UInt32 _descriptorsCount;
bool _descriptorsIsAllocated;
- virtual void free();
-
- /*
- * These methods are not supported under this subclass.
- */
-
- virtual bool initWithAddress( void * address, /* not supported */
- IOByteCount withLength,
- IODirection withDirection );
-
- virtual bool initWithAddress( vm_address_t address, /* not supported */
- IOByteCount withLength,
- IODirection withDirection,
- task_t withTask );
-
- virtual bool initWithPhysicalAddress(
- IOPhysicalAddress address, /* not supported */
- IOByteCount withLength,
- IODirection withDirection );
-
- virtual bool initWithPhysicalRanges(
- IOPhysicalRange * ranges, /* not supported */
- UInt32 withCount,
- IODirection withDirection,
- bool asReference = false );
-
- virtual bool initWithRanges( IOVirtualRange * ranges, /* not supported */
- UInt32 withCount,
- IODirection withDirection,
- task_t withTask,
- bool asReference = false );
-
- virtual void * getVirtualSegment( IOByteCount offset, /* not supported */
- IOByteCount * length );
-
- IOMemoryDescriptor::withAddress; /* not supported */
- IOMemoryDescriptor::withPhysicalAddress; /* not supported */
- IOMemoryDescriptor::withPhysicalRanges; /* not supported */
- IOMemoryDescriptor::withRanges; /* not supported */
- IOMemoryDescriptor::withSubRange; /* not supported */
+ virtual void free() APPLE_KEXT_OVERRIDE;
public:
IODirection withDirection,
bool asReference = false );
-/*! @function getPhysicalAddress
- @abstract Return the physical address of the first byte in the memory.
- @discussion This method returns the physical address of the first byte in the memory. It is most useful on memory known to be physically contiguous.
- @result A physical address. */
+/*! @function getPhysicalSegment
+ @abstract Break a memory descriptor into its physically contiguous segments.
+ @discussion This method returns the physical address of the byte at the given offset into the memory, and optionally the length of the physically contiguous segment from that offset.
+ @param offset A byte offset into the memory whose physical address to return.
+ @param length If non-zero, getPhysicalSegment will store here the length of the physically contiguous segement at the given offset.
+ @result A physical address, or zero if the offset is beyond the length of the memory. */
- virtual IOPhysicalAddress getPhysicalSegment( IOByteCount offset,
- IOByteCount * length );
-
-#if !(defined(__ppc__) && defined(KPI_10_4_0_PPC_COMPAT))
- virtual addr64_t getPhysicalSegment64( IOByteCount offset,
- IOByteCount * length );
-#endif
+ virtual addr64_t getPhysicalSegment( IOByteCount offset,
+ IOByteCount * length,
+ IOOptionBits options = 0 ) APPLE_KEXT_OVERRIDE;
/*! @function prepare
@abstract Prepare the memory for an I/O transfer.
@param forDirection The direction of the I/O just completed, or kIODirectionNone for the direction specified by the memory descriptor.
@result An IOReturn code. */
- virtual IOReturn prepare(IODirection forDirection = kIODirectionNone);
+ virtual IOReturn prepare(IODirection forDirection = kIODirectionNone) APPLE_KEXT_OVERRIDE;
/*! @function complete
@abstract Complete processing of the memory after an I/O transfer finishes.
@param forDirection The direction of the I/O just completed, or kIODirectionNone for the direction specified by the memory descriptor.
@result An IOReturn code. */
- virtual IOReturn complete(IODirection forDirection = kIODirectionNone);
-
-/*! @function readBytes
- @abstract Copy data from the memory descriptor's buffer to the specified buffer.
- @discussion This method copies data from the memory descriptor's memory at the given offset, to the caller's buffer.
- @param offset A byte offset into the memory descriptor's memory.
- @param bytes The caller supplied buffer to copy the data to.
- @param withLength The length of the data to copy.
- @result The number of bytes copied, zero will be returned if the specified offset is beyond the length of the descriptor. */
-
- virtual IOByteCount readBytes( IOByteCount offset,
- void * bytes,
- IOByteCount withLength );
-
-/*! @function writeBytes
- @abstract Copy data to the memory descriptor's buffer from the specified buffer.
- @discussion This method copies data to the memory descriptor's memory at the given offset, from the caller's buffer.
- @param offset A byte offset into the memory descriptor's memory.
- @param bytes The caller supplied buffer to copy the data from.
- @param withLength The length of the data to copy.
- @result The number of bytes copied, zero will be returned if the specified offset is beyond the length of the descriptor. */
-
- virtual IOByteCount writeBytes( IOByteCount offset,
- const void * bytes,
- IOByteCount withLength );
-
- virtual IOPhysicalAddress getSourceSegment(IOByteCount offset,
- IOByteCount * length);
+ virtual IOReturn complete(IODirection forDirection = kIODirectionNone) APPLE_KEXT_OVERRIDE;
+
+ virtual IOReturn setPurgeable(IOOptionBits newState, IOOptionBits * oldState) APPLE_KEXT_OVERRIDE;
+
+/*! @function getPageCounts
+ @abstract Retrieve the number of resident and/or dirty pages encompassed by an IOMemoryDescriptor.
+ @discussion This method returns the number of resident and/or dirty pages encompassed by an IOMemoryDescriptor.
+ @param residentPageCount - If non-null, a pointer to a byte count that will return the number of resident pages encompassed by this IOMemoryDescriptor.
+ @param dirtyPageCount - If non-null, a pointer to a byte count that will return the number of dirty pages encompassed by this IOMemoryDescriptor.
+ @result An IOReturn code. */
+
+ IOReturn getPageCounts(IOByteCount * residentPageCount,
+ IOByteCount * dirtyPageCount);
+
+#define IOMULTIMEMORYDESCRIPTOR_SUPPORTS_GETPAGECOUNTS 1
+
+private:
+ virtual IOReturn doMap(vm_map_t addressMap,
+ IOVirtualAddress * atAddress,
+ IOOptionBits options,
+ IOByteCount sourceOffset = 0,
+ IOByteCount length = 0 ) APPLE_KEXT_OVERRIDE;
};
#endif /* !_IOMULTIMEMORYDESCRIPTOR_H */
projects / apple / xnu.git / blobdiff