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      1  1.1  chuck /*
      2  1.8  chuck  * $NetBSD: start.s,v 1.8 2011/02/01 20:19:31 chuck Exp $
      3  1.1  chuck  *
      4  1.1  chuck  * Copyright (c) 1995 Charles D. Cranor
      5  1.1  chuck  * All rights reserved.
      6  1.1  chuck  *
      7  1.1  chuck  * Redistribution and use in source and binary forms, with or without
      8  1.1  chuck  * modification, are permitted provided that the following conditions
      9  1.1  chuck  * are met:
     10  1.1  chuck  * 1. Redistributions of source code must retain the above copyright
     11  1.1  chuck  *    notice, this list of conditions and the following disclaimer.
     12  1.1  chuck  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1  chuck  *    notice, this list of conditions and the following disclaimer in the
     14  1.1  chuck  *    documentation and/or other materials provided with the distribution.
     15  1.1  chuck  *
     16  1.1  chuck  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  1.1  chuck  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  1.1  chuck  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  1.1  chuck  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  1.1  chuck  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  1.1  chuck  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  1.1  chuck  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  1.1  chuck  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  1.1  chuck  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  1.1  chuck  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  1.1  chuck  */
     27  1.1  chuck /*
     28  1.1  chuck  * start: at address 0x4000, load at 0xa000 (so put stack at 0x9ff0)
     29  1.1  chuck  */
     30  1.1  chuck 
     31  1.6    scw #include <m68k/asm.h>
     32  1.6    scw 
     33  1.6    scw 	.text
     34  1.7    scw ASENTRY_NOPROFILE(_start)
     35  1.6    scw ASENTRY_NOPROFILE(start)
     36  1.6    scw 	movb	#0,_C_LABEL(reboot)
     37  1.1  chuck 	jra	Ldoit
     38  1.1  chuck restart:
     39  1.6    scw 	movb	#1,_C_LABEL(reboot) | fall through
     40  1.1  chuck 
     41  1.1  chuck Ldoit:
     42  1.6    scw 	movl	#0x00006ff0,%sp
     43  1.6    scw 	jsr _C_LABEL(sboot)
     44  1.1  chuck 
     45  1.2  chuck Lname:
     46  1.2  chuck 	.ascii "sboot\0"
     47  1.2  chuck 
     48  1.6    scw ENTRY_NOPROFILE(go)
     49  1.6    scw 	clrl	%d0		| dev lun
     50  1.6    scw 	clrl	%d1		| ctrl lun
     51  1.6    scw 	movl	#0x2c, %d4	| flags for IPL
     52  1.6    scw 	movl	#0xfffe1800, %a0	| address of "disk" ctrl
     53  1.6    scw 	movl	%sp@(4), %a1	| entry point of loaded program
     54  1.6    scw 	movl	%d0, %a2	| media config block (NULL)
     55  1.6    scw 	movl	%sp@(8), %a3	| nb args (start)
     56  1.6    scw 	movl	%sp@(12), %a4	| nb end args
     57  1.6    scw 	movl	#Lname, %a5	| args
     58  1.6    scw 	movl	#Lname+5, %a6	| end args
     59  1.2  chuck 				| SRT0 will set stack
     60  1.6    scw 	jmp	%a1@		| GO!
     61