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
29/*
30 * Allocate and free page tables.
31 */
32
33extern pgd_t *pgd_alloc(struct mm_struct *);
34extern void pgd_free(pgd_t *);
35
36extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
37
38extern struct page *pte_alloc_one(struct mm_struct *, unsigned long);
39
40static inline void pte_free_kernel(pte_t *pte)
41{
42	free_page((unsigned long)pte);
43}
44
45static inline void pte_free(struct page *pte)
46{
47	__free_page(pte);
48}
49
50#define __pte_free_tlb(tlb,pte)		tlb_remove_page((tlb),(pte))
51
52/*
53 * allocating and freeing a pmd is trivial: the 1-entry pmd is
54 * inside the pgd, so has no extra memory associated with it.
55 * (In the PAE case we free the pmds as part of the pgd.)
56 */
57#define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *) 2); })
58#define pmd_free(x)			do { } while (0)
59#define __pmd_free_tlb(tlb,x)		do { } while (0)
60
61#endif /* CONFIG_MMU */
62
63#endif /* _ASM_PGALLOC_H */
64