aboutsummaryrefslogtreecommitdiff
path: root/kernel/memory/paging.dats
blob: 84a8bf49880f34c9e5f8eb5cffa12f77fef841cd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#define ATS_DYNLOADFLAG 0

#include "kernel/prelude/kernel_prelude.hats"

staload UN = "prelude/SATS/unsafe.sats"

staload "./paging.sats"
staload "./frame.sats"
staload "lib/SATS/valid.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

(* implement test()  = let *)
(* in *)
(*   (5,true) *)
(* end *)