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Linux kernel mirror (for testing)
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linux
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
36static inline int pgd_newpage(pgd_t pgd) { return 0; }
37static 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