start.c revision 124139 
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: head/sys/boot/powerpc/ofw/start.c 124139 2004-01-04 23:21:18Z obrien $");
35
36#include <stand.h>
37#include "libofw.h"
38
39void startup(void *, int, int (*)(void *), char *, int);
40
41#ifdef XCOFF_GLUE
42asm("				\n\
43	.text			\n\
44	.globl	_entry		\n\
45_entry:				\n\
46	.long	_start,0,0	\n\
47");
48#endif
49
50__asm("				\n\
51	.data			\n\
52stack:				\n\
53	.space	16388		\n\
54				\n\
55	.text			\n\
56	.globl	_start		\n\
57_start:				\n\
58	li	%r8,0		\n\
59	li	%r9,0x100	\n\
60	mtctr	%r9		\n\
611:				\n\
62	dcbf	%r0,%r8		\n\
63	icbi	%r0,%r8		\n\
64	addi	%r8,%r8,0x20	\n\
65	bdnz	1b		\n\
66	sync			\n\
67	isync			\n\
68				\n\
69	lis	%r1,stack@ha	\n\
70	addi	%r1,%r1,stack@l	\n\
71	addi	%r1,%r1,8192	\n\
72				\n\
73	mfmsr	%r8		\n\
74	li	%r0,0		\n\
75	mtmsr	%r0		\n\
76	isync			\n\
77				\n\
78	mtibatu	0,%r0		\n\
79	mtibatu	1,%r0		\n\
80	mtibatu	2,%r0		\n\
81	mtibatu	3,%r0		\n\
82	mtdbatu	0,%r0		\n\
83	mtdbatu	1,%r0		\n\
84	mtdbatu	2,%r0		\n\
85	mtdbatu	3,%r0		\n\
86				\n\
87	li	%r9,0x12     /* BATL(0, BAT_M, BAT_PP_RW) */ \n\
88	mtibatl	0,%r9		\n\
89	mtdbatl	0,%r9		\n\
90	li	%r9,0x1ffe   /* BATU(0, BAT_BL_256M, BAT_Vs) */ \n\
91	mtibatu	0,%r9		\n\
92	mtdbatu	0,%r9		\n\
93	isync			\n\
94				\n\
95	mtmsr	%r8		\n\
96	isync			\n\
97				\n\
98	b	startup		\n\
99");
100
101void
102startup(void *vpd, int res, int (*openfirm)(void *), char *arg, int argl)
103{
104	main(openfirm);
105}
106