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_REPEAT|__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 = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
33 	pte_t *pte;
34 
35 	if(!page)
36 		return NULL;
37 
38 	pte = kmap(page);
39 	__flush_page_to_ram(pte);
40 	flush_tlb_kernel_page(pte);
41 	nocache_page(pte);
42 	kunmap(page);
43 	pgtable_page_ctor(page);
44 	return page;
45 }
46 
47 static inline void pte_free(struct mm_struct *mm, pgtable_t page)
48 {
49 	pgtable_page_dtor(page);
50 	cache_page(kmap(page));
51 	kunmap(page);
52 	__free_page(page);
53 }
54 
55 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
56 				  unsigned long address)
57 {
58 	pgtable_page_dtor(page);
59 	cache_page(kmap(page));
60 	kunmap(page);
61 	__free_page(page);
62 }
63 
64 
65 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
66 {
67 	return get_pointer_table();
68 }
69 
70 static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd)
71 {
72 	return free_pointer_table(pmd);
73 }
74 
75 static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
76 				 unsigned long address)
77 {
78 	return free_pointer_table(pmd);
79 }
80 
81 
82 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
83 {
84 	pmd_free(mm, (pmd_t *)pgd);
85 }
86 
87 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
88 {
89 	return (pgd_t *)get_pointer_table();
90 }
91 
92 
93 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
94 {
95 	pmd_set(pmd, pte);
96 }
97 
98 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
99 {
100 	pmd_set(pmd, page_address(page));
101 }
102 #define pmd_pgtable(pmd) pmd_page(pmd)
103 
104 static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
105 {
106 	pgd_set(pgd, pmd);
107 }
108 
109 #endif /* _MOTOROLA_PGALLOC_H */
110