/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASM_PGALLOC_H#define _ASM_PGALLOC_H #include <linux/gfp.h>#include <linux/mm.h>#include <linux/threads.h>#include <asm/processor.h>#include <asm/fixmap.h> #include <asm/cache.h> #define __HAVE_ARCH_PMD_ALLOC_ONE#define __HAVE_ARCH_PMD_FREE#define __HAVE_ARCH_PGD_FREE#include <asm-generic/pgalloc.h> /* Allocate the top level pgd (page directory) */static inline pgd_t *pgd_alloc(struct mm_struct *mm){	pgd_t *pgd; 	pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_TABLE_ORDER);	if (unlikely(pgd == NULL))		return NULL; 	memset(pgd, 0, PAGE_SIZE << PGD_TABLE_ORDER); 	return pgd;} static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd){	free_pages((unsigned long)pgd, PGD_TABLE_ORDER);} #if CONFIG_PGTABLE_LEVELS == 3 /* Three Level Page Table Support for pmd's */ static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd){	set_pud(pud, __pud((PxD_FLAG_PRESENT | PxD_FLAG_VALID) +			(__u32)(__pa((unsigned long)pmd) >> PxD_VALUE_SHIFT)));} static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address){	pmd_t *pmd; 	pmd = (pmd_t *)__get_free_pages(GFP_PGTABLE_KERNEL, PMD_TABLE_ORDER);	if (likely(pmd))		memset ((void *)pmd, 0, PAGE_SIZE << PMD_TABLE_ORDER);	return pmd;} static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd){	free_pages((unsigned long)pmd, PMD_TABLE_ORDER);}#endif static inline voidpmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte){	set_pmd(pmd, __pmd((PxD_FLAG_PRESENT | PxD_FLAG_VALID)		+ (__u32)(__pa((unsigned long)pte) >> PxD_VALUE_SHIFT)));} #define pmd_populate(mm, pmd, pte_page) \	pmd_populate_kernel(mm, pmd, page_address(pte_page)) #endif