1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _SPARC64_PGALLOC_H
3 #define _SPARC64_PGALLOC_H
4
5 #include <linux/kernel.h>
6 #include <linux/sched.h>
7 #include <linux/mm.h>
8 #include <linux/slab.h>
9
10 #include <asm/spitfire.h>
11 #include <asm/cpudata.h>
12 #include <asm/cacheflush.h>
13 #include <asm/page.h>
14
15 /* Page table allocation/freeing. */
16
17 extern struct kmem_cache *pgtable_cache;
18
19 static inline void __p4d_populate(p4d_t *p4d, pud_t *pud)
20 {
21 p4d_set(p4d, pud);
22 }
23
24 #define p4d_populate(MM, P4D, PUD) __p4d_populate(P4D, PUD)
25
26 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
27 {
28 return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
29 }
30
31 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
32 {
33 kmem_cache_free(pgtable_cache, pgd);
34 }
35
36 static inline void __pud_populate(pud_t *pud, pmd_t *pmd)
37 {
38 pud_set(pud, pmd);
39 }
40
41 #define pud_populate(MM, PUD, PMD) __pud_populate(PUD, PMD)
42
43 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
44 {
45 return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
46 }
47
48 static inline void pud_free(struct mm_struct *mm, pud_t *pud)
49 {
50 kmem_cache_free(pgtable_cache, pud);
51 }
52
53 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
54 {
55 return kmem_cache_alloc(pgtable_cache, GFP_KERNEL);
56 }
57
58 static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
59 {
60 kmem_cache_free(pgtable_cache, pmd);
61 }
62
63 pte_t *pte_alloc_one_kernel(struct mm_struct *mm);
64 pgtable_t pte_alloc_one(struct mm_struct *mm);
65 void pte_free_kernel(struct mm_struct *mm, pte_t *pte);
66 void pte_free(struct mm_struct *mm, pgtable_t ptepage);
67
68 /* arch use pte_free_defer() implementation in arch/sparc/mm/init_64.c */
69 #define pte_free_defer pte_free_defer
70 void pte_free_defer(struct mm_struct *mm, pgtable_t pgtable);
71
72 #define pmd_populate_kernel(MM, PMD, PTE) pmd_set(MM, PMD, PTE)
73 #define pmd_populate(MM, PMD, PTE) pmd_set(MM, PMD, PTE)
74
75 void pgtable_free(void *table, bool is_page);
76
77 #ifdef CONFIG_SMP
78
79 struct mmu_gather;
80 void tlb_remove_table(struct mmu_gather *, void *);
81
82 static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
83 {
84 unsigned long pgf = (unsigned long)table;
85 if (is_page)
86 pgf |= 0x1UL;
87 tlb_remove_table(tlb, (void *)pgf);
88 }
89
90 static inline void __tlb_remove_table(void *_table)
91 {
92 void *table = (void *)((unsigned long)_table & ~0x1UL);
93 bool is_page = false;
94
95 if ((unsigned long)_table & 0x1UL)
96 is_page = true;
97 pgtable_free(table, is_page);
98 }
99 #else /* CONFIG_SMP */
100 static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page)
101 {
102 pgtable_free(table, is_page);
103 }
104 #endif /* !CONFIG_SMP */
105
106 static inline void __pte_free_tlb(struct mmu_gather *tlb, pte_t *pte,
107 unsigned long address)
108 {
109 pgtable_free_tlb(tlb, pte, true);
110 }
111
112 #define __pmd_free_tlb(tlb, pmd, addr) \
113 pgtable_free_tlb(tlb, pmd, false)
114
115 #define __pud_free_tlb(tlb, pud, addr) \
116 pgtable_free_tlb(tlb, pud, false)
117
118 #endif /* _SPARC64_PGALLOC_H */
119
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