46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
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/*
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* Copyright (C) 2012 ARM Limited
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* Copyright (C) 2014 Regents of the University of California
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* Copyright (C) 2017 SiFive
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _ASM_RISCV_VDSO_H
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#define _ASM_RISCV_VDSO_H
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#include <linux/types.h>
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struct vdso_data {
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};
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/*
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* The VDSO symbols are mapped into Linux so we can just use regular symbol
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* addressing to get their offsets in userspace. The symbols are mapped at an
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* offset of 0, but since the linker must support setting weak undefined
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* symbols to the absolute address 0 it also happens to support other low
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* addresses even when the code model suggests those low addresses would not
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* otherwise be availiable.
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*/
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#define VDSO_SYMBOL(base, name) \
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({ \
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extern const char __vdso_##name[]; \
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(void __user *)((unsigned long)(base) + __vdso_##name); \
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})
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#ifdef CONFIG_SMP
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asmlinkage long sys_riscv_flush_icache(uintptr_t, uintptr_t, uintptr_t);
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#endif
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#endif /* _ASM_RISCV_VDSO_H */
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