1/* 2 * $NetBSD: start.s,v 1.7 2000/12/04 20:31:16 scw Exp $ 3 * 4 * Copyright (c) 1995 Charles D. Cranor 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27/* 28 * start: at address 0x4000, load at 0xa000 (so put stack at 0x9ff0) 29 */ 30 31#include <m68k/asm.h> 32 33 .text 34ASENTRY_NOPROFILE(_start) 35ASENTRY_NOPROFILE(start) 36 movb #0,_C_LABEL(reboot) 37 jra Ldoit 38restart: 39 movb #1,_C_LABEL(reboot) | fall through 40 41Ldoit: 42 movl #0x00006ff0,%sp 43 jsr _C_LABEL(sboot) 44 45Lname: 46 .ascii "sboot\0" 47 48ENTRY_NOPROFILE(go) 49 clrl %d0 | dev lun 50 clrl %d1 | ctrl lun 51 movl #0x2c, %d4 | flags for IPL 52 movl #0xfffe1800, %a0 | address of "disk" ctrl 53 movl %sp@(4), %a1 | entry point of loaded program 54 movl %d0, %a2 | media config block (NULL) 55 movl %sp@(8), %a3 | nb args (start) 56 movl %sp@(12), %a4 | nb end args 57 movl #Lname, %a5 | args 58 movl #Lname+5, %a6 | end args 59 | SRT0 will set stack 60 jmp %a1@ | GO! 61