/* * $NetBSD: start.s,v 1.8 2011/02/01 20:19:31 chuck Exp $ * * Copyright (c) 1995 Charles D. Cranor * All rights reserved. * * 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 AUTHOR ``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 AUTHOR 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: at address 0x4000, load at 0xa000 (so put stack at 0x9ff0) */ #include <m68k/asm.h> .text ASENTRY_NOPROFILE(_start) ASENTRY_NOPROFILE(start) movb #0,_C_LABEL(reboot) jra Ldoit restart: movb #1,_C_LABEL(reboot) | fall through Ldoit: movl #0x00006ff0,%sp jsr _C_LABEL(sboot) Lname: .ascii "sboot\0" ENTRY_NOPROFILE(go) clrl %d0 | dev lun clrl %d1 | ctrl lun movl #0x2c, %d4 | flags for IPL movl #0xfffe1800, %a0 | address of "disk" ctrl movl %sp@(4), %a1 | entry point of loaded program movl %d0, %a2 | media config block (NULL) movl %sp@(8), %a3 | nb args (start) movl %sp@(12), %a4 | nb end args movl #Lname, %a5 | args movl #Lname+5, %a6 | end args | SRT0 will set stack jmp %a1@ | GO! |