arch/c6x/kernel/devicetree.c

   1 /*
   2  *  Architecture specific OF callbacks.
   3  *
   4  *  Copyright (C) 2011 Texas Instruments Incorporated
   5  *  Author: Mark Salter <msalter@redhat.com>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  */
  12 #include <linux/init.h>
  13 #include <linux/of.h>
  14 #include <linux/of_fdt.h>
  15 #include <linux/initrd.h>
  16 #include <linux/memblock.h>
  17
  18 void __init early_init_devtree(void *params)
  19 {
  20         /* Setup flat device-tree pointer */
  21         initial_boot_params = params;
  22
  23         /* Retrieve various informations from the /chosen node of the
  24          * device-tree, including the platform type, initrd location and
  25          * size and more ...
  26          */
  27         of_scan_flat_dt(early_init_dt_scan_chosen, c6x_command_line);
  28
  29         /* Scan memory nodes and rebuild MEMBLOCKs */
  30         of_scan_flat_dt(early_init_dt_scan_root, NULL);
  31         of_scan_flat_dt(early_init_dt_scan_memory, NULL);
  32 }
  33
  34
  35 #ifdef CONFIG_BLK_DEV_INITRD
  36 void __init early_init_dt_setup_initrd_arch(unsigned long start,
  37                 unsigned long end)
  38 {
  39         initrd_start = (unsigned long)__va(start);
  40         initrd_end = (unsigned long)__va(end);
  41         initrd_below_start_ok = 1;
  42 }
  43 #endif
  44
  45 void __init early_init_dt_add_memory_arch(u64 base, u64 size)
  46 {
  47         c6x_add_memory(base, size);
  48 }
  49
  50 void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
  51 {
  52         return __va(memblock_alloc(size, align));
  53 }