void vPortISRHandler( void *pvNullDoNotUse )
{
uint32_t ulInterruptStatus, ulInterruptMask = 1UL;
BaseType_t xInterruptNumber;
XIntc_Config *pxInterruptController;
XIntc_VectorTableEntry *pxTable;
/* Just to remove compiler warning. */
( void ) pvNullDoNotUse;
/* Get the configuration by using the device ID - in this case it is
assumed that only one interrupt controller is being used. */
pxInterruptController = &XIntc_ConfigTable[ XPAR_XPS_INTC_0_DEVICE_ID ];
/* Which interrupts are pending? */
ulInterruptStatus = XIntc_mGetIntrStatus( pxInterruptController->BaseAddress );
for( xInterruptNumber = 0; xInterruptNumber < XPAR_INTC_MAX_NUM_INTR_INPUTS; xInterruptNumber++ )
{
if( ulInterruptStatus & 0x01UL )
{
/* Clear the pending interrupt. */
XIntc_mAckIntr( pxInterruptController->BaseAddress, ulInterruptMask );
/* Call the registered handler. */
pxTable = &( pxInterruptController->HandlerTable[ xInterruptNumber ] );
pxTable->Handler( pxTable->CallBackRef );
}
/* Check the next interrupt. */
ulInterruptMask <<= 0x01UL;
ulInterruptStatus >>= 0x01UL;
/* Have we serviced all interrupts? */
if( ulInterruptStatus == 0UL )
{
break;
}
}
}
/**
*
* This function is the primary interrupt handler for the driver. It must be
* connected to the interrupt source such that is called when an interrupt of
* the interrupt controller is active. It will resolve which interrupts are
* active and enabled and call the appropriate interrupt handler. It uses
* the AckBeforeService flag in the configuration data to determine when to
* acknowledge the interrupt. Highest priority interrupts are serviced first.
* This function assumes that an interrupt vector table has been previously
* initialized.It does not verify that entries in the table are valid before
* calling an interrupt handler. In Cascade mode this function calls
* XIntc_CascadeHandler to handle interrupts of Master and Slave controllers.
* This functions also handles interrupts nesting by saving and restoring link
* register of Microblaze and Interrupt Level register of interrupt controller
* properly.
* @param DeviceId is the zero-based device ID defined in xparameters.h
* of the interrupting interrupt controller. It is used as a direct
* index into the configuration data, which contains the vector
* table for the interrupt controller. Note that even though the
* argument is a void pointer, the value is not a pointer but the
* actual device ID. The void pointer type is necessary to meet
* the XInterruptHandler typedef for interrupt handlers.
*
* @return None.
*
* @note For nested interrupts, this function saves microblaze r14
* register on entry and restores on exit. This is required since
* compiler does not support nesting. This function enables
* Microblaze interrupts after blocking further interrupts
* from the current interrupt number and interrupts below current
* interrupt proirity by writing to Interrupt Level Register of
* INTC on entry. On exit, it disables microblaze interrupts and
* restores ILR register default value(0xFFFFFFFF)back. It is
* recommended to increase STACK_SIZE in linker script for nested
* interrupts.
*
******************************************************************************/
void XIntc_DeviceInterruptHandler(void *DeviceId)
{
u32 IntrStatus;
u32 IntrMask = 1;
int IntrNumber;
XIntc_Config *CfgPtr;
u32 Imr;
/* Get the configuration data using the device ID */
CfgPtr = &XIntc_ConfigTable[(u32)DeviceId];
#if XPAR_INTC_0_INTC_TYPE != XIN_INTC_NOCASCADE
if (CfgPtr->IntcType != XIN_INTC_NOCASCADE) {
XIntc_CascadeHandler(DeviceId);
}
else
#endif
{ /* This extra brace is required for compilation in Cascade Mode */
#if XPAR_XINTC_HAS_ILR == TRUE
#ifdef __MICROBLAZE__
volatile u32 R14_register;
/* Save r14 register */
R14_register = mfgpr(r14);
#endif
volatile u32 ILR_reg;
/* Save ILR register */
ILR_reg = Xil_In32(CfgPtr->BaseAddress + XIN_ILR_OFFSET);
#endif
/* Get the interrupts that are waiting to be serviced */
IntrStatus = XIntc_GetIntrStatus(CfgPtr->BaseAddress);
/* Mask the Fast Interrupts */
if (CfgPtr->FastIntr == TRUE) {
Imr = XIntc_In32(CfgPtr->BaseAddress + XIN_IMR_OFFSET);
IntrStatus &= ~Imr;
}
/* Service each interrupt that is active and enabled by
* checking each bit in the register from LSB to MSB which
* corresponds to an interrupt input signal
*/
for (IntrNumber = 0; IntrNumber < CfgPtr->NumberofIntrs;
IntrNumber++) {
if (IntrStatus & 1) {
XIntc_VectorTableEntry *TablePtr;
#if XPAR_XINTC_HAS_ILR == TRUE
/* Write to ILR the current interrupt
* number
*/
Xil_Out32(CfgPtr->BaseAddress +
XIN_ILR_OFFSET, IntrNumber);
/* Read back ILR to ensure the value
* has been updated and it is safe to
* enable interrupts
*/
Xil_In32(CfgPtr->BaseAddress +
XIN_ILR_OFFSET);
/* Enable interrupts */
Xil_ExceptionEnable();
#endif
/* If the interrupt has been setup to
* acknowledge it before servicing the
* interrupt, then ack it */
if (CfgPtr->AckBeforeService & IntrMask) {
XIntc_AckIntr(CfgPtr->BaseAddress,
IntrMask);
}
/* The interrupt is active and enabled, call
* the interrupt handler that was setup with
* the specified parameter
*/
TablePtr = &(CfgPtr->HandlerTable[IntrNumber]);
TablePtr->Handler(TablePtr->CallBackRef);
/* If the interrupt has been setup to
* acknowledge it after it has been serviced
* then ack it
*/
if ((CfgPtr->AckBeforeService &
IntrMask) == 0) {
XIntc_AckIntr(CfgPtr->BaseAddress,
IntrMask);
}
#if XPAR_XINTC_HAS_ILR == TRUE
/* Disable interrupts */
Xil_ExceptionDisable();
/* Restore ILR */
Xil_Out32(CfgPtr->BaseAddress + XIN_ILR_OFFSET,
ILR_reg);
#endif
/*
* Read the ISR again to handle architectures
* with posted write bus access issues.
