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scoutos / prex-0.9.0 / bsp / hal / ppc / arch / cpu.c @ 03e9c04a

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/*-
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 * Copyright (c) 2009, Kohsuke Ohtani
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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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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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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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/*
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 * cpu.c - cpu dependent routines
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 */
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#include <kernel.h>
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#include <cpu.h>
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#include <locore.h>
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#include <cpufunc.h>
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static int curspl = 15;
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int
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splhigh(void)
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{
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        int oldspl = curspl;
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        sploff();
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        curspl = 15;
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        return oldspl;
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}
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int
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spl0(void)
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{
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        int oldspl = curspl;
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        curspl = 0;
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        splon();
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        return oldspl;
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}
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void
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splx(int s)
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{
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        curspl = s;
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        if (curspl == 0)
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                splon();
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        else
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                sploff();
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}
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int
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copyin(const void *uaddr, void *kaddr, size_t len)
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{
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        if (user_area(uaddr) && user_area(uaddr + len)) {
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                memcpy(kaddr, uaddr, len);
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                return 0;
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        }
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        return EFAULT;
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}
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int
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copyout(const void *kaddr, void *uaddr, size_t len)
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{
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        if (user_area(uaddr) && user_area(uaddr + len)) {
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                memcpy(uaddr, kaddr, len);
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                return 0;
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        }
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        return EFAULT;
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}
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int
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copyinstr(const void *uaddr, void *kaddr, size_t len)
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{
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        if (user_area(uaddr) && user_area(uaddr + len)) {
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                strlcpy(kaddr, uaddr, len);
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                return 0;
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        }
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        return EFAULT;
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}