1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License.  See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2001 - 2007 Tensilica Inc.
7 * Copyright (C) 2018 Cadence Design Systems Inc.
8 */
9
10#ifndef _ASM_SYSCALL_H
11#define _ASM_SYSCALL_H
12
13#include <linux/err.h>
14#include <asm/ptrace.h>
15#include <uapi/linux/audit.h>
16
17static inline int syscall_get_arch(struct task_struct *task)
18{
19	return AUDIT_ARCH_XTENSA;
20}
21
22typedef void (*syscall_t)(void);
23extern syscall_t sys_call_table[];
24
25static inline long syscall_get_nr(struct task_struct *task,
26				  struct pt_regs *regs)
27{
28	return regs->syscall;
29}
30
31static inline void syscall_rollback(struct task_struct *task,
32				    struct pt_regs *regs)
33{
34	/* Do nothing. */
35}
36
37static inline long syscall_get_error(struct task_struct *task,
38				     struct pt_regs *regs)
39{
40	/* 0 if syscall succeeded, otherwise -Errorcode */
41	return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
42}
43
44static inline long syscall_get_return_value(struct task_struct *task,
45					    struct pt_regs *regs)
46{
47	return regs->areg[2];
48}
49
50static inline void syscall_set_return_value(struct task_struct *task,
51					    struct pt_regs *regs,
52					    int error, long val)
53{
54	regs->areg[2] = (long) error ? error : val;
55}
56
57#define SYSCALL_MAX_ARGS 6
58#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
59
60static inline void syscall_get_arguments(struct task_struct *task,
61					 struct pt_regs *regs,
62					 unsigned long *args)
63{
64	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
65	unsigned int i;
66
67	for (i = 0; i < 6; ++i)
68		args[i] = regs->areg[reg[i]];
69}
70
71asmlinkage long xtensa_rt_sigreturn(void);
72asmlinkage long xtensa_shmat(int, char __user *, int);
73asmlinkage long xtensa_fadvise64_64(int, int,
74				    unsigned long long, unsigned long long);
75
76#endif
77