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

   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 */
   8typedef struct { __be64 pte; } pte_t;
   9#define __pte(x)        ((pte_t) { cpu_to_be64(x) })
  10#define __pte_raw(x)    ((pte_t) { (x) })
  11static inline unsigned long pte_val(pte_t x)
  12{
  13        return be64_to_cpu(x.pte);
  14}
  15
  16static inline __be64 pte_raw(pte_t x)
  17{
  18        return x.pte;
  19}
  20
  21/* PMD level */
  22#ifdef CONFIG_PPC64
  23typedef struct { __be64 pmd; } pmd_t;
  24#define __pmd(x)        ((pmd_t) { cpu_to_be64(x) })
  25#define __pmd_raw(x)    ((pmd_t) { (x) })
  26static inline unsigned long pmd_val(pmd_t x)
  27{
  28        return be64_to_cpu(x.pmd);
  29}
  30
  31static inline __be64 pmd_raw(pmd_t x)
  32{
  33        return x.pmd;
  34}
  35
  36/* 64 bit always use 4 level table. */
  37typedef struct { __be64 pud; } pud_t;
  38#define __pud(x)        ((pud_t) { cpu_to_be64(x) })
  39#define __pud_raw(x)    ((pud_t) { (x) })
  40static inline unsigned long pud_val(pud_t x)
  41{
  42        return be64_to_cpu(x.pud);
  43}
  44
  45static inline __be64 pud_raw(pud_t x)
  46{
  47        return x.pud;
  48}
  49
  50#endif /* CONFIG_PPC64 */
  51
  52/* PGD level */
  53typedef struct { __be64 pgd; } pgd_t;
  54#define __pgd(x)        ((pgd_t) { cpu_to_be64(x) })
  55#define __pgd_raw(x)    ((pgd_t) { (x) })
  56static inline unsigned long pgd_val(pgd_t x)
  57{
  58        return be64_to_cpu(x.pgd);
  59}
  60
  61static inline __be64 pgd_raw(pgd_t x)
  62{
  63        return x.pgd;
  64}
  65
  66/* Page protection bits */
  67typedef 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
  76typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
  77#else
  78typedef struct { pte_t pte; } real_pte_t;
  79#endif
  80
  81static 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
  93static 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
 104typedef struct { __be64 pdbe; } hugepd_t;
 105#define __hugepd(x) ((hugepd_t) { cpu_to_be64(x) })
 106
 107static 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 */
 113