2 * This program is free software; you can redistribute it and/or modify it
3 * under the terms of the GNU General Public License version 2 as published
4 * by the Free Software Foundation.
6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
8 * Copyright (C) 2013 John Crispin <john@phrozen.org>
12 #include <linux/clk.h>
13 #include <linux/export.h>
14 #include <linux/init.h>
15 #include <linux/sizes.h>
16 #include <linux/of_fdt.h>
17 #include <linux/kernel.h>
18 #include <linux/bootmem.h>
19 #include <linux/of_platform.h>
20 #include <linux/of_address.h>
22 #include <asm/reboot.h>
23 #include <asm/bootinfo.h>
24 #include <asm/addrspace.h>
29 __iomem void *rt_sysc_membase;
30 __iomem void *rt_memc_membase;
31 EXPORT_SYMBOL_GPL(rt_sysc_membase);
33 __iomem void *plat_of_remap_node(const char *node)
36 struct device_node *np;
38 np = of_find_compatible_node(NULL, NULL, node);
40 panic("Failed to find %s node", node);
42 if (of_address_to_resource(np, 0, &res))
43 panic("Failed to get resource for %s", node);
45 if (!request_mem_region(res.start,
48 panic("Failed to request resources for %s", node);
50 return ioremap_nocache(res.start, resource_size(&res));
53 void __init device_tree_init(void)
55 unflatten_and_copy_device_tree();
58 static int memory_dtb;
60 static int __init early_init_dt_find_memory(unsigned long node,
61 const char *uname, int depth, void *data)
63 if (depth == 1 && !strcmp(uname, "memory@0"))
69 void __init plat_mem_setup(void)
73 set_io_port_base(KSEG1);
76 * Load the builtin devicetree. This causes the chosen node to be
77 * parsed resulting in our memory appearing. fw_passed_dtb is used
78 * by CONFIG_MIPS_APPENDED_RAW_DTB as well.
81 dtb = (void *)fw_passed_dtb;
82 else if (&__dtb_start != &__dtb_end)
83 dtb = (void *)__dtb_start;
87 of_scan_flat_dt(early_init_dt_find_memory, NULL);
89 of_scan_flat_dt(early_init_dt_scan_memory, NULL);
90 else if (soc_info.mem_size)
91 add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
94 detect_memory_region(soc_info.mem_base,
95 soc_info.mem_size_min * SZ_1M,
96 soc_info.mem_size_max * SZ_1M);
99 static int __init plat_of_setup(void)
101 __dt_register_buses(soc_info.compatible, "palmbus");
103 /* make sure that the reset controller is setup early */
109 arch_initcall(plat_of_setup);