#define ENTRY_COUNT 512

staload "kernel/memory/frame.sats"
staload "lib/SATS/valid.sats"

abstype vaddr_type(l:addr) = ptr(l)
typedef vaddr(l:addr) = vaddr_type(l)

abst@ype entry_type = uint64
typedef entry_t = entry_type

typedef page_t = @{
  num = size_t
}

datatype entry_flag = 
  | PRESENT
  | WRITABLE
  | USER_ACCESSIBLE 
  | WRITE_THROUGH 
  | NO_CACHE 
  | ACCESSED 
  | DIRTY 
  | HUGE_PAGE 
  | GLOBAL 
  | NO_EXECUTE 

fn is_unused(entry_t) : bool
fn set_unused(&entry_t) : void

fn contains_flag(entry_t,entry_flag) : bool
fn pointed_frame(entry_t) : Valid frame_t

fn entry_set{n:nat}(&entry_t,frame_t,&(@[entry_flag][n]),size_t n) : void