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 */
115