1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2019, STMicroelectronics - All Rights Reserved
6 #define LOG_CATEGORY LOGC_ARCH
10 #include <linux/libfdt.h>
11 #include <asm/arch/sys_proto.h>
12 #include <asm/sections.h>
13 #include <asm/system.h>
16 * Use the saved FDT address provided by TF-A at boot time (NT_FW_CONFIG =
17 * Non Trusted Firmware configuration file) when the pointer is valid
19 void *board_fdt_blob_setup(int *err)
21 unsigned long nt_fw_dtb = get_stm32mp_bl2_dtb();
23 log_debug("%s: nt_fw_dtb=%lx\n", __func__, nt_fw_dtb);
26 /* use external device tree only if address is valid */
27 if (nt_fw_dtb >= STM32_DDR_BASE) {
28 if (fdt_magic(nt_fw_dtb) == FDT_MAGIC)
29 return (void *)nt_fw_dtb;
30 log_debug("%s: DTB not found.\n", __func__);
32 log_debug("%s: fall back to builtin DTB, %p\n", __func__, _end);