1 /*
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.
5 *
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 <blogic@openwrt.org>
9 */
10
11 #include <linux/io.h>
12 #include <linux/clk.h>
13 #include <linux/init.h>
14 #include <linux/sizes.h>
15 #include <linux/of_fdt.h>
16 #include <linux/kernel.h>
17 #include <linux/bootmem.h>
18 #include <linux/of_platform.h>
19 #include <linux/of_address.h>
20
21 #include <asm/reboot.h>
22 #include <asm/bootinfo.h>
23 #include <asm/addrspace.h>
24 #include <asm/prom.h>
25
26 #include "common.h"
27
28 __iomem void *rt_sysc_membase;
29 __iomem void *rt_memc_membase;
30
plat_of_remap_node(const char * node)31 __iomem void *plat_of_remap_node(const char *node)
32 {
33 struct resource res;
34 struct device_node *np;
35
36 np = of_find_compatible_node(NULL, NULL, node);
37 if (!np)
38 panic("Failed to find %s node", node);
39
40 if (of_address_to_resource(np, 0, &res))
41 panic("Failed to get resource for %s", node);
42
43 if ((request_mem_region(res.start,
44 resource_size(&res),
45 res.name) < 0))
46 panic("Failed to request resources for %s", node);
47
48 return ioremap_nocache(res.start, resource_size(&res));
49 }
50
device_tree_init(void)51 void __init device_tree_init(void)
52 {
53 unflatten_and_copy_device_tree();
54 }
55
plat_mem_setup(void)56 void __init plat_mem_setup(void)
57 {
58 set_io_port_base(KSEG1);
59
60 /*
61 * Load the builtin devicetree. This causes the chosen node to be
62 * parsed resulting in our memory appearing
63 */
64 __dt_setup_arch(__dtb_start);
65
66 if (soc_info.mem_size)
67 add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
68 BOOT_MEM_RAM);
69 else
70 detect_memory_region(soc_info.mem_base,
71 soc_info.mem_size_min * SZ_1M,
72 soc_info.mem_size_max * SZ_1M);
73 }
74
plat_of_setup(void)75 static int __init plat_of_setup(void)
76 {
77 __dt_register_buses(soc_info.compatible, "palmbus");
78
79 /* make sure that the reset controller is setup early */
80 ralink_rst_init();
81
82 return 0;
83 }
84
85 arch_initcall(plat_of_setup);
86