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 63