arch/metag/kernel/devtree.c

   1 /*
   2  *  linux/arch/metag/kernel/devtree.c
   3  *
   4  *  Copyright (C) 2012 Imagination Technologies Ltd.
   5  *
   6  *  Based on ARM version:
   7  *  Copyright (C) 2009 Canonical Ltd. <jeremy.kerr@canonical.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/init.h>
  15 #include <linux/export.h>
  16 #include <linux/types.h>
  17 #include <linux/bootmem.h>
  18 #include <linux/memblock.h>
  19 #include <linux/of.h>
  20 #include <linux/of_fdt.h>
  21
  22 #include <asm/setup.h>
  23 #include <asm/page.h>
  24 #include <asm/mach/arch.h>
  25
  26 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
  27 {
  28         pr_err("%s(%llx, %llx)\n",
  29                __func__, base, size);
  30 }
  31
  32 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
  33 {
  34         return alloc_bootmem_align(size, align);
  35 }
  36
  37 static const void * __init arch_get_next_mach(const char *const **match)
  38 {
  39         static const struct machine_desc *mdesc = __arch_info_begin;
  40         const struct machine_desc *m = mdesc;
  41
  42         if (m >= __arch_info_end)
  43                 return NULL;
  44
  45         mdesc++;
  46         *match = m->dt_compat;
  47         return m;
  48 }
  49
  50 /**
  51  * setup_machine_fdt - Machine setup when an dtb was passed to the kernel
  52  * @dt:         virtual address pointer to dt blob
  53  *
  54  * If a dtb was passed to the kernel, then use it to choose the correct
  55  * machine_desc and to setup the system.
  56  */
  57 const struct machine_desc * __init setup_machine_fdt(void *dt)
  58 {
  59         const struct machine_desc *mdesc;
  60
  61         /* check device tree validity */
  62         if (!early_init_dt_scan(dt))
  63                 return NULL;
  64
  65         mdesc = of_flat_dt_match_machine(NULL, arch_get_next_mach);
  66         if (!mdesc)
  67                 dump_machine_table(); /* does not return */
  68         pr_info("Machine name: %s\n", mdesc->name);
  69
  70         return mdesc;
  71 }