/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2015 Imagination Technologies
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* Author: Alex Smith <alex.smith@imgtec.com>
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*/
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#ifndef __ASM_VDSO_H
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#define __ASM_VDSO_H
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#include <linux/mm_types.h>
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#include <vdso/datapage.h>
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#include <asm/barrier.h>
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/**
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* struct mips_vdso_image - Details of a VDSO image.
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* @data: Pointer to VDSO image data (page-aligned).
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* @size: Size of the VDSO image data (page-aligned).
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* @off_sigreturn: Offset of the sigreturn() trampoline.
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* @off_rt_sigreturn: Offset of the rt_sigreturn() trampoline.
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* @mapping: Special mapping structure.
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*
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* This structure contains details of a VDSO image, including the image data
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* and offsets of certain symbols required by the kernel. It is generated as
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* part of the VDSO build process, aside from the mapping page array, which is
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* populated at runtime.
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*/
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struct mips_vdso_image {
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void *data;
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unsigned long size;
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unsigned long off_sigreturn;
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unsigned long off_rt_sigreturn;
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struct vm_special_mapping mapping;
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};
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/*
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* The following structures are auto-generated as part of the build for each
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* ABI by genvdso, see arch/mips/vdso/Makefile.
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*/
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extern struct mips_vdso_image vdso_image;
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#ifdef CONFIG_MIPS32_O32
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extern struct mips_vdso_image vdso_image_o32;
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#endif
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#ifdef CONFIG_MIPS32_N32
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extern struct mips_vdso_image vdso_image_n32;
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#endif
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union mips_vdso_data {
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struct vdso_data data[CS_BASES];
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u8 page[PAGE_SIZE];
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};
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#endif /* __ASM_VDSO_H */
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