| // 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 *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); |
| return; |
| } |
| #endif |
| if (be32_to_cpu((__be32) *dtb) == OF_DT_HEADER) |
| params = (void *)__dtb_start; |
| |
| early_init_dt_scan(params); |
| } |
