77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
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/*
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* Copyright 1993 by David Wexelblat <dwex@goblin.org>
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of David Wexelblat not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. David Wexelblat makes no representations
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* about the suitability of this software for any purpose. It is provided
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* "as is" without express or implied warranty.
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*
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* DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL DAVID WEXELBLAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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/* $XConsortium: bios_devmem.c /main/5 1996/10/19 18:07:41 kaleb $ */
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include <X11/X.h>
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#include "xf86.h"
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#include "xf86Priv.h"
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#include "xf86_OSlib.h"
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#include <string.h>
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/*
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* Read BIOS via /dev/mem.
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*/
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#ifndef DEV_MEM
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# define DEV_MEM "/dev/mem"
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#endif
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_X_EXPORT int
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xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
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int Len)
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{
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int fd;
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#ifdef __ia64__
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if ((fd = open(DEV_MEM, O_RDONLY | O_SYNC)) < 0)
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#else
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if ((fd = open(DEV_MEM, O_RDONLY)) < 0)
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#endif
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{
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xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n",
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DEV_MEM, strerror(errno));
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return(-1);
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}
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if (lseek(fd, (Base+Offset), SEEK_SET) < 0)
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{
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xf86Msg(X_WARNING, "xf86ReadBIOS: %s seek failed (%s)\n",
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DEV_MEM, strerror(errno));
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close(fd);
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return(-1);
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}
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if (read(fd, Buf, Len) != Len)
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{
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xf86Msg(X_WARNING, "xf86ReadBIOS: %s read failed (%s)\n",
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DEV_MEM, strerror(errno));
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close(fd);
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return(-1);
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}
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close(fd);
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return(Len);
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}
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