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/*
* 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.
*
*/
/* $XFree86$ */
#include "X.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
/*
* Read BIOS using smem_create facility
*/
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
}
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