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ioport.h revision 1.7 
      1 /*	$NetBSD: ioport.h,v 1.7 2021/12/19 11:55:38 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Taylor R. Campbell.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _LINUX_IOPORT_H_
     33 #define _LINUX_IOPORT_H_
     34 
     35 #include <sys/types.h>
     36 #include <sys/bus.h>
     37 
     38 #define	IORESOURCE_IO		__BIT(0)
     39 #define	IORESOURCE_MEM		__BIT(1)
     40 #define	IORESOURCE_IRQ		__BIT(2)
     41 #define	IORESOURCE_UNSET	__BIT(3)
     42 
     43 struct resource {
     44 	bus_addr_t start;
     45 	bus_addr_t end;		/* WARNING: Inclusive! */
     46 	const char *name;
     47 	unsigned int flags;
     48 	bus_space_tag_t r_bst;	/* This milk is not organic.  */
     49 	bus_space_handle_t r_bsh;
     50 };
     51 
     52 #define	DEFINE_RES_MEM(START, SIZE)					      \
     53 	{ .start = (START), .end = (START) + ((SIZE) - 1) }
     54 
     55 static inline bus_size_t
     56 resource_size(struct resource *resource)
     57 {
     58 	return resource->end - resource->start + 1;
     59 }
     60 
     61 static inline bool
     62 resource_contains(struct resource *r1, struct resource *r2)
     63 {
     64 	if (r1->r_bst != r2->r_bst)
     65 		return false;
     66 	return r1->start <= r2->start && r2->end <= r1->end;
     67 }
     68 
     69 static inline void
     70 release_resource(struct resource *resource)
     71 {
     72 	bus_space_free(resource->r_bst, resource->r_bsh,
     73 	    resource_size(resource));
     74 }
     75 
     76 #endif  /* _LINUX_IOPORT_H_ */
     77