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1/* sun3_pgalloc.h --
2 * reorganization around 2.3.39, routines moved from sun3_pgtable.h
3 *
4 *
5 * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam)
6 *
7 * moved 1/26/2000 Sam Creasey
8 */
9
10#ifndef _SUN3_PGALLOC_H
11#define _SUN3_PGALLOC_H
12
13#include <asm/tlb.h>
14
15/* FIXME - when we get this compiling */
16/* erm, now that it's compiling, what do we do with it? */
17#define _KERNPG_TABLE 0
18
19extern const char bad_pmd_string[];
20
21#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
22
23
24static inline void pte_free_kernel(pte_t * pte)
25{
26 free_page((unsigned long) pte);
27}
28
29static inline void pte_free(struct page *page)
30{
31 __free_page(page);
32}
33
34#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
35
36static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
37 unsigned long address)
38{
39 unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT);
40
41 if (!page)
42 return NULL;
43
44 memset((void *)page, 0, PAGE_SIZE);
45 return (pte_t *) (page);
46}
47
48static inline struct page *pte_alloc_one(struct mm_struct *mm,
49 unsigned long address)
50{
51 struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
52
53 if (page == NULL)
54 return NULL;
55
56 clear_highpage(page);
57 return page;
58
59}
60
61static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
62{
63 pmd_val(*pmd) = __pa((unsigned long)pte);
64}
65
66static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *page)
67{
68 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
69}
70
71/*
72 * allocating and freeing a pmd is trivial: the 1-entry pmd is
73 * inside the pgd, so has no extra memory associated with it.
74 */
75#define pmd_free(x) do { } while (0)
76#define __pmd_free_tlb(tlb, x) do { } while (0)
77
78static inline void pgd_free(pgd_t * pgd)
79{
80 free_page((unsigned long) pgd);
81}
82
83static inline pgd_t * pgd_alloc(struct mm_struct *mm)
84{
85 pgd_t *new_pgd;
86
87 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
88 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
89 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
90 return new_pgd;
91}
92
93#define pgd_populate(mm, pmd, pte) BUG()
94
95#endif /* SUN3_PGALLOC_H */