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 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)) 46 panic("Failed to request resources for %s", node); 47 48 return ioremap(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 void *dtb; 59 60 set_io_port_base(KSEG1); 61 62 /* 63 * Load the builtin devicetree. This causes the chosen node to be 64 * parsed resulting in our memory appearing. 65 */ 66 dtb = get_fdt(); 67 __dt_setup_arch(dtb); 68 69 if (!early_init_dt_scan_memory()) 70 return; 71 72 if (soc_info.mem_detect) 73 soc_info.mem_detect(); 74 else if (soc_info.mem_size) 75 memblock_add(soc_info.mem_base, soc_info.mem_size * SZ_1M); 76 else 77 detect_memory_region(soc_info.mem_base, 78 soc_info.mem_size_min * SZ_1M, 79 soc_info.mem_size_max * SZ_1M); 80 } 81 82 static int __init plat_of_setup(void) 83 { 84 __dt_register_buses(soc_info.compatible, "palmbus"); 85 86 /* make sure that the reset controller is setup early */ 87 ralink_rst_init(); 88 89 return 0; 90 } 91 92 arch_initcall(plat_of_setup); 93