1/* pgalloc.h: Page allocation routines for FRV
2 *
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Derived from:
12 *	include/asm-m68knommu/pgalloc.h
13 *	include/asm-i386/pgalloc.h
14 */
15#ifndef _ASM_PGALLOC_H
16#define _ASM_PGALLOC_H
17
18#include <asm/setup.h>
19#include <asm/virtconvert.h>
20
21#ifdef CONFIG_MMU
22
23#define pmd_populate_kernel(mm, pmd, pte) __set_pmd(pmd, __pa(pte) | _PAGE_TABLE)
24#define pmd_populate(MM, PMD, PAGE)						\
25do {										\
26	__set_pmd((PMD), page_to_pfn(PAGE) << PAGE_SHIFT | _PAGE_TABLE);	\
27} while(0)
28#define pmd_pgtable(pmd) pmd_page(pmd)
29
30/*
31 * Allocate and free page tables.
32 */
33
34extern pgd_t *pgd_alloc(struct mm_struct *);
35extern void pgd_free(struct mm_struct *mm, pgd_t *);
36
37extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
38
39extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
40
41static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
42{
43	free_page((unsigned long)pte);
44}
45
46static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
47{
48	pgtable_page_dtor(pte);
49	__free_page(pte);
50}
51
52#define __pte_free_tlb(tlb,pte,address)			\
53do {							\
54	pgtable_page_dtor(pte);				\
55	tlb_remove_page((tlb),(pte));			\
56} while (0)
57
58/*
59 * allocating and freeing a pmd is trivial: the 1-entry pmd is
60 * inside the pgd, so has no extra memory associated with it.
61 * (In the PAE case we free the pmds as part of the pgd.)
62 */
63#define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *) 2); })
64#define pmd_free(mm, x)			do { } while (0)
65#define __pmd_free_tlb(tlb,x,a)		do { } while (0)
66
67#endif /* CONFIG_MMU */
68
69#endif /* _ASM_PGALLOC_H */
70