/* * include/asm-xtensa/pgalloc.h * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Copyright (C) 2001-2007 Tensilica Inc. */ #ifndef _XTENSA_PGALLOC_H#define _XTENSA_PGALLOC_H #ifdef __KERNEL__ #include <linux/highmem.h> /* * 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_populate_kernel(mm, pmdp, ptep)				     \	(pmd_val(*(pmdp)) = ((unsigned long)ptep))#define pmd_populate(mm, pmdp, page)					     \	(pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))#define pmd_pgtable(pmd) pmd_page(pmd) static inline pgd_t*pgd_alloc(struct mm_struct *mm){	return (pgd_t*) __get_free_pages(GFP_KERNEL | __GFP_ZERO, PGD_ORDER);} static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd){	free_page((unsigned long)pgd);} /* Use a slab cache for the pte pages (see also sparc64 implementation) */ extern struct kmem_cache *pgtable_cache; static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, 					 unsigned long address){	return kmem_cache_alloc(pgtable_cache, GFP_KERNEL|__GFP_REPEAT);} static inline pgtable_t pte_alloc_one(struct mm_struct *mm,					unsigned long addr){	struct page *page; 	page = virt_to_page(pte_alloc_one_kernel(mm, addr));	pgtable_page_ctor(page);	return page;} static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte){	kmem_cache_free(pgtable_cache, pte);} static inline void pte_free(struct mm_struct *mm, pgtable_t pte){	pgtable_page_dtor(pte);	kmem_cache_free(pgtable_cache, page_address(pte));}#define pmd_pgtable(pmd) pmd_page(pmd) #endif /* __KERNEL__ */#endif /* _XTENSA_PGALLOC_H */