilinx Embedded Software. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
302 lines
9.7 KiB
C
Executable file
302 lines
9.7 KiB
C
Executable file
/******************************************************************************
|
|
*
|
|
* Copyright (C) 2002 - 2014 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.
|
|
*
|
|
* Use of the Software is limited solely to applications:
|
|
* (a) running on a Xilinx device, or
|
|
* (b) that interact with a Xilinx device through a bus or interconnect.
|
|
*
|
|
* 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
|
|
* XILINX CONSORTIUM 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.
|
|
*
|
|
* Except as contained in this notice, the name of the Xilinx shall not be used
|
|
* in advertising or otherwise to promote the sale, use or other dealings in
|
|
* this Software without prior written authorization from Xilinx.
|
|
*
|
|
******************************************************************************/
|
|
/******************************************************************************/
|
|
/**
|
|
*
|
|
* @file xintc_low_level_example.c
|
|
*
|
|
* This file contains a design example using the low level-0 driver, interface
|
|
* of the Interrupt Controller driver.
|
|
*
|
|
* This example shows the use of the Interrupt Controller both with a PowerPC
|
|
* and a MicroBlaze processor.
|
|
*
|
|
* @note
|
|
* This example can also be used for Cascade mode interrupt
|
|
* controllers by using the interrupt IDs generated in
|
|
* xparameters.h. For Cascade mode, Interrupt IDs are generated
|
|
* in xparameters.h as shown below:
|
|
*
|
|
* Master/Primary INTC
|
|
* ______
|
|
* | |-0 Secondary INTC
|
|
* | |-. ______
|
|
* | |-. | |-32 Last INTC
|
|
* | |-. | |-. ______
|
|
* |______|<--31-----| |-. | |-64
|
|
* | |-. | |-.
|
|
* |______|<--63------| |-.
|
|
* | |-.
|
|
* |______|-95
|
|
*
|
|
* All driver functions has to be called using BaseAddress
|
|
* of Primary/Master Controller only. Driver functions takes
|
|
* care of Slave Controllers based on Interrupt ID passed.
|
|
* User must not use Interrupt source/ID 31 of Primary and
|
|
* Secondary controllers to call driver functions.
|
|
*
|
|
*
|
|
* <pre>
|
|
*
|
|
* MODIFICATION HISTORY:
|
|
*
|
|
* Ver Who Date Changes
|
|
* ----- ---- -------- ---------------------------------------------------------
|
|
* 1.00c rpm 12/04/03 First release
|
|
* 1.00c sv 06/29/05 Minor changes to comply to Doxygen and coding guidelines
|
|
* 2.00a ktn 10/20/09 Updated to use HAL Processor APIs and _m is removed from
|
|
* all the macro names/definitions. Minor changes done as per
|
|
* coding guidelines.
|
|
* </pre>
|
|
******************************************************************************/
|
|
|
|
/***************************** Include Files *********************************/
|
|
|
|
#include "xparameters.h"
|
|
#include "xstatus.h"
|
|
#include "xintc_l.h"
|
|
#include "xil_exception.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_BASEADDR XPAR_INTC_0_BASEADDR
|
|
#define INTC_DEVICE_ID XPAR_INTC_0_DEVICE_ID
|
|
#define INTC_DEVICE_INTR_ID XPAR_INTC_0_UARTLITE_0_VEC_ID
|
|
#define INTC_DEVICE_INT_MASK XPAR_RS232_UART_1_INTERRUPT_MASK
|
|
|
|
|
|
/**************************** Type Definitions *******************************/
|
|
|
|
|
|
/***************** Macros (Inline Functions) Definitions *********************/
|
|
|
|
|
|
/************************** Function Prototypes ******************************/
|
|
|
|
int IntcLowLevelExample(u32 IntcBaseAddress);
|
|
|
|
void SetupInterruptSystem();
|
|
|
|
void DeviceDriverHandler(void *CallbackRef);
|
|
|
|
|
|
/************************** Variable Definitions *****************************/
|
|
|
|
/*
|
|
* Create a shared variable to be used by the main thread of processing and
|
|
* the interrupt processing
|
|
*/
|
|
volatile static int InterruptProcessed = FALSE;
|
|
|
|
/*****************************************************************************/
|
|
/**
|
|
*
|
|
* This is the main function for the Interrupt Controller Low Level example.
|
|
*
|
|
* @param None.
