1 /* 2 * MIPS support for CONFIG_OF device tree support 3 * 4 * Copyright (C) 2010 Cisco Systems Inc. <dediao@cisco.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/init.h> 12 #include <linux/export.h> 13 #include <linux/errno.h> 14 #include <linux/types.h> 15 #include <linux/bootmem.h> 16 #include <linux/initrd.h> 17 #include <linux/debugfs.h> 18 #include <linux/of.h> 19 #include <linux/of_fdt.h> 20 21 #include <asm/page.h> 22 #include <asm/prom.h> 23 24 static char mips_machine_name[64] = "Unknown"; 25 26 __init void mips_set_machine_name(const char *name) 27 { 28 if (name == NULL) 29 return; 30 31 strlcpy(mips_machine_name, name, sizeof(mips_machine_name)); 32 pr_info("MIPS: machine is %s\n", mips_get_machine_name()); 33 } 34 35 char *mips_get_machine_name(void) 36 { 37 return mips_machine_name; 38 } 39 40 #ifdef CONFIG_OF 41 void __init early_init_dt_add_memory_arch(u64 base, u64 size) 42 { 43 return add_memory_region(base, size, BOOT_MEM_RAM); 44 } 45 46 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align) 47 { 48 return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS)); 49 } 50 51 #ifdef CONFIG_BLK_DEV_INITRD 52 void __init early_init_dt_setup_initrd_arch(u64 start, u64 end) 53 { 54 initrd_start = (unsigned long)__va(start); 55 initrd_end = (unsigned long)__va(end); 56 initrd_below_start_ok = 1; 57 } 58 #endif 59 60 int __init early_init_dt_scan_model(unsigned long node, const char *uname, 61 int depth, void *data) 62 { 63 if (!depth) { 64 char *model = of_get_flat_dt_prop(node, "model", NULL); 65 66 if (model) 67 mips_set_machine_name(model); 68 } 69 return 0; 70 } 71 72 void __init __dt_setup_arch(struct boot_param_header *bph) 73 { 74 if (!early_init_dt_scan(bph)) 75 return; 76 77 /* try to load the mips machine name */ 78 of_scan_flat_dt(early_init_dt_scan_model, NULL); 79 } 80 #endif 81