*/
XIntc_GetIntrStatus(CfgPtr->BaseAddress);
/*
* If only the highest priority interrupt is to
* be serviced, exit loop and return after
* servicing
* the interrupt
*/
if (CfgPtr->Options == XIN_SVC_SGL_ISR_OPTION) {
#if XPAR_XINTC_HAS_ILR == TRUE
#ifdef __MICROBLAZE__
/* Restore r14 */
mtgpr(r14, R14_register);
#endif
#endif
return;
}
}
/* Move to the next interrupt to check */
IntrMask <<= 1;
IntrStatus >>= 1;
/* If there are no other bits set indicating that all
* interrupts have been serviced, then exit the loop
*/
if (IntrStatus == 0) {
break;
}
}
#if XPAR_XINTC_HAS_ILR == TRUE
#ifdef __MICROBLAZE__
/* Restore r14 */
mtgpr(r14, R14_register);
#endif
#endif
}
}
/**
*
* This function is called by primary interrupt handler for the driver to handle
* all Controllers in Cascade mode.It will resolve which interrupts are active
* and enabled and call the appropriate interrupt handler. It uses the
* AckBeforeService flag in the configuration data to determine when to
* acknowledge the interrupt. Highest priority interrupts are serviced first.
* This function assumes that an interrupt vector table has been previously
* initialized. It does not verify that entries in the table are valid before
* calling an interrupt handler.This function calls itself recursively to handle
* all interrupt controllers.
*
* @param DeviceId is the zero-based device ID defined in xparameters.h
* of the interrupting interrupt controller. It is used as a direct
* index into the configuration data, which contains the vector
* table for the interrupt controller.
*
* @return None.
*
* @note
*
******************************************************************************/
static void XIntc_CascadeHandler(void *DeviceId)
{
u32 IntrStatus;
u32 IntrMask = 1;
int IntrNumber;
u32 Imr;
XIntc_Config *CfgPtr;
static int Id = 0;
/* Get the configuration data using the device ID */
CfgPtr = &XIntc_ConfigTable[(u32)DeviceId];
/* Get the interrupts that are waiting to be serviced */
IntrStatus = XIntc_GetIntrStatus(CfgPtr->BaseAddress);
/* Mask the Fast Interrupts */
if (CfgPtr->FastIntr == TRUE) {
Imr = XIntc_In32(CfgPtr->BaseAddress + XIN_IMR_OFFSET);
IntrStatus &= ~Imr;
}
/* Service each interrupt that is active and enabled by
* checking each bit in the register from LSB to MSB which
* corresponds to an interrupt input signal
*/
for (IntrNumber = 0; IntrNumber < CfgPtr->NumberofIntrs; IntrNumber++) {
if (IntrStatus & 1) {
XIntc_VectorTableEntry *TablePtr;
/* In Cascade mode call this function recursively
* for interrupt id 31 and until interrupts of last
* instance/controller are handled
*/
if ((IntrNumber == 31) &&
(CfgPtr->IntcType != XIN_INTC_LAST) &&
(CfgPtr->IntcType != XIN_INTC_NOCASCADE)) {
XIntc_CascadeHandler((void *)++Id);
Id--;
}
/* If the interrupt has been setup to
* acknowledge it before servicing the
* interrupt, then ack it */
if (CfgPtr->AckBeforeService & IntrMask) {
XIntc_AckIntr(CfgPtr->BaseAddress, IntrMask);
}
/* Handler of 31 interrupt Id has to be called only
* for Last controller in cascade Mode
*/
if (!((IntrNumber == 31) &&
(CfgPtr->IntcType != XIN_INTC_LAST) &&
(CfgPtr->IntcType != XIN_INTC_NOCASCADE))) {
/* The interrupt is active and enabled, call
* the interrupt handler that was setup with
* the specified parameter
*/
TablePtr = &(CfgPtr->HandlerTable[IntrNumber]);
TablePtr->Handler(TablePtr->CallBackRef);
}
/* If the interrupt has been setup to acknowledge it
* after it has been serviced then ack it
*/
if ((CfgPtr->AckBeforeService & IntrMask) == 0) {
XIntc_AckIntr(CfgPtr->BaseAddress, IntrMask);
}
/*
* Read the ISR again to handle architectures with
* posted write bus access issues.
*/
XIntc_GetIntrStatus(CfgPtr->BaseAddress);
/*
* If only the highest priority interrupt is to be
* serviced, exit loop and return after servicing
* the interrupt
*/
if (CfgPtr->Options == XIN_SVC_SGL_ISR_OPTION) {
return;
}
}
/* Move to the next interrupt to check */
IntrMask <<= 1;
IntrStatus >>= 1;
/* If there are no other bits set indicating that all interrupts
* have been serviced, then exit the loop
*/
if (IntrStatus == 0) {
break;
}
}
}
/**
*
* This function is the primary interrupt handler for the driver. It must be
* connected to the interrupt source such that is called when an interrupt of
* the interrupt controller is active. It will resolve which interrupts are
* active and enabled and call the appropriate interrupt handler. It uses
* the AckBeforeService flag in the configuration data to determine when to
* acknowledge the interrupt. Highest priority interrupts are serviced first.
* The driver can be configured to service only the highest priority interrupt
* or all pending interrupts using the {XIntc_SetOptions()} function or
* the {XIntc_SetIntrSrvOption()} function.
*
* This function assumes that an interrupt vector table has been previously
* initialized. It does not verify that entries in the table are valid before
* calling an interrupt handler.
*
* @param DeviceId is the zero-based device ID defined in xparameters.h
* of the interrupting interrupt controller. It is used as a direct
* index into the configuration data, which contains the vector
* table for the interrupt controller. Note that even though the
* argument is a void pointer, the value is not a pointer but the
* actual device ID. The void pointer type is necessary to meet
* the XInterruptHandler typedef for interrupt handlers.
*
* @return None.
*
* @note
*
* The constant XPAR_INTC_MAX_NUM_INTR_INPUTS must be setup for this to compile.
* Interrupt IDs range from 0 - 31 and correspond to the interrupt input signals
* for the interrupt controller. XPAR_INTC_MAX_NUM_INTR_INPUTS specifies the
* highest numbered interrupt input signal that is used.
*
******************************************************************************/
void XIntc_DeviceInterruptHandler(void *DeviceId)
{
u32 IntrStatus;
u32 IntrMask = 1;
int IntrNumber;
XIntc_Config *CfgPtr;
u32 Imr;
/* Get the configuration data using the device ID */
CfgPtr = &XIntc_ConfigTable[(u32) DeviceId];
/* Get the interrupts that are waiting to be serviced */
IntrStatus = XIntc_GetIntrStatus(CfgPtr->BaseAddress);
/* Mask the Fast Interrupts */
if (CfgPtr->FastIntr == TRUE) {
Imr = XIntc_In32(CfgPtr->BaseAddress + XIN_IMR_OFFSET);
IntrStatus &= ~Imr;
}
/* Service each interrupt that is active and enabled by checking each
* bit in the register from LSB to MSB which corresponds to an interrupt
* intput signal
*/
for (IntrNumber = 0; IntrNumber < XPAR_INTC_MAX_NUM_INTR_INPUTS;
IntrNumber++) {
if (IntrStatus & 1) {
XIntc_VectorTableEntry *TablePtr;
/* If the interrupt has been setup to acknowledge it
* before servicing the interrupt, then ack it
*/
if (CfgPtr->AckBeforeService & IntrMask) {
XIntc_AckIntr(CfgPtr->BaseAddress, IntrMask);
}
/* The interrupt is active and enabled, call the
* interrupt handler that was setup with the specified
* parameter
*/
TablePtr = &(CfgPtr->HandlerTable[IntrNumber]);
TablePtr->Handler(TablePtr->CallBackRef);
/* If the interrupt has been setup to acknowledge it
* after it has been serviced then ack it
*/
if ((CfgPtr->AckBeforeService & IntrMask) == 0) {
XIntc_AckIntr(CfgPtr->BaseAddress, IntrMask);
}
/*
* Read the ISR again to handle architectures with posted write
* bus access issues.
*/
XIntc_GetIntrStatus(CfgPtr->BaseAddress);
/*
* If only the highest priority interrupt is to be
* serviced, exit loop and return after servicing
* the interrupt
*/
if (CfgPtr->Options == XIN_SVC_SGL_ISR_OPTION) {
return;
}
}
/* Move to the next interrupt to check */
IntrMask <<= 1;
IntrStatus >>= 1;
/* If there are no other bits set indicating that all interrupts
* have been serviced, then exit the loop
*/
if (IntrStatus == 0) {
break;
}
}
}
