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19#ifndef __ASM_OPENRISC_PGALLOC_H
20#define __ASM_OPENRISC_PGALLOC_H
21
22#include <asm/page.h>
23#include <linux/threads.h>
24#include <linux/mm.h>
25#include <linux/memblock.h>
26#include <linux/bootmem.h>
27
28extern int mem_init_done;
29
30#define pmd_populate_kernel(mm, pmd, pte) \
31 set_pmd(pmd, __pmd(_KERNPG_TABLE + __pa(pte)))
32
33static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
34 struct page *pte)
35{
36 set_pmd(pmd, __pmd(_KERNPG_TABLE +
37 ((unsigned long)page_to_pfn(pte) <<
38 (unsigned long) PAGE_SHIFT)));
39}
40
41
42
43
44static inline pgd_t *pgd_alloc(struct mm_struct *mm)
45{
46 pgd_t *ret = (pgd_t *)__get_free_page(GFP_KERNEL);
47
48 if (ret) {
49 memset(ret, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
50 memcpy(ret + USER_PTRS_PER_PGD,
51 swapper_pg_dir + USER_PTRS_PER_PGD,
52 (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
53
54 }
55 return ret;
56}
57
58#if 0
59
60
61
62
63extern inline pgd_t *pgd_alloc(struct mm_struct *mm)
64{
65 return (pgd_t *)get_zeroed_page(GFP_KERNEL);
66}
67#endif
68
69static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
70{
71 free_page((unsigned long)pgd);
72}
73
74extern pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address);
75
76static inline struct page *pte_alloc_one(struct mm_struct *mm,
77 unsigned long address)
78{
79 struct page *pte;
80 pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
81 if (pte)
82 clear_page(page_address(pte));
83 return pte;
84}
85
86static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
87{
88 free_page((unsigned long)pte);
89}
90
91static inline void pte_free(struct mm_struct *mm, struct page *pte)
92{
93 __free_page(pte);
94}
95
96
97#define __pte_free_tlb(tlb, pte, addr) tlb_remove_page((tlb), (pte))
98#define pmd_pgtable(pmd) pmd_page(pmd)
99
100#define check_pgt_cache() do { } while (0)
101
102#endif
103