98 lines
3.0 KiB
ArmAsm
98 lines
3.0 KiB
ArmAsm
/* $NetBSD: _context_u.S,v 1.2 2003/01/18 10:34:22 thorpej Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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 <machine/asm.h>
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#include "assym.h"
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#define NOTREACHED illtrap 10
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.global _C_LABEL(setcontext)
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/*
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* For voluntary context switches save/restore take care
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* of caller's window, the only registers which should be
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* saved are frame pointer and return address
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*/
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#define GETC(reg) \
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stx %i6, [ reg + UC_GREGS + _REG_O6 * 8 ] ; \
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add %i7, 8, %l0 ; \
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stx %l0, [ reg + UC_GREGS + _REG_PC * 8 ] ; \
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\
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sethi %hi(0x40000000), %l1 ; \
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or %l1, _UC_CPU, %l1 ; \
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\
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st %l1, [ reg + UC_FLAGS ]
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#define SETC(reg) \
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ld [ reg + UC_FLAGS ], %l0 ; \
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sethi %hi(0x40000000), %l1 ; \
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andcc %l0, %l1, %g0 ; \
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bz,a,pn %icc,1f ; \
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nop ; \
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\
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ldx [ reg + UC_GREGS + _REG_PC * 8 ], %i7 ; \
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ldx [ reg + UC_GREGS + _REG_O6 * 8 ], %i6 ; \
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; \
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jmpl %i7, %g0 ; \
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restore ; \
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1: call _C_LABEL(setcontext) ; \
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mov reg, %o0
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ENTRY(_getcontext_u)
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save %sp, -CC64FSZ, %sp
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flushw ! XXX
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GETC(%i0)
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clr %i0
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ret
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restore
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ENTRY(_setcontext_u)
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save %sp, -CC64FSZ, %sp
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flushw
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mov %i0, %o0
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SETC(%o0)
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NOTREACHED
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ENTRY(_swapcontext_u)
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save %sp, -CC64FSZ, %sp
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flushw
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GETC(%i0)
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mov %i1, %o0
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SETC(%o0)
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NOTREACHED
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