83 lines
2.6 KiB
C
83 lines
2.6 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/sunos/sun_bios.c,v 1.4 2004/03/08 15:37:12 tsi Exp $ */
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/*
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* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany
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* Copyright 1993 by David Wexelblat <dwex@goblin.org>
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* Copyright 1999 by David Holland <davidh@iquest.net>
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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 copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the names of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
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* SHALL THE COPYRIGHT HOLDERS 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 PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#ifdef i386
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#define _NEED_SYSI86
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#endif
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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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#ifndef MAP_FAILED
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#define MAP_FAILED ((void *)-1)
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#endif
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extern char *apertureDevName;
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/*
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* Read BIOS via mmap()ing physical memory.
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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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int fd;
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unsigned char *ptr;
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int psize;
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int mlen;
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psize = xf86getpagesize();
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Offset += Base & (psize - 1);
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Base &= ~(psize - 1);
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mlen = (Offset + Len + psize - 1) & ~(psize - 1);
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if (!xf86LinearVidMem())
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FatalError("xf86ReadBIOS: Could not mmap BIOS [a=%lx]\n", Base);
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if ((fd = open(apertureDevName, O_RDONLY)) < 0)
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{
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xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n",
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apertureDevName, strerror(errno));
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return(-1);
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}
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ptr = (unsigned char *)mmap((caddr_t)0, mlen, PROT_READ,
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MAP_SHARED, fd, (off_t)Base);
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if (ptr == MAP_FAILED)
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{
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xf86Msg(X_WARNING, "xf86ReadBIOS: %s mmap failed "
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"[0x%08lx, 0x%04x]\n",
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apertureDevName, Base, mlen);
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close(fd);
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return -1;
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}
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(void)memcpy(Buf, (void *)(ptr + Offset), Len);
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(void)munmap((caddr_t)ptr, mlen);
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(void)close(fd);
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return Len;
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}
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