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A comment on Booting to Rust. Parent comment

Re:Booting to Rust by ivanca on Monday November 18, 2013 @10:50PM (#6759160)
"64-bit UEFI understands long mode, which allows applications in the pre-boot execution environment to have direct access to all of the memory using 64-bit addressing."

Source: http://en.wikipedia.org/wiki/Unified_Extensible_Firmware_Int...

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Re:Booting to Rust by haberman on Monday November 18, 2013 @11:36PM (#6759296)
I believe that "long mode" is just the name for the native 64-bit mode of these processors; ie. what you'd normally run 64-bit Linux under, with the MMU enabled.
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