xorg-server-1.4/hw/xfree86/os-support/solaris/sun_bios.c

   1 /*
   2  * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany
   3  * Copyright 1993 by David Wexelblat <dwex@goblin.org>
   4  * Copyright 1999 by David Holland <davidh@iquest.net>
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that copyright
   9  * notice and this permission notice appear in supporting documentation, and
  10  * that the names of the copyright holders not be used in advertising or
  11  * publicity pertaining to distribution of the software without specific,
  12  * written prior permission.  The copyright holders make no representations
  13  * about the suitability of this software for any purpose.  It is provided "as
  14  * is" without express or implied warranty.
  15  *
  16  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
  18  * SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  22  * OF THIS SOFTWARE.
  23  */
  24
  25 #ifdef HAVE_XORG_CONFIG_H
  26 #include <xorg-config.h>
  27 #endif
  28
  29 #ifdef i386
  30 #define _NEED_SYSI86
  31 #endif
  32 #include "xf86.h"
  33 #include "xf86Priv.h"
  34 #include "xf86_OSlib.h"
  35
  36 #ifndef MAP_FAILED
  37 #define MAP_FAILED ((void *)-1)
  38 #endif
  39
  40 extern char *apertureDevName;
  41
  42 /*
  43  * Read BIOS via mmap()ing physical memory.
  44  */
  45 _X_EXPORT int
  46 xf86ReadBIOS(unsigned long Base, unsigned long Offset, unsigned char *Buf,
  47              int Len)
  48 {
  49         int fd;
  50         unsigned char *ptr;
  51         char solx86_vtname[20];
  52         int psize;
  53         int mlen;
  54
  55         /*
  56          * Solaris 2.1 x86 SVR4 (10/27/93)
  57          *      The server must treat the virtual terminal device file
  58          *      as the standard SVR4 /dev/pmem. By default, then used VT
  59          *      is considered the "default" file to open.
  60          *
  61          * Solaris 2.8 x86 (7/26/99) - DWH
  62          *
  63          *      Use /dev/xsvc for everything.
  64          */
  65         psize = xf86getpagesize();
  66         Offset += Base & (psize - 1);
  67         Base &= ~(psize - 1);
  68         mlen = (Offset + Len + psize - 1) & ~(psize - 1);
  69 #if defined(i386) && !defined(__SOL8__)
  70         if (Base >= 0xA0000 && Base + mlen < 0xFFFFF && xf86Info.vtno >= 0)
  71                 sprintf(solx86_vtname, "/dev/vt%02d", xf86Info.vtno);
  72         else
  73 #endif
  74         {
  75                 if (!xf86LinearVidMem())
  76                         FatalError("xf86ReadBIOS: Could not mmap BIOS"
  77                                    " [a=%lx]\n", Base);
  78                 sprintf(solx86_vtname, apertureDevName);
  79         }
  80
  81         if ((fd = open(solx86_vtname, O_RDONLY)) < 0)
  82         {
  83                 xf86Msg(X_WARNING, "xf86ReadBIOS: Failed to open %s (%s)\n",
  84                         solx86_vtname, strerror(errno));
  85                 return(-1);
  86         }
  87         ptr = (unsigned char *)mmap((caddr_t)0, mlen, PROT_READ,
  88                                         MAP_SHARED, fd, (off_t)Base);
  89         if (ptr == MAP_FAILED)
  90         {
  91                 xf86Msg(X_WARNING, "xf86ReadBIOS: %s mmap failed "
  92                         "[0x%08lx, 0x%04x]\n",
  93                         solx86_vtname, Base, mlen);
  94                 close(fd);
  95                 return -1;
  96         }
  97
  98         (void)memcpy(Buf, (void *)(ptr + Offset), Len);
  99         (void)munmap((caddr_t)ptr, mlen);
 100         (void)close(fd);
 101
 102         return Len;
 103 }