b8ea2c8cad
Add fast softint support for PowerPC (though only booke uses it). Redo FPU/VEC support and add e500 SPE support. Rework trap/intrs to use a common trapframe format. Support SOFTFLOAT (no hardfloat or fpu emulation) for BookE.
70 lines
2.7 KiB
C
70 lines
2.7 KiB
C
/* $NetBSD: kcopy.c,v 1.2 2011/01/18 01:02:52 matt Exp $ */
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/*-
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* Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
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* Agency and which was developed by Matt Thomas of 3am Software Foundry.
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*
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* This material is based upon work supported by the Defense Advanced Research
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* Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
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* Contract No. N66001-09-C-2073.
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* Approved for Public Release, Distribution Unlimited
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: kcopy.c,v 1.2 2011/01/18 01:02:52 matt Exp $");
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#include <sys/param.h>
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#include <sys/cpu.h>
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#include <machine/pcb.h>
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/*
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* kcopy(const void *src, void *dst, size_t len);
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*
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* Copy len bytes from src to dst, aborting if we encounter a fatal
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* page fault.
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*
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* kcopy() _must_ save and restore the old fault handler since it is
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* called by uiomove(), which may be in the path of servicing a non-fatal
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* page fault.
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*/
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int
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kcopy(const void *src, void *dst, size_t len)
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{
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struct pcb * const pcb = lwp_getpcb(curlwp);
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struct faultbuf * const saved_onfault = pcb->pcb_onfault;
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struct faultbuf env;
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const int rv = setfault(&env);
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if (__predict_true(rv == 0))
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memcpy(dst, src, len);
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pcb->pcb_onfault = saved_onfault;
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return rv;
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}
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