LXR linux/arch/mips/kernel/prom.c

   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/debugfs.h>
  17#include <linux/of.h>
  18#include <linux/of_fdt.h>
  19#include <linux/of_platform.h>
  20
  21#include <asm/page.h>
  22#include <asm/prom.h>
  23
  24static 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
  35char *mips_get_machine_name(void)
  36{
  37        return mips_machine_name;
  38}
  39
  40#ifdef CONFIG_OF
  41void __init early_init_dt_add_memory_arch(u64 base, u64 size)
  42{
  43        return add_memory_region(base, size, BOOT_MEM_RAM);
  44}
  45
  46void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
  47{
  48        return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
  49}
  50
  51void __init __dt_setup_arch(void *bph)
  52{
  53        if (!early_init_dt_scan(bph))
  54                return;
  55
  56        mips_set_machine_name(of_flat_dt_get_machine_name());
  57}
  58
  59int __init __dt_register_buses(const char *bus0, const char *bus1)
  60{
  61        static struct of_device_id of_ids[3];
  62
  63        if (!of_have_populated_dt())
  64                panic("device tree not present");
  65
  66        strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
  67        if (bus1) {
  68                strlcpy(of_ids[1].compatible, bus1,
  69                        sizeof(of_ids[1].compatible));
  70        }
  71
  72        if (of_platform_populate(NULL, of_ids, NULL, NULL))
  73                panic("failed to populate DT");
  74
  75        return 0;
  76}
  77
  78#endif
  79