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syscon.h revision 1.1 
      1 /* $NetBSD: syscon.h,v 1.1 2018/06/30 12:35:18 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2018 Jared McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _FDT_SYSCON_H
     30 #define _FDT_SYSCON_H
     31 
     32 struct syscon {
     33 	void		*priv;
     34 
     35 	void		(*lock)(void *);
     36 	void		(*unlock)(void *);
     37 	uint32_t	(*read_4)(void *, bus_size_t);
     38 	void		(*write_4)(void *, bus_size_t, uint32_t);
     39 };
     40 
     41 #define	syscon_lock(_syscon)					\
     42 	(_syscon)->lock((_syscon)->priv)
     43 
     44 #define	syscon_unlock(_syscon)					\
     45 	(_syscon)->unlock((_syscon)->priv)
     46 
     47 #define	syscon_read_4(_syscon, _reg)				\
     48 	(_syscon)->read_4((_syscon)->priv, (_reg))
     49 
     50 #define	syscon_write_4(_syscon, _reg, _val)			\
     51 	(_syscon)->write_4((_syscon)->priv, (_reg), (_val))
     52 
     53 
     54 #endif /* !_FDT_SYSCON_H */
     55