arch/um/kernel/mem_user.c

   1 /*
   2  * arch/um/kernel/mem_user.c
   3  *
   4  * BRIEF MODULE DESCRIPTION
   5  * user side memory routines for supporting IO memory inside user mode linux
   6  *
   7  * Copyright (C) 2001 RidgeRun, Inc.
   8  * Author: RidgeRun, Inc.
   9  *         Greg Lonnon glonnon@ridgerun.com or info@ridgerun.com
  10  *
  11  *  This program is free software; you can redistribute  it and/or modify it
  12  *  under  the terms of  the GNU General  Public License as published by the
  13  *  Free Software Foundation;  either version 2 of the  License, or (at your
  14  *  option) any later version.
  15  *
  16  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  17  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  18  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  19  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  20  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  22  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  23  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  24  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  *  You should have received a copy of the  GNU General Public License along
  28  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  29  *  675 Mass Ave, Cambridge, MA 02139, USA.
  30  */
  31
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <stddef.h>
  35 #include <stdarg.h>
  36 #include <unistd.h>
  37 #include <errno.h>
  38 #include <string.h>
  39 #include <fcntl.h>
  40 #include <sys/types.h>
  41 #include <sys/mman.h>
  42 #include "kern_util.h"
  43 #include "user.h"
  44 #include "user_util.h"
  45 #include "mem_user.h"
  46 #include "init.h"
  47 #include "os.h"
  48 #include "tempfile.h"
  49 #include "kern_constants.h"
  50
  51 struct iomem_region *iomem_regions = NULL;
  52 int iomem_size = 0;
  53
  54 extern int parse_iomem(char *str, int *add) __init;
  55
  56 __uml_setup("iomem=", parse_iomem,
  57 "iomem=<name>,<file>\n"
  58 "    Configure <file> as an IO memory region named <name>.\n\n"
  59 );
  60
  61 /*
  62  * Overrides for Emacs so that we follow Linus's tabbing style.
  63  * Emacs will notice this stuff at the end of the file and automatically
  64  * adjust the settings for this buffer only.  This must remain at the end
  65  * of the file.
  66  * ---------------------------------------------------------------------------
  67  * Local variables:
  68  * c-file-style: "linux"
  69  * End:
  70  */