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11#ifndef _XTENSA_PGALLOC_H
12#define _XTENSA_PGALLOC_H
13
14#ifdef __KERNEL__
15
16#include <linux/highmem.h>
17#include <linux/slab.h>
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23
24#define pmd_populate_kernel(mm, pmdp, ptep) \
25 (pmd_val(*(pmdp)) = ((unsigned long)ptep))
26#define pmd_populate(mm, pmdp, page) \
27 (pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
28#define pmd_pgtable(pmd) pmd_page(pmd)
29
30static inline pgd_t*
31pgd_alloc(struct mm_struct *mm)
32{
33 return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);
34}
35
36static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
37{
38 free_page((unsigned long)pgd);
39}
40
41static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
42 unsigned long address)
43{
44 pte_t *ptep;
45 int i;
46
47 ptep = (pte_t *)__get_free_page(GFP_KERNEL);
48 if (!ptep)
49 return NULL;
50 for (i = 0; i < 1024; i++)
51 pte_clear(NULL, 0, ptep + i);
52 return ptep;
53}
54
55static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
56 unsigned long addr)
57{
58 pte_t *pte;
59 struct page *page;
60
61 pte = pte_alloc_one_kernel(mm, addr);
62 if (!pte)
63 return NULL;
64 page = virt_to_page(pte);
65 if (!pgtable_page_ctor(page)) {
66 __free_page(page);
67 return NULL;
68 }
69 return page;
70}
71
72static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
73{
74 free_page((unsigned long)pte);
75}
76
77static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
78{
79 pgtable_page_dtor(pte);
80 __free_page(pte);
81}
82#define pmd_pgtable(pmd) pmd_page(pmd)
83
84#endif
85#endif
86