CacheRangeFlush (Windows CE 5.0)

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This function is called by device drivers and applications to flush a specific range of the cache.

void CacheRangeFlush(LPVOIDpAddr,DWORDdwLength,DWORDdwFlags );

Parameters

• pAddr
  [in] Starting virtual address where the cache operation is to be performed in. The cache operation is specified by the value in dwFlags.
• dwLength
  [in] Specifies the length, in bytes.
• dwFlags
  [in] Specifies the operation to be performed. The following table shows the values you can specify for the dwFlags parameter.

  Value	Description
  CACHE_SYNC_WRITEBACK	Write back cached data.
  CACHE_SYNC_DISCARD	Write back and discard cached data.
  CACHE_SYNC_INSTRUCTIONS	Discard all cached instructions.
  CACHE_SYNC_FLUSH_I_TLB	Flush the instruction translation look-aside buffer (TLB).
  CACHE_SYNC_FLUSH_D_TLB	Flush the data TLB.
  CACHE_SYNC_FLUSH_TLB	Flush both the instruction and data TLBs.
  CACHE_SYNC_L2_WRITEBACK	Write back the L2 cache.
  CACHE_SYNC_L2_DISCARD	Write back and discard the L2 cache.
  CACHE_SYNC_ALL	Perform all of the above operations.

Return Values

None.

Remarks

pAddr=0 and dwLength=0 is a special case, which means all addresses. For example, the call CacheRangeFlush(0, 0, CACHE_SYNC_FLUSH_TLB) will flush the data in the TLB. CacheRangeFlush(0, 0, CACHE_SYNC_DISCARD) will write back and discard everything in the data cache.

Requirements

OS Versions: Windows CE .NET 4.2 and later.
Header: Pkfuncs.h.
Link Library: Coredll.lib.

See Also

OEMCacheRangeFlush

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