Annotation of sys/arch/jornada/stand/boot/start.S, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: start.S,v 1.1 2006/07/28 17:12:06 kettenis Exp $ */
2: /* $NetBSD: srtbegin.S,v 1.7 2005/12/11 12:17:10 christos Exp $ */
3:
4: /*
5: * Copyright (c) 2002 Wasabi Systems, Inc.
6: * All rights reserved.
7: *
8: * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed for the NetBSD Project by
21: * Wasabi Systems, Inc.
22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23: * or promote products derived from this software without specific prior
24: * written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
38:
39: #include <machine/asm.h>
40: #include <arm/armreg.h>
41:
42: #define STACKSIZE 8192
43:
44: ENTRY(start)
45: /*
46: * We assume we've been loaded VA==PA, or that the MMU
47: * is disabled. Make sure the MMU is disabled so that
48: * we don't have to care about the caches.
49: */
50: /* Clear the BSS. */
51: adr r1, Lbss
52: ldmia r1, {r1, r2}
53: sub r2, r2, r1
54: mov r3, #0
55:
56: 1: strb r3, [r1], #0x01
57: subs r2, r2, #0x01
58: bgt 1b
59:
60: /* Set the stack pointer */
61: adr r1, Lstack
62: ldr r1, [r1]
63: add sp, r1, #STACKSIZE
64:
65: b _C_LABEL(main)
66:
67: Ltext:
68: .word _C_LABEL(__text_store)
69: .word _C_LABEL(start)
70: .word _C_LABEL(_etext)
71:
72: Ldata:
73: .word _C_LABEL(__data_store)
74: .word _C_LABEL(__data_start)
75:
76: Lbss:
77: .word _C_LABEL(_edata)
78: .word _C_LABEL(_end)
79:
80: Lstack:
81: .word Lstackspace
82:
83: .comm Lstackspace, STACKSIZE
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