/* $NetBSD: start.S,v 1.3 2008/04/28 20:23:29 martin Exp $ */ /* * Copyright (c) 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Wayne Knowles * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <mips/asm.h> #include <mips/cpuregs.h> #include <machine/prom.h> LEAF(start) .set noreorder #ifdef __GP_SUPPORT__ la gp, _C_LABEL (_gp) #endif la sp, start - CALLFRAME_SIZ sw zero, CALLFRAME_RA(sp) # clear ra for debugger sw zero, CALLFRAME_SP(sp) # clear fp for debugger move s0, a0 # save argc move s1, a1 # save argv la a0, _C_LABEL (edata) # clear BSS move a1, zero la a2, _C_LABEL (end) jal _C_LABEL(memset) # memset(edata, 0, end - edata) subu a2, a2, a0 move a0, s0 # restore argc jal _C_LABEL(main) # main(argc, argv) move a1, s1 # restore argv XLEAF(_rtt) la t9, _C_LABEL(prom_restart) # restart... j t9 move a0, zero END(start) |