#include <nitro/os.h>void DC_InvalidateRange( void* startAddr, u32 nBytes );| startAddr | Lowest address in the region to be invalidated |
| nBytes | Number of bytes of the region to be invalidated |
None.
Invalidates the data in the specified data cache region.
startAddr is rounded down to the closest 32-byte boundary. The sum of startAddr + nBytes is rounded up to the closest 32-byte boundary.
Note
The official documentation for the ARM processor sometimes describes Flush as the operation that invalidates the data cache, Clean as the operation that writes back the data cache and puts it into a clean state, and Clean and Flush as the operation that writes back and then invalidates. However, this SDK follows the conventions of the Nintendo GameCube and Nintendo64 by using Invalidate for invalidation, Store for writeback, and Flush for writeback and invalidate operations.
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.
IC_InvalidateAll
IC_InvalidateRange
DC_InvalidateAll
DC_StoreAll
DC_StoreRange
DC_FlushAll
DC_FlushRange
2005/04/19 Added note explaining that processing time is proportional to the size of the range.
2003/12/22 Initial version.
CONFIDENTIAL