1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved.
4 * Copyright 2010 Tilera Corporation. All Rights Reserved.
5 * Copyright 2015 Regents of the University of California, Berkeley
7 * See asm-generic/syscall.h for descriptions of what we must do here.
10 #ifndef _ASM_RISCV_SYSCALL_H
11 #define _ASM_RISCV_SYSCALL_H
13 #include <uapi/linux/audit.h>
14 #include <linux/sched.h>
15 #include <linux/err.h>
17 /* The array of function pointers for syscalls. */
18 extern void * const sys_call_table[];
19 extern void * const compat_sys_call_table[];
22 * Only the low 32 bits of orig_r0 are meaningful, so we return int.
23 * This importantly ignores the high bits on 64-bit, so comparisons
24 * sign-extend the low 32 bits.
26 static inline int syscall_get_nr(struct task_struct *task,
32 static inline void syscall_rollback(struct task_struct *task,
35 regs->a0 = regs->orig_a0;
38 static inline long syscall_get_error(struct task_struct *task,
41 unsigned long error = regs->a0;
43 return IS_ERR_VALUE(error) ? error : 0;
46 static inline long syscall_get_return_value(struct task_struct *task,
52 static inline void syscall_set_return_value(struct task_struct *task,
56 regs->a0 = (long) error ?: val;
59 static inline void syscall_get_arguments(struct task_struct *task,
63 args[0] = regs->orig_a0;
65 memcpy(args, ®s->a1, 5 * sizeof(args[0]));
68 static inline int syscall_get_arch(struct task_struct *task)
71 return AUDIT_ARCH_RISCV64;
73 return AUDIT_ARCH_RISCV32;
77 asmlinkage long sys_riscv_flush_icache(uintptr_t, uintptr_t, uintptr_t);
78 #endif /* _ASM_RISCV_SYSCALL_H */