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
104#ifdef CONFIG_ARCH_HAS_HUGEPD
105typedef struct { __be64 pdbe; } hugepd_t;
106#define __hugepd(x) ((hugepd_t) { cpu_to_be64(x) })
107
108static inline unsigned long hpd_val(hugepd_t x)
109{
110	return be64_to_cpu(x.pdbe);
111}
112#endif
113
114#endif /* _ASM_POWERPC_PGTABLE_BE_TYPES_H */