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