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