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/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/dgux/bios_DGmmap.c,v 1.3 2000/02/11 22:36:02 dawes Exp $ */
/*
* INTEL DG/UX RELEASE 4.20 MU03
* Copyright 1997 Takis Psarogiannakopoulos Cambridge,UK
* <takis@dpmms.cam.ac.uk>
*
* 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.
* XCONSORTIUM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE.
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FITNESS, IN NO EVENT SHALL XCONSORTIUM 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 "input.h"
#include "scrnintstr.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
/*
* Read the BIOS via mmap() to the device /dev/mem.
*/
int xf86ReadBIOS(Base, Offset, Buf, Len)
unsigned long Base;
unsigned long Offset;
unsigned char *Buf;
int Len;
{
int fd;
unsigned char *ptr;
int psize;
int mlen;
if ((fd = open(DEV_MEM, O_RDONLY)) < 0)
{
ErrorF("xf86ReadBios: Failed to open %s (%s)\n", DEV_MEM,
strerror(errno));
return(-1);
}
psize = xf86getpagesize();
Offset += Base & (psize - 1);
Base &= ~(psize - 1);
mlen = (Offset + Len + psize - 1) & ~(psize - 1);
ptr = (unsigned char *)mmap((caddr_t)0, mlen, PROT_READ, MAP_SHARED,
fd, (off_t)Base);
if ((int)ptr == -1)
{
ErrorF("xf86ReadBios: %s mmap failed\n", DEV_MEM);
close(fd);
return(-1);
}
(void)memcpy(Buf, (void *)(ptr + Offset), Len);
(void)munmap((caddr_t)ptr, mlen);
(void)close(fd);
return(Len);
}
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