|
|
*
|
|
* @return XST_SUCCESS to indicate success, otherwise XST_FAILURE.
|
|
*
|
|
* @note None.
|
|
*
|
|
******************************************************************************/
|
|
int main(void)
|
|
{
|
|
int Status;
|
|
|
|
/*
|
|
* Run the low level example of Interrupt Controller, specify the Base
|
|
* Address generated in xparameters.h.
|
|
*/
|
|
Status = IntcLowLevelExample(INTC_BASEADDR);
|
|
if (Status != XST_SUCCESS) {
|
|
return XST_FAILURE;
|
|
}
|
|
|
|
return XST_SUCCESS;
|
|
|
|
}
|
|
|
|
/*****************************************************************************/
|
|
/**
|
|
*
|
|
* This function is an example of how to use the interrupt controller driver
|
|
* component (XIntc) 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 IntcBaseAddress is Base Address of the the Interrupt Controller
|
|
* Device.
|
|
*
|
|
* @return XST_SUCCESS to indicate success, otherwise XST_FAILURE.
|
|
*
|
|
* @note None.
|
|
*
|
|
******************************************************************************/
|
|
int IntcLowLevelExample(u32 IntcBaseAddress)
|
|
{
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
XIntc_RegisterHandler(IntcBaseAddress, INTC_DEVICE_INTR_ID,
|
|
(XInterruptHandler)DeviceDriverHandler,
|
|
(void *)0);
|
|
|
|
/*
|
|
* Enable interrupts for all devices that cause interrupts, and enable
|
|
* the INTC master enable bit.
|
|
*/
|
|
XIntc_EnableIntr(IntcBaseAddress, INTC_DEVICE_INT_MASK);
|
|
|
|
|
|
/*
|
|
* Set the master enable bit. Note that we do not enable hardware
|
|
* interrupts yet since we want to simulate an interrupt from software
|
|
* down below.
|
|
*/
|
|
XIntc_Out32(IntcBaseAddress + XIN_MER_OFFSET, XIN_INT_MASTER_ENABLE_MASK);
|
|
|
|
/*
|
|
* This step is processor specific, connect the handler for the
|
|
* interrupt controller to the interrupt source for the processor.
|
|
*/
|
|
SetupInterruptSystem();
|
|
|
|
/*
|
|
* Cause (simulate) an interrupt so the handler will be called. This is
|
|
* done by writing a 1 to the interrupt status bit for the device
|
|
* interrupt.
|
|
*/
|
|
XIntc_Out32(IntcBaseAddress + XIN_ISR_OFFSET, INTC_DEVICE_INT_MASK);
|
|
|
|
/*
|
|
* 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) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
return XST_SUCCESS;
|
|
|
|
}
|
|
/*****************************************************************************/
|
|
/**
|
|
*
|
|
* This function connects the interrupt handler of the interrupt controller to
|
|
* the processor. This function is seperate to allow it to be customized for
|
|
* each application. Each processor or RTOS may require unique processing to
|
|
* connect the interrupt handler.
|
|
*
|
|
* @param None.
|
|
*
|
|
* @return None.
|
|
*
|
|
* @note None.
|
|
*
|
|
******************************************************************************/
|
|
void SetupInterruptSystem()
|
|
{
|
|
/*
|
|
* Initialize the exception table.
|
|
*/
|
|
Xil_ExceptionInit();
|
|
|
|
/*
|
|
* Register the interrupt controller handler with the exception table.
|
|
*/
|
|
Xil_ExceptionRegisterHandler(XIL_EXCEPTION_ID_INT,
|
|
(Xil_ExceptionHandler)XIntc_DeviceInterruptHandler,
|
|
INTC_DEVICE_ID);
|
|
|
|
/*
|
|
* Enable exceptions.
|
|
*/
|
|
Xil_ExceptionEnable();
|
|
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/**
|
|
*
|
|
* 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.
|
|
*
|
|
* @param CallbackRef is passed back to the device driver's interrupt
|
|
* handler by the XIntc driver. It was given to the XIntc driver
|
|
* in the XIntc_Connect() function call. It is typically a pointer
|
|
* to the device driver instance variable if using the Xilinx Level
|
|
* 1 device drivers. In this example, we do not care about the
|
|
* callback reference, so we passed it a 0 when connecting the
|
|
* handler to the XIntc 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;
|
|
|
|
}
|