/*  * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) * Copyright 2003 PathScale, Inc. * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h * Licensed under the GPL */ #ifndef __UM_PGALLOC_H#define __UM_PGALLOC_H #include "linux/mm.h"#include "asm/fixmap.h" #define pmd_populate_kernel(mm, pmd, pte) \	set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte))) #define pmd_populate(mm, pmd, pte) 				\	set_pmd(pmd, __pmd(_PAGE_TABLE +			\		((unsigned long long)page_to_pfn(pte) <<	\			(unsigned long long) PAGE_SHIFT)))#define pmd_pgtable(pmd) pmd_page(pmd) /* * Allocate and free page tables. */extern pgd_t *pgd_alloc(struct mm_struct *);extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long); static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte){	free_page((unsigned long) pte);} static inline void pte_free(struct mm_struct *mm, pgtable_t pte){	pgtable_page_dtor(pte);	__free_page(pte);} #define __pte_free_tlb(tlb,pte, address)		\do {							\	pgtable_page_dtor(pte);				\	tlb_remove_page((tlb),(pte));			\} while (0) #ifdef CONFIG_3_LEVEL_PGTABLES static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd){	free_page((unsigned long)pmd);} #define __pmd_free_tlb(tlb,x, address)   tlb_remove_page((tlb),virt_to_page(x))#endif #define check_pgt_cache()	do { } while (0) #endif