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HDK Technical Reference

Large memory support (DDI 8)

DDI 8 allows DMA access to any part of memory, including that above 4GB. Earlier DDI versions prevented drivers from accessing memory above 4GB because physical addresses were exposed as the 32-bit unsigned paddr_t data type.

In DDI 8, all references to physical addresses are eliminated except for the following two forms:


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OpenServer 6 and UnixWare (SVR5) HDK - June 2005