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/arch/um/include/shared/mem_user.h

http://github.com/mirrors/linux
C Header | 62 lines | 26 code | 6 blank | 30 comment | 0 complexity | 557e8b6ce496cf8d1c5081ccf213b1cb MD5 | raw file
 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
35struct 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
44extern struct iomem_region *iomem_regions;
45extern int iomem_size;
46
47#define ROUND_4M(n) ((((unsigned long) (n)) + (1 << 22)) & ~((1 << 22) - 1))
48
49extern int init_mem_user(void);
50extern void setup_memory(void *entry);
51extern unsigned long find_iomem(char *driver, unsigned long *len_out);
52extern void mem_total_pages(unsigned long physmem, unsigned long iomem,
53		     unsigned long highmem);
54extern unsigned long get_vm(unsigned long len);
55extern void setup_physmem(unsigned long start, unsigned long usable,
56			  unsigned long len, unsigned long long highmem);
57extern void add_iomem(char *name, int fd, unsigned long size);
58extern unsigned long phys_offset(unsigned long phys);
59extern void map_memory(unsigned long virt, unsigned long phys,
60		       unsigned long len, int r, int w, int x);
61
62#endif