1#ifndef _ASM_M32R_PGALLOC_H
2#define _ASM_M32R_PGALLOC_H
3
4#include <linux/mm.h>
5
6#include <asm/io.h>
7
8#define pmd_populate_kernel(mm, pmd, pte)	\
9	set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
10
11static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
12	pgtable_t pte)
13{
14	set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
15}
16#define pmd_pgtable(pmd) pmd_page(pmd)
17
18/*
19 * Allocate and free page tables.
20 */
21static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
22{
23	pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
24
25	return pgd;
26}
27
28static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
29{
30	free_page((unsigned long)pgd);
31}
32
33static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
34	unsigned long address)
35{
36	pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
37
38	return pte;
39}
40
41static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
42	unsigned long address)
43{
44	struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
45
46	if (!pte)
47		return NULL;
48	if (!pgtable_page_ctor(pte)) {
49		__free_page(pte);
50		return NULL;
51	}
52	return pte;
53}
54
55static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
56{
57	free_page((unsigned long)pte);
58}
59
60static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
61{
62	pgtable_page_dtor(pte);
63	__free_page(pte);
64}
65
66#define __pte_free_tlb(tlb, pte, addr)	pte_free((tlb)->mm, (pte))
67
68/*
69 * allocating and freeing a pmd is trivial: the 1-entry pmd is
70 * inside the pgd, so has no extra memory associated with it.
71 * (In the PAE case we free the pmds as part of the pgd.)
72 */
73
74#define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *)2); })
75#define pmd_free(mm, x)			do { } while (0)
76#define __pmd_free_tlb(tlb, x, addr)	do { } while (0)
77#define pgd_populate(mm, pmd, pte)	BUG()
78
79#define check_pgt_cache()	do { } while (0)
80
81#endif /* _ASM_M32R_PGALLOC_H */
82