Xilinx MicroBlaze Reference Manual page 87

Software Support
Scrubbing
To ensure that bit errors are not accumulated in block RAMs, they must be periodically scrubbed.
The standalone BSP provides the function
entire LMB block RAM and all MicroBlaze internal block RAMs used in a particular configuration.
This function is intended to be called periodically from a timer interrupt routine.
The following example code illustrates how this can be done.
MicroBlaze Processor Reference Guide
UG081 (v14.7)
#include "xparameters.h"
#include "xtmrctr.h"
#include "xintc.h"
#include "mb_interface.h"
#define SCRUB_PERIOD ...
XIntc InterruptController; /* The Interrupt Controller instance */
XTmrCtr TimerCounterInst;/* The Timer Counter instance */
void MicroBlazeScrubHandler(void *CallBackRef, u8 TmrCtrNumber)
{
/* Perform other timer interrupt processing here */
microblaze_scrub();
}
int main (void)
{
int Status;
/*
* Initialize the timer counter so that it's ready to use,
* specify the device ID that is generated in xparameters.h
*/
Status = XTmrCtr_Initialize(&TimerCounterInst, TMRCTR_DEVICE_ID);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/*
* Connect the timer counter to the interrupt subsystem such that
* interrupts can occur.
*/
Status = XIntc_Initialize(&InterruptController, INTC_DEVICE_ID);
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 = XIntc_Connect(&InterruptController, TMRCTR_DEVICE_ID,
(XInterruptHandler)XTmrCtr_InterruptHandler,
(void *) &TimerCounterInst);
if (Status != XST_SUCCESS) {
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to perform scrubbing of the
microblaze_scrub()
Fault Tolerance
87
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