arch/mips/ath79/prom.c

   1 /*
   2  *  Atheros AR71XX/AR724X/AR913X specific prom routines
   3  *
   4  *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   5  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify it
   8  *  under the terms of the GNU General Public License version 2 as published
   9  *  by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/io.h>
  15 #include <linux/string.h>
  16 #include <linux/initrd.h>
  17
  18 #include <asm/bootinfo.h>
  19 #include <asm/addrspace.h>
  20 #include <asm/fw/fw.h>
  21
  22 #include "common.h"
  23
  24 void __init prom_init(void)
  25 {
  26         fw_init_cmdline();
  27
  28         /* Read the initrd address from the firmware environment */
  29         initrd_start = fw_getenvl("initrd_start");
  30         if (initrd_start) {
  31                 initrd_start = KSEG0ADDR(initrd_start);
  32                 initrd_end = initrd_start + fw_getenvl("initrd_size");
  33         }
  34 }
  35
  36 void __init prom_free_prom_memory(void)
  37 {
  38         /* We do not have to prom memory to free */
  39 }