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

INCLUDED FROM

DEFINITIONS

1. pte_val
2. pmd_val
3. pud_val
4. pgd_val
5. pte_xchg
6. hpd_val

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_PGTABLE_TYPES_H
   3 #define _ASM_POWERPC_PGTABLE_TYPES_H
   4 
   5 /* PTE level */
   6 #if defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES)
   7 typedef struct { pte_basic_t pte, pte1, pte2, pte3; } pte_t;
   8 #else
   9 typedef struct { pte_basic_t pte; } pte_t;
  10 #endif
  11 #define __pte(x)        ((pte_t) { (x) })
  12 static inline pte_basic_t pte_val(pte_t x)
  13 {
  14         return x.pte;
  15 }
  16 
  17 /* PMD level */
  18 #ifdef CONFIG_PPC64
  19 typedef struct { unsigned long pmd; } pmd_t;
  20 #define __pmd(x)        ((pmd_t) { (x) })
  21 static inline unsigned long pmd_val(pmd_t x)
  22 {
  23         return x.pmd;
  24 }
  25 
  26 /* 64 bit always use 4 level table. */
  27 typedef struct { unsigned long pud; } pud_t;
  28 #define __pud(x)        ((pud_t) { (x) })
  29 static inline unsigned long pud_val(pud_t x)
  30 {
  31         return x.pud;
  32 }
  33 #endif /* CONFIG_PPC64 */
  34 
  35 /* PGD level */
  36 typedef struct { unsigned long pgd; } pgd_t;
  37 #define __pgd(x)        ((pgd_t) { (x) })
  38 static inline unsigned long pgd_val(pgd_t x)
  39 {
  40         return x.pgd;
  41 }
  42 
  43 /* Page protection bits */
  44 typedef struct { unsigned long pgprot; } pgprot_t;
  45 #define pgprot_val(x)   ((x).pgprot)
  46 #define __pgprot(x)     ((pgprot_t) { (x) })
  47 
  48 /*
  49  * With hash config 64k pages additionally define a bigger "real PTE" type that
  50  * gathers the "second half" part of the PTE for pseudo 64k pages
  51  */
  52 #ifdef CONFIG_PPC_64K_PAGES
  53 typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
  54 #else
  55 typedef struct { pte_t pte; } real_pte_t;
  56 #endif
  57 
  58 #ifdef CONFIG_PPC_BOOK3S_64
  59 #include <asm/cmpxchg.h>
  60 
  61 static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new)
  62 {
  63         unsigned long *p = (unsigned long *)ptep;
  64 
  65         /* See comment in switch_mm_irqs_off() */
  66         return pte_val(old) == __cmpxchg_u64(p, pte_val(old), pte_val(new));
  67 }
  68 #endif
  69 
  70 typedef struct { unsigned long pd; } hugepd_t;
  71 #define __hugepd(x) ((hugepd_t) { (x) })
  72 static inline unsigned long hpd_val(hugepd_t x)
  73 {
  74         return x.pd;
  75 }
  76 
  77 #endif /* _ASM_POWERPC_PGTABLE_TYPES_H */