Annotation of sys/dev/acpi/acpiutil.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: acpiutil.c,v 1.3 2006/12/19 23:01:47 deraadt Exp $ */
2: /*
3: * Copyright (c) 2005 Thorsten Lockert <tholo@sigmasoft.com>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17:
18: #include <sys/types.h>
19: #include <sys/systm.h>
20: #include <sys/device.h>
21:
22: #include <machine/bus.h>
23:
24: #include <dev/acpi/acpireg.h>
25: #include <dev/acpi/acpivar.h>
26:
27: u_int
28: acpi_checksum(const void *v, size_t len)
29: {
30: const u_char *p = v;
31: u_char s = 0;
32: int i;
33:
34: for (i = 0; i < len; i++)
35: s += p[i];
36:
37: if (s)
38: printf("acpi: bad checksum at %p\n", v);
39: return (s);
40: }
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