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#ifndef _ASM_X86_PAGE_H_
#define _ASM_X86_PAGE_H_
/*
* Copyright (C) 2016, Red Hat Inc, Alexander Gordeev <agordeev@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.
*/
#include <linux/const.h>
#include <bitops.h>
#define PAGE_SHIFT 12
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#ifndef __ASSEMBLY__
#ifdef __x86_64__
#define LARGE_PAGE_SIZE (512 * PAGE_SIZE)
#else
#define LARGE_PAGE_SIZE (1024 * PAGE_SIZE)
#endif
#define PT_PRESENT_MASK (1ull << 0)
#define PT_WRITABLE_MASK (1ull << 1)
#define PT_USER_MASK (1ull << 2)
#define PT_ACCESSED_MASK (1ull << 5)
#define PT_DIRTY_MASK (1ull << 6)
#define PT_PAGE_SIZE_MASK (1ull << 7)
#define PT64_NX_MASK (1ull << 63)
#define PT_ADDR_MASK GENMASK_ULL(51, 12)
#ifdef __x86_64__
#define PAGE_LEVEL 4
#define PGDIR_WIDTH 9
#define PGDIR_MASK 511
#else
#define PAGE_LEVEL 2
#define PGDIR_WIDTH 10
#define PGDIR_MASK 1023
#endif
#define PGDIR_BITS(lvl) (((lvl) - 1) * PGDIR_WIDTH + PAGE_SHIFT)
#define PGDIR_OFFSET(va, lvl) (((va) >> PGDIR_BITS(lvl)) & PGDIR_MASK)
#endif /* !__ASSEMBLY__ */
#endif