# DC_UnlockdownAll

## C Specification

      #include <nitro/os.h>

      void DC_UnlockdownAll( void );

## Arguments

None.

## Return Values

None.

## Description

Instruction cache can be locked with `DC_LockdownRange`, which prevents the cache from being deleted. `DC_Unlockdown` releases the instruction cache to be deleted when the cache is replaced. The function releases all regions locked with `DC_LockdownRange`.

## Internal Operation

Operates registers 7 and 9 of the system control coprocessor.

## See Also

`DC_LockdownRange,DC_Unlockdown`

## Revision History

01/21/2005 Initial version.

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