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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Author: Huacai Chen <chenhuacai@loongson.cn>
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#ifndef __ASM_VDSO_H
#define __ASM_VDSO_H
#include <linux/mm_types.h>
#include <vdso/datapage.h>
#include <asm/barrier.h>
/*
* struct loongarch_vdso_info - Details of a VDSO image.
* @vdso: Pointer to VDSO image (page-aligned).
* @size: Size of the VDSO image (page-aligned).
* @off_rt_sigreturn: Offset of the rt_sigreturn() trampoline.
* @code_mapping: Special mapping structure for vdso code.
* @code_mapping: Special mapping structure for vdso data.
*
* This structure contains details of a VDSO image, including the image data
* and offsets of certain symbols required by the kernel. It is generated as
* part of the VDSO build process, aside from the mapping page array, which is
* populated at runtime.
*/
struct loongarch_vdso_info {
void *vdso;
unsigned long size;
unsigned long offset_sigreturn;
struct vm_special_mapping code_mapping;
struct vm_special_mapping data_mapping;
};
extern struct loongarch_vdso_info vdso_info;
#endif /* __ASM_VDSO_H */
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