LXR linux/arch/powerpc/include/asm/pgtable-types.h

   1#ifndef _ASM_POWERPC_PGTABLE_TYPES_H
   2#define _ASM_POWERPC_PGTABLE_TYPES_H
   3
   4#ifdef CONFIG_STRICT_MM_TYPECHECKS
   5/* These are used to make use of C type-checking. */
   6
   7/* PTE level */
   8typedef struct { pte_basic_t pte; } pte_t;
   9#define __pte(x)        ((pte_t) { (x) })
  10static inline pte_basic_t pte_val(pte_t x)
  11{
  12        return x.pte;
  13}
  14
  15/* PMD level */
  16#ifdef CONFIG_PPC64
  17typedef struct { unsigned long pmd; } pmd_t;
  18#define __pmd(x)        ((pmd_t) { (x) })
  19static inline unsigned long pmd_val(pmd_t x)
  20{
  21        return x.pmd;
  22}
  23
  24/*
  25 * 64 bit hash always use 4 level table. Everybody else use 4 level
  26 * only for 4K page size.
  27 */
  28#if defined(CONFIG_PPC_BOOK3S_64) || !defined(CONFIG_PPC_64K_PAGES)
  29typedef struct { unsigned long pud; } pud_t;
  30#define __pud(x)        ((pud_t) { (x) })
  31static inline unsigned long pud_val(pud_t x)
  32{
  33        return x.pud;
  34}
  35#endif /* CONFIG_PPC_BOOK3S_64 || !CONFIG_PPC_64K_PAGES */
  36#endif /* CONFIG_PPC64 */
  37
  38/* PGD level */
  39typedef struct { unsigned long pgd; } pgd_t;
  40#define __pgd(x)        ((pgd_t) { (x) })
  41static inline unsigned long pgd_val(pgd_t x)
  42{
  43        return x.pgd;
  44}
  45
  46/* Page protection bits */
  47typedef struct { unsigned long pgprot; } pgprot_t;
  48#define pgprot_val(x)   ((x).pgprot)
  49#define __pgprot(x)     ((pgprot_t) { (x) })
  50
  51#else
  52
  53/*
  54 * .. while these make it easier on the compiler
  55 */
  56
  57typedef pte_basic_t pte_t;
  58#define __pte(x)        (x)
  59static inline pte_basic_t pte_val(pte_t pte)
  60{
  61        return pte;
  62}
  63
  64#ifdef CONFIG_PPC64
  65typedef unsigned long pmd_t;
  66#define __pmd(x)        (x)
  67static inline unsigned long pmd_val(pmd_t pmd)
  68{
  69        return pmd;
  70}
  71
  72#if defined(CONFIG_PPC_BOOK3S_64) || !defined(CONFIG_PPC_64K_PAGES)
  73typedef unsigned long pud_t;
  74#define __pud(x)        (x)
  75static inline unsigned long pud_val(pud_t pud)
  76{
  77        return pud;
  78}
  79#endif /* CONFIG_PPC_BOOK3S_64 || !CONFIG_PPC_64K_PAGES */
  80#endif /* CONFIG_PPC64 */
  81
  82typedef unsigned long pgd_t;
  83#define __pgd(x)        (x)
  84static inline unsigned long pgd_val(pgd_t pgd)
  85{
  86        return pgd;
  87}
  88
  89typedef unsigned long pgprot_t;
  90#define pgprot_val(x)   (x)
  91#define __pgprot(x)     (x)
  92
  93#endif /* CONFIG_STRICT_MM_TYPECHECKS */
  94/*
  95 * With hash config 64k pages additionally define a bigger "real PTE" type that
  96 * gathers the "second half" part of the PTE for pseudo 64k pages
  97 */
  98#if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_STD_MMU_64)
  99typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
 100#else
 101typedef struct { pte_t pte; } real_pte_t;
 102#endif
 103#endif /* _ASM_POWERPC_PGTABLE_TYPES_H */
 104