arch/avr32/include/asm/pgtable-2level.h

   1 /*
   2  * Copyright (C) 2004-2006 Atmel Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #ifndef __ASM_AVR32_PGTABLE_2LEVEL_H
   9 #define __ASM_AVR32_PGTABLE_2LEVEL_H
  10
  11 #include <asm-generic/pgtable-nopmd.h>
  12
  13 /*
  14  * Traditional 2-level paging structure
  15  */
  16 #define PGDIR_SHIFT     22
  17 #define PTRS_PER_PGD    1024
  18
  19 #define PTRS_PER_PTE    1024
  20
  21 #ifndef __ASSEMBLY__
  22 #define pte_ERROR(e) \
  23         printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
  24 #define pgd_ERROR(e) \
  25         printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
  26
  27 /*
  28  * Certain architectures need to do special things when PTEs
  29  * within a page table are directly modified.  Thus, the following
  30  * hook is made available.
  31  */
  32 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
  33 #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep, pteval)
  34
  35 /*
  36  * (pmds are folded into pgds so this doesn't get actually called,
  37  * but the define is needed for a generic inline function.)
  38  */
  39 #define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
  40
  41 #define pte_pfn(x)              ((unsigned long)(((x).pte >> PAGE_SHIFT)))
  42 #define pfn_pte(pfn, prot)      __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
  43 #define pfn_pmd(pfn, prot)      __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
  44
  45 #endif /* !__ASSEMBLY__ */
  46
  47 #endif /* __ASM_AVR32_PGTABLE_2LEVEL_H */