source: trunk/libs/newlib/src/libgloss/sparc_leon/catch_interrupt_svt.c @ 444

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

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

File size: 2.1 KB
Line 
1/*
2 * Copyright (c) 2011 Aeroflex Gaisler
3 *
4 * BSD license:
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25
26#include <asm-leon/leonstack.h>
27#include <asm-leon/irq.h>
28#define NULL 0
29
30/* single vector trapping version of trap handler installs */
31struct svt_trap_entry
32{
33  int start, end, func;
34};
35extern struct svt_trap_entry trap_table[28];
36extern struct svt_trap_entry svt_trap_table_ext[17];
37extern struct svt_trap_entry svt_trap_table_ext_end;
38
39static struct svt_trap_entry *
40gettrap_pos (int nr)
41{
42  struct svt_trap_entry *p = trap_table;
43  while ((p->start) || (p->end) || (p->func))
44    {
45      if (p->start <= nr && p->end >= nr)
46        {
47          break;
48        }
49      p++;
50    }
51  return p;
52}
53
54int
55svtloleveltrapinstall (int trap, void (*handler) ())
56{
57  struct svt_trap_entry *p = gettrap_pos (trap);
58  if (p >= &svt_trap_table_ext_end)
59    {
60      return 0;
61    }
62  p->start = trap;
63  p->end = trap;
64  p->func = handler;
65  return 1;
66}
67
68int
69svtlolevelirqinstall (int irqnr, void (*handler) ())
70{
71  if (irqnr == 0 || irqnr >= 15)
72    {
73      return 0;
74    }
75  return svtloleveltrapinstall (irqnr + 0x10, handler);
76}
Note: See TracBrowser for help on using the repository browser.