70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*
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* Copyright 1993 by Thomas Mueller
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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 Thomas Mueller 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. Thomas Mueller 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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* THOMAS MUELLER 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 THOMAS MUELLER 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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/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/lynxos/lynx_mmap.c,v 3.6 2000/02/11 22:36:02 dawes Exp $ */
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#include "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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/*
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* Read BIOS using smem_create facility
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*/
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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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#if defined(__powerpc__)
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xf86Msg(X_WARNING, "xf86ReadBios: no BIOS-probe on PowerPC\n");
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return(-1);
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#else
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char *p;
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int mlen;
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mlen = (Offset + Len + 4095) & ~4095;
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p = smem_create("BIOS-probe", (char *)Base, mlen, SM_READ);
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if (p == NULL)
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{
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/* check if there is a stale segment around */
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if (smem_remove("BIOS-probe") == 0) {
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xf86Msg(X_INFO,
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"xf86ReadBios: removed stale smem_ segment\n");
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p = smem_create("BIOS-probe", (char *)Base, mlen, SM_READ);
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}
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if (p == NULL) {
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xf86Msg(X_WARNING, "xf86ReadBios: Failed to smem_create "
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"Base %x len %x %s \n",
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Base, mlen, strerror(errno));
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return(-1);
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}
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}
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memcpy(Buf, p + Offset, Len);
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smem_create(NULL, p, 0, SM_DETACH);
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smem_remove("BIOS-probe");
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return(Len);
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#endif
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}
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