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2fea643112
Compile sys/dev/mem/memutil.c for all supported platforms and remove now unnecessary dev_mem_md_init(). Consistently define mem_range_softc from mem.c for all platforms. Add missing #include guards for machine/memdev.h and sys/memrange.h. Clean up some nearby style(9) nits. MFC after: 1 month
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*-
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* Copyright (c) 2004 Mark R V Murray
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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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* in this position and unchanged.
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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 AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN 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 USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/memrange.h>
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#include <sys/rwlock.h>
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#include <sys/systm.h>
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static struct rwlock mr_lock;
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/*
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* Implementation-neutral, kernel-callable functions for manipulating
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* memory range attributes.
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*/
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void
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mem_range_init(void)
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{
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if (mem_range_softc.mr_op == NULL)
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return;
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rw_init(&mr_lock, "memrange");
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mem_range_softc.mr_op->init(&mem_range_softc);
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}
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void
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mem_range_destroy(void)
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{
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if (mem_range_softc.mr_op == NULL)
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return;
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rw_destroy(&mr_lock);
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}
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int
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mem_range_attr_get(struct mem_range_desc *mrd, int *arg)
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{
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int nd;
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if (mem_range_softc.mr_op == NULL)
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return (EOPNOTSUPP);
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nd = *arg;
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rw_rlock(&mr_lock);
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if (nd == 0)
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*arg = mem_range_softc.mr_ndesc;
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else
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bcopy(mem_range_softc.mr_desc, mrd, nd * sizeof(*mrd));
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rw_runlock(&mr_lock);
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return (0);
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}
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int
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mem_range_attr_set(struct mem_range_desc *mrd, int *arg)
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{
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int ret;
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if (mem_range_softc.mr_op == NULL)
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return (EOPNOTSUPP);
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rw_wlock(&mr_lock);
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ret = mem_range_softc.mr_op->set(&mem_range_softc, mrd, arg);
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rw_wunlock(&mr_lock);
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return (ret);
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}
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