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/bootinfo.h>
  22#include <asm/page.h>
  23#include <asm/prom.h>
  24
  25static 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
  36char *mips_get_machine_name(void)
  37{
  38        return mips_machine_name;
  39}
  40
  41#ifdef CONFIG_USE_OF
  42void __init early_init_dt_add_memory_arch(u64 base, u64 size)
  43{
  44        return add_memory_region(base, size, BOOT_MEM_RAM);
  45}
  46
  47void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
  48{
  49        return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
  50}
  51
  52int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
  53                                        phys_addr_t size, bool nomap)
  54{
  55        add_memory_region(base, size, BOOT_MEM_RESERVED);
  56        return 0;
  57}
  58
  59void __init __dt_setup_arch(void *bph)
  60{
  61        if (!early_init_dt_scan(bph))
  62                return;
  63
  64        mips_set_machine_name(of_flat_dt_get_machine_name());
  65}
  66
  67int __init __dt_register_buses(const char *bus0, const char *bus1)
  68{
  69        static struct of_device_id of_ids[3];
  70
  71        if (!of_have_populated_dt())
  72                panic("device tree not present");
  73
  74        strlcpy(of_ids[0].compatible, bus0, sizeof(of_ids[0].compatible));
  75        if (bus1) {
  76                strlcpy(of_ids[1].compatible, bus1,
  77                        sizeof(of_ids[1].compatible));
  78        }
  79
  80        if (of_platform_populate(NULL, of_ids, NULL, NULL))
  81                panic("failed to populate DT");
  82
  83        return 0;
  84}
  85
  86#endif
  87