1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_PGTABLE_TYPES_H
3 #define _ASM_POWERPC_PGTABLE_TYPES_H
4 
5 #if defined(__CHECKER__) || !defined(CONFIG_PPC32)
6 #define STRICT_MM_TYPECHECKS
7 #endif
8 
9 /* PTE level */
10 #if defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES)
11 typedef struct { pte_basic_t pte, pte1, pte2, pte3; } pte_t;
12 #elif defined(STRICT_MM_TYPECHECKS)
13 typedef struct { pte_basic_t pte; } pte_t;
14 #else
15 typedef pte_basic_t pte_t;
16 #endif
17 
18 #if defined(STRICT_MM_TYPECHECKS) || \
19     (defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES))
20 #define __pte(x)	((pte_t) { (x) })
pte_val(pte_t x)21 static inline pte_basic_t pte_val(pte_t x)
22 {
23 	return x.pte;
24 }
25 #else
26 #define __pte(x)	((pte_t)(x))
pte_val(pte_t x)27 static inline pte_basic_t pte_val(pte_t x)
28 {
29 	return x;
30 }
31 #endif
32 
33 /* PMD level */
34 #ifdef CONFIG_PPC64
35 typedef struct { unsigned long pmd; } pmd_t;
36 #define __pmd(x)	((pmd_t) { (x) })
pmd_val(pmd_t x)37 static inline unsigned long pmd_val(pmd_t x)
38 {
39 	return x.pmd;
40 }
41 
42 /* 64 bit always use 4 level table. */
43 typedef struct { unsigned long pud; } pud_t;
44 #define __pud(x)	((pud_t) { (x) })
pud_val(pud_t x)45 static inline unsigned long pud_val(pud_t x)
46 {
47 	return x.pud;
48 }
49 #endif /* CONFIG_PPC64 */
50 
51 /* PGD level */
52 typedef struct { unsigned long pgd; } pgd_t;
53 #define __pgd(x)	((pgd_t) { (x) })
pgd_val(pgd_t x)54 static inline unsigned long pgd_val(pgd_t x)
55 {
56 	return x.pgd;
57 }
58 
59 /* Page protection bits */
60 typedef struct { unsigned long pgprot; } pgprot_t;
61 #define pgprot_val(x)	((x).pgprot)
62 #define __pgprot(x)	((pgprot_t) { (x) })
63 
64 /*
65  * With hash config 64k pages additionally define a bigger "real PTE" type that
66  * gathers the "second half" part of the PTE for pseudo 64k pages
67  */
68 #ifdef CONFIG_PPC_64K_PAGES
69 typedef struct { pte_t pte; unsigned long hidx; } real_pte_t;
70 #else
71 typedef struct { pte_t pte; } real_pte_t;
72 #endif
73 
74 #ifdef CONFIG_PPC_BOOK3S_64
75 #include <asm/cmpxchg.h>
76 
pte_xchg(pte_t * ptep,pte_t old,pte_t new)77 static inline bool pte_xchg(pte_t *ptep, pte_t old, pte_t new)
78 {
79 	unsigned long *p = (unsigned long *)ptep;
80 
81 	/* See comment in switch_mm_irqs_off() */
82 	return pte_val(old) == __cmpxchg_u64(p, pte_val(old), pte_val(new));
83 }
84 #endif
85 
86 typedef struct { unsigned long pd; } hugepd_t;
87 #define __hugepd(x) ((hugepd_t) { (x) })
hpd_val(hugepd_t x)88 static inline unsigned long hpd_val(hugepd_t x)
89 {
90 	return x.pd;
91 }
92 
93 #endif /* _ASM_POWERPC_PGTABLE_TYPES_H */
94