/* * This file is subject to the terms and conditions of the GNU General Public * License.  See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1994 - 2001, 2003 by Ralf Baechle * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc. */#ifndef _ASM_PGALLOC_H#define _ASM_PGALLOC_H #include <linux/config.h>#include <linux/highmem.h>#include <linux/mm.h> static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,	pte_t *pte){	set_pmd(pmd, __pmd((unsigned long)pte));} static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,	struct page *pte){	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));} /* * Initialize a new pgd / pmd table with invalid pointers. */extern void pgd_init(unsigned long page);extern void pmd_init(unsigned long page, unsigned long pagetable); static inline pgd_t *pgd_alloc(struct mm_struct *mm){	pgd_t *ret, *init; 	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);	if (ret) {		init = pgd_offset(&init_mm, 0);		pgd_init((unsigned long)ret);		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,		       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));	} 	return ret;} static inline void pgd_free(pgd_t *pgd){	free_pages((unsigned long)pgd, PGD_ORDER);} static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,	unsigned long address){	pte_t *pte; 	pte = (pte_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO, PTE_ORDER); 	return pte;} static inline struct page *pte_alloc_one(struct mm_struct *mm,	unsigned long address){	struct page *pte; 	pte = alloc_pages(GFP_KERNEL | __GFP_REPEAT, PTE_ORDER);	if (pte)		clear_highpage(pte); 	return pte;} static inline void pte_free_kernel(pte_t *pte){	free_pages((unsigned long)pte, PTE_ORDER);} static inline void pte_free(struct page *pte){	__free_pages(pte, PTE_ORDER);} #define __pte_free_tlb(tlb,pte)		tlb_remove_page((tlb),(pte)) #ifdef CONFIG_32BIT#define pgd_populate(mm, pmd, pte)	BUG() /* * allocating and freeing a pmd is trivial: the 1-entry pmd is * inside the pgd, so has no extra memory associated with it. */#define pmd_alloc_one(mm, addr)		({ BUG(); ((pmd_t *)2); })#define pmd_free(x)			do { } while (0)#define __pmd_free_tlb(tlb,x)		do { } while (0)#endif #ifdef CONFIG_64BIT #define pgd_populate(mm, pgd, pmd)	set_pgd(pgd, __pgd(pmd)) static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address){	pmd_t *pmd; 	pmd = (pmd_t *) __get_free_pages(GFP_KERNEL|__GFP_REPEAT, PMD_ORDER);	if (pmd)		pmd_init((unsigned long)pmd, (unsigned long)invalid_pte_table);	return pmd;} static inline void pmd_free(pmd_t *pmd){	free_pages((unsigned long)pmd, PMD_ORDER);} #define __pmd_free_tlb(tlb,x)	pmd_free(x) #endif #define check_pgt_cache()	do { } while (0) #endif /* _ASM_PGALLOC_H */