~funderscore blog cgit wiki get in touch
aboutsummaryrefslogtreecommitdiff
blob: 24d04dcf0f99e73ffe894b5a7f1123fca59c8c22 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
 * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
 */

#define LOG_CATEGORY LOGC_ARCH

#include <common.h>
#include <log.h>
#include <linux/libfdt.h>
#include <asm/arch/sys_proto.h>
#include <asm/sections.h>
#include <asm/system.h>

/*
 * Use the saved FDT address provided by TF-A at boot time (NT_FW_CONFIG =
 * Non Trusted Firmware configuration file) when the pointer is valid
 */
void *board_fdt_blob_setup(int *err)
{
	unsigned long nt_fw_dtb = get_stm32mp_bl2_dtb();

	log_debug("%s: nt_fw_dtb=%lx\n", __func__, nt_fw_dtb);

	*err = 0;
	/* use external device tree only if address is valid */
	if (nt_fw_dtb >= STM32_DDR_BASE) {
		if (fdt_magic(nt_fw_dtb) == FDT_MAGIC)
			return (void *)nt_fw_dtb;
		log_debug("%s: DTB not found.\n", __func__);
	}
	log_debug("%s: fall back to builtin DTB, %p\n", __func__, &_end);

	return (void *)&_end;
}