1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
4 * Copyright 2003 PathScale, Inc.
5 * Derived from include/asm-i386/pgtable.h
6 */
7
8#ifndef __UM_PGTABLE_2LEVEL_H
9#define __UM_PGTABLE_2LEVEL_H
10
11#include <asm-generic/pgtable-nopmd.h>
12
13/* PGDIR_SHIFT determines what a third-level page table entry can map */
14
15#define PGDIR_SHIFT	22
16#define PGDIR_SIZE	(1UL << PGDIR_SHIFT)
17#define PGDIR_MASK	(~(PGDIR_SIZE-1))
18
19/*
20 * entries per page directory level: the i386 is two-level, so
21 * we don't really have any PMD directory physically.
22 */
23#define PTRS_PER_PTE	1024
24#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
25#define PTRS_PER_PGD	1024
26
27#define pte_ERROR(e) \
28        printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), \
29	       pte_val(e))
30#define pgd_ERROR(e) \
31        printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \
32	       pgd_val(e))
33
34static inline int pgd_newpage(pgd_t pgd)	{ return 0; }
35static inline void pgd_mkuptodate(pgd_t pgd)	{ }
36
37#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
38
39#define pte_pfn(x) phys_to_pfn(pte_val(x))
40#define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot))
41#define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))
42
43#endif
44