Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_SCORE_PGALLOC_H
2#define _ASM_SCORE_PGALLOC_H
3
4#include <linux/mm.h>
5#include <linux/highmem.h>
6static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
7 pte_t *pte)
8{
9 set_pmd(pmd, __pmd((unsigned long)pte));
10}
11
12static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
13 pgtable_t pte)
14{
15 set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
16}
17
18#define pmd_pgtable(pmd) pmd_page(pmd)
19
20static inline pgd_t *pgd_alloc(struct mm_struct *mm)
21{
22 pgd_t *ret, *init;
23
24 ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);
25 if (ret) {
26 init = pgd_offset(&init_mm, 0UL);
27 pgd_init((unsigned long)ret);
28 memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,
29 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
30 }
31
32 return ret;
33}
34
35static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
36{
37 free_pages((unsigned long)pgd, PGD_ORDER);
38}
39
40static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
41 unsigned long address)
42{
43 pte_t *pte;
44
45 pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, PTE_ORDER);
46
47 return pte;
48}
49
50static inline struct page *pte_alloc_one(struct mm_struct *mm,
51 unsigned long address)
52{
53 struct page *pte;
54
55 pte = alloc_pages(GFP_KERNEL, PTE_ORDER);
56 if (!pte)
57 return NULL;
58 clear_highpage(pte);
59 if (!pgtable_page_ctor(pte)) {
60 __free_page(pte);
61 return NULL;
62 }
63 return pte;
64}
65
66static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
67{
68 free_pages((unsigned long)pte, PTE_ORDER);
69}
70
71static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
72{
73 pgtable_page_dtor(pte);
74 __free_pages(pte, PTE_ORDER);
75}
76
77#define __pte_free_tlb(tlb, pte, buf) \
78do { \
79 pgtable_page_dtor(pte); \
80 tlb_remove_page((tlb), pte); \
81} while (0)
82
83#define check_pgt_cache() do {} while (0)
84
85#endif /* _ASM_SCORE_PGALLOC_H */