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

   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)
   7typedef struct { pte_basic_t pte, pte1, pte2, pte3; } pte_t;
   8#else
   9typedef struct { pte_basic_t pte; } pte_t;
  10#endif
  11#define __pte(x)        ((pte_t) { (x) })
  12static inline pte_basic_t pte_val(pte_t x)
  13{
  14        return x.pte;
  15}
  16
  17/* PMD level */
  18#ifdef CONFIG_PPC64
  19typedef struct { unsigned long pmd; } pmd_t;
  20#define __pmd(x)        ((pmd_t) { (x) })
  21static inline unsigned long pmd_val(pmd_t x)
  22{
  23        return x.pmd;
  24}
  25
  26/* 64 bit always use 4 level table. */
  27typedef struct { unsigned long pud; } pud_t;
  28#define __pud(x)        ((pud_t) { (x) })
  29static inline unsigned long pud_val(pud_t x)
  30{
  31        return x.pud;
  32}
  33#endif /* CONFIG_PPC64 */
  34
  35/* PGD level */
  36typedef struct { unsigned long pgd; } pgd_t;
  37#define __pgd(x)        ((pgd_t) { (x) })
  38static inline unsigned long pgd_val(pgd_t x)
  39{
  40        return x.pgd;
  41}
  42
  43/* Page protection bits */
  44typedef 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
  53typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
  54#else
  55typedef struct { pte_t pte; } real_pte_t;
  56#endif
  57
  58#ifdef CONFIG_PPC_BOOK3S_64
  59#include <asm/cmpxchg.h>
  60
  61static 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
  70typedef struct { unsigned long pd; } hugepd_t;
  71#define __hugepd(x) ((hugepd_t) { (x) })
  72static inline unsigned long hpd_val(hugepd_t x)
  73{
  74        return x.pd;
  75}
  76
  77#endif /* _ASM_POWERPC_PGTABLE_TYPES_H */
  78