65 lines
2.3 KiB
ArmAsm
65 lines
2.3 KiB
ArmAsm
/*
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* $NetBSD: start.s,v 1.5 1998/01/05 20:51:45 perry Exp $
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*
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* Copyright (c) 1995 Charles D. Cranor
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles D. Cranor.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* start: at address 0x4000, load at 0xa000 (so put stack at 0x9ff0)
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*/
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.text
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.globl start
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start:
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movb #0,_reboot
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jra Ldoit
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restart:
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movb #1,_reboot | fall through
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Ldoit:
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movl #0x00006ff0,sp
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jsr _sboot
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Lname:
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.ascii "sboot\0"
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.globl _go
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_go:
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clrl d0 | dev lun
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clrl d1 | ctrl lun
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movl #0x2c, d4 | flags for IPL
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movl #0xfffe1800, a0 | address of "disk" ctrl
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movl sp@(4), a1 | entry point of loaded program
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movl d0, a2 | media config block (NULL)
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movl sp@(8), a3 | nb args (start)
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movl sp@(12), a4 | nb end args
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movl #Lname, a5 | args
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movl #Lname+5, a6 | end args
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| SRT0 will set stack
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jmp a1@ | GO!
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