b40ce02a2f
new platform module. These are probed in early boot, and have the responsibility of determining the layout of physical memory, determining the CPU timebase frequency, and handling the zoo of SMP mechanisms found on PowerPC. Reviewed by: marcel, raj Book-E parts by: raj
89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
/*-
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* Copyright (c) 2005 Peter Grehan
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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 _MACHINE_PLATFORMVAR_H_
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#define _MACHINE_PLATFORMVAR_H_
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/*
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* A PowerPC platform 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 platform_method_t chrp_methods[] = {
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* PLATFORMMETHOD(platform_probe, chrp_probe),
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* PLATFORMMETHOD(platform_mem_regions, ofw_mem_regions),
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* ...
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* PLATFORMMETHOD(platform_smp_first_cpu, chrp_smp_first_cpu),
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* { 0, 0 }
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* };
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*
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* static platform_def_t chrp_platform = {
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* "chrp",
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* chrp_methods,
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* sizeof(chrp_platform_softc), // or 0 if no softc
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* };
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*
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* PLATFORM_DEF(chrp_platform);
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*/
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#include <sys/kobj.h>
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struct platform_kobj {
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/*
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* A platform 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 platform_mtx; /* available for instance use */
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void *platform_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. Platform 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 platform kernel object is
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* registered.
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*/
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#define PLATFORM_OPAQUESZ 64
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u_int platform_opaque[PLATFORM_OPAQUESZ];
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};
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typedef struct platform_kobj *platform_t;
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typedef struct kobj_class platform_def_t;
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#define platform_method_t kobj_method_t
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#define PLATFORMMETHOD KOBJMETHOD
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#define PLATFORM_DEF(name) DATA_SET(platform_set, name)
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#endif /* _MACHINE_PLATFORMVAR_H_ */
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