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 unsigned long find_iomem(char *driver, unsigned long *len_out);
50 extern void mem_total_pages(unsigned long physmem, unsigned long iomem,
51 unsigned long highmem);
52 extern void setup_physmem(unsigned long start, unsigned long usable,
53 unsigned long len, unsigned long long highmem);
54 extern void map_memory(unsigned long virt, unsigned long phys,
55 unsigned long len, int r, int w, int x);
56
57 #endif
58
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