include/shared/mem_user.h

0001 /*
0002  * arch/um/include/mem_user.h
0003  *
0004  * BRIEF MODULE DESCRIPTION
0005  * user side memory interface for support IO memory inside user mode linux
0006  *
0007  * Copyright (C) 2001 RidgeRun, Inc.
0008  * Author: RidgeRun, Inc.
0009  *         Greg Lonnon glonnon@ridgerun.com or info@ridgerun.com
0010  *
0011  *  This program is free software; you can redistribute  it and/or modify it
0012  *  under  the terms of  the GNU General  Public License as published by the
0013  *  Free Software Foundation;  either version 2 of the  License, or (at your
0014  *  option) any later version.
0015  *
0016  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
0017  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
0018  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
0019  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
0020  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
0021  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
0022  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
0023  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
0024  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
0025  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0026  *
0027  *  You should have received a copy of the  GNU General Public License along
0028  *  with this program; if not, write  to the Free Software Foundation, Inc.,
0029  *  675 Mass Ave, Cambridge, MA 02139, USA.
0030  */
0031
0032 #ifndef _MEM_USER_H
0033 #define _MEM_USER_H
0034
0035 struct iomem_region {
0036     struct iomem_region *next;
0037     char *driver;
0038     int fd;
0039     int size;
0040     unsigned long phys;
0041     unsigned long virt;
0042 };
0043
0044 extern struct iomem_region *iomem_regions;
0045 extern int iomem_size;
0046
0047 #define ROUND_4M(n) ((((unsigned long) (n)) + (1 << 22)) & ~((1 << 22) - 1))
0048
0049 extern unsigned long find_iomem(char *driver, unsigned long *len_out);
0050 extern void mem_total_pages(unsigned long physmem, unsigned long iomem,
0051              unsigned long highmem);
0052 extern void setup_physmem(unsigned long start, unsigned long usable,
0053               unsigned long len, unsigned long long highmem);
0054 extern void map_memory(unsigned long virt, unsigned long phys,
0055                unsigned long len, int r, int w, int x);
0056
0057 #endif