1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
5 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
6 * Copyright (C) 2013 John Crispin <john@phrozen.org>
7 */
8
9 #include <linux/io.h>
10 #include <linux/clk.h>
11 #include <linux/export.h>
12 #include <linux/init.h>
13 #include <linux/sizes.h>
14 #include <linux/of_fdt.h>
15 #include <linux/kernel.h>
16 #include <linux/memblock.h>
17 #include <linux/of_platform.h>
18 #include <linux/of_address.h>
19
20 #include <asm/reboot.h>
21 #include <asm/bootinfo.h>
22 #include <asm/addrspace.h>
23 #include <asm/prom.h>
24
25 #include "common.h"
26
27 __iomem void *rt_sysc_membase;
28 __iomem void *rt_memc_membase;
29 EXPORT_SYMBOL_GPL(rt_sysc_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 of_node_put(np);
44
45 if (!request_mem_region(res.start,
46 resource_size(&res),
47 res.name))
48 panic("Failed to request resources for %s", node);
49
50 return ioremap(res.start, resource_size(&res));
51 }
52
plat_mem_setup(void)53 void __init plat_mem_setup(void)
54 {
55 void *dtb;
56
57 set_io_port_base(KSEG1);
58
59 /*
60 * Load the builtin devicetree. This causes the chosen node to be
61 * parsed resulting in our memory appearing.
62 */
63 dtb = get_fdt();
64 __dt_setup_arch(dtb);
65
66 if (!early_init_dt_scan_memory())
67 return;
68
69 if (soc_info.mem_detect)
70 soc_info.mem_detect();
71 else if (soc_info.mem_size)
72 memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M);
73 else
74 detect_memory_region(soc_info.mem_base,
75 soc_info.mem_size_min * SZ_1M,
76 soc_info.mem_size_max * SZ_1M);
77 }
78
plat_of_setup(void)79 static int __init plat_of_setup(void)
80 {
81 __dt_register_buses(soc_info.compatible, "palmbus");
82
83 /* make sure that the reset controller is setup early */
84 ralink_rst_init();
85
86 return 0;
87 }
88
89 arch_initcall(plat_of_setup);
90
