1/*
2 * The head-file for SH-Mobile ARM platforms
3 *
4 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
5 * Simon Horman <horms@verge.net.au>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
19 */
20
21#ifdef CONFIG_ZBOOT_ROM
22
23	.section	".start", "ax"
24
25	/* load board-specific initialization code */
26#include <mach/zboot.h>
27
28	adr	r0, dtb_info
29	ldmia	r0, {r1, r3, r4, r5, r7}
30
31	sub	r0, r0, r1		@ calculate the delta offset
32	add	r5, r5, r0		@ _edata
33
34	ldr	lr, [r5, #0]		@ check if valid DTB is present
35	cmp	lr, r3
36	bne	0f
37
38	add	r9, r7, #31		@ rounded up to a multiple
39	bic	r9, r9, #31		@ ... of 32 bytes
40
41	add	r6, r9, r5		@ copy from _edata
42	add	r9, r9, r4		@ to MEMORY_START
43
441:	ldmdb	r6!, {r0 - r3, r10 - r12, lr}
45	cmp	r6, r5
46	stmdb	r9!, {r0 - r3, r10 - r12, lr}
47	bhi	1b
48
49	/* Success: Zero board ID, pointer to start of memory for atag/dtb */
50	mov	r7, #0
51	mov	r8, r4
52	b	2f
53
54	.align	2
55dtb_info:
56	.word	dtb_info
57#ifndef __ARMEB__
58	.word	0xedfe0dd0		@ sig is 0xd00dfeed big endian
59#else
60	.word	0xd00dfeed
61#endif
62	.word	MEMORY_START
63	.word	_edata
64	.word	0x4000			@ maximum DTB size
650:
66	/* Failure: Zero board ID, NULL atag/dtb */
67	mov 	r7, #0
68	mov	r8, #0			@ pass null pointer as atag
692 :
70
71#endif /* CONFIG_ZBOOT_ROM */
72