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- /*
- * 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>
- #include <linux/slab.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 */
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