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mem_user.h
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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.
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