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 51 void __init device_tree_init(void) 52 { 53 unflatten_and_copy_device_tree(); 54 } 55 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 75 static int __init plat_of_setup(void) 76 { 77 static struct of_device_id of_ids[3]; 78 int len = sizeof(of_ids[0].compatible); 79 80 if (!of_have_populated_dt()) 81 panic("device tree not present"); 82 83 strlcpy(of_ids[0].compatible, soc_info.compatible, len); 84 strlcpy(of_ids[1].compatible, "palmbus", len); 85 86 if (of_platform_populate(NULL, of_ids, NULL, NULL)) 87 panic("failed to populate DT"); 88 89 /* make sure ithat the reset controller is setup early */ 90 ralink_rst_init(); 91 92 return 0; 93 } 94 95 arch_initcall(plat_of_setup); 96