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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/um/include/shared/mem_user.h
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/*

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 * arch/um/include/mem_user.h

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 *

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 * BRIEF MODULE DESCRIPTION

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 * user side memory interface for support IO memory inside user mode linux

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 *

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 * Copyright (C) 2001 RidgeRun, Inc.

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 * Author: RidgeRun, Inc.

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 *         Greg Lonnon [email protected] or [email protected]

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 *

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 *  This program is free software; you can redistribute  it and/or modify it

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 *  under  the terms of  the GNU General  Public License as published by the

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 *  Free Software Foundation;  either version 2 of the  License, or (at your

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 *  option) any later version.

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 *

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 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED

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 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF

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 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN

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 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,

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 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

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 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF

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 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

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 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT

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 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

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 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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 *

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 *  You should have received a copy of the  GNU General Public License along

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 *  with this program; if not, write  to the Free Software Foundation, Inc.,

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 *  675 Mass Ave, Cambridge, MA 02139, USA.

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 */

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#ifndef _MEM_USER_H

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#define _MEM_USER_H

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struct iomem_region {

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	struct iomem_region *next;

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	char *driver;

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	int fd;

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	int size;

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	unsigned long phys;

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	unsigned long virt;

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};

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extern struct iomem_region *iomem_regions;

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extern int iomem_size;

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#define ROUND_4M(n) ((((unsigned long) (n)) + (1 << 22)) & ~((1 << 22) - 1))

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extern int init_mem_user(void);

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extern void setup_memory(void *entry);

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extern unsigned long find_iomem(char *driver, unsigned long *len_out);

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extern int init_maps(unsigned long physmem, unsigned long iomem,

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		     unsigned long highmem);

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extern unsigned long get_vm(unsigned long len);

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extern void setup_physmem(unsigned long start, unsigned long usable,

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			  unsigned long len, unsigned long long highmem);

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extern void add_iomem(char *name, int fd, unsigned long size);

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extern unsigned long phys_offset(unsigned long phys);

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extern void map_memory(unsigned long virt, unsigned long phys,

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		       unsigned long len, int r, int w, int x);

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#endif

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