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