start.S revision 1.1.10.1
1 1.1 wdk /* $NetBSD: start.S,v 1.1.10.1 2002/12/11 06:11:21 thorpej Exp $ */ 2 1.1 wdk 3 1.1 wdk /* 4 1.1 wdk * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 1.1 wdk * All rights reserved. 6 1.1 wdk * 7 1.1 wdk * This code is derived from software contributed to The NetBSD Foundation 8 1.1 wdk * by Wayne Knowles 9 1.1 wdk * 10 1.1 wdk * Redistribution and use in source and binary forms, with or without 11 1.1 wdk * modification, are permitted provided that the following conditions 12 1.1 wdk * are met: 13 1.1 wdk * 1. Redistributions of source code must retain the above copyright 14 1.1 wdk * notice, this list of conditions and the following disclaimer. 15 1.1 wdk * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 wdk * notice, this list of conditions and the following disclaimer in the 17 1.1 wdk * documentation and/or other materials provided with the distribution. 18 1.1 wdk * 3. All advertising materials mentioning features or use of this software 19 1.1 wdk * must display the following acknowledgement: 20 1.1 wdk * This product includes software developed by the NetBSD 21 1.1 wdk * Foundation, Inc. and its contributors. 22 1.1 wdk * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1 wdk * contributors may be used to endorse or promote products derived 24 1.1 wdk * from this software without specific prior written permission. 25 1.1 wdk * 26 1.1 wdk * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1 wdk * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1 wdk * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1 wdk * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1 wdk * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1 wdk * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1 wdk * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1 wdk * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1 wdk * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1 wdk * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1 wdk * POSSIBILITY OF SUCH DAMAGE. 37 1.1 wdk */ 38 1.1 wdk 39 1.1 wdk #include <mips/asm.h> 40 1.1 wdk #include <mips/cpuregs.h> 41 1.1 wdk #include <machine/prom.h> 42 1.1 wdk 43 1.1 wdk LEAF(start) 44 1.1.10.1 thorpej .set noreorder 45 1.1 wdk #ifdef __GP_SUPPORT__ 46 1.1 wdk la gp, _C_LABEL (_gp) 47 1.1 wdk #endif 48 1.1 wdk la sp, start - CALLFRAME_SIZ 49 1.1 wdk sw zero, CALLFRAME_RA(sp) # clear ra for debugger 50 1.1 wdk sw zero, CALLFRAME_SP(sp) # clear fp for debugger 51 1.1 wdk move s0, a0 # save argc 52 1.1 wdk move s1, a1 # save argv 53 1.1 wdk 54 1.1 wdk la a0, _C_LABEL (edata) # clear BSS 55 1.1 wdk move a1, zero 56 1.1 wdk la a2, _C_LABEL (end) 57 1.1 wdk jal _C_LABEL(memset) # memset(edata, 0, end - edata) 58 1.1 wdk subu a2, a2, a0 59 1.1 wdk 60 1.1 wdk move a0, s0 # restore argc 61 1.1 wdk jal _C_LABEL(main) # main(argc, argv) 62 1.1 wdk move a1, s1 # restore argv 63 1.1 wdk 64 1.1 wdk XLEAF(_rtt) 65 1.1.10.1 thorpej la t9, _C_LABEL(prom_restart) # restart... 66 1.1.10.1 thorpej j t9 67 1.1.10.1 thorpej move a0, zero 68 1.1 wdk END(start) 69
Indexes created Mon Oct 13 04:09:54 GMT 2025