73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/*
|
|
* Copyright 1993 by Thomas Mueller
|
|
*
|
|
* 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 Thomas Mueller not be used in
|
|
* advertising or publicity pertaining to distribution of the software without
|
|
* specific, written prior permission. Thomas Mueller makes no representations
|
|
* about the suitability of this software for any purpose. It is provided
|
|
* "as is" without express or implied warranty.
|
|
*
|
|
* THOMAS MUELLER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
|
* EVENT SHALL THOMAS MUELLER 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"
|
|
|
|
/*
|
|
* Read BIOS using smem_create facility
|
|
*/
|
|
|
|
_X_EXPORT int
|
|
xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
|
|
int Len)
|
|
{
|
|
#if defined(__powerpc__)
|
|
xf86Msg(X_WARNING, "xf86ReadBios: no BIOS-probe on PowerPC\n");
|
|
return(-1);
|
|
#else
|
|
char *p;
|
|
int mlen;
|
|
|
|
mlen = (Offset + Len + 4095) & ~4095;
|
|
p = smem_create("BIOS-probe", (char *)Base, mlen, SM_READ);
|
|
if (p == NULL)
|
|
{
|
|
/* check if there is a stale segment around */
|
|
if (smem_remove("BIOS-probe") == 0) {
|
|
xf86Msg(X_INFO,
|
|
"xf86ReadBios: removed stale smem_ segment\n");
|
|
p = smem_create("BIOS-probe", (char *)Base, mlen, SM_READ);
|
|
}
|
|
if (p == NULL) {
|
|
xf86Msg(X_WARNING, "xf86ReadBios: Failed to smem_create "
|
|
"Base %x len %x %s \n",
|
|
Base, mlen, strerror(errno));
|
|
return(-1);
|
|
}
|
|
}
|
|
memcpy(Buf, p + Offset, Len);
|
|
smem_create(NULL, p, 0, SM_DETACH);
|
|
smem_remove("BIOS-probe");
|
|
return(Len);
|
|
#endif
|
|
}
|