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
  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