projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 95acd4c7 LFT |
1 | /* |
| 2 | * Device tree support | |
| 3 | * | |
| 4 | * Copyright (C) 2013 Altera Corporation | |
| 5 | * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> | |
| 6 | * | |
| 7 | * Based on MIPS support for CONFIG_OF device tree support | |
| 8 | * | |
| 9 | * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com> | |
| 10 | * | |
| 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. | |
| 15 | * | |
| 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. | |
| 20 | * | |
| 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/>. | |
| 23 | * | |
| 24 | */ | |
| 25 | ||
| 26 | #include <linux/init.h> | |
| 27 | #include <linux/types.h> | |
| 28 | #include <linux/bootmem.h> | |
| 29 | #include <linux/of.h> | |
| 30 | #include <linux/of_fdt.h> | |
| 31 | #include <linux/io.h> | |
| 32 | ||
| 33 | #include <asm/sections.h> | |
| 34 | ||
| 35 | void __init early_init_dt_add_memory_arch(u64 base, u64 size) | |
| 36 | { | |
| 37 | u64 kernel_start = (u64)virt_to_phys(_text); | |
| 38 | ||
| 39 | if (!memory_size && | |
| 40 | (kernel_start >= base) && (kernel_start < (base + size))) | |
| 41 | memory_size = size; | |
| 42 | ||
| 43 | } | |
| 44 | ||
| 45 | void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) | |
| 46 | { | |
| 47 | return alloc_bootmem_align(size, align); | |
| 48 | } | |
| 49 | ||
| 50 | void __init early_init_devtree(void *params) | |
| 51 | { | |
| 52 | __be32 *dtb = (u32 *)__dtb_start; | |
| 53 | #if defined(CONFIG_NIOS2_DTB_AT_PHYS_ADDR) | |
| 54 | if (be32_to_cpup((__be32 *)CONFIG_NIOS2_DTB_PHYS_ADDR) == | |
| 55 | OF_DT_HEADER) { | |
| 56 | params = (void *)CONFIG_NIOS2_DTB_PHYS_ADDR; | |
| 57 | early_init_dt_scan(params); | |
| 58 | return; | |
| 59 | } | |
| 60 | #endif | |
| 61 | if (be32_to_cpu((__be32) *dtb) == OF_DT_HEADER) | |
| 62 | params = (void *)__dtb_start; | |
| 63 | ||
| 64 | early_init_dt_scan(params); | |
| 65 | } |