/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_INIT_H
#define _ASM_X86_INIT_H

#if defined(CONFIG_CC_IS_CLANG) && CONFIG_CLANG_VERSION < 170000
#define __head	__section(".head.text") __no_sanitize_undefined __no_stack_protector
#else
#define __head	__section(".head.text") __no_sanitize_undefined __no_kstack_erase
#endif

struct x86_mapping_info {
	void *(*alloc_pgt_page)(void *); /* allocate buf for page table */
	void (*free_pgt_page)(void *, void *); /* free buf for page table */
	void *context;			 /* context for alloc_pgt_page */
	unsigned long page_flag;	 /* page flag for PMD or PUD entry */
	unsigned long offset;		 /* ident mapping offset */
	bool direct_gbpages;		 /* PUD level 1GB page support */
	unsigned long kernpg_flag;	 /* kernel pagetable flag override */
};

int kernel_ident_mapping_init(struct x86_mapping_info *info, pgd_t *pgd_page,
				unsigned long pstart, unsigned long pend);

void kernel_ident_mapping_free(struct x86_mapping_info *info, pgd_t *pgd);

#endif /* _ASM_X86_INIT_H */