/* SPDX-License-Identifier: GPL-2.0 *//* *  S390 version *    Copyright IBM Corp. 1999, 2000 *    Author(s): Hartmut Penner (hp@de.ibm.com) *               Martin Schwidefsky (schwidefsky@de.ibm.com) * *  Derived from "include/asm-i386/pgalloc.h" *    Copyright (C) 1994  Linus Torvalds */ #ifndef _S390_PGALLOC_H#define _S390_PGALLOC_H #include <linux/threads.h>#include <linux/string.h>#include <linux/gfp.h>#include <linux/mm.h> #define CRST_ALLOC_ORDER 2 unsigned long *crst_table_alloc_noprof(struct mm_struct *);#define crst_table_alloc(...)	alloc_hooks(crst_table_alloc_noprof(__VA_ARGS__))void crst_table_free(struct mm_struct *, unsigned long *); unsigned long *page_table_alloc_noprof(struct mm_struct *);#define page_table_alloc(...)	alloc_hooks(page_table_alloc_noprof(__VA_ARGS__))void page_table_free(struct mm_struct *, unsigned long *); static inline void crst_table_init(unsigned long *crst, unsigned long entry){	memset64((u64 *)crst, entry, _CRST_ENTRIES);} int crst_table_upgrade(struct mm_struct *mm, unsigned long limit); static inline unsigned long check_asce_limit(struct mm_struct *mm, unsigned long addr,					     unsigned long len){	int rc; 	if (addr + len > mm->context.asce_limit &&	    addr + len <= TASK_SIZE) {		rc = crst_table_upgrade(mm, addr + len);		if (rc)			return (unsigned long) rc;	}	return addr;} static inline p4d_t *p4d_alloc_one_noprof(struct mm_struct *mm, unsigned long address){	unsigned long *table = crst_table_alloc_noprof(mm); 	if (!table)		return NULL;	crst_table_init(table, _REGION2_ENTRY_EMPTY);	pagetable_p4d_ctor(virt_to_ptdesc(table)); 	return (p4d_t *) table;}#define p4d_alloc_one(...)	alloc_hooks(p4d_alloc_one_noprof(__VA_ARGS__)) static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d){	if (mm_p4d_folded(mm))		return; 	pagetable_dtor(virt_to_ptdesc(p4d));	crst_table_free(mm, (unsigned long *) p4d);} static inline pud_t *pud_alloc_one_noprof(struct mm_struct *mm, unsigned long address){	unsigned long *table = crst_table_alloc_noprof(mm); 	if (!table)		return NULL;	crst_table_init(table, _REGION3_ENTRY_EMPTY);	pagetable_pud_ctor(virt_to_ptdesc(table)); 	return (pud_t *) table;}#define pud_alloc_one(...)	alloc_hooks(pud_alloc_one_noprof(__VA_ARGS__)) static inline void pud_free(struct mm_struct *mm, pud_t *pud){	if (mm_pud_folded(mm))		return; 	pagetable_dtor(virt_to_ptdesc(pud));	crst_table_free(mm, (unsigned long *) pud);} static inline pmd_t *pmd_alloc_one_noprof(struct mm_struct *mm, unsigned long vmaddr){	unsigned long *table = crst_table_alloc_noprof(mm); 	if (!table)		return NULL;	crst_table_init(table, _SEGMENT_ENTRY_EMPTY);	if (!pagetable_pmd_ctor(mm, virt_to_ptdesc(table))) {		crst_table_free(mm, table);		return NULL;	}	return (pmd_t *) table;}#define pmd_alloc_one(...)	alloc_hooks(pmd_alloc_one_noprof(__VA_ARGS__)) static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd){	if (mm_pmd_folded(mm))		return;	pagetable_dtor(virt_to_ptdesc(pmd));	crst_table_free(mm, (unsigned long *) pmd);} static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, p4d_t *p4d){	set_pgd(pgd, __pgd(_REGION1_ENTRY | __pa(p4d)));} static inline void p4d_populate(struct mm_struct *mm, p4d_t *p4d, pud_t *pud){	set_p4d(p4d, __p4d(_REGION2_ENTRY | __pa(pud)));} static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd){	set_pud(pud, __pud(_REGION3_ENTRY | __pa(pmd)));} static inline pgd_t *pgd_alloc_noprof(struct mm_struct *mm){	unsigned long *table = crst_table_alloc_noprof(mm); 	if (!table)		return NULL;	pagetable_pgd_ctor(virt_to_ptdesc(table)); 	return (pgd_t *) table;}#define pgd_alloc(...)	alloc_hooks(pgd_alloc_noprof(__VA_ARGS__)) static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd){	pagetable_dtor(virt_to_ptdesc(pgd));	crst_table_free(mm, (unsigned long *) pgd);} static inline void pmd_populate(struct mm_struct *mm,				pmd_t *pmd, pgtable_t pte){	set_pmd(pmd, __pmd(_SEGMENT_ENTRY | __pa(pte)));} #define pmd_populate_kernel(mm, pmd, pte) pmd_populate(mm, pmd, pte) /* * page table entry allocation/free routines. */#define pte_alloc_one_kernel(mm) ((pte_t *)page_table_alloc(mm))#define pte_alloc_one(mm) ((pte_t *)page_table_alloc(mm)) #define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte)#define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte) /* arch use pte_free_defer() implementation in arch/s390/mm/pgalloc.c */#define pte_free_defer pte_free_defervoid pte_free_defer(struct mm_struct *mm, pgtable_t pgtable); void vmem_map_init(void);void *vmem_crst_alloc(unsigned long val);pte_t *vmem_pte_alloc(void); unsigned long base_asce_alloc(unsigned long addr, unsigned long num_pages);void base_asce_free(unsigned long asce); #endif /* _S390_PGALLOC_H */