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 */
   8 typedef struct { pte_basic_t pte; } pte_t;
   9 #define __pte(x)        ((pte_t) { (x) })
  10 static inline pte_basic_t pte_val(pte_t x)
  11 {
  12         return x.pte;
  13 }
  14
  15 /* PMD level */
  16 #ifdef CONFIG_PPC64
  17 typedef struct { unsigned long pmd; } pmd_t;
  18 #define __pmd(x)        ((pmd_t) { (x) })
  19 static 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)
  29 typedef struct { unsigned long pud; } pud_t;
  30 #define __pud(x)        ((pud_t) { (x) })
  31 static 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 */
  39 typedef struct { unsigned long pgd; } pgd_t;
  40 #define __pgd(x)        ((pgd_t) { (x) })
  41 static inline unsigned long pgd_val(pgd_t x)
  42 {
  43         return x.pgd;
  44 }
  45
  46 /* Page protection bits */
  47 typedef 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
  57 typedef pte_basic_t pte_t;
  58 #define __pte(x)        (x)
  59 static inline pte_basic_t pte_val(pte_t pte)
  60 {
  61         return pte;
  62 }
  63
  64 #ifdef CONFIG_PPC64
  65 typedef unsigned long pmd_t;
  66 #define __pmd(x)        (x)
  67 static 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)
  73 typedef unsigned long pud_t;
  74 #define __pud(x)        (x)
  75 static 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
  82 typedef unsigned long pgd_t;
  83 #define __pgd(x)        (x)
  84 static inline unsigned long pgd_val(pgd_t pgd)
  85 {
  86         return pgd;
  87 }
  88
  89 typedef 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)
  99 typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
 100 #else
 101 typedef struct { pte_t pte; } real_pte_t;
 102 #endif
 103 #endif /* _ASM_POWERPC_PGTABLE_TYPES_H */