1/*  *********************************************************************
2    *  Broadcom Common Firmware Environment (CFE)
3    *
4    *  Mini startup module for CFE apps		File: minicrt0.S
5    *
6    *  About the most minimal startup routine you can get.
7    *
8    *  Author:  Mitch Lichtenberg
9    *
10    *********************************************************************
11    *
12    *  Copyright 2000,2001,2002,2003
13    *  Broadcom Corporation. All rights reserved.
14    *
15    *  This software is furnished under license and may be used and
16    *  copied only in accordance with the following terms and
17    *  conditions.  Subject to these conditions, you may download,
18    *  copy, install, use, modify and distribute modified or unmodified
19    *  copies of this software in source and/or binary form.  No title
20    *  or ownership is transferred hereby.
21    *
22    *  1) Any source code used, modified or distributed must reproduce
23    *     and retain this copyright notice and list of conditions
24    *     as they appear in the source file.
25    *
26    *  2) No right is granted to use any trade name, trademark, or
27    *     logo of Broadcom Corporation.  The "Broadcom Corporation"
28    *     name may not be used to endorse or promote products derived
29    *     from this software without the prior written permission of
30    *     Broadcom Corporation.
31    *
32    *  3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
33    *     IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
34    *     WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
35    *     PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
36    *     SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
37    *     PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
38    *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
39    *     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
40    *     GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
41    *     BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
42    *     OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
43    *     TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
44    *     THE POSSIBILITY OF SUCH DAMAGE.
45    ********************************************************************* */
46
47
48#include "sbmips.h"
49
50/*
51 * This module should be linked first!
52 */
53
54#define STACK_SIZE 8192
55
56		.bss
57		.comm	stack_bottom,STACK_SIZE
58		.comm	__junk,4
59
60		.text
61
62		.extern appletmain
63		.globl __start
64
65__start:
66
67	/*
68	 * Set up our GP (in case we're using it)
69	 * Set up the stack pointer (don't use CFE's stack)
70	 */
71
72		la	gp,_gp
73		la	sp,stack_bottom+STACK_SIZE-32
74
75	/*
76	 * Zero BSS.  No need to do this very efficiently, do it
77	 * 32 bits at a time to ensure we can compile this
78	 * with -mips1.
79	 */
80
81		la	t0,_fbss
82		la	t1,_end
83
841:		sw	zero,0(t0)
85		add	t0,4
86		blt	t0,t1,1b
87
88	/*
89	 * Jump to main program.  Note that we didn't trash A0..A3,
90	 * our application will need them.  So, if you add stuff here,
91	 * be sure to preserve the A0..A3 registers for the C code.
92	 */
93
94		j	appletmain
95
96