91416fb268
of OFW access semantics, in order to allow future support for real-mode OF access and flattened device frees. OF client interface modules are implemented using KOBJ, in a similar way to the PPC PMAP modules. Because we need Open Firmware to be available before mutexes can be used on sparc64, changes are also included to allow KOBJ to be used very early in the boot process by only using the mutex once we know it has been initialized. Reviewed by: marius, grehan
90 lines
2.7 KiB
C
90 lines
2.7 KiB
C
/*-
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* Copyright (c) 2005 Peter Grehan
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* Copyright (c) 2008 Nathan Whitehorn
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _OFW_OFWVAR_H_
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#define _OFW_OFWVAR_H_
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/*
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* An Open Firmware client implementation is declared with a kernel object and
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* an associated method table, similar to a device driver.
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*
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* e.g.
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*
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* static ofw_method_t fdt_methods[] = {
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* OFWMETHOD(ofw_init, fdt_init),
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* OFWMETHOD(ofw_finddevice, fdt_finddevice),
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* ...
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* OFWMETHOD(ofw_nextprop, fdt_nextprop),
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* { 0, 0 }
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* };
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*
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* static ofw_def_t ofw_fdt = {
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* "ofw_fdt",
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* fdt_methods,
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* sizeof(fdt_softc), // or 0 if no softc
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* };
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*
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* OFW_DEF(ofw_fdt);
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*/
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#include <sys/kobj.h>
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struct ofw_kobj {
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/*
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* An OFW instance is a kernel object.
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*/
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KOBJ_FIELDS;
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/*
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* Utility elements that an instance may use
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*/
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struct mtx ofw_mtx; /* available for instance use */
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void *ofw_iptr; /* instance data pointer */
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/*
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* Opaque data that can be overlaid with an instance-private
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* structure. OFW code can test that this is large enough at
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* compile time with a sizeof() test againt it's softc. There
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* is also a run-time test when the MMU kernel object is
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* registered.
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*/
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#define OFW_OPAQUESZ 64
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u_int ofw_opaque[OFW_OPAQUESZ];
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};
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typedef struct ofw_kobj *ofw_t;
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typedef struct kobj_class ofw_def_t;
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#define ofw_method_t kobj_method_t
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#define OFWMETHOD KOBJMETHOD
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#define OFW_DEF(name) DATA_SET(ofw_set, name)
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#endif /* _OFW_OFWVAR_H_ */
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