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Linux/arch/mips/kernel/prom.c

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  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/memblock.h>
 16 #include <linux/debugfs.h>
 17 #include <linux/of.h>
 18 #include <linux/of_fdt.h>
 19 #include <linux/of_platform.h>
 20 
 21 #include <asm/bootinfo.h>
 22 #include <asm/page.h>
 23 #include <asm/prom.h>
 24 
 25 static char mips_machine_name[64] = "Unknown";
 26 
 27 __init void mips_set_machine_name(const char *name)
 28 {
 29         if (name == NULL)
 30                 return;
 31 
 32         strlcpy(mips_machine_name, name, sizeof(mips_machine_name));
 33         pr_info("MIPS: machine is %s\n", mips_get_machine_name());
 34 }
 35 
 36 char *mips_get_machine_name(void)
 37 {
 38         return mips_machine_name;
 39 }
 40 
 41 #ifdef CONFIG_USE_OF
 42 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 43 {
 44         return add_memory_region(base, size, BOOT_MEM_RAM);
 45 }
 46 
 47 int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
 48                                         phys_addr_t size, bool nomap)
 49 {
 50         add_memory_region(base, size, BOOT_MEM_RESERVED);
 51         return 0;
 52 }
 53 
 54 void __init __dt_setup_arch(void *bph)
 55 {
 56         if (!early_init_dt_scan(bph))
 57                 return;
 58 
 59         mips_set_machine_name(of_flat_dt_get_machine_name());
 60 }
 61 
 62 int __init __dt_register_buses(const char *bus0, const char *bus1)
 63 {
 64         static struct of_device_id of_ids[3];
 65 
 66         if (!of_have_populated_dt())
 67                 panic("device tree not present");
 68 
 69         strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
 70         if (bus1) {
 71                 strlcpy(of_ids[1].compatible, bus1,
 72                         sizeof(of_ids[1].compatible));
 73         }
 74 
 75         if (of_platform_populate(NULL, of_ids, NULL, NULL))
 76                 panic("failed to populate DT");
 77 
 78         return 0;
 79 }
 80 
 81 #endif
 82 

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