source: trunk/libs/newlib/src/libgloss/cris/irqtable.S @ 546

Last change on this file since 546 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 2.8 KB
Line 
1/* Default interrupt table for CRIS/CRISv32.
2   Copyright (C) 2007 Axis Communications.
3   All rights reserved.
4
5   Redistribution and use in source and binary forms, with or without
6   modification, are permitted provided that the following conditions
7   are met:
8
9   1. Redistributions of source code must retain the above copyright
10      notice, this list of conditions and the following disclaimer.
11
12   2. Neither the name of Axis Communications nor the names of its
13      contributors may be used to endorse or promote products derived
14      from this software without specific prior written permission.
15
16   THIS SOFTWARE IS PROVIDED BY AXIS COMMUNICATIONS AND ITS CONTRIBUTORS
17   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AXIS
20   COMMUNICATIONS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
21   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
26   IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27   POSSIBILITY OF SUCH DAMAGE.  */
28
29#ifdef __ELF__
30 .section .startup,"ax"
31#else
32 .text
33#endif
34
35#if defined (__ELF__) || defined (IN_CRT0)
36; This is included from crt0.S for a.out, as we can't have it as
37; a separate object file in a library due to the lack of named
38; section support and the required placement at address 3*4.
39
40; We define an interrupt table with references to the symbols
41; _.irq_XX where XX are hex numbers 3..ff (lower-case).  They
42; are satisfied by weak aliases to the _.irq stub function in
43; this file.  When overridden, the overriding function must be
44; in code explicitly linked in, i.e. *not* in a library.
45
46 .global __irqtable_at_irq3
47__irqtable_at_irq3:
48
49 .irpc irqno,3456789abcdef
50 .weak _.irq_0\irqno
51 .set _.irq_0\irqno,_.irq
52 .dword _.irq_0\irqno
53 .endr
54
55 .irpc irqhd,123456789abcdef
56 .irpc irqld,0123456789abcdef
57 .weak _.irq_\irqhd\irqld
58 .set _.irq_\irqhd\irqld,_.irq
59 .dword _.irq_\irqhd\irqld
60 .endr
61 .endr
62
63; No use having a separate file with default _.irq_[0-f][0-f]
64; definitions; just provide a single stub with a weak definition
65; and make it up to the user to provide a strong definition that
66; they force to be linked in (i.e. not in a library or at least
67; together with another symbol they know is linked in).
68 .text
69
70_.irq:
71#ifdef __arch_common_v10_v32
72 ; This is just to allow the multilib to compile without
73 ; hackery: the "common" subset doesn't recognize
74 ; interrupt-return insns.
75#elif __CRIS_arch_version >= 32
76 rete
77 rfe
78#else
79 reti
80 nop
81#endif
82#endif /* __ELF__ || IN_CRT0 */
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