#ifndef KERNEL_X86_64_VM_H_
#define KERNEL_X86_64_VM_H_

/* kernel higher-half base virtual address. */
#define VM_KERNEL_VOFFSET 0xFFFFFFFF80000000

/* direct page-mapping region.
   NOTE that these are the maximum bounds of this region.
   the actual size depends on the amount of physical
   memory present. */
#define VM_PAGEMAP_BASE   0xFFFF888000000000
#define VM_PAGEMAP_LIMIT  0xFFFFC87FFFFFFFFF

#define VM_PAGE_SIZE      0x1000
#define VM_PAGE_MASK      (VM_PAGE_SIZE - 1)
#define VM_PAGE_SHIFT     12

#define VM_PAGE_MIN_ORDER VM_PAGE_4K
#define VM_PAGE_MAX_ORDER VM_PAGE_8M

#define VM_ZONE_MIN       VM_ZONE_DMA
#define VM_ZONE_MAX       VM_ZONE_NORMAL

#define VM_USER_BASE      0x0000000000100000
#define VM_USER_LIMIT     0x00007fffffffffff

#define VM_KERNEL_BASE    0XFFFF800000000000
#define VM_KERNEL_LIMIT   0XFFFFFFFFFFFFFFFF

#endif