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All 64-bit paging schemes support at least 1GB "gigapages". Use these to map I/O devices instead of 2MB "megapages". This reduces the number of consumed page table entries, increases the visual similarity of I/O remapped addresses to the underlying physical addresses, and opens up the possibility of reusing the code to create the coherent DMA map of the 32-bit address space. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE README File Quick start guide: cd src make For any more detailed instructions, see http://ipxe.org