Xenomai  3.0.5
syscall.h
1 /*
2  * Copyright (C) 2001,2002,2003,2004 Philippe Gerum <rpm@xenomai.org>.
3  *
4  * ARM port
5  * Copyright (C) 2005 Stelian Pop
6  *
7  * Xenomai is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published
9  * by the Free Software Foundation; either version 2 of the License,
10  * or (at your option) any later version.
11  *
12  * Xenomai is distributed in the hope that it will be useful, but
13  * WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with Xenomai; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20  * 02111-1307, USA.
21  */
22 #ifndef _COBALT_ARM_ASM_SYSCALL_H
23 #define _COBALT_ARM_ASM_SYSCALL_H
24 
25 #include <linux/errno.h>
26 #include <asm/uaccess.h>
27 #include <asm/unistd.h>
28 #include <asm/ptrace.h>
29 #include <asm-generic/xenomai/syscall.h>
30 
31 #ifndef __ARM_NR_ipipe
32 /* Legacy pipelines do not define this. */
33 #define __ARM_NR_ipipe (__NR_SYSCALL_BASE + XENO_ARM_SYSCALL)
34 #endif
35 
36 #define __xn_reg_sys(__regs) ((__regs)->ARM_ORIG_r0)
37 /* In OABI_COMPAT mode, handle both OABI and EABI userspace syscalls */
38 #ifdef CONFIG_OABI_COMPAT
39 #define __xn_syscall_p(__regs) (((__regs)->ARM_r7 == __NR_OABI_SYSCALL_BASE + XENO_ARM_SYSCALL) || \
40  ((__regs)->ARM_r7 == __ARM_NR_ipipe))
41 #else /* !CONFIG_OABI_COMPAT */
42 #define __xn_syscall_p(__regs) ((__regs)->ARM_r7 == __ARM_NR_ipipe)
43 #endif /* !CONFIG_OABI_COMPAT */
44 #define __xn_syscall(__regs) (__xn_reg_sys(__regs) & ~__COBALT_SYSCALL_BIT)
45 
46 #define __xn_reg_rval(__regs) ((__regs)->ARM_r0)
47 #define __xn_reg_arg1(__regs) ((__regs)->ARM_r1)
48 #define __xn_reg_arg2(__regs) ((__regs)->ARM_r2)
49 #define __xn_reg_arg3(__regs) ((__regs)->ARM_r3)
50 #define __xn_reg_arg4(__regs) ((__regs)->ARM_r4)
51 #define __xn_reg_arg5(__regs) ((__regs)->ARM_r5)
52 #define __xn_reg_pc(__regs) ((__regs)->ARM_ip)
53 #define __xn_reg_sp(__regs) ((__regs)->ARM_sp)
54 
55 static inline void __xn_error_return(struct pt_regs *regs, int v)
56 {
57  __xn_reg_rval(regs) = v;
58 }
59 
60 static inline void __xn_status_return(struct pt_regs *regs, long v)
61 {
62  __xn_reg_rval(regs) = v;
63 }
64 
65 static inline int __xn_interrupted_p(struct pt_regs *regs)
66 {
67  return __xn_reg_rval(regs) == -EINTR;
68 }
69 
70 int xnarch_local_syscall(unsigned long a1, unsigned long a2,
71  unsigned long a3, unsigned long a4,
72  unsigned long a5);
73 
74 #endif /* !_COBALT_ARM_ASM_SYSCALL_H */