1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) 2011 Texas Instruments Incorporated
4 * Author: Mark Salter <msalter@redhat.com>
5 */
6
7#ifndef __ASM_C6X_SYSCALL_H
8#define __ASM_C6X_SYSCALL_H
9
10#include <uapi/linux/audit.h>
11#include <linux/err.h>
12#include <linux/sched.h>
13
14static inline int syscall_get_nr(struct task_struct *task,
15				 struct pt_regs *regs)
16{
17	return regs->b0;
18}
19
20static inline void syscall_rollback(struct task_struct *task,
21				    struct pt_regs *regs)
22{
23	/* do nothing */
24}
25
26static inline long syscall_get_error(struct task_struct *task,
27				     struct pt_regs *regs)
28{
29	return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0;
30}
31
32static inline long syscall_get_return_value(struct task_struct *task,
33					    struct pt_regs *regs)
34{
35	return regs->a4;
36}
37
38static inline void syscall_set_return_value(struct task_struct *task,
39					    struct pt_regs *regs,
40					    int error, long val)
41{
42	regs->a4 = error ?: val;
43}
44
45static inline void syscall_get_arguments(struct task_struct *task,
46					 struct pt_regs *regs,
47					 unsigned long *args)
48{
49	*args++ = regs->a4;
50	*args++ = regs->b4;
51	*args++ = regs->a6;
52	*args++ = regs->b6;
53	*args++ = regs->a8;
54	*args   = regs->b8;
55}
56
57static inline void syscall_set_arguments(struct task_struct *task,
58					 struct pt_regs *regs,
59					 const unsigned long *args)
60{
61	regs->a4 = *args++;
62	regs->b4 = *args++;
63	regs->a6 = *args++;
64	regs->b6 = *args++;
65	regs->a8 = *args++;
66	regs->a9 = *args;
67}
68
69static inline int syscall_get_arch(struct task_struct *task)
70{
71	return IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
72		? AUDIT_ARCH_C6XBE : AUDIT_ARCH_C6X;
73}
74
75#endif /* __ASM_C6X_SYSCALLS_H */
76