1 /*
2 * OpenRISC Linux
3 *
4 * Linux architectural port borrowing liberally from similar works of
5 * others. All original copyrights apply as per the original source
6 * declaration.
7 *
8 * OpenRISC implementation:
9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
11 * et al.
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 */
18
19 #ifndef __ASM_OPENRISC_SYSCALL_H__
20 #define __ASM_OPENRISC_SYSCALL_H__
21
22 #include <linux/err.h>
23 #include <linux/sched.h>
24
25 static inline int
syscall_get_nr(struct task_struct * task,struct pt_regs * regs)26 syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
27 {
28 return regs->orig_gpr11;
29 }
30
31 static inline void
syscall_rollback(struct task_struct * task,struct pt_regs * regs)32 syscall_rollback(struct task_struct *task, struct pt_regs *regs)
33 {
34 regs->gpr[11] = regs->orig_gpr11;
35 }
36
37 static inline long
syscall_get_error(struct task_struct * task,struct pt_regs * regs)38 syscall_get_error(struct task_struct *task, struct pt_regs *regs)
39 {
40 return IS_ERR_VALUE(regs->gpr[11]) ? regs->gpr[11] : 0;
41 }
42
43 static inline long
syscall_get_return_value(struct task_struct * task,struct pt_regs * regs)44 syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
45 {
46 return regs->gpr[11];
47 }
48
49 static inline void
syscall_set_return_value(struct task_struct * task,struct pt_regs * regs,int error,long val)50 syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
51 int error, long val)
52 {
53 regs->gpr[11] = (long) error ?: val;
54 }
55
56 static inline void
syscall_get_arguments(struct task_struct * task,struct pt_regs * regs,unsigned int i,unsigned int n,unsigned long * args)57 syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
58 unsigned int i, unsigned int n, unsigned long *args)
59 {
60 BUG_ON(i + n > 6);
61
62 memcpy(args, ®s->gpr[3 + i], n * sizeof(args[0]));
63 }
64
65 static inline void
syscall_set_arguments(struct task_struct * task,struct pt_regs * regs,unsigned int i,unsigned int n,const unsigned long * args)66 syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
67 unsigned int i, unsigned int n, const unsigned long *args)
68 {
69 BUG_ON(i + n > 6);
70
71 memcpy(®s->gpr[3 + i], args, n * sizeof(args[0]));
72 }
73
74 #endif
75