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 */
8 typedef struct { __be64 pte; } pte_t;
9 #define __pte(x) ((pte_t) { cpu_to_be64(x) })
10 #define __pte_raw(x) ((pte_t) { (x) })
pte_val(pte_t x)11 static inline unsigned long pte_val(pte_t x)
12 {
13 return be64_to_cpu(x.pte);
14 }
15
pte_raw(pte_t x)16 static inline __be64 pte_raw(pte_t x)
17 {
18 return x.pte;
19 }
20
21 /* PMD level */
22 #ifdef CONFIG_PPC64
23 typedef struct { __be64 pmd; } pmd_t;
24 #define __pmd(x) ((pmd_t) { cpu_to_be64(x) })
25 #define __pmd_raw(x) ((pmd_t) { (x) })
pmd_val(pmd_t x)26 static inline unsigned long pmd_val(pmd_t x)
27 {
28 return be64_to_cpu(x.pmd);
29 }
30
pmd_raw(pmd_t x)31 static inline __be64 pmd_raw(pmd_t x)
32 {
33 return x.pmd;
34 }
35
36 /* 64 bit always use 4 level table. */
37 typedef struct { __be64 pud; } pud_t;
38 #define __pud(x) ((pud_t) { cpu_to_be64(x) })
39 #define __pud_raw(x) ((pud_t) { (x) })
pud_val(pud_t x)40 static inline unsigned long pud_val(pud_t x)
41 {
42 return be64_to_cpu(x.pud);
43 }
44
pud_raw(pud_t x)45 static inline __be64 pud_raw(pud_t x)
46 {
47 return x.pud;
48 }
49
50 #endif /* CONFIG_PPC64 */
51
52 /* PGD level */
53 typedef struct { __be64 pgd; } pgd_t;
54 #define __pgd(x) ((pgd_t) { cpu_to_be64(x) })
55 #define __pgd_raw(x) ((pgd_t) { (x) })
pgd_val(pgd_t x)56 static inline unsigned long pgd_val(pgd_t x)
57 {
58 return be64_to_cpu(x.pgd);
59 }
60
pgd_raw(pgd_t x)61 static inline __be64 pgd_raw(pgd_t x)
62 {
63 return x.pgd;
64 }
65
66 /* Page protection bits */
67 typedef 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
76 typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
77 #else
78 typedef struct { pte_t pte; } real_pte_t;
79 #endif
80
pte_xchg(pte_t * ptep,pte_t old,pte_t new)81 static 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
pmd_xchg(pmd_t * pmdp,pmd_t old,pmd_t new)93 static 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
105 typedef struct { __be64 pdbe; } hugepd_t;
106 #define __hugepd(x) ((hugepd_t) { cpu_to_be64(x) })
107
hpd_val(hugepd_t x)108 static 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