1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2012 ARM Limited 4 * Copyright (C) 2014 Regents of the University of California 5 * Copyright (C) 2017 SiFive 6 */ 7 8 #ifndef _ASM_RISCV_VDSO_H 9 #define _ASM_RISCV_VDSO_H 10 11 12 /* 13 * All systems with an MMU have a VDSO, but systems without an MMU don't 14 * support shared libraries and therefor don't have one. 15 */ 16 #ifdef CONFIG_MMU 17 18 #include <linux/types.h> 19 /* 20 * All systems with an MMU have a VDSO, but systems without an MMU don't 21 * support shared libraries and therefor don't have one. 22 */ 23 #ifdef CONFIG_MMU 24 25 #define __VVAR_PAGES 1 26 27 #ifndef __ASSEMBLY__ 28 #include <generated/vdso-offsets.h> 29 30 #define VDSO_SYMBOL(base, name) \ 31 (void __user *)((unsigned long)(base) + __vdso_##name##_offset) 32 33 #endif /* CONFIG_MMU */ 34 35 #endif /* !__ASSEMBLY__ */ 36 37 #endif /* CONFIG_MMU */ 38 39 #endif /* _ASM_RISCV_VDSO_H */ 40