arch/um/include/mem_user.h

   1 /*
   2  * arch/um/include/mem_user.h
   3  *
   4  * BRIEF MODULE DESCRIPTION
   5  * user side memory interface for support 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 #ifndef _MEM_USER_H
  33 #define _MEM_USER_H
  34
  35 struct iomem_region {
  36         struct iomem_region *next;
  37         char *driver;
  38         int fd;
  39         int size;
  40         unsigned long phys;
  41         unsigned long virt;
  42 };
  43
  44 extern struct iomem_region *iomem_regions;
  45 extern int iomem_size;
  46
  47 #define ROUND_4M(n) ((((unsigned long) (n)) + (1 << 22)) & ~((1 << 22) - 1))
  48
  49 extern int init_mem_user(void);
  50 extern void setup_memory(void *entry);
  51 extern unsigned long find_iomem(char *driver, unsigned long *len_out);
  52 extern int init_maps(unsigned long physmem, unsigned long iomem,
  53                      unsigned long highmem);
  54 extern unsigned long get_vm(unsigned long len);
  55 extern void setup_physmem(unsigned long start, unsigned long usable,
  56                           unsigned long len, unsigned long long highmem);
  57 extern void add_iomem(char *name, int fd, unsigned long size);
  58 extern unsigned long phys_offset(unsigned long phys);
  59 extern void map_memory(unsigned long virt, unsigned long phys,
  60                        unsigned long len, int r, int w, int x);
  61
  62 #endif