1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
4*4882a593Smuzhiyun * Copyright 2003 PathScale, Inc.
5*4882a593Smuzhiyun * Derived from include/asm-i386/pgtable.h
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #ifndef __UM_PGTABLE_2LEVEL_H
9*4882a593Smuzhiyun #define __UM_PGTABLE_2LEVEL_H
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <asm-generic/pgtable-nopmd.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun /* PGDIR_SHIFT determines what a third-level page table entry can map */
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #define PGDIR_SHIFT 22
16*4882a593Smuzhiyun #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
17*4882a593Smuzhiyun #define PGDIR_MASK (~(PGDIR_SIZE-1))
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun /*
20*4882a593Smuzhiyun * entries per page directory level: the i386 is two-level, so
21*4882a593Smuzhiyun * we don't really have any PMD directory physically.
22*4882a593Smuzhiyun */
23*4882a593Smuzhiyun #define PTRS_PER_PTE 1024
24*4882a593Smuzhiyun #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
25*4882a593Smuzhiyun #define PTRS_PER_PGD 1024
26*4882a593Smuzhiyun #define FIRST_USER_ADDRESS 0UL
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun #define pte_ERROR(e) \
29*4882a593Smuzhiyun printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), \
30*4882a593Smuzhiyun pte_val(e))
31*4882a593Smuzhiyun #define pgd_ERROR(e) \
32*4882a593Smuzhiyun printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \
33*4882a593Smuzhiyun pgd_val(e))
34*4882a593Smuzhiyun
pgd_newpage(pgd_t pgd)35*4882a593Smuzhiyun static inline int pgd_newpage(pgd_t pgd) { return 0; }
pgd_mkuptodate(pgd_t pgd)36*4882a593Smuzhiyun static inline void pgd_mkuptodate(pgd_t pgd) { }
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun #define pte_pfn(x) phys_to_pfn(pte_val(x))
41*4882a593Smuzhiyun #define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot))
42*4882a593Smuzhiyun #define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun #endif
45