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 /*
37 * 64 bit hash always use 4 level table. Everybody else use 4 level
38 * only for 4K page size.
39 */
40 #if defined(CONFIG_PPC_BOOK3S_64) || !defined(CONFIG_PPC_64K_PAGES)
41 typedef struct { __be64 pud; } pud_t;
42 #define __pud(x) ((pud_t) { cpu_to_be64(x) })
43 #define __pud_raw(x) ((pud_t) { (x) })
pud_val(pud_t x)44 static inline unsigned long pud_val(pud_t x)
45 {
46 return be64_to_cpu(x.pud);
47 }
48
pud_raw(pud_t x)49 static inline __be64 pud_raw(pud_t x)
50 {
51 return x.pud;
52 }
53
54 #endif /* CONFIG_PPC_BOOK3S_64 || !CONFIG_PPC_64K_PAGES */
55 #endif /* CONFIG_PPC64 */
56
57 /* PGD level */
58 typedef struct { __be64 pgd; } pgd_t;
59 #define __pgd(x) ((pgd_t) { cpu_to_be64(x) })
60 #define __pgd_raw(x) ((pgd_t) { (x) })
pgd_val(pgd_t x)61 static inline unsigned long pgd_val(pgd_t x)
62 {
63 return be64_to_cpu(x.pgd);
64 }
65
pgd_raw(pgd_t x)66 static inline __be64 pgd_raw(pgd_t x)
67 {
68 return x.pgd;
69 }
70
71 /* Page protection bits */
72 typedef struct { unsigned long pgprot; } pgprot_t;
73 #define pgprot_val(x) ((x).pgprot)
74 #define __pgprot(x) ((pgprot_t) { (x) })
75
76 /*
77 * With hash config 64k pages additionally define a bigger "real PTE" type that
78 * gathers the "second half" part of the PTE for pseudo 64k pages
79 */
80 #if defined(CONFIG_PPC_64K_PAGES) && defined(CONFIG_PPC_BOOK3S_64)
81 typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
82 #else
83 typedef struct { pte_t pte; } real_pte_t;
84 #endif
85
pte_xchg(pte_t * ptep,pte_t old,pte_t new)86 static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new)
87 {
88 unsigned long *p = (unsigned long *)ptep;
89 __be64 prev;
90
91 /* See comment in switch_mm_irqs_off() */
92 prev = (__force __be64)__cmpxchg_u64(p, (__force unsigned long)pte_raw(old),
93 (__force unsigned long)pte_raw(new));
94
95 return pte_raw(old) == prev;
96 }
97
pmd_xchg(pmd_t * pmdp,pmd_t old,pmd_t new)98 static inline bool pmd_xchg(pmd_t *pmdp, pmd_t old, pmd_t new)
99 {
100 unsigned long *p = (unsigned long *)pmdp;
101 __be64 prev;
102
103 prev = (__force __be64)__cmpxchg_u64(p, (__force unsigned long)pmd_raw(old),
104 (__force unsigned long)pmd_raw(new));
105
106 return pmd_raw(old) == prev;
107 }
108
109 typedef struct { __be64 pdbe; } hugepd_t;
110 #define __hugepd(x) ((hugepd_t) { cpu_to_be64(x) })
111
hpd_val(hugepd_t x)112 static inline unsigned long hpd_val(hugepd_t x)
113 {
114 return be64_to_cpu(x.pdbe);
115 }
116
117 #endif /* _ASM_POWERPC_PGTABLE_BE_TYPES_H */
118
