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 <blogic@openwrt.org>
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>
21 #include <asm/reboot.h>
22 #include <asm/bootinfo.h>
23 #include <asm/addrspace.h>
28 __iomem
void *rt_sysc_membase
;
29 __iomem
void *rt_memc_membase
;
31 __iomem
void *plat_of_remap_node(const char *node
)
34 struct device_node
*np
;
36 np
= of_find_compatible_node(NULL
, NULL
, node
);
38 panic("Failed to find %s node", node
);
40 if (of_address_to_resource(np
, 0, &res
))
41 panic("Failed to get resource for %s", node
);
43 if ((request_mem_region(res
.start
,
46 panic("Failed to request resources for %s", node
);
48 return ioremap_nocache(res
.start
, resource_size(&res
));
51 void __init
device_tree_init(void)
53 unflatten_and_copy_device_tree();
56 static int memory_dtb
;
58 static int __init
early_init_dt_find_memory(unsigned long node
,
59 const char *uname
, int depth
, void *data
)
61 if (depth
== 1 && !strcmp(uname
, "memory@0"))
67 void __init
plat_mem_setup(void)
69 set_io_port_base(KSEG1
);
72 * Load the builtin devicetree. This causes the chosen node to be
73 * parsed resulting in our memory appearing
75 __dt_setup_arch(__dtb_start
);
77 strlcpy(arcs_cmdline
, boot_command_line
, COMMAND_LINE_SIZE
);
79 of_scan_flat_dt(early_init_dt_find_memory
, NULL
);
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
,
86 detect_memory_region(soc_info
.mem_base
,
87 soc_info
.mem_size_min
* SZ_1M
,
88 soc_info
.mem_size_max
* SZ_1M
);
91 static int __init
plat_of_setup(void)
93 __dt_register_buses(soc_info
.compatible
, "palmbus");
95 /* make sure that the reset controller is setup early */
101 arch_initcall(plat_of_setup
);