/*
 * Copyright (c) 2026, Chloe M.
 * Provided under the BSD-3 clause.
 *
 * Description:  Virtual memory management
 * Author:       Chloe M.
 */

#ifndef _MM_VM_H_
#define _MM_VM_H_ 1

#include <ke/bpal.h>

/*
 * Virtual memory allocation region. This is outside the
 * higher half direct map and thus cannot be converted with
 * PMA_TO_VMA() / VMA_TO_PMA()
 */
#define VALLOC_BASE 0xFFFF804000000000

/*
 * Used to convert physical addresses to virtual addresses
 * and vice versa only when they are within the higher half
 * direct map.
 */
#define PMA_TO_VMA(PMA) \
    PTR_OFFSET((VOID *)PMA, KeBpalLoadBase())
#define VMA_TO_PMA(VMA) \
    (UPTR)PTR_NOFFSET(VMA, KeBpalLoadBase())

#endif  /* !_MM_VM_H_ */