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
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
51void __init device_tree_init(void)
52{
53	unflatten_and_copy_device_tree();
54}
55
56static int memory_dtb;
57
58static int __init early_init_dt_find_memory(unsigned long node,
59				const char *uname, int depth, void *data)
60{
61	if (depth == 1 && !strcmp(uname, "memory@0"))
62		memory_dtb = 1;
63
64	return 0;
65}
66
67void __init plat_mem_setup(void)
68{
69	set_io_port_base(KSEG1);
70
71	/*
72	 * Load the builtin devicetree. This causes the chosen node to be
73	 * parsed resulting in our memory appearing
74	 */
75	__dt_setup_arch(__dtb_start);
76
77	strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
78
79	of_scan_flat_dt(early_init_dt_find_memory, NULL);
80	if (memory_dtb)
81		of_scan_flat_dt(early_init_dt_scan_memory, NULL);
82	else if (soc_info.mem_size)
83		add_memory_region(soc_info.mem_base, soc_info.mem_size * SZ_1M,
84				  BOOT_MEM_RAM);
85	else
86		detect_memory_region(soc_info.mem_base,
87				     soc_info.mem_size_min * SZ_1M,
88				     soc_info.mem_size_max * SZ_1M);
89}
90
91static int __init plat_of_setup(void)
92{
93	__dt_register_buses(soc_info.compatible, "palmbus");
94
95	/* make sure that the reset controller is setup early */
96	ralink_rst_init();
97
98	return 0;
99}
100
101arch_initcall(plat_of_setup);
102