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#include "./prelude/kernel_prelude.hats"
#define ATS_DYNLOADFLAG 0
staload "./multiboot.sats"
staload UN = "prelude/SATS/unsafe.sats"
local
var boot_info : boot_info_t
in
implement boot_info_init (p : Ptr1) = let
extern praxi __assert{l:addr} (ptr: ptr (l)): vtakeout0 (boot_info_t@l) // takeout proof UNSAFE:
prval (pf, fpf) = __assert (addr@boot_info)
val total_size = $UN.ptr0_get<uint>(p)
fun loop {l : agz} (pf : !boot_info_t@l | boot_p : ptr l , p : ptr): void = let
val type = $UN.ptr0_get<uint>(p)
val size = $UN.ptr0_get<uint>(ptr_succ<uint>(p))
val next = (if (size % 8u != 0) then size + 8u - (size % 8u) else size) : uint
in
case+ type of
| 6u => (
boot_p->memory_map := $UN.ptr0_get<memory_map_t>(p);
boot_p->memory_map.entries := ptr_add<uint>(p,4)
)
| _ => ();
if (type != 0u) then
loop(pf | boot_p, ptr_add<uint8>(p, next))
end
in
boot_info.total_size := total_size;
loop(pf | addr@boot_info, ptr_add<uint32>(p,2));
(pf , fpf | addr@boot_info)
end
end
extern castfn ui2sz (n : uint) : size_t
implement get_memory_mappings_n(p) = let
val size = p.2->memory_map.tag.size
val n_entries = (if(size >= 16u) then (size - 16u) / p.2->memory_map.entry_size else 0u) : uint
in
ui2sz n_entries
end
// TODO: here use optional datatype (fix runtime )
implement get_memory_mapping(p,n) = let
val size = p.2->memory_map.tag.size
val n_entries = ui2sz (if(size >= 16u) then (size - 16u) / p.2->memory_map.entry_size else 0u)
in
assertloc(n < n_entries);
$UN.ptr0_get<memory_entry_t>(ptr_add<memory_map_t>(p.2->memory_map.entries,n))
end
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