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
15extern const char bad_pmd_string[];
16
17#define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); })
18
19
20static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
21{
22        free_page((unsigned long) pte);
23}
24
25static inline void pte_free(struct mm_struct *mm, pgtable_t page)
26{
27	pgtable_page_dtor(page);
28        __free_page(page);
29}
30
31#define __pte_free_tlb(tlb,pte,addr)			\
32do {							\
33	pgtable_page_dtor(pte);				\
34	tlb_remove_page((tlb), pte);			\
35} while (0)
36
37static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
38					  unsigned long address)
39{
40	unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT);
41
42	if (!page)
43		return NULL;
44
45	memset((void *)page, 0, PAGE_SIZE);
46	return (pte_t *) (page);
47}
48
49static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
50					unsigned long address)
51{
52        struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
53
54	if (page == NULL)
55		return NULL;
56
57	clear_highpage(page);
58	if (!pgtable_page_ctor(page)) {
59		__free_page(page);
60		return NULL;
61	}
62	return page;
63
64}
65
66static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
67{
68	pmd_val(*pmd) = __pa((unsigned long)pte);
69}
70
71static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
72{
73	pmd_val(*pmd) = __pa((unsigned long)page_address(page));
74}
75#define pmd_pgtable(pmd) pmd_page(pmd)
76
77/*
78 * allocating and freeing a pmd is trivial: the 1-entry pmd is
79 * inside the pgd, so has no extra memory associated with it.
80 */
81#define pmd_free(mm, x)			do { } while (0)
82#define __pmd_free_tlb(tlb, x, addr)	do { } while (0)
83
84static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
85{
86        free_page((unsigned long) pgd);
87}
88
89static inline pgd_t * pgd_alloc(struct mm_struct *mm)
90{
91     pgd_t *new_pgd;
92
93     new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
94     memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
95     memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
96     return new_pgd;
97}
98
99#define pgd_populate(mm, pmd, pte) BUG()
100
101#endif /* SUN3_PGALLOC_H */
102