/* * linux/arch/unicore32/include/asm/pgalloc.h * * Code specific to PKUnity SoC and UniCore ISA * * Copyright (C) 2001-2010 GUAN Xue-tao * * 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. */#ifndef __UNICORE_PGALLOC_H__#define __UNICORE_PGALLOC_H__ #include <asm/pgtable-hwdef.h>#include <asm/processor.h>#include <asm/cacheflush.h>#include <asm/tlbflush.h> #define check_pgt_cache()		do { } while (0) #define _PAGE_USER_TABLE	(PMD_TYPE_TABLE | PMD_PRESENT)#define _PAGE_KERNEL_TABLE	(PMD_TYPE_TABLE | PMD_PRESENT) extern pgd_t *get_pgd_slow(struct mm_struct *mm);extern void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd); #define pgd_alloc(mm)			get_pgd_slow(mm)#define pgd_free(mm, pgd)		free_pgd_slow(mm, pgd) #define PGALLOC_GFP	(GFP_KERNEL | __GFP_NOTRACK | __GFP_REPEAT | __GFP_ZERO) /* * Allocate one PTE table. */static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long addr){	pte_t *pte; 	pte = (pte_t *)__get_free_page(PGALLOC_GFP);	if (pte)		clean_dcache_area(pte, PTRS_PER_PTE * sizeof(pte_t)); 	return pte;} static inline pgtable_tpte_alloc_one(struct mm_struct *mm, unsigned long addr){	struct page *pte; 	pte = alloc_pages(PGALLOC_GFP, 0);	if (!pte)		return NULL;	if (!PageHighMem(pte)) {		void *page = page_address(pte);		clean_dcache_area(page, PTRS_PER_PTE * sizeof(pte_t));	}	if (!pgtable_page_ctor(pte)) {		__free_page(pte);	} 	return pte;} /* * Free one PTE table. */static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte){	if (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);} static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval){	set_pmd(pmdp, __pmd(pmdval));	flush_pmd_entry(pmdp);} /* * Populate the pmdp entry with a pointer to the pte.  This pmd is part * of the mm address space. */static inline voidpmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep){	unsigned long pte_ptr = (unsigned long)ptep; 	/*	 * The pmd must be loaded with the physical	 * address of the PTE table	 */	__pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE);} static inline voidpmd_populate(struct mm_struct *mm, pmd_t *pmdp, pgtable_t ptep){	__pmd_populate(pmdp,			page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);}#define pmd_pgtable(pmd) pmd_page(pmd) #endif