LXR linux/arch/mips/ath79/prom.c

   1/*
   2 *  Atheros AR71XX/AR724X/AR913X specific prom routines
   3 *
   4 *  Copyright (C) 2015 Laurent Fasnacht <l@libres.ch>
   5 *  Copyright (C) 2008-2010 Gabor Juhos <juhosg@openwrt.org>
   6 *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
   7 *
   8 *  This program is free software; you can redistribute it and/or modify it
   9 *  under the terms of the GNU General Public License version 2 as published
  10 *  by the Free Software Foundation.
  11 */
  12
  13#include <linux/kernel.h>
  14#include <linux/init.h>
  15#include <linux/io.h>
  16#include <linux/string.h>
  17#include <linux/initrd.h>
  18
  19#include <asm/bootinfo.h>
  20#include <asm/addrspace.h>
  21#include <asm/fw/fw.h>
  22
  23#include "common.h"
  24
  25void __init prom_init(void)
  26{
  27        fw_init_cmdline();
  28
  29#ifdef CONFIG_BLK_DEV_INITRD
  30        /* Read the initrd address from the firmware environment */
  31        initrd_start = fw_getenvl("initrd_start");
  32        if (initrd_start) {
  33                initrd_start = KSEG0ADDR(initrd_start);
  34                initrd_end = initrd_start + fw_getenvl("initrd_size");
  35        }
  36#endif
  37}
  38
  39void __init prom_free_prom_memory(void)
  40{
  41        /* We do not have to prom memory to free */
  42}
  43