start.S revision 1.1.2.2
1 1.1.2.1 skrll /* $NetBSD: start.S,v 1.1.2.2 2004/09/18 14:33:33 skrll Exp $ */ 2 1.1 cdi 3 1.1 cdi /* 4 1.1 cdi * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 1.1 cdi * All rights reserved. 6 1.1 cdi * 7 1.1 cdi * This code is derived from software contributed to The NetBSD Foundation 8 1.1 cdi * by Wayne Knowles 9 1.1 cdi * 10 1.1 cdi * Redistribution and use in source and binary forms, with or without 11 1.1 cdi * modification, are permitted provided that the following conditions 12 1.1 cdi * are met: 13 1.1 cdi * 1. Redistributions of source code must retain the above copyright 14 1.1 cdi * notice, this list of conditions and the following disclaimer. 15 1.1 cdi * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 cdi * notice, this list of conditions and the following disclaimer in the 17 1.1 cdi * documentation and/or other materials provided with the distribution. 18 1.1 cdi * 3. All advertising materials mentioning features or use of this software 19 1.1 cdi * must display the following acknowledgement: 20 1.1 cdi * This product includes software developed by the NetBSD 21 1.1 cdi * Foundation, Inc. and its contributors. 22 1.1 cdi * 4. Neither the name of The NetBSD Foundation nor the names of its 23 1.1 cdi * contributors may be used to endorse or promote products derived 24 1.1 cdi * from this software without specific prior written permission. 25 1.1 cdi * 26 1.1 cdi * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 1.1 cdi * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 1.1 cdi * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 1.1 cdi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 1.1 cdi * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 1.1 cdi * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 1.1 cdi * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 1.1 cdi * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 1.1 cdi * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 1.1 cdi * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 1.1 cdi * POSSIBILITY OF SUCH DAMAGE. 37 1.1 cdi */ 38 1.1 cdi 39 1.1 cdi #include <mips/asm.h> 40 1.1 cdi 41 1.1 cdi LEAF(start) 42 1.1 cdi .set noreorder 43 1.1 cdi #ifdef __GP_SUPPORT__ 44 1.1 cdi la gp, _C_LABEL (_gp) 45 1.1 cdi #endif 46 1.1 cdi la sp, start - CALLFRAME_SIZ 47 1.1 cdi sw zero, CALLFRAME_RA(sp) # clear ra for debugger 48 1.1 cdi sw zero, CALLFRAME_SP(sp) # clear fp for debugger 49 1.1 cdi move s0, a0 # save argc 50 1.1 cdi move s1, a1 # save argv 51 1.1 cdi 52 1.1 cdi la a0, _C_LABEL (edata) # clear BSS 53 1.1 cdi move a1, zero 54 1.1 cdi la a2, _C_LABEL (end) 55 1.1 cdi jal _C_LABEL(memset) # memset(edata, 0, end - edata) 56 1.1 cdi subu a2, a2, a0 57 1.1 cdi 58 1.1 cdi move a0, s0 # restore argc 59 1.1 cdi jal _C_LABEL(main) # main(unsigned int) 60 1.1 cdi move a1, s1 # restore argv 61 1.1 cdi 62 1.1.2.1 skrll XLEAF(_xtt) 63 1.1 cdi jal _C_LABEL(cpu_reboot) # failed, reboot 64 1.1 cdi nop 65 1.1 cdi END(start) 66
Indexes created Fri Oct 03 17:10:05 GMT 2025