root/arch/powerpc/include/asm/pgtable-be-types.h

INCLUDED FROM

DEFINITIONS

1. pte_val
2. pte_raw
3. pmd_val
4. pmd_raw
5. pud_val
6. pud_raw
7. pgd_val
8. pgd_raw
9. pte_xchg
10. pmd_xchg
11. hpd_val

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_PGTABLE_BE_TYPES_H
   3 #define _ASM_POWERPC_PGTABLE_BE_TYPES_H
   4 
   5 #include <asm/cmpxchg.h>
   6 
   7 /* PTE level */
   8 typedef struct { __be64 pte; } pte_t;
   9 #define __pte(x)        ((pte_t) { cpu_to_be64(x) })
  10 #define __pte_raw(x)    ((pte_t) { (x) })
  11 static inline unsigned long pte_val(pte_t x)
  12 {
  13         return be64_to_cpu(x.pte);
  14 }
  15 
  16 static inline __be64 pte_raw(pte_t x)
  17 {
  18         return x.pte;
  19 }
  20 
  21 /* PMD level */
  22 #ifdef CONFIG_PPC64
  23 typedef struct { __be64 pmd; } pmd_t;
  24 #define __pmd(x)        ((pmd_t) { cpu_to_be64(x) })
  25 #define __pmd_raw(x)    ((pmd_t) { (x) })
  26 static inline unsigned long pmd_val(pmd_t x)
  27 {
  28         return be64_to_cpu(x.pmd);
  29 }
  30 
  31 static inline __be64 pmd_raw(pmd_t x)
  32 {
  33         return x.pmd;
  34 }
  35 
  36 /* 64 bit always use 4 level table. */
  37 typedef struct { __be64 pud; } pud_t;
  38 #define __pud(x)        ((pud_t) { cpu_to_be64(x) })
  39 #define __pud_raw(x)    ((pud_t) { (x) })
  40 static inline unsigned long pud_val(pud_t x)
  41 {
  42         return be64_to_cpu(x.pud);
  43 }
  44 
  45 static inline __be64 pud_raw(pud_t x)
  46 {
  47         return x.pud;
  48 }
  49 
  50 #endif /* CONFIG_PPC64 */
  51 
  52 /* PGD level */
  53 typedef struct { __be64 pgd; } pgd_t;
  54 #define __pgd(x)        ((pgd_t) { cpu_to_be64(x) })
  55 #define __pgd_raw(x)    ((pgd_t) { (x) })
  56 static inline unsigned long pgd_val(pgd_t x)
  57 {
  58         return be64_to_cpu(x.pgd);
  59 }
  60 
  61 static inline __be64 pgd_raw(pgd_t x)
  62 {
  63         return x.pgd;
  64 }
  65 
  66 /* Page protection bits */
  67 typedef struct { unsigned long pgprot; } pgprot_t;
  68 #define pgprot_val(x)   ((x).pgprot)
  69 #define __pgprot(x)     ((pgprot_t) { (x) })
  70 
  71 /*
  72  * With hash config 64k pages additionally define a bigger "real PTE" type that
  73  * gathers the "second half" part of the PTE for pseudo 64k pages
  74  */
  75 #ifdef CONFIG_PPC_64K_PAGES
  76 typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
  77 #else
  78 typedef struct { pte_t pte; } real_pte_t;
  79 #endif
  80 
  81 static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new)
  82 {
  83         unsigned long *p = (unsigned long *)ptep;
  84         __be64 prev;
  85 
  86         /* See comment in switch_mm_irqs_off() */
  87         prev = (__force __be64)__cmpxchg_u64(p, (__force unsigned long)pte_raw(old),
  88                                              (__force unsigned long)pte_raw(new));
  89 
  90         return pte_raw(old) == prev;
  91 }
  92 
  93 static inline bool pmd_xchg(pmd_t *pmdp, pmd_t old, pmd_t new)
  94 {
  95         unsigned long *p = (unsigned long *)pmdp;
  96         __be64 prev;
  97 
  98         prev = (__force __be64)__cmpxchg_u64(p, (__force unsigned long)pmd_raw(old),
  99                                              (__force unsigned long)pmd_raw(new));
 100 
 101         return pmd_raw(old) == prev;
 102 }
 103 
 104 typedef struct { __be64 pdbe; } hugepd_t;
 105 #define __hugepd(x) ((hugepd_t) { cpu_to_be64(x) })
 106 
 107 static inline unsigned long hpd_val(hugepd_t x)
 108 {
 109         return be64_to_cpu(x.pdbe);
 110 }
 111 
 112 #endif /* _ASM_POWERPC_PGTABLE_BE_TYPES_H */