/* $NetBSD: start.S,v 1.23 2011/03/26 15:49:26 tsutsui Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jonathan Stone, Michael Hitch and Simon Burge. * * 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. */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)start.s 8.2 (Berkeley) 1/21/94 */ /* * start.s - * * Contains code that is the first executed at boot time. * * Copyright (C) 1989 Digital Equipment Corporation. * Permission to use, copy, modify, and distribute this software and * its documentation for any purpose and without fee is hereby granted, * provided that the above copyright notice appears in all copies. * Digital Equipment Corporation makes no representations about the * suitability of this software for any purpose. It is provided "as is" * without express or implied warranty. * * from: Header: /sprite/src/boot/decprom/ds3100.md/RCS/start.s, * v 1.1 90/02/16 16:19:39 shirriff Exp SPRITE (DECWRL) */ #include <mips/asm.h> #include <mips/cpuregs.h> #include <machine/dec_prom.h> .extern callv, 4 .globl start start: .set noreorder #ifdef __GP_SUPPORT__ la gp, _C_LABEL (_gp) #endif la sp, start - CALLFRAME_SIZ sw zero, CALLFRAME_RA(sp) # Zero out old ra for debugger sw zero, CALLFRAME_SP(sp) # Zero out old fp for debugger move s0, a0 # save argc move s1, a1 # save argv beq a2, DEC_REX_MAGIC, 1f # jump if boot from DS5000 move s3, a3 # BDslot: save call vector la s3, _C_LABEL(callvec) # init call vector 1: 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 sw s3, _C_LABEL(callv) # save call vector move a0, s0 # restore argc jal _C_LABEL(main) # main(argc, argv) move a1, s1 # restore argv j _C_LABEL(prom_restart) # restart... nop .set reorder # make as(1) handle hazard and BDslot LEAF(prom_restart) XLEAF(_rtt) lw v0, _C_LABEL (callv) lw v0, 0x9C(v0) /* halt */ move a0, zero /* Don't print anything. */ move a1, zero j v0 END(prom_restart) LEAF(prom_open) li v0, DEC_PROM_OPEN j v0 END(prom_open) #ifndef LIBSA_NO_DEV_CLOSE LEAF(prom_close) li v0, DEC_PROM_CLOSE j v0 END(prom_close) #endif LEAF(prom_lseek) li v0, DEC_PROM_LSEEK j v0 END(prom_lseek) LEAF(prom_read) li v0, DEC_PROM_READ j v0 END(prom_read) LEAF(prom_write) li v0, DEC_PROM_WRITE j v0 END(prom_write)
