#include <nitro/os.h>void DC_TouchRange( const void* startAddr, u32 nBytes );
| startAddr | Lowest address in the region to be preloaded. |
| nBytes | Number of bytes of the region to be preloaded. |
None.
Instructs the CPU to pre-load the data in the specified memory region into data cache.
startAddr is rounded down to the closest 32-byte boundary. The sum of startAddr plus nBytes is rounded up to the closest 32-byte boundary.
Note
This function executes a pld instruction, but the ARM946E-S specification dictates that even if it recognizes the pld instruction, it will do nothing. Therefore, this function does not actually do anything. This function is maintained to preserve compatibility with old program code.
Looks ahead with the pld command. This function divides the specified region into cache-line units and repeats its operation over and over. Thus the amount of time it takes is proportional to the size of the region.
2005/12/22 Added a description that the pld command does nothing.
2005/11/14 Changed the startAddr type to const void*.
2005/04/19 Added a description that the amount of time required is proportional to the range size.
2003/12/22 Initial version.
CONFIDENTIAL