1*2fe8fb19SBen Gras/* $NetBSD: swapcontext.S,v 1.3 2008/04/28 20:22:55 martin Exp $ */ 2*2fe8fb19SBen Gras 3*2fe8fb19SBen Gras/*- 4*2fe8fb19SBen Gras * Copyright (c) 2001 The NetBSD Foundation, Inc. 5*2fe8fb19SBen Gras * All rights reserved. 6*2fe8fb19SBen Gras * 7*2fe8fb19SBen Gras * This code is derived from software contributed to The NetBSD Foundation 8*2fe8fb19SBen Gras * by Klaus Klein. 9*2fe8fb19SBen Gras * 10*2fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 11*2fe8fb19SBen Gras * modification, are permitted provided that the following conditions 12*2fe8fb19SBen Gras * are met: 13*2fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 14*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 15*2fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 16*2fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 17*2fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 18*2fe8fb19SBen Gras * 19*2fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20*2fe8fb19SBen Gras * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21*2fe8fb19SBen Gras * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22*2fe8fb19SBen Gras * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23*2fe8fb19SBen Gras * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24*2fe8fb19SBen Gras * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25*2fe8fb19SBen Gras * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26*2fe8fb19SBen Gras * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27*2fe8fb19SBen Gras * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28*2fe8fb19SBen Gras * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29*2fe8fb19SBen Gras * POSSIBILITY OF SUCH DAMAGE. 30*2fe8fb19SBen Gras */ 31*2fe8fb19SBen Gras 32*2fe8fb19SBen Gras#include "SYS.h" 33*2fe8fb19SBen Gras 34*2fe8fb19SBen GrasNESTED(swapcontext, 2, 24, ra, IM_RA|IM_A0|IM_A1, 0) 35*2fe8fb19SBen Gras LDGP(pv) 36*2fe8fb19SBen Gras lda sp, -24(sp) 37*2fe8fb19SBen Gras stq ra, (24- 8)(sp) /* must save ra, oucp, ucp */ 38*2fe8fb19SBen Gras stq a0, (24-16)(sp) 39*2fe8fb19SBen Gras stq a1, (24-24)(sp) 40*2fe8fb19SBen Gras CALL(_getcontext) /* getcontext(oucp) */ 41*2fe8fb19SBen Gras ldq t0, (24-16)(sp) 42*2fe8fb19SBen Gras bne v0, Lerr 43*2fe8fb19SBen Gras ldq t1, (24- 8)(sp) 44*2fe8fb19SBen Gras stq t1, (56 + 26 * 8)(t0) /* Adjust saved RA */ 45*2fe8fb19SBen Gras stq t1, (56 + 32 * 8)(t0) /* Adjust saved PC */ 46*2fe8fb19SBen Gras lda t1, 24(sp) 47*2fe8fb19SBen Gras stq t1, (56 + 30 * 8)(t0) /* Adjust saved SP */ 48*2fe8fb19SBen Gras 49*2fe8fb19SBen Gras ldq a0, (24-24)(sp) 50*2fe8fb19SBen Gras CALL(setcontext) /* setcontext(ucp) */ 51*2fe8fb19SBen GrasLerr: 52*2fe8fb19SBen Gras ldq ra, (24- 8)(sp) 53*2fe8fb19SBen Gras lda sp, 24(sp) 54*2fe8fb19SBen Gras RET 55*2fe8fb19SBen GrasEND(swapcontext) 56