MEMORY_CACHING_TYPE - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// miniport.h
typedef enum _MEMORY_CACHING_TYPE {
MmNonCached,
MmCached,
MmWriteCombined,
MmHardwareCoherentCached,
MmNonCachedUnordered,
MmUSWCCached,
MmMaximumCacheType,
MmNotMapped
} MEMORY_CACHING_TYPE;
View the official Windows Driver Kit DDI reference// wdm.h
typedef enum _MEMORY_CACHING_TYPE {
MmNonCached,
MmCached,
MmWriteCombined,
MmHardwareCoherentCached,
MmNonCachedUnordered,
MmUSWCCached,
MmMaximumCacheType,
MmNotMapped
} MEMORY_CACHING_TYPE;
View the official Windows Driver Kit DDI referenceNo description available.
The MEMORY_CACHING_TYPE enumeration type specifies the permitted caching behavior when allocating or mapping memory.
MmNonCachedThe requested memory should not be cached by the processor.
MmCachedThe processor should cache the requested memory.
MmWriteCombinedThe requested memory should not be cached by the processor, but writes to the memory can be combined by the processor.
MmHardwareCoherentCachedReserved for system use.
MmNonCachedUnorderedReserved for system use.
MmUSWCCachedReserved for system use.
MmMaximumCacheTypeReserved for system use.
MmNotMappedProcessor translation buffers cache virtual to physical address translations. These translation buffers allow many virtual addresses to map a single physical address. However, only one caching behavior is allowed for any given physical address translation. Therefore, if a driver maps two different virtual address ranges to the same physical address, it must ensure that it specifies the same caching behavior for both. Otherwise, the processor behavior is undefined with unpredictable system results.
MmAllocateContiguousMemorySpecifyCache
MmFreeContiguousMemorySpecifyCache
MmMapLockedPagesWithReservedMapping
The MEMORY_CACHING_TYPE enumeration type specifies the permitted caching behavior when allocating or mapping memory.
MmNonCachedThe requested memory should not be cached by the processor.
MmCachedThe processor should cache the requested memory.
MmWriteCombinedThe requested memory should not be cached by the processor, but writes to the memory can be combined by the processor.
MmHardwareCoherentCachedReserved for system use.
MmNonCachedUnorderedReserved for system use.
MmUSWCCachedReserved for system use.
MmMaximumCacheTypeReserved for system use.
MmNotMappedProcessor translation buffers cache virtual to physical address translations. These translation buffers allow many virtual addresses to map a single physical address. However, only one caching behavior is allowed for any given physical address translation. Therefore, if a driver maps two different virtual address ranges to the same physical address, it must ensure that it specifies the same caching behavior for both. Otherwise, the processor behavior is undefined with unpredictable system results.
MmAllocateContiguousMemorySpecifyCache
MmFreeContiguousMemorySpecifyCache
MmMapLockedPagesWithReservedMapping