/* $Id: xintc_intr.c,v 1.4 2005/01/04 17:48:57 moleres Exp $ *//********************************************************************************       XILINX IS PROVIDING THIS DESIGN, CODE, OR INFORMATION "AS IS"*       AS A COURTESY TO YOU, SOLELY FOR USE IN DEVELOPING PROGRAMS AND*       SOLUTIONS FOR XILINX DEVICES.  BY PROVIDING THIS DESIGN, CODE,*       OR INFORMATION AS ONE POSSIBLE IMPLEMENTATION OF THIS FEATURE,*       APPLICATION OR STANDARD, XILINX IS MAKING NO REPRESENTATION*       THAT THIS IMPLEMENTATION IS FREE FROM ANY CLAIMS OF INFRINGEMENT,*       AND YOU ARE RESPONSIBLE FOR OBTAINING ANY RIGHTS YOU MAY REQUIRE*       FOR YOUR IMPLEMENTATION.  XILINX EXPRESSLY DISCLAIMS ANY*       WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE*       IMPLEMENTATION, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR*       REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF*       INFRINGEMENT, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS*       FOR A PARTICULAR PURPOSE.**       (c) Copyright 2002-2004 Xilinx Inc.*       All rights reserved.*******************************************************************************//*****************************************************************************//**** @file xintc_intr.c** This file contains the interrupt processing for the XIntc component which* is the driver for the Xilinx Interrupt Controller.  The interrupt* processing is partitioned seperately such that users are not required to* use the provided interrupt processing.  This file requires other files of* the driver to be linked in also.** Two different interrupt handlers are provided for this driver such that the* user must select the appropriate handler for the application.  The first* interrupt handler, XIntc_VoidInterruptHandler, is provided for systems* which use only a single interrupt controller or for systems that cannot* otherwise provide an argument to the XIntc interrupt handler (e.g., the RTOS* interrupt vector handler may not provide such a facility).  The constant* XPAR_INTC_SINGLE_DEVICE_ID must be defined for this handler to be included in* the driver.  The second interrupt handler, XIntc_InterruptHandler, uses an* input argument which is an instance pointer to an interrupt controller driver* such that multiple interrupt controllers can be supported.  This handler* requires the calling function to pass it the appropriate argument, so another* level of indirection may be required.** Note that both of these handlers are now only provided for backward* compatibility. The handler defined in xintc_l.c is the recommended handler.** The interrupt processing may be used by connecting one of the interrupt* handlers to the interrupt system.  These handlers do not save and restore* the processor context but only handle the processing of the Interrupt* Controller.  The two handlers are provided as working examples. The user is* encouraged to supply their own interrupt handler when performance tuning is* deemed necessary.** <pre>* MODIFICATION HISTORY:** Ver   Who  Date     Changes* ----- ---- -------- ---------------------------------------------------------* 1.00b jhl  02/13/02 First release* 1.00c rpm  10/17/03 New release. Support the static vector table created*                     in the xintc_g.c configuration table. Collapse handlers*                     to use the XIntc_DeviceInterruptHandler() in xintc_l.c.* 1.00c rpm  04/09/04 Added conditional compilation around the old handler*                     XIntc_VoidInterruptHandler(). This handler will only be*                     include/compiled if XPAR_INTC_SINGLE_DEVICE_ID is defined.* </pre>** @internal** This driver assumes that the context of the processor has been saved prior to* the calling of the Interrupt Controller interrupt handler and then restored* after the handler returns. This requires either the running RTOS to save the* state of the machine or that a wrapper be used as the destination of the* interrupt vector to save the state of the processor and restore the state* after the interrupt handler returns.*******************************************************************************//***************************** Include Files *********************************/#include "xbasic_types.h"#include "xparameters.h"#include "xintc.h"/************************** Constant Definitions *****************************//**************************** Type Definitions *******************************//***************** Macros (Inline Functions) Definitions *********************//************************** Function Prototypes ******************************//************************** Variable Definitions *****************************//*****************************************************************************//**** Interrupt handler for the driver used when there can be no argument passed* to the handler.  This function is provided mostly for backward compatibility.* The user should use XIntc_DeviceInterruptHandler(), defined in xintc_l.c,* if possible.** The user must connect this function to the interrupt system such that it is* called whenever the devices which are connected to it cause an interrupt.** @return** None.** @note** The constant XPAR_INTC_SINGLE_DEVICE_ID must be defined for this handler* to be included in the driver compilation.*******************************************************************************/#ifdef XPAR_INTC_SINGLE_DEVICE_IDvoid XIntc_VoidInterruptHandler(){    /* Use the single instance to call the main interrupt handler */    XIntc_DeviceInterruptHandler((void *)XPAR_INTC_SINGLE_DEVICE_ID);}#endif/*****************************************************************************//**** The interrupt handler for the driver. This function is provided mostly for* backward compatibility.  The user should use XIntc_DeviceInterruptHandler(),* defined in xintc_l.c when possible and pass the device ID of the interrupt* controller device as its argument.** The user must connect this function to the interrupt system such that it is* called whenever the devices which are connected to it cause an interrupt.** @param** InstancePtr is a pointer to the XIntc instance to be worked on.** @return** None.** @note** None.*******************************************************************************/void XIntc_InterruptHandler(XIntc *InstancePtr){    /* assert that the pointer to the instance is valid     */    XASSERT_VOID(InstancePtr != XNULL);    /* Use the instance's device ID to call the main interrupt handler.     * (the casts are to avoid a compiler warning)     */    XIntc_DeviceInterruptHandler((void *)((Xuint32)(InstancePtr->CfgPtr->DeviceId)));}