1/* MN10300 Page and page table/directory allocation 2 * 3 * Copyright (C) 2007 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 Licence 8 * as published by the Free Software Foundation; either version 9 * 2 of the Licence, or (at your option) any later version. 10 */ 11#ifndef _ASM_PGALLOC_H 12#define _ASM_PGALLOC_H 13 14#include <asm/processor.h> 15#include <asm/page.h> 16#include <linux/threads.h> 17#include <linux/mm.h> /* for struct page */ 18 19struct mm_struct; 20struct page; 21 22/* attach a page table to a PMD entry */ 23#define pmd_populate_kernel(mm, pmd, pte) \ 24 set_pmd(pmd, __pmd(__pa(pte) | _PAGE_TABLE)) 25 26static inline 27void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte) 28{ 29 set_pmd(pmd, __pmd((page_to_pfn(pte) << PAGE_SHIFT) | _PAGE_TABLE)); 30} 31#define pmd_pgtable(pmd) pmd_page(pmd) 32 33/* 34 * Allocate and free page tables. 35 */ 36 37extern pgd_t *pgd_alloc(struct mm_struct *); 38extern void pgd_free(struct mm_struct *, pgd_t *); 39 40extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long); 41extern struct page *pte_alloc_one(struct mm_struct *, unsigned long); 42 43static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) 44{ 45 free_page((unsigned long) pte); 46} 47 48static inline void pte_free(struct mm_struct *mm, struct page *pte) 49{ 50 __free_page(pte); 51} 52 53 54#define __pte_free_tlb(tlb, pte, addr) tlb_remove_page((tlb), (pte)) 55 56#endif /* _ASM_PGALLOC_H */ 57