Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1#ifndef M68K_MCF_PGALLOC_H
2#define M68K_MCF_PGALLOC_H
3
4#include <asm/tlb.h>
5#include <asm/tlbflush.h>
6
7extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
8{
9 free_page((unsigned long) pte);
10}
11
12extern const char bad_pmd_string[];
13
14extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
15 unsigned long address)
16{
17 unsigned long page = __get_free_page(GFP_DMA|__GFP_REPEAT);
18
19 if (!page)
20 return NULL;
21
22 memset((void *)page, 0, PAGE_SIZE);
23 return (pte_t *) (page);
24}
25
26extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
27{
28 return (pmd_t *) pgd;
29}
30
31#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
32#define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
33
34#define pte_alloc_one_fast(mm, addr) pte_alloc_one(mm, addr)
35
36#define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \
37 (unsigned long)(page_address(page)))
38
39#define pmd_populate_kernel(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
40
41#define pmd_pgtable(pmd) pmd_page(pmd)
42
43static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
44 unsigned long address)
45{
46 __free_page(page);
47}
48
49#define __pmd_free_tlb(tlb, pmd, address) do { } while (0)
50
51static inline struct page *pte_alloc_one(struct mm_struct *mm,
52 unsigned long address)
53{
54 struct page *page = alloc_pages(GFP_DMA|__GFP_REPEAT, 0);
55 pte_t *pte;
56
57 if (!page)
58 return NULL;
59
60 pte = kmap(page);
61 if (pte) {
62 clear_page(pte);
63 __flush_page_to_ram(pte);
64 flush_tlb_kernel_page(pte);
65 nocache_page(pte);
66 }
67 kunmap(page);
68
69 return page;
70}
71
72extern inline void pte_free(struct mm_struct *mm, struct page *page)
73{
74 __free_page(page);
75}
76
77/*
78 * In our implementation, each pgd entry contains 1 pmd that is never allocated
79 * or freed. pgd_present is always 1, so this should never be called. -NL
80 */
81#define pmd_free(mm, pmd) BUG()
82
83static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
84{
85 free_page((unsigned long) pgd);
86}
87
88static inline pgd_t *pgd_alloc(struct mm_struct *mm)
89{
90 pgd_t *new_pgd;
91
92 new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
93 if (!new_pgd)
94 return NULL;
95 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
96 memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
97 return new_pgd;
98}
99
100#define pgd_populate(mm, pmd, pte) BUG()
101
102#endif /* M68K_MCF_PGALLOC_H */