| // SPDX-License-Identifier: GPL-2.0-or-later | |
| /* | |
| * Device tree support | |
| * | |
| * Copyright (C) 2013, 2015 Altera Corporation | |
| * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> | |
| * | |
| * Based on MIPS support for CONFIG_OF device tree support | |
| * | |
| * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com> | |
| */ | |
| #include <linux/init.h> | |
| #include <linux/types.h> | |
| #include <linux/memblock.h> | |
| #include <linux/of.h> | |
| #include <linux/of_fdt.h> | |
| #include <linux/io.h> | |
| #include <asm/sections.h> | |
| void __init early_init_devtree(void *params) | |
| { | |
| __be32 __maybe_unused *dtb = (u32 *)__dtb_start; | |
| #if defined(CONFIG_NIOS2_DTB_AT_PHYS_ADDR) | |
| if (be32_to_cpup((__be32 *)CONFIG_NIOS2_DTB_PHYS_ADDR) == | |
| OF_DT_HEADER) { | |
| params = (void *)CONFIG_NIOS2_DTB_PHYS_ADDR; | |
| early_init_dt_scan(params, __pa(params)); | |
| return; | |
| } | |
| #endif | |
| #ifdef CONFIG_BUILTIN_DTB | |
| if (be32_to_cpu((__be32) *dtb) == OF_DT_HEADER) | |
| params = (void *)__dtb_start; | |
| #endif | |
| early_init_dt_scan(params, __pa(params)); | |
| } |