LXR linux/arch/um/include/asm/pgtable-2level.h

   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
  46