diff options
Diffstat (limited to 'xorg-server/hw/xfree86/os-support/shared/bios_devmem.c')
-rw-r--r-- | xorg-server/hw/xfree86/os-support/shared/bios_devmem.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/os-support/shared/bios_devmem.c b/xorg-server/hw/xfree86/os-support/shared/bios_devmem.c new file mode 100644 index 000000000..7288239be --- /dev/null +++ b/xorg-server/hw/xfree86/os-support/shared/bios_devmem.c @@ -0,0 +1,75 @@ +/* + * Copyright 1993 by David Wexelblat <dwex@goblin.org> + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of David Wexelblat not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. David Wexelblat makes no representations + * about the suitability of this software for any purpose. It is provided + * "as is" without express or implied warranty. + * + * DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL DAVID WEXELBLAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + * + */ + +#ifdef HAVE_XORG_CONFIG_H +#include <xorg-config.h> +#endif + +#include <X11/X.h> +#include "xf86.h" +#include "xf86Priv.h" +#include "xf86_OSlib.h" +#include <string.h> + +/* + * Read BIOS via /dev/mem. + */ + +#ifndef DEV_MEM +# define DEV_MEM "/dev/mem" +#endif + +_X_EXPORT int +xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf, + int Len) +{ + int fd; + +#ifdef __ia64__ + if ((fd = open(DEV_MEM, O_RDONLY | O_SYNC)) < 0) +#else + if ((fd = open(DEV_MEM, O_RDONLY)) < 0) +#endif + { + xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n", + DEV_MEM, strerror(errno)); + return(-1); + } + + if (lseek(fd, (Base+Offset), SEEK_SET) < 0) + { + xf86Msg(X_WARNING, "xf86ReadBIOS: %s seek failed (%s)\n", + DEV_MEM, strerror(errno)); + close(fd); + return(-1); + } + if (read(fd, Buf, Len) != Len) + { + xf86Msg(X_WARNING, "xf86ReadBIOS: %s read failed (%s)\n", + DEV_MEM, strerror(errno)); + close(fd); + return(-1); + } + close(fd); + return(Len); +} |