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 static inline int pgd_needsync(pgd_t pgd) { return 0; } 28 static inline void pgd_mkuptodate(pgd_t pgd) { } 29 30 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) 31 32 #define pte_pfn(x) phys_to_pfn(pte_val(x)) 33 #define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot)) 34 35 #endif 36