1/*-
2 * Copyright (c) 2016 Stanislav Galabov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD$
27 */
28
29#include <machine/asm.h>
30
31	.text
32	.extern _C_LABEL(main)
33	.weak	_DYNAMIC
34
35/*
36 * Entry point to the loader that U-Boot passes control to.
37 */
38ENTRY(_start)
39	PTR_S	sp, uboot_address
40	j	main
41	nop
42END(_start)
43
44/*
45 * syscall()
46 */
47ENTRY(syscall)
48	PTR_S	ra, ret_address
49	PTR_L	t9, syscall_ptr
50	jalr	t9
51	nop
52	PTR_L	ra, ret_address
53	jr	ra
54	nop
55END(syscall)
56
57/*
58 * Data section
59 */
60	.data
61	.align	8
62	.globl	syscall_ptr
63syscall_ptr:
64	.dword	0
65
66	.globl	uboot_address
67uboot_address:
68	.dword	0
69
70ret_address:
71	.dword	0
72