/* SPDX-License-Identifier: GPL-2.0-only *//* * include/asm-xtensa/pgalloc.h * * Copyright (C) 2001-2007 Tensilica Inc. */ #ifndef _XTENSA_PGALLOC_H#define _XTENSA_PGALLOC_H #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);} static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm){	pte_t *ptep;	int i; 	ptep = (pte_t *)__get_free_page(GFP_KERNEL);	if (!ptep)		return NULL;	for (i = 0; i < 1024; i++)		pte_clear(NULL, 0, ptep + i);	return ptep;} static inline pgtable_t pte_alloc_one(struct mm_struct *mm){	pte_t *pte;	struct page *page; 	pte = pte_alloc_one_kernel(mm);	if (!pte)		return NULL;	page = virt_to_page(pte);	if (!pgtable_page_ctor(page)) {		__free_page(page);		return NULL;	}	return page;} 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 pmd_pgtable(pmd) pmd_page(pmd) #endif /* _XTENSA_PGALLOC_H */