1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License 2. See the file "COPYING-GPL-2" in the main directory of this
4 * archive for more details.
5 *
6 * Copyright (C) 2013 Imagination Technologies Ltd.
7 * Author: Yann Le Du <ledu@kymasys.com>
8 *
9 * This file incorporates work covered by the following copyright notice:
10 */
11
12 /**
13 * \file
14 * \brief L4 IPC System Calls, MIPS
15 * \ingroup api_calls
16 */
17 /*
18 * (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
19 * Alexander Warg <warg@os.inf.tu-dresden.de>
20 * economic rights: Technische Universität Dresden (Germany)
21 *
22 * This file is part of TUD:OS and distributed under the terms of the
23 * GNU General Public License 2.
24 * Please see the COPYING-GPL-2 file for details.
25 *
26 * As a special exception, you may use this file as part of a free software
27 * library without restriction. Specifically, if other files instantiate
28 * templates or use macros or inline functions from this file, or you compile
29 * this file and link it with other files to produce an executable, this
30 * file does not by itself cause the resulting executable to be covered by
31 * the GNU General Public License. This exception does not however
32 * invalidate any other reasons why the executable file might be covered by
33 * the GNU General Public License.
34 */
35 #pragma once
36
37 #include_next <l4/sys/ipc.h>
38
39 #ifdef __GNUC__
40
41 #include <l4/sys/compiler.h>
42
43 L4_INLINE l4_msgtag_t
l4_ipc(l4_cap_idx_t dest,l4_utcb_t * utcb,l4_umword_t flags,l4_umword_t slabel,l4_msgtag_t tag,l4_umword_t * rlabel,l4_timeout_t timeout)44 l4_ipc(l4_cap_idx_t dest, l4_utcb_t *utcb,
45 l4_umword_t flags,
46 l4_umword_t slabel,
47 l4_msgtag_t tag,
48 l4_umword_t *rlabel,
49 l4_timeout_t timeout) L4_NOTHROW
50 {
51 register void *_utcb __asm__("s0") = utcb;
52 register l4_umword_t _dest __asm__("s1") = dest | flags;
53 register l4_umword_t _timeout __asm__("s2") = timeout.raw;
54 register l4_mword_t _tag __asm__("s3") = tag.raw;
55 register l4_umword_t _label __asm__("s4") = slabel;
56
57 /* the kernl preserves sp(29), fp(30), and gp(28) */
58 /* s0 - s4 are in/out arguments */
59 __asm__ __volatile__
60 ("syscall"
61 :
62 "+r" (_dest),
63 "+r" (_timeout),
64 "+r" (_label),
65 "+r" (_tag),
66 "+r" (_utcb)
67 :
68 : "$2", "$3", "$4", "$5", "$6", "$7", "$8", "$9", "$10", "$11",
69 "$12", "$13", "$14", "$15", "$22", "$23", "$24", "$25",
70 "$31", "memory");
71
72 if (rlabel)
73 *rlabel = _label;
74 tag.raw = _tag;
75
76 return tag;
77 }
78
79 #endif //__GNUC__
80