1/* $NetBSD: start.S,v 1.5 2008/04/28 20:23:34 martin Exp $ */ 2 3/*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jonathan Stone, Michael Hitch and Simon Burge. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32/* 33 * Copyright (c) 1992, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * This code is derived from software contributed to Berkeley by 37 * Ralph Campbell. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. Neither the name of the University nor the names of its contributors 48 * may be used to endorse or promote products derived from this software 49 * without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 54 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 57 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 * 63 * @(#)start.s 8.2 (Berkeley) 1/21/94 64 */ 65 66/* 67 * start.s - 68 * 69 * Contains code that is the first executed at boot time. 70 * 71 * Copyright (C) 1989 Digital Equipment Corporation. 72 * Permission to use, copy, modify, and distribute this software and 73 * its documentation for any purpose and without fee is hereby granted, 74 * provided that the above copyright notice appears in all copies. 75 * Digital Equipment Corporation makes no representations about the 76 * suitability of this software for any purpose. It is provided "as is" 77 * without express or implied warranty. 78 * 79 * from: Header: /sprite/src/boot/decprom/ds3100.md/RCS/start.s, 80 * v 1.1 90/02/16 16:19:39 shirriff Exp SPRITE (DECWRL) 81 */ 82 83#include <mips/asm.h> 84#include <mips/cpuregs.h> 85 86#include "assym.h" 87 88 .globl start 89start: 90 .set noreorder 91#ifdef __GP_SUPPORT__ 92 PTR_LA gp, _C_LABEL (_gp) 93#endif 94 /* 95 * We assume the bootprom isn't expecting us to preserve the saved 96 * registers. 97 */ 98 move s0, a0 # save argc 99 move s1, a1 # save argv 100 move s2, a2 # save envp 101 move s3, ra # save RA 102 PTR_LA v0, 0x80001000 # ARCBIOS_SPB 103 PTR_LA a0, _C_LABEL (edata) # clear BSS 104 INT_L v0, SPB_FirmwareVector(v0) # FirmwareVector 105 move a1, zero 106 PTR_S v0, _C_LABEL(ARCBIOS) # save ARCBIOS 107 PTR_LA a2, _C_LABEL (end) 108 jal _C_LABEL(memset) # memset(edata, 0, end - edata) 109 PTR_SUBU a2, a2, a0 110 move a0, s0 # restore argc 111 move a1, s1 # restore argv 112 move a2, s2 # restore envp 113 j _C_LABEL(main) # main(argc, argv) 114 move ra, s3 # restore RA 115 116 .globl _rtt 117_rtt: 118 j ra # XXXX return to PROM? 119 120 .data 121 .global ARCBIOS 122ARCBIOS: PTR_WORD 0 123