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#define ATS_DYNLOADFLAG 0
#include "kernel/prelude/kernel_prelude.hats"
staload UN = "prelude/SATS/unsafe.sats"
staload "./paging.sats"
staload "./frame.sats"
assume entry_type = uint64
val zero = u2uint64(0u)
implement is_unused(entry) = entry = zero
implement set_unused(entry) = entry := zero
implement flag_contains(entry,flag) =
(entry land $UN.cast{uint64}(1 << (case+ flag of
| PRESENT() => 0
| WRITABLE() => 1
| USER_ACCESSIBLE() => 2
| WRITE_THROUGH() => 3
| NO_CACHE() => 4
| ACCESSED() => 5
| DIRTY() => 6
| HUGE_PAGE() => 7
| GLOBAL() => 8
| NO_EXECUTE() => 63
))) != zero
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