1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _MOTOROLA_PGALLOC_H
3 #define _MOTOROLA_PGALLOC_H
4 
5 #include <asm/tlb.h>
6 #include <asm/tlbflush.h>
7 
8 extern pmd_t *get_pointer_table(void);
9 extern int free_pointer_table(pmd_t *);
10 
11 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
12 {
13 	pte_t *pte;
14 
15 	pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
16 	if (pte) {
17 		__flush_page_to_ram(pte);
18 		flush_tlb_kernel_page(pte);
19 		nocache_page(pte);
20 	}
21 
22 	return pte;
23 }
24 
25 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
26 {
27 	cache_page(pte);
28 	free_page((unsigned long) pte);
29 }
30 
31 static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
32 {
33 	struct page *page;
34 	pte_t *pte;
35 
36 	page = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0);
37 	if(!page)
38 		return NULL;
39 	if (!pgtable_pte_page_ctor(page)) {
40 		__free_page(page);
41 		return NULL;
42 	}
43 
44 	pte = kmap(page);
45 	__flush_page_to_ram(pte);
46 	flush_tlb_kernel_page(pte);
47 	nocache_page(pte);
48 	kunmap(page);
49 	return page;
50 }
51 
52 static inline void pte_free(struct mm_struct *mm, pgtable_t page)
53 {
54 	pgtable_pte_page_dtor(page);
55 	cache_page(kmap(page));
56 	kunmap(page);
57 	__free_page(page);
58 }
59 
60 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
61 				  unsigned long address)
62 {
63 	pgtable_pte_page_dtor(page);
64 	cache_page(kmap(page));
65 	kunmap(page);
66 	__free_page(page);
67 }
68 
69 
70 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
71 {
72 	return get_pointer_table();
73 }
74 
75 static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
76 {
77 	return free_pointer_table(pmd);
78 }
79 
80 static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
81 				 unsigned long address)
82 {
83 	return free_pointer_table(pmd);
84 }
85 
86 
87 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
88 {
89 	pmd_free(mm, (pmd_t *)pgd);
90 }
91 
92 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
93 {
94 	return (pgd_t *)get_pointer_table();
95 }
96 
97 
98 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
99 {
100 	pmd_set(pmd, pte);
101 }
102 
103 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
104 {
105 	pmd_set(pmd, page_address(page));
106 }
107 #define pmd_pgtable(pmd) pmd_page(pmd)
108 
109 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
110 {
111 	pgd_set(pgd, pmd);
112 }
113 
114 #endif /* _MOTOROLA_PGALLOC_H */
115