4 * Copyright (C) 2013, 2015 Altera Corporation
5 * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
7 * Based on MIPS support for CONFIG_OF device tree support
9 * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #include <linux/init.h>
27 #include <linux/types.h>
28 #include <linux/bootmem.h>
30 #include <linux/of_fdt.h>
33 #include <asm/sections.h>
35 void __init
early_init_dt_add_memory_arch(u64 base
, u64 size
)
37 u64 kernel_start
= (u64
)virt_to_phys(_text
);
40 (kernel_start
>= base
) && (kernel_start
< (base
+ size
)))
45 int __init
early_init_dt_reserve_memory_arch(phys_addr_t base
, phys_addr_t size
,
48 reserve_bootmem(base
, size
, BOOTMEM_DEFAULT
);
52 void __init
early_init_devtree(void *params
)
54 __be32
*dtb
= (u32
*)__dtb_start
;
55 #if defined(CONFIG_NIOS2_DTB_AT_PHYS_ADDR)
56 if (be32_to_cpup((__be32
*)CONFIG_NIOS2_DTB_PHYS_ADDR
) ==
58 params
= (void *)CONFIG_NIOS2_DTB_PHYS_ADDR
;
59 early_init_dt_scan(params
);
63 if (be32_to_cpu((__be32
) *dtb
) == OF_DT_HEADER
)
64 params
= (void *)__dtb_start
;
66 early_init_dt_scan(params
);