/* SPDX-License-Identifier: GPL-2.0 */// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #ifndef __ASM_CSKY_PGALLOC_H#define __ASM_CSKY_PGALLOC_H #include <linux/highmem.h>#include <linux/mm.h>#include <linux/sched.h> static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,					pte_t *pte){	set_pmd(pmd, __pmd(__pa(pte)));} static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,					pgtable_t pte){	set_pmd(pmd, __pmd(__pa(page_address(pte))));} #define pmd_pgtable(pmd) pmd_page(pmd) extern void pgd_init(unsigned long *p); static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm){	pte_t *pte;	unsigned long i; 	pte = (pte_t *) __get_free_page(GFP_KERNEL);	if (!pte)		return NULL; 	for (i = 0; i < PAGE_SIZE/sizeof(pte_t); i++)		(pte + i)->pte_low = _PAGE_GLOBAL; 	return pte;} static inline struct page *pte_alloc_one(struct mm_struct *mm){	struct page *pte; 	pte = alloc_pages(GFP_KERNEL | __GFP_ZERO, 0);	if (!pte)		return NULL; 	if (!pgtable_page_ctor(pte)) {		__free_page(pte);		return NULL;	} 	return pte;} static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte){	free_pages((unsigned long)pte, PTE_ORDER);} static inline void pte_free(struct mm_struct *mm, pgtable_t pte){	pgtable_page_dtor(pte);	__free_pages(pte, PTE_ORDER);} static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd){	free_pages((unsigned long)pgd, PGD_ORDER);} static inline pgd_t *pgd_alloc(struct mm_struct *mm){	pgd_t *ret;	pgd_t *init; 	ret = (pgd_t *) __get_free_pages(GFP_KERNEL, PGD_ORDER);	if (ret) {		init = pgd_offset(&init_mm, 0UL);		pgd_init((unsigned long *)ret);		memcpy(ret + USER_PTRS_PER_PGD, init + USER_PTRS_PER_PGD,			(PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));		/* prevent out of order excute */		smp_mb();#ifdef CONFIG_CPU_NEED_TLBSYNC		dcache_wb_range((unsigned int)ret,				(unsigned int)(ret + PTRS_PER_PGD));#endif	} 	return ret;} #define __pte_free_tlb(tlb, pte, address)		\do {							\	pgtable_page_dtor(pte);				\	tlb_remove_page(tlb, pte);			\} while (0) #define check_pgt_cache()	do {} while (0) extern void pagetable_init(void);extern void pre_mmu_init(void);extern void pre_trap_init(void); #endif /* __ASM_CSKY_PGALLOC_H */