1 /* 2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) 3 * Copyright 2003 PathScale, Inc. 4 * Derived from include/asm-i386/pgtable.h 5 * Licensed under the GPL 6 */ 7 8 #ifndef __UM_PGTABLE_2LEVEL_H 9 #define __UM_PGTABLE_2LEVEL_H 10 11 #define __ARCH_USE_5LEVEL_HACK 12 #include <asm-generic/pgtable-nopmd.h> 13 14 /* PGDIR_SHIFT determines what a third-level page table entry can map */ 15 16 #define PGDIR_SHIFT 22 17 #define PGDIR_SIZE (1UL << PGDIR_SHIFT) 18 #define PGDIR_MASK (~(PGDIR_SIZE-1)) 19 20 /* 21 * entries per page directory level: the i386 is two-level, so 22 * we don't really have any PMD directory physically. 23 */ 24 #define PTRS_PER_PTE 1024 25 #define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE) 26 #define PTRS_PER_PGD 1024 27 #define FIRST_USER_ADDRESS 0UL 28 29 #define pte_ERROR(e) \ 30 printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), \ 31 pte_val(e)) 32 #define pgd_ERROR(e) \ 33 printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \ 34 pgd_val(e)) 35 36 static inline int pgd_newpage(pgd_t pgd) { return 0; } 37 static inline void pgd_mkuptodate(pgd_t pgd) { } 38 39 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval)) 40 41 #define pte_pfn(x) phys_to_pfn(pte_val(x)) 42 #define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot)) 43 #define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot)) 44 45 #endif 46