xref: /freebsd/stand/powerpc/ofw/start.c (revision 1de7b4b805ddbf2429da511c053686ac4591ed89)
1 /* $NetBSD: Locore.c,v 1.7 2000/08/20 07:04:59 tsubai Exp $ */
2 /*-
3  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
4  * Copyright (C) 1995, 1996 TooLs GmbH.
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  * 3. All advertising materials mentioning features or use of this software
16  *    must display the following acknowledgement:
17  *	This product includes software developed by TooLs GmbH.
18  * 4. The name of TooLs GmbH may not be used to endorse or promote products
19  *    derived from this software without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
27  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
29  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
30  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35 
36 #include <stand.h>
37 #include "libofw.h"
38 
39 void startup(void *, int, int (*)(void *), char *, int);
40 
41 __asm("				\n\
42 	.data			\n\
43 	.align 4		\n\
44 stack:				\n\
45 	.space	16388		\n\
46 				\n\
47 	.text			\n\
48 	.globl	_start		\n\
49 _start:				\n\
50 	lis	%r1,stack@ha	\n\
51 	addi	%r1,%r1,stack@l	\n\
52 	addi	%r1,%r1,8192	\n\
53 				\n\
54 	/* Clear the .bss!!! */	\n\
55 	li      %r0,0		\n\
56 	lis     %r8,_edata@ha	\n\
57 	addi    %r8,%r8,_edata@l\n\
58 	lis     %r9,_end@ha	\n\
59 	addi    %r9,%r9,_end@l	\n\
60 				\n\
61 1:	cmpw    0,%r8,%r9	\n\
62 	bge     2f		\n\
63 	stw     %r0,0(%r8)	\n\
64 	addi    %r8,%r8,4	\n\
65 	b       1b		\n\
66 				\n\
67 2:	b	startup		\n\
68 ");
69 
70 void
71 startup(void *vpd, int res, int (*openfirm)(void *), char *arg, int argl)
72 {
73 	main(openfirm);
74 }
75