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 * All systems with an MMU have a VDSO, but systems without an MMU don't 13 * support shared libraries and therefor don't have one. 14 */ 15 #ifdef CONFIG_MMU 16 17 #define __VVAR_PAGES 2 18 19 #ifndef __ASSEMBLY__ 20 #include <generated/vdso-offsets.h> 21 22 #define VDSO_SYMBOL(base, name) \ 23 (void __user *)((unsigned long)(base) + __vdso_##name##_offset) 24 #endif /* !__ASSEMBLY__ */ 25 26 #endif /* CONFIG_MMU */ 27 28 #endif /* _ASM_RISCV_VDSO_H */ 29