IC_PrefetchRange

Syntax

#include <nitro/os.h>
void IC_PrefetchRange( const void* startAddr, u32 nBytes );

Arguments

startAddr Lowest address in the prefetch region
nBytes Number of bytes in the prefetch region

Return Values

None.

Description

This function prefetches the instruction code of the specified region into the instruction cache.

startAddr is rounded down to the closest 32-byte boundary. The sum of startAddr + nBytes is rounded up to the closest 32-byte boundary.

Internal Operation

Operates register 7 of the system control coprocessor.

This function divides the specified range into cache-line units and repeats its operation. Thus the amount of time it takes is proportional to the size of the range.

See Also

IC_InvalidateRange, IC_LockdownRange

Revision History

2005/11/14 Changed the type of startAddr to const void*.
2005/04/19 Added a description of the reason why processing time is proportional to the size of the memory region.
2003/12/22 Initial version.

CONFIDENTIAL