Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef __ASM_SH_PGALLOC_H
2#define __ASM_SH_PGALLOC_H
3
4#include <linux/threads.h>
5#include <linux/slab.h>
6#include <linux/mm.h>
7
8#define pgd_quicklist ((unsigned long *)0)
9#define pmd_quicklist ((unsigned long *)0)
10#define pte_quicklist ((unsigned long *)0)
11#define pgtable_cache_size 0L
12
13#define pmd_populate_kernel(mm, pmd, pte) \
14 set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
15
16static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
17 struct page *pte)
18{
19 set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
20}
21
22/*
23 * Allocate and free page tables.
24 */
25static inline pgd_t *pgd_alloc(struct mm_struct *mm)
26{
27 unsigned int pgd_size = (USER_PTRS_PER_PGD * sizeof(pgd_t));
28 pgd_t *pgd = (pgd_t *)kmalloc(pgd_size, GFP_KERNEL);
29
30 if (pgd)
31 memset(pgd, 0, pgd_size);
32
33 return pgd;
34}
35
36static inline void pgd_free(pgd_t *pgd)
37{
38 kfree(pgd);
39}
40
41static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
42 unsigned long address)
43{
44 pte_t *pte;
45
46 pte = (pte_t *) __get_free_page(GFP_KERNEL | __GFP_REPEAT | __GFP_ZERO);
47
48 return pte;
49}
50
51static inline struct page *pte_alloc_one(struct mm_struct *mm,
52 unsigned long address)
53{
54 struct page *pte;
55
56 pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, 0);
57
58 return pte;
59}
60
61static inline void pte_free_kernel(pte_t *pte)
62{
63 free_page((unsigned long)pte);
64}
65
66static inline void pte_free(struct page *pte)
67{
68 __free_page(pte);
69}
70
71#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
72
73/*
74 * allocating and freeing a pmd is trivial: the 1-entry pmd is
75 * inside the pgd, so has no extra memory associated with it.
76 */
77
78#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
79#define pmd_free(x) do { } while (0)
80#define __pmd_free_tlb(tlb,x) do { } while (0)
81#define pgd_populate(mm, pmd, pte) BUG()
82#define check_pgt_cache() do { } while (0)
83
84#ifdef CONFIG_CPU_SH4
85#define PG_mapped PG_arch_1
86#endif
87
88#endif /* __ASM_SH_PGALLOC_